##### Table of Contents





UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549





FORM 20-F





(Mark One)

| ̈ | Registration statement pursuant to Section 12(b) or 12(g) of the Securities Exchange Act of 1934
|- | ------------------------------------------------------------------------------------------------

or



|x | Annual report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
|- | ------------------------------------------------------------------------------------

For the fiscal year ended December 31, 2015

or



| ̈ | Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
|- | ----------------------------------------------------------------------------------------

For the transition period from
 to

or



| ̈ | Shell company report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
|- | -------------------------------------------------------------------------------------------

Date of event requiring this shell company report

Commission file number 001-15128





United
Microelectronics Corporation

(Exact Name of Registrant as Specified in its Charter)





Taiwan, Republic of China

(Jurisdiction of Incorporation or Organization)

No. 3 Li-Hsin Road II, Hsinchu Science Park,

Hsinchu City, Taiwan, Republic of China

(Address of Principal Executive Offices)

Chitung Liu, +886-2-2658-9168, chitung_liu@umc.com,

8F, No. 68, Section 1, Neihu Road., Taipei 11493, Taiwan R.O.C.

(Name, Telephone, E-mail and/or Facsimile number and Address of Company Contact Person)



Securities registered or to be registered pursuant to Section
12(b) of the Act:



|                                                                                                            |  |                                          
|----------------------------------------------------------------------------------------------------------- |  | -----------------------------------------
|Title of Each Class                                                                                         |  | Name of Each Exchange on which
Registered
|American Depositary Shares, as evidenced by American Depositary Receipts, each representing 5 Common Shares |  | New York Stock Exchange                  





Securities registered or to be registered pursuant to Section 12(g) of the Act:

None

Securities for
which there is a reporting obligation pursuant to Section 15(d) of the Act:

None





Indicate the number of outstanding shares of each of the Issuers classes of capital or common stock as of the close of the period
covered by the annual report.

12,758,132,915 Common Shares of Registrant issued as of December 31, 2015 (including 333,814,200
treasury shares)

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities
Act.    Yes  x    No   ̈

If this report is an annual or transition report, indicate by check mark if the registrant is not required to file reports pursuant to Section
13 or 15(d) of the Securities Exchange Act of 1934.    Yes   ̈    No  x

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities
Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90
days.    Yes  x    No   ̈

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive
Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such
files).    Yes   ̈    No   ̈

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, or a non-accelerated filer. See definition
of accelerated filer and large accelerated filer in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer  x        
         Accelerated filer    ̈                 Non-accelerated
filer   ̈

Indicate by check mark which basis of accounting the registrant has
used to prepare the financial statements included in this filing:



|             |  |                                                                                                          |  |         
|------------ |  | -------------------------------------------------------------------------------------------------------- |  | --------
|U.S. GAAP   ̈ |  | International Financial Reporting Standards as issued
by the International Accounting Standards Board  x |  | Other   ̈

If Other has been checked in response to the previous question, indicate by check mark which
financial statement item the registrant has elected to follow. Item 17   ̈    Item 18   ̈

If this is an annual report, indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Securities
Exchange Act of 1934).    Yes   ̈    No  x









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##### Table of Contents

UNITED MICROELECTRONICS CORPORATION

FORM 20-F ANNUAL REPORT

FISCAL YEAR ENDED DECEMBER 31, 2014

Table of Contents



|                         |  |                                                                              |   |      |    | 
|------------------------ |  | ---------------------------------------------------------------------------- | - | ---- | -- | 
|                         |  |                                                                              |   | Page |   
|                         | 
|SUPPLEMENTAL INFORMATION |  |                                                                              | 1 |     
|                         |  |                                                                             
|PART I                   |  |                                                                              |   |      | 4  | 
|                         |  |                                                                             
|ITEM 1.                  |  | IDENTITY OF DIRECTORS, SENIOR MANAGEMENT AND ADVISERS                        |   |      | 4  | 
|ITEM 2.                  |  | OFFER STATISTICS AND EXPECTED TIMETABLE                                      |   |      | 4  | 
|ITEM 3.                  |  | KEY INFORMATION                                                              |   |      | 4  | 
|ITEM 4.                  |  | INFORMATION ON THE COMPANY                                                   |   |      | 22 | 
|ITEM 4A.                 |  | UNRESOLVED STAFF COMMENTS                                                    |   |      | 42 | 
|ITEM 5.                  |  | OPERATING AND FINANCIAL REVIEW AND PROSPECTS                                 |   |      | 42 | 
|ITEM 6.                  |  | DIRECTORS, SENIOR MANAGEMENT AND EMPLOYEES                                   |   |      | 58 | 
|ITEM 7.                  |  | MAJOR STOCKHOLDERS AND RELATED PARTY TRANSACTIONS                            |   |      | 62 | 
|ITEM 8.                  |  | FINANCIAL INFORMATION                                                        |   |      | 63 | 
|ITEM 9.                  |  | THE OFFER AND LISTING                                                        |   |      | 64 | 
|ITEM 10.                 |  | ADDITIONAL INFORMATION                                                       |   |      | 66 | 
|ITEM 11.                 |  | QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK                   |   |      | 86 | 
|ITEM 12.                 |  | DESCRIPTION OF SECURITIES OTHER THAN EQUITY SECURITIES                       |   |      | 88 | 
|                         |  |                                                                             
|PART II                  |  |                                                                              |   |      | 89 | 
|                         |  |                                                                             
|ITEM 13.                 |  | DEFAULTS, DIVIDEND ARREARAGES AND DELINQUENCIES                              |   |      | 89 | 
|ITEM 14.                 |  | MATERIAL MODIFICATIONS TO THE RIGHTS OF SECURITY HOLDERS AND USE OF PROCEEDS |   |      | 89 | 
|ITEM 15.                 |  | CONTROLS AND PROCEDURES                                                      |   |      | 90 | 
|ITEM 16.                 |  |                                                                              |   |      |    | 
|ITEM 16A.                |  | AUDIT COMMITTEE FINANCIAL EXPERT                                             |   |      | 92 | 
|ITEM 16B.                |  | CODE OF ETHICS                                                               |   |      | 92 | 
|ITEM 16C.                |  | PRINCIPAL ACCOUNTANT FEES AND SERVICES                                       |   |      | 92 | 
|ITEM 16D.                |  | EXEMPTIONS FROM THE LISTING STANDARDS FOR AUDIT COMMITTEES                   |   |      | 93 | 
|ITEM 16E.                |  | PURCHASE OF EQUITY SECURITIES BY THE ISSUER AND AFFILIATED
PURCHASERS        |   |      | 93 | 
|ITEM 16F.                |  | CHANGE IN REGISTRANTS CERTIFYING ACCOUNTANT                                 |   |      | 93 | 
|ITEM 16G.                |  | CORPORATE GOVERNANCE                                                         |   |      | 93 | 
|ITEM 16H.                |  | MINE SAFETY DISCLOSURE                                                       |   |      | 94 | 
|                         |  |                                                                             
|PART III                 |  |                                                                              |   |      | 94 | 
|                         |  |                                                                             
|ITEM 17.                 |  | FINANCIAL STATEMENTS                                                         |   |      | 94 | 
|ITEM 18.                 |  | FINANCIAL STATEMENTS                                                         |   |      | 95 | 
|ITEM 19.                 |  | EXHIBITS                                                                     |   |      | 95 | 



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SUPPLEMENTAL INFORMATION

The references to United Microelectronics, we, us, our, our company and the
Company in this annual report refer to United Microelectronics Corporation and its consolidated subsidiaries, unless the context suggests otherwise. The references to Taiwan and R.O.C. refer to Taiwan, Republic of
China. The references to China and PRC refer to Peoples Republic of China. The references to shares and common shares refer to our common shares, par value NT$10 per share, and ADSs
refers to our American depositary shares, each representing five common shares. The ADSs are issued under the Deposit Agreement, dated as of October 21, 2009, as amended, supplemented or modified from time to time, among United Microelectronics,
JPMorgan Chase Bank, N.A. and the holders and beneficial owners from time to time of American Depositary Receipts issued thereunder. The references to TIFRSs refers to the Taiwan International Financial Reporting Standards as issued by
the Financial Supervisory Commission in the Republic of China, IFRSs refers to International Financial Reporting Standards as issued by the International Accounting Standards Board, or IASB, R.O.C. GAAP refers to the
generally accepted accounting principles in the Republic of China, and U.S. GAAP refers to the generally accepted accounting principles in the United States. Any discrepancies in any table between totals and sums of the amounts listed
are due to rounding.

We publish our financial statements in New Taiwan dollars, the lawful currency of the R.O.C. In this annual report,
NT$ and NT dollars mean New Taiwan dollars, $, US$ and U.S. dollars mean United States dollars, ¥ means Japanese Yen, RMB¥ means Renminbi and
 means EURO.

FORWARD-LOOKING STATEMENTS IN THIS ANNUAL REPORT MAY NOT BE REALIZED

Our disclosure and analysis in this annual report contain or incorporate by reference some forward-looking statements. Our forward-looking
statements contain information regarding, among other things, our financial condition, future expansion plans and business strategy. We have based these forward-looking statements on our current expectations and projections about future events. You
can identify these statements by the fact that they do not relate strictly to historical or current facts. Although we believe that these expectations and projections are reasonable, such forward-looking statements are inherently subject to risks,
uncertainties and assumptions about us, including, among other things:



| |  |  | our dependence on frequent introduction of new product services and technologies based on the latest developments;
| | - |  | ------------------------------------------------------------------------------------------------------------------



| |  |  | the intensely competitive semiconductor, communications, consumer electronics and computer industries and markets;
| | - |  | ------------------------------------------------------------------------------------------------------------------



| |  |  | risks associated with our international business activities;
| | - |  | ------------------------------------------------------------



| |  |  | our dependence on key personnel;
| | - |  | --------------------------------



| |  |  | general economic and political conditions, including those related to the semiconductor, communications, consumer electronics and computer industries;
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | natural disasters, such as earthquakes and droughts, which are beyond our control;
| | - |  | ----------------------------------------------------------------------------------



| |  |  | possible disruptions in commercial activities caused by natural and human-induced disasters, and outbreaks of contagious diseases;
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------



| |  |  | fluctuations in foreign currency exchange rates;
| | - |  | ------------------------------------------------



| |  |  | additional disclosures we make in our previous and future Form 20-F annual reports and Form 6-K periodic reports to the U.S. Securities and Exchange Commission, or the U.S. SEC; and
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | those other risks identified in the Item 3. Key Information-D. Risk Factors section of this annual report.
| | - |  | ------------------------------------------------------------------------------------------------------------



1



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The words may, will, is/are likely to,
anticipate, believe, estimate, expect, intend, plan and similar expressions are intended to identify a number of these forward-looking statements. We do not and will not
undertake the obligation to update or revise any forward-looking statements contained in this annual report whether as a result of new information, future events or otherwise. In light of these risks, uncertainties and assumptions, the
forward-looking events discussed in this annual report might not occur and our actual results could differ materially from those anticipated in these forward-looking statements.

GLOSSARY



|                   |  |                                                                                                                                                                                                                                                                                                                             
|------------------ |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|ASIC               |  | Application Specific Integrated Circuit. A custom-designed integrated circuit that performs specific functions which would otherwise require a number of off-the-shelf integrated circuits to perform.                                                                                                                      
|                   | 
|BCD                |  | Bipolar- Complementary Metal Oxide Semiconductor (CMOS)- Double Diffused Metal Oxide Semiconductor (DMOS). An integrated circuit and is one of the most important components for power management integration
circuits.                                                                                                 
|                   | 
|BSI-CSI            |  | Back-Side Illuminated CMOS Image Sensor, which is recently used for mobile product image sensor with better performance and thinner chip.                                                                                                                                                                                   
|                   | 
|Cell               |  | Semiconductor structure in an electrical state which can store a bit of information, mainly used as the building block of memory array.                                                                                                                                                                                     
|                   | 
|Die                |  | A piece of a semiconductor wafer containing the circuitry of an unpackaged single chip.                                                                                                                                                                                                                                     
|                   | 
|DRAM               |  | Dynamic Random Access Memory. A type of volatile memory product that is used in electronic systems to store data and program instructions. It is the most common type of RAM and must be refreshed with electricity hundreds of times
per second or else it will fade away.                                                 
|                   | 
|eFlash             |  | Embedded Flash Nonvolatile Memory. Used for most SoC (System-on-Chip) applications and has faster speed and enhanced security.                                                                                                                                                                                            
|                   | 
|eHV                |  | Embedded High Voltage Device. Used for Liquid Crystal Display (LCD) driver circuit to drive LCD devices.                                                                                                                                                                                                                  
|                   | 
|EUV Lithography    |  | Extreme Ultraviolet Lithography.                                                                                                                                                                                                                                                                                            
|                   | 
|FinFET             |  | Fin Field-Effect Transistor.                                                                                                                                                                                                                                                                                                
|                   | 
|FPGA               |  | Field Programmable Gate Array. A programmable integrated circuit.                                                                                                                                                                                                                                                           
|                   | 
|Integrated Circuit |  | Entire electronic circuit built on a single piece of solid substrate and enclosed in a small package. The package is equipped with leads needed to electrically integrate the integrated circuit with a larger electronic system.
Monolithic and hybrid integrated circuits are distinguished by the type of substrate used.
|                   | 
|Interconnect       |  | The conductive path made from copper or aluminum that is required to achieve connection from one circuit element to the other circuit elements within a circuit.                                                                                                                                                            
|                   | 
|Mask or Photomask  |  | A piece of glass on which an integrated circuit circuitry design is laid out.                                                                                                                                                                                                                                               



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|                         |  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|------------------------ |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Memory                   |  | A group of integrated circuits that a computer uses to store data and programs, such as ROM, RAM, DRAM and SRAM.                                                                                                                                                                                                                                                                                                                                                                                                                                                              
|                         | 
|Micron                   |  | A unit of spatial measurement that is one-millionth of a meter.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|                         | 
|Nanometer                |  | A unit of spatial measurement that is one-billionth of a meter.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|                         | 
|PC                       |  | Personal computer.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|                         | 
|RAM                      |  | Random Access Memory. A type of volatile memory forming the main memory of a computer where applications and files are run.                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|                         | 
|ROM                      |  | Read-Only Memory. Memory that is programmed by the manufacturer and cannot be changed. Typically, ROM is used to provide start-up data when a computer is first turned on.                                                                                                                                                                                                                                                                                                                                                                                                    
|                         | 
|Scanner                  |  | A photolithography tool used in the production of semiconductor devices. This camera-like step-and-scan tool projects the image of a circuit from a master image onto a photosensitized silicon wafer.                                                                                                                                                                                                                                                                                                                                                                        
|                         | 
|Semiconductor            |  | A material with electrical conducting properties in between those of metals and insulators. Essentially, semiconductors transmit electricity only under certain circumstances, such as when given a positive or negative electric
charge. Therefore, a semiconductors ability to conduct can be turned on or off by manipulating those charges and this allows the semiconductor to act as an electric switch. The most common semiconductor material is silicon, used as the base of
most semiconductor chips today because it is relatively inexpensive and easy to create.
|                         | 
|SoC                      |  | System-on-Chip. A chip that incorporates functions currently performed by several chips on a cost effective basis.                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|                         | 
|SOI                      |  | Silicon-On-Insulator. Silicon wafer consisting of a thin layer of oxide, on top of which semiconductor devices are built.                                                                                                                                                                                                                                                                                                                                                                                                                                                     
|                         | 
|SRAM                     |  | Static Random Access Memory. A type of volatile memory product that is used in electronic systems to store data and program instructions. Unlike the more common DRAM, it does not need to be refreshed.                                                                                                                                                                                                                                                                                                                                                                      
|                         | 
|Transistor               |  | Tri-terminal semiconductor device in which input signal (voltage or current depending on the type of transistor) controls output current. An individual circuit that can amplify or switch electric current. This is the building
block of all integrated circuits.                                                                                                                                                                                                                                                                                                           
|                         | 
|Volatile memory          |  | Memory products which lose their data content when the power supply is switched off.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
|                         | 
|Wafer                    |  | Thin, round, flat piece of silicon that is the base of most integrated circuits.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
|                         | 
|8-inch wafer equivalents |  | Standard unit describing the equivalent amount of 8-inch wafers produced after conversion, used to quantify levels of wafer production for purposes of comparison. Figures of 8-inch wafer equivalents are derived by converting the
number of wafers of all dimensions (e.g., 6-inch, 8-inch and 12-inch) into their equivalent figures for 8-inch wafers. 100 6-inch wafers are equivalent to 56.25 8-inch wafers. 100 12-inch wafers are equivalent to 225 8-inch wafers.                                                                                                  



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PART I



|ITEM 1. | IDENTITY OF DIRECTORS, SENIOR MANAGEMENT AND ADVISERS
|------- | -----------------------------------------------------

Not applicable.



|ITEM 2. | OFFER STATISTICS AND EXPECTED TIMETABLE
|------- | ---------------------------------------

Not applicable.



|ITEM 3. | KEY INFORMATION
|------- | ---------------



|A. | Selected Financial Data
|-- | -----------------------

The selected consolidated balance sheets data as of December
31, 2014 and 2015 and the selected consolidated statements of comprehensive income data for the years ended December 31, 2013, 2014 and 2015 are derived from our audited consolidated financial statements included elsewhere in this annual report. In
accordance with the requirements of the Taiwan Financial Supervisory Commission, or FSC, beginning on January 1, 2013, we have adopted Taiwan-IFRSs, which is translated and published by Accounting Research and Development Foundation, or ARDF,
referred to as TIFRSs for reporting our annual and interim consolidated financial statements in the R.O.C. At the same time, we have adopted IFRSs as issued by the IASB for our annual reports on Form 20-F with the U.S. SEC beginning with
the year ended December 31, 2013. However, since January 1, 2013, we only prepare our interim unaudited quarterly financial statements under TIFRSs, which are furnished to the SEC on Form 6-K. The selected consolidated balance sheet data as of
January 1, 2012, December 31, 2012 and 2013 and the selected consolidated statements of comprehensive income data for the year ended December 31, 2012 are derived from our audited consolidated financial statements not included in this annual report.

In accordance with rule amendments adopted by the U.S. SEC for foreign private issuers reporting under IFRSs, we are not required to
provide reconciliations to U.S. GAAP in this annual report following our adoption of IFRSs.

The selected financial data set forth below
should be read in conjunction with Item 5. Operating and Financial Review and Prospects and our consolidated financial statements and the notes to those statements included in this annual report.



|                                                     |  |                                                  |         |   |      |  |          |      |  |  |          |   |  |     |          |   |  |  |        |  
|---------------------------------------------------- |  | ------------------------------------------------ | ------- | - | ---- |  | -------- | ---- |  |  | -------- | - |  | --- | -------- | - |  |  | ------ | -
|                                                     |  | Years Ended December 31,                         |        
|                                                     |  | 2012                                             |         |   | 2013 |  |          | 2014 |  |  | 2015     |  
|                                                     |  | NT$                                              |         |   | NT$  |  |          | NT$  |  |  | NT$      |   |  | US$ |         
|                                                     |  | (in millions, except per share and per ADS data) |        
|Consolidated Statements of Comprehensive Income Data |  |                                                  |         |   |      |  |          |      |  |  |          |   |  |     |          |   |  |  |        |  
|Net operating revenues                               |  |                                                  | 115,675 |   |      |  | 123,812  |      |  |  | 140,012  |   |  |     | 144,830  |   |  |  | 4,417  |  
|Operating costs                                      |  |                                                  | (96,365 | ) |      |  | (100,249 | )    |  |  | (108,159 | ) |  |     | (113,061 | ) |  |  | (3,448 | )
|                                                     |  |                                                  |         |   |      |  |          |      |  |  |          |   |  |     |          |   |  |  |        |  
|Gross profit                                         |  |                                                  | 19,310  |   |      |  | 23,563   |      |  |  | 31,853   |   |  |     | 31,769   |   |  |  | 969    |  
|Operating expenses                                   |  |                                                  | (15,697 | ) |      |  | (19,406  | )    |  |  | (21,238  | ) |  |     | (19,969  | ) |  |  | (609   | )
|Net other operating income and expenses              |  |                                                  | (2,791  | ) |      |  | (125     | )    |  |  | (539     | ) |  |     | (964     | ) |  |  | (29    | )
|                                                     |  |                                                  |         |   |      |  |          |      |  |  |          |   |  |     |          |   |  |  |        |  
|Operating income                                     |  |                                                  | 822     |   |      |  | 4,032    |      |  |  | 10,076   |   |  |     | 10,836   |   |  |  | 331    |  
|Non-operating income and expenses                    |  |                                                  | 5,473   |   |      |  | 10,309   |      |  |  | 3,496    |   |  |     | 2,833    |   |  |  | 86     |  
|                                                     |  |                                                  |         |   |      |  |          |      |  |  |          |   |  |     |          |   |  |  |        |  
|Income from continuing operations before income tax  |  |                                                  | 6,295   |   |      |  | 14,341   |      |  |  | 13,572   |   |  |     | 13,669   |   |  |  | 417    |  
|Income tax expense                                   |  |                                                  | (2,146  | ) |      |  | (2,257   | )    |  |  | (3,125   | ) |  |     | (1,028   | ) |  |  | (31    | )
|                                                     |  |                                                  |         |   |      |  |          |      |  |  |          |   |  |     |          |   |  |  |        |  
|Net income                                           |  |                                                  | 4,149   |   |      |  | 12,084   |      |  |  | 10,447   |   |  |     | 12,641   |   |  |  | 386    |  
|Total other comprehensive income (loss), net of tax  |  |                                                  | (6,381  | ) |      |  | 198      |      |  |  | 6,069    |   |  |     | (1,065   | ) |  |  | (32    | )
|                                                     |  |                                                  |         |   |      |  |          |      |  |  |          |   |  |     |          |   |  |  |        |  
|Total comprehensive income (loss)                    |  |                                                  | (2,232  | ) |      |  | 12,282   |      |  |  | 16,516   |   |  |     | 11,576   |   |  |  | 354    |  
|                                                     |  |                                                  |         |   |      |  |          |      |  |  |          |   |  |     |          |   |  |  |        |  
|                                                     |  |                                                  |         |   |     
|Net income attributable to:                          |  |                                                  |         |   |      |  |          |      |  |  |          |   |  |     |          |   |  |  |        |  
|Stockholders of the parent                           |  |                                                  | 6,094   |   |      |  | 12,609   |      |  |  | 11,109   |   |  |     | 13,254   |   |  |  | 404    |  
|Non-controlling interests                            |  |                                                  | (1,945  | ) |      |  | (525     | )    |  |  | (662     | ) |  |     | (613     | ) |  |  | (18    | )
|                                                     |  |                                                  |         |   |     
|Total comprehensive income (loss) attributable to:   |  |                                                  |         |   |      |  |          |      |  |  |          |   |  |     |          |   |  |  |        |  
|Stockholders of the parent                           |  |                                                  | (281    | ) |      |  | 12,796   |      |  |  | 17,035   |   |  |     | 12,251   |   |  |  | 374    |  
|Non-controlling interests                            |  |                                                  | (1,951  | ) |      |  | (514     | )    |  |  | (519     | ) |  |     | (675     | ) |  |  | (20    | )



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|                                                      |  |                                                  |        |  |      |  |        |      |  |  |        |  |  |     |        |  |  |  |        | 
|----------------------------------------------------- |  | ------------------------------------------------ | ------ |  | ---- |  | ------ | ---- |  |  | ------ |  |  | --- | ------ |  |  |  | ------ | 
|                                                      |  | Years Ended December 31,                         |       
|                                                      |  | 2012                                             |        |  | 2013 |  |        | 2014 |  |  | 2015   | 
|                                                      |  | NT$                                              |        |  | NT$  |  |        | NT$  |  |  | NT$    |  |  | US$ |       
|                                                      |  | (in millions, except per share and per ADS data) |       
|                                                      |  |                                                  |        |  |     
|Earnings per share: (1)                               |  |                                                  |        |  |      |  |        |      |  |  |        |  |  |     |        |  |  |  |        | 
|Basic                                                 |  |                                                  | 0.49   |  |      |  | 1.02   |      |  |  | 0.90   |  |  |     | 1.07   |  |  |  | 0.03   | 
|Diluted (2)                                           |  |                                                  | 0.46   |  |      |  | 0.96   |      |  |  | 0.89   |  |  |     | 1.02   |  |  |  | 0.03   | 
|Common shares used in earnings per share calculation: |  |                                                  |        |  |      |  |        |      |  |  |        |  |  |     |        |  |  |  |        | 
|Basic                                                 |  |                                                  | 12,464 |  |      |  | 12,346 |      |  |  | 12,334 |  |  |     | 12,336 |  |  |  | 12,336 | 
|Diluted (2)                                           |  |                                                  | 13,289 |  |      |  | 13,150 |      |  |  | 12,719 |  |  |     | 13,171 |  |  |  | 13,171 | 
|Earnings per ADS equivalent:                          |  |                                                  |        |  |      |  |        |      |  |  |        |  |  |     |        |  |  |  |        | 
|Basic                                                 |  |                                                  | 2.44   |  |      |  | 5.11   |      |  |  | 4.50   |  |  |     | 5.37   |  |  |  | 0.16   | 
|Diluted (2)                                           |  |                                                  | 2.32   |  |      |  | 4.82   |      |  |  | 4.44   |  |  |     | 5.10   |  |  |  | 0.16   | 



|                                 |  |                                      |         |  |                    |  |         |      |  |  |         |  |  |      |         |  |     |  |         |  |  |  |        | 
|-------------------------------- |  | ------------------------------------ | ------- |  | ------------------ |  | ------- | ---- |  |  | ------- |  |  | ---- | ------- |  | --- |  | ------- |  |  |  | ------ | 
|                                 |  | As ofJanuary 1,                      |         |  | As of December 31, | 
|                                 |  | 2012                                 |         |  | 2012               |  |         | 2013 |  |  | 2014    |  |  | 2015 |        
|                                 |  | NT$                                  |         |  | NT$                |  |         | NT$  |  |  | NT$     |  |  | NT$  |         |  | US$ | 
|                                 |  | (in millions, except per share data) |        
|Consolidated Balance Sheets Data |  |                                      |         |  |                    |  |         |      |  |  |         |  |  |      |         |  |     |  |         | 
|Total assets                     |  |                                      | 279,336 |  |                    |  | 281,214 |      |  |  | 293,914 |  |  |      | 310,648 |  |     |  | 335,354 |  |  |  | 10,227 | 
|Total liabilities                |  |                                      | 69,780  |  |                    |  | 79,526  |      |  |  | 84,270  |  |  |      | 90,309  |  |     |  | 110,502 |  |  |  | 3,370  | 
|Stockholders equity             |  |                                      | 209,556 |  |                    |  | 201,688 |      |  |  | 209,644 |  |  |      | 220,339 |  |     |  | 224,852 |  |  |  | 6,857  | 
|Capital stock (3)                |  |                                      | 130,845 |  |                    |  | 129,521 |      |  |  | 126,946 |  |  |      | 127,303 |  |     |  | 127,581 |  |  |  | 3,891  | 
|Dividends declared per share (4) |  |                                      | 1.11    |  |                    |  | 0.50    |      |  |  | 0.40    |  |  |      | 0.50    |  |     |  | 0.55    |  |  |  | 0.02   | 



|                       |  |                          |         |   |      |  |         |      |  |  |         |   |  |     |         |   |  |  |       |  
|---------------------- |  | ------------------------ | ------- | - | ---- |  | ------- | ---- |  |  | ------- | - |  | --- | ------- | - |  |  | ----- | -
|                       |  | Years ended December 31, |        
|                       |  | 2012                     |         |   | 2013 |  |         | 2014 |  |  | 2015    |  
|                       |  | NT$                      |         |   | NT$  |  |         | NT$  |  |  | NT$     |   |  | US$ |        
|                       |  | (in millions)            |        
|Segment Data           |  |                          |         |   |      |  |         |      |  |  |         |   |  |     |         |   |  |  |       |  
|Net operating revenues |  |                          |         |   |      |  |         |      |  |  |         |   |  |     |         |   |  |  |       |  
|Wafer fabrication      |  |                          | 108,624 |   |      |  | 116,782 |      |  |  | 129,449 |   |  |     | 141,145 |   |  |  | 4,305 |  
|New business           |  |                          | 7,051   |   |      |  | 7,030   |      |  |  | 10,563  |   |  |     | 3,685   |   |  |  | 112   |  
|Net income (loss)(5)   |  |                          |         |   |      |  |         |      |  |  |         |   |  |     |         |   |  |  |       |  
|Wafer fabrication      |  |                          | 6,177   |   |      |  | 12,761  |      |  |  | 12,350  |   |  |     | 13,620  |   |  |  | 415   |  
|New business           |  |                          | (5,583  | ) |      |  | (2,583  | )    |  |  | (2,546  | ) |  |     | (1,962  | ) |  |  | (60   | )



|(1) | Earnings per share is calculated by dividing net income by the weighted-average number of common shares outstanding during the year.
|--- | ------------------------------------------------------------------------------------------------------------------------------------

|(2) | Diluted securities include convertible bonds, employee stock options and employees compensation, if any.
|--- | ---------------------------------------------------------------------------------------------------------

|(3) | Changes to the number of the capital common shares are primarily caused by the share-based payment transactions and the cancellation of treasury stocks, if any.
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------

|(4) | Dividends declared per share are in connection with earnings and accumulated additional paid-in capital.
|--- | --------------------------------------------------------------------------------------------------------

|(5) | There are adjustments primarily consisted of intragroup elimination entries and GAAP difference adjustments.
|--- | ------------------------------------------------------------------------------------------------------------



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##### Table of Contents

Currency Translations and Exchange Rates

In portions of this annual report, we have translated New Taiwan dollar amounts into U.S. dollars for the convenience of readers. The rate we
used for the translations was NT$32.79 = US$1.00, which was the noon buying rate as certified for customs purposes by the Federal Reserve Bank of New York on December 31, 2015. The translation does not mean that New Taiwan dollars could actually be
converted into U.S. dollars at that rate. The following table shows the noon buying rates for New Taiwan dollars expressed in New Taiwan dollar per US$1.00. On April 8, 2016, the noon buying rate was NT$32.40 to US$1.00.



|                        |  |             |       |  |      |  |       |     |  |  |               |  |  |  |       | 
|----------------------- |  | ----------- | ----- |  | ---- |  | ----- | --- |  |  | ------------- |  |  |  | ----- | 
|                        |  | Average (1) |       |  | High |  |       | Low |  |  | At Period-End | 
|2011                    |  |             | 29.38 |  |      |  | 30.67 |     |  |  | 28.50         |  |  |  | 30.27 | 
|2012                    |  |             | 29.56 |  |      |  | 30.28 |     |  |  | 28.96         |  |  |  | 29.05 | 
|2013                    |  |             | 29.73 |  |      |  | 30.20 |     |  |  | 29.93         |  |  |  | 29.83 | 
|2014                    |  |             | 30.38 |  |      |  | 31.80 |     |  |  | 29.85         |  |  |  | 31.60 | 
|2015                    |  |             | 31.80 |  |      |  | 33.17 |     |  |  | 30.37         |  |  |  | 32.79 | 
|October                 |  |             | 32.44 |  |      |  | 32.81 |     |  |  | 31.92         |  |  |  | 32.46 | 
|November                |  |             | 32.62 |  |      |  | 32.87 |     |  |  | 32.43         |  |  |  | 32.53 | 
|December                |  |             | 32.79 |  |      |  | 33.01 |     |  |  | 32.53         |  |  |  | 32.79 | 
|2016 (through April 8)  |  |             | 33.00 |  |      |  | 33.74 |     |  |  | 32.16         |  |  |  | 32.40 | 
|January                 |  |             | 33.43 |  |      |  | 33.74 |     |  |  | 33.14         |  |  |  | 33.43 | 
|February                |  |             | 33.24 |  |      |  | 33.51 |     |  |  | 32.95         |  |  |  | 33.22 | 
|March                   |  |             | 32.59 |  |      |  | 33.09 |     |  |  | 32.16         |  |  |  | 32.18 | 
|April (through April 8) |  |             | 32.38 |  |      |  | 32.44 |     |  |  | 32.26         |  |  |  | 32.40 | 



Source:
Federal Reserve Statistical Release, Board of Governors of the Federal Reserve System.



|(1) | Determined by averaging the rates on the last business day of each month during the relevant period for annual periods, and by averaging the rates on each business day for monthly periods.
|--- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|B. | Capitalization and Indebtedness
|-- | -------------------------------

Not applicable.



|C. | Reasons for the Offer and Use of Proceeds
|-- | -----------------------------------------

Not applicable.



|D. | Risk Factors
|-- | ------------

Our business and operations are subject to various risks, many of which
are beyond our control. If any of the risks described below actually occurs, our business, financial condition or results of operations could be seriously harmed.

Risks Related to Our Business and Financial Condition

Any global systemic political, economic and financial crisis or catastrophic natural disasters (as well as the indirect effects flowing therefrom) could
negatively affect our business, results of operations, and financial condition.

In recent times, several major systemic economic
and financial crises and natural disasters negatively affected global business, banking and financial sectors, including the semiconductor industry and markets. These types of crises cause turmoil in global markets that often result in declines in
electronic products sales from which we generate our income through our goods and services. In addition, these crises may cause a number of indirect effects such as undermining the ability of our customers to remain competitive when faced with the
financial and economic challenges created by insolvent countries and companies still struggling to survive in the wake of these crises. For example, there could be in the future knock-on effects from these types of crises on our business, including
significant decreases in orders from our customers; insolvency of key suppliers resulting in product delays; inability of customers to obtain credit to finance purchases of our products; customer insolvencies; and counterparty failures negatively
impacting our treasury operations. Any future systemic political, economic or financial crises or catastrophic natural disasters (as well as the indirect effects flowing from these crises or disasters) could cause revenues for the semiconductor
industry as a whole to decline dramatically, and if the economic conditions or financial condition of our customers were to deteriorate, additional accounting related allowances may be required in the future and such additional allowances could
increase our operating expenses and therefore reduce our operating income and net income. Thus, any future global economic crisis or catastrophic natural disaster (and their indirect effects) could materially and adversely affect our results of
operations.



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In 2009, we established a 100% owned subsidiary, UMC New Business Investment Corporation, or NBI,
to focus on investments in the solar energy, and light emitting diodes, or LED, light source module design, epi wafer manufacturing, and packaging. In recent years, the growth of solar energy and LED industries is adversely affected by the on-going
anti-subsidy and anti-dumping investigations from various regions, the combination of an increase in supply coupled with a decrease in the availability of government subsidies and the decrease in the price of international crude oil resulted in an
excess of supply in the solar energy and LED industries and negative pressure on the pricing. As a result, we recognized impairment for our investments in these industries made through NBI. If the solar energy and LED industries continue to
encounter significant downturns or significant reductions of government subsidies, our investments made through NBI will be adversely affected which could adversely affect our results of operations.

The seasonality and cyclical nature of the semiconductor industry and periodic overcapacity make us particularly vulnerable to significant and sometimes
prolonged economic downturns.

The semiconductor industry has historically been highly cyclical and, at various times, has
experienced significant downturns. Since most of our customers operate in semiconductor-related industries, variations in order levels from our customers can result in volatility in our revenues and earnings. Because our business is, and will
continue to be, largely dependent on the requirements of semiconductor companies for our services, downturns in the semiconductor industry will lead to reduced demand for our services.

Our net operating revenues are also typically affected by seasonal variations in market conditions that contribute to the fluctuations of the
average selling price of semiconductor services and products. The seasonal sales trends for semiconductor services and products closely mirror those for consumer electronics, communication and computer sales. We generally experience seasonal lows in
the demand for semiconductor services and products during the first half of the year, primarily as a result of inventory correction by our customers. Any change in the general seasonal variations, which we cannot anticipate, may result in materially
adverse effects on our revenues, operations and businesses.

Our operating results fluctuate from quarter to quarter, which makes it difficult to
predict our future performance.

Our revenues, expenses and results of operations have varied significantly in the past and may
fluctuate significantly from quarter to quarter in the future due to a number of factors, many of which are beyond our control. Our business and operations have at times in the past been negatively affected by, and are expected to continue to be
subject to the risk of the following factors:



| |  |  | the seasonality and cyclical nature of both the semiconductor industry and the markets served by our customers;
| | - |  | ---------------------------------------------------------------------------------------------------------------



| |  |  | our customers adjustments in their inventory;
| | - |  | ----------------------------------------------



| |  |  | the loss of a key customer or the postponement of orders from a key customer;
| | - |  | -----------------------------------------------------------------------------



| |  |  | the rescheduling and cancellation of large orders;
| | - |  | --------------------------------------------------



| |  |  | our ability to obtain equipment, raw materials, electricity, water and other required utilities on a timely and economic basis;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------



| |  |  | outbreaks of contagious diseases, including but not limited to severe acute respiratory syndrome, avian flu, swine flu and Zika virus;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------



| |  |  | environmental events, such as fires and earthquakes, or industrial accidents; and
| | - |  | ---------------------------------------------------------------------------------



| |  |  | technological changes.
| | - |  | ----------------------



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Due to the factors noted above and other risks discussed in this section, many of which are
beyond our control, you should not rely on quarter-to-quarter comparisons to predict our future performance. Unfavorable changes in any of the above factors may seriously harm our business, financial condition and results of operations. In addition,
our operating results may be below the expectations of public market analysts and investors in some future periods. In this event, the price of the common shares or ADSs may underperform or fall.

A decrease in demand for or selling prices of communication devices, consumer electronics and computer goods may decrease the demand for our services
and reduce our margins.

Our customers generally use the semiconductors produced in our fabs in a wide variety of applications. We
derive a significant percentage of our operating revenues from customers who use our manufacturing services to make semiconductors for communication devices, consumer electronics, PCs and other computers. The semiconductor industry experienced
several downturns due to recent major financial crises and natural disasters. These downturns resulted in a reduced demand for our services and hence decreased our revenues and earnings. Any significant decrease in the demand for communication
devices, consumer electronics, PCs or other computers may further decrease the demand for our services. In addition, if the average selling price of communication devices, consumer electronics, PCs or other computers decline significantly, we will
be pressured to further reduce our selling prices, which may reduce our revenues and, therefore, reduce our margins significantly. As demonstrated by downturns in demand for high technology products in the past, market conditions can change rapidly,
without apparent warning or advance notice. In such instances, our customers will experience inventory buildup and/or difficulties in selling their products and, in turn, will reduce or cancel orders for wafers from us. The timing, severity and
recovery of these downturns cannot be predicted accurately or at all. When they occur, our business, profitability and price of the common shares and ADSs are likely to suffer.

Overcapacity in the semiconductor industry may reduce our revenues, earnings and margins.

The prices that we can charge our customers for our services are significantly related to the overall worldwide supply of integrated circuits
and semiconductor products. The overall supply of semiconductor products is based in part on the capacity of other companies, which is outside of our control. For example, in light of the current market conditions, some companies, including our
largest competitors, have announced plans to increase capacity expenditures significantly. We believe such plans, if carried out as planned, will increase the industry-wide capacity and are likely to result in overcapacity in the future. In periods
of overcapacity, if we are unable to offset the adverse effects of overcapacity through, among other things, our technology and product mix, we may have to lower the prices we charge our customers for our services and/or we may have to operate at
significantly less than full capacity. Such actions could reduce our margin and weaken our financial condition and results of operations. We cannot give any assurance that an increase in the demand for foundry services in the future will not lead to
overcapacity in the near future, which could materially adversely affect our revenues, earnings and margins.

Any problem in the semiconductor
outsourcing infrastructure can adversely affect our net operating revenues and profitability.

Many of our customers depend on
third parties to provide mask tooling, assembly and test services. If these customers cannot timely obtain these services on reasonable terms, they may not order any foundry services from us. This may significantly reduce our net operating revenues
and negatively affect our profitability.

We may be unable to implement new technologies as they become available, which may result in the decrease
of our profitability and the loss of customers and market share.

The semiconductor industry is developing rapidly and the related
technology is constantly evolving. If we do not anticipate the technology evolution and rapidly adopt new and innovative technology, we may not be able to produce sufficiently advanced services at competitive prices. There is a risk that our
competitors may adopt new technology before we do, resulting in our loss of market share. If we are unable to begin offering advanced services and processes on a competitive and timely basis, we may lose customers to our competitors providing
similar technologies, which may cause our net operating revenues to decline unless we can replace lost customers with new customers. In addition, the market prices for advanced technology and services tend to fall over time. As a result, if we are
unable to offer new advanced services and processes on a competitive and timely basis, we need to decrease the prices that we set for our existing services and processes, which would have a negative effect on our profitability. We also depend
upon the introduction of new technologies on a timely basis in order to benefit from the relatively higher prices such new technologies offer in the earlier stages of their life cycles. If we are unable to introduce new technologies on a timely and
competitive basis, we may not be able to benefit from the relatively higher prices for new technologies, and our average selling price and profits would decrease accordingly.



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We may be unable to provide leading technology to our customers if we lose the support of our technology
partners.

Enhancing our manufacturing process technologies is critical to our ability to provide services for our customers. We
intend to continue to advance our process technologies through internal research and development and alliances with other companies. Although we have an internal research and development team focused on developing new and improved semiconductor
manufacturing process technologies, we are also dependent on some of our technology partners to advance certain process technology portfolios. In addition, we currently have patent cross-licensing agreements with several companies, including
International Business Machines Corporation, or IBM. Some mask and equipment vendors also supply our technology development teams with masks and equipment needed to develop more advanced processing technologies. If we are unable to continue any of
our joint development arrangements, patent cross-licensing agreements and other agreements, on mutually beneficial economic terms, if we re-evaluate the technological and economic benefits of such relationships, if we are unable to enter into new
technology alliances and arrangements with other leading and specialty semiconductor companies, or if we fail to secure masks and equipment from our vendors in a timely manner sufficient to support our ongoing technology development, we may be
unable to continue providing our customers with leading edge mass-producible process technologies and may, as a result, lose important customers, which would have a materially adverse effect on our businesses, results of operations and financial
condition.

In addition, some of our customers rely upon third-party vendors, or intellectual property vendors, for the intellectual
property they embed into their designs. Although we work and collaborate with intellectual property vendors with respect to such matters, there can be no guarantee that we will be successful or that the vendors will deliver according to our
requirements or the needs of our customers. Failures to meet the targets or to deliver on a timely basis could cause customers to cancel orders and/or shift capacity to other suppliers.

Our business may suffer if we cannot compete successfully in our industry.

The worldwide semiconductor foundry industry is highly competitive. We compete with dedicated foundry service providers such as Taiwan
Semiconductor Manufacturing Company Limited, Semiconductor Manufacturing International (Shanghai) Corporation and Globalfoundries Inc., as well as the foundry operation services of some integrated device manufacturers, such as IBM, Intel, Samsung
Electronics, or Samsung, and Toshiba Corporation, or Toshiba. Integrated device manufacturers principally manufacture and sell their own proprietary semiconductor products, but may also offer foundry services. Other competitors such as DongbuAnam
Semiconductor, Grace Semiconductor Manufacturing Corp., X-FAB Semiconductors Foundries AG and Silterra Malaysia Sdn. Bhd. have initiated efforts to expand and develop substantial additional foundry capacity. New entrants and consolidations in the
foundry business, such as the acquisition of Chartered Semiconductor by Globalfoundries in 2009, are likely to initiate a trend of competitive pricing and create potential overcapacity in legacy technology. Some of our competitors have greater
access to capital and substantially greater production, research and development, marketing and other resources than we do. As a result, these companies may be able to compete more aggressively over a longer period of time than we can.

The principal elements of competition in the wafer foundry market include:



| |  |  | technical competence;
| | - |  | ---------------------



| |  |  | time-to-volume production and cycle time;
| | - |  | -----------------------------------------



| |  |  | time-to-market;
| | - |  | ---------------



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##### Table of Contents

| |  |  | research and development quality;
| | - |  | ---------------------------------



| |  |  | available capacity;
| | - |  | -------------------



| |  |  | manufacturing yields;
| | - |  | ---------------------



| |  |  | customer service and design support;
| | - |  | ------------------------------------



| |  |  | price;
| | - |  | ------



| |  |  | management expertise; and
| | - |  | -------------------------



| |  |  | strategic alliances.
| | - |  | --------------------

Our ability to compete successfully also depends on factors partially
outside of our control, including product availability, intellectual property, including cell libraries that our customers embed in their product designs, and industry and general economic trends.

We may not be able to implement our planned growth if we are unable to obtain the financing necessary to fund the substantial capital expenditures we
expect to incur.

Our business and the nature of our industry require us to make substantial capital expenditures leading to a
high level of fixed costs. The costs of facilities, tools and equipment to make semiconductors with advanced technology continue to rise, with each generation typically significantly more expensive than the larger-in-size more mature technologies
which preceded. We expect to incur significant capital expenditures in connection with our growth plans. These capital expenditures will be made in advance of any additional sales to be generated by new or upgraded fabs as a result of these
expenditures. Given the fixed-cost nature of our business, we have in the past incurred, and may in the future incur, operating losses if our revenues do not adequately offset our capital expenditures. Additionally, our actual expenditures may
exceed our planned expenditures for a variety of reasons, including changes in:



| |  |  | our growth plan;
| | - |  | ----------------



| |  |  | our process technology;
| | - |  | -----------------------



| |  |  | our research and development efforts and patent license arrangements;
| | - |  | ---------------------------------------------------------------------



| |  |  | market conditions;
| | - |  | ------------------



| |  |  | interest rates;
| | - |  | ---------------



| |  |  | exchange rate fluctuations; and
| | - |  | -------------------------------



| |  |  | prices of equipment.
| | - |  | --------------------

We cannot assure you that additional financing will be available on
satisfactory terms, if at all. If adequate funds are not available on satisfactory terms, we may be forced to curtail our expansion plans or delay the deployment of our services, which could result in a loss of customers and limit the growth of our
business.

We depend on a small number of customers for a significant portion of our net operating revenues and any loss of these customers would
result in significant declines in our net operating revenues.

We have been largely dependent on a small number of customers for a
substantial portion of our business. In 2015, our top ten customers accounted for 57.3% of our net operating revenues. We expect that we will continue to depend upon a relatively limited number of customers for a significant portion of our net
operating revenues. We cannot assure you that our net operating revenues generated from these customers, individually or in the aggregate, will reach or exceed historical levels in any future period. Loss or cancellation of business from significant
changes in scheduled deliveries to, or decreases in the prices of services sold to any of these customers could significantly reduce our net operating revenues.



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##### Table of Contents

Our customers generally do not place purchase orders far in advance, which makes it difficult for
us to predict our future revenues, adjust production costs and allocate capacity efficiently on a timely basis. In addition, due to the cyclical nature of the semiconductor industry, our customers purchase orders have varied significantly from
period to period. As a result, we do not typically operate with any significant backlog, except in periods of extreme capacity shortage such as that experienced in late 2009 and early 2010. The lack of significant backlog and the unpredictable
length and timing of semiconductor cycles make it difficult for us to forecast our revenues in future periods. Moreover, our expense levels are based in part on our expectations of future revenues, and we may be unable to adjust costs in a timely
manner to compensate for revenue shortfalls. We expect that in the future our net operating revenues in any quarter will continue to be substantially dependent upon purchase orders received in that quarter.

Moreover, the increasing trend in mergers and acquisitions activities in the semiconductor industry could decrease total available customer
base, which could potentially result in a loss of customers.

Our inability to obtain, preserve and defend intellectual property rights could harm
our competitive position.

Our ability to compete successfully and achieve future growth will depend, in part, on our ability to
protect our proprietary technology and to secure critical processing technology that we do not own at commercially reasonable terms. We cannot assure you that in the future we will be able to independently develop, or secure from any third party,
the technology required for upgrading our production facilities or for meeting our customer needs. Our failure to successfully obtain such technology may seriously harm our competitive position.

Our ability to compete successfully also depends on our ability to operate without infringing on the proprietary rights of others. We have no
means of knowing what patent applications have been filed in the United States or in certain other countries until months after they are filed. The semiconductor industry, because of the complexity of the technology used and the multitude of
patents, copyrights and other overlapping intellectual property rights, is characterized by frequent litigation regarding patent, trade secret and other intellectual property rights. It is common for patent owners to assert their patents against
semiconductor manufacturers. We have received from time to time communications from third parties asserting patents that cover certain of our technologies and alleging infringement of intellectual property rights of others, and we expect to continue
to receive such communications in the future. See Item 4. Information on the CompanyB. Business OverviewLitigation for more details of our ongoing litigation. In the event any third party was to make a valid claim against us
or against our customers, we could be required to:



| |  |  | seek to acquire licenses to the infringed technology which may not be available on commercially reasonable terms, if at all;
| | - |  | ----------------------------------------------------------------------------------------------------------------------------



| |  |  | discontinue using certain process technologies, which could cause us to stop manufacturing certain semiconductors;
| | - |  | ------------------------------------------------------------------------------------------------------------------



| |  |  | pay substantial monetary damages; and/or
| | - |  | ----------------------------------------



| |  |  | seek to develop non-infringing technologies, which may not be feasible.
| | - |  | -----------------------------------------------------------------------

Any one of these
developments could place substantial financial and administrative burdens on us and hinder our business. Litigation, which could result in substantial expenses for us and diversion of our resources, may also be necessary to enforce our patents or
other intellectual property rights or to defend us or our customers against claimed infringement of the rights of others. If we fail to obtain necessary licenses or if litigation relating to patent infringement or other intellectual property matters
occurs, it could hurt our reputation as a technology leader in our industry and prevent us from manufacturing particular products or applying particular technologies, which could reduce opportunities to generate revenues.



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Our operations and business will suffer if we lose one or more of our key personnel without adequate
replacements.

Our future success to a large extent depends on the continued services of our Chairman and key executive officers.
We do not carry key person insurance on any of our personnel. If we lose the services of any of our Chairman or key executive officers, it could be difficult to find and integrate replacement personnel in a short period of time, which could harm our
operations and the growth of our business.

We may have difficulty attracting and retaining skilled employees, who are critical to our future
success.

The success of our business depends upon attracting and retaining experienced executives, engineers and other employees
to implement our strategy. The competition for skilled employees is intense. We expect demand for personnel in Taiwan to increase in the future as new wafer fabrication facilities and other businesses are established in Taiwan. We also expect demand
for experienced personnel in other locations to increase significantly as our competitors establish and expand their operations. Some of our competitors are willing to offer better compensation than that we do to our executives, engineers and other
employees. We do not have long-term employment contracts with any of our employees. If we were unable to retain our existing personnel or attract, assimilate and recruit new experienced personnel in the future, it could seriously disrupt our
operations and delay or restrict the growth of our business.

Our transactions with affiliates and stockholders may hurt our profitability and
competitive position.

We have provided foundry services to several of our affiliates and stockholders. We currently do not
provide any preferential treatment to any of these affiliates and stockholders. However, we may in the future reserve or allocate our production capacity to these companies if there is a shortage of foundry services in the market to enable these
companies to maintain their operations and/or to protect our investments in them. This reservation or allocation may reduce our capacity available for our other customers, which may damage our relationships with other customers and discourage them
from using our services. This may hurt our profitability and competitive position.

If we fail to maintain an effective system of internal control
over financial reporting, we may be unable to accurately report our financial results or prevent fraud, and investor confidence in our company may be adversely affected.

We are required to comply with the R.O.C and the U.S. securities laws and regulations in connection with internal controls. As a public
company in the United States, our management is required to assess the effectiveness of our internal control over financial reporting using the criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring
Organizations of the Treadway Commission (2013 framework), or the COSO criteria, as required by Section 404 of the Sarbanes-Oxley Act of 2002.

However, although effective internal controls can provide reasonable assurance with respect to the preparation and fair presentation of
financial statements, they may not prevent or detect misstatements because of their inherent limitations, including the possibility of human error, the circumvention or overriding of controls, fraud or corruption. If we fail to maintain the adequacy
of our internal controls, our business and operating results could be harmed, we could fail to meet our reporting obligations, and there could be a material adverse effect on the market price of our common shares and ADSs.

The trend of adopting protectionist measures in certain countries, including the United States, could have a material adverse impact on our results of
operations and financial condition.

Governments in the United States, PRC and certain other countries have implemented fiscal and
monetary programs to stimulate economic growth as a result of the recent economic downturn, and many of these programs include protectionist measures that encourage the use of domestic products and labor. Recent policy developments by the
governments in China and elsewhere also suggest an increased unwillingness to allow international companies to invest in or acquire local businesses. Since many of our direct customers and other downstream customers in the supply chain are located
in or have operations in the countries where protectionist measures were adopted, such protectionist measures may have a material adverse effect on demand for our manufacturing services.



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Any future outbreak of contagious diseases may materially and adversely affect our business and operations,
as well as our financial condition and results of operations.

Any future outbreak of contagious diseases, including but not
limited to Zika virus, Ebola virus, avian or swine influenza or severe acute respiratory syndrome, may disrupt our ability to adequately staff our business and may generally disrupt our operations. If any of our employees is suspected of having
contracted any contagious disease, we may under certain circumstances be required to quarantine such employees and the affected areas of our premises. Therefore, we may have to temporarily suspend part of or all of our operations. Furthermore, any
future outbreak may restrict the level of economic activities in affected regions, including Taiwan, and affect the willingness and ability of our employees and customers to travel, which may also adversely affect our business and prospects. As a
result, we cannot assure you that any future outbreak of contagious diseases would not have a material adverse effect on our financial condition and results of operations.

Currency fluctuations could increase our costs relative to our revenues, which could adversely affect our profitability.

More than half of our net operating revenues are denominated in currencies other than New Taiwan dollars, primarily in U.S. dollars. On the
other hand, more than half of our costs of direct labor, raw materials and overhead are incurred in New Taiwan dollars. Although we hedge a portion of the resulting net foreign exchange position through the use of foreign exchange spot transactions,
or currency forward contracts, we are still affected by fluctuations in foreign exchange rates among the U.S. dollar, the New Taiwan dollar and other currencies. Any significant fluctuation in exchange rates may impact on our financial condition and
the U.S. dollar value of the ADSs and the U.S. dollar value of any cash dividends we distributed, which could have a corresponding effect on the market price of the ADSs.

Risks Relating to Manufacturing

Our manufacturing
processes are highly complex, costly and potentially vulnerable to impurities and other disruptions that can significantly increase our costs and delay product shipments to our customers.

Our manufacturing processes are highly complex, require advanced and costly equipment and are continuously being modified to improve
manufacturing yields and product performance. Impurities or other difficulties in the manufacturing process or defects with respect to equipment or supporting facilities can lower manufacturing yields, interrupt production or result in losses of
products in process. As system complexity has increased and process technology has become more advanced, manufacturing tolerances have been reduced and requirements for precision have become even more demanding. Although we have been enhancing our
manufacturing capabilities and efficiency, from time to time we have experienced production difficulties that have caused delivery delays and quality control problems, as is common in the semiconductor industry. In the past we have encountered the
following problems:



| |  |  | capacity constraints due to changes in product mix or the delayed delivery of equipment critical to our production, including scanners, steppers and chemical stations;
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | construction delays during expansions of our clean rooms and other facilities;
| | - |  | ------------------------------------------------------------------------------



| |  |  | difficulties in upgrading or expanding existing facilities;
| | - |  | -----------------------------------------------------------



| |  |  | manufacturing execution system or automatic transportation system failure;
| | - |  | --------------------------------------------------------------------------



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| |  |  | unexpected breakdowns in our manufacturing equipment and/or related facilities;
| | - |  | -------------------------------------------------------------------------------



| |  |  | changing or upgrading our process technologies;
| | - |  | -----------------------------------------------



| |  |  | raw materials shortages and impurities; and
| | - |  | -------------------------------------------



| |  |  | delays in delivery and shortages of spare parts and in maintenance for our equipment and tools.
| | - |  | -----------------------------------------------------------------------------------------------

Should these problems repeat, we may suffer delays in delivery and/or loss of business and revenues. In addition, we cannot guarantee that we
will be able to increase our manufacturing capacity and efficiency in the future to the same extent as in the past.

Our profit margin may
substantially decline if we are unable to continuously improve our manufacturing yields, maintain high capacity utilization and optimize the technology mix of our silicon wafer production.

Our ability to maintain our profitability depends, in part, on our ability to:



| |  |  | maintain high capacity utilization, which is defined as the ratio of the wafer-out quantity of 8-inch wafer equivalents divided by our estimated total 8-inch equivalent capacity in a specified period. The estimated
capacity figures may vary depending upon equipment delivery schedules, pace of migration to more advanced processing technologies and other factors affecting production ramp-ups;
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | maintain or improve our manufacturing yields, which is defined as the percentage of usable devices manufactured on a wafer; and
| | - |  | -------------------------------------------------------------------------------------------------------------------------------



| |  |  | optimize the technology mix of our production by increasing the number of wafers manufactured by utilizing different processing technologies.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------

Our manufacturing yields directly affect our ability to attract and retain customers, as well as the price of our services. Our capacity
utilization affects our operating results because a large percentage of our operating costs are fixed. Our technology mix affects utilization of our equipment and process technologies, as well as the prices we can charge, either of which can affect
our margins. If we are unable to continuously improve our manufacturing yields, maintain high capacity utilization or optimize the technology mix of our wafer production, our profit margin may substantially decline.

We may have difficulty in ramping up production in accordance with our schedule, which could cause delays in product deliveries and decreases in
manufacturing yields.

As is common in the semiconductor industry, we have from time to time experienced difficulties in ramping
up production at new or existing facilities or effecting transitions to new manufacturing processes. As a result, we have suffered delays in product deliveries or reduced manufacturing yields. We may encounter similar difficulties in connection
with:



| |  |  | the migration to more advanced process technologies, such as 45/40 and 28-nanometer and more advanced process technology;
| | - |  | -------------------------------------------------------------------------------------------------------------------------



| |  |  | the joint development with vendors for more powerful tools (both in production and inspection) needed in the future to meet advanced process technology requirements; and
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | the adoption of new materials in our manufacturing processes.
| | - |  | -------------------------------------------------------------

We may face construction
delays, interruptions, infrastructure failure and delays in upgrading or expanding existing facilities, or changing our process technologies, any of which might adversely affect our production schedule. Our failure to achieve our production schedule
could delay the time required to recover our investments and seriously affect our profitability.



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Our production schedules could be delayed and we may lose customers if we are unable to obtain raw
materials and equipment in a timely manner.

We depend on our suppliers for raw materials. To maintain competitive manufacturing
operations, we must obtain from our suppliers, in a timely manner, sufficient quantities of quality materials at acceptable prices. Although we source our raw materials from several suppliers, a small number of these suppliers account for a
substantial amount of our supply of raw materials because of the consistent quality of their products. For example, in 2014 and 2015, we purchased a majority of our silicon wafers from five makers, Shin-Etsu Handotai Corporation, or Shin-Etsu,
Siltronic AG, SunEdison Corporation, Sumco Group (including Sumco Corporation and Formosa Sumco Technology Corporation) and GlobalWafers. We may have long-term contracts with most of our suppliers if necessary. From time to time, our suppliers have
extended lead time or limited the supply of required materials to us because of capacity constraints. Consequently, from time to time, we have experienced difficulty in obtaining the quantities of raw materials we need on a timely basis.

In addition, from time to time we may reject materials that do not meet our specifications, resulting in declines in output or manufacturing
yields. We cannot assure you that we will be able to obtain sufficient quantities of raw materials and other supplies in a timely manner. If the supply of materials is substantially diminished or if there are significant increases in the costs of
raw materials, we may be forced to incur additional costs to acquire sufficient quantities of raw materials to sustain our operations, which may increase our marginal costs and reduce profitability.

We also depend on a limited number of manufacturers and vendors that make and maintain the complex equipment we use in our manufacturing
processes. We also rely on these manufacturers and vendors to improve our technology to meet our customers demands as technology improves. In periods of unpredictable and highly diversified market demand, the lead time from order to delivery
of this equipment can be as long as six to twelve months. If there are delays in the delivery of equipment or in the availability or performance of necessary maintenance, or if there are increases in the cost of equipment, it could cause us to delay
our introduction of new manufacturing capacity or technologies and delay product deliveries, which may result in the loss of customers and revenues.

We may be subject to the risk of loss due to fire because the materials we use in our manufacturing processes are highly flammable.

We use highly flammable materials such as silane and hydrogen in our manufacturing processes and may therefore be subject to the risk of loss
arising from fires. The risk of fire associated with these materials cannot be completely eliminated. We maintain insurance policies to reduce losses caused by fire, including business interruption insurance. While we believe that our insurance
coverage for damage to our property and business interruption due to fire is consistent with semiconductor industry practice, our insurance coverage is subject to deductibles and self-insured retention and may not be sufficient to cover all of our
potential losses. If any of our fabs were to be damaged or cease operations as a result of a fire, it would temporarily reduce manufacturing capacity and reduce revenues.

We and many of our customers and suppliers are vulnerable to natural disasters and other events outside of our control, which may seriously disrupt our
operations.

Most of our assets and many of our customers and suppliers are located in certain parts of Taiwan. Our operations and
the operations of our customers and suppliers are vulnerable to earthquakes, floods, droughts, power losses and similar events that affect the locations of our operations. The occurrence of any of these events could interrupt our services and cause
severe damages to wafers in process, or cause significant business interruptions. Although we maintain property damage and business interruption insurance for such risks, there is no guarantee that future damages or business loss from earthquakes
will be covered by such insurance, that we will be able to collect from our insurance carriers, should we choose to claim under our insurance policies, or that such coverage will be sufficient. In addition, our manufacturing facilities have
occasionally experienced insufficient power supplies, and our operations have been disrupted.



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Our operations may be delayed or interrupted and our business could suffer if we violate environmental,
safety and health, or ESH, regulations.

The semiconductor manufacturing process requires the use of various gases, chemicals,
hazardous materials and other substances such as solvents and sulfuric acid which may have an impact on the environment. We are always subject to ESH regulations, and a failure to manage the use, storage, transportation, emission, discharge,
recycling or disposal of raw materials or to comply with these ESH regulations could result in (i) regulatory penalties, fines and other legal liabilities, (ii) suspension of production or delays in operation and capacity expansion, (iii) a decrease
in our sales, (iv) an increase in pollution cleaning fees and other operation costs, or (v) damage to our public image, any of which could harm our business. In addition, as ESH regulations are becoming more comprehensive and stringent, we may incur
a greater amount of capital expenditures in technology innovation and materials substitution in order to comply with such regulations, which may adversely affect our results of operations.

Climate change may negatively affect our business.

There is increasing concern that climate change is occurring and may have dramatic effects on human activity without aggressive remediation
steps. A modest change in temperature would result in increased coastal flooding, changing precipitation patterns and increasing risk of extinction for the worlds species. Public expectations for reductions in greenhouse gas emissions could
result in increased energy, transportation and raw material costs.

Scientific examination of, political attention to and rules and
regulations on issues surrounding the existence and extent of climate change may result in an increase in the cost of production due to increase in the prices of energy and introduction of energy or carbon tax. Various regulatory developments have
been introduced that focus on restricting or managing emissions of carbon dioxide, methane and other greenhouse gases. Enterprises may need to purchase at higher costs emission credits, new equipment or raw materials with lower carbon footprints.
These developments and further legislation that is likely to be enacted could affect our operations negatively. Changes in environmental regulations, such those on the use of perfluorinated compounds, could increase our production costs, which could
adversely affect our results of operation and financial condition.

In addition, more frequent droughts and floods, extreme weather
conditions and rising sea levels could occur due to climate change. The impact of such changes could be significant as most of our factories are located in islands including Taiwan, Singapore and Xiamen in Fujian Province in China. For example,
transportation suspension caused by extreme weather conditions could harm the distribution of our products. Similarly, our operations depend upon adequate supplies of water, and extended or serious droughts may affect our ability to obtain adequate
supplies of water and threaten our production. We cannot predict the economic impact, if any, of disasters or climate change.

Disruptions in the
international trading environment may seriously decrease our international sales.

A substantial portion of our net operating
revenues is derived from sales to customers located in countries other than the countries where our fabs are located. In 2013, we operated fabs in Taiwan, Singapore, Japan and China. In 2014 and 2015, we operated fabs in Taiwan, Singapore and China.
For the years ended December 31, 2013, 2014 and 2015, we generated approximately 30.1%, 42.6% and 47.5% of our net operating revenues, respectively, from other than the countries where our fabs are located. We expect sales to customers from
countries outside of Taiwan, Singapore and China will continue to represent a significant portion of our net operating revenues. The success and profitability of our international activities depend on certain factors beyond our control, such as
general economic conditions, labor conditions, political stability, tax laws, import duties and foreign exchange controls of the countries in which we sell our products, and the political and economic relationships between these countries. As a
result, our manufacturing services will continue to be vulnerable to disruptions in the international trading environment, including adverse changes in foreign government regulations, political unrest and international economic downturns.



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These disruptions in the international trading environment affect the demand for our
manufacturing services and change the terms upon which we provide our manufacturing services overseas, which could seriously decrease our international sales.

Political, Economic and Regulatory Risks

We face
substantial political risks associated with doing business in Taiwan, particularly due to the tense relationship between the R.O.C. and the Peoples Republic of China, or the PRC, that could negatively affect the value of your investment.

Our principal executive offices and most of our assets and operations are located in Taiwan. Accordingly, our business, financial
condition and results of operations and the market price of our common shares and the ADSs may be affected by changes in R.O.C. governmental policies, taxation, inflation or interest rates and by social instability and diplomatic and social
developments in or affecting Taiwan which are outside of our control. Taiwan has a unique international political status. Since 1949, Taiwan and the Chinese mainland have been separately governed. The PRC claims that it is the sole government in
China and that Taiwan is part of China. Although significant economic and cultural relations have been established between the R.O.C. and the PRC in the past few years, such as the adoption of the Economic Cooperation Framework Agreement and
memorandum regarding cross-strait financial supervision, we cannot assure you that relations between the R.O.C. and PRC will not become strained again. For example, the PRC government has refused to renounce the use of military force to gain control
over Taiwan and, in March 2005, passed an Anti-Secession Law that authorized non-peaceful means and other necessary measures should Taiwan move to gain independence from the PRC. Past developments in relations between the R.O.C. and the PRC have on
occasions depressed the market prices of the securities of companies in the R.O.C. Such initiatives and actions are commonly viewed as having a detrimental effect to reunification efforts between the R.O.C. and the PRC. Relations between the R.O.C.
and the PRC and other factors affecting military, political or economic conditions in Taiwan could materially and adversely affect our financial condition and results of operations, as well as the market price and the liquidity of our securities.

Our business depends on the support of the R.O.C. government, and a decrease in this support may increase our labor costs and decrease our income
after tax.

The R.O.C. government has been very supportive of technology companies. For instance, the R.O.C.s labor laws and
regulations permit employees of semiconductor companies to work shifts of 10 hours each day on a two-days-on, two-days-off basis and do not require these employees to be unionized. We cannot assure you, however, that these labor laws and regulations
will not be changed adversely against us in the future.

We, like many R.O.C. technology companies, have benefited from substantial tax
incentives provided by the R.O.C. government. Among the incentives broadly enjoyed by R.O.C. technology companies, various tax benefits granted under Chapter 2 and Article 70-1 of the Statute for Upgrading Industries expired on December 31, 2009.
Despite the fact that we can still enjoy the tax holidays for the relevant investment plans approved by R.O.C. tax authority until 2020 under the grandfather clause of the Statute for Upgrading Industries, if more incentives are curtailed or
eliminated, our net income may decrease significantly.

Our future tax obligations may adversely affect our profitability.

The R.O.C. government enacted the R.O.C. Income Basic Tax Act, also known as the Alternative Minimum Tax Act, or the AMT Act,
which became effective on January 1, 2006 to impose an alternative minimum tax and to remedy the currently excessive tax incentives for individuals and businesses. Alternative minimum tax, or AMT, is a supplemental tax which is payable if the income
tax payable pursuant to the R.O.C. Income Tax Act is below the minimum amount prescribed under the AMT Act. For the purpose of calculating the AMT, the taxable income defined under the AMT Act includes most income that is exempted from income tax
under various legislations, such as those providing tax holidays and investment tax credits.

For businesses, the income that previously
enjoyed tax-exemption privileges under relevant tax regulations, such as Act for the Establishment and Administration of the Science Parks and Statute for Upgrading Industries, will be subject to the AMT system for the calculation of business
taxpayers aggregate incomes. The AMT rate for business entities was 10% prior to 2013 and has increased to 12% since 2013. Under the AMT Act, a company will be subject to a 12% AMT if its annual taxable income under the Statute exceeds NT$0.5
million. However, the AMT Act grandfathered certain tax exemptions granted prior to the enactment of the AMT. For example, businesses who already qualified for five-year tax holidays and obtained the applicable permission issued by the competent
authority before December 31, 2005 may continue to enjoy such tax incentives, and the income exempted thereunder will not to be added to the taxable income for calculating the AMT, so long as the construction of their investment projects breaks
ground within one year from January 1, 2006 and was completed within three years from the day immediately following their receipts of the applicable permission issued by the competent authority. As the tax exemption periods expire or in the event of
an increase in other taxable income subject to the AMT Act, it may adversely impact our net income after tax.



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Compliance with laws such as the U.S. Conflict Minerals Law may affect our ability or the ability of our
suppliers to purchase raw materials at an effective cost.

Many industries rely on materials which are subject to regulations
concerning certain minerals sourced from the Democratic Republic of Congo, or the DRC, or adjoining countries, including: Sudan; Uganda; Rwanda; Burundi; United Republic of Tanzania; Zambia; Angola; Congo; and Central African Republic. These
minerals are commonly referred to as conflict minerals. Conflict minerals which may be used in our industry or by our suppliers include Columbite-tantalite (derivative of tantalum [Ta]), Cassiterite (derivative of tin [Sn]), gold [Au], Wolframite
(derivative of tungsten [W]), and Cobalt [Co]. Under present U.S. regulations, we and our customers are required to survey and disclose whether our processes or products use or rely on conflict materials. On August 22, 2012, the U.S. SEC adopted the
final rule for disclosing the use of conflict minerals that require companies similar to us to make a report in a type and format similar to Form SD to disclose the use of conflict materials on an annual basis on or prior to May 31 each year.
Our first report was filed on May 31, 2014. In order to comply with the aforementioned rules and regulations promulgated by the U.S. SEC, we will continue to verify the relevant information with our vendors and file the required report. Although we
expect that we and our vendors will be able to comply with the requirements of the U.S. Conflict Minerals law and any new related regulations promulgated by the U.S. SEC, we cannot assure you that we will be able to gather all the information
required to comply with such regulations. While we believe our suppliers do not rely on such conflict materials, we cannot assure you that we will continue to be able to obtain adequate supplies of materials needed in our production from supply
chains outside the DRC and adjoining countries. The failure to obtain necessary information or to maintain adequate supplies of materials from supply chains outside the DRC and adjoining countries may delay our production, increasing the risk of
losing customers and business.

Similarly, many jurisdictions have promulgated regulations with the intention to deter disregard and
contempt for human rights within supply chains. Although our own operations comply with the relevant requirements under the laws of the jurisdictions where we have operations, possible violation by our suppliers may not be known to us and beyond our
control. While we believe our suppliers comply with applicable human rights requirements, there can be no guarantee that they will continue to do so, or that we will be able to obtain the necessary information on their activities to comply with
whatever future requirements may be enacted.

Data security and data privacy considerations and regulations may adversely affect our operations.

Our operations depend upon reliable and uninterrupted information technology services, including the integrity of our web-based
and electronic customer service systems. Although we have put in place what we believe are reasonable precautions to prevent accidental and/or malicious disruption of these services, there can be no assurance that our preventive measures will
preclude failure of the information technology, web-based and electronic customer service systems upon which our business depends. Disruption of these systems could adversely affect our ability to manufacture and to serve our customers.

In addition, in the course of our operations, we receive confidential information from and about our customers, vendors, partners and
employees. Although we take what we believe are reasonable precautions to protect such information from disclosure to or interruption, there are no guarantees our precautions will prevent accidental or malicious access to such information. In the
event of such access, our reputation could be adversely affected, customers and others may hesitate to entrust us with their confidential information, which would negatively affect our operations, and we would incur costs to remedy the breach.



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Moreover, many jurisdictions have proposed regulations concerning data privacy. Although we have
taken measures to comply with existing law and regulations in this regard, future laws may impose requirements that make our operations more expensive and/or less efficient. In addition, should we experience a breakdown in our systems or failure in
our precautions that results in a violation of such regulations, we may suffer adverse customer reaction and face governmental penalties.

Risks
Related to the Common Shares and ADSs and Our Trading Markets

Restrictions on the ability to deposit common shares into our ADS program may
adversely affect the liquidity and price of the ADSs.

The ability to deposit common shares into our ADS program is restricted by
R.O.C. law. Under current R.O.C. law, no person or entity, including you and us, may deposit common shares into our ADS program without specific approval of the R.O.C. FSC except for the deposit of the common shares into our ADS program and for the
issuance of additional ADSs in connection with:



| | (1) | distribution of share dividends or free distribution of our common shares;
| | --- | --------------------------------------------------------------------------



| | (2) | exercise of the preemptive rights of ADS holders applicable to the common shares evidenced by ADSs in the event of capital increases for cash; or
| | --- | -------------------------------------------------------------------------------------------------------------------------------------------------



| | (3) | delivery of our common shares which are purchased in the domestic market in Taiwan directly by the investor or through the depositary or are already in the possession of the investor to the custodian for deposit into
our ADS program, subject to the following conditions: (a) the re-issuance is permitted under the deposit agreement and custody agreement, (b) the depositary may accept deposit of those common shares and issue the corresponding number of ADSs with
regard to such deposit only if the total number of ADSs outstanding after the issuance does not exceed the number of ADSs previously approved by the R.O.C. FSC, plus any ADSs issued pursuant to the events described in (1) and (2) above and (c) this
deposit may only be made to the extent previously issued ADSs have been withdrawn.
| | --- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

As a result of the limited ability to
deposit common shares into our ADS program, the prevailing market price of our ADSs on the NYSE may differ from the prevailing market price of the equivalent number of our common shares on the Taiwan Stock Exchange.

Holders of our ADSs will not have the same proposal or voting rights as the holders of our common shares, which may affect the value of your investment.

Except for treasury common shares and common shares held by our subsidiaries which meet certain criteria provided under the
R.O.C. Company Act, each common share is generally entitled to one vote and no voting discount will be applied. However, except as described in this annual report and in the deposit agreement, holders of our ADSs will not be able to exercise voting
rights attached to the common shares evidenced by our ADSs on an individual basis. Holders of our ADSs will appoint the depositary or its nominee as their representative to exercise the voting rights attached to the common shares represented by the
ADSs. The voting rights attached to the common shares evidenced by our ADSs must be exercised as to all matters brought to a vote of stockholders collectively in the same manner.

Moreover, holders of the ADSs do not have individual rights to propose any matter for stockholders votes at our stockholders
meetings. However, holders of at least 51% of the ADS outstanding at the relevant record date may request the depositary to submit to us one proposal per year for consideration at our annual ordinary stockholders meeting, provided that such
proposal meets certain submission criteria and limitations, including the language and the length of the proposal, the time of submission, the required certification or undertakings, and the attendance at the annual ordinary stockholders
meeting. A qualified proposal so submitted by the depositary will still be subject to review by our board of directors and there is no assurance that the proposal will be accepted by our board of directors for inclusion in the agenda of our annual
ordinary stockholders meeting. Furthermore, if we determine, at our discretion, that the proposal submitted by the depositary does not qualify, we have no obligation to notify the depositary or to allow the depositary to modify such proposal.



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Furthermore, if holders of at least 51% of the ADSs outstanding at the relevant record date
instruct the depositary to vote in the same manner regarding a resolution, including election of directors, the depositary will appoint our Chairman, or his designee, to represent the ADS holders at the stockholders meetings and to vote the
common shares represented by the ADSs outstanding in the manner so instructed. If by the relevant record date the depositary has not received instructions from holders of ADSs holding at least 51% of the ADSs to vote in the same manner for any
resolution, then the holders will be deemed to have instructed the depositary to authorize and appoint our Chairman, or his designee, to vote all the common shares represented by ADSs at his sole discretion, which may not be in your interest.

The rights of holders of our ADSs to participate in our rights offerings may be limited, which may cause dilution to their holdings.

We may from time to time distribute rights to our stockholders, including rights to acquire our securities. Under the deposit agreement, the
depositary will not offer those rights to ADS holders unless both the rights and the underlying securities to be distributed to ADS holders are either registered under the Securities Act or exempt from registration under the Securities Act. We are
under no obligation to file a registration statement with respect to any such rights or underlying securities or to endeavor to cause such a registration statement to be declared effective. Accordingly, holders of our ADSs may be unable to
participate in our rights offerings and may experience dilution in their holdings.

Changes in exchange controls that restrict your ability to
convert proceeds received from your ownership of ADSs may have an adverse effect on the value of your investment.

Your ability to
convert proceeds received from your ownership of ADSs depends on existing and future exchange control regulations of the Republic of China. Under the current laws of the Republic of China, an ADS holder or the depositary, without obtaining further
approvals from the R.O.C. Central Bank of China, or the CBC, or any other governmental authority or agency of the Republic of China, may convert NT dollars into other currencies, including U.S. dollars, in respect of:



| |  |  | the proceeds of the sale of common shares represented by ADSs or received as share dividends with respect to the common shares and deposited into the depositary receipt facility; and
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | any cash dividends or distributions received from the common shares represented by ADSs.
| | - |  | ----------------------------------------------------------------------------------------

In
addition, the depositary may also convert into NT dollars incoming payments for purchases of common shares for deposit in the depositary receipt facility against the creation of additional ADSs. If you withdraw the common shares underlying your ADSs
and become a holder of our common shares, you may convert into NT dollars subscription payments for rights offerings. The depositary may be required to obtain foreign exchange approval from the CBC on a payment-by-payment basis for conversion from
NT dollars into foreign currencies of the proceeds from the sale of subscription rights of new common shares. Although it is expected that the CBC will grant approval as a routine matter, required approvals may not be obtained in a timely manner, or
at all.

Under the Republic of China Foreign Exchange Control Law, the Executive Yuan of the Republic of China may, without prior notice
but subject to subsequent legislative approval, impose foreign exchange controls or other restrictions in the event of, among other things, a material change in international economic conditions.



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Our public stockholders may have more difficulty protecting their interests than they would as stockholders
of a U.S. corporation.

Our corporate affairs are governed by our articles of incorporation and bylaws governing R.O.C.
corporations. The rights of our stockholders to bring stockholders suits against us or our board of directors under R.O.C. law are much more limited than those of the stockholders of U.S. corporations. Therefore, our public stockholders may
have more difficulty protecting their interests in connection with actions taken by our management, members of our board of directors or controlling stockholders than they would as stockholders of a U.S. corporation. Please refer to Item 10.
Additional InformationB. Memorandum and Articles of AssociationRights to Bring Stockholders Suits included elsewhere in this annual report for a detailed discussion of the rights of our stockholders to bring legal actions
against us or our directors under R.O.C. law.

Holders of our ADSs will be required to appoint several local agents in Taiwan if they withdraw
common shares from our ADS program and become our stockholders, which may make ownership burdensome.

Non-R.O.C. persons wishing
to withdraw common shares represented by their ADSs from our ADS program and hold our common shares represented by those ADSs are required to, among other things, appoint a local agent or representative with qualifications set forth by the
applicable R.O.C. laws and regulations to open a securities trading account with a local brokerage firm, pay R.O.C. taxes, remit funds and exercise stockholders rights. In addition, the withdrawing holders are also required to appoint a
custodian bank or a securities firm with qualifications set forth by the R.O.C. FSC to hold the securities in safekeeping, make confirmations, settle trades and report all relevant information, in which the securities firm is appointed as the
custodian, the payments shall be held in safekeeping in a special account opened in a bank approved by the R.O.C. FSC. Without making this appointment and opening of the accounts, the withdrawing holders would not be able to subsequently sell our
common shares withdrawn from a depositary receipt facility on the Taiwan Stock Exchange. Under R.O.C. law and regulations, except under limited circumstances, PRC persons are not permitted to withdraw the common shares underlying the ADSs or to
register as a stockholder of our company. Under the Regulations Governing Securities Investment and Futures Trading in Taiwan by Mainland Area Investors promulgated by the R.O.C. Executive Yuan on April 30, 2009, as amended, only qualified domestic
institutional investors, or QDIIs and limited entities or individuals, are permitted to withdraw the common shares underlying the ADSs, subject to compliance with the withdrawal relevant requirements, and only QDIIs, and limited entities or
individuals who meet the qualification requirements set forth therein are permitted to own common shares of an R.O.C. company listed for trading on the Taiwan Stock Exchange or the Taipei Exchange, provided that among other restrictions generally
applicable to investments made by PRC persons, their shareholdings are subject to certain restrictions as set forth in the abovementioned regulations and that such mainland area investors shall apply for a separate approval if their investment,
individually or in aggregate, amounts to or exceeds 10 percent of the common shares of any R.O.C. listing company.

You may not be able to enforce a
judgment of a foreign court in the R.O.C.

We are a company limited by shares incorporated under the R.O.C. Company Act. Most of
our assets and most of our directors, executive officers and experts named in the registration statement are located in Taiwan. As a result, it may be difficult for you to enforce judgments obtained outside Taiwan upon us or such persons in Taiwan.
We have been advised by our R.O.C. counsel that any judgment obtained against us in any court outside the R.O.C. arising out of or relating to the ADSs will not be enforced by R.O.C. courts if any of the following situations shall apply to such
final judgment:



| |  |  | the court rendering the judgment does not have jurisdiction over the subject matter according to R.O.C. law;
| | - |  | ------------------------------------------------------------------------------------------------------------



| |  |  | the judgment or the court procedure resulting in the judgment is contrary to the public order or good morals of the R.O.C.;
| | - |  | ---------------------------------------------------------------------------------------------------------------------------



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| |  |  | the judgment was rendered by default, except where the summons or order necessary for the commencement of the action was legally served on us within the jurisdiction of the court rendering the judgment within a
reasonable period of time or with judicial assistance of the R.O.C.; or
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | judgments of the R.O.C. courts are not recognized in the jurisdiction of the court rendering the judgment on a reciprocal basis.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------

We may be considered a passive foreign investment company, which could result in adverse U.S. federal income tax consequences for U.S. investors.

We do not believe that we were a passive foreign investment company, or PFIC, for 2015 and we do not expect to become one in the
future, although there can be no assurance in this regard. Based upon the nature of our business activities, we may be classified as a PFIC for U.S. federal income tax purposes. Such characterization could result in adverse U.S. federal income tax
consequences to you if you are a U.S. investor.

For example, if we are a PFIC, our U.S. investors may become subject to increased tax
liabilities under U.S. federal income tax laws and regulations and will become subject to burdensome reporting requirements. The determination of whether or not we are a PFIC is made on an annual basis and will depend on the composition of our
income and assets from time to time. Specifically, for any taxable year we will be classified as a PFIC for U.S. federal income tax purposes if either (i) 75% or more of our gross income in a taxable year is passive income or (ii) the average
percentage of our assets (which includes cash) by value in a taxable year which produce or are held for the production of passive income is at least 50%. The calculation of the value of our assets will be based, in part, on the quarterly market
value of common shares and ADSs, which is subject to change. In addition, the composition of our income and assets will be affected by how, and how quickly, we spend the cash we have raised in prior offerings. See TaxationU.S. Federal
Income Tax Considerations For U.S. PersonsPassive Foreign Investment Company.

The trading price of the common shares and ADSs may be
adversely affected by the general activities of the Taiwan Stock Exchange and U.S. stock exchanges, the trading price of our common shares, increases in interest rates and the economic performance of Taiwan.

Our common shares are listed on the Taiwan Stock Exchange. The trading price of our ADSs may be affected by the trading price of our common
shares on the Taiwan Stock Exchange and the economic performance of Taiwan. The Taiwan Stock Exchange is smaller and, as a market, more volatile than the securities markets in the United States and some European countries. The Taiwan Stock Exchange
has experienced substantial fluctuations in the prices and volumes of sales of listed securities, and there are currently limits on the range of daily price movements on the Taiwan Stock Exchange. The Taiwan Stock Exchange is particularly volatile
during times of political instability, such as when the relationship between Taiwan and the PRC becomes tense. Moreover, the Taiwan Stock Exchange has experienced disturbance caused by market manipulation, insider trading and payment defaults, and
the government of Taiwan has from time to time intervened in the stock market by purchasing stocks listed on the Taiwan Stock Exchange. The recurrence of these or similar events could deteriorate the price and liquidity of our common shares and
ADSs.

The market price of the ADSs may also be affected by general trading activities on the U.S. stock exchanges, which recently have
experienced significant volatility with respect to trading prices of technology companies. Fluctuation in interest rates and other general economic conditions may also influence the market price of the ADSs.



|ITEM 4. | INFORMATION ON THE COMPANY
|------- | --------------------------



|A. | History and Development of the Company
|-- | --------------------------------------

Our legal and commercial name is United
Microelectronics Corporation, commonly known as UMC. We were incorporated under the R.O.C. Company Law as a company limited by shares in May 1980 and our common shares were listed on the Taiwan Stock Exchange in 1985. Our principal
executive office is located at No. 3 Li-Hsin Road II, Hsinchu Science Park, Hsinchu, Taiwan, Republic of China, and our telephone number is 886-3-578-2258. Our Internet website address is www.umc.com. The information on our website does not form
part of this annual report. Our ADSs have been listed on the NYSE under the symbol UMC since September 19, 2000.



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We are one of the worlds largest independent semiconductor foundries and a leader in
semiconductor manufacturing process technologies. Our primary business is the manufacture, or fabrication, of semiconductors, sometimes called chips or integrated circuits, for others. Using our own proprietary
processes and techniques, we make chips to the design specifications of our many customers. Our company maintains a diversified customer base across industries, including communication devices, consumer electronics, computer, and others, while
continuing to focus on manufacturing for high growth, large volume applications, including networking, telecommunications, internet, multimedia, PCs and graphics. We sell and market mainly wafers which in turn are used in a number of different
applications by our customers. Percentages of our gross wafer sales derived from our products used in communication devices, consumer electronics, computer and other applications were 54.3%, 27.6%, 11.9% and 6.2%, respectively, in 2015.

We focus on the development of leading mass-producible manufacturing process technologies. We were among the first in the foundry industry to
go into commercial operation with such advanced capabilities as producing integrated circuits with line widths of 0.25, 0.18, 0.15, 0.13 micron and 90, 65, 45/40, 28, 14 and 10 nanometer. Advanced technologies have enabled electronic products,
especially in relation to communication, consumer and computer products, to integrate their functions in new and innovative methods. Networking capabilities have allowed electronic products such as computers, tablets, cell phones, televisions, PDAs,
CD-ROMs and digital cameras to communicate with each other to exchange information. More powerful semiconductors are required to drive multimedia functions (e.g., processing visual data) and to resolve network bandwidth issues. At the same time, the
trend toward personal electronic devices has resulted in products that are becoming physically smaller and consume less power. Process technology must also shrink the volumes of products aggressively to cater to this trend of integrating multiple
functions, reducing the size of components needed for operation and lowering IC power consumption. Dedicated semiconductor foundries need to achieve this process improvement and at the same time develop multiple process technologies to satisfy the
varying needs of communication, consumer and computer products. We believe our superior process technologies will enable us to continue to offer our customers significant performance benefits for their products, faster time-to-market production,
cost savings and other competitive advantages.

We provide high quality service based on our performance. In todays marketplace, we
believe it is important to make available not only the most manufacturable processes, but also the best solutions to enable customers to design integrated circuits that include entire systems on a chip. Through these efforts, we intend to be the
foundry solution for SoC customer needs. To achieve this goal, we believe it is necessary to timely develop and offer the intellectual property and design support that customers need to ensure their specific design blocks work with the other design
blocks of the integrated circuit system in the manner intended. Accordingly, we have a dedicated intellectual property and design support team which focuses on timely development of the intellectual property and process specific design blocks our
customers need in order to develop products that operate and perform as intended. Our design service team actively cooperates with our customers and vendors of cell libraries and intellectual property offerings to identify, early in the
product/market cycle, the offerings needed to ensure that these coordinated offerings are available to our customers in silicon verified form in a streamlined and easy-to-use manner. As a result, we are able to ensure the timely delivery of service
offerings from the earliest time in the customer design cycle, resulting in a shorter time-to-volume production. We also provide our customers with real-time online access to their confidential production data, resulting in superior communication
and efficiency. We further address our customers needs using our advanced technology and proven methodology to achieve fast cycle time, high yield, production flexibility and close customer communication. For example, we select and configure
our clean rooms and equipment and develop our processes to maximize the flexibility in meeting and adapting to rapidly changing customer and industry needs. As a result, our cycle time, or the period from customer order to wafer delivery, and our
responsiveness to customer request changes are among the fastest in the dedicated foundry industry. We also provide high quality service and engineering infrastructure.

Our production capacity is comparable to that of certain largest companies in the semiconductor industry, and we believe our leading edge and
high volume capability is a major competitive advantage.



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Our technology and service have attracted two principal types of foundry industry customers:
fabless design companies and integrated device manufacturers. Fabless design companies design, develop and distribute proprietary semiconductor products but do not maintain internal manufacturing capacity. Instead, these companies depend on outside
manufacturing sources. Integrated device manufacturers, in contrast, traditionally have integrated internally all functionsmanufacturing as well as design, development, sales and distribution.

Our primary customers, in terms of our sales revenues, include premier integrated device manufacturers, such as Texas Instruments, Intel
Mobile and STMicroelectronics, and leading fabless design companies, such as Xilinx, Broadcom, MediaTek, Realtek, Qualcomm and Novatek. In 2015, our companys top ten customers accounted for 57.3% of our net operating revenues. We believe our
success in attracting these customers is a direct result of our commitment to high quality service and our intense focus on customer needs and performance.

In addition to our semiconductor foundry business, we also established UMC New Business Investment Corporation to focus on investments in the
solar energy and LED industries.

On March 16, 2011, our board of directors proposed an offer to the stockholders of Best Elite
International Limited, a British Virgin Islands corporation, or Best Elite, to acquire up to an additional 30% equity interest of Best Elite. Hejian Technology (Suzhou) Co., Ltd., or Hejian, is a wholly owned subsidiary of Infoshine Technology
Limited, or Infoshine, which is a wholly owned subsidiary of Best Elite. Hejian engages in the semiconductor foundry business and owns an 8-inch fab in Suzhou, China. We received approval from the Investment Commission, Ministry of Economic Affairs,
Executive Yuan on November 1, 2011, and as of December 31, 2012, we held a 35.03% equity stake in Best Elite, which included the 15.34% equity stake held by the trustee that was originally offered to us in March 2005, plus an additional 19.69%
equity stake that was purchased from shareholders pursuant to the March 2011 offer. As part of our global expansion strategy, we have continued to integrate and increase our ownership of Best Elite since. As of March 31, 2016, our cumulative
ownership in Best Elite was approximately 91.08%. We intend to acquire the remaining outstanding shares in Best Elite for Hejian to become our wholly beneficially owned subsidiary.

We and Alpha Wisdom Limited, or AWL, together held 94.79% of issued and outstanding share capital of UMC Japan, or UMCJ, as of December 31,
2009 and UMCJ then delisted from the Jasdaq Securities Exchange in accordance with its listing rules on March 19, 2010. Since not all of the outstanding equity securities of UMCJ were acquired, we initiated certain squeeze-out procedures as provided
in the Japanese Companies Act. Pursuant to such procedures, as of the end of 2010, we, together with AWL, owned 100% of UMCJ. On May 19, 2011, we acquired the remaining outstanding equity securities of UMCJ from AWL, and AWL filed for liquidation on
August 30, 2011.

On August 21, 2012, our board of directors approved the dissolution and liquidation of UMCJ. We decided to close our
foundry operations in Japan to focus on our manufacturing facilities in Taiwan and Singapore and reduce operating expenses. On November 28, 2013, we sold all our equity securities of UMCJ to Mach Semiconductor Co., Ltd., and, to continuously
serve our Japanese customers, we established UMC Group Japan as our new regional sales hub.

On August 29, 2014, we and Fujitsu
Semiconductor Limited, or Fujitsu, announced an agreement where we invested ¥5 billion as an initial investment and received approximately 9.3% of the issued and outstanding share capital to became a minority shareholder of a newly formed
subsidiary of Fujitsu named Mie Fujitsu Semiconductor Limited, or MIFS, which will operate a 300mm wafer manufacturing facility located in Kuwana, Mie, Japan. On December 16, 2015, our board has further approved the acquisition of additional newly
issued shares of MIFS with an aggregate investment amount of NT$1.36 billion, which increased our ownership interest in MIFS to approximately 15.9%. Through this relationship with us, MIFS will target to expand its business globally as a pure-play
foundry company by strengthening its production and development capacity in a cost competitive manner.



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On October 9, 2014, our board of directors approved an agreement with the Xiamen Municipal
Peoples Government and Fujian Electronics & Information Group to found a new company named United Semiconductor (Xiamen) Co., Ltd., or USC, based in Xiamen, Fujian Province, China that will focus on 12-inch wafer foundry services. We
anticipate that we may invest up to US$1.35 billion in USC over the next five years, with our investment starting in 2015 that will be deployed in installments based on the progress of this company. USC will manufacture 12-inch wafers and initially
offer 40 nanometer and 55 nanometer process technologies. Our participation in USC has complied and will continue to comply with R.O.C. rules and regulations and will continue to be subject to the review and approval by the relevant R.O.C.
authorities. We have obtained the initial investment approval from the R.O.C. government on December 31, 2014. The initial groundbreaking event of USC took place in March 2015. Moreover, Hejian has committed an additional cash investment in USC in
2016. We expect this investment project to mitigate geographical risks and increase our exposure to semiconductor supply chain in China, which allows us to be closer to our customers in China, which, in turn, to provide better services, increase our
manufacturing scale and stimulate revenue growth.

On December 24, 2014, we transferred our 6-inch fabrication plant, or Fab 6A, including
machinery equipment and building facilities to our subsidiary, Wavetek Microelectronics Corporation, or Wavetek, in order to further satisfy customer needs in the fast growing GaAs market and to improve the 6-inch fabrication operational efficiency
among our group by fully utilizing the existing assets and resources. In April 2015, Wavetek had successfully entered into the silicon-based CMOS foundry business after it had fully acquired our 6-inch Fab 6A fixed assets and production lines. As of
March 31, 2016, our shareholdings in Wavetek was approximately 78.5%, making us its largest shareholder.

On December 26, 2014, our
subsidiary, Topcell Solar International Co., Ltd., or Topcell, announced its plans to merge with Motech Industries, Inc., or Motech, through a share exchange transaction. The share exchange conversion was six ordinary shares of Topcell into one
newly-issued ordinary share of Motech. The merger was completed in June 2015 and Motech became the surviving company while Topcell Solar was absorbed. Upon completion of the merger, our share ownership of Motech was approximately 8.8% of its total
issued and outstanding share capital, which made us the second largest shareholder of Motech.

On April 1, 2015, our subsidiary, Wavetek,
completed the merger with Epitron Technology Inc., a Taiwan based GaAs wafer manufacturer. The merger is expected to achieve better operational efficiency that will in turn enhance our competitiveness in the GaAs foundry industry.

Please refer to Item 5. Operating and Financial Review and Prospects-B. Liquidity and Capital Resources for a discussion of our
capital expenditures in the past three years and the plan for the current year.

Our Strategy

To maintain and enhance our position as a market leader, we have adopted a business strategy with a focus on a partnership business model
designed to accommodate our customers business needs and objectives and to promote their interests as our partners. We believe that our success and profitability are inseparable from the success of our customers. The goal in this business
model is to create a network of partnerships or alliances among integrated device manufacturers, intellectual property and design houses, as well as foundry companies. We believe that we and our partners will benefit from the synergy generated
through such long-term partnerships or alliances and the added value to be shared among the partners. The key elements of our strategy are:

Operate as a Customer-Driven Foundry. We plan to operate as a customer-driven foundry. The increasing complexity of 40
nanometer, 28 nanometer, and more advanced technologies has impacted the entire chip industry, as ICs can now be designed with greater gate density and higher performance while incorporating the functions of an entire system. These advanced designs
have created a new proliferating market of advanced digital devices such as smart phones, which have decreased in size but greatly increased in functionality. We collaborate closely with our customers as well as partners throughout the entire supply
chain, including equipment, electronic design automation tool and intellectual property vendors to work synergistically toward each customers SoC solution. We also possess experience and know-how in system design and architecture to integrate
customer designs with advanced process technologies and intellectual property. We believe the result is a higher rate of first-pass silicon success for our SoC solutions. Our customer-driven foundry solutions begin with a common logic-based
platform, where designers can choose the process technologies and transistor options that best fit their specific application. From there, technologies such as radio frequency complementary metal-oxide-semiconductor, or RF CMOS, and embedded Flash
memories can be used to further fine-tune the process for customers individual needs. Furthermore, as intellectual property has become critical resources for SoCs, our portfolio includes basic design building blocks as well as more complex
intellectual property of optimized portability and cost, developed both internally and by third-party partners. With advanced technology, a broad intellectual property portfolio, system knowledge and advanced 300-millimeter manufacturing, we offer
comprehensive solutions that help customers deliver successful results in a timely fashion.



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Build up Customer-focused Partnership Business Model. We have focused on building
partnership relationships with our customers, and we strive to help our customers achieve their objectives through close cooperation. Unlike the traditional buy-and-sell relationship between a foundry and its customers, we believe our partnership
business model will help us understand our customers requirements and, accordingly, better accommodate our customers needs in a number of ways, such as customized processes and services that optimize the entire value chain (not just the
foundry portion) and intellectual property-related support. We believe that this business model will enable us to deliver our products to our customers at the earliest time our customers require for their design cycle, resulting in shorter
time-to-market and time-to-volume production. Furthermore, we believe we will render more cost-effective services by focusing our research and development expenditures on the specific requirements of our customers. We believe our partnership
business model will help us not only survive a market downturn, but also achieve a better competitive position.

Continue to Focus
on High Growth Applications and Customers and Actively Explore New Market Opportunities. We believe one measure of a successful foundry company is the quality of its customers. We focus our sales and marketing on customers who are
established or emerging leaders in industries with high growth potential. Our customers include industry leaders such as Broadcom, MediaTek, Realtek, Texas Instruments, Xilinx and Qualcomm. We seek to maintain and expand our relationships with these
companies. We strive to demonstrate to these customers the superiority and flexibility of our manufacturing, technology and service capabilities and to provide them with production and design assistance. We are also making efforts to further
diversify our customer portfolio in order to maintain a balanced exposure to different applications and different customers. We believe these efforts strengthen our relationships with our customers and enhance our reputation in the semiconductor
industry as a leading foundry service provider.

In addition to customer diversification, we have also been actively exploring new market
opportunities in consumer electronics such as Internet of Things.

Maintain Our Leading Position in Mass-Producible Semiconductor
Technology and Selectively Pursue Strategic Investments in New Technologies. We believe that maintaining and enhancing our leadership in mass-producible semiconductor manufacturing technology is critical to attract and retain customers. Our
reputation for technological excellence has attracted both established and emerging leaders in the semiconductor industries who work closely with us on technology development. In addition, we believe our superior processing expertise has enabled us
to provide flexible production schedules to meet our customers particular needs. We plan to continue enhancing capital expenditures in research and development and building internal research and development expertise, to focus on process
development and to establish alliances with leading and specialty semiconductor companies to accelerate access to next-generation and specialized technologies. For example, we introduced our 28-nanometer technology to customers in 2011 to
significantly increase the competitive advantages of our customers by providing better device performance in a smaller die size. In 2011, we achieved more than 10 customers and tapeouts for our 28-nanometer technology in 2011 and delivered pilot
production on this generation to our lead customer. In 2014, our 28-nanometer technology further led to over 40 tapeouts. With our continuous technology development efforts and capital investment, in 2015, revenue derived from 28-nanometer
technology had significantly increased from 2014. We believe our progress in developing more advanced process technologies has benefited our customers in the fields of computers, communications, consumer electronics and others with special
preferences in certain aspects of the products, such as the ultimate performance, density and power consumption.

Moreover, we expect to
strengthen our leading position and increase our market share by licensing our technologies to several corporate partners. For example, in 2014, we licensed to MIFS, which is expected to be a pure-play foundry company, our advanced 40 nanometer
technology under a technology transfer and license agreement. We will continue to explore licensing opportunities based on UMCs comprehensive technology offerings to further drive our revenue. In addition, we also entered into an
agreement with the Xiamen Municipal Peoples Government and Fujian Electronics & Information Group in 2014 in connection with the newly established USC located in Xiamen, Fujian Province, China, which is focusing on the manufacturing of
12-inch wafers with initial offering of 40 nanometer and 55 nanometer process technologies. We believe that such strategy enables us to take advantage of our established research and development capabilities while expanding our footprint globally in
a cost-effective manner.



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We also recognize that every company has limited resources and that the foundry industry is
ever-evolving. Accordingly, we believe we should invest in new research and development technology intelligently and in a cost-effective manner to achieve the ultimate output of the resulting technology. In doing so, we balance the rate of return of
our research and development with the importance of developing a technology at the right time to enhance our competitive edge without unduly diluting our profitability. We intend to avoid investments in technologies that do not present a commercial
potential for volume production. We believe that to develop the earliest and most advanced semiconductor technology without regard to its potential for near term volume production may prove costly to our operations and would not strengthen our
competitive position. We perceive a benefit to defer investment in the premature equipment needed to claim the earliest advanced technology and instead to purchase a more advanced and less expensive version of equipment from vendors who design such
equipment based on pre-production lessons learned from the earliest technology.

Maintain Scale and Capacity Capabilities to Meet
Customer Requirements, with a Focus on 12-inch Wafer Facilities for Future Expansion. We believe that maintaining our foundry capacity with advanced technology and facilities is critical to the maintenance of our industry leadership. Our
production capacity is currently among the largest of all semiconductor foundries in the world. We intend to increase our 12-inch wafer production capacity to meet the needs of our customers and to fully capitalize on the expected growth of our
industry. We expect our future capacity expansion plans will focus on 12-inch wafer facilities in order to maintain our technology leadership. 12-inch wafers offer manufacturing advantages over 8-inch wafers due to, among other reasons, the greater
number of chips on each wafer and the advantages only offered on newer 12-inch capable equipment. In addition, 12-inch wafer facilities present a more cost-effective solution in achieving an economic scale of production. We intend to carefully
monitor current market conditions in order to optimize the timing of our capital spending. We also plan to continue to expand our capacity and capabilities to meet customer requirements in different markets and expand our global presence by making
strategic investments in other companies. For example, in 2014, we invested in MIFS in Japan with Fujitsu Semiconductor Limited and in USC in China with the Xiamen Municipal Peoples Government and Fujian Electronics & Information Group
that will focus on manufacturing semiconductors using 12-inch wafers. These investments enable us to achieve a greater economy of scale with respect to 300mm wafer operations for advanced node process technologies. We also licensed our advanced
technologies to these invested companies in order to provide feasible technology solutions to fulfill their needs.



|B. | Business Overview
|-- | -----------------

Manufacturing Facilities

To maintain a leading position in the foundry business, we have placed great emphasis on achieving and maintaining a high standard of
manufacturing quality. As a result, we seek to design and implement manufacturing processes that produce consistent, high manufacturing yields to enable our customers to estimate, with reasonable certainty, how many wafers they need to order from
us. In addition, we continuously seek to enhance our production capacity and process technology, two important factors that characterize a foundrys manufacturing capability. Our large production capacity and advanced process technologies
enable us to provide our customers with volume production and flexible and quick-to-market manufacturing services. All of our fabs operate 24 hours per day, seven days per week. Substantially all maintenance at each of the fabs is performed
concurrently with production.

As a step in our continuing expansion of our manufacturing complex in the Tainan Science Park in southern
Taiwan, we completed the construction of our second 300mm fab in Taiwan in May 2009, and moved the equipment into this fab in July 2010.



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The following table sets forth operational data of each of our manufacturing facilities as of
December 31, 2015.



|                                  |  |                 |  |                 |  |                 |  |                 |  |                 |  |                 |  |                 |  |                 |  |                 |  |                
|--------------------------------- |  | --------------- |  | --------------- |  | --------------- |  | --------------- |  | --------------- |  | --------------- |  | --------------- |  | --------------- |  | --------------- |  | ---------------
|                                  |  | Wavetek         |  | Fab 8A          |  | Fab 8C          |  | Fab 8D          |  | Fab 8E          |  | Fab 8F          |  | Fab 8S          |  | Fab 8N          |  | Fab 12A         |  | Fab 12i        
|Commencement of volume production |  | 1989            |  | 1995            |  | 1998            |  | 2000            |  | 1998            |  | 2000            |  | 2000            |  | 2003            |  | 2002            |  | 2004           
|Estimated full capacity(1)(2)     |  | 33,000          |  | 68,000          |  | 29,000          |  | 28,500          |  | 35,000          |  | 32,500          |  | 28,000          |  | 62,550          |  | 68,602          |  | 48,107         
|                                  |  | wafersper
month |  | wafersper
month |  | wafersper
month |  | wafersper
month |  | wafersper
month |  | wafersper
month |  | wafersper
month |  | wafersper
month |  | wafersper
month |  | wafersper
month
|Wafer size                        |  | 6-inch          |  | 8-inch          |  | 8-inch          |  | 8-inch          |  | 8-inch          |  | 8-inch          |  | 8-inch          |  | 8-inch          |  | 12-inch         |  | 12-inch        
|                                  |  | (150mm)         |  | (200mm)         |  | (200mm)         |  | (200mm)         |  | (200mm)         |  | (200mm)         |  | (200mm)         |  | (200mm)         |  | (300mm)         |  | (300mm)        



|(1) | Measured in stated wafer size.
|--- | ------------------------------

|(2) | The capacity of a fab is determined based on the capacity ratings given by manufacturers of the equipment used in the fab, adjusted for, among other factors, actual output during uninterrupted trial runs, expected down
time due to set up for production runs and maintenance and expected product mix.
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

The following table sets forth the size
and primary use of our facilities and whether such facilities, including land and buildings, are owned or leased. Our land in the Hsinchu and Tainan Science Parks is leased from the R.O.C. government.



|                                                                                           |  |                     |  |                         |  |                                  |  |                                
|------------------------------------------------------------------------------------------ |  | ------------------- |  | ----------------------- |  | -------------------------------- |  | -------------------------------
|Location                                                                                   |  | Size(Land/Building) |  | Primary Use             |  | Land(Owned or Leased)            |  | Building(Owned or Leased)      
|                                                                                           |  | (in square meters)  |  |                         |  |                                  |  |                                
|Fab 8A, 3, 5 Li-Hsin 2nd Rd.,
Hsinchu Science Park, Hsinchu, Taiwan 30078, R.O.C.          |  | 43,137 / 83,699     |  | 8-inch waferproduction  |  | Leased (expires inDecember 2033) |  | Owned                          
|                                                                                           |  |                     |  |                        
|Fab 8C, 6 Li-Hsin 3rd Rd.,
Hsinchu Science Park, Hsinchu, Taiwan 30078, R.O.C.             |  | 24,572 / 71,427     |  | 8-inch waferproduction  |  | Leased (expires inDecember 2033) |  | Owned                          
|                                                                                           |  |                     |  |                        
|Fab 8D, 8 Li-Hsin 3rd Rd.,
Hsinchu Science Park, Hsinchu, Taiwan 30078, R.O.C.             |  | 9,219 / 29,181      |  | 8-inch waferproduction  |  | Leased (expires inDecember 2033) |  | Owned                          
|                                                                                           |  |                     |  |                        
|Fab 8E, 17 Li-Hsin Rd., Hsinchu Science
Park, Hsinchu, Taiwan 30078, R.O.C.                |  | 35,779 / 76,315     |  | 8-inch waferproduction  |  | Leased (expires inFebruary 2036) |  | Owned                          
|                                                                                           |  |                     |  |                        
|Fab 8F, 3 Li-Hsin 6th Rd.,
Hsinchu Science Park, Hsinchu, Taiwan 30078, R.O.C.             |  | 23,781 / 65,736     |  | 8-inch waferproduction  |  | Leased (expires inFebruary 2018) |  | Owned                          
|                                                                                           |  |                     |  |                        
|Fab 8S, 16 Creation 1st Rd.,
Hsinchu Science Park, Hsinchu, Taiwan 30077, R.O.C.           |  | 20,365 / 65,614     |  | 8-inch waferproduction  |  | Leased (expires inDecember 2023) |  | Owned                          
|                                                                                           |  |                     |  |                        
|Fab 8N, 333, Xinghua St., Suzhou Industrial
Park, Suzhou, Jiangsu Province 215025, PRC     |  | 215,621 / 100,908   |  | 8-inch waferproduction  |  | Leased (expires inDecember 2052) |  | Owned                          
|                                                                                           |  |                     |  |                        
|Fab 12A, 18, 20 Nan-Ke 2nd Rd.,
Tainan Science Park, Sinshih, Tainan, Taiwan 74147,
R.O.C. |  | 243,250 / 629,916   |  | 12-inch waferproduction |  | Leased (expires inNovember 2034) |  | Owned                          
|                                                                                           |  |                     |  |                        
|Fab 12i, 3 Pasir Ris Drive 12 Singapore
519528                                             |  | 84,836 / 144,980    |  | 12-inch waferproduction |  | Leased (expires inMarch 2031)    |  | Owned                          
|                                                                                           |  |                     |  |                        
|Fab 12X, No. 899 Wan Jia Chun Road, Xiangan District, Xiamen, PRC                         |  | 254,698 / -         |  | 12-inch waferproduction |  | Leased (expires inJanuary 2065)  |  | Owned (constructionin progress)
|                                                                                           |  |                     |  |                        
|United Tower, 3 Li-Hsin 2nd Rd.,
Hsinchu Science Park, Hsinchu, Taiwan 30078, R.O.C.       |  | 8,985 / 85,224      |  | Administrationoffice    |  | Leased (expires inDecember 2033) |  | Owned                          
|                                                                                           |  |                     |  |                        
|Neihu Rd. office, 8F, 68. Sec. 1, Neihu Rd.,
Taipei, Taiwan 11493, R.O.C.                  |  | 626 / 4,817         |  | Administrationoffice    |  | Owned                            |  | Owned                          



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|                                                                                            |  |                     |  |                                        |  |                                  |  |                            
|------------------------------------------------------------------------------------------- |  | ------------------- |  | -------------------------------------- |  | -------------------------------- |  | ---------------------------
|Location                                                                                    |  | Size(Land/Building) |  | Primary Use                            |  | Land(Owned or Leased)            |  | Building(Owned or Leased)  
|                                                                                            |  | (in square meters)  |  |                                        |  |                                  |  |                            
|Testing Building, 1, Chin-Shan, 7th St.,
Hsinchu, Taiwan 30080, R.O.C.                      |  | 10,762 / 41,318     |  | Leased to severalcompanies             |  | Owned                            |  | Owned                      
|                                                                                            |  |                     |  |                                       
|R&D Building, 18 Nan-Ke 2nd Rd.,
Tainan Science Park, Sinshih, Tainan, Taiwan 74147,
R.O.C. |  | 42,000 / 47,396     |  | Research anddevelopment                |  | Leased (expires inDecember 2023) |  | Owned                      
|                                                                                            |  |                     |  |                                       
|Nexpower, 2, Houke S. Rd., Houli District,
Taichung, Taiwan 42152, R.O.C.                   |  | 57,556 / 82,699     |  | Solar PV modulesproduction             |  | Leased (expires inDecember 2026) |  | Owned                      
|                                                                                            |  |                     |  |                                       
|Unistars, 1F, 669, Sec. 4, Zhongxing Rd.,
Zhudong Township, Hsinchu, Taiwan 31061, R.O.C.   |  | - / 1,955           |  | High-power LEDpackage and LED
lighting |  | N/A                              |  | Leased (expires inMay 2017)
|                                                                                            |  |                     |  |                                       
|Wavetek, 10, Chuangxin 1st Rd.,
Baoshan Township, Hsinchu, Taiwan 30076, R.O.C.             |  | 27,898 / 34,609     |  | 6-inch waferproduction                 |  | Leased (expires inAugust 2035)   |  | Owned                      

Process Technology

Process technology is a set of specifications and parameters that we implement for manufacturing the critical dimensions of the patterned
features of the circuitry of semiconductors. Our process technologies are currently among the most advanced in the foundry industry. These advanced technologies have enabled us to provide flexible production schedules to meet our customers
particular needs.

The continued enhancement of our process technologies has enabled us to manufacture semiconductor devices with smaller
geometries, allowing us to produce more dice on a given wafer. We pioneered the production of semiconductor products with 0.25 and 0.18 micron process technology in 1997 and 1999, respectively, and used copper interconnect metallurgic to allow
better reliability and higher conductibility than traditional aluminum interconnects. We began volume production using 0.13-micron process technology in 2002. Our extensive experience in the 0.13-micron process technology has helped smooth our
transition to 90-nanometer pilot production. Our 90-nanometer process marks further advance in our technology achievements, incorporating up to nine copper metal layers, triple gate oxide and other advanced features and using chrome-less phase-shift
masks. This technology has been in volume production since the second quarter of 2004 after passing several product certifications. In 2005, our research and development teams continued to work closely with the manufacturing staff to finalize our
90-nanometer technology portfolio. These collaborative efforts, performed in our best-in-class 300mm facilities, contributed to the improvement of high density 6T-SRAM yield to the maturity level of more than 90%. Our accomplishments led to multiple
design awards followed by first silicon success, including a PC graphic IC and the worlds first 90-nanometer Wireless Local Area Network (WLAN) RF chip featuring a unique and specially developed inductor scheme. In addition, we were able to
develop, within 6 months, several customized 90-nanometer processes tailored to our customers device specifications, and demonstrated product success by delivering record high yield for the first product lots. Our first fully-functional
65-nanometer wireless digital baseband customer IC was produced in July of 2005, after only a year since this research and development project began at this facility.

Since the third quarter of 2006, we have begun the mass production of a next-generation 65-nanometer FPGA product, which features a 65% logic
capacity increase over previous generation of FPGAs with triple gate oxide and 11 copper metal layers. Our 65/55-nanometer development team is not only independently developing our technologies in-house but is also bringing up customized process
technologies to match customer specific needs. Furthermore, our 45/40-nanometer process technologies, which are jointly developed by us and our strategic partners have been in production since the first half of 2009, significantly increasing the
competitive advantages of our customers by providing better device performance in a smaller die size. Our 28nm process technologies with Poly-SiON and High-k/metal gate are developed for low power consumption and high performance applications,
respectively. In October 2008, we were the first foundry to deliver fully functional 28nm SRAM chips, and have proven in customer silicon the High-k/metal gate solution used for this technology node. UMCs 28nm progress was also recognized by
the industry with the foundry being selected to present at the 2009 IEDM on a hybrid High-k/metal gate approach. Currently, we are already working with several customers to adopt their products on UMCs 28nm technology. In 2013, we successfully
developed and released into production 28nm Poly-SiON and High-k/metal gate technologies. Furthermore, we joined the International Business Machines Corporation, or IBM chip alliance, for the 10nm process development. With IBMs know-how and
support, we aim to continue to improve our internally developed 14nm technology, so as to offer a 14nm competitive low-power enhanced technology for mobile computing and communication products, and furthermore to develop the 10nm process
technology to meet the needs of our customers. We have also successfully developed specialty technologies, such as 55/40/28 eFlash, 55/40/28 eHV, 55nm BSI-CIS and 55nm BCD, for SoC applications.



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##### Table of Contents

The table below sets forth our actual process technology range, categorized by line widths, or
the minimum physical dimensions of the transistor gate of integrated circuits in production by each fab, in 2015, and the estimated annual full capacity of each fab, actual total annual output and capacity utilization rates in 2013, 2014 and 2015:



|                             |  |                          |  |                                       |               |  |                                                               |  |       |      |  |  |       |   |  |  |       |  
|---------------------------- |  | ------------------------ |  | ------------------------------------- | ------------- |  | ------------------------------------------------------------- |  | ----- | ---- |  |  | ----- | - |  |  | ----- | -
|                             |  |                          |  | Year Ended
December 31,
2015 Range of |               |  | Years Ended December 31,                                      | 
|                             |  | Years of                 |  | Process                               |               |  | 2013                                                          |  |       | 2014 |  |  | 2015  |  
|                             |  | Commencementof Operation |  | Technologies(in microns)              |               |  | (in thousands of 8-inch waferequivalents, except percentages) | 
|Fab                          |  |                          |  |                                       |               |  |                                                               |  |       |      |  |  |       |   |  |  |       |  
|Wavetek                      |  | 1989                     |  |                                       | 0.5           |  |                                                               |  | 252   |      |  |  | 252   |   |  |  | 237   |  
|Fab 8A                       |  | 1995                     |  |                                       | 0.5 to 0.25   |  |                                                               |  | 813   |      |  |  | 813   |   |  |  | 813   |  
|Fab 8C                       |  | 1998                     |  |                                       | 0.35 to 0.11  |  |                                                               |  | 347   |      |  |  | 347   |   |  |  | 347   |  
|Fab 8D                       |  | 2000                     |  |                                       | 0.13 to 0.09  |  |                                                               |  | 382   |      |  |  | 358   |   |  |  | 341   |  
|Fab 8E                       |  | 1998                     |  |                                       | 0.5 to 0.18   |  |                                                               |  | 418   |      |  |  | 418   |   |  |  | 418   |  
|Fab 8F                       |  | 2000                     |  |                                       | 0.18 to 0.11  |  |                                                               |  | 388   |      |  |  | 388   |   |  |  | 388   |  
|Fab 8S                       |  | 2000                     |  |                                       | 0.18 to 0.11  |  |                                                               |  | 335   |      |  |  | 335   |   |  |  | 335   |  
|Fab 8N(1)                    |  | 2003                     |  |                                       | 0.5 to 0.13   |  |                                                               |  | 469   |      |  |  | 547   |   |  |  | 667   |  
|Fab 12A                      |  | 2002                     |  |                                       | 0.13 to 0.028 |  |                                                               |  | 1,465 |      |  |  | 1,576 |   |  |  | 1,784 |  
|Fab 12i                      |  | 2004                     |  |                                       | 0.13 to 0.040 |  |                                                               |  | 1,238 |      |  |  | 1,289 |   |  |  | 1,287 |  
|Total estimated capacity     |  |                         |  |                                       |              |  |                                                               |  | 6,107 |      |  |  | 6,323 |   |  |  | 6,617 |  
|Total output (actual)        |  |                         |  |                                       |              |  |                                                               |  | 5,026 |      |  |  | 5,629 |   |  |  | 5,940 |  
|Average capacity utilization |  |                         |  |                                       |              |  |                                                               |  | 82.3  | %    |  |  | 89.0  | % |  |  | 89.8  | %



|(1) | In 2013, we obtained controlling interests in Best Elite, which owns 100% interests in Fab 8N.
|--- | ----------------------------------------------------------------------------------------------

The table below sets forth a breakdown of number and percentage of wafer output by process technologies in 2013, 2014 and 2015.



|                        |  |                                                                |       |  |      |  |       |      |  |  |       |  |  |  |       |  |  |  |       |  |  |  |       | 
|----------------------- |  | -------------------------------------------------------------- | ----- |  | ---- |  | ----- | ---- |  |  | ----- |  |  |  | ----- |  |  |  | ----- |  |  |  | ----- | 
|                        |  | Years Ended December 31,                                       |      
|                        |  | 2013                                                           |       |  | 2014 |  |       | 2015 | 
|                        |  | (in thousands of 8-inch wafer equivalents, except percentages) |      
|Technology              |  |                                                                |       |  |      |  | %     |      |  |  |       |  |  |  | %     |  |  |  |       |  |  |  | %     | 
|28 nanometers and under |  |                                                                | 10    |  |      |  | 0.2   |      |  |  | 76    |  |  |  | 1.5   |  |  |  | 269   |  |  |  | 4.5   | 
|40 nanometers           |  |                                                                | 622   |  |      |  | 12.4  |      |  |  | 766   |  |  |  | 13.6  |  |  |  | 968   |  |  |  | 16.3  | 
|65 nanometers           |  |                                                                | 1,140 |  |      |  | 22.7  |      |  |  | 1,138 |  |  |  | 20.2  |  |  |  | 1,037 |  |  |  | 17.5  | 
|90 nanometers           |  |                                                                | 235   |  |      |  | 4.7   |      |  |  | 306   |  |  |  | 5.4   |  |  |  | 245   |  |  |  | 4.1   | 
|0.11/0.13 micron        |  |                                                                | 828   |  |      |  | 16.5  |      |  |  | 875   |  |  |  | 15.6  |  |  |  | 909   |  |  |  | 15.3  | 
|0.15/0.18 micron        |  |                                                                | 796   |  |      |  | 15.8  |      |  |  | 904   |  |  |  | 16.0  |  |  |  | 888   |  |  |  | 14.9  | 
|0.25/0.35 micron        |  |                                                                | 1,033 |  |      |  | 20.5  |      |  |  | 1,174 |  |  |  | 20.8  |  |  |  | 1,252 |  |  |  | 21.1  | 
|0.50 micron or higher   |  |                                                                | 362   |  |      |  | 7.2   |      |  |  | 390   |  |  |  | 6.9   |  |  |  | 372   |  |  |  | 6.3   | 
|                        |  |                                                                |       |  |      |  |       |      |  |  |       |  |  |  |       |  |  |  |       |  |  |  |       | 
|Total                   |  |                                                                | 5,026 |  |      |  | 100.0 |      |  |  | 5,629 |  |  |  | 100.0 |  |  |  | 5,940 |  |  |  | 100.0 | 
|                        |  |                                                                |       |  |      |  |       |      |  |  |       |  |  |  |       |  |  |  |       |  |  |  |       | 

Capacity and Utilization

The fabs in Taiwan that we own directly are named Wavetek, Fab 8A, Fab 8C, Fab 8D, Fab 8E, Fab 8F and Fab 8S, all of which are located in the
Hsinchu Science Park in Taiwan, and Fab 12A, which is located in the Tainan Science Park in Taiwan. The fab in Singapore is named Fab 12i and the fab in China is named Fab 8N.



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Our average capacity utilization rate was 82.3% in 2013, 89.0% in 2014 and 89.8% in 2015,
respectively.

Equipment

Considering
the performance and productivity of our manufacturing capability highly relies on the quality of our capital equipment, we generally purchase equipment that not only meet the demand of our existing process technology, but also have the capability to
be upgraded to match our future needs. The principal equipment we use to manufacture semiconductor devices are scanners/steppers, cleaners and track equipment, inspection equipment, etchers, furnaces, wet stations, strippers, implanters, sputters,
CVD equipment, probers, testers and so on. We own all of the production equipment except for a few demonstration tools.

Our policy is to
purchase high-quality equipment that demonstrates stable performance from vendors with dominant market share to ensure our continued competitiveness in the semiconductor field.

Some of the equipment is available from a limited number of qualified vendors and/or is manufactured in relatively limited quantities, and
some equipment has only recently been developed. We believe that our relationships with equipment suppliers are strong enough that we can leverage our position as a major purchaser to purchase equipment on competitive terms, including shorter lead
time, compared with the terms received by several other foundries.

Although we face the challenge of procuring the right equipment in
sufficient quantity necessary for ramp-up or expansion of our fabrication facilities under constraint of short lead times, we have not in the past experienced any material problems in procuring the latest generation equipment on a timely basis even
in periods of unpredictably high market demand. We manage the risks in the procurement process through timely internal communications among different divisions, efficient market information collection, early reservation of appropriate delivery slots
and constant communications with our suppliers as well as by utilizing our good relationships with the vendors.

Raw Materials

Our manufacturing processes use many raw materials, primarily silicon wafers, chemicals, gases and various types of precious sputtering
targets. These raw materials are generally available from several suppliers. Our policy with respect to raw material purchases, similar to that for equipment purchases, is to select only a small number of qualified vendors who have demonstrated
quality and reliability on delivery time of the raw materials. We may have any long-term supply contracts with our vendors if necessary.

Our general inventory policy is to maintain sufficient stock of each principal raw material for production and rolling forecasts of near-term
requirements received from customers. In addition, we have agreements with several key material suppliers under which they hold similar levels of inventory in their warehouses for our use. However, we are not under any obligation to purchase raw
material inventory that is held by our vendors for our benefit until we actually order it. We typically work with our vendors to plan our raw material requirements on a monthly basis, with indicative pricing generally set on a quarterly basis. The
actual purchase price is generally determined based on the prevailing market conditions. In the past, prices of our principal raw materials have not been volatile to a significant degree. Although we have not experienced any shortage of raw
materials that had a material effect on our operations, and supplies of raw materials we use currently are adequate, shortages could occur in various critical materials due to interruption of supply or an increase in industry demand.

The most important raw material used in our production processes is silicon wafer, which is the basic raw material from which integrated
circuits are made. The principal makers for our wafers are Shin-Etsu, Siltronic AG, SunEdison Corporation, Sumco Group and GlobalWafers. We have in the past obtained and believe that we will continue to be able to obtain a sufficient supply of
silicon wafers. We believe that we have close working relationships with our wafer suppliers. Based on such long-term relationships, we believe that these major suppliers will use their best efforts to accommodate our demand.



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We use a large amount of water in our manufacturing process. We obtain water supplies from
government-owned entities and recycle approximately 85% of the water that we use during the manufacturing process. We also use substantial amounts of dual loop electricity supplied by Taiwan Power Company in the manufacturing process. We maintain
back-up generators that are capable of providing adequate amounts of electricity to maintain the required air pressure in our clean rooms in case of power interruptions. We believe our back-up devices are reasonably adequate in preventing business
interruptions caused by power outages and emergency situations.

Quality Management

We believe that our advanced process technologies and reputation for high quality and reliable services and products have been important
factors in attracting and retaining leading international and domestic semiconductor companies as customers.

We structure our quality
management system in accordance with the latest international quality standards and our customers strict quality and reliability requirements. Our quality management system incorporates comprehensive quality control programs into the entire
business flow of foundry operation including, among others, new process development management, production release control, incoming raw material inspection, statistical process control and methodology development, process change management,
technical documentation control, product final inspection, metrology tool calibration and measurement system analysis, quality audit program, nonconformity management, customer complaint disposition, eight-discipline problem solving and customer
satisfaction monitoring.

We set a high quality goal to ensure consistent high yielding and reliable product performance. Our quality
program is continually enhanced through top-down annual Business Policy Management and bottom-up Total Quality Management activities. In addition, our efforts to observe best practices among fabs in the foundry industry have also contributed to the
improvement of our overall quality management system.

Many of our customers perform physical production site qualification process in the
early development phase and routine quality conformance audits in the volume production phase. These audits include both quality system review and physical fabrication area inspection for verification of conformity with the international quality
standard and customers quality requirement. Our quality management system and quality control programs have been qualified and routinely audited by numerous customers who are recognized as world-class semiconductor companies with best-in-class
quality standards.

Our Quality Assurance Division and Reliability Technology and Assurance Division collaborate to provide quality and
reliability performance to customers. With our wafer processing quality and reliability conformance monitor program, we monitor the product quality and reliability at various stages of the entire manufacturing process before shipment to customers.

All our fabs are certified in compliance with ISO/TS 16949 and QC080000 IECQ HSPM standards. ISO/TS 16949 sets the criteria for
developing a fundamental quality management system emphasizing on customer satisfaction in quality management, continual improvement, defect prevention and variation and waste reduction. QC080000 IECQ HSPM sets the criteria for developing a process
management system for hazardous substances and focuses on developing environmentally friendly manufacturing processes. We are committed to continuously improve our quality management system and to deliver high quality product to our customers.

Services and Products

We primarily
engage in wafer fabrication for foundry customers. To optimize fabrication services for our customers, we work closely with them as they finalize circuit design and contract for the preparation of masks to be used in the manufacturing process. We
also offer our customers turnkey services by providing subcontracted assembly and test services. We believe that this ability to deliver a variety of foundry services in addition to wafer fabrication enables us to accommodate the needs of a full
array of integrated device manufacturers, system companies and fabless design customers with different in-house capabilities.



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Wafer manufacturing requires many distinct and intricate steps. Each step in the manufacturing
process must be completed with precision in order for finished semiconductor devices to work as intended. The processes require taking raw wafers and turning them into finished semiconductor devices generally through five steps: circuit design, mask
tooling, wafer fabrication, assembly and test. The services we offer to our customers in each of these five steps are described below.

Circuit Design. At this initial design stage, our engineers generally work with our customers to ensure that their designs can
be successfully and cost-effectively manufactured in our facilities. We have assisted an increasing number of our customers in the design process by providing them with access to our partners electronic design analysis tools, intellectual
property and design services as well as by providing them with custom embedded memory macro-cells. In our Silicon Shuttle program, we offer customers and intellectual property providers early access to actual silicon samples with their desired
intellectual property and content in order to enable early and rapid use of our advanced technologies. The Silicon Shuttle program is a multi-chip test wafer program that allows silicon verification of intellectual property and design elements. In
the Silicon Shuttle program, several different vendors can test their intellectual property using a single mask set, greatly reducing the cost of silicon verification for us and the participating vendors. The high cost of masks for advanced
processes makes this program attractive to intellectual property vendors. ARM Limited, Faraday Technology Corp., MIPS Technologies International, and Synopsys Inc. have utilized our Silicon Shuttle program. In our alliances with them, we coordinate
with leading suppliers of intellectual property, design and ASIC services to ensure their offerings are available to our customers in an integrated, easy to use manner which matches customers need to our technologies. With a view to lowering
customer design barriers, we expanded our design support functions from conventional design support to adding intellectual property development to complement third-party intellectual properties and to provide customers with the widest range of
silicon-verified choices. Our offerings range from design libraries to basic analog mixed-mode intellectual properties which, together, have helped shorten our customers design cycle time.

Mask Tooling. Our engineers generally assist our customers to design and/or obtain masks that are optimized for our advanced
process technologies and equipment. Actual mask production is usually provided by independent third parties specializing in mask tooling.

Wafer Fabrication. As described above, our manufacturing service provides all aspects of the wafer fabrication process by
utilizing a full range of advanced process technologies. During the wafer fabrication process, we perform procedures in which a photosensitive material is deposited on the wafer and exposed to light through the mask to form transistors and other
circuit elements comprising of a semiconductor. The unwanted material is then etched away, leaving only the desired circuit pattern on the wafer. As part of our wafer fabrication services, we also offer wafer probing services, which test, or probe,
individual die on the processed wafers and identify dice that fail to meet required standards. We prefer to conduct wafer probing internally to obtain speedier and more accurate data on manufacturing yield rates.

Assembly and Testing. We offer our customers turnkey services by providing the option to purchase finished semiconductor
products that have been assembled and tested. We outsource assembly and test services to leading assembly and test service providers, including Siliconware Precision Industries Co., Ltd., or Siliconware, and Advanced Semiconductor Engineering Inc.
in Taiwan. After final testing, the semiconductors are shipped to our customers designated locations.

In addition to our foundry
business, we also engage in the research, development and manufacture of products in the solar energy and LED industries.



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Customers and Markets

Our primary customers, in terms of our sales revenues, include premier integrated device manufacturers, such as Texas Instruments, Intel Mobile
and STMicroelectronics, and leading fabless design companies, such as Xilinx, Broadcom, MediaTek, Realtek, Qualcomm and Novatek. Although we are not dependent on any single customer, a significant portion of our net operating revenues has been
generated from sales to a few customers. Our top ten customers accounted for approximately 57.3% of our net operating revenues in 2015. Set forth below is a geographic breakdown of our operating revenues in 2013, 2014 and 2015 by the location of our
customers.



|                            |  |                          |       |  |      |  |       |      |  |  |       | 
|--------------------------- |  | ------------------------ | ----- |  | ---- |  | ----- | ---- |  |  | ----- | 
|                            |  | Years Ended December 31, |      
|Region                      |  | 2013                     |       |  | 2014 |  |       | 2015 | 
|                            |  | %                        |       |  | %    |  |       | %    | 
|Taiwan                      |  |                          | 32.9  |  |      |  | 34.2  |      |  |  | 31.8  | 
|Singapore                   |  |                          | 23.8  |  |      |  | 12.5  |      |  |  | 12.6  | 
|China (including Hong Kong) |  |                          | 9.5   |  |      |  | 10.7  |      |  |  | 8.1   | 
|Japan                       |  |                          | 3.7   |  |      |  | 5.4   |      |  |  | 7.0   | 
|USA                         |  |                          | 12.4  |  |      |  | 8.9   |      |  |  | 8.8   | 
|Europe                      |  |                          | 9.8   |  |      |  | 19.6  |      |  |  | 23.4  | 
|Others                      |  |                          | 7.9   |  |      |  | 8.7   |      |  |  | 8.3   | 
|                            |  |                          |       |  |      |  |       |      |  |  |       | 
|Total                       |  |                          | 100.0 |  |      |  | 100.0 |      |  |  | 100.0 | 
|                            |  |                          |       |  |      |  |       |      |  |  |       | 

We believe our success in attracting these end customers is a direct result of our commitment to high quality
service and our intense focus on customer needs and performance. As an independent semiconductor foundry, most of our operating revenue is generated by our sales of wafers. For 2015, gross wafer sales represented 95.9% of our net operating revenue.
The following table presented the percentages of our gross wafer sales by types of customers for the years ended December 31, 2013, 2014 and 2015.



|                                |  |                          |       |  |      |  |       |      |  |  |       | 
|------------------------------- |  | ------------------------ | ----- |  | ---- |  | ----- | ---- |  |  | ----- | 
|                                |  | Years Ended December 31, |      
|Customer Type                   |  | 2013                     |       |  | 2014 |  |       | 2015 | 
|                                |  | %                        |       |  | %    |  |       | %    | 
|Fabless design companies        |  |                          | 88.6  |  |      |  | 90.8  |      |  |  | 87.8  | 
|Integrated device manufacturers |  |                          | 11.4  |  |      |  | 9.2   |      |  |  | 12.2  | 
|                                |  |                          |       |  |      |  |       |      |  |  |       | 
|Total                           |  |                          | 100.0 |  |      |  | 100.0 |      |  |  | 100.0 | 
|                                |  |                          |       |  |      |  |       |      |  |  |       | 

We focus on providing a high level of customer service in order to attract customers and maintain their
ongoing loyalty. Our culture emphasizes responsiveness to customer needs with a focus on flexibility, speed and accuracy throughout our manufacturing and delivery processes. Our customer-oriented approach is especially evident in two types of
services: customer design development services and manufacturing services. For example, in 2013, we expand our regional business by opening our UMC Korea office, in order to provide local support to our customers in Korea, and shorten time-to-market
for our Korea-based customers designing and manufacturing on UMC process technologies. We believe that our large production capacity and advanced process technology enable us to provide better customer service than many other foundries through
shorter turn-around time, greater manufacturing flexibility and higher manufacturing yields.

We work closely with our customers
throughout the design development and prototyping processes. Our design support team closely interacts with customers and intellectual property vendors to facilitate the design process and to identify their specific requirements for intellectual
property offerings. We are responsive to our customers requirements in terms of overall turn-around time and production time-to-market by, for example, helping our customers streamline their intellectual property offering processes and
delivering prototypes in a timely and easy-to-use fashion. We also maintain flexibility and efficiency in our technical capability and respond quickly to our customers design changes.

For intellectual property offerings, we work with several leading intellectual property vendors from digital, memory and analog fields in the
semiconductor industry, such as Faraday Technology Corp., Synopsys Inc., ARM Limited, Sidense Corp., Kilopass Technology, eMemory Technology Inc., True Circuits, Inc., Silicon Storage Technology, Inc., eSilicon Corp., Krivi Semiconductor Private
Limited, Cadence Design System, Inc., Cypress Semiconductor Corporation, Moortec Semiconductor Limited and Dolphin Integration SA, to deliver quality intellectual property blocks that have been silicon validated using our advanced processes. Our
alliances with major electronic design automation vendors, such as Cadence, Mentor and Synopsys Inc., provide our customers with digital/analog reference design procedures and easy-to-use design solutions. By continuously enhancing our intellectual
property offerings, reference design procedures and design services through collaboration with major vendors, we aim to provide complete, accurate and user-friendly design solutions to our customers.



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As a design moves into manufacturing production, we continue to provide ongoing customer support
through all phases of the manufacturing process. The local account manager works with our customer service representative to ensure the quality of our services, drawing upon our marketing and customer engineering support teams as required.

We offer an online service, MyUMC, which gives our customers easy access to our foundry services by providing a total online
supply chain solution. MyUMC offers 24-hour access to detailed account information such as manufacturing, engineering and design support documents through each customers own customized start page. The features that are available to customers
through MyUMC include (i) viewing the status of orders from the start of production to the final shipping stages; (ii) designing layouts to shorten customers tape out time; (iii) collecting customer engineering requests; (iv) gathering and
downloading documents for design purposes; and (v) and accessing online in real-time the same manufacturing data used by our fab engineers. In addition, we have a system-to-system connecting services to provide direct data exchange between our
system and our customers systems. These services, which include our UMC Design View Room Cloud Service, facilitate our design collaborations with our customers to help reduce the cost of chip designs and reduce the time to market.
In order to continue to improve our information security management, our Information Technology Division received the certification of ISO/IEC 27001:2005 in March 2008 and renewed ISO/IEC 27001:2013 certification in February 2015.

We price our products on a per die or per wafer basis, taking into account the complexity of the technology, the prevailing market conditions,
the order size, the cycle time, the strength and history of our relationship with the customer and our capacity utilization. Our main sales office is located in Taiwan, which is in charge of our sales activities in Asia. United Microelectronics
(Europe) BV, our wholly-owned subsidiary based in Amsterdam, assists our sales to customers in Europe. Our sales in North America are made through UMC Group (USA), our subsidiary located in Sunnyvale, California. We also have sales offices in China,
Japan and Korea to support our customers in those regions.

We typically designate a portion of our wafer manufacturing capacity to some
of our customers primarily under two types of agreements: reciprocal commitment agreements and deposit agreements. Under a reciprocal commitment agreement, the customer agrees to pay for, and we agree to supply, a specified capacity at a specified
time in the future. Under a deposit agreement, the customer makes in advance a cash deposit for an option on a specified capacity at our fabs for a stated period of time. Option deposits are credited to wafer purchase prices as shipments are made.
If this customer does not use the specified capacity, it will forfeit the deposit but, in certain circumstances and with our permission, the customer may arrange for a substitute customer to utilize such capacity. In some cases, we also make
available capacity to customers under other types of agreements, such as capacity commitment arrangements with technology partners.

We
advertise in trade journals, organize technology seminars, hold a variety of regional and international sales conferences and attend a number of industry trade fairs to promote our products and services. We also publish a corporate newsletter for
our customers.

Competition

The
worldwide semiconductor foundry industry is highly competitive, particularly during periods of overcapacity and inventory correction. We compete internationally and domestically with dedicated foundry service providers as well as with integrated
device manufacturers and final product manufacturers which have in-house manufacturing capacity or foundry operations. Some of our competitors have substantially greater production, financial, research and development and marketing resources than we
have. As a result, these companies may be able to compete more aggressively over a longer period of time than we can. In addition, several new dedicated foundries have commenced operations and compete directly with us. Any significant increase in
competition may erode our profit margins and weaken our earnings.

We believe that our primary competitors in the foundry services market
are Taiwan Semiconductor Manufacturing Company Limited, Semiconductor Manufacturing International (Shanghai) Corporation and Globalfoundries Inc., as well as the foundry operation services of some integrated device manufacturers such as IBM,
Samsung, Intel and Toshiba. Other competitors such as DongbuAnam Semiconductor, Grace Semiconductor Manufacturing Corp., X-FAB Semiconductors Foundries AG and Silterra Malaysia Sdn. Bhd. have initiated efforts to develop substantial new foundry
capacity, although much of such capacity involves less cost-effective production than the 12-inch fabs for which we possess technical know-how. New entrants in the foundry business are likely to initiate a trend of competitive pricing and create
potential overcapacity in legacy technology. The principal elements of competition in the semiconductor foundry industry include technical competence, production speed and cycle time, time-to-market, research and development quality, available
capacity, manufacturing yields, customer service and price. We believe that we compete favorably with the new competitors on each of these elements, particularly our technical competence and research and development capabilities.



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Intellectual Property

Our success depends in part on our ability to obtain patents, licenses and other intellectual property rights covering our production processes
and activities. To that end, we have acquired certain patents and patent licenses and intend to continue to seek patents on our production processes. As of December 31, 2015, we held 4,673 U.S. patents and 6,601 patents issued outside of the United
States.

Our ability to compete also depends on our ability to operate without infringing on the proprietary rights of others. The
semiconductor industry is generally characterized by frequent claims and litigation regarding patent and other intellectual property rights. As is the case with many companies in the semiconductor industry, we have from time to time received
communications from third parties asserting patents that allegedly cover certain of our technologies and alleging infringement of certain intellectual property rights of others. We expect that we will receive similar communications in the future.
Irrespective of the validity or the successful assertion of such claims, we could incur significant costs and devote significant management resources to the defense of these claims, which could seriously harm our company. See Item 3. Key
InformationD. Risk FactorsOur inability to obtain, preserve and defend intellectual property rights could harm our competitive position.

In order to minimize our risks from claims based on our manufacture of semiconductor devices or end-use products whose designs infringe on
others intellectual property rights, we in general accept orders only from companies that we believe enjoy satisfactory reputation and for products that are not identified as risky for potential infringement claims. Furthermore, we obtain
indemnification rights from customers. We also generally obtain indemnification rights from equipment vendors to hold us harmless from any losses resulting from any suit or proceedings brought against our company involving allegation of infringement
of intellectual property rights on account of our use of the equipment supplied by them.

We have entered into various patent
cross-licenses with major technology companies, including a number of leading international semiconductor companies, such as IBM and LSI. Our cross licenses may have different terms and expiry dates. Depending upon our competitive position and
strategy, we may or may not renew our cross licenses and further, we may enter into different and/or additional technology and/or intellectual property licenses in the future.

Research and Development

In 2013, 2014
and 2015, we spent NT$12,493 million, NT$13,664 million and NT$12,175 million (US$371 million), respectively, on research and development, which represented 10.1%, 9.8% and 8.4%, respectively, of our net operating revenues of such years. Our
research and development efforts mainly focus on delivering SoC foundry solutions that consist of the worlds leading process technologies, customer support services and manufacturing techniques. These resources provide our foundry customers
with improved opportunities to develop SoC products that supply the global market. Our commitment to research and development can be illustrated by our 2015 research and development expenditures, which reached approximately 8.4% of net operating
revenues. In June 2007, we completed the construction of a research and development center for nanometer technologies in the Tainan Science Park. The research and development center allows for seamless application of advanced process technology in
the research and development phase to the manufacturing phase.

As of March 31, 2016, we employed 1,597 professionals in our research and
development activities. In addition, other management and operational personnel are also involved in research and development activities but are not separately identified as research and development professionals.



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Our Investments

Depending on the market conditions, we intend to gradually reduce our investments through exchangeable bond offerings and other measures
available to our company.

In December 2009, we issued two tranches of zero coupon exchangeable bonds due 2014. The two exchangeable bond
offerings consist of US$127.2 million bonds exchangeable into common shares of Unimicron Technology Corporation, or Unimicron, and US$80 million bonds exchangeable into common shares of Novatek Microelectronics Corp., Ltd., or Novatek. As of
December 31, 2013, certain bondholders have exercised their rights to exchange their bonds with the total principal amount of US$77 million into common shares of Novatek. On July 22, 2013, we called back all the outstanding amount of the US$3
million bonds exchangeable into common shares of Novatek. We recognized a gain of NT$45 million from the redemption and classified the gain as other gains and losses. Gains arising from the exercise of exchange rights during the year ended December
31, 2013, amounted to NT$1,137 million and was recognized as gain on disposal of investment. We redeemed all of the outstanding bonds of the US$127.2 million zero coupon bonds exchangeable into common shares of Unimicron that we originally issued in
December 2009, at their 97.53% of principal amount of each bond on December 2, 2014, which was the final maturity date.

The following table sets forth
the sales of our investments in 2013:



|                                                                     |  |                                    |     |  |                        |  |     |                                         |  |  |     | 
|-------------------------------------------------------------------- |  | ---------------------------------- | --- |  | ---------------------- |  | --- | --------------------------------------- |  |  | --- | 
|Investees                                                            |  | Number of shares sold(in millions) |     |  |                        |  |     | Proceeds from disposal(in NT$ millions) | 
|Industrial Bank of Taiwan Corp.                                      |  |                                    | 118 |  |                        |  |     |                                         |  |  | 772 | 
|Parade Technologies, Ltd.                                            |  |                                    | 3   |  |                        |  |     |                                         |  |  | 632 | 
|Pixart Imaging Inc.                                                  |  |                                    | 6   |  |                        |  |     |                                         |  |  | 373 | 
|                                                                     | 
|The following table sets forth the sales of our investments in 2014: |  |                                    |     |  |                       
|                                                                     |  |                                    |    
|Investees                                                            |  | Number of shares sold(in millions) |     |  |                        |  |     | Proceeds from disposal(in NT$ millions) | 
|Montage Technology Group Ltd.                                        |  |                                    | 1   |  |                        |  |     |                                         |  |  | 915 | 
|Epistar Corp.                                                        |  |                                    | 11  |  |                        |  |     |                                         |  |  | 726 | 
|Parade Technologies, Ltd.                                            |  |                                    | 1   |  |                        |  |     |                                         |  |  | 460 | 
|Dexon Dynamic Investment Fund VIII                                   |  |                                    | 0   |  |                        |  |     |                                         |  |  | 359 | 
|                                                                     | 
|The following table sets forth the sales of our investments in 2015: |  |                                    |     |  |                       
|                                                                     |  |                                   
|                                                                     |  | Number of shares sold              |     |  | Proceeds from disposal | 
|Investees                                                            |  | (in millions)                      |     |  | (in NT$ millions)      |  |     | (in US$ millions)                       | 
|Superalloy Industrial Co., Ltd.                                      |  |                                    | 5   |  |                        |  | 614 |                                         |  |  | 19  | 
|Translink Capital Partners III, L.P.                                 |  |                                    |    |  |                        |  | 307 |                                         |  |  | 9   | 
|Taiwan High Speed Rail Corp.                                         |  |                                    | 30  |  |                        |  | 300 |                                         |  |  | 9   | 
|Mercuries Life Insurance Co., Ltd.                                   |  |                                    | 15  |  |                        |  | 274 |                                         |  |  | 8   | 



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Environmental, Safety and Health Matters

UMC implemented extensive ESH management systems since 1996. These systems enable our operations to identify applicable ESH regulations, assist
in evaluating compliance status and timely establish loss preventive and control measures. The systems we implemented in all our fabs have been certified as meeting the ISO 14001 and OHSAS 18001 standards. ISO 14001 consists of a set of standards
that provide guidance to the management of organizations to achieve an effective environmental management system. Procedures are established at manufacturing locations to ensure that all accidental spills and discharges are properly addressed. OHSAS
18001 is a recognizable occupational health and safety management system standard, which may be applied to assess and certify our management systems. Our goal in implementing ISO 14001 and OHSAS 18001 systems is to continually improve our ESH
management, comply with ESH regulations and to be a sustainable green foundry. UMCs major ESH policies include:

Environmental
Protection Aspects:



| |  |  | To be an environmentally friendly enterprise characterized by continual improvement with a goal of pollution-free production;
| | - |  | -----------------------------------------------------------------------------------------------------------------------------



| |  |  | To incorporate our environmental management system into the general organizational management system;
| | - |  | -----------------------------------------------------------------------------------------------------



| |  |  | To take initiatives to reduce waste production and prevent pollution by introducing and developing environmentally friendly technology for design, production and operation;
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | To conserve energy and recycle resources in order to be a model of environmental protection for the international community;
| | - |  | ----------------------------------------------------------------------------------------------------------------------------



| |  |  | To fulfill corporate social responsibilities by playing an active role in public and community affairs to improve and protect the environment; and
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | To educate employees about environmentally sound ethics and practices.
| | - |  | ----------------------------------------------------------------------

Safety and Health
Aspects:



| |  |  | To achieve a goal of zero accidents and comply with all applicable safety and regulatory requirements to ensure safety is the top priority for UMCs sustainable development;
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | To reinforce best safety and health management practice to reach international ESH and risk management standards;
| | - |  | -----------------------------------------------------------------------------------------------------------------



| |  |  | To adopt risk control advanced ESH management and rescue technologies to enhance companys standards;
| | - |  | -----------------------------------------------------------------------------------------------------



| |  |  | To provide safe work environment and operation through preventive management and audit;
| | - |  | ---------------------------------------------------------------------------------------



| |  |  | To eliminate hazard factors and prevent incidents through each and every ownership of responsibilities in safety and health; and
| | - |  | --------------------------------------------------------------------------------------------------------------------------------



| |  |  | To encourage all employees to actively participate in safety and health training and promotional activities.
| | - |  | ------------------------------------------------------------------------------------------------------------

As a member of the global community and a semiconductor industry leader, we have implemented measures to deal with environmental problems and
mitigate climate change. We have introduced green concepts in our operations, including green commitment, management, procurement, production, products, recycling, office, education and marketing.

In order to conquer the green barrier formed by the RoHS (the Restriction of the Use of Certain Hazardous Substances in Electrical and
Electronic Equipment) Directive, we established a cross-division HSPM (Hazardous Substances Process Management) committee to manage all development and implementation of related work. We completed the final system audit for QC 080000 ICEQ HSPM
qualification, a certification for having a hazardous substance process management system that meets the RoHS Directive, on June 9, 2006 and became the first semiconductor manufacturer worldwide to achieve HSPM certification for all fabs. In 2009,
we completed the report on the carbon footprint verification for integrated circuit wafers produced at our facilities, the first such report in the foundry industry. In 2010, we completed water footprint verification for our 200 mm and 300 mm
wafers. These verifications provide scientific and reliable statistics on the carbon and water information of products manufactured in our fabs as well as self-reviews of environmental impact.



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With respect to safety and health management, we realized that lowering the risks in equipment
and processes can reduce accidents, but cannot guarantee the safety of all employees. In order to achieve the goal of zero-accident, we intend to promote the concept of safety is my responsibility. We have educated the
employees with the concepts of be aware of your own safety well as the safety of others and safety is everyones responsibility, and my personal accountability.

Furthermore, we have implemented the FMEA method to foster employees capabilities in risk analysis. Therefore, we established a channel
for communication to encourage and ensure the employees to fully express their opinions for professional response and assistance. By doing so, we hope to establish a working attitude of Safety and health first to further improve the
quality of our working environment, and eventually to become a good example of global safety and health management.

The following list
sets forth some of the important awards that we received in environmental protection, safety and health:



| |  |  | Selected as a member of Dow Jones Sustainability Indexes for eight years since 2008;
| | - |  | ------------------------------------------------------------------------------------



| |  |  | Awarded second place in the Channel NewsAsia Sustainability Ranking (2015);
| | - |  | ---------------------------------------------------------------------------



| |  |  | Listed on the international Climate Disclosure Leadership Index (CDLI), for three consecutive years;
| | - |  | ------------------------------------------------------------------------------------------------------



| |  |  | Awarded Taiwan Corporate Sustainability Award by Taiwan Institute for Sustainable Energy (2008-2015);
| | - |  | -------------------------------------------------------------------------------------------------------



| |  |  | Awarded The Channel NewsAsia Sustainability Ranking: Top 4 by Channel NewsAsia (2014-2015);
| | - |  | ---------------------------------------------------------------------------------------------



| |  |  | Awarded Enterprises Environmental Award of the Republic of China by the Environmental Protection Administration of Executive Yuan, R.O.C. (2003-2015);
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Awarded The Best Participation of Green Procurement for Enterprises by the Environmental Protection Administration of Executive Yuan, R.O.C. (2011-2015); and
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Awarded Excellent Occupational Safety and Health Executive Organization of Hsinchu Science Park by the Science Park Administration (1998-2015).
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------

Climate Change

Our climate change
policies announced on April 22, 2010 include: (i) achieving carbon neutral status via carbon management, (ii) becoming a comprehensive low-carbon emissions solution provider, and (iii) leveraging corporate resources to cultivate a low-carbon
emissions economy. In order to implement these policies, we set greenhouse gas reduction goals as to various phases. By 2015, we completed resource and energy productivity improvement plan named 369+-project which consisted of reducing
the usage of electricity by 3%, the usage of pipe water by 6% and the waste generation by 9% compared with the base year 2012. Currently, we announced our latest Green 2020 goals to demonstrate our long-term commitment to sustainable
environment. We will be more proactive with self-motivated action and more stringent standards. The goal is to further reduce water, energy and waste by 10% over current levels by 2020. Meanwhile, we also endeavor to reduce carbon emissions through
the following two measures: (1) we continue to implement a greenhouse gas emission reduction plan to assist customers in establishing a low-carbon emissions supply chain, and (2) we continue to enhance our research and development in advanced
processes to provide low-power products and reduce carbon emissions at the consumer level.



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Since 1999, we have been a pioneer in the foundry industry to implement measures to reduce
per-fluorinated compounds, and we completed the replacement of C3F8 with C4F8 in 2011. We have made a significant achievement by reducing normalized per-fluorinated compounds by approximately 67%, which is one of the major greenhouse gas reduction objectives of the World
Semiconductor Council, during 2000 to 2013. In 2013, we received 2,873,000 tons of carbon emissions credits from the Environmental Protection Administration, or EPA. In 2014, we and Dragon Steel Corporation executed a contract to trade 2,000,000
tons of carbon emission credits. It was the first trade of carbon emissions credits that was reviewed and recorded by EPA, indicating a significant milestone in Taiwans carbon emissions credits trading market. We plan to use all of the gains
from our carbon emissions credit sales, if any, to enforce environmental protection and promote the sustainable development of the environment.

We also support timely disclosure of carbon information and ensuring data quality. Since 2006, we have participated in the Carbon Disclosure
Project formed by global institutional investors and disclosed our annual greenhouse gas emission volume, reduction goals and results. In 2015, we were selected as the CDPs CDLI for three years. We recorded the highest foundrys score
among all participating Taiwanese semiconductor companies. Moreover, we engage third-party verifiers to ensure the quality of the data. We completed verification on greenhouse gas emission and reduction records during 2000 to 2010 for all of our
fabs in Taiwan and during 2011 to 2014 for all of our fabs in both Taiwan and Singapore. We expect to complete the 2015 greenhouse gas emissions data verification by the end of 2016.

Risk Management

Risk and safety matters
are administered by our Risk Management and Environmental Safety Health Division, or the GRM & ESH, established in 1998. We are pursuing the goal of a highly protected risk status in the semiconductor industry through the implementation of
strict engineering safety procedures, regular enforcement of safety codes and standards, and compliance of detailed industry safety guidelines.

We have adopted the Triple Star Ranking System of AIG Insurance, a global leader in risk management and insurance, since 1999. All fabs have
been ranked as top-class following AIGs risk evaluation and risk improvement recommendations. The ranking system focuses on 20 items, including ten Physical Protection Elements and ten Human Elements. Our latest 12-inch lines, Fab 12A P1/2,
12A P3/4 and 12i, obtained triple-stars in all 20 elements in the very first Triple Star Audit. Furthermore, we were awarded the Outstanding Performance Award in Risk Management by AIG Insurance again in 2013. For our new expansion
12-inch line, Fab12A P5/6, is built with international loss control standards, and had received the top-class ranking by AIG within six months after tool move-in in November 2015.

We have also implemented proactive efforts in earthquake risk prevention. We believe our efforts contributed to our quick and exemplary
recovery from two major earthquakes in Taiwan on September 21, 1999 and March 4, 2010, respectively. Our Hsinchu fabs and Fab 12A in Tainan sustained only minor impact to their operations from the earthquake without interruption to the power system
or water service. Normal operations resumed shortly after the incidents. In addition, an earthquake took place on February 6, 2016 in southern Taiwan but did not have any material impact on our operations.

Nowadays, extreme weather has become a risk to various business operations. In order to understand the potential impact to us, a flood risk
simulation project has been implemented in 2014. Since Hsinchu Science-Based Industrial Park is located in higher terrain, we believe there is no potential flood risk. However, for Fab12A in Tainan, we had conducted a physical improvement plan by
installing floodgates in specific entrances to upgrade the protection level to a 500-year flood.

In addition, we are fully aware of the
impact presented by business interruption. We are also devoted in the pursuit of corporate resilience and continuity by committing non-interrupted services to satisfy our valued customers and important stakeholders. In 2013, we were the first
foundry in the world to receive ISO 22301 certification for its business continuity management system from the Societe Generale de Surveillance, which demonstrates our commitment to developing our disaster response abilities and our mechanisms for
quick recovery. We will keep improving this system and extend the scope to our suppliers.



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In addition, our environmental efforts include the establishment of our New Business Development
Center, which helps promote a low carbon economy by investing across the entire supply chain of the green technology industry, including the solar energy, and LED industries. Our New Business Development Center currently focuses its primary
investments in the solar energy and LED industries.

Insurance

We maintain industrial all risk insurance for our buildings, facilities, equipment and inventories as well as third-party properties. The
insurance for fabs and their equipment covers losses from physical damage and business interruption up to their respective policy limits except for policy exclusions. We purchase directors and officers liability insurance for our board directors and
executive officers, covering the liabilities incurred in relation to his/her/its operation of business and legally responsible for. We also maintain public liability insurance for losses to third parties arising from our business operations. We
believe that our insurance arrangement is adequate to cover all major types of losses relevant to the semiconductor industry practice. However, significant damage to any of our production facilities, whether as a result of fire or other causes,
could seriously harm our business.



|C. | Organizational Structure
|-- | ------------------------

The following list shows our corporate structure as of
December 31, 2015:



|                                                    |  |                              |  |                                               |        |  
|--------------------------------------------------- |  | ---------------------------- |  | --------------------------------------------- | ------ | -
|Company                                             |  | Jurisdiction ofIncorporation |  | Percentage ofOwnership as ofDecember 31, 2015 |       
|UMC Group (USA)                                     |  | U.S.A.                       |  |                                               | 100.00 | %
|United Microelectronics (Europe) B.V.               |  | The Netherlands              |  |                                               | 100.00 | %
|UMC Capital Corp.                                   |  | Cayman Islands               |  |                                               | 100.00 | %
|TLC Capital Co., Ltd.                               |  | Taiwan, R.O.C.               |  |                                               | 100.00 | %
|UMC New Business Investment Corp.                   |  | Taiwan, R.O.C.               |  |                                               | 100.00 | %
|Green Earth Limited                                 |  | Samoa                        |  |                                               | 100.00 | %
|Fortune Venture Capital Corp.                       |  | Taiwan, R.O.C.               |  |                                               | 100.00 | %
|UMC Investment (Samoa) Limited                      |  | Samoa                        |  |                                               | 100.00 | %
|Unitruth Investment Corp.                           |  | Taiwan, R.O.C.               |  |                                               | 100.00 | %
|UMC Capital (USA)                                   |  | U.S.A.                       |  |                                               | 100.00 | %
|ECP VITA PTE. LTD.                                  |  | Singapore                    |  |                                               | 100.00 | %
|Soaring Capital Corp.                               |  | Samoa                        |  |                                               | 100.00 | %
|Unitruth Advisor (Shanghai) Co., Ltd.               |  | China                        |  |                                               | 100.00 | %
|Tera Energy Development Co., Ltd.                   |  | Taiwan, R.O.C.               |  |                                               | 100.00 | %
|United Microchip Corporation                        |  | Cayman Islands               |  |                                               | 100.00 | %
|Nexpower Technology Corp.                           |  | Taiwan, R.O.C.               |  |                                               | 67.54  | %
|Wavetek Microelectronics Corporation                |  | Taiwan, R.O.C.               |  |                                               | 78.47  | %
|Everrich Energy Investment (HK) Limited             |  | China                        |  |                                               | 100.00 | %
|Everrich (Shandong) Energy Co., Ltd.                |  | China                        |  |                                               | 100.00 | %
|Unistars Corp.                                      |  | Taiwan, R.O.C.               |  |                                               | 82.76  | %
|NPT Holding Limited                                 |  | Samoa                        |  |                                               | 67.54  | %
|NLL Holding Limited                                 |  | Samoa                        |  |                                               | 67.54  | %
|SocialNex Italia 1 S.R.L.                           |  | Italy                        |  |                                               | 67.54  | %
|UMC (Beijing) Limited                               |  | China                        |  |                                               | 100.00 | %
|Wavetek Microelectronics Investment (Samoa) Limited |  | Samoa                        |  |                                               | 78.47  | %
|Wavetek Microelectronics Corporation (USA)          |  | U.S.A.                       |  |                                               | 78.47  | %
|Best Elite International Limited                    |  | British Virgin Islands       |  |                                               | 91.06  | %
|Infoshine Technology Limited                        |  | British Virgin Islands       |  |                                               | 91.06  | %
|Oakwood Associates Limited                          |  | British Virgin Islands       |  |                                               | 91.06  | %
|Hejian Technology (Suzhou) Co., Ltd.                |  | China                        |  |                                               | 91.06  | %
|UnitedDS Semiconductor (Shandong) Co., Ltd.         |  | China                        |  |                                               | 91.06  | %
|United Semiconductor (Xiamen) Co., Ltd.             |  | China                        |  |                                               | 30.35  | %
|UMC Group JAPAN                                     |  | Japan                        |  |                                               | 100.00 | %
|UMC Korea Co., Ltd.                                 |  | Korea                        |  |                                               | 100.00 | %
|Omni Global Limited                                 |  | Samoa                        |  |                                               | 100.00 | %
|United Microtechnology Corporation (California)     |  | U.S.A.                       |  |                                               | 100.00 | %
|United Microtechnology Corporation (New York)       |  | U.S.A.                       |  |                                               | 100.00 | %



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##### Table of Contents

|D. | Property, Plants and Equipment
|-- | ------------------------------

Please refer to B. Business
OverviewManufacturing Facilities for a discussion of our property, plants and equipment.



|ITEM 4A. | UNRESOLVED STAFF COMMENTS
|-------- | -------------------------

Not applicable.



|ITEM 5. | OPERATING AND FINANCIAL REVIEW AND PROSPECTS
|------- | --------------------------------------------

Unless stated otherwise, the discussion
and analysis of our financial condition and results of operations in this section apply to our financial information as prepared in accordance with IFRSs. You should read the following discussion of our financial condition and results of operations
together with the consolidated financial statements and the notes to such statements included in this annual report. This discussion may contain forward-looking statements based upon current expectations that involve risks and uncertainties. Our
actual results may differ materially from those anticipated in these forward-looking statements as a result of various factors, including those set forth under Item 3. Key Information-D. Risk Factors or in other parts of this annual
report on Form 20-F.

For the convenience of readers, NT dollar amounts used in this section for, and as of, the year ended
December 31, 2015 have been translated into U.S. dollar amounts using US$1.00 = NT$32.79, the noon buying rate as certified for customs purposes by the Federal Reserve Bank of New York on December 31, 2015. The U.S. dollar translation appears in
parentheses next to the relevant NT dollar amount.

Overview

We are one of the worlds leading independent semiconductor foundries, providing comprehensive wafer fabrication services and technologies
to our customers based on their designs.

Cyclicality of the Semiconductor Industry

As the semiconductor industry is highly cyclical, revenues varied significantly over this period. It can take several years to plan and
construct a fab and bring it to operations. Therefore, during periods of favorable market conditions, semiconductor manufacturers often begin building new fabs or acquiring existing fabs in response to anticipated demand growth for semiconductors.
In addition, after commencement of commercial operations, fabs can increase production volumes rapidly. As a result, large amounts of semiconductor manufacturing capacity typically become available during the same time period. Absent a proportional
growth in demand, this increase in supply often results in semiconductor manufacturing overcapacity, which has led to a sharp decline in semiconductor prices and significant capacity under-utilization. Our average capacity utilization rate was
82.3%, 89.0% and 89.8% for the years ended December 31, 2013, 2014 and 2015, respectively. We believe that our operating results in 2013, 2014 and 2015 continue to reflect the ongoing uncertainty in the global economy, conservative corporate
information technology spending and low visibility with respect to end market demand.

Pricing

We price our products on either a per die or a per wafer basis, taking into account the complexity of the technology, the prevailing market
conditions, the order size, the cycle time, the strength and history of our relationship with the customer and our capacity utilization. Because semiconductor wafer prices tend to fluctuate frequently, we in general review our pricing on a quarterly
basis. As a majority of our costs and expenses are fixed or semi-fixed, fluctuations in our products average selling price historically have had a substantial impact on our margins. Our average selling price decreased by approximately 3.7% in
2014 compared to 2013, primarily due to nominal price erosion, and increased by approximately 1.1% in 2015 compared to 2014, primarily due to increased advanced node contribution.



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We believe that our current level of pricing is comparable to that of other leading foundries in
each respective geometry. We believe that our ability to provide a wide range of advanced foundry services and process technologies as well as large manufacturing capacity will enable us to compete effectively with other leading foundries at a
comparable price level.

Capacity Utilization Rates

Our operating results are characterized by relatively high fixed costs. In 2013, 2014 and 2015, approximately 66.8%, 67.1% and 67.1%,
respectively, of our manufacturing costs consisted of depreciation, a portion of indirect material costs, amortization of license fees and indirect labor costs.

If our utilization rates increase, our costs would be allocated over a larger number of units, which generally leads to lower unit costs. As a
result, our capacity utilization rates can significantly affect our margins. Our utilization rates have varied from period to period to reflect our production capacity and market demand. Our average capacity utilization rate was 82.3%, 89.0% and
89.8% for the years ended December 31, 2013, 2014 and 2015, respectively. Utilization rates were primarily affected by global macroeconomic factors. Other factors affecting utilization rates are efficiency in production facilities, product flow
management, the complexity and mix of the wafers produced, overall industry conditions, the level of customer orders, mechanical failure, disruption of operations due to expansion of operations, relocation of equipment or disruption of power supply
and fire or natural disaster.

Our production capacity is determined based on the capacity ratings of the equipment in the fab, provided
by the engineers, adjusted for, among other factors, actual output during uninterrupted trial runs, expected down time due to set up for production runs and maintenance, expected product mix and research and development. Because these factors
include subjective elements, our measurement of capacity utilization rates may not be comparable to those of our competitors.

Change in Product Mix
and Technology Migration

Because the price of wafers processed with different technologies varies significantly, the mix of wafers
that we produce is among the primary factors that affect our revenues and profitability. The value of a wafer is determined principally by the complexity and performance of the processing technology used to produce the wafer, as well as by the yield
and defect density. Production of devices with higher levels of functionality and performance, with better yields and lower defect density as well as with greater system-level integration requires better manufacturing expertise and generally
commands higher wafer prices. The increase in price generally has more than offset associated increases in production cost once an appropriate economy of scale is reached.

Prices for wafers of a given level of technology generally decline over the processing technology life cycle. As a result, we have
continuously been migrating to increasingly sophisticated technologies to maintain the same level of profitability. We began our volume production with 65-nanometer and 40-nanometer technologies in 2006 and 2009, respectively. We introduced our
28-nanometer technology to customers in 2011 and started large-scale commercial production in 2014. Our 28nm technology contributed approximately 10% of our foundry revenue in 2015. These types of technology migration require continuous capital and
research and development investment. Because developing and acquiring advanced technologies involve substantial capital investment, we expect to continue to spend a substantial amount of capital on upgrading our technologies and capabilities.

Manufacturing Yields

Manufacturing yield
per wafer is measured by the number of functional dice on that wafer over the maximum number of dice that can be produced on that wafer. A small portion of our products is priced on a per die basis, and our high manufacturing yields have assisted us
in achieving higher margins. In addition, with respect to products that are priced on a per wafer basis, we believe that our ability to deliver high manufacturing yields generally has allowed us to either charge higher prices per wafer or attract
higher order volumes, resulting in higher margins.



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We continually upgrade our process technologies. At the beginning of each technological upgrade,
the manufacturing yield utilizing the new technology is generally lower, sometimes substantially lower, than the yield under the current technology. The yield is generally improved through the expertise and cooperation of our research and
development personnel and process engineers, as well as equipment and at times raw material suppliers. Our policy is to offer customers new process technologies as soon as the new technologies have passed our internal reliability tests.

Investments

Most of our investments were
made to improve our market position and for strategy considerations, a significant portion of which are in foundry-related companies including fabless design customers, raw material suppliers and intellectual property vendors. In addition, we also
invest in non-foundry-related businesses, such as Cathay Financial Holding Co., Ltd. composed of insurance, securities, banking and other diversified financial institutions. We have established our NBI to identify and make strategic investments in
developing industries such as solar energy and LED.

In recent years, many countries have listed energy saving and carbon reduction as
primary administrative policies to tackle the challenge of potential energy shortages in future. Technologies for solar energy and energy saving are expected to become a focus in future technology development. On August 24, 2009, our board of
directors approved the establishment of NBI to focus on investments in the solar energy and LED industries.

In the solar manufacturing
industry, our investments consist of companies engaged in the manufacturing of crystalline PV cells and thin-film PV modules, providing engineering procurement and construction (EPC) services, and financings. Majority of our investments in the
LED industry focus on epi wafer manufacturing, as well as developing advanced wafer technology - chip scale packaging.

Other than our
investments through our NBI, we have, from time to time, disposed of investments for financial, strategic or other purposes in recent years. See Item 4. Information on the CompanyB. Business OverviewOur Investments for a
description of our investments.

Treasury Share Programs

We have from time to time announced plans, none of which were binding on us, to buy back up to a fixed amount of our common shares on the
Taiwan Stock Exchange at the price range set forth in the plans. On March 13, 2013, our board of directors resolved to purchase up to 200 million common shares on the Taiwan Stock Exchange at a price between NT$7.80 and NT$16.90 per share during the
period from March 14, 2013 to May 13, 2013 to transfer to our employees as employee compensation. On July 29, 2015, our board of directors resolved to purchase up to 200 million common shares on the Taiwan Stock Exchange at a price between NT$7.55
and NT$18.80 per share during the period from July 30, 2015 to September 29, 2015 to transfer to our employees as employee compensation.

During 2013, 2014 and 2015, we purchased an aggregate of 200 million, nil and 200 million common shares, respectively, and transferred nil,
5.49 million and 60.7 million of such common shares that we repurchased under these plans to our employees as employee compensation in 2013, 2014 and 2015, respectively.

Critical Accounting Policies

The
preparation of our consolidated financial statements requires management to make judgments, estimates and assumptions that affect the reported amounts of revenues, expenses, assets, liabilities, the accompanying disclosures and the disclosure of
contingent liabilities. However, uncertainty about these assumptions and estimates could result in outcomes that require a material adjustment to the carrying amount of assets or liabilities affected in future periods.



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The key assumptions concerning the future and other key sources of estimation for uncertainty at
the reporting date that would have a significant risk for a material adjustment to the carrying amounts of assets or liabilities within the next fiscal year are discussed below. We based our assumptions and estimates on information available when
the consolidated financial statements were prepared. Existing circumstances and assumptions about future developments, however, may change due to market changes or circumstances arising beyond our control. Such changes are reflected in the
assumptions when they occur.

Classification and Measurement of Financial Instruments

Financial assets and financial liabilities are recognized when we become a party to the contractual provisions of the instrument. We determine
the classification of our financial assets at initial recognition. In accordance with IAS 39 - Financial Instruments: Recognition and Measurement (IAS 39), our financial assets are classified as financial assets at fair value through
profit or loss, available-for-sale financial assets, held-to-maturity financial assets and notes, accounts and other receivables. Our financial liabilities are classified as financial liabilities at fair value through profit or loss and financial
liabilities carried at amortized cost. Purchase or sale of financial assets and liabilities are recognized using trade date accounting. All financial instruments are recognized initially at fair value plus, in the case of investments not at fair
value through profit or loss, directly attributable costs, and are subsequently measured at fair value or amortized cost using the effective interest method, less impairment, based on the classification. We assess whether objective evidence of
impairment exists for a financial asset or a group of financial assets at each reporting date.

Where the fair values of financial assets
and financial liabilities recorded in the balance sheet cannot be derived from active markets, they are determined using valuation techniques including income approach (for example, the discounted cash flows model) or the market approach. Changes in
assumptions about these factors could affect the reported fair value of the financial instruments. Please refer to Note 11 to our audited consolidated financial statements included elsewhere in this annual report for more details.

Inventories

Inventories are accounted
for on a perpetual basis. Raw materials are stated at actual purchase costs, while the work in process and finished goods are stated at standard costs and subsequently adjusted to weighted-average costs at the end of each month. The cost of work in
progress and finished goods comprises raw materials, direct labor, other direct costs and related production overheads. Allocation of fixed production overheads to the costs of conversion is based on the normal capacity of the production facilities.
Cost associated with underutilized capacity is expensed as incurred.

Inventories are valued at the lower of cost and net realizable value
item by item. Net realizable value is the estimated selling price in the ordinary course of business less the estimated costs of completion and the estimated costs necessary to make the sale. Please refer to Note 6(4) to our audited consolidated
financial statements included elsewhere in this annual report. Costs of completion include direct labor and overhead, including depreciation and maintenance of production equipment, indirect labor costs, indirect material costs, supplies, utilities
and royalties that is expected to be incurred at normal production level. We estimate normal production level taking into account loss of capacity resulting from planned maintenance, based on historical experience and current production capacity.

Bonds

Convertible bonds

We evaluate the terms of the convertible bonds issued to determine whether it contains both a liability and an equity
component. Furthermore, we assess if the economic characteristics and risks of the put and call options embedded in the convertible bonds are closely related to the economic characteristics and risk of the host contract before separating the
equity element.

For the liability component excluding the derivatives, its fair value is determined based on the effective interest rate
applied at that time by the market to instruments of comparable credit status. The liability component is classified as a financial liability measured at amortized cost using the effective interest rate method before the instrument is converted
or settled. For the embedded derivative that is not closely related to the host contract, it is classified as a liability component and subsequently measured at fair value through profit or loss unless it qualifies as an equity
component. The equity component is recognized initially at the difference between the fair value of the compound financial instrument as a whole and the fair value of the liability component. Its carrying amount is not remeasured in the
subsequent accounting periods. If the convertible bond issued does not have an equity component, it is accounted for as a hybrid instrument in accordance with the requirements under IAS 39.



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If the convertible bondholders exercise their conversion right before maturity, we shall adjust
the carrying amount of the liability component. The adjusted carrying amount of the liability component at conversion and the carrying amount of equity component are credited to common stock and additional paid-in capital - premiums. No
gain or loss is recognized upon bond conversion.

In addition, the liability component of convertible bonds is classified as a current
liability if within 12 months the bondholders may exercise the put right. After the put right expires, the liability component of the convertible bonds should be reclassified as a non-current liability if it meets the definition of a non-current
liability in all other respects.

Post-Employment Benefits

All regular employees are entitled to a defined benefit pension plan that is managed by an independently administered pension fund committee.
Fund assets are deposited under the committees name with the Bank of Taiwan and hence, not associated with us. Therefore, fund assets are not to be included in our consolidated financial statements. Pension benefits for employees of the
overseas branch and subsidiaries are provided in accordance with the local regulations.

Post-employment benefit plan that is classified
as a defined benefit plan is accounted for under the Projected Unit Credit Method to measure its obligations and costs based on actuarial assumptions. We recognize all actuarial gains and losses in the periods which they occur in other comprehensive
income, which then are immediately recognized in retained earnings.

Cost of post-employment benefit pension plan and the present value of
the pension obligation are determined using actuarial valuations. An actuarial valuation involves making various assumptions which may differ from actual developments in the future. These include the determination of the discount rate, future salary
increases and mortality rates. Due to the complexity of the valuation, the underlying assumptions and its long-term nature, a defined benefit obligation is highly sensitive to changes in these assumptions. All assumptions are reviewed at each
reporting date. The assumptions used for measuring pension cost and the present value of the pension obligation are disclosed in Note 6(14) to our audited consolidated financial statements included elsewhere in this annual report.

In determining the appropriate discount rate, management considers the interest rates of the government bonds extrapolated from maturity
corresponding to the expected duration of the defined benefit obligation. As for the rate of future salary increase, management takes account of past experiences, comparisons within the industry and the geographical region, inflation and the
discount rate.

Revenue Recognition

Revenue is recognized to the extent that it is probable that the economic benefits will flow to us and the revenue can be reliably measured.
Revenue is measured at the fair value of the consideration received or receivable. The specific criteria described below must also be met before revenue is recognized.



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Sales revenue

We manufacture semiconductors for creditworthy customers based on their design specifications, pursuant to manufacturing agreements and/or
purchase orders at contractual prices. We ship wafers mainly under the trade term, Free Carrier (FCA), through which the title and risk of loss for the wafers are transferred to the customers upon delivery to carriers approved by the
customers. Sales revenue is recognized at this point, having also fulfilled all of the following criteria pursuant to IAS 18, paragraph 14:



| | a. | the significant risks and rewards of ownership of the goods have been transferred to the customer;
| | -- | --------------------------------------------------------------------------------------------------



| | b. | neither continuing managerial involvement to the degree usually associated with ownership nor effective control over the goods sold have been retained;
| | -- | -------------------------------------------------------------------------------------------------------------------------------------------------------



| | c. | the amount of revenue can be measured reliably;
| | -- | -----------------------------------------------



| | d. | it is probable that the economic benefits associated with the transaction will flow to the entity; and
| | -- | ------------------------------------------------------------------------------------------------------



| | e. | the costs incurred or to be incurred in respect of the transaction can be measured reliably.
| | -- | --------------------------------------------------------------------------------------------

Sales revenue is measured at the fair value of the consideration received or receivable, net of sales returns and discounts, which are
estimated based on customer complaints, historical experience and other known factors. Sales returns and discounts are recorded in the same period in which sales are made.

Impairment of Property, Plant and Equipment

At each reporting date or whenever events indicate that the assets value has declined or significant changes in the market with an
adverse effect have taken place, we assess whether there is an indication that an asset in the scope of IAS 36 - Impairment of Assets may be impaired. If any indication exists, we complete impairment testing for the cash-generating unit
(CGU) to which the individual assets belong. Where the carrying amount of an asset or CGU exceeds its recoverable amount, the asset is considered impaired and is written down to its recoverable amount. The recoverable amount of an
individual asset or CGU is the higher of fair value less costs of disposal and its value in use. The fair value less costs of disposal is based on best information available to reflect the amount that an entity could obtain from the disposal of the
asset in an orderly transaction between market participants after deducting the costs of disposal. The value in use is measured at the net present value of the future cash flows the entity expects to derive from the asset or CGU. Cash flow
projection involves subjective judgments and estimates which include the estimated useful lives of property, plant and equipment, capacity that generates future cash flows, capacity of physical output, potential fluctuations of economic cycle in the
industry and our operating situation.

Income Tax

Income tax expense (benefit) is the aggregate amount of current income tax and deferred income tax included in the determination of profit or
loss for the period. Current income tax assets and liabilities for the current period and prior periods are measured using the tax rates and tax laws that have been enacted or substantively enacted by the end of the reporting period. Current income
tax relating to items recognized directly in other comprehensive income or equity is recognized in other comprehensive income or equity rather than profit or loss.

Deferred income tax is determined using the liability method on temporary differences between the tax bases of assets and liabilities and
their carrying amounts in financial statements at the reporting date. Deferred tax assets and liabilities are measured at the tax rates that are expected to apply in the year when the asset is realized or the liability is settled, based on tax rates
and tax laws that have been enacted or substantively enacted at the reporting date. The measurement of deferred tax assets and liabilities reflects the tax consequences that would follow the manner in which we expect, at the end of the reporting
period, to recover or settle the carrying amount of its assets and liabilities. Deferred tax relating to items recognized outside profit or loss is not recognized in profit or loss but rather in other comprehensive income or directly in equity.
Deferred tax assets are reassessed and recognized at each reporting date. Unrecognized deferred tax assets are reassessed at each reporting date and are recognized to the extent that it has become probable that future taxable profits will allow the
deferred tax assets to be recovered. Deferred tax assets and liabilities offset each other, if a legally enforceable right exists to set off current income tax assets against current income tax liabilities, and the deferred taxes relate to the same
taxable entity and the same taxation authority.



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Uncertainties exist with respect to the interpretation of complex tax regulations, changes in tax
laws, and the amount and timing of future taxable income. We establish provisions, based on reasonable estimates, for possible consequences of audits by the tax authorities of the respective countries in which it operates. The amount of such
provisions is based on various factors, such as experience of previous tax audits and different interpretations of tax regulations made by the taxable entity and the responsible tax authority. Such differences of interpretation may arise on a wide
variety of issues depending on the conditions prevailing in our respective domicile.

Deferred tax assets are recognized for all
carryforward of unused tax losses tax credits and deductible temporary differences to the extent that it is probable that future taxable profit will be available or there are sufficient taxable temporary differences against which the unused tax
losses, unused tax credits or deductible temporary differences can be utilized. The amount of deferred tax assets determined to be recognized is based upon the likely timing and the level of future taxable profits and taxable temporary differences.
Please refer to Note 6(22) to our audited consolidated financial statements included elsewhere in this annual report for more details on unrecognized deferred tax assets.



|A. | Operating Results
|-- | -----------------

Effect of Adopting IFRSs in 2013

We started to prepare our annual consolidated financial statements in accordance with IFRSs as of and for the year ended December 31, 2013 and
thereafter. Prior to December 31, 2012, we prepared our annual consolidated financial statements in accordance with R.O.C. GAAP. Effective January 1, 2013, companies listed on the Taiwan Stock Exchange, including us, must report their financial
statements under TIFRSs pursuant to the requirements of the Framework for Adoption of International Financial Reporting Standards by Companies in the R.O.C. promulgated by the FSC on May 14, 2009. Accordingly, we have adopted TIFRSs for reporting in
the R.O.C. our annual consolidated financial statements starting from the year ended December 31, 2013. We also prepare our interim unaudited quarterly financial statements beginning in the first quarter of 2013 under TIFRSs, which are furnished to
the SEC on Form 6-K. At the same time, we have adopted IFRSs as issued by the IASB for our annual reports on Form 20-F with the U.S. SEC starting from the year ended December 31, 2013.

In accordance with rule amendments adopted by the U.S. SEC for foreign private issuers reporting under IFRSs, we are not required to provide
reconciliations to U.S. GAAP in this annual report following our adoption of IFRSs.

Net Operating Revenues

We generate our net operating revenues primarily from the manufacture and sales of wafer fabricating semiconductor devices, solar energy and
new generation LED. We also derive a small portion of our net operating revenues from wafer probe services that we perform internally as well as mask tooling services and assembly and test services that we subcontract to other companies.

Operating Costs

Our operating
costs consist principally of:



| |  |  | overhead, including depreciation and maintenance of production equipment, indirect labor costs, indirect material costs, supplies, utilities and royalties;
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | wafer costs;
| | - |  | ------------



| |  |  | direct labor costs; and
| | - |  | -----------------------



| |  |  | service charges paid to subcontractors for mask tooling, assembly and test services.
| | - |  | ------------------------------------------------------------------------------------



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Our total depreciation expenses were NT$37,242 million, NT$38,786 million and NT$43,473 million
(US$1,326 million) in 2013, 2014 and 2015, respectively.

Operating Expenses

Our operating expenses consist of the following:



| |  |  | Sales and marketing expenses. Sales and marketing expenses consist primarily of intellectual property development expenses, salaries and related personnel expenses, wafer sample expenses and related marketing expenses.
Wafer samples are actual silicon samples of our customers early design ideas made with our most advanced processes and provided to those customers;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | General and administrative expenses. General and administrative expenses consist primarily of salaries for our administrative, finance and human resource personnel, fees for professional services, and cost of computer
and communication systems to support our operations; and
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Research and development expenses. Research and development expenses consist primarily of research testing related expenses, salaries and related personnel expenses and depreciation on the equipment used for our
research and development.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Net Other Operating Income and Expenses

Net other operating income and expenses consist primarily of:



| |  |  | gains or losses arising from disposal of property, plant and equipment;
| | - |  | -----------------------------------------------------------------------



| |  |  | the recognition or reversal of impairment losses of property, plant and equipment and intangible assets; and
| | - |  | ------------------------------------------------------------------------------------------------------------



| |  |  | net rental income or loss from property.
| | - |  | ----------------------------------------

Non-operating Income and Expenses

Our non-operating income and expenses primarily consist of the following:



| | 1. | Other income, which consists of:
| | -- | --------------------------------



| |  |  | interest income, which is primarily derived from time deposits; and
| | - |  | -------------------------------------------------------------------



| |  |  | dividend income, which is primarily derived from financial assets at fair value through profit or loss, available-for-sale financial assets and financial assets measured at cost.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 2. | Other gains and losses, which principally consist of:
| | -- | -----------------------------------------------------



| |  |  | gains or losses on valuation of financial assets and liabilities, which are primarily derived from disposal of and changes in the values of financial assets and liabilities classified as fair value through profit or
loss, according to IAS 39;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | impairment loss, which is primarily derived from the loss recognized in available-for-sale financial assets and financial assets measured at cost, noncurrent;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | gains or losses on disposal of investments, which are primarily derived from our disposal of available-for-sale financial assets, financial assets measured at cost and investments accounted for under the equity method;
and
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | other gains and losses, which are primarily derived from compensation on malfunctioned machines and our branchs grant income received from the government in Singapore.
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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| | 3. | Finance costs, which principally consist of:
| | -- | --------------------------------------------



| |  |  | interest expenses, which are primarily derived from bonds payable and bank loans; and
| | - |  | -------------------------------------------------------------------------------------



| |  |  | financial expenses, which are primarily derived from stockholder services proxy fee.
| | - |  | ------------------------------------------------------------------------------------



| | 4. | Share of profit or loss of associates and joint ventures, which is primarily derived from the recognition of investee companies net profit based on the ownership percentage we hold.
| | -- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 5. | Bargain purchase gain, which is mainly derived from the acquisition of Best Elite. The purchase consideration was less than the fair value of Best Elites net assets due to our unique position to better utilize the
assets, such as improving utilization, and the lack of liquidity of Best Elites ordinary and preferred shares.
| | -- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Taxation

Based on our status as a company engaged in the semiconductor business in Taiwan, we have been granted exemptions from income
taxes in Taiwan with respect to income attributable to capital increases for the purpose of purchasing equipment related to the semiconductor business for a period of five years following each such capital increase. In addition, our branch in
Singapore enjoys tax exemption for income derived from tax-exempted activities under Singapores Income Tax Act and Economic Expansion Incentive (Relief from Income Tax) Act. These tax exemptions resulted in tax savings of approximately nil,
NT$182 million and NT$1,642 million (US$50 million) in 2013, 2014 and 2015, respectively. Our tax rate was 17% in 2015, the same rate applicable to companies outside the Hsinchu Science Park. We also benefit from other tax incentives generally
available to technology companies in Taiwan, such as tax credits applicable against corporate income tax that range from 5% to 20% of the amount of investment in certain qualified equipment and 15% of qualified research and development expenditures.
These tax incentives resulted in tax savings of approximately NT$38 million, NT$549 million and NT$589 million (US$18 million) in 2013, 2014 and 2015, respectively.

In 1997, the R.O.C. Income Tax Law was amended to integrate corporate income tax and stockholder dividend tax to eliminate the double taxation
effect for resident stockholders of Taiwan companies. Under the amendment, all retained earnings generated from January 1, 1998 and not distributed to stockholders as dividends in the following year will be assessed a 10% retained earnings tax.

As a result, if we do not distribute all of our annual retained earnings generated beginning January 1, 1998 as cash and/or stock dividends in
the following year, these earnings will be subject to the 10% retained earnings tax.

In addition, the R.O.C. government enacted the
R.O.C. Income Basic Tax Act, also known as the Alternative Minimum Tax Act, or the AMT Act, which became effective on January 1, 2006 to impose an alternative minimum tax. AMT is a supplemental tax which is payable if the income tax
payable pursuant to the R.O.C. Income Tax Act is below the minimum amount prescribed under the AMT Act. Prior to 2013, a company is subject to a 10% AMT if its annual taxable income under the AMT Act exceeds NT$2 million. Effective on January 1,
2013, after the amendment on August 8, 2012, the statutory tax rate was increased from 10% to 12%, if its annual taxable income under the AMT Act exceeds NT$0.5 million.

After taking into account the tax exemptions and tax incentives discussed above, we recorded NT$2,257 million, NT$3,125 million and NT$1,028
million (US$31 million) of income tax expenses in 2013, 2014 and 2015, respectively. Our effective income tax rate in 2015 was 7.52%.



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Comparisons of Results of Operations

The following table sets forth some of our results of operations data as a percentage of our net operating revenues for the periods indicated.



|                                                    |  |                          |       |   |      |  |       |      |  |  |       |  
|--------------------------------------------------- |  | ------------------------ | ----- | - | ---- |  | ----- | ---- |  |  | ----- | -
|                                                    |  | Years Ended December 31, |      
|                                                    |  | 2013                     |       |   | 2014 |  |       | 2015 | 
|                                                    |  | %                        |       |   | %    |  |       | %    | 
|Net operating revenues                              |  |                          | 100.0 |   |      |  | 100.0 |      |  |  | 100.0 |  
|Operating costs                                     |  |                          | (81.0 | ) |      |  | (77.2 | )    |  |  | (78.1 | )
|                                                    |  |                          |       |   |      |  |       |      |  |  |       |  
|Gross profit                                        |  |                          | 19.0  |   |      |  | 22.8  |      |  |  | 21.9  |  
|Operating expenses                                  |  |                          |       |   |      |  |       |      |  |  |       |  
|Sales and marketing                                 |  |                          | (2.6  | ) |      |  | (2.9  | )    |  |  | (2.8  | )
|General and administrative                          |  |                          | (2.9  | ) |      |  | (2.5  | )    |  |  | (2.6  | )
|Research and development                            |  |                          | (10.1 | ) |      |  | (9.8  | )    |  |  | (8.4  | )
|                                                    |  |                          |       |   |      |  |       |      |  |  |       |  
|Subtotal                                            |  |                          | (15.6 | ) |      |  | (15.2 | )    |  |  | (13.8 | )
|                                                    |  |                          |       |   |      |  |       |      |  |  |       |  
|Net other operating income and expenses             |  |                          | (0.1  | ) |      |  | (0.4  | )    |  |  | (0.6  | )
|                                                    |  |                          |       |   |      |  |       |      |  |  |       |  
|Operating income                                    |  |                          | 3.3   |   |      |  | 7.2   |      |  |  | 7.5   |  
|Non-operating income and expenses                   |  |                          | 8.3   |   |      |  | 2.5   |      |  |  | 1.9   |  
|                                                    |  |                          |       |   |      |  |       |      |  |  |       |  
|Income from continuing operations before income tax |  |                          | 11.6  |   |      |  | 9.7   |      |  |  | 9.4   |  
|Income tax expense                                  |  |                          | (1.8  | ) |      |  | (2.2  | )    |  |  | (0.7  | )
|                                                    |  |                          |       |   |      |  |       |      |  |  |       |  
|Net income                                          |  |                          | 9.8   |   |      |  | 7.5   |      |  |  | 8.7   |  
|Total other comprehensive income (loss), net of tax |  |                          | 0.1   |   |      |  | 4.3   |      |  |  | (0.7  | )
|                                                    |  |                          |       |   |      |  |       |      |  |  |       |  
|Total comprehensive income (loss)                   |  |                          | 9.9   |   |      |  | 11.8  |      |  |  | 8.0   |  
|                                                    |  |                          |       |   |      |  |       |      |  |  |       |  
|Net income attributable to:                         |  |                          |       |   |      |  |       |      |  |  |       |  
|Stockholders of the parent                          |  |                          | 10.2  |   |      |  | 7.9   |      |  |  | 9.2   |  
|Non-controlling interests                           |  |                          | (0.4  | ) |      |  | (0.4  | )    |  |  | (0.5  | )
|Total comprehensive income (loss) attributable to:  |  |                          |       |   |      |  |       |      |  |  |       |  
|Stockholders of the parent                          |  |                          | 10.3  |   |      |  | 12.2  |      |  |  | 8.5   |  
|Non-controlling interests                           |  |                          | (0.4  | ) |      |  | (0.4  | )    |  |  | (0.5  | )

We obtained a controlling interest in Best Elite in 2013, and therefore its results of its operations have
been included in our consolidated financial statements since 2013. We integrated our operating resources with Best Elite to reach cooperative synergy and provide enhanced manufacturing solutions to customers that help increase the competiveness of
their products. As a result of our acquisition, Best Elites operational efficiency has improved with the integration of its assets with our advanced technologies and manufacturing platforms as well as leveraging on our purchasing power, which
contributed to the gradual increase in Best Elites operating income since 2013.

Year Ended December 31, 2015 Compared to Year Ended December
31, 2014

Net operating revenues. Net operating revenues increased by 3.4% from NT$140,012 million in 2014 to
NT$144,830 million (US$4,417 million) in 2015, primarily due to increased demand in leading edge technologies which resulted in a 5.2% increase in foundry wafer shipments from 5,577 thousand 8-inch equivalent wafers in 2014 to 5,868 thousand 8-inch
equivalent wafers in 2015, and a higher average selling price in 2015 which increased approximately 1.1% from 2014. These increases were partially offset by a perpetual 40nm licensing fee from Fujitsu recognized in 2014.

Operating costs. Operating costs increased by 4.5% from NT$108,159 million in 2014 to NT$113,061 million (US$3,448 million) in
2015, primarily due to the increased depreciation expense and increase in shipments in response to capacity expansion and increased customer demand.

Gross profit and gross margin. Gross profit decreased from NT$31,853 million in 2014 to NT$31,769 million (US$969 million) in
2015. Our gross margin decreased from 22.8% in 2014 to 21.9% in 2015, primarily due to the increased depreciation expense and a perpetual 40nm licensing fee from Fujitsu recognized in 2014.



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Operating income and operating margin. Operating income increased from NT$10,076
million in 2014 to NT$10,836 million (US$331 million) in 2015. Our operating margin increased from 7.2% in 2014 to 7.5% in 2015. The increase in operating margin was largely due to the increase in sales revenues and decrease in research and
development expenses. Operating expenses decreased by 6.0% from NT$21,238 million in 2014 to NT$19,969 million (US$609 million) in 2015.

Sales and marketing expenses. Our sales and marketing expenses increased by 1.3% from NT$4,012 million in 2014 to NT$4,064
million (US$124 million) in 2015. The increase in sales and marketing expenses was mainly due to an increase of NT$110 million (US$3 million) in sample expenses, NT$72 million (US$2 million) in intellectual property royalty expenses as a result of
the increased number of intellectual properties under which we were granted licenses, which was partially offset by a decrease of NT$96 million (US$3 million) in conveyance and exporting expenses. Our sales and marketing expenses as a percentage of
our net operating revenues decreased from 2.9% in 2014 to 2.8% in 2015.

General and administrative expenses. Our general
and administrative expenses increased by 4.7% from NT$3,562 million in 2014 to NT$3,730 million (US$114 million) in 2015, primarily as a result of an increase of NT$120 million (US$4 million) in professional fee and NT$36 million (US$1 million) in
personnel expenses. Our general and administrative expenses as a percentage of our net operating revenues were 2.5% and 2.6% in 2014 and 2015, respectively.

Research and development expenses. Our research and development expenses decreased by 10.9% from NT$13,664 million in 2014 to
NT$12,175 million (US$371 million) in 2015 as a research program of advanced technologies came to a conclusion in 2014. Our research and development expenses as a percentage of our net operating revenues decreased from 9.8% in 2014 to 8.4% in 2015.

Net other operating income and expenses. Net other operating expenses increased by 78.8% from NT$539 million in 2014 to
NT$964 million (US$29 million) in 2015, mainly due to an increase in impairment loss of property, plant, and equipment from NT$597 million in 2014 to NT$1,021 million (US$31 million) in 2015. Net other operating expenses as a percentage of our net
operating revenues increased from 0.4% in 2014 to 0.6% in 2015.

Non-operating income and expenses. Non-operating income
decreased by 19.0% from NT$3,496 million in 2014 to NT$2,833 million (US$86 million) in 2015, mainly due to the increase in the impairment loss of available-for-sale financial assets from NT$177 million in 2014 to NT$1,239 million (US$38 million) in
2015, partially offset by the decrease in the impairment loss of financial assets measured at cost from NT$128 million in 2014 to NT$7 million (US$0.21 million) in 2015, and an increase in the other gains from NT$474 million in 2014 to NT$757
million (US$23 million) in 2015.

Other comprehensive income (loss), net of tax.Our other comprehensive income (loss), net
of tax, decreased from an income of NT$6,069 million in 2014 to a loss of NT$1,065 million (US$32 million) in 2015, We attributed this change primarily to the decrease in the income of exchange differences on translation of foreign operations from
NT$4,330 million in 2014 to NT$2,764 million (US$84 million) in 2015, the decrease in an unrealized gain (loss) on available-for-sale financial assets from a gain of NT$1,465 million in 2014 to a loss of NT$3,479 million (US$106 million) in 2015,
the decrease in remeasurements of defined benefit pension plans from a loss of NT$2 million in 2014 to a loss of NT$33 million (US$1 million) in 2015, and the decrease in share of other comprehensive income (loss) of associate and joint ventures
from an income of NT$277 million in 2014 to a loss of NT$316 million (US$10 million) in 2015.

Net income attributable to the
stockholders of the parent. Due to the factors described above, our net income increased by 19.3% from NT$11,109 million in 2014 to NT$13,254 million (US$404 million) in 2015.

Total comprehensive income attributable to the stockholders of the parent. Due to the factors described above, ourcomprehensive income decreased by 28.1% from NT$17,035 million in 2014 to NT$12,251 million (US$374 million) in 2015.



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Year Ended December 31, 2014 Compared to Year Ended December 31, 2013

Net operating revenues. Net operating revenues increased by 13.1% from NT$123,812 million in 2013 to NT$140,012 million in 2014,
primarily due to the increased demand from our customers, resulting in a 11.6% increase in foundry wafer shipments from 4,997 thousand 8-inch equivalent wafers in 2013 to 5,577 thousand 8-inch equivalent wafers in 2014, and a perpetual 40nm
licensing fee from Fujitsu.

Operating costs. Operating costs increased by 7.9% from NT$100,249 million in 2013 to
NT$108,159 million in 2014, primarily due to the net effect of the increase in shipments and the higher capacity utilization in response to the increased customer demand.

Gross profit and gross margin. Gross profit increased from NT$23,563 million in 2013 to NT$31,853 million in 2014. Our gross
margin increased from 19.0% in 2013 to 22.8% in 2014, primarily due to the higher capacity utilization in response to the increased customer demand and a perpetual 40nm licensing fee from Fujitsu.

Operating income and operating margin. Operating income increased from NT$4,032 million in 2013 to NT$10,076 million in 2014.
Our operating margin increased from 3.3% in 2013 to 7.2% in 2014. The increase in operating margin was largely due to the increase in gross margin, partially offset by the increase in operating expenses and net other operating expenses. Operating
expenses increased by 9.4% from NT$19,406 million in 2013 to NT$21,238 million in 2014.

Sales and marketing expenses. Our
sales and marketing expenses increased by 23.5% from NT$3,247 million in 2013 to NT$4,012 million in 2014. The increase in sales and marketing expenses was mainly due to an increase of NT$600 million in intellectual property royalty expenses as a
result of the increased number of intellectual property under which we are granted licenses. Our sales and marketing expenses as a percentage of our net operating revenues increased from 2.6% in 2013 to 2.9% in 2014.

General and administrative expenses. Our general and administrative expenses slightly decreased by 2.8% from NT$3,666 million in
2013 to NT$3,562 million in 2014, primarily as a result of the decrease in employee welfare expenses, which was mainly due to deconsolidation of UMCJ in 2013. Our general and administrative expenses as a percentage of our net operating revenues were
2.9% and 2.5% in 2013 and 2014, respectively.

Research and development expenses. Our research and development expenses
increased by 9.4% from NT$12,493 million in 2013 to NT$13,664 million in 2014. The increase in research and development expenses resulted primarily from an increase of NT$490 million in personnel expenses, NT$460 million in research expenses for
advanced technologies, NT$290 million in depreciation on the equipment used for research and development. Our research and development expenses as a percentage of our net operating revenues decreased from 10.1% in 2013 to 9.8% in 2014.

Net other operating income and expenses. Net other operating expenses increased by 331.2% from NT$125 million in 2013 to NT$539
million in 2014, mainly due to an impairment loss of property, plant and equipment of NT$597 million in 2014, all of which came from new business segment. Net other operating expenses as a percentage of our net operating revenues increased from 0.1%
in 2013 to 0.4% in 2014.

Non-operating income and expenses. Non-operating income decreased by 66.1% from NT$10,309 million
in 2013 to NT$3,496 million in 2014, mainly due to a bargain purchase gain of NT$7,154 million in 2013.

Other comprehensive income
(loss), net of tax.Our other comprehensive income increased from NT$198 million in 2013 to NT$6,069 million in 2014. We attributed this change primarily to the increase in the income of exchange differences on translation of foreign
operations from NT$270 million in 2013 to NT$4,330 million in 2014, and the increase in an unrealized gain on available-for-sale financial assets from a loss of NT$784 million in 2013 to a gain of NT$1,465 million in 2014, partially offset by the
decrease in remeasurements of defined benefit pension plans from an income of NT$379 million in 2013 to a loss of NT$2 million in 2014.



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Net income attributable to the stockholders of the parent. Due to the factors
described above, our net income decreased by 11.9% from NT$12,609 million in 2013 to NT$11,109 million in 2014.

Total comprehensive
income attributable to the stockholders of the parent. Due to the factors described above, ourcomprehensive income increased by 33.1% from NT$12,796 million in 2013 to NT$17,035 million in 2014.



|B. | Liquidity and Capital Resources
|-- | -------------------------------

The foundry business is highly capital intensive. Our
development over the past three years has required significant investments. Additional expansion for the future generally will continue to require significant cash for acquisition of plant and equipment to support increased capacities, particularly
for the production of 12-inch wafers, although our expansion program will be adjusted from time to time to reflect market conditions. In addition, the semiconductor industry has historically experienced rapid changes in technology. To maintain
competitiveness at the same capacity, we are required to make adequate investments in plant and equipment. In addition to our need for liquidity to support the large fixed costs of capacity expansion and the upgrading of our existing plants and
equipment for new technologies, as we ramp up production of new plant capacity, we require significant working capital to support purchases of raw materials for our production and to cover variable operating costs such as salaries until production
yields provide sufficiently positive margins for a fabrication facility to produce operating cash flows.

We incurred capital expenditures
of NT$32,911 million, NT$43,237 million and NT$60,504 million (US$1,845 million) in 2013, 2014 and 2015, respectively. Constructing a fab requires a significant amount of funding from financing activities. Once a fab is in operation at acceptable
capacity and yield rates, it can provide significant cash flows.

We have financed our capital expenditure requirements in recent years
from operating cash inflows as well as from bank borrowings, the issuance of bonds and equity-linked securities denominated in NT dollars and U.S. dollars. Operating cash inflows significantly exceed operating income, reflecting the significant
non-cash depreciation expense. We generated cash flows from operations of NT$43,472 million, NT$44,788 million and NT$60,043 million (US$1,831 million) in 2013, 2014 and 2015, respectively.

On May 24, 2011, we issued US$500 million aggregate principal amount of currency linked zero coupon convertible bonds due 2016. Each bond, at
the option of the holder, will be convertible into our ADSs. The proceeds of this offering were used for purchasing machinery and equipment. As of December 31, 2013, no bonds had been converted into our ADSs, and we had repurchased and cancelled
US$142 million principal amount of these bonds in the open market transactions in prior years. On May 27, 2014, we redeemed US$324 million principal amount of these bonds as requested by investors and on June 27, 2014, we further redeemed another
US$34 million principal amount of these bonds, which represented all of the remaining outstanding bonds. As of June 27, 2014, all of our currency linked zero coupon bonds due 2016 were redeemed.

In early June 2012, we issued five-year and seven-year domestic unsecured corporate bonds totaling NT$10,000 million, with a face value of
NT$1 million per unit. The five-year domestic unsecured corporate bond was issued in the amount of NT$7,500 million. Interest will be paid annually at 1.43%, and the principal will be repayable in June 2017 upon maturity. The seven-year domestic
unsecured corporate bond was issued in the amount of NT$2,500 million. Interest will be paid annually at 1.63%, and the principal will be repayable in June 2019 upon maturity. The proceeds of this offering are used for purchasing machinery and
equipment. As of December 31, 2015, NT$10,000 million aggregate principal amount of these bonds were outstanding.

In mid-March 2013, we
issued another five-year and seven-year domestic unsecured corporate bonds totaling NT$10,000 million, with a face value of NT$1 million per unit. The five-year domestic unsecured corporate bond was issued in the amount of NT$7,500 million. Interest
will be paid annually at 1.35%, and the principal will be repayable in March 2018 upon maturity. The seven-year domestic unsecured corporate bond was issued in the amount of NT$2,500 million. Interest will be paid annually at 1.50%, and the
principal will be repayable in March 2020 upon maturity. The proceeds of this offering are used for purchasing machinery and equipment. As of December 31, 2015, NT$10,000 million aggregate principal amount of these bonds were outstanding.



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In mid-June 2014, we issued an aggregate principal amount of NT$5,000 million of seven-year and
ten-year domestic unsecured corporate bonds, with a denomination of NT$1 million per bond. The seven-year domestic unsecured corporate bond was issued with an aggregate principal amount of NT$2,000 million with an annual coupon bearing an interest
rate of 1.7%. The ten-year domestic unsecured corporate bond was issued with an aggregate principal amount of NT$3,000 million with an annual coupon bearing an interest rate of 1.95%. The proceeds of this offering were used for repay debts. As
of December 31, 2015, NT$5,000 million aggregate principal amount of these bonds were outstanding.

In mid-May 2015, we issued five-year
US$600 million aggregate principal amount of currency linked zero coupon convertible bonds due 2020. Each bond, at the option of the holder, were convertible into our common shares at NT$16.7408 per share on December 31, 2015. The proceeds of this
offering were used for purchasing machinery and equipment. As of December 31, 2015, no bonds had been converted or redeemed.

As of
December 31, 2015, we had NT$53,290 million (US$1,625 million) of cash and cash equivalents and NT$665 million (US$20 million) of financial assets at fair value through profit or loss, current. Cash equivalents included time deposits and commercial
paper with original maturities of three months or less and repurchase agreements collateralized by government bonds and corporate bonds. These agreements bore interest rates ranging from 0.48% to 0.56%, 0.48% to 0.51% and 0.34% to 0.44% in 2013,
2014 and 2015, respectively. The terms of these agreements were typically less than one month. As of December 31, 2013, 2014 and 2015, we held repurchase agreements in the amount of NT$5,669 million, NT$4,526 million and NT$4,860 million (US$148
million), respectively.

We believe that our working capital, cash inflows from operations and unused lines of credit are sufficient for
our present requirements.

At our 2015 annual general meeting, our stockholders authorized our board of directors to raise capital from
private placement, through issuing instruments such as common shares, depositary receipts (including but not limited to ADS), or Euro/Domestic convertible bonds (including secured or unsecured corporate bonds), based on market conditions and our
needs. The amount of common shares issued or convertible is proposed to be no more than 10% of our issued and outstanding share capital (i.e., no more than 1,272,520,779 common shares. According to Item 6, Article 43-6 of the R.O.C. Security and
Exchange Act, any private placement of our common shares must be conducted separately within one year after approval at the annual general meeting of stockholders. The approval to conduct a private placement of our common shares will expire on June
8, 2016. Considering market conditions, our board of directors has resolved to terminate any plans for a private placement of our common shares under the 2015 general meeting authorization.

Operating Activities

Net
cash generated by operating activities increased from NT$44,788 million in 2014 to NT$60,043 million (US$1,831 million) in 2015, attributed to increased demand in leading edge technologies and a higher average selling price in 2015 which generated
higher operating revenue, leading to an increase in cash collected from our customers. Net cash generated by operating activities increased from NT$43,472 million in 2013 to NT$44,788 million in 2014.

Investing Activities

Net
cash used in our investing activities increased from NT$42,606 million in 2014 to NT$68,736 million (US$2,096 million) in 2015, primarily due to the cash used to purchase equipment at our fabs which increased from NT$43,237 million in 2014 to
NT$60,504 million (US$1,845 million) in 2015. Net cash used in our investing activities increased from NT$31,516 million in 2013 to NT$42,606 million in 2014, primarily due to the cash we used to purchase equipment at our fabs increased from
NT$32,911 million in 2013 to NT$43,237 million in 2014.



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Financing Activities

Net cash provided by financing activities was NT$15,049 million (US$459 million) in 2015, compared to net cash used in financing activities of
NT$8,258 million in 2014, primarily due to the redemption of bonds of NT$14,137 million in 2014 and an increase in proceeds from bonds issued from NT$5,000 million in 2014 to NT$18,425 million (US$562 million) in 2015 and increase in other financial
liabilities of NT$6,108 million (US$186 million) in 2015. Such increase in net cash provided was partially offset by an increase in bank loans of NT$6,560 million in 2014 and the drawing down of bank loans of NT$320 million (US$10 million) in 2015,
as well as the acquisition of treasury stock of NT$2,203 million (US$67 million) in 2015.

Net cash used in our financing activities
increased from NT$3,924 million in 2013 to NT$8,258 million in 2014, primarily due to an increase in redemption of bonds from NT$2,153 million in 2013 to NT$14,137 million in 2014, a decrease in proceeds from bonds issued from NT$10,000 million in
2013 to NT$5,000 million in 2014 and the increase in cash dividends and cash paid from additional paid-in capital from NT$5,061 million in 2013 to NT$6,253 million in 2014. Such increase in net cash used was partially offset by drawing down bank
loans of NT$4,684 million in 2013 and an increase in bank loans of NT$6,560 million in 2014, as well as our acquisition of treasury stock of NT$2,245 million in 2013.

We had NT$5,505 million (US$168 million) outstanding short-term loans as of December 31, 2015. We had total availability under existing
short-term lines of credit of NT$35,863 million (US$1,094 million) as of December 31, 2015.

We had bonds payable of NT$41,637 million
(US$1,270 million) in the aggregate as of December 31, 2015.

As of December 31, 2015, our outstanding long-term debts primarily consisted
of NT$3,333 million (US$102 million) unsecured long-term bank loans due in 2016, NT$4,969 million (US$152 million) unsecured and NT$104 million (US$3 million) secured long-term bank loans due in 2017, NT$1,423 million (US$43 million) unsecured and
NT$114 million (US$3 million) secured long-term bank loans due in 2018, NT$1,000 million (US$30 million) unsecured long-term bank loans due in 2019, and NT$1,385 million (US$42 million) unsecured and NT$58 million (US$2 million) secured long-term
bank loans due in 2020, and NT$110 million (US$3 million) secured long-term bank loans due in 2025. The interest rates of our long-term bank loans range from 1.10% to 2.95%.

As of December 31, 2015, we had no current portion of bonds due within one year. As of the same date, the current portion of long-term bank
loans due within one year was NT$6,602 million (US$201 million).

Capital Expenditures

We have continued to expand our manufacturing capacity, especially our 40 nanometer and 28 nanometer technology processes. As a result, our
capital expenditures have been used for expanding our factory space and purchasing equipment for both research and development and production purposes. We have entered into several construction contracts for the expansion of our factory space in
Taiwan and China. As of December 31, 2015, these construction contracts amounted to NT$26,867 million (US$819 million) and the portion of the contracts not yet recognized was approximately NT$12,796 million (US$390 million). In 2013, 2014 and 2015,
we spent approximately NT$32,911 million, NT$43,237 million and NT$60,504 million (US$1,845 million), respectively, primarily to purchase equipment for research and development and production purposes.

We continue to maintain high levels of capital expenditures as we believe there are promising opportunities for 28-nanometer and 40-nanometer
technologies. We continue to devote most of our capital expenditure to improvement of advanced technology within 12-inch fabs. We will focus on our addressable markets (i.e., 40 & 28-nanometer) and continue to build up our production capacity.
We believe our 28-nanometer technology progress will propel our advanced process growth, strengthen our future competitiveness, and enhance our portfolio of comprehensive foundry solutions available to our customers.



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We believe that our existing cash and cash equivalents and short-term investments will be
sufficient to meet our working capital and capital expenditure requirements at least through the end of 2016. Due to rapid changes in technology in the semiconductor industry, however, we have frequent demand for investment in new manufacturing
technologies. We cannot assure you that we will be able to raise additional capital, should that become necessary, on terms acceptable to us, or at all. If financing is not available on terms acceptable to us, management intends to reduce
expenditures so as to delay the need for additional financing. To the extent that we do not generate sufficient cash flows from our operations to meet our cash requirements, we may rely on external borrowings and securities offerings to finance our
working capital needs or our future expansion plans. The sale of additional equity or equity-linked securities may result in additional dilution to our stockholders. Our ability to meet our working capital needs from cash flow from operations will
be affected by the demand for our products and change in our product mix, which in turn may be adversely affected by several factors. Many of these factors are beyond our control, such as economic downturns and declines in the average selling price
of our products. The average selling price of our products have been subjected to downward pressure in the past and are reasonably likely to be subject to further downward pressure in the future. We have not historically relied on, and we do not
plan to rely on in the foreseeable future, off-balance sheet financing arrangements to finance our operations or expansion.

Transactions with Related
Parties

See Item 7. Major Stockholders and Related Party TransactionsB. Related Party Transactions and Note 7 to our
audited consolidated financial statements included in this annual report.

Inflation/Deflation

We do not believe that inflation in the R.O.C. has had a material impact on our results of operations.



|C. | Research, Development, Patents and Licenses, Etc.
|-- | -------------------------------------------------

The semiconductor industry is
characterized by rapid changes in technology, frequently resulting in obsolescence of process technologies and products. As a result, effective research and development is essential to our success. We invested approximately NT$12,493 million,
NT$13,664 million and NT$12,175 million (US$371 million) in 2013, 2014 and 2015, respectively, in research and development, which represented 10.1%, 9.8% and 8.4%, respectively, of net operating revenues for such years. We believe that our
continuous spending on research and development will help us maintain our position as a technological leader in the foundry industry. As of March 31, 2016, we employed 1,597 professionals in our research and development division.

Our current research and development activities seek to upgrade and integrate manufacturing technologies and processes, as well as to drive 28
nanometer High-k/metal gate technology in mass production, and to develop 14 nanometer technology including EUV (Extreme Ultraviolet) lithography, and FinFET (Fin Field-Effect Transistor). Although we emphasize firm-wide participation in the
research and development process, we maintain central research and development teams primarily responsible for developing cost-effective technologies that can serve the manufacturing needs of our customers. Monetary incentives are provided to our
employees if projects result in successful patents. We believe we have a strong foundation in research and development and intend to continue our efforts on technology developments. Our top management believes in the value of continued support of
research and development efforts and intends to continue our foundry leadership position by providing customers with comprehensive technology and SoC solutions in the industry.



|D. | Trend Information
|-- | -----------------

Please refer to Item 5. Operating and Financial Review and
ProspectsOverview for a discussion of the most significant recent trends in our production, sales, costs and selling prices. In addition, please refer to discussions included in this Item for a discussion of known trends, uncertainties,
demands, commitments and events that we believe are reasonably likely to have a material effect on our net operating revenues, income from continuing operations, profitability, liquidity or capital resources, or that would cause reported financial
information not necessarily to be indicative of future operating results or financial condition.



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|E. | Off-balance Sheet Arrangements
|-- | ------------------------------

We do not generally provide letters of credit to, or
guarantees for, or engage in any repurchase financing transactions with any entity other than our consolidated subsidiaries. We have, from time to time, entered into foreign currency forward contracts to hedge our existing assets and liabilities
denominated in foreign currencies and identifiable foreign currency purchase commitments. We do not engage in any speculative activities using derivative instruments. See Item 11. Quantitative and Qualitative Disclosure About Market
Risk.



|F. | Tabular Disclosure of Contractual Obligations
|-- | ---------------------------------------------

The following table sets forth our
contractual obligations and commitments with definitive payment terms on a consolidated basis which will require significant cash outlays in the future as of December 31, 2015.



|                                   |  |                        |        |  |                 |  |        |           |  |  |           |  |  |              |        |  |  |  |        | 
|---------------------------------- |  | ---------------------- | ------ |  | --------------- |  | ------ | --------- |  |  | --------- |  |  | ------------ | ------ |  |  |  | ------ | 
|                                   |  | Payments Due by Period |       
|                                   |  | Total                  |        |  | Less than1 Year |  |        | 1-3 Years |  |  | 4-5 Years |  |  | After5 Years |       
|                                   |  | (in NT$ millions)      |       
|Long-term debt(1)                  |  |                        |        |  |                 |  |        |           |  |  |           |  |  |              |        |  |  |  |        | 
|Unsecured bonds                    |  |                        | 43,196 |  |                 |  |       |           |  |  | 15,000    |  |  |              | 23,196 |  |  |  | 5,000  | 
|Long-term loans                    |  |                        | 12,496 |  |                 |  | 6,602  |           |  |  | 4,043     |  |  |              | 1,792  |  |  |  | 59     | 
|Operating lease obligations (2)    |  |                        | 3,952  |  |                 |  | 348    |           |  |  | 547       |  |  |              | 488    |  |  |  | 2,569  | 
|Purchase obligations (3)           |  |                        | 18,503 |  |                 |  | 13,275 |           |  |  | 1,034     |  |  |              | 879    |  |  |  | 3,315  | 
|Other long-term obligations (4)    |  |                        | 6,133  |  |                 |  | 5,923  |           |  |  | 155       |  |  |              |       |  |  |  | 55     | 
|                                   |  |                        |        |  |                 |  |        |           |  |  |           |  |  |              |        |  |  |  |        | 
|Total contractual cash obligations |  |                        | 84,280 |  |                 |  | 26,148 |           |  |  | 20,779    |  |  |              | 26,355 |  |  |  | 10,998 | 
|                                   |  |                        |        |  |                 |  |        |           |  |  |           |  |  |              |        |  |  |  |        | 



|(1) | Assuming the domestic bonds are paid off upon maturity.
|--- | -------------------------------------------------------

|(2) | Represents our obligations to make lease payments to use machineries, equipment and land on which our fabs are located, primarily in the Hsinchu Science Park and the Tainan Science Park in Taiwan, Pasir Ris Wafer Fab
Park in Singapore.
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(3) | Represents commitments for purchase of raw materials and construction contracts. These commitments are not recorded on our balance sheet as of December 31, 2015.
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------

|(4) | Represents intellectual properties and royalties payable under our technology license agreements. The amounts of payments due under these agreements are determined based on fixed contract amounts.
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|ITEM 6. | DIRECTORS, SENIOR MANAGEMENT AND EMPLOYEES
|------- | ------------------------------------------



|A. | Directors and Senior Management
|-- | -------------------------------

The following table sets forth the name, age, position,
tenure and biography of each of our directors and executives as of March 31, 2016. There is no family relationship among any of these persons.

The business address of our directors and executive officers is the same as our registered address.



|                    |  |     |  |                                                                                           |  |               
|------------------- |  | --- |  | ----------------------------------------------------------------------------------------- |  | --------------
|Name                |  | Age |  | Position                                                                                  |  | Year(s)with Us
|Stan Hung           |  | 55  |  | Chairman, Director and Chief Strategy Officer                                             |  | 24            
|Po-Wen Yen          |  | 59  |  | Chief Executive Officer and Director (Representative of Hsun Chieh Investment Co.)        |  | 29            
|Jason S. Wang       |  | 53  |  | Director (Representative of Silicon Integrated Systems Corp.) and Senior Vice President   |  | 8             
|Shan-Chieh Chien    |  | 58  |  | Director (Representative of UMC Science and Culture Foundation) and Senior Vice President |  | 27            
|Ting-Yu Lin         |  | 54  |  | Director                                                                                  |  | 10            
|Chung-Laung Liu (1) |  | 82  |  | Independent Director                                                                      |  | 10            
|Chun-Yen Chang (1)  |  | 79  |  | Independent Director                                                                      |  | 10            
|Cheng-Li Huang (1)  |  | 67  |  | Independent Director                                                                      |  | 7             
|Wenyi Chu (1)       |  | 49  |  | Independent Director                                                                      |  | 1             
|Chitung Liu         |  | 50  |  | Chief Financial Officer                                                                   |  | 15            



|(1) | Member of the Audit Committee.
|--- | ------------------------------



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Stan Hung is a director, the Chief Strategy Officer and the Chairman of our company. Mr.
Hung was our Chief Financial Officer and senior vice president from 2000 to 2007. He was also the Chairman of Epitech Technology Corporation in 2007 and ITE Technology Corporation for a portion of 2008, respectively. Prior to re-joining United
Microelectronics Corporation in 1991, Mr. Hung was a financial manager at Optoelectronics Corporation. He is also the Chairman of Fortune Venture Capital Corporation, TLC Capital Co., Ltd., Faraday Technology Corporation, UMC New Business Investment
Corporation, and a Director of Epistar Corporation and Altek Corporation as well as an independent director of United BioPharma, Inc. Mr. Hung received a bachelors degree in accounting from Tam Kang University in 1982.

Po-Wen Yen is a director of our company and our Chief Executive Officer. Prior to becoming our Chief Executive Officer, Mr. Yen was our
senior vice president responsible for 12-inch operations. Mr. Yen is a representative of Hsun Chieh Investment Co. Mr. Yen joined us in 1986 and was responsible for the operation of Fabs 8A and 8C. He also served as the vice president for UMC-SG,
our 300mm operation in Singapore. He is also a director of Fortune Venture Capital Corporation, TLC Capital Co., Ltd. and UMC New Business Investment Corporation. In 2003, Mr. Yen received the National Manager Excellence Award from Chinese
Professional Management Association. Mr. Yen earned a bachelors degree in Chemical Engineering from National Tsing Hua University and his masters degree in chemical engineering from National Taiwan University.

Jason S. Wang is a director of our company and our senior vice president. Mr. Wang is a representative of Silicon Integrated Systems
Corp. and also serves on the board of directors of UMC GROUP (USA) since 2004. Mr. Wang joined UMC as Vice President of Corporate Marketing in 2008, and from 2009 to 2014, served as President of UMC GROUP (USA) responsible for business operation
efficiency enhancement and UMC North America strategic business development. Mr. Wang is also a director of Fortune Venture Capital Corporation and TLC Capital Co., Ltd. Mr. Wang did his undergraduate study in Business Administration at San Jose
State University.

Shan-Chieh Chien is a director of our company and our senior vice president. Mr. Chien is a representative of
UMC Science and Culture Foundation and he is also a director of UMC New Business Investment Corp. and Asia Pacific Microsystems, Inc. Mr. Chien received a bachelors degree in chemical engineering from National Taiwan University.

Ting-Yu Lin is a director of our company. Mr. Lin is also the chairman of Sunrox International Inc. Mr. Lin received a masters
degree in international finance from Meiji University in 1993.

Chung-Laung Liu is an independent director of our company.
Professor Liu is the William M.W. Mong Honorary Chair Professor of National Tsing Hua University, Taiwan. Professor Liu is also the Chairman of TrendForce Corp., a supervisor of Andes Technology Corporation, an independent director of Richteck
Technology Corp., Powerchip Semiconductor Corp., Far EasTone Telecommunications., and United BioPharma Inc., as well as a director of Macronix International Co., Ltd. Professor Liu received a doctorate degree in science from Massachusetts Institute
of Technology in 1962.

Chun-Yen Chang is an independent director of our company. Professor Chang is an academician of Academia
Sinica and a chair professor and president of National Chiao Tung University, Taiwan. Professor Chang is also an independent director of BizLink Holding Inc. and GlobalWafers Co., Ltd. Professor Chang received a Ph.D. degree in electrical
engineering from National Chiao Tung University in 1970.

Cheng-Li Huang is an independent director of our company. Dr. Huang was a
professor of Tamkang University and served as its Comptroller. He was also the chief executive of Tamkang Accounting Education Foundation and the publisher of Journal of Contemporary Accounting. Professor Huang is also a supervisor of Win
Semiconductors Corp. Professor Huang received a Ph.D. degree in accounting from University of Warwick in 1999.

Wenyi Chuis an
independent director of our company. Professor Chu is a professor of business administration at National Taiwan University. Professor Chu was the chairwoman of Graduate Institute of Business Administration and Department of Business Administration
in National Taiwan University from 2012 to 2014. Professor Chu received a Ph.D. degree in Strategy and International Management from London Business School, United Kingdom in 1997.



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Chitung Liu is the Chief Financial Officer of our company. Prior to joining our company in
2001, Mr. Liu was a managing director of UBS. Mr. Liu is also a director of Unimicron Corporation, UMC New Business Investment Corporation, Fortune Venture Capital Corporation, TLC Capital Co., Ltd. and Novatek Microelectronic Corp. Mr. Liu received
an executive MBA degree from National Taiwan University in 2009.



|B. | Compensation
|-- | ------------

The aggregate compensation paid and benefits in kind granted to our
directors in 2015 were approximately NT$41.9 million. The remuneration was out of our 2015 earnings distribution plan, and the distribution percentage for directors is 0.3%. See Item 10. Additional InformationB. Memorandum and Articles
of AssociationDividends and Distributions. Some of the remuneration was paid to the legal entities that certain directors represent. The aggregate compensation paid and benefits in kind granted to our executive officers in 2015 were
approximately NT$221.9 million, which include NT$54 million as bonus. Certain of our directors who also served as executive officers held stock options, however, all stock options expired on June 18, 2015.



|C. | Board Practices
|-- | ---------------

All of our directors were elected in June 2015 for a term of three
years except for Mr. Shan-Chieh Chien as he was reassigned as a juristic-person director by the UMC Science and Culture Foundation in March 2016 and will serve for a term of three years. Neither we nor any of our subsidiaries has entered into a
contract with any of our directors by which our directors are expected to receive benefits upon termination of their employment.

Our
board of directors established an audit committee in March 2005. In the annual ordinary stockholders meeting held on June 13, 2008, we amended our articles of incorporation to introduce the mechanism of an Audit Committee. See Item
10. Additional InformationB. Memorandum and Articles of AssociationDirectors. After the re-election of directors in the stockholders meeting on June 9, 2015, our board of directors appointed Chung-Laung Liu, Chun-Yen Chang,
Cheng-Li Huang and Wenyi Chu to be the members of the audit committee. Each audit committee member is an independent director who is financially literate with accounting or related financial management expertise. The audit committee meets as often
as it deems necessary to carry out its responsibilities. Pursuant to an audit committee charter, the audit committee has responsibility for, among other things, overseeing the qualifications, independence and performance of our internal audit
function and independent auditors, and overseeing the accounting policies and financial reporting and disclosure practices of our company. The audit committee also has the authority to engage special legal, accounting or other consultants it deems
necessary in the performance of its duties.

Remuneration Committee

The R.O.C. Securities and Exchange Act, as amended on November 24, 2010, further introduced the mechanism of a Remuneration
Committee, which requires all the publicly listed companies in the R.O.C., including our company, to adopt a remuneration committee. On March 18, 2011, R.O.C. FSC promulgated the Regulations Governing the Establishment and Exercise of Powers
by Compensation Committees of Public Companies, according to which, public listed companies of our size shall set up the remuneration committee no later than September 30, 2011 and the remuneration committee shall be composed of no less than three
members commissioned by the board of directors. In addition, for a company with independent directors, such as us, at least one of the remuneration committee members shall be the independent director of such company. We established a remuneration
committee in accordance with Article 14-6 of the R.O.C. Securities and Exchange Act on April 27, 2011. We amended our articles of incorporation to implement the mechanism of our remuneration committee during the annual ordinary stockholders
meeting held on June 15, 2011. After the re-election of directors in the stockholders meeting on June 9, 2015, our board of directors appointed Chung-Laung Liu, Chun-Yen Chang, Cheng-Li Huang and Wenyi Chu to be the members of the remuneration
committee.



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In November 2003, the Securities and Exchange Commission approved changes to the NYSEs
listing standards related to the corporate governance practices of listed companies. Under these rules, listed foreign private issuers, like us, must disclose any significant ways in which their corporate governance practices differ from those
followed by NYSE-listed U.S. domestic companies under the NYSEs listing standards. A copy of the significant differences between our corporate governance practices and NYSE corporate governance rules applicable to U.S. companies is available
on our website http://www.umc.com/English/investors/Corp_gov_difference.asp.



|D. | Employees
|-- | ---------

As of March 31, 2016, we had 18,458 employees, which includes 10,792
engineers, 6,821 technicians and 845 administrative staff performing administrative functions on a consolidated basis. We have in the past implemented, and may in the future evaluate the need to implement, labor redundancy plans based on the work
performance of our employees.



|                     |  |                    |        |  |      |  |        |      |  |  |        | 
|-------------------- |  | ------------------ | ------ |  | ---- |  | ------ | ---- |  |  | ------ | 
|                     |  | As of December 31, |       
|                     |  | 2013               |        |  | 2014 |  |        | 2015 | 
|Employees            |  |                    |        |  |      |  |        |      |  |  |        | 
|Engineers            |  |                    | 9,698  |  |      |  | 10,272 |      |  |  | 10,750 | 
|Technicians          |  |                    | 7,232  |  |      |  | 7,558  |      |  |  | 6,796  | 
|Administrative Staff |  |                    | 854    |  |      |  | 793    |      |  |  | 843    | 
|                     |  |                    |        |  |      |  |        |      |  |  |        | 
|Total                |  |                    | 17,784 |  |      |  | 18,623 |      |  |  | 18,389 | 
|                     |  |                    |        |  |      |  |        |      |  |  |        | 

Employee salaries are reviewed annually. Salaries are adjusted based on industry standards, inflation and
individual performance. As an incentive, additional bonuses in cash may be paid at the discretion of management based on the performance of individuals. In addition, except under certain circumstances, R.O.C. law requires us to reserve from 10% to
15% of any offerings of our new common shares for employees subscription.

Our employees participate in our profit distribution
pursuant to our articles of incorporation. Employees are entitled to receive additional bonuses based on a certain percentage of our allocable surplus income. On March 16, 2016, our board of directors proposed an employee bonus in cash in the amount
of NT$1,131 million in relation to retained earnings in 2015.

Our employees are not covered by any collective bargaining agreements. We
believe we have a good relationship with our employees.



|E. | Share Ownership
|-- | ---------------

As of March 31, 2016, each of our directors and executive officers held
common shares and/or ADSs of United Microelectronics, either directly for their own account or indirectly as the representative of another legal entity on our board of directors, except for Chung-Laung Liu, Chun-Yen Chang, Cheng-Li Huang and Wenyi
Chu, our independent directors. As of April 9, 2016, our most recent record date, Hsun Chieh Investment Co. held approximately 441 million of our common shares, representing approximately 3.46% of our issued and outstanding share capital. Silicon
Integrated Systems Corp. held approximately 315 million of our common shares, representing approximately 2.47% of our issued and outstanding share capital. Chairman Mr. Hung held approximately 16 million of our common shares, representing
approximately 0.13% of our issued and outstanding share capital. Ting-Yu Lin held approximately 13 million of our common shares, representing approximately 0.1% of our issued and outstanding share capital.

We have adopted employee stock option plans in the past, pursuant to which options may be granted to our full-time regular employees,
including those of our domestic and overseas subsidiaries. The exercise price for the options would be the closing price of our common shares on the Taiwan Stock Exchange on the day the options are granted, while the expiration date for such options
is six years from the date of its issuance. The 300 million stock options with an exercise price of NT$10.4 that we granted in June 2009 expired on June 18, 2015. All stock options we previously granted had expired.



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According to our Employee Stock Options Plan, an option holder may exercise an increasing portion
of his or her options starting two years after the grant of the options. According to the vesting schedule, 50%, 75% and 100% of such option holders options shall vest two, three and four years after the grant of the options, respectively.
Upon a voluntary termination or termination in accordance with the R.O.C. Labor Law, the option holder shall exercise his or her vested options within 30 days, subject to exceptions provided therein, and after the termination otherwise such options
shall terminate. If termination was due to death, the heirs of such option holder have one year starting from the date of the death to exercise his or her vested options. If termination was due to retirement or occupational casualty, the option
holder or his or her heirs may exercise all his or her options within a certain period as provided. The options are generally not transferable or pledgeable by the option holders. The common shares issuable upon exercise of option held by our
directors and executive officers expired on June 18, 2015.



|ITEM 7. | MAJOR STOCKHOLDERS AND RELATED PARTY TRANSACTIONS
|------- | -------------------------------------------------



|A. | Major Stockholders
|-- | ------------------

The following table sets forth information known to us with respect
to the beneficial ownership of our common shares as of (i) April 9, 2016, our most recent record date and (ii) as of certain record dates in each of the preceding three years, for (1) the stockholders known by us to beneficially own more than 2% of
our common shares and (2) all directors and executive officers as a group. Beneficial ownership is determined in accordance with Securities and Exchange Commission rules.



|                                            |  |                                              |      |   |                                              |  |      |                                              |  |  |                                          |   |  |  |             | 
|------------------------------------------- |  | -------------------------------------------- | ---- | - | -------------------------------------------- |  | ---- | -------------------------------------------- |  |  | ---------------------------------------- | - |  |  | ----------- | 
|                                            |  | As of April 13,2014                          |      |   | As of April 11,2015                          |  |      | As of April 9, 2016                          | 
|                                            |  | Percentage ofcommon sharesbeneficially owned |      |   | Percentage ofcommon sharesbeneficially owned |  |      | Percentage ofcommon sharesbeneficially owned |  |  | Number ofcommon sharesbeneficially owned |  
|Name of Beneficial Owner                    |  |                                              |      |   |                                              |  |      |                                              |  |  |                                          |   |  |  |             | 
|Hsun Chieh Investment Co.,
Ltd. (1)         |  |                                              | 3.48 | % |                                              |  | 3.47 | %                                            |  |  | 3.46                                     | % |  |  | 441,371,000 | 
|Silicon Integrated Systems Corp.            |  |                                              | 2.48 | % |                                              |  | 2.48 | %                                            |  |  | 2.47                                     | % |  |  | 315,380,424 | 
|Directors and executive officers as a group |  |                                              | 6.39 | % |                                              |  | 6.28 | %                                            |  |  | 6.28                                     | % |  |  | 801,384,393 | 



|(1) | 36.49% owned by United Microelectronics Corporation as of March 31, 2016.
|--- | -------------------------------------------------------------------------

None of our major
stockholders have different voting rights from those of our other stockholders. To the best of our knowledge, we are not directly or indirectly controlled by another corporation, by any foreign government or by any other natural or legal person
severally or jointly.

For information regarding our common shares held or beneficially owned by persons in the United States, see
Item 9. The Offer and ListingA. Offer and Listing DetailsMarket Price Information for Our American Depositary Shares in this annual report.



|B. | Related Party Transactions
|-- | --------------------------

From time to time we have engaged in a variety of
transactions with our affiliates. The sales and purchase prices with related parties are determined through mutual agreement in reference to market conditions.

The following table shows our aggregate ownership interest, on a consolidated basis, in major related fabless design companies that we enter
into transactions from time to time as of December 31, 2015.



|                                 |  |             |       | 
|-------------------------------- |  | ----------- | ----- | 
|Name                             |  | Ownership % |      
|Silicon Integrated Systems Corp. |  |             | 19.70 | 
|Faraday Technology Corp.         |  |             | 13.94 | 

We provide foundry services to this fabless design company and the sales price was determined through mutual
agreement in reference to market conditions. We derived NT$156 million, NT$117 million and NT$1,140 million (US$35 million) of our net operating revenues in 2013, 2014 and 2015, respectively, from the provision of our foundry services. For more
information, please refer to Note 7 to our audited consolidated financial statements included in this annual report.



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|C. | Interests of Experts and Counsel
|-- | --------------------------------

Not applicable.



|ITEM 8. | FINANCIAL INFORMATION
|------- | ---------------------



|A. | Consolidated Statements and Other Financial Information
|-- | -------------------------------------------------------

Please refer to Item 18
for a list of all financial statements filed as part of this annual report on Form 20-F.

Except as described in Item 4. Information
on the CompanyB. Business OverviewLitigation, we are not currently involved in material litigation or other proceedings that may have, or have had in the recent past, significant effects on our financial position or profitability.

As for our policy on dividend distributions, see Item 10. Additional InformationB. Memorandum and Articles of Association Dividends and
Distributions. On June 11, 2013, our stockholders approved a cash dividend of NT$0.4 per common share for an aggregate of NT$5,061,310,216. On June 19, 2013, our board of directors resolved to adjust the cash dividend ratio to NT$0.40639654
per common share because the number of outstanding common shares had changed as a result of the exercise of employee stock options and our repurchase of treasury common shares. On June 11, 2014 our stockholders approved a cash distribution of NT$0.5
per common share for an aggregate of NT$6,253,157,145, among which NT$0.49 per common share was from additional paid-in capital while the remaining was from earnings. On June 9, 2015, our stockholders approved a cash distribution of NT$0.55 per
common share for an aggregate of NT$6,939,321,835. On June 24, 2015, our board of directors resolved to adjust the cash dividend ratio to NT$0.54969673 per common share because the number of outstanding common shares had changed as a result of the
exercise of employee stock options and our repurchase of treasury common shares. On March 16, 2016, our board of directors proposed dividends of NT$6,906,973,103 (approximately NT$0.55 per common share) which are expected to be approved at our
annual general stockholders meeting on June 7, 2016.

The following table sets forth the cash dividends per share and stock dividends per
share as a percentage of common shares outstanding paid during each of the years indicated in respect of common shares outstanding at the end of each such year, except as otherwise noted.



|     |  |                        |             |  |                         |  |            |                                                     |  |  |                                              |  |  |  |                | 
|---- |  | ---------------------- | ----------- |  | ----------------------- |  | ---------- | --------------------------------------------------- |  |  | -------------------------------------------- |  |  |  | -------------- | 
|     |  | Cash Dividendper Share |             |  | Stock Dividendper Share |  |            | Total Number ofCommon SharesIssued as StockDividend |  |  | Number ofOutstandingCommon Sharesat Year End | 
|     |  | NT$                    |             |  | NT$                     |  |            |                                                     |  |  |                                              | 
|1997 |  |                        |            |  |                         |  | 3.0        |                                                     |  |  | 868,629,276                                  |  |  |  | 4,117,758,265  | 
|1998 |  |                        |            |  |                         |  | 2.9        |                                                     |  |  | 1,199,052,940                                |  |  |  | 5,480,221,725  | 
|1999 |  |                        |            |  |                         |  | 1.5        |                                                     |  |  | 834,140,790                                  |  |  |  | 6,638,054,462  | 
|2000 |  |                        |            |  |                         |  | 2.0        |                                                     |  |  | 1,809,853,716                                |  |  |  | 11,439,016,900 | 
|2001 |  |                        |            |  |                         |  | 1.5        |                                                     |  |  | 1,715,104,035                                |  |  |  | 13,169,235,416 | 
|2002 |  |                        |            |  |                         |  | 1.5        |                                                     |  |  | 1,968,018,212                                |  |  |  | 15,238,578,646 | 
|2003 |  |                        |            |  |                         |  | 0.4        |                                                     |  |  | 607,925,145                                  |  |  |  | 15,941,901,463 | 
|2004 |  |                        |            |  |                         |  | 0.8        |                                                     |  |  | 1,288,558,185                                |  |  |  | 17,550,800,859 | 
|2005 |  |                        | 0.1029      |  |                         |  | 1.029      |                                                     |  |  | 1,758,736,435                                |  |  |  | 18,856,632,324 | 
|2006 |  |                        | 0.409141420 |  |                         |  | 0.10228530 |                                                     |  |  | 179,031,672                                  |  |  |  | 19,131,192,690 | 
|2007 |  |                        | 0.7         |  |                         |  |           |                                                     |  |  |                                             |  |  |  | 13,214,494,883 | 
|2008 |  |                        | 0.75        |  |                         |  | 0.45       |                                                     |  |  | 562,958,816                                  |  |  |  | 12,987,771,315 | 
|2009 |  |                        |            |  |                         |  |           |                                                     |  |  |                                             |  |  |  | 12,987,771,315 | 
|2010 |  |                        | 0.5         |  |                         |  |           |                                                     |  |  |                                             |  |  |  | 12,987,912,315 | 
|2011 |  |                        | 1.11164840  |  |                         |  |           |                                                     |  |  |                                             |  |  |  | 13,084,341,565 | 
|2012 |  |                        | 0.49980232  |  |                         |  |           |                                                     |  |  |                                             |  |  |  | 12,951,805,540 | 
|2013 |  |                        | 0.40639654  |  |                         |  |           |                                                     |  |  |                                             |  |  |  | 12,692,081,665 | 
|2014 |  |                        | 0.5         |  |                         |  |           |                                                     |  |  |                                             |  |  |  | 12,725,207,790 | 
|2015 |  |                        | 0.54969673  |  |                         |  |           |                                                     |  |  |                                             |  |  |  | 12,758,132,915 | 



|(1) | We declare stock dividends in a NT dollar amount per share, but we pay the stock dividends to our stockholders in the form of common shares. The amount of common shares distributed to each stockholder is calculated by
multiplying the dividend declared by the number of common shares held by the given stockholder, divided by the par value of NT$10 per share. Fractional common shares are not issued but are paid in cash.
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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|B. | Significant Changes
|-- | -------------------

For the significant subsequent events following the close of the
last financial year up to the date of this annual report on Form 20-F, please refer to Note 10 to our audited consolidated financial statements included elsewhere in this annual report.



|ITEM 9. | THE OFFER AND LISTING
|------- | ---------------------



|A. | Offer and Listing Details
|-- | -------------------------

Market Price Information for Our Common Shares

Our common shares have been listed on the Taiwan Stock Exchange since July 1985. There is no public market outside Taiwan for our common
shares. The table below shows, for the periods indicated, the high and low closing prices and the average daily volume of trading activity on the Taiwan Stock Exchange for our common shares. The closing price for our common shares on the Taiwan
Stock Exchange on April 15, 2016 was NT$12.85 per share.



|                                  |  |      |       |  |     |  |       |                             |  |  |           | 
|--------------------------------- |  | ---- | ----- |  | --- |  | ----- | --------------------------- |  |  | --------- | 
|                                  |  | High |       |  | Low |  |       | Average DailyTrading Volume | 
|                                  |  | NT$  |       |  | NT$ |  |       | (in thousands of shares)    | 
|2011                              |  |      | 18.10 |  |     |  | 10.45 |                             |  |  | 44,048.44 | 
|2012                              |  |      | 15.65 |  |     |  | 10.10 |                             |  |  | 39,247.79 | 
|2013                              |  |      | 12.40 |  |     |  | 10.90 |                             |  |  | 41,684.47 | 
|First Quarter                     |  |      | 12.40 |  |     |  | 10.90 |                             |  |  | 3,528.18  | 
|Second Quarter                    |  |      | 14.50 |  |     |  | 11.00 |                             |  |  | 82,540.32 | 
|Third Quarter                     |  |      | 15.05 |  |     |  | 11.75 |                             |  |  | 74,070.55 | 
|Fourth Quarter                    |  |      | 13.10 |  |     |  | 11.90 |                             |  |  | 37,050.69 | 
|2014                              |  |      | 16.50 |  |     |  | 12.00 |                             |  |  | 55,017.35 | 
|First Quarter                     |  |      | 13.05 |  |     |  | 12.00 |                             |  |  | 50,562.17 | 
|Second Quarter                    |  |      | 15.10 |  |     |  | 12.80 |                             |  |  | 53,799.21 | 
|Third Quarter                     |  |      | 16.50 |  |     |  | 12.60 |                             |  |  | 62,688.43 | 
|Fourth Quarter                    |  |      | 14.85 |  |     |  | 12.05 |                             |  |  | 52,503.20 | 
|2015                              |  |      | 16.10 |  |     |  | 9.92  |                             |  |  | 49,606.68 | 
|First Quarter                     |  |      | 16.05 |  |     |  | 14.70 |                             |  |  | 66,976.26 | 
|Second Quarter                    |  |      | 15.80 |  |     |  | 12.85 |                             |  |  | 50,339.63 | 
|Third Quarter                     |  |      | 13.30 |  |     |  | 10.05 |                             |  |  | 48,135.67 | 
|Fourth Quarter                    |  |      | 12.60 |  |     |  | 10.90 |                             |  |  | 35,647.23 | 
|October                           |  |      | 12.50 |  |     |  | 10.90 |                             |  |  | 41,518.51 | 
|November                          |  |      | 12.60 |  |     |  | 11.55 |                             |  |  | 37,061.61 | 
|December                          |  |      | 12.45 |  |     |  | 11.55 |                             |  |  | 28,995.11 | 
|2016 (through April 15)           |  |      | 13.45 |  |     |  | 11.05 |                             |  |  | 35,941.09 | 
|First Quarter                     |  |      | 13.45 |  |     |  | 11.05 |                             |  |  | 35,802.67 | 
|January                           |  |      | 12.85 |  |     |  | 11.05 |                             |  |  | 41,611.07 | 
|February                          |  |      | 13.40 |  |     |  | 12.90 |                             |  |  | 40,126.90 | 
|March                             |  |      | 13.45 |  |     |  | 12.90 |                             |  |  | 28,055.21 | 
|Second Quarter (through April 15) |  |      | 13.15 |  |     |  | 12.60 |                             |  |  | 36,817.77 | 
|April (through April 15)          |  |      | 13.15 |  |     |  | 12.60 |                             |  |  | 36,817.77 | 



Source:
Taiwan Stock Exchange.



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Market Price Information for Our American Depositary Shares

Our ADSs have been listed on the NYSE under the symbol UMC since September 19, 2000. The outstanding ADSs are identified by the
CUSIP number 910873 40 5. The table below shows, for the periods indicated, the high and low closing prices and the average daily volume of trading activity on the NYSE for our ADSs. The closing price for our ADSs on the New York Stock Exchange on
April 15, 2016 was US$2.00 per ADS. Each of our ADSs represents the right to receive five common shares.



|                                  |  |      |      |  |     |  |      |                             |  |  |           | 
|--------------------------------- |  | ---- | ---- |  | --- |  | ---- | --------------------------- |  |  | --------- | 
|                                  |  | High |      |  | Low |  |      | Average DailyTrading Volume | 
|                                  |  | US$  |      |  | US$ |  |      | (in ADSs)                   | 
|2011                              |  |      | 3.46 |  |     |  | 1.79 |                             |  |  | 3,454,527 | 
|2012                              |  |      | 2.72 |  |     |  | 1.75 |                             |  |  | 2,733,811 | 
|2013                              |  |      | 2.43 |  |     |  | 1.77 |                             |  |  | 1,862,883 | 
|2014                              |  |      | 2.58 |  |     |  | 1.95 |                             |  |  | 1,043,726 | 
|First Quarter                     |  |      | 2.15 |  |     |  | 1.97 |                             |  |  | 995,294   | 
|Second Quarter                    |  |      | 2.45 |  |     |  | 2.05 |                             |  |  | 1,476,770 | 
|Third Quarter                     |  |      | 2.58 |  |     |  | 1.99 |                             |  |  | 1,088,724 | 
|Fourth Quarter                    |  |      | 2.32 |  |     |  | 1.95 |                             |  |  | 618,612   | 
|2015                              |  |      | 2.54 |  |     |  | 1.61 |                             |  |  | 1,054,206 | 
|First Quarter                     |  |      | 2.54 |  |     |  | 2.22 |                             |  |  | 885,775   | 
|Second Quarter                    |  |      | 2.51 |  |     |  | 2.01 |                             |  |  | 1,058,081 | 
|Third Quarter                     |  |      | 2.09 |  |     |  | 1.61 |                             |  |  | 1,128,180 | 
|Fourth Quarter                    |  |      | 1.99 |  |     |  | 1.66 |                             |  |  | 1,136,951 | 
|October                           |  |      | 1.96 |  |     |  | 1.66 |                             |  |  | 1,145,657 | 
|November                          |  |      | 1.99 |  |     |  | 1.84 |                             |  |  | 1,467,794 | 
|December                          |  |      | 1.95 |  |     |  | 1.76 |                             |  |  | 827,478   | 
|2016 (through April 15)           |  |      | 2.14 |  |     |  | 1.66 |                             |  |  | 1,002,064 | 
|First Quarter                     |  |      | 2.14 |  |     |  | 1.66 |                             |  |  | 1,011,631 | 
|January                           |  |      | 1.96 |  |     |  | 1.66 |                             |  |  | 1,572,344 | 
|February                          |  |      | 2.06 |  |     |  | 1.93 |                             |  |  | 688,254   | 
|March                             |  |      | 2.14 |  |     |  | 2.05 |                             |  |  | 821,358   | 
|Second Quarter (through April 15) |  |      | 2.13 |  |     |  | 1.98 |                             |  |  | 949,011   | 
|April (through April 15)          |  |      | 2.13 |  |     |  | 1.98 |                             |  |  | 949,011   | 



Sources:
Thomson One

As of March 31, 2016, there were a total of 138,308,509 ADSs listed on the NYSE. With certain limited exceptions, holders of
common shares that are not R.O.C. persons are required to hold these common shares through a brokerage or custodial account in the R.O.C. As of March 31, 2016, 691,542,545 common shares were registered in the name of a nominee of JPMorgan Chase
& Co., the depositary under the deposit agreement. JPMorgan Chase & Co. has advised us that, as of March 31, 2016, 138,276,581 ADSs representing these 691,382,905 common shares were held of record by Cede & Co., and 31,928 ADSs were held
by U.S. registered stockholders. We have no further information as to common shares held or beneficially owned by U.S. persons.



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|B. | Plan of Distribution
|-- | --------------------

Not applicable.



|C. | Markets
|-- | -------

The principal trading markets for our common shares are the Taiwan Stock
Exchange and the New York Stock Exchange, on which our common shares trade in the form of ADSs.



|D. | Selling Stockholders
|-- | --------------------

Not applicable.



|E. | Dilution
|-- | --------

Not applicable.



|F. | Expenses of the Issue
|-- | ---------------------

Not applicable.



|ITEM 10. | ADDITIONAL INFORMATION
|-------- | ----------------------



|A. | Share Capital
|-- | -------------

Not applicable.



|B. | Memorandum and Articles of Association
|-- | --------------------------------------

The following statements summarize the material
elements of our capital structure and the more important rights and privileges of stockholders conferred by the R.O.C. law and our articles of incorporation.

Objects and Purpose

The scope of
business of United Microelectronics as set forth in Article 2 of our articles of incorporation, includes (i) integrated circuits; (ii) semiconductor parts and components; (iii) parts and components of microcomputers, microprocessors, peripheral
support and system products; (iv) parts and components of semiconductor memory systems products; (v) semiconductor parts and components for digital transceiver product and system products; (vi) semiconductor parts and components for telecom system
and system products; (vii) testing and packaging of integrated circuits; (viii) mask production; (ix) research and development, design, production, sales, promotion and after-sale services related to our business; and (x) export/import trade related
to our business.

Directors

The
R.O.C. Company Act and our articles of incorporation provide that our board of directors is elected by stockholders and is responsible for the management of our business. As of March 31, 2016, our board of directors consisted of nine directors, out
of which four are independent directors. In the annual ordinary stockholders meeting held on June 11, 2007, we amended our articles of incorporation to abolish the managing director mechanism. In the annual ordinary stockholders meeting
held on June 13, 2008, we amended our articles of incorporation to introduce the mechanism of an Audit Committee. The Chairman presides at all meetings of our board of directors, and also has the authority to represent our company. The term of
office for our directors is three years, and our directors are elected by our stockholders by means of cumulative voting. The amendment to our articles of incorporation on June 11, 2007 also adopts a nomination system which provides that holders of
one percent or more of the issued and outstanding shares of our company would be entitled to submit a roster of candidates to be considered for nomination to our companys board of directors at a stockholders meeting involving the
election of directors. Pursuant to the R.O.C. Company Act, entity that owns our common shares may be elected as a director, in which case a natural person must be designated to act as the legal entitys representative. A legal entity that is
our stockholder may designate its representative to be elected as our director on its behalf. In the event several representatives are designated by the same legal entity, any or all of them may be elected. A director who serves as the
representative of a legal entity may be removed or replaced at any time at the discretion of such legal entity, and the replacement director may serve the remainder of the term of office of the replaced director. As of March 31, 2016, three of our
nine directors are representatives of other legal entities, as shown in Item 6. Directors, Senior Management and EmployeesA. Directors and Senior Management.



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According to the R.O.C. Company Act and the rules promulgated under the R.O.C. Securities and
Exchange Act, a director who has a personal interest in a matter to be discussed at the meeting of the board of directors, shall explain the essential contents of such personal interest in the meeting of the board of directors. In case that such
personal interest may impair the interests of us, such director shall abstain from joining the discussion and voting on such matter. In case that such director is the representative designated by a legal entity stockholder to be elected as our
director and such legal entity stockholder has personal interest in the matter to be discussed at the meeting of the board of directors, the rules provided in the preceding two sentences shall also apply. Our articles of incorporation, as amended on
June 13, 2008, provide that our board of directors is authorized, by taking into account of the extent of his/her/its involvement of our operation activities and the value of his/her/its contribution, to determine the compensation for each director
at a comparable rate adopted by other companies of the same industry regardless of the profit received by our company. In addition, according to our articles of incorporation, we may distribute 0.1% of the balance of our earnings after deduction of
payment of all taxes and dues, deduction of any past losses, allocation of 10% of our net income as a legal reserve, and allocation of special reserve according to applicable laws and regulations or the order of the competent authority, if any, as
remuneration to directors. However, the R.O.C. Company Act has been amended in May 2015, which changed the distribution mechanism of director remuneration. Please refer to Dividends and Distributions in this item below for more
details. Our articles of incorporation do not impose a mandatory retirement age limit for our directors. Furthermore, our articles of incorporation do not impose a shareholding qualification for each director, while the laws and regulations require
the aggregate shareholding of all directors, excluding independent directors, to meet certain thresholds considering the paid-in capital and the numbers of the independent directors. According to our current internal Loan Procedures, we shall not
extend any loan to our directors.

In order to strengthen corporate governance of companies in Taiwan, effective from January 1, 2007, the
amended R.O.C. Securities and Exchange Act authorizes the R.O.C. FSC, after considering certain factors, including the scale, shareholding structure and business nature of a public company, to require that a public company, such as our company, meet
certain criteria, including having at least two independent directors but not less than one fifth of the total number of directors.

In
addition, pursuant to the amended R.O.C. Securities and Exchange Act, a public company is required to either establish an audit committee, or R.O.C. Audit Committee, or retain supervisors, provided that the R.O.C. FSC may, after considering the
scale and business nature of a public company and other necessary situation, require the company to establish an audit committee in place of its supervisors. We have amended our articles of incorporation in the annual ordinary stockholders
meeting held on June 13, 2008, introducing the mechanism of an R.O.C. Audit Committee. On February 20, 2013, the R.O.C. FSC has ruled that a public company with certain scale or of certain business nature, including us, shall establish an R.O.C.
Audit Committee instead of the supervisors. According to our latest amended articles of incorporation and audit committee charter, our R.O.C. Audit Committee is composed of all independent directors and performs the power and duties provided by
applicable laws and regulations, including without limitation the powers and the duties of supervisors provided under the R.O.C. Company Act. A company is not allowed to maintain both supervisors and a R.O.C. Audit Committee, so we chose to
eliminate our supervisors when we established our R.O.C. Audit Committee in 2009.



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According to our current articles of incorporation, we may purchase directors and officers
liability insurance for our directors, covering the liabilities incurred in relation to his/her/its operation of business and legally responsible for.

Common Shares

As of December 31, 2015,
our authorized share capital was NT$260 billion, divided into 26 billion common shares, of which 12,758,132,915 common shares were issued and outstanding. All common shares presently issued are fully paid and in registered form, and existing
stockholders are not subject to any capital calls. We do not have any outstanding warrants or option to purchase our common shares.

Employee Stock
Option

According to our Employee Stock Options Plan, options may be granted to our full-time regular employees, including those of our
domestic and overseas subsidiaries. Since 2004 to 2009, we obtained approvals by relevant R.O.C. authorities to grant up to an aggregate of 1,500 million stock options to acquire our common shares under our Employee Stock Option Plan. According to
the plan, an option holder may exercise an increasing portion of his or her options in time starting two years after the grant of the options. According to the vesting schedule, 50%, 75% and 100% of such option holders options shall vest two,
three and four years after the grant of the options, respectively. All employee stock options expired on June 18, 2015.

New Common Shares and
Preemptive Rights

New common shares may only be issued with the prior approval of our board of directors. If our issuance of any new
common shares will result in any change in our authorized share capital, we are required under R.O.C. law to amend our articles of incorporation and obtain approval of our stockholders in a stockholders meeting. We must also obtain the
approval of, or submit a registration with, the R.O.C. FSC and the Science Park Administration. According to the R.O.C. Company Act, when a company issues capital stock for cash, 10% to 15% of the issue must be offered to its employees. In addition,
if a listed company intends to offer new common shares for cash, at least 10% of the issue must also be offered to the public. This percentage can be increased by a resolution passed at a stockholders meeting, which will reduce the number of
new common shares in which existing stockholders may have preemptive rights. Unless the percentage of the common shares offered to the public is increased by a resolution, existing stockholders of the company have a preemptive right to acquire the
remaining 75% to 80% of the issue in proportion to their existing shareholdings. According to the Corporate Merger and Acquisition Act of the R.O.C., as effective on February 8, 2002 and amended on May 5, 2004 and July 8, 2015 which took effect on
January 8, 2016, if new common shares issued by our company are solely for the purpose of merger, acquisition, share swap or spin-off, the above-mentioned restrictions, including the employee stock ownership plan, the preemptive rights of the
existing stockholders and the publicity requirement of a listed company, to such issuance of new common shares may not be applied.

Stockholders

We only recognize persons registered in our register as our stockholders. We may set a record date and close our register of
stockholders for specified periods to determine which stockholders are entitled to various rights pertaining to our common shares.

Transfer of Common
Shares

Under the R.O.C. Company Act, a public company, such as our company, may issue individual share certificates, one master
certificate or no certificate at all, to evidence common shares. Our articles of incorporation, as amended on June 13, 2008, provide that we may deliver common shares in book-entry form instead of by means of issuing physical share certificates. We
have issued our common shares in uncertificated/scripless form since 2007. Therefore, the transfer of our common shares is carried out on the book-entry system. The settlement of trading of our common shares is normally carried out on the book-entry
system maintained by the Taiwan Depositary and Clearing Corporation. Transferees must have their names and addresses registered on our register in order to assert stockholders rights against us. Our stockholders are required to file their
respective specimen seals with our share registrar, Horizon Securities Co., Ltd.



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Stockholders Meetings

We are required to hold an annual ordinary stockholders meeting once every calendar year within six months from the end of each fiscal
year. Our board of directors may convene an extraordinary meeting whenever the directors deem necessary, and they must do so if requested in writing by stockholders holding no less than 3% of our issued common shares who have held these common
shares for more than a year. At least 15 days advance written notice must be given of every extraordinary stockholders meeting and at least 30 days advance written notice must be given of every annual ordinary stockholders
meeting. Unless otherwise required by law or by our articles of incorporation, voting for an ordinary resolution requires an affirmative vote of a simple majority of those present. A distribution of cash dividends would be an example of an ordinary
resolution. The R.O.C. Company Act and, in the case of certain merger and acquisition deals, the Corporate Merger and Acquisition Act, also provides that in order to approve certain major corporate actions, including any amendment of our articles of
incorporation, dissolution, merger or spin-off, share swap, entering into, amendment, or termination of any contract for lease of the companys business in whole, or for entrusted business, or for joint operation with others, on regular basis,
the transfer of all or an essential part of the business or assets, accept all of the business or assets of any other company which would have a significant impact on our operations, removing directors or the distribution of dividend in stock form,
a special resolution shall be adopted by the holders of the majority of our common shares represented at a stockholders meeting at which holders of at least two-thirds of our issued and outstanding common shares are present; provided that, in
the case of a public company, such as our company, such resolution may be adopted by the holders of at least two-thirds of the common shares represented at a stockholders meeting at which holders of at least a majority of our issued and
outstanding common shares are present; provided, further, that in the case of merger, spin-off, transfer of all or essential part of business or asset, or share swap which meets the specific criteria provided under the Corporate Merger and
Acquisition Act, such as short-form merger/spin-off/share swap or whale-minnow merger/spin-off/share-swap (as defined therein), such corporate action can be approved by a board resolution adopted by majority consent at a meeting with at least
two-thirds of our directors present without stockholders approval. Notwithstanding the foregoing, in the event such transaction will result in our delisting, the approval from holders of at least two-thirds of our issued and outstanding common
shares is required.

Voting Rights

Each common share is generally entitled to one vote and no voting discount will be applied. However, treasury common shares and our common
shares held by (i) an entity in which we own more than 50% of the voting shares or paid-in capital, or (ii) a third party in which we and an entity controlled by us jointly own, directly or indirectly, more than 50% of the voting shares or paid-in
capital are not entitled to any vote. Except as otherwise provided by law or our articles of incorporation, a resolution can be adopted by the holders of a simple majority of the issued and outstanding common shares represented at a
stockholders meeting. The quorum for a stockholders meeting to discuss the ordinary resolutions is a majority of the issued and outstanding common shares. Pursuant to the R.O.C Company Act amended on December 28, 2011, the election of
directors by our stockholders shall be conducted by means of cumulative voting rather than other voting mechanisms adopted in our articles of incorporation. Except as otherwise provided under applicable laws and regulations, in all other matters, a
stockholder must cast all his or her votes in the same manner when voting on any of these matters.

Our stockholders may be represented at
an ordinary or extraordinary stockholders meeting by proxy if a valid proxy form is delivered to us five days before the commencement of the ordinary or extraordinary stockholders meeting, unless such proxy has been revoked no later than
two days before the date of the stockholders meeting. Voting rights attached to our common shares exercised by our stockholders proxy are subject to the proxy regulation promulgated by the R.O.C. FSC.

Authorized by latest amendment of the R.O.C Company Act, the R.O.C. FSC has issued an administrative order on February 20, 2012 to require
Taiwan Stock Exchange-listed companies, such as our company, and Taipei Exchange (previously known as GreTai Securities Market)-listed companies in the R.O.C. with NT$10 billion or more of paid-in share capital and with 10,000 or more
stockholders as of the first date of the close period applicable to the stockholders meeting to adopt an e-voting system for stockholders meeting. The e-voting system provides a new platform for stockholders to exercise their voting
rights online. As a company that meets the foregoing criteria, we have successfully adopted the e-voting system in the 2012 stockholders meeting and voted by poll on each agenda for discussion.



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Any stockholder who has a personal interest in a matter to be discussed at our stockholders
meeting, the outcome of which may impair our interests, shall not vote or exercise voting rights on behalf of another stockholder on such matter.

According to the R.O.C. Company Act newly amended on January 4, 2012, a stockholder of a public company who holds common shares for others,
such as a depositary, may choose to exercise his/her/its voting power separately. On April 13, 2012, R.O.C. FSC promulgated the Regulations Governing the Split Voting of the Stockholders and Compliance Matters for Public Companies, the
implementation rules of such split voting method, which stipulates that the depository of the overseas depositary receipts may exercise its voting power separately in accordance with the instructions of the respective holders of the ADS.
Notwithstanding the foregoing, before any amendment to the currently effective Deposit Agreement is made, holders of our ADSs generally will not be able to exercise voting rights on the common shares underlying their ADSs on an individual basis.

Dividends and Distributions

We are
not allowed under R.O.C. law to pay dividends on our treasury common shares. We may distribute dividends on our issued and outstanding common shares if we have earnings. Before distributing a dividend to stockholders, among other things, we must
recover any past losses, pay all outstanding taxes and set aside a legal reserve equivalent to 10% of our net income until our legal reserve equals our paid-in capital, and a special reserve, if any.

At an annual ordinary stockholders meeting, our board of directors submits to the stockholders for their approval proposals for the
distribution of dividends or the making of any other distribution to stockholders from our net income or reserves for the preceding fiscal year. Dividends are paid to stockholders proportionately. Dividends may be distributed either in cash or in
common shares or a combination of cash and common shares, as determined by the stockholders at such meeting.

Our articles of
incorporation currently in effect provide that we may distribute as remuneration to directors 0.1% of the balance of our earnings deducted by:



| |  |  | payment of all taxes and dues;
| | - |  | ------------------------------



| |  |  | deduction of any past losses;
| | - |  | -----------------------------



| |  |  | allocation of 10% of our net income as a legal reserve; and
| | - |  | -----------------------------------------------------------



| |  |  | special reserve, if any.
| | - |  | ------------------------

The amount of no less than 5% of the residual amount after the
deductions illustrated above, plus, at discretion, any undistributed earnings from previous years, shall be distributed as bonus to employees. Originally, the distribution of employee bonus were in the form of new common shares; in the annual
ordinary stockholders meeting held in June 2005, our stockholders approved an amendment of our articles of incorporation to enable the distribution of employee bonus in the form of cash or in common shares. Employees eligible for such
distribution may include certain qualified employees from our subordinate companies and the qualification of such employees is to be determined by our board of directors.

However, according to Articles 235 and 235-1 of the Company Act, both amended and added on May 20, 2015, employee bonus and directors
remuneration shall no longer be a profit sharing item but shall be calculated based on earnings before tax and distributed as an expenses. The board has resolved to propose to amend our articles of incorporation in the 2016 annual
general meeting. Under the proposed amendments, where we make profits before tax for the annual financial year, we shall appropriate (i) no less than 5% of such annual profits before tax as employee bonus, and (ii) a maximum of 0.1% as
directors remunerations. The employees eligible for the distribution remain including our employees and employees of our subsidiaries and the form of employee bonus may still be made in stock or cash. Notwithstanding the foregoing, if we have
accumulated losses of the previous years, we shall set aside the amount of such accumulated losses prior to the allocation of the employee bonus and the above directors remuneration. For the purpose of calculation of the above employee bonus
and the directors remunerations, such annual profits before tax shall be without giving effect of the deduction and distribution of such employee bonus and the directors remunerations.



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The remaining amount may be distributed according to the distribution plan proposed by our board
of directors based on our dividend policy, and submitted to the stockholders meeting for approval. The above proposed amendments also specify that the amount distributable as dividend shall be the sum of (x) the balance of our earnings
deducted by (i) payment of all taxes and dues, (ii) deduction of any past losses, (iii) allocation of 10% of our net income as a statutory reserve (which may be exempted if the accumulated amount of legal reserve has amounted to our paid-in
capital); and (iv) special reserve, if any, plus (y) the retained earnings of previous years. In the annual ordinary stockholders meeting held in June 2005, our stockholders approved a change of the percentage of stock dividend issued to our
stockholders, if any, to no more than 80% and cash dividend, if any, to no less than 20%.

In addition to permitting dividends to be paid
out of net income, we are permitted under the R.O.C. Company Act to make distributions to our stockholders of additional common shares by capitalizing reserves, including the legal reserve and capital surplus of premiums from issuing stock and
earnings from gifts received, or make such distributions by cash, if we do not have losses. However, where legal reserve is distributed by capitalization or in cash, only the portion of legal reserve which exceeds 25 percent of the paid-in capital
may be distributed.

For information as to R.O.C. taxes on dividends and distributions, see E. R.O.C. Tax Considerations
in this Item.

Acquisition of Our Common Shares by Us

An R.O.C. company may not acquire its own common shares, except under certain exceptions provided in the R.O.C. Company Act or the R.O.C.
Securities and Exchange Act. Under the amendments to the R.O.C. Company Act, which took effect on November 14, 2001, a company may purchase up to 5% of its issued common shares for transfer to employees as employee compensation in accordance
with a resolution of its board of directors, passed by a majority vote, at a meeting with at least two-thirds of the directors present.

Under Article 28-2, an amendment to the R.O.C. Securities and Exchange Act, which took effect on July 21, 2000, we may, by a board resolution
adopted by majority consent at a meeting with two-thirds or more of our directors present, purchase up to 10% of our issued common shares on the Taiwan Stock Exchange or by a tender offer, in accordance with the procedures prescribed by the R.O.C.
FSC, for any of the following purposes:



| |  |  | to transfer our common shares to our employees as employee compensation;
| | - |  | ------------------------------------------------------------------------



| |  |  | to transfer upon conversion of bonds with warrants, preferred shares with warrants, convertible bonds, convertible preferred shares or certificates of warrants issued by us; or
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | if necessary, to maintain our credit and our stockholders equity; provided that the common shares so purchased shall be canceled thereafter.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------

We have from time to time announced plans, none of which was binding on us, to buy back up to a fixed amount of our common shares on the
Taiwan Stock Exchange at the price range set forth in the plans disclosed in Item 16E. Purchase Of Equity Securities By The Issuer And Affiliated Purchasers. We may not spend more than the aggregate amount of the retained earnings,
the premium from issuing stock and the realized portion of the capital reserve to purchase our common shares. Historically, we have cancelled some of the repurchased common shares and transferred some of the repurchased common shares to our
employees as employee compensation. In 2010, 2013 and 2015, we purchased an aggregate of 300 million, 200 million and 200 million, respectively, of our common shares under these plans. From February 3, 2010 to April 2, 2010, we purchased 300 million
of our common shares on the Taiwan Stock Exchange at an average price of NT$16.15 per share to transfer to our employees as employee compensation. From March 14, 2013 to May 13, 2013, we purchased 200 million of our common shares on the Taiwan Stock
Exchange at an average price of NT$11.23 per share to transfer to our employees as employee compensation. From July 30, 2015 to September 29, 2015, we purchased 200 million of our common shares on the Taiwan Stock Exchange at an average price
of NT$11.02 per share to transfer to our employees as employee compensation.



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On March 14, 2012, our board of directors approved the cancellation of 157,934,400 treasury
common shares, which were purchased from December 17, 2008 to February 16, 2009. On April 24, 2013, our board of directors approved the cancellation of 300,000,000 treasury common shares, which were purchased from February 3, 2010 to April 2, 2010.

We may not pledge or hypothecate any purchased common shares. In addition, we may not exercise any stockholders rights attached to
such common shares. In the event that we purchase our common shares on the Taiwan Stock Exchange, our affiliates, directors, managers and their respective spouses and minor children and/or nominees are prohibited from selling any of our common
shares during the period in which we purchase our common shares.

In addition to the share purchase restriction, the Company Act provides
that our subsidiaries may not acquire our common shares or the equity securities of our majority-owned subsidiaries if the majority of the outstanding voting equity securities or paid-in capital of such subsidiary is directly or indirectly held by
us.

Liquidation Rights

In a
liquidation, you will be entitled to participate in any surplus assets after payment of all debts, liquidation expenses and taxes proportionately.

Rights to Bring Stockholders Suits

Under the R.O.C. Company Act, a stockholder may bring suit against us in the following events:



| |  |  | within 30 days from the date on which a stockholders resolution is adopted, a stockholder may file a lawsuit to annul a stockholders resolution if the procedure for convening a stockholders meeting or
the method of resolution violates any law or regulation or our articles of incorporation. However, if the court is of the opinion that such violation is not material and does not affect the result of the resolution, the court may reject the
stockholders claim.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | if the substance of a resolution adopted at a stockholders meeting contradicts any applicable law or regulation or our articles of incorporation, a stockholder may bring a suit to determine the validity of such
resolution.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Stockholders may bring suit against our directors under the following circumstances:



| |  |  | Stockholders who have continuously held 3% or more of our issued common shares for a period of one year or longer may request in writing that the audit committee institutes an action against a director on our behalf. In
case the audit committee fails to institute an action within 30 days after receiving such request, the stockholders may institute an action on our behalf. In the event stockholders institute an action, a court may, upon the defendants motion,
order such stockholders to furnish appropriate security.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Stockholders who hold more than 3% or more of our total issued common shares may institute an action with a court to remove a director of ours who has materially violated the applicable laws or our articles of
incorporation or has materially damaged the interests of our company if a resolution for removal on such grounds has first been voted on and rejected by our stockholders and such suit is filed within 30 days of such stockholders vote.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | In the event that any director, manager or stockholder holding more than 10% of our common shares or any respective spouses or minor children and/or nominees of any of them sells common shares within six months after
acquisition of such common shares, or repurchases the common shares within six months after the sale, we may claim for recovery of any profits realized from the sale and purchase. If our board of directors or audit committee fail to claim for
recovery, any stockholder may set forth a 30-day period for our board of directors or audit committee to exercise the right. In the event our directors or audit committee fail to exercise the right during such 30-day period, such requesting
stockholder shall have the right to claim such recovery on our behalf. Our directors shall be jointly and severally liable for damages suffered by us as a result of their failure to exercise the right of claim.
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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Other Rights of Stockholders

Under the R.O.C. Company Act and the Corporate Merger and Acquisition Act, dissenting stockholders are entitled to appraisal rights in the
event of a spin-off or a merger and various other major corporate actions. Dissenting stockholders may request us to redeem all their common shares at a then fair market price to be determined by mutual agreement. If no agreement can be reached, the
valuation will be determined by a court. Subject to applicable law, dissenting stockholders may, among other things, exercise their appraisal rights by notifying us in writing before the related stockholders meeting and/or by raising and
registering their dissent at the stockholders meeting and also waive their voting rights.

One or more stockholders who have held 3%
or more of the issued and outstanding common shares one year or longer may require our board of directors to call an extraordinary stockholders meeting by sending a written request to our board of directors.

Effective from June 24, 2005, the R.O.C. Company Law allows stockholder(s) holding 1% or more of the total issued common shares of a company
to, during the period of ten days or more prescribed by the company, submit one proposal in writing containing no more than three hundred words (in terms of Chinese characters) for discussion at the annual ordinary stockholders meeting.

Financial Statements

For a period of at
least 10 days before our annual ordinary stockholders meeting, we must make available our annual financial statements at our principal offices in Hsinchu, Taiwan, and our share registrar in Taipei for our stockholders inspection.

Transfer Restrictions

Our directors,
managers and stockholders holding more than 10% of our common shares are required to report any changes in their shareholding to us on a monthly basis. In addition, the number of common shares that they can sell or transfer on the Taiwan Stock
Exchange on a daily basis is limited by R.O.C. law. Further, they may sell or transfer our common shares on the Taiwan Stock Exchange only after reporting to the R.O.C. FSC at least three days before the transfer, provided that such reporting is not
required if the number of common shares transferred does not exceed 10,000 in one business day.



|C. | Material Contracts
|-- | ------------------

Cross License Agreement, dated as of January 1, 2006, between United
Microelectronics Corporation and International Business Machines Corporation.

We entered into a five-year cross license agreement
with IBM effective as of January 1, 2006, which provides for the cross license of certain semiconductor patents including process, topography and design. Under this agreement, IBM had granted to us and our subsidiaries, nonexclusive and
non-transferable licenses, without the right to grant sublicenses, for making our and our subsidiaries licensed products in R.O.C., Japan and Singapore and selling, leasing, licensing, using and/or transferring our and our subsidiaries
licensed products worldwide under IBMs patents filed prior to January 1, 2011; we granted IBM, royalty-free, worldwide and non-transferable licenses, without the right to grant sublicenses, for the term of the cross license for making,
selling, leasing, licensing, using and/or transferring IBMs licensed products under our patents filed prior to January 1, 2011. We also agreed to pay IBM certain royalty fees under this agreement. This five-year cross license agreement with
IBM terminated on December 31, 2010. We entered into a new life-of-the-patents cross license agreement with IBM that will be effective until June 30, 2029, the expiration date of the last-to-expire of the licensed patents thereunder.
Under this agreement, IBM has granted to us and our subsidiaries, nonexclusive and non-transferable licenses, without the right to grant sublicenses, for making our and our subsidiaries licensed products in R.O.C., Japan, Singapore and PRC and
selling, leasing, licensing, using and/or transferring our and our subsidiaries licensed products worldwide under IBMs patents filed effectively prior to July 1, 2009; we granted IBM, royalty-free, worldwide and non-transferable
licenses, without the right to grant sublicenses, for the term of the cross license for making, selling, leasing, licensing, using and/or transferring IBMs licensed products under our patents filed effectively prior to July 1, 2009. We also
agreed to pay IBM certain royalty fees under this agreement. In addition, we have renewed the aforesaid patent cross license agreement with IBM on June 13, 2013, under which IBM grants us a license under all its patents with an effective filing date
prior to December 31, 2015.



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Technology Agreement, dated as of June 29, 2012, between United Microelectronics Corporation and International
Business Machines Corporation.

We entered into a technology license agreement with International Business Machines Corporation
(IBM) on June 29, 2012. Under this agreement, IBM granted us a perpetual license under its 20nm bulk industry standard CMOS technology and developmental processes associated with manufacturing integrated circuits using a three
dimensional FinFet device technology for using, offering for sale, selling, importing or otherwise transferring our licensed products.

Patent
Portfolio License Agreement, dated as of February 8, 2013, between United Microelectronics Corporation and Mosaid Technologies Incorporated.

We entered into a Patent Portfolio License Agreement with Mosaid Technologies Incorporated, or Mosaid, effective from February 8, 2013, which
provides for the license under its semiconductor manufacturing process patents during the period from February 8, 2013 to February 8, 2018. Under this agreement, Mosaid grants to us and our subsidiaries, a nonexclusive and non-transferable license
for making, selling, importing or otherwise disposing of our and our subsidiaries licensed products. The parties further agree not to assert patent claims against each other prior to February 8, 2018. We also agree to pay Mosaid certain
royalty fees under this agreement.

Other Patent License Agreements in 2015

We signed a Patent Cross License Agreement with Avago Technologies General IP Pte. Ltd., or Avago, effective from January 1, 2014 to December
31, 2018, which provides for the license of semiconductive device under certain licensed patents. Under this agreement, Avago grants to us and our subsidiaries a non-exclusive and non-transferable license for making, selling, importing or otherwise
disposing of our and our subsidiaries licensed products. In exchange, we agree to pay Avago certain royalty fees under this agreement.

In addition, we signed a Patent License Agreement with NXP B.V., effective from September 30, 2015 to September 29, 2020, under which, both
NXP B.V. and we agree to grant to the other party a license under its patents and patent applications. We also agree to pay NXP B.V. certain royalty under this agreement.

12-inch Fab Semiconductor Manufacture Technology License Agreement, dated as of December 1, 2015, between Us and USC

In order to facilitate USC to build up its semiconductor manufacture technology and capability, we licensed the 40/55 nm semiconductor
manufacture technology approved by the relevant R.O.C. authorities to USC. The license agreement is effective from December 1, 2015 to December 31, 2019 and USC will pay us certain royalty under this agreement.



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Major Long-term Supply and Marketing Agreements

We have entered into long-term distribution, sales, service and marketing agreements with the following companies: UMC Group (USA), an
agreement effective from January 1, 2013 through December 3, 2018; United Microelectronics (Europe) B.V., an agreement effective from January 1, 2013 through December 3, 2017; UMC Group Japan Co., Ltd., an agreement effective from February 8, 2013
through December 31, 2017; UMC Korea Co. Ltd., an agreement effective from January 1, 2015 through December 31, 2015; and Hejian, an agreement effective from January 1, 2015 through December 31, 2016.

Major Construction Agreements

We entered
into major construction agreements in connections with USC facility with major companies, such as L&K Engineering Company, China Construction Second Engineering Bureau Ltd., and FuJian Tung Kang Steel Co., Ltd., for the construction of the Fab
12X in Xiamen, Fujian Province, China. These agreements are effective from January 1, 2015 to December 31, 2016, and the total contractual amount exceeds NT$15.0 billion.

We also entered into various major facility construction agreements in connection with our Fab 12A fab facility, piping, and various material
supply systems, with major companies, such as Concord Technology., Ltd., Chien Yueh Technology Co., Ltd., Worldwide Technology Co., Ltd., and Hueng Luei Process Industry Co., Ltd., for the phase 5 facilities in our Fab12A in the Tainan Science Park.
These agreements are effective from January 2015 to December 2016, and the total contractual amount exceeds NT$1.1 billion.

Major Long-term Loan
Agreement

We entered into a long-term secured loan agreement effective from January 30, 2013 through January 30, 2020 with the Land
Bank of Taiwan for up to NT$6 billion. We pledged the equipment at our semiconductor facilities in Tainan Science Park as collateral. Before the expiration of the utilization period of the long-term secured loan on January 30, 2015, we did not apply
for any disbursements of the long-term secured loan. According to the relevant rules of the Land Bank of Taiwan, the said utilization period cannot be extended. We have no intention to renew or extend the long-term secured loan agreement. As no
disbursements of the long-term secured loan were made, we will not be required to perform under this long-term secured loan agreement.



|D. | Exchange Controls
|-- | -----------------

Foreign Investment and Exchange Controls in Taiwan

We have extracted from publicly available documents the information presented in this section. Please note that citizens of the
Peoples Republic of China and entities organized in the Peoples Republic of China are subject to special R.O.C. laws, rules and regulations, which are not discussed in this section.

General

Historically, foreign
investments in the securities market of Taiwan were restricted. However, commencing in 1983, the Taiwan government has from time to time enacted legislation and adopted regulations to make foreign investment in the Taiwan securities market possible.
Initially, only overseas investment trust funds of authorized securities investment trust enterprises established in Taiwan were permitted to invest in the Taiwan securities market. Since January 1, 1991, qualified foreign institutional investors
are allowed to make investments in the Taiwan public securities market. Since March 1, 1996, non-resident foreign institutional and individual investors, called general foreign investors, are permitted to make direct investments in the
Taiwan public securities market. On September 30, 2003, the Executive Yuan amended the Regulations Governing Investment in Securities by Overseas Chinese and Foreign Nationals, or the Investment Regulations, under which the Qualified Foreign
Institutional Investors, or QFII, designations have been abolished and the restrictions on foreign portfolio investors have been revised. According to the Investment Regulations, Foreign Institutional Investor, or FINI, means an
entity which is incorporated under the laws of countries other than the R.O.C. or the branch of a foreign entity that is established within the territory of the R.O.C., and Foreign Individual Investor, or FIDI, means an overseas Chinese
or a foreign natural person. In addition, the Investment Regulations also lifted some restrictions and simplified procedures of investment application.



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On April 30, 2009, the R.O.C. FSC promulgated regulations allowing QDIIs under PRC regulations
and certain other PRC persons to invest in the securities of R.O.C. companies. However, prior approval from the Investment Commission of the R.O.C. Ministry of Economic Affairs is required for QDIIs or certain other PRC persons to own 10% or more of
the issued and outstanding share capital of a listed R.O.C. company.

Foreign Ownership Limitations

Foreign ownership of the issued share capital in a Taiwan Stock Exchange-listed company or a Taipei Exchange-listed company has been limited to
50% in the past. Since December 30, 2000, the 50% limit has been lifted. Foreign investors can now hold such investments without any foreign ownership percentage limitations, unless the law has imposed restrictions otherwise.

Foreign Investors

Each FINI who wishes
to invest directly in the R.O.C. securities market is required to register with the Taiwan Stock Exchange and obtain an investment identification number if the FINI is a non-resident and has no sub-investment accounts in the R.O.C. Each FIDI who
wishes to invest directly in the R.O.C. securities market is also required to register with the Taiwan Stock Exchange and obtain an investment identification number. The R.O.C. FSC has lifted the limitation on the amount of investment in the R.O.C.
securities market for a non-resident FIDI Except for some restrictions imposed by specific laws and regulations, the individual and aggregate foreign ownership of the issued share capital in a Taiwan Stock Exchange-listed company or a Taipei
Exchange-listed company is not restricted. An R.O.C. custodian for a non-resident FINI or FIDI is required to submit to the CBC, and the Taiwan Stock Exchange a report of trading activities, inward and outward remittance of capital and status of
assets under custody and other matters every month. Foreign institutional investors are not subject to any ceiling for investment in the R.O.C. securities market.

Foreign Investment Approval

Foreign
investors (both institutional and individual) who wish to make direct investments in the common shares of R.O.C. companies are required to submit a foreign investment approval application to the Investment Commission of the R.O.C. MOEA,
or other government authority and enjoy benefits granted under the Statute for Foreigners Investment and the Statute for Overseas Chineses Investment. The Investment Commission of the R.O.C. MOEA or other government authority reviews
each foreign investment approval application and approves or disapproves the application after consultation with other governmental agencies, if necessary. Any non-R.O.C. person possessing a foreign investment approval may repatriate annual net
profits and interests attributable to an approved investment. Investment capital and capital gains attributable to the investment may be repatriated with approval of the Investment Commission of the R.O.C. MOEA or other government authority.

In addition to the general restrictions against direct investments by foreign investors in R.O.C. companies, foreign investors are currently
prohibited from investing in certain prohibited industries in Taiwan under the Negative List. The prohibition on direct foreign investment in the prohibited industries in the Negative List is absolute in the absence of a specific
exemption from the application of the Negative List. Under the Negative List, some other industries are restricted so that foreign investors may directly invest only up to a specified level and with the specific approval of the relevant authority
responsible for enforcing the legislation that the Negative List is intended to implement. Our business does not operate in a restricted industry under the Negative List.

In June 2009, the R.O.C. MOEA further allowed PRC persons to make direct investments in Taiwan. However, such direct investment is still
subject to various restrictions, such as that that only the industries listed in the Positive List, as promulgated by the Executive Yuan, are legally permitted targets and that all the PRC persons who wish to make direct investments in R.O.C. are
required to submit an investment approval application to the Investment Commission of the R.O.C. MOEA.



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Exchange Controls

Taiwans Foreign Exchange Control Statute and regulations provide that all foreign exchange transactions must be executed by banks
designated to handle foreign exchange transactions by the Ministry of Finance and the CBC. Current regulations favor trade-related foreign exchange transactions. Consequently, foreign currency earned from exports of merchandise and services may now
be retained and used freely by exporters. All foreign currency needed for the importation of merchandise and services may be purchased from the designated foreign exchange banks.

Aside from trade-related foreign exchange transactions, R.O.C. companies and residents may remit to and from Taiwan foreign currencies of up
to US$50 million (or its equivalent) and US$5 million, (or its equivalent) respectively in each calendar year. These limits apply to remittances involving a conversion between NT dollars and U.S. dollars or other foreign currencies. A requirement is
also imposed on all private enterprises to register all medium- and long-term foreign debt with the CBC.

In addition, foreign currency
earned from or needed to be paid for direct investment or portfolio investments, which are approved by the competent authorities, may be retained or sold by the investors or purchased freely from the designated bank.

Aside from the transactions discussed above, a foreign person without an alien resident card (or who has relevant resident card with a
validity of less than one year) or an unrecognized foreign entity may remit to and from Taiwan foreign currencies of up to US$100,000 per remittance without obtaining prior approval or permit if required documentation is provided to Taiwan
authorities. This limit applies to remittances involving a conversion between NT dollars and U.S. dollars or other foreign currencies.

Depositary
Receipts

In April 1992, the R.O.C. SFB (the predecessor of the R.O.C. FSC) began allowing R.O.C. companies listed on the Taiwan Stock
Exchange to sponsor the issuance and sale of depositary receipts evidencing depositary shares. Notifications for these issuances are still required. In December 1994, the Ministry of Finance began allowing companies whose shares are traded on the
Taipei Exchange to sponsor the issuance and sale of depositary receipts evidencing depositary shares. On October 24, 2002, the R.O.C. SFB began allowing public companies that are not listed on the Taiwan Stock Exchange or the Taipei Exchange to
sponsor the issuance and sale of depositary receipts by way of private placements outside the R.O.C.

A holder of depositary shares
wishing to withdraw common shares underlying depositary shares is required to appoint a local agent or representative with qualifications set forth by the R.O.C. FSC to, among other things, open a securities trading account with a local brokerage
firm, pay R.O.C. taxes, remit funds, and exercise stockholders right. In addition, the withdrawing holder is also required to appoint a custodian bank or a securities firm with qualifications set forth by the R.O.C. FSC to hold payments and
the securities in safekeeping, make confirmations, settle trades and report all relevant information in which the securities firm is appointed as the custodian, and the payments be held in safekeeping in a special account opened in a bank approved
by the R.O.C. FSC. Without making this appointment and the opening of accounts, the withdrawing holder would be unable to subsequently sell the common shares withdrawn from a depositary receipt facility on either the Taiwan Stock Exchange or the
Taipei Exchange.

After the issuance of a depositary share, a holder of the depositary share may immediately, comparing to a three-month
waiting period restriction which was lifted in 2003, request the depositary issuing the depositary share to cause the underlying common shares to be sold in the R.O.C. or to withdraw the common shares represented by the depositary receipt and
deliver the common shares to the holder. On April 30, 2009 and July 3, 2009, the R.O.C. Executive Yuan approved the Regulations Governing Securities Investment and Futures Trading in Taiwan by Mainland Area Investors and the Regulations Governing
Investment in Taiwan by Mainland Area Persons, respectively, under which qualified PRC persons are permitted to invest in Taiwan companies under limited circumstances, including purchase of the depositary receipts issued by a Taiwan company.
However, prior approval from the Investment Commission of the R.O.C. Ministry of Economic Affairs is required for a qualified PRC persons ownership of 10% or more of the issued and outstanding share capital of a listed R.O.C. company or
certain other manners of investment by a qualified PRC person.



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No deposits of common shares may be made in a depositary receipt facility and no depositary
receipts may be issued against deposits without specific R.O.C. FSC approval, unless they are:



| | (1) | stock dividends;
| | --- | ----------------



| | (2) | free distributions of common shares;
| | --- | ------------------------------------



| | (3) | due to the exercise by a holder of his or her preemptive rights in the event of capital increases for cash; or
| | --- | --------------------------------------------------------------------------------------------------------------



| | (4) | permitted under the deposit agreement and the custody agreement, due to the direct purchase of common shares or purchase through the depositary in the domestic market or the surrender of common shares under the
possession of investors and then delivery of such common shares to the custodian for deposit in the depositary receipt facility, provided that the total number of depositary receipts outstanding after an issuance cannot exceed the number of issued
depositary shares previously approved by the R.O.C. FSC in connection with the offering plus any depositary shares issued pursuant to the events described in (1), (2) and (3) above. These issuances may only be made to the extent previously issued
depositary shares have been withdrawn.
| | --- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

A depositary may convert New Taiwan dollars from the proceeds of the sale of common
shares or cash distributions received into other currencies, including U.S. dollars. A depositary may be required to obtain foreign exchange approval from the CBC on a payment-by-payment basis for conversion into New Taiwan dollars of subscription
payments for rights offerings or conversion into foreign currencies from the proceeds from the sale of subscription rights for new common shares. It is expected that the CBC will grant this approval as a routine matter.

A holder of depositary shares may convert NT dollars into other currencies from proceeds from the sale of any underlying common shares.
Proceeds from the sale of the underlying common shares withdrawn from the depositary receipt facility may be used for reinvestment in securities listed on both the Taiwan Stock Exchange and the Taipei Exchange, provided that the investor designates
a local securities firm or financial institution as agent to open an NT dollar bank account in advance.



|E. | Taxation
|-- | --------

R.O.C. Tax Considerations

The following summarizes the principal R.O.C. tax consequences of owning and disposing of the ADSs or common shares to a holder of ADSs or
common shares that is not a resident of the R.O.C. A foreign individual holder will be considered as not a resident of the R.O.C., or a non-R.O.C. resident, for the purposes of this section if he or she is not physically present in Taiwan for 183
days or more during any calendar year. An entity holder will be considered as not a resident of the R.O.C., or a non-R.O.C. resident, if it is organized under the laws of a jurisdiction other than Taiwan for profit making purpose and has no fixed
place of business or other permanent establishment or business agent in the R.O.C. Prospective purchasers of ADSs or common shares should consult their own tax advisors concerning the tax consequences of owning ADSs or common shares in the R.O.C.
and any other relevant taxing jurisdiction to which they are subject.



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Dividends

Dividends, whether in cash or common shares, declared by us out of retained earnings and paid out to a holder that is not an R.O.C. resident in
respect of common shares represented by ADSs are subject to R.O.C. withholding tax at the time of distribution. The rate of withholding is currently 20% of the amount of the distribution in the case of cash dividends or of the par value of the
common shares distributed in the case of stock dividends. Under current practice adopted by tax authorities, a 20% withholding rate is applied to a non-R.O.C. resident ADS holder without requiring the holder to apply for or obtain foreign investment
approval. As discussed in the section Tax Reform below, certain of our retained earnings will be subject to a 10% undistributed retained earnings tax. To the extent dividends are paid out of retained earnings that have been subject
to the retained earnings tax, up to a maximum amount of half of the amount of such tax will be used by us to offset a non-R.O.C. residents withholding tax liability on such dividend. Consequently, the effective rate of withholding on dividends
paid out of retained earnings previously subject to the retained earnings tax may be less than 20%. There is no withholding tax with respect to stock dividends declared out of our capital surplus of premiums from issuing stock resulting from the
capital paid by the shareholders.

Capital Gains

The R.O.C. Income Tax Act was amended and promulgated on December 2, 2015 and took effect from January 1, 2016. According to the newly amended
R.O.C. Income Tax Act, the provisions regarding the capital gain from securities transaction were deleted. Accordingly, under the R.O.C. law, gains realized on R.O.C. securities transactions are primarily exempt from income tax.

Subject to the AMT Act, gains realized from various securities transactions by an R.O.C.-resident entity shall be calculated as taxable income
for the purpose of the AMT Act and may further be subject to income tax. If the above entity has held common shares for more than three (3) years, 50% of capital gain may be exempted from AMT. In addition, gains realized from transfers of ADSs by
non-R.O.C. resident holders are not regarded as income from sources in the R.O.C. and, as a result, any gains derived therefrom are currently not subject to R.O.C. income tax.

Securities Transaction Tax

The
R.O.C. government imposes a securities transaction tax that will apply to sales of common shares, but not to sales of ADSs. The securities transaction tax, which is payable by the seller, is generally levied on sales of common shares at the rate of
0.3% of the sales proceeds. Withdrawals of our common shares from our depositary facility are not subject to the R.O.C. securities transaction tax.

Preemptive Rights

Distribution of
statutory preemptive rights for common shares by us in compliance with the R.O.C. Company Act is not subject to R.O.C. tax. Proceeds derived from sales of statutory preemptive rights evidenced by securities are subject to the R.O.C. securities
transaction tax, currently at the rate of 0.3% of the gross amount received, as well as the R.O.C. securities income tax. Proceeds derived from sales of statutory preemptive rights that are not evidenced by securities are subject to capital gains
tax at the rate of 20% of the gains realized for non-R.O.C. resident entities and non-R.O.C. resident individuals . Subject to compliance with the R.O.C. law, we have sole discretion to determine whether statutory preemptive rights are
evidenced by securities or not.

Estate Taxation and Gift Tax

R.O.C. estate tax is payable on any property within the R.O.C. of a deceased individual who is a non-resident individual or a non-R.O.C.
citizen and R.O.C. gift tax is payable on any property located within the R.O.C. donated by any such person. Under the newly amended Articles 13 and 19 of the R.O.C. Estate and Gift Tax Act, which became effective on January 23, 2009, estate tax is
currently payable at the rate of 10% and gift tax is payable at the rate of 10%. Under R.O.C. estate and gift tax laws, the common shares will be deemed located in the R.O.C. irrespective of the location of the owner. It is unclear whether a holder
of ADSs will be considered to own common shares for this purpose.



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Tax Treaties

The Republic of China does not have an income tax treaty with the United States. On the other hand, the Republic of China has income tax
treaties with Indonesia, Singapore, South Africa, Australia, Vietnam, New Zealand, Malaysia, Macedonia, Swaziland, the Netherlands, the United Kingdom, Gambia, Senegal, Sweden, Belgium, Denmark, Israel, Paraguay, Hungary, France, India, Slovakia,
Switzerland, Germany, Thailand, Kiribati, Luxembourg, and Austria which may limit the rate of Republic of China withholding tax on dividends paid with respect to common shares in Taiwan companies. It is unclear whether a non-R.O.C. holder of ADSs
will be considered to own common shares for the purposes of such treaties. Accordingly, a holder of ADSs who is otherwise entitled to the benefit of a treaty should consult its own tax advisors concerning eligibility for benefits under the treaty
with respect to the ADSs.

Tax Reform

In order to increase Taiwans competitiveness, an amendment to the R.O.C. Income Tax law was enacted on January 1, 1998, to integrate the
corporate income tax and the stockholder dividend tax with the aim of eliminating the double taxation effect for resident stockholders of Taiwanese corporations.

Under this amendment, a 10% retained earnings tax will be imposed on a company for its after-tax earnings generated after January 1, 1998 that
are not distributed in the following year. The retained earnings tax so paid will further reduce the retained earnings available for future distribution. When we declare dividends out of those retained earnings, up to a maximum amount of half of the
amount of such tax of the declared dividends will be credited against the 20% withholding tax imposed on the non-R.O.C. resident holders of our ADRs or common shares from January 1, 2015 onwards.

U.S. Federal Income Tax Considerations for U.S. Persons

The following is a summary of certain U.S. federal income tax consequences for beneficial owners of our common shares or ADSs, that hold the
common shares or ADSs as capital assets and that are U.S. holders that are not citizens of the R.O.C., do not have a permanent establishment in the R.O.C. and are not physically present in the R.O.C. for 183 days or more within a calendar year. You
are a U.S. holder if you are, for U.S. federal income tax purposes, any of the following:



| |  |  | an individual citizen or resident of the United States;
| | - |  | -------------------------------------------------------



| |  |  | a corporation (or other entity or arrangement treated as a corporation for U.S. federal income tax purposes) created or organized in or under the laws of the United States, any state thereof or the District of Columbia;
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | an estate the income of which is subject to U.S. federal income taxation regardless of its source;
| | - |  | --------------------------------------------------------------------------------------------------



| |  |  | a trust that is subject to the primary supervision of a court within the United States and that has one or more U.S. persons with the authority to control all substantial decisions of the trust; or
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | a trust that has a valid election in effect under applicable U.S. Treasury regulations to be treated as a U.S. person.
| | - |  | ----------------------------------------------------------------------------------------------------------------------

This summary is based on the provisions of the Internal Revenue Code of 1986, as amended, or the Code, and regulations, rulings and judicial
decisions thereunder as of the date hereof, and such authorities may be replaced, revoked or modified so as to result in U.S. federal income tax consequences different from those discussed below. It is for general purposes only and you should not
consider it to be tax advice. In addition, it is based in part on representations by the depositary and assumes that each obligation under the deposit agreement and any related agreement will be performed in accordance with its terms. This summary
does not represent a detailed description of all the U.S. federal income tax consequences to you in light of your particular circumstances and does not address the Medicare tax on net investment income or the effects of any state, local or non-U.S.
tax laws (or other U.S. federal tax consequences, such as U.S. federal estate or gift tax consequences). In addition, it does not represent a detailed description of the U.S. federal income tax consequences applicable to you if you are subject to
special treatment under the U.S. federal income tax laws, including if you are:



| |  |  | a dealer in securities or currencies;
| | - |  | -------------------------------------



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| |  |  | a trader in securities if you elect to use a mark-to-market method of accounting for your securities holdings;
| | - |  | --------------------------------------------------------------------------------------------------------------



| |  |  | a financial institution or an insurance company;
| | - |  | ------------------------------------------------



| |  |  | a tax-exempt organization;
| | - |  | --------------------------



| |  |  | a regulated investment company;
| | - |  | -------------------------------



| |  |  | a real estate investment trust;
| | - |  | -------------------------------



| |  |  | a person liable for alternative minimum tax;
| | - |  | --------------------------------------------



| |  |  | a person holding common shares or ADSs as part of a hedging, integrated or conversion transaction, constructive sale or straddle;
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------



| |  |  | a partnership or other pass-through entity for U.S. federal income tax purposes;
| | - |  | --------------------------------------------------------------------------------



| |  |  | a person owning, actually or constructively, 10% or more of our voting stock; or
| | - |  | --------------------------------------------------------------------------------



| |  |  | a U.S. holder whose functional currency is not the U.S. dollar.
| | - |  | -----------------------------------------------------------------

We cannot assure
you that a later change in law will not alter significantly the tax considerations that we describe in this summary.

If a partnership
holds our common shares or ADSs, the tax treatment of a partner will generally depend upon the status of the partner and the activities of the partnership. If you are a partner of a partnership holding our common shares or ADSs, you should consult
your tax advisor.

You should consult your own tax advisor concerning the particular U.S. federal income tax consequences to you of the
ownership and disposition of the common shares or ADSs, as well as the consequences to you arising under the laws of any other taxing jurisdiction.

In general, for U.S. federal income tax purposes, a U.S. person who is the beneficial owner of an ADS will be treated as the owner of the
common shares underlying its ADS. Accordingly, deposits or withdrawals of common shares by U.S. holders for ADSs generally will not be subject to U.S. federal income tax.

Taxation of Dividends

Except as
discussed below with respect to the passive foreign investment company rules, the amount of distributions (including net amounts withheld in respect of R.O.C. withholding taxes) you receive on your common shares or ADSs (other than certain pro rata
distributions of common shares to all stockholders) will generally be treated as dividend income to you if the distributions are made from our current and accumulated earnings and profits as calculated according to U.S. federal income tax
principles. In determining the net amounts withheld in respect of R.O.C. taxes, any reduction in the amount withheld on account of an R.O.C. credit in respect of the 10% retained earnings tax imposed on us is not considered a withholding tax and
will not be treated as distributed to you or creditable by you against your U.S. federal income tax. Such income (including withheld taxes) will be includible in your gross income as ordinary income on the day you actually or constructively receive
it, which in the case of an ADS will be the date actually or constructively received by the depositary. The amount of any distribution of property other than cash will be the fair market value of such property on the date it is distributed. You will
not be entitled to claim a dividend received deduction with respect to distributions you receive from us.



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With respect to non-corporate U.S. holders (including individuals), certain dividends received
from a qualified foreign corporation may be subject to reduced rates of taxation. A foreign corporation is treated as a qualified foreign corporation with respect to dividends paid by that corporation on common shares (or ADSs backed by such common
shares) that are readily tradable on an established securities market in the United States. U.S. Treasury Department guidance indicates that our ADSs (which are listed on the NYSE), but not our common shares, are readily tradable on an established
securities market in the United States. Thus, subject to the discussion below with respect to the passive foreign investment company rules, we believe that dividends we pay on our ADSs will meet the conditions required for these reduced tax rates.
Since we do not expect that our common shares will be listed on an established securities market in the United States, we do not believe that dividends we pay on our common shares that are not backed by ADSs currently meet the conditions required
for these reduced tax rates. Moreover, there can be no assurance that our ADSs will continue to be readily tradable on an established securities market in later years. Non-corporate U.S. holders that do not meet a minimum holding period requirement
during which they are not protected from the risk of loss or that elect to treat the dividend income as investment income pursuant to Section 163(d) (4) of the Code will not be eligible for the reduced rates of taxation regardless of our
status as a qualified foreign corporation. In addition, the rate reduction will not apply to dividends if the recipient of a dividend is obligated to make related payments with respect to positions in substantially similar or related property. This
disallowance applies even if the minimum holding period has been met. Non-corporate U.S. holders will also not be eligible for the reduced rates of taxation on dividends if we are a PFIC in the taxable year in which such dividends are paid or in the
preceding taxable year. U.S. holders should consult their own tax advisors regarding the application of these rules given their particular circumstances.

The amount of any dividend paid in NT dollars will equal the U.S. dollar value of the NT dollars you receive (calculated by reference to the
exchange rate in effect on the date you actually or constructively receive the dividend, which in the case of an ADS will be the date actually or constructively received by the depositary), regardless of whether the NT dollars are actually converted
into U.S. dollars. If the NT dollars received as a dividend are converted into U.S. dollars on the date they are actually or constructively received, you generally will not be required to recognize foreign currency gain or loss with respect of the
dividend income. If the NT dollars received as a dividend are not converted into U.S. dollars on the date of receipt, you will have a basis in the NT dollars equal to their U.S. dollar value on the date of receipt. Any gain or loss you realize if
you subsequently sell or otherwise dispose of the NT dollars will be ordinary income or loss from sources within the United States for foreign tax credit limitation purposes.

Subject to certain limitations under the Code, you may be entitled to a credit or deduction against your U.S. federal income taxes for the net
amount of any R.O.C. taxes that are withheld from dividend distributions made to you. The election to receive a credit or deduction must be made annually, and applies to all foreign taxes for the applicable tax year. The limitation on foreign taxes
eligible for credit is calculated separately with respect to specific classes of income. For this purpose, dividends we pay with respect to common shares or ADS will generally be considered passive category income from sources outside the United
States. Furthermore, you will not be allowed a foreign tax credit for foreign taxes imposed on dividends paid on common shares or ADSs if you (1) have held the common shares or ADSs for less than a specified minimum period during which you are not
protected from risk of loss, or (2) are obligated to make payments related to the dividends. The rules governing the foreign tax credit are complex. We therefore urge you to consult your tax advisors regarding the availability of the foreign tax
credit under your particular circumstances.

To the extent that the amount of any distribution you receive exceeds our current and
accumulated earnings and profits for a taxable year, as determined under U.S. federal income tax principles, the distribution will first be treated as a tax-free return of capital, causing a reduction in your adjusted basis in the common shares or
ADSs and thereby increasing the amount of gain, or decreasing the amount of loss, you will recognize on a subsequent disposition of the common shares or ADSs. The balance in excess of adjusted basis, if any, will be taxable to you as capital gain
recognized on a sale or exchange. However, we do not expect to keep earnings and profits in accordance with U.S. federal income tax principles. Therefore, you should expect that a distribution will generally be treated as a dividend (as discussed
above).



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It is possible that pro rata distributions of common shares or ADSs to all stockholders may be
made in a manner that is not subject to U.S. federal income tax. In the event that such distributions are tax-free, the basis of any new common shares or ADSs so received will generally be determined by allocating the U.S. holders basis in the
old common shares or ADSs between the old common shares or ADSs and the new common shares or ADSs, based on their relative fair market values on the date of distribution. For U.S. federal income tax purposes, any such tax-free share or ADS
distribution generally would not result in foreign source income to you. Consequently, you may not be able to use the foreign tax credit associated with any R.O.C. withholding tax imposed on such distributions unless you can use the credit against
U.S. federal income tax due on other foreign source income in the appropriate category for foreign tax credit purposes. You should consult your own tax advisors regarding all aspects of the foreign tax credit.

Taxation of Capital Gains

Except
as discussed below with respect to the passive foreign investment company rules, when you sell or otherwise dispose of your common shares or ADSs, you will generally recognize capital gain or loss in an amount equal to the difference between the
U.S. dollar value of the amount realized for the common shares or ADSs and your basis in the common shares or ADSs, determined in U.S. dollars. If you are an individual or other non-corporate holder, and the common shares or ADSs being sold or
otherwise disposed of are capital assets that you have held for more than one year, your gain recognized will be eligible for reduced rates of taxation. Your ability to deduct capital losses is subject to limitations. Any gain or loss you recognize
will generally be treated as U.S. source gain or loss for foreign tax credit limitation purposes. Consequently, you may not be able to use the foreign tax credit arising from any R.O.C. tax imposed on the disposition of common shares or ADSs unless
such credit can be applied (subject to applicable limitations) against tax due on other income treated as derived from foreign sources.

If you pay any R.O.C. securities transaction tax, such tax is not treated as an income tax for U.S. federal income tax purposes, and therefore
will not be a creditable foreign tax for U.S. federal income tax purposes. However, subject to limitations under the Code, such tax may be deductible. You are urged to consult your tax advisors regarding the U.S. federal income tax consequences of
these taxes.

Passive Foreign Investment Company

Based on the composition of our income and valuation of our assets, including goodwill, we do not believe that we are currently (or that we
were in 2015) a passive foreign investment company, or PFIC, and we do not expect to become one in the future, although there can be no assurance in this regard.

In general, a company is considered a PFIC for any taxable year if either:



| |  |  | at least 75% of its gross income is passive income, which generally includes income derived from certain dividends, interest, royalties and rents (other than royalties and rents derived in the active conduct of a trade
or business and not derived from a related person), annuities or property transactions; or
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | at least 50% of the value of its assets is attributable to assets that produce or are held for the production of passive income.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------

The 50% of value test is based on the average of the value of our assets for each quarter during the taxable year. If we own at least 25% by
value of another companys stock, we will be treated, for purposes of the PFIC rules, as owning our proportionate share of the assets and receiving our proportionate share of the income of that company.

In addition, the determination of whether we are a PFIC is made annually. Accordingly, it is possible that we may become a PFIC in the current
or any future taxable year due to changes in our asset or income composition. Because we have valued our goodwill based on the market value of our common shares, a decrease in the price of our common shares may also result in our becoming a PFIC. If
we are a PFIC for any taxable year during which you hold common shares or ADSs, you will be subject to special tax rules discussed below.



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If we are a PFIC for any taxable year during which you hold common shares or ADSs, you will be
subject to special tax rules with respect to any excess distribution that you receive and any gain you realize from a sale or other disposition (including a pledge) of common shares or ADSs. Distributions you receive in a taxable year
that are greater than 125% of the average annual distributions you received during the shorter of the three preceding taxable years or your holding period for common shares or ADSs will be treated as excess distributions. Under these special tax
rules:



| |  |  | the excess distribution or gain will be allocated ratably over your holding period for common shares or ADSs;
| | - |  | -------------------------------------------------------------------------------------------------------------



| |  |  | the amount allocated to the current taxable year, and any taxable year prior to the first taxable year in which we were a PFIC, will be treated as ordinary income; and
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | the amount allocated to each other year will be subject to tax at the highest tax rate in effect for that year and the interest charge generally applicable to underpayments of tax will be imposed on the resulting tax
attributable to each such year.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

If you hold common shares or ADSs in any year in which we are a PFIC, you are required to
file Internal Revenue Service Form 8621.

If we are a PFIC for any taxable year and any of our non-U.S. subsidiaries is also a PFIC, a
U.S. Holder would be treated as owning a proportionate amount (by value) of the common shares of the lower-tier PFIC for purposes of the application of these rules. You are urged to consult your tax advisors about the application of the PFIC rules
to any of our subsidiaries.

Under certain circumstances, a U.S. holder, in lieu of being subject to the excess distribution rules
discussed above, may make an election to include gain on the stock of a PFIC as ordinary income under a mark-to-market method provided that such stock is regularly traded on a qualified exchange. Under this method, any difference between the
stocks fair market value and its adjusted basis at the end of the year is accounted for by either an inclusion in income or, subject to limitations, a deduction from income, as described below. Under current U.S. Treasury Department guidance,
the mark-to-market election may be available to holders of ADSs because the ADSs are listed on the NYSE, which constitutes a qualified exchange, although there can be no assurance that the ADSs will be regularly traded for purposes of
the mark-to-market election. You should also note that only the ADSs and not the common shares are listed on the NYSE. Our common shares are listed on the Taiwan Stock Exchange, which must meet certain trading, listing, financial disclosure and
other requirements to be treated as a qualified exchange under applicable U.S. Treasury regulations for purposes of the mark-to-market election, and no assurance can be given that the common shares will be regularly traded for purposes
of the mark-to-market election.

If you make an effective mark-to-market election, you will include in income each year that we are a PFIC
as ordinary income the excess of the fair market value of your common shares or ADSs at the end of the year over your adjusted tax basis in the common shares or ADSs. You will be entitled to deduct as an ordinary loss each year the excess of your
adjusted tax basis in the common shares or ADSs over their fair market value at the end of the year, but only to the extent of the net amount previously included in income as a result of the mark-to-market election. If you make an effective
mark-to-market election, in each year that we are a PFIC any gain you recognize upon the sale or other disposition of your common shares or ADSs will be treated as ordinary income and any loss will be treated as ordinary loss, but only to the extent
of the net amount of previously included income as a result of the mark-to-market election.

Your adjusted tax basis in common shares or
ADSs will be increased by the amount of any income inclusion and decreased by the amount of any deductions under the mark-to-market rules. If you make a mark-to-market election it will be effective for the taxable year for which the election is made
and all subsequent taxable years unless the common shares or ADSs are no longer regularly traded on a qualified exchange or the Internal Revenue Service consents to the revocation of the election. You should consult your tax advisors about the
availability of the mark-to-market election, and whether making the election would be advisable under your particular circumstances.



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Alternatively, a U.S. holder of common shares or ADSs in a PFIC can sometimes avoid the rules
described above by electing to treat the PFIC as a qualified electing fund under Section 1295 of the Code. This option is not available to you because we do not intend to comply with the requirements necessary to permit you to make this
election.

Non-corporate U.S. holders will not be eligible for reduced rates of taxation on any dividends received from us if we are a
PFIC in the taxable year in which such dividends are paid or in the preceding taxable year. You should consult your own tax advisors concerning the U.S. federal income tax consequences of holding common shares or ADSs if we are considered a PFIC in
any taxable year.

Information Reporting and Backup Withholding

In general, unless you are an exempt recipient such as a corporation, information reporting will apply to dividends in respect of the common
shares or ADSs and to the proceeds from the sale, exchange or redemption of your common shares or ADSs that are paid to you within the United States (and in some cases, outside of the United States). Additionally, if you fail to provide your
taxpayer identification number, or fail either to report in full dividend and interest income or to make the necessary certifications of other exempt status, you may be subject to backup withholding.

Any amounts withheld under the backup withholding rules will be allowed as a refund or a credit against your U.S. federal income tax
liability, provided you furnish the required information to the Internal Revenue Service.



|F. | Dividends and Paying Agents
|-- | ---------------------------

Not applicable.



|G. | Statement by Experts
|-- | --------------------

Not applicable.



|H. | Documents on Display
|-- | --------------------

We have filed this annual report on Form 20-F, including exhibits,
with the Securities and Exchange Commission. As allowed by the Securities and Exchange Commission, in Item 19 of this annual report, we incorporate by reference certain information we filed with the Securities and Exchange Commission. This means
that we can disclose important information to you by referring you to another document filed separately with the Securities and Exchange Commission. The information incorporated by reference is considered to be part of this annual report.

You may read and copy this annual report, including the exhibits incorporated by reference in this annual report, at the Securities and
Exchange Commissions Public Reference Room at 100 F Street, N.E., Washington, D.C. 20549 and at the Securities and Exchange Commissions regional offices in New York, New York and Chicago, Illinois. You can also request copies of this
annual report, including the exhibits incorporated by reference in this annual report, upon payment of a duplicating fee, by writing information on the operation of the Securities and Exchange Commissions Public Reference Room.

The Securities and Exchange Commission also maintains a website at www.sec.gov that contains reports, proxy statements and other information
regarding registrants that file electronically with the Securities and Exchange Commission. Our annual report and some of the other information submitted by us to the Securities and Exchange Commission may be accessed through this web site.



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|I. | Subsidiary Information
|-- | ----------------------

Not applicable.



|ITEM 11. | QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
|-------- | ----------------------------------------------------------

Market risk is the risk of
loss related to adverse changes in market prices, including interest rates and foreign exchange rates, of financial instruments. We are exposed to various types of market risks, including changes in interest rates and foreign currency exchange
rates, in the normal course of business.

We use financial instruments, including variable rate debt and swaps and foreign exchange spot
transactions, to manage risks associated with our interest rate and foreign currency exposures through a controlled program of risk management in accordance with established policies. These policies are reviewed and approved by our board of
directors and stockholders meeting. Our treasury operations are subject to internal audit on a regular basis. We do not hold or issue derivative financial instruments for speculatively purposes.

Since export sales are primarily conducted in U.S. dollars, we had U.S. dollar-denominated accounts receivable of US$536 million as of
December 31, 2015. As of the same date, we also had Japanese Yen-denominated accounts receivable of ¥8,552 million attributable to our Japanese operations and Renminbi-denominated accounts receivable of RMB¥4 million attributable to our
China operations. We had U.S. dollar- and Japanese Yen-denominated accounts payables of US$110 million and ¥1,277 million, respectively, as of December 31, 2015.

Our primary market risk exposures relate to interest rate movements on borrowings and exchange rate movements on foreign currency-denominated
accounts receivable, capital expenditures relating to equipment used in manufacturing processes (including photo etching and chemical vapor deposition) and purchased primarily from Europe, Japan and the United States.

The following table provides information as of December 31, 2015 on our market risk sensitive financial instruments.



|                                      |  |                         |        |  |             |  |        | 
|------------------------------------- |  | ----------------------- | ------ |  | ----------- |  | ------ | 
|                                      |  | As of December 31, 2015 |       
|                                      |  | Book Amount             |        |  | Fair Amount | 
|                                      |  | (in NT$ millions)       |       
|Time Deposits: Non-Trading Purpose    |  |                         | 35,029 |  |             |  | 35,029 | 
|Short-term Loans: Non-Trading Purpose |  |                         | 5,505  |  |             |  | 5,505  | 
|Bonds: Non-Trading Purpose            |  |                         | 41,637 |  |             |  | 42,326 | 
|Long-term Loans: Non-Trading Purpose  |  |                         | 12,489 |  |             |  | 12,489 | 

Interest Rate Risk

Our major market risk exposure is changing interest rates. Our exposure to market risk for changes in interest rates relates primarily to our
long-term debt obligations. We primarily enter into debt obligations to support general corporate purposes including capital expenditures and working capital needs.



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The tables below provide information of UMC as of December 31, 2015 about our financial
instruments that are sensitive to changes in interest rates, including debt obligations and certain assets. For debt obligations, the table presents principal cash flows and related weighted average interest rates by expected maturity dates. The
information is presented in the currencies in which the instruments are denominated.



|                           |  |                                   |       |   |                         |  |       |      |  |  |       |   |  |                    |       |   |       |  |       |            |  |  |        |   |  |  |        |  
|-------------------------- |  | --------------------------------- | ----- | - | ----------------------- |  | ----- | ---- |  |  | ----- | - |  | ------------------ | ----- | - | ----- |  | ----- | ---------- |  |  | ------ | - |  |  | ------ | -
|                           |  | Expected Maturity Dates           |       |   | As of December 31, 2015 | 
|                           |  | 2016                              |       |   | 2017                    |  |       | 2018 |  |  | 2019  |   |  | 2020 andthereunder |       |   | Total |  |       | Fair Value | 
|                           |  | (in millions, except percentages) |      
|Time Deposits:             |  |                                   |       |   |                         |  |       |      |  |  |       |   |  |                    |       |   |       |  |       |            |  |  |        |   |  |  |        |  
|Fixed Rate (US$)           |  |                                   | 702   |   |                         |  |      |      |  |  |      |   |  |                    |      |   |       |  |      |            |  |  | 702    |   |  |  | 702    |  
|Average Interest Rate      |  |                                   | 0.51  | % |                         |  |      |      |  |  |      |   |  |                    |      |   |       |  |      |            |  |  | 0.51   | % |  |  | 0.51   | %
|Fixed Rate (¥ JPY)         |  |                                   | 5,000 |   |                         |  |      |      |  |  |      |   |  |                    |      |   |       |  |      |            |  |  | 5,000  |   |  |  | 5,000  |  
|Average Interest Rate      |  |                                   | 0.01  | % |                         |  |      |      |  |  |      |   |  |                    |      |   |       |  |      |            |  |  | 0.01   | % |  |  | 0.01   | %
|Fixed Rate (RMB¥)          |  |                                   | 903   |   |                         |  |      |      |  |  |      |   |  |                    |      |   |       |  |      |            |  |  | 903    |   |  |  | 903    |  
|Average Interest Rate      |  |                                   | 1.92  | % |                         |  |      |      |  |  |      |   |  |                    |      |   |       |  |      |            |  |  | 1.92   | % |  |  | 1.92   | %
|Fixed Rate (NT$)           |  |                                   | 5,713 |   |                         |  |      |      |  |  |      |   |  |                    |      |   |       |  |      |            |  |  | 5,713  |   |  |  | 5,713  |  
|Average Interest Rate      |  |                                   | 0.38  | % |                         |  |      |      |  |  |      |   |  |                    |      |   |       |  |      |            |  |  | 0.38   | % |  |  | 0.38   | %
|Short-term Loans:          |  |                                   |       |   |                         |  |       |      |  |  |       |   |  |                    |       |   |       |  |       |            |  |  |        |   |  |  |        |  
|Variable Rate (US$)        |  |                                   | 130   |   |                         |  |      |      |  |  |      |   |  |                    |      |   |       |  |      |            |  |  | 130    |   |  |  | 130    |  
|Average Interest Rate      |  |                                   | 1.00  | % |                         |  |      |      |  |  |      |   |  |                    |      |   |       |  |      |            |  |  | 1.00   | % |  |  | 1.00   | %
|Variable Rate ((RMB¥)      |  |                                   | 234   |   |                         |  |      |      |  |  |      |   |  |                    |      |   |       |  |      |            |  |  | 234    |   |  |  | 234    |  
|Average Interest Rate      |  |                                   | 4.39  | % |                         |  |      |      |  |  |      |   |  |                    |      |   |       |  |      |            |  |  | 4.39   | % |  |  | 4.39   | %
|Variable Rate (NT$)        |  |                                   | 56    |   |                         |  |      |      |  |  |      |   |  |                    |      |   |       |  |      |            |  |  | 56     |   |  |  | 56     |  
|Average Interest Rate      |  |                                   | 1.56  | % |                         |  |      |      |  |  |      |   |  |                    |      |   |       |  |      |            |  |  | 1.56   | % |  |  | 1.56   | %
|Unsecured Long-term Loans: |  |                                   |       |   |                         |  |       |      |  |  |       |   |  |                    |       |   |       |  |       |            |  |  |        |   |  |  |        |  
|Variable Rate (NT$)        |  |                                   | 6,480 |   |                         |  | 2,772 |      |  |  | 474   |   |  |                    | 1,000 |   |       |  |      |            |  |  | 10,726 |   |  |  | 10,726 |  
|Average Interest Rate      |  |                                   | 1.27  | % |                         |  | 1.27  | %    |  |  | 1.27  | % |  |                    | 1.27  | % |       |  |      |            |  |  | 1.27   | % |  |  | 1.27   | %
|Secured Long-term Loans:   |  |                                   |       |   |                         |  |       |      |  |  |       |   |  |                    |       |   |       |  |       |            |  |  |        |   |  |  |        |  
|Variable Rate (NT$)        |  |                                   | 122   |   |                         |  | 248   |      |  |  | 550   |   |  |                    | 524   |   |       |  | 328   |            |  |  | 1,771  |   |  |  | 1,771  |  
|Average Interest Rate      |  |                                   | 2.41  | % |                         |  | 15.98 | %    |  |  | 8.27  | % |  |                    | 8.55  | % |       |  | 7.21  | %          |  |  | 7.50   | % |  |  | 7.50   | %
|Bonds:                     |  |                                   |       |   |                         |  |       |      |  |  |       |   |  |                    |       |   |       |  |       |            |  |  |        |   |  |  |        |  
|Unsecured (NT$)            |  |                                   |      |   |                         |  | 7,500 |      |  |  |      |   |  |                    |      |   |       |  |      |            |  |  | 7,500  |   |  |  | 7,542  |  
|Fixed Rate                 |  |                                   |      |   |                         |  | 1.43  | %    |  |  |      |   |  |                    |      |   |       |  |      |            |  |  | 1.43   | % |  |  | 1.43   | %
|Unsecured (NT$)            |  |                                   |      |   |                         |  |      |      |  |  |      |   |  |                    | 2,500 |   |       |  |      |            |  |  | 2,500  |   |  |  | 2,557  |  
|Fixed Rate                 |  |                                   |      |   |                         |  |      |      |  |  |      |   |  |                    | 1.63  | % |       |  |      |            |  |  | 1.63   | % |  |  | 1.63   | %
|Unsecured (NT$)            |  |                                   |      |   |                         |  |      |      |  |  | 7,500 |   |  |                    |      |   |       |  |      |            |  |  | 7,500  |   |  |  | 7,533  |  
|Fixed Rate                 |  |                                   |      |   |                         |  |      |      |  |  | 1.35  | % |  |                    |      |   |       |  |      |            |  |  | 1.35   | % |  |  | 1.35   | %
|Unsecured (NT$)            |  |                                   |      |   |                         |  |      |      |  |  |      |   |  |                    |      |   |       |  | 2,500 |            |  |  | 2,500  |   |  |  | 2,492  |  
|Fixed Rate                 |  |                                   |      |   |                         |  |      |      |  |  |      |   |  |                    |      |   |       |  | 1.50  | %          |  |  | 1.50   | % |  |  | 1.50   | %
|Unsecured (NT$)            |  |                                   |      |   |                         |  |      |      |  |  |      |   |  |                    |      |   |       |  | 2,000 |            |  |  | 2,000  |   |  |  | 1,998  |  
|Fixed Rate                 |  |                                   |      |   |                         |  |      |      |  |  |      |   |  |                    |      |   |       |  | 1.70  | %          |  |  | 1.70   | % |  |  | 1.70   | %
|Unsecured (NT$)            |  |                                   |      |   |                         |  |      |      |  |  |      |   |  |                    |      |   |       |  | 3,000 |            |  |  | 3,000  |   |  |  | 3,000  |  
|Fixed Rate                 |  |                                   |      |   |                         |  |      |      |  |  |      |   |  |                    |      |   |       |  | 1.95  | %          |  |  | 1.95   | % |  |  | 1.95   | %
|Unsecured (US$)            |  |                                   |      |   |                         |  |      |      |  |  |      |   |  |                    |      |   |       |  | 600   |            |  |  | 600    |   |  |  | 560    |  
|Fixed Rate                 |  |                                   |      |   |                         |  |      |      |  |  |      |   |  |                    |      |   |       |  | 0.00  | %          |  |  | 0.00   | % |  |  | 0.00   | %

Foreign Currency Risk

Although the majority of our transactions are in NT dollars, some transactions are based in other currencies. The primary foreign currency to
which we are exposed is the U.S. dollar. We have in the past, and may in the future, enter into short-term, foreign currency forward contracts to hedge the impact of foreign currency fluctuations on certain underlying assets, liabilities, and firm
commitments for operating expenses and capital expenditures denominated in U.S. dollars and other foreign currencies. The purpose of entering into these hedges is to minimize the impact of foreign currency fluctuations on the results of operations.
We use the policy of natural hedging to reduce our foreign exchange exposure arising out of changes in the rates of exchange among the U.S. dollar and other foreign currencies. As a general matter, our natural hedging strategy relies on matching
revenues and costs for the same currency or offsetting losses in one currency with gains in another.



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As of December 31, 2015, we had US$44 million outstanding in foreign currency forward contracts
to sell U.S. dollars against NT dollars, respectively.



|                                     |  |                                      |             |  |                         |  |   |      |  |  |      |  |  |                    |   |  |       |  |   |           |  |     |             |  |  |     |       | 
|------------------------------------ |  | ------------------------------------ | ----------- |  | ----------------------- |  | - | ---- |  |  | ---- |  |  | ------------------ | - |  | ----- |  | - | --------- |  | --- | ----------- |  |  | --- | ----- | 
|                                     |  | Expected Maturity Dates              |             |  | As of December 31, 2015 | 
|                                     |  | 2016                                 |             |  | 2017                    |  |   | 2018 |  |  | 2019 |  |  | 2020 andthereunder |   |  | Total |  |   | FairValue | 
|                                     |  | (in millions, except exchange rates) |            
|Foreign Currency Forward Contracts:  |  |                                      |             |  |                         |  |   |      |  |  |      |  |  |                    |   |  |       |  |   |           |  |     |             |  |  |     |       | 
|Sell US$ against NT$ Contract Amount |  | US$                                  | 44          |  |                         |  |  |      |  |  |     |  |  |                    |  |  |       |  |  |           |  | US$ | 44          |  |  | NT$ | 0.008 | 
|Average Contractual Exchange Rate    |  | US$                                  | 1=NT$32.915 |  |                         |  |  |      |  |  |     |  |  |                    |  |  |       |  |  |           |  | US$ | 1=NT$32.915 |  |  |     |      | 

Except for the market risks mentioned above, we believe that we did not have any other material market risks
as of December 31, 2015.



|ITEM 12. | DESCRIPTION OF SECURITIES OTHER THAN EQUITY SECURITIES
|-------- | ------------------------------------------------------



|A. | Debt Securities
|-- | ---------------

Not applicable.



|B. | Warrants and Rights
|-- | -------------------

Not applicable.



|C. | Other Securities
|-- | ----------------

Not applicable.



|D. | American Depositary Shares
|-- | --------------------------

Depositary Fees and Charges

Under the terms of the deposit agreement for our ADSs, an ADS holder may have to pay the following service fees to the depositary:



|                                                                                                  |  |                               
|------------------------------------------------------------------------------------------------- |  | ------------------------------
|Service                                                                                           |  | Fees                          
|Issuance of ADSs                                                                                  |  | Up to US$0.05 per ADS issued  
|Cancellation of ADSs                                                                              |  | Up to US$0.05 per ADS canceled
|Distribution of cash dividends or other cash distributions                                        |  | Up to US$0.05 per ADS held    
|Distribution of ADSs pursuant to stock dividends, free stock distributions or exercises of
rights |  | Up to US$0.05 per ADS held    
|Distribution of securities other than ADSs or rights to purchase additional ADSs                  |  | Up to US$0.05 per ADS held    

In addition, an ADS holder shall be responsible for the following charges:



| |  |  | taxes (including applicable interest and penalties) and other governmental charges;
| | - |  | -----------------------------------------------------------------------------------



| |  |  | such registration fees as may from time to time be in effect for the registration of common shares or other deposited securities on the share register and applicable to transfers of common shares or other deposited
securities to or from the name of the custodian, the depositary or any nominees upon the making of deposits and withdrawals, respectively;
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | such cable, telex and facsimile transmission and delivery expenses as are expressly provided in the deposit agreement to be at the expense of ADS holders and beneficial owners of ADSs;
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | the expenses and charges incurred by the depositary in the conversion of foreign currency;
| | - |  | ------------------------------------------------------------------------------------------



| |  |  | such fees and expenses as are incurred by the depositary in connection with compliance with exchange control regulations and other regulatory requirements applicable to common shares, deposited securities, ADSs and
ADRs;
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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| |  |  | the fees and expenses incurred by the depositary, the custodian or any nominee in connection with the servicing or delivery of deposited securities; and
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Depositary fees payable upon the issuance and cancellation of ADSs are typically paid to the depositary by the brokers (on behalf of their clients) receiving the newly-issued ADSs from the depositary and by the brokers
(on behalf of their clients) delivering the ADSs to the depositary for cancellation. The brokers in turn charge these transaction fees to their clients.
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Depositary fees payable in connection with distributions of cash or securities to ADS holders and the depositary services fee are charged by
the depositary to the holders of record of ADSs as of the applicable ADS record date. The depositary fees payable for cash distributions are generally deducted from the cash being distributed. In the case of distributions other than cash (i.e.,
stock dividends, rights offerings), the depositary charges the applicable fee to the ADS record date holders concurrent with the distribution. In the case of ADSs registered in the name of the investor (whether certificated or un-certificated in
direct registration), the depositary sends invoices to the applicable record date ADS holders. In the case of ADSs held in brokerage and custodian accounts via the central clearing and settlement system, The Depository Trust Company, or DTC, the
depositary generally collects its fees through the systems provided by DTC (whose nominee is the registered holder of the ADSs held in DTC) from the brokers and custodians holding ADSs in their DTC accounts. The brokers and custodians who hold their
clients ADSs in DTC accounts in turn charge their clients accounts the amount of the fees paid to the depositary.

In the
event of refusal to pay the depositary fees, the depositary may, under the terms of the deposit agreement, refuse the requested service until payment is received or may set off the amount of the depositary fees from any distribution to be made to
the ADS holder.

The fees and charges ADS holders may be required to pay may vary over time and may be changed by us and by the
depositary. ADS holders will receive prior notice of such changes.

Depositary Payments

In 2015, we received the following payments from JPMorgan Chase & Co., the depositary for our ADR program through December 31, 2015.



|                                                                                                   |  |            |              | 
|-------------------------------------------------------------------------------------------------- |  | ---------- | ------------ | 
|Service                                                                                            |  | Fees (US$) |             
|Reimbursement of listing fees                                                                      |  |            | 112,302.40   | 
|Reimbursement of U.S. SEC filing fees                                                              |  |            | 21,439.60    | 
|Reimbursement of accounting supporting fees for FASB and Public Company Accounting Oversight
Board |  |            | 1,960.00     | 
|Reimbursement of annual ordinary stockholders meeting expenses                                    |  |            | 11,256.09    | 
|Reimbursement of fees in connection with annual financial and Sarbanes-Oxley Act of 2002
audit     |  |            | 782,302.61   | 
|Contribution to our companys investor relations efforts                                           |  |            | 11,542.13    | 
|Others                                                                                             |  |            | 192,990.00   | 
|                                                                                                   |  |            |              | 
|Total                                                                                              |  |            | 1,133,792.84 | 
|                                                                                                   |  |            |              | 

PART II



|ITEM 13. | DEFAULTS, DIVIDEND ARREARAGES AND DELINQUENCIES
|-------- | -----------------------------------------------

None of these events occurred in any of
2013, 2014 and 2015.



|ITEM 14. | MATERIAL MODIFICATIONS TO THE RIGHTS OF SECURITY HOLDERS AND USE OF PROCEEDS
|-------- | ----------------------------------------------------------------------------

None.



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|ITEM 15. | CONTROLS AND PROCEDURES
|-------- | -----------------------

Disclosure Controls and Procedures

As of December 31, 2015, an evaluation has been carried out under the supervision and with the participation of our management, including our
Chief Executive Officer and our Chief Financial Officer, of the effectiveness of our disclosure controls and procedures, as such term is defined under Rules 13a-15(e) and 15d-15(e) promulgated under the Securities Exchange Act of 1934, as amended.
Based on that evaluation, our Chief Executive Officer and Chief Financial Officer have concluded that our disclosure controls and procedures were effective as of December 31, 2015.

Managements Annual Report on Internal Control over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in
Rule 13a-15(f) and 15d-15(f) under the Securities Exchange Act of 1934, as amended, for our company. A companys internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of
financial reporting and the preparation of financial statements in accordance with International Financial Reporting Standards as issued by International Accounting Standards Board.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of
any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

As required by Section 404 of the Sarbanes-Oxley Act of 2002 and related rules as promulgated by the Securities and Exchange Commission, our
management assessed the effectiveness of our internal control over financial reporting as of December 31, 2015 using the criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the
Treadway Commission (2013 framework), or the COSO criteria. Based on this assessment, our management concluded that our internal control over financial reporting was effective as of December 31, 2015 based on the COSO criteria. Our independent
registered public accounting firm, Ernst & Young has issued an attestation report with unqualified opinion on the effectiveness of our internal control over financial reporting as of December 31, 2015, which is included immediately following
this report.



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Attestation Report of the Independent Registered Public Accounting Firm

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Stockholders of United Microelectronics Corporation:

We have audited United Microelectronics Corporation and subsidiaries internal control over financial reporting as of December 31, 2015, based on
criteria established in Internal ControlIntegrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) (the COSO criteria). United Microelectronics Corporation and subsidiaries
management is responsible for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Managements Annual Report on
Internal Control over Financial Reporting. Our responsibility is to express an opinion on the companys internal control over financial reporting based on our audit.

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan
and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial
reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the
circumstances. We believe that our audit provides a reasonable basis for our opinion.

A companys internal control over financial reporting is a
process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A companys
internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company;
(2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made
only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the companys assets that could
have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or
detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or
procedures may deteriorate.

In our opinion, United Microelectronics Corporation and subsidiaries maintained, in all material respects, effective internal
control over financial reporting as of December 31, 2015, based onthe COSO criteria.

We also have audited, in accordance with the
standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheets of United Microelectronics Corporation and subsidiaries as of December 31, 2014 and 2015, and the related consolidated statements of
comprehensive income, changes in equity and cash flows for each of the three years in the period ended December 31, 2015 of United Microelectronics Corporation and subsidiaries and our report dated April 18, 2016 expressed an unqualified opinion
thereon.

/s/ Ernst & Young

Taipei, Taiwan

Republic of China

April 18, 2016



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Changes in Internal Control over Financial Reporting

There were no changes in our internal control over financial reporting that occurred during the years ended December 31, 2014 and 2015 that
have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

In 2013, we
adopted IFRSs for the first time to prepare our financial statements, and retrospectively adjusted our financial statements for the year ended December 31, 2012. We updated relevant controls in its financial statement process and reserves evaluation
process to ensure the effectiveness of internal control over financial reporting. We have performed appropriate tests to ensure the effectiveness of internal control over financial reporting, and did not find any significant issue.



|ITEM 16. | 
|-------- | 



|ITEM 16A. | AUDIT COMMITTEE FINANCIAL EXPERT
|--------- | --------------------------------

Our board of directors has determined that Cheng-Li
Huang and Wenyi Chu, two of our independent directors, qualify as audit committee financial experts as defined in Item 16A of Form 20-F and are independent in accordance with the applicable requirements of Rule 10A-3 of the Securities Exchange Act
of 1934 requirement.

The U.S. Securities and Exchange Commission has indicated that the designation of Dr. Huang and Dr. Chu as the audit
committee financial experts does not: (i) make Dr. Huang or Dr. Chu an expert for any purpose, including without limitation for purposes of Section 11 of the Securities Act of 1933, as amended, as a result of this designation; (ii)
impose any duties, obligations or liability on Dr. Huang or Dr. Chu that are greater than those imposed on them as a member of the audit committee and our board of directors in the absence of such designation; or (iii) affect the duties, obligations
or liability of any other member of the audit committee or our board of directors.



|ITEM 16B. | CODE OF ETHICS
|--------- | --------------

We amended the Code of Ethics for Directors and Officers in June 2009,
and the Employee Code of Conduct in October 2011. The Employee Code of Conduct, which is applicable to all employees, replaced the code of ethics filed with the Securities and Exchange Commission in our 2003 annual report on Form 20-F. We have also
created a separate code of ethics applicable to our directors and officers. A copy of each of the Code of Ethics for Directors and Officers and the Employee Code of Conduct are displayed on our website at http://www.umc.com/english/pdf/Code of
Ethics.pdf and http://www.umc.com/english/pdf/Code of Conduct.pdf, respectively. Stockholders may request a hard copy of the Code of Ethics for Directors and Officers and the Employee Code of Conduct free of charge. Please contact the investor
relations department of our company at ir@umc.com.



|ITEM 16C. | PRINCIPAL ACCOUNTANT FEES AND SERVICES
|--------- | --------------------------------------

The following table sets forth the aggregate
fees by categories specified below in connection with certain professional services rendered by Ernst & Young, our principal external auditors, for the years indicated.



|                       |  |                          |        |  |      |  |        |     |  |  |       | 
|---------------------- |  | ------------------------ | ------ |  | ---- |  | ------ | --- |  |  | ----- | 
|                       |  | Years ended December 31, |       
|                       |  | 2014                     |        |  | 2015 | 
|                       |  | NT$                      |        |  | NT$  |  |        | US$ | 
|                       |  | (in thousands)           |       
|Audit Fees (1)         |  |                          | 65,514 |  |      |  | 63,451 |     |  |  | 1,935 | 
|Audit-related Fees (2) |  |                          | 1,535  |  |      |  | 6,992  |     |  |  | 213   | 
|Tax Fees (3)           |  |                          | 3,266  |  |      |  | 4,487  |     |  |  | 137   | 
|                       |  |                          |        |  |      |  |        |     |  |  |       | 
|Total                  |  |                          | 70,315 |  |      |  | 74,930 |     |  |  | 2,285 | 
|                       |  |                          |        |  |      |  |        |     |  |  |       | 



|(1) | Audit fees consist of fees associated with the annual audit, review of our quarterly financial statements, statutory audits and internal control review. They also include fees billed for those services that are normally
provided by the independent accountants in connection with statutory and regulatory filings.
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(2) | Audit-related fees consist of fees billed for assurance and services related to the performance of the audit or review of our financial statements but not described in footnote (1) above. These services include review
of regulatory checklist for the adoption of our employee stock option plan, certification of our Singapore Branch to Singapore authorities and application for corporation registration.
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(3) | Tax fees include fees billed for professional services rendered by Ernst & Young, primarily in connection with our tax compliance activities.
|--- | ---------------------------------------------------------------------------------------------------------------------------------------------



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All audit and non-audit services performed by Ernst & Young were pre-approved by our audit
committee. In certain circumstances, the audit committee delegates to one designated member to pre-approve such audit and non-audit services. Pre-approval by a designated member should be reported to the audit committee at its upcoming meeting.



|ITEM 16D. | EXEMPTIONS FROM THE LISTING STANDARDS FOR AUDIT COMMITTEES
|--------- | ----------------------------------------------------------

None.



|ITEM 16E. | PURCHASE OF EQUITY SECURITIES BY THE ISSUER AND AFFILIATED PURCHASERS
|--------- | ---------------------------------------------------------------------

Since March 2004,
we have from time to time announced plans, which were not binding on us, to buy back our common shares up to a certain amount on the Taiwan Stock Exchange. On July 29, 2015, we announced our 16th
share buy-back plan since our board of directors resolved to purchase up to 200 million shares on the Taiwan Stock Exchange at a price between NT$7.55 and NT$18.80 per share during the period from July 30, 2015 to September 29, 2015. The table below
sets forth the repurchases we made in the periods indicated.



|                                         |  |                                       |             |  |                                         |  |       |                                                                                   |  |  |                                                                          |  |  |  |             | 
|---------------------------------------- |  | ------------------------------------- | ----------- |  | --------------------------------------- |  | ----- | --------------------------------------------------------------------------------- |  |  | ------------------------------------------------------------------------ |  |  |  | ----------- | 
|Month                                    |  | Total Number ofCommon SharesPurchased |             |  | Average PricePaid per CommonShare (NT$) |  |       | Total Number ofCommon SharesPurchased as Partof PubliclyAnnounced Plansor Program |  |  | MaximumNumber of Sharesthat May Yet bePurchased Underthe Plans orProgram | 
|July 2015 (from July 30, 2015)           |  |                                       | 6,000,000   |  |                                         |  | 11.20 |                                                                                   |  |  | 6,000,000                                                                |  |  |  | 194,000,000 | 
|August 2015                              |  |                                       | 127,000,000 |  |                                         |  | 10.92 |                                                                                   |  |  | 133,000,000                                                              |  |  |  | 67,000,000  | 
|September 2015 (till September 15, 2015) |  |                                       | 67,000,000  |  |                                         |  | 11.17 |                                                                                   |  |  | 200,000,000                                                              |  |  |  |            | 



|ITEM 16F. | CHANGE IN REGISTRANTS CERTIFYING ACCOUNTANT
|--------- | --------------------------------------------

Not applicable.



|ITEM 16G. | CORPORATE GOVERNANCE
|--------- | --------------------

As a R.O.C. company listed on the New York Stock Exchange, or
NYSE, we are subject to the U.S. corporate governance rules to the extent that these rules are applicable to foreign private issuers. The following summary details the significant differences between our corporate governance practices and corporate
governance standards for U.S. companies (i.e. non-foreign private issuers) under the NYSE listing standards.

The Legal Framework.
In general, corporate governance principles for Taiwanese companies are set forth in the Company Act of the Republic of China, or the R.O.C. Company Act, the R.O.C. Securities Exchange Act and, to the extent they are listed on the Taiwan Stock
Exchange, under listing rules of the Taiwan Stock Exchange. Corporate governance principles under provisions of R.O.C. law may differ in significant ways to corporate governance standards for U.S. companies listed on the NYSE. Committed to high
standards of corporate governance, we have generally brought our corporate governance in line with U.S. regulations, including the formation of an audit committee. However, we have not adopted certain recommended NYSE corporate governance standards
where such standards are contrary to R.O.C. laws or regulations or generally prevailing business practices in Taiwan.



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Independent Board Members. Under the NYSE listing standards applicable to U.S. companies,
independent directors must comprise a majority of the board of directors. We currently have four independent directors out of a total of nine directors on our board of directors. Our standards for determining director independence substantially
comply with the NYSE listing standards, which include detailed tests for determining director independence. In addition, even though our independent directors meet in committee meetings of which they are committee members, we will not hold executive
sessions of non-management directors. Such requirement is contrary to the R.O.C. Company Act.

Board Committees. Under the NYSE
listing standards, companies are required to have a nominating/corporate governance committee, composed entirely of independent directors. In addition to identifying individuals qualified to become board members, the nominating/corporate committee
must develop and recommend to the board a set of corporate governance principles. We do not currently have a corporate governance committee or a nominating committee. In accordance with an interpretation letter issued under the R.O.C. Company Act,
the power to nominate directors shall not vest only in the directors. Any holder of the companys voting common stock may nominate directors to be voted on by stockholders. Therefore, we do not have a nominating committee because vesting such
nominating rights in a body of independent directors may result in conflict with the R.O.C. Company Act. Furthermore, we do not have a corporate governance committee, as such committee is not required under R.O.C. requirements. Our board of
directors is responsible for regularly reviewing our corporate governance standards and practices.

Under the NYSE listing standards,
companies are required to have a compensation committee, composed entirely of independent directors. Under the R.O.C. Company Act, however, companies incorporated in the R.O.C. are not required to have a compensation committee with the same
standards as the NYSE listing standards, but publicly listed companies in the R.O.C. must have a remuneration committee in accordance with the applicable laws and rules in the R.O.C. Since 2011, we have established a remuneration committee composed
of all the independent directors and convened meetings accordance with the applicable laws and rules in the R.O.C. The remuneration committee is responsible for determining the form and amount of compensation for each of our directors and executive
officers under our articles of incorporation and the remuneration committee charter. In addition to the compensation approved at the stockholders meeting, in the event we have net income in any fiscal year, we will distribute 0.1% of our
earnings after payment of all income taxes, deduction of any past losses and allocation of 10% of our net income for legal reserves, as remuneration to our directors pursuant to our articles of incorporation.

Equity Compensation Plans. The NYSE listing standards also require that a companys stockholders must approve equity compensation
plans. Under the corresponding requirements in the R.O.C. Company Act and the R.O.C. Securities Exchange Act, stockholders approval is required for the distribution of employee bonuses in the form of stock, while the board of directors has
authority, subject to the approval of the R.O.C. Securities and Futures Bureau, to approve employee stock option plans and to grant options to employees pursuant to such plans and also has authority to approve share buy-back programs for the purpose
of selling common shares so purchased to employees and the sale of such common shares to employees pursuant to such programs. We intend to follow only the R.O.C. requirements.



|ITEM 16H. | MINE SAFETY DISCLOSURE
|--------- | ----------------------

Not applicable.

PART III



|ITEM 17. | FINANCIAL STATEMENTS
|-------- | --------------------

Not applicable.



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|ITEM 18. | FINANCIAL STATEMENTS
|-------- | --------------------

The following is a list of the audited consolidated financial
statements and report of independent registered public accounting firm included in this annual report beginning on page F-1.



|                                                                                                      |  |      |      | 
|----------------------------------------------------------------------------------------------------- |  | ---- | ---- | 
|                                                                                                      |  | Page |     
|Consolidated Financial Statements of United Microelectronics Corporation and Subsidiaries             |  |      | F-1  | 
|Report of Independent Registered Public Accounting Firm                                               |  |      | F-2  | 
|Consolidated Balance Sheets as of December 31, 2014 and 2015                                          |  |      | F-3  | 
|Consolidated Statements of Comprehensive Income for the years ended December 31,
 2013, 2014 and 2015 |  |      | F-4  | 
|Consolidated Statements of Changes in Equity for the years ended December 31,
 2013, 2014 and 2015    |  |      | F-5  | 
|Consolidated Statements of Cash Flows for the years ended December 31, 2013, 2014
 and 2015           |  |      | F-8  | 
|Notes to the Consolidated Financial Statements                                                        |  |      | F-10 | 



|ITEM 19. | EXHIBITS
|-------- | --------



|              |  |                                                                                                                                                                                                                                                                            
|------------- |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|ExhibitNumber |  | Description of Exhibits                                                                                                                                                                                                                                                    
|              | 
|1.1           |  | Articles of Incorporation of the Company as last amended on June 15, 2011 (1)                                                                                                                                                                                              
|              | 
|2.1           |  | Form of Amendment No. 1 to Deposit Agreement among the Company, and Holders and Beneficial Owners of American Depositary Shares issued thereunder, including the form of American Depositary Shares (2)                                                                    
|              | 
|2.2           |  | Form of Amendment No. 2 to Deposit Agreement among the Company, and Holders and Beneficial Owners of American Depositary Shares issued thereunder, including the form of American Depositary Shares (3)                                                                    
|              | 
|4.1           |  | Lease Agreement with Hsinchu Science Park Administration in relation to government-owned land located at Hsinchu Science Park, Ko-Kuan Section, No. 20-22, Hsinchu, Taiwan, R.O.C., the site of Fab 6A (in Chinese with English summary
translation) (4)                   
|              | 
|4.2           |  | Lease Agreement with Hsinchu Science Park Administration in relation to government-owned land located at Hsinchu Science Park, third section of first phase, Hsinchu, Taiwan, R.O.C., the site of Fab 8A and United Tower (in Chinese
with English summary translation) (5)
|              | 
|4.3           |  | Lease Agreement with Hsinchu Science Park Administration in relation to government-owned land located at Hsinchu Science Park, third section of first phase, Hsinchu, Taiwan, R.O.C., the site of Fab 8C (in Chinese with English
summary translation) (6)                 
|              | 
|4.4           |  | Lease Agreement with Hsinchu Science Park Administration in relation to government-owned land located at Hsinchu Science Park, third section of first phase, Hsinchu, Taiwan, R.O.C., the site of Fab 8D (in Chinese with English
summary translation) (7)                 
|              | 
|4.5           |  | Lease Agreement with Hsinchu Science Park Administration in relation to government-owned land located at Hsinchu Science Park, third section of second phase, Hsinchu, Taiwan, R.O.C., the site of Fab 8E (in Chinese with English
summary translation) (8)                
|              | 
|4.6           |  | Lease Agreement with Hsinchu Science Park Administration in relation to government-owned land located at Hsinchu Science Park, Gin-Shan section, Hsinchu, Taiwan, R.O.C., the site of Fab 8F (in Chinese with English summary
translation) (9)                             
|              | 
|4.7           |  | Lease Agreement with Southern Taiwan Science Park Administration in relation to government-owned land located at Tainan Science Park, Tainan, Taiwan, R.O.C., the site of Fab 12A (in Chinese with English summary translation) (10)                                       
|              | 
|4.8           |  | Merger Agreement, entered into as of February 26, 2004, between United Microelectronics Corporation and SiS Microelectronics Corporation (English Translation)
(11)                                                                                                        



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|              |  |                                                                                                                                                                                                                                               
|------------- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|ExhibitNumber |  | Description of Exhibits                                                                                                                                                                                                                       
|              | 
|4.9           |  | Lease Agreement with Hsinchu Science Park Administration in relation to government-owned land located at Hsinchu Science Park, Ko-Kuan section, Hsinchu, Taiwan, R.O.C., the site of Fab 8S (in Chinese with English summary
translation) (12)
|              | 
|4.10          |  | Lease Agreement with JTC Corporation in relation to land located at Pasir Ris Wafer Fab Park, Singapore, the site of Fab12i (summary) (13)                                                                                                    
|              | 
|4.11          |  | Merger Agreement, entered into as of April 29, 2009, among United Microelectronics Corporation, Infoshine Technology Limited and Best Elite International Limited (14)                                                                        
|              | 
|*8.1          |  | List of Significant Subsidiaries of United Microelectronics Corporation                                                                                                                                                                       
|              | 
|11.1          |  | Code of Ethics for Directors and Officers (15)                                                                                                                                                                                                
|              | 
|11.2          |  | Employee Code of Conduct (16)                                                                                                                                                                                                                 
|              | 
|*12.1         |  | Certification of our Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002                                                                                                                                        
|              | 
|*12.2         |  | Certification of our Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002                                                                                                                                        
|              | 
|*13.1         |  | Certification of our Chief Executive Officer pursuant to 18 U.S.C.§ 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002                                                                                                
|              | 
|*13.2         |  | Certification of our Chief Financial Officer pursuant to 18 U.S.C.§ 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002                                                                                                
|              | 
|*15.1         |  | Consent of Independent Registered Public Accounting Firm                                                                                                                                                                                      



|* | Filed herewith.
|- | ---------------

|(1) | Incorporated by reference to Exhibit 1.1 to Registrants Annual Report on Form 20-F for the fiscal year ended December 31, 2013 (File No. 001-15128) filed with the Commission on April 18, 2014.
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(2) | Incorporated by reference to Exhibit (a) to the Registrants Registration Statement on Form F-6 (File No. 333-13796) filed with the Commission on March 2, 2006.
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------

|(3) | Incorporated by reference to Exhibit (a) (iii) to the Registrants Registration Statement on Form F-6 (File No. 333-98591) filed with the Commission on March 19, 2007.
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(4) | Incorporated by reference to Exhibit 4.1 to Registrants Annual Report on Form 20-F for the fiscal year ended December 31, 2006 (File No. 001-15128) filed with the Commission on May 9, 2007.
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(5) | Incorporated by reference to Exhibit 10.7 to the Registrants Registration Statement on Form F-1 (File No. 333-12444) filed with the Commission on August 28, 2000, as amended.
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(6) | Incorporated by reference to Exhibit 10.8 to the Registrants Registration Statement on Form F-1 (File No. 333-12444) filed with the Commission on August 28, 2000, as amended.
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(7) | Incorporated by reference to Exhibit 10.9 to the Registrants Registration Statement on Form F-1 (File No. 333-12444) filed with the Commission on August 28, 2000, as amended.
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(8) | Incorporated by reference to Exhibit 10.10 to the Registrants Registration Statement on Form F-1 (File No. 333-12444) filed with the Commission on August 28, 2000, as amended.
|--- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(9) | Incorporated by reference to Exhibit 10.11 to the Registrants Registration Statement on F-1 (File No. 333-12444) filed with the Commission on August 28, 2000, as amended.
|--- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(10) | Incorporated by reference to Exhibit 10.12 to the Registrants Registration Statement on F-1 (File No. 333-12444) filed with the Commission on August 28, 2000, as amended.
|---- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(11) | Incorporated by reference to Exhibit 4.8 to the Registrants Annual Report on Form 20-F for the fiscal year ended December 31, 2003 (File No. 1-15128) filed with the Commission on June 17, 2004.
|---- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(12) | Incorporated by reference to Exhibit 4.9 to Registrants Annual Report on Form 20-F for the fiscal year ended December 31, 2006 (File No. 001-15128) filed with the Commission on May 9, 2007.
|---- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(13) | Incorporated by reference to Exhibit 4.10 to Registrants Annual Report on Form 20-F for the fiscal year ended December 31, 2006 (File No. 001-15128) filed with the Commission on May 9, 2007.
|---- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(14) | Incorporated by reference to Exhibit 99.1 to the Form 6-K furnished to the Commission on May 8, 2009.
|---- | -----------------------------------------------------------------------------------------------------

|(15) | Incorporated by reference to Exhibit 99.1 to the Form 6-K furnished to the Commission on May 25, 2005.
|---- | ------------------------------------------------------------------------------------------------------

|(16) | Incorporated by reference to Exhibit 99.2 to the Form 6-K furnished to the Commission on March 26, 2006.
|---- | --------------------------------------------------------------------------------------------------------



96



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##### Table of Contents

SIGNATURES

The registrant hereby certifies that it meets all of the requirements for filing on Form 20-F and that it has duly caused and authorized the
undersigned to sign this annual report on its behalf.



|                                    |  |                 |  |                        
|----------------------------------- |  | --------------- |  | -----------------------
|UNITED MICROELECTRONICS CORPORATION
|                                    | 
|By:                                 |  | /s/ CHITUNG LIU
|                                    |  | Name:           |  | Chitung Liu            
|                                    |  | Title:          |  | Chief Financial Officer
|                                   
|Date: April 18, 2016               



---

##### Table of Contents

United Microelectronics Corporation and Subsidiaries

Consolidated Financial Statements for years ended December 31, 2013, 2014 and 2015

Together with Report of Independent Registered Public Accounting Firm



F-1



---

##### Table of Contents

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Stockholders of United Microelectronics Corporation

We have audited the accompanying consolidated balance sheets of United Microelectronics Corporation and subsidiaries (the Company) as of December
31, 2014 and 2015, the related consolidated statements of comprehensive income, changes in equity, and cash flows for each of the three years ended December 31, 2015. These consolidated financial statements are the responsibility of the
Companys management. Our responsibility is to express an opinion on these consolidated financial statements based on our audits.

We conducted our
audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of
material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In
our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the consolidated financial position of United Microelectronics Corporation and subsidiaries at December 31, 2014, and December 31, 2015,
and the consolidated results of their operations and their cash flows for each of the three years ended December 31, 2015, in conformity with International Financial Reporting Standards as issued by the International Accounting Standards Board.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), United Microelectronics Corporation
and subsidiaries internal control over financial reporting as of December 31, 2015, based on criteria established in Internal Control  Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission
(2013 framework) and our report dated April 18, 2016 expressed an unqualified opinion thereon.

/s/ Ernst & Young

Taipei, Taiwan

Republic of China

April 18, 2016



F-2



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##### Table of Contents

UNITED MICROELECTRONICS CORPORATION AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

As of
December 31, 2014 and 2015

(Expressed in Thousands, Except for Par Value)



|                                                                      |  |                       |  |                    |             |   |      |  |             |     |  |  |            |  
|--------------------------------------------------------------------- |  | --------------------- |  | ------------------ | ----------- | - | ---- |  | ----------- | --- |  |  | ---------- | -
|                                                                      |  |                       |  | As of December 31, |            
|                                                                      |  | Notes                 |  | 2014               |             |   | 2015 | 
|                                                                      |  |                       |  | NT$                |             |   | NT$  |  |             | US$ | 
|Assets                                                                |  |                       |  |                    |             |   |      |  |             |     |  |  |            |  
|Current assets                                                        |  |                       |  |                    |             |   |      |  |             |     |  |  |            |  
|Cash and cash equivalents                                             |  | 4, 6(1)               |  |                    | 45,701,335  |   |      |  | 53,290,433  |     |  |  | 1,625,204  |  
|Financial assets at fair value through profit or loss, current        |  | 4, 5, 6(2), 11(7)     |  |                    | 740,129     |   |      |  | 664,918     |     |  |  | 20,278     |  
|Notes receivable                                                      |  | 4                     |  |                    | 126,141     |   |      |  | 58,588      |     |  |  | 1,787      |  
|Accounts receivable, net                                              |  | 4, 6(3)               |  |                    | 22,207,271  |   |      |  | 19,059,774  |     |  |  | 581,268    |  
|Accounts receivable-related parties, net                              |  | 4, 7                  |  |                    | 36,022      |   |      |  | 213,460     |     |  |  | 6,510      |  
|Other receivables                                                     |  | 4                     |  |                    | 658,409     |   |      |  | 632,885     |     |  |  | 19,301     |  
|Current tax assets                                                    |  | 4                     |  |                    | 34,480      |   |      |  | 24,335      |     |  |  | 742        |  
|Inventories, net                                                      |  | 4, 5, 6(4)            |  |                    | 15,242,232  |   |      |  | 17,641,385  |     |  |  | 538,011    |  
|Prepayments                                                           |  |                       |  |                    | 2,003,269   |   |      |  | 2,164,296   |     |  |  | 66,005     |  
|Non-current assets held for sale                                      |  | 4, 6(25)              |  |                    | 6,978,991   |   |      |  |            |     |  |  |           |  
|Other current assets                                                  |  |                       |  |                    | 3,134,870   |   |      |  | 1,066,447   |     |  |  | 32,523     |  
|                                                                      |  |                       |  |                    |             |   |      |  |             |     |  |  |            |  
|Total current assets                                                  |  |                       |  |                    | 96,863,149  |   |      |  | 94,816,521  |     |  |  | 2,891,629  |  
|                                                                      |  |                       |  |                    |             |   |      |  |             |     |  |  |            |  
|                                                                      |  |                       |  |                   
|Non-current assets                                                    |  |                       |  |                    |             |   |      |  |             |     |  |  |            |  
|Financial assets at fair value through profit or loss, noncurrent     |  | 4, 5, 6(2), 11(7)     |  |                    | 45,232      |   |      |  | 81,933      |     |  |  | 2,499      |  
|Available-for-sale financial assets, noncurrent                       |  | 4, 5, 6(5), 7, 11(7)  |  |                    | 24,362,104  |   |      |  | 23,800,686  |     |  |  | 725,852    |  
|Financial assets measured at cost, noncurrent                         |  | 4, 6(6)               |  |                    | 3,833,006   |   |      |  | 3,888,309   |     |  |  | 118,582    |  
|Investments accounted for under the equity method                     |  | 4, 6(7)               |  |                    | 6,617,270   |   |      |  | 10,339,035  |     |  |  | 315,311    |  
|Property, plant and equipment                                         |  | 4, 5, 6(8), 8         |  |                    | 166,690,243 |   |      |  | 186,433,395 |     |  |  | 5,685,678  |  
|Intangible assets                                                     |  | 4, 6(9), 7            |  |                    | 4,532,938   |   |      |  | 4,504,088   |     |  |  | 137,362    |  
|Deferred tax assets                                                   |  | 4, 5, 6(22)           |  |                    | 2,267,138   |   |      |  | 2,323,242   |     |  |  | 70,852     |  
|Prepayment for equipment                                              |  |                       |  |                    | 1,063,353   |   |      |  | 2,333,981   |     |  |  | 71,180     |  
|Refundable deposits                                                   |  | 8                     |  |                    | 1,145,843   |   |      |  | 2,638,788   |     |  |  | 80,475     |  
|Other noncurrent assets                                               |  |                       |  |                    | 3,227,257   |   |      |  | 4,194,315   |     |  |  | 127,914    |  
|                                                                      |  |                       |  |                    |             |   |      |  |             |     |  |  |            |  
|Total non-current assets                                              |  |                       |  |                    | 213,784,384 |   |      |  | 240,537,772 |     |  |  | 7,335,705  |  
|                                                                      |  |                       |  |                    |             |   |      |  |             |     |  |  |            |  
|Total assets                                                          |  |                       |  |                    | 310,647,533 |   |      |  | 335,354,293 |     |  |  | 10,227,334 |  
|                                                                      |  |                       |  |                    |             |   |      |  |             |     |  |  |            |  
|                                                                      |  |                       |  |                   
|Liabilities and Equity                                                |  |                       |  |                    |             |   |      |  |             |     |  |  |            |  
|Current liabilities                                                   |  |                       |  |                    |             |   |      |  |             |     |  |  |            |  
|Short-term loans                                                      |  | 6(10), 8              |  |                    | 6,250,754   |   |      |  | 5,505,049   |     |  |  | 167,888    |  
|Financial liabilities at fair value through profit or loss, current   |  | 4, 5, 6(11), 11(7)    |  |                    | 42,354      |   |      |  | 999         |     |  |  | 30         |  
|Notes and accounts payable                                            |  |                       |  |                    | 6,167,339   |   |      |  | 5,954,249   |     |  |  | 181,587    |  
|Other payables                                                        |  |                       |  |                    | 12,421,152  |   |      |  | 12,522,765  |     |  |  | 381,908    |  
|Payables on equipment                                                 |  |                       |  |                    | 10,478,714  |   |      |  | 14,657,626  |     |  |  | 447,015    |  
|Current tax liabilities                                               |  | 4                     |  |                    | 3,633,154   |   |      |  | 3,236,577   |     |  |  | 98,706     |  
|Liabilities directly associated with non-current assets held for sale |  | 4, 6(25)              |  |                    | 5,594,850   |   |      |  |            |     |  |  |           |  
|Current portion of long-term liabilities                              |  | 6(13)                 |  |                    | 3,774,986   |   |      |  | 6,601,721   |     |  |  | 201,333    |  
|Other current liabilities                                             |  |                       |  |                    | 835,239     |   |      |  | 1,007,103   |     |  |  | 30,714     |  
|                                                                      |  |                       |  |                    |             |   |      |  |             |     |  |  |            |  
|Total current liabilities                                             |  |                       |  |                    | 49,198,542  |   |      |  | 49,486,089  |     |  |  | 1,509,181  |  
|                                                                      |  |                       |  |                    |             |   |      |  |             |     |  |  |            |  
|                                                                      |  |                       |  |                   
|Non-current liabilities                                               |  |                       |  |                    |             |   |      |  |             |     |  |  |            |  
|Bonds payable                                                         |  | 4, 6(12)              |  |                    | 24,977,820  |   |      |  | 41,636,670  |     |  |  | 1,269,798  |  
|Long-term loans                                                       |  | 6(13), 8              |  |                    | 8,423,470   |   |      |  | 5,887,737   |     |  |  | 179,559    |  
|Deferred tax liabilities                                              |  | 4, 5, 6(22)           |  |                    | 3,140,251   |   |      |  | 2,386,100   |     |  |  | 72,769     |  
|Net defined benefit liabilities, noncurrent                           |  | 4, 5, 6(14)           |  |                    | 3,825,490   |   |      |  | 3,890,801   |     |  |  | 118,658    |  
|Guarantee deposits                                                    |  |                       |  |                    | 451,906     |   |      |  | 509,708     |     |  |  | 15,545     |  
|Other noncurrent liabilities                                          |  | 9(4)                  |  |                    | 291,021     |   |      |  | 6,704,541   |     |  |  | 204,469    |  
|                                                                      |  |                       |  |                    |             |   |      |  |             |     |  |  |            |  
|Total non-current liabilities                                         |  |                       |  |                    | 41,109,958  |   |      |  | 61,015,557  |     |  |  | 1,860,798  |  
|                                                                      |  |                       |  |                    |             |   |      |  |             |     |  |  |            |  
|Total liabilities                                                     |  |                       |  |                    | 90,308,500  |   |      |  | 110,501,646 |     |  |  | 3,369,979  |  
|                                                                      |  |                       |  |                    |             |   |      |  |             |     |  |  |            |  
|Commitments and contingencies                                         |  | 9                     |  |                    |             |   |      |  |             |     |  |  |            |  
|                                                                      |  |                       |  |                   
|Equity attributable to the parent company                             |  |                       |  |                    |             |   |      |  |             |     |  |  |            |  
|Capital                                                               |  | 4, 6(15), 6(16)       |  |                    |             |   |      |  |             |     |  |  |            |  
|Common stock - NT$10 par value                                        |  |                       |  |                    | 127,252,078 |   |      |  | 127,581,329 |     |  |  | 3,890,861  |  
|Authorized: 26,000,000 thousand shares                                |  |                       |  |                    |             |   |      |  |             |     |  |  |            |  
|Issued: 12,725,208 thousand shares as of December 31, 2014            |  |                       |  |                    |             |   |      |  |             |     |  |  |            |  
|Issued: 12,758,133 thousand shares as of December 31, 2015            |  |                       |  |                    |             |   |      |  |             |     |  |  |            |  
|Capital collected in advance                                          |  |                       |  |                    | 50,970      |   |      |  |            |     |  |  |           |  
|Additional paid-in capital                                            |  | 4, 6(12), 6(15),6(16) |  |                    |             |   |      |  |             |     |  |  |            |  
|Premiums                                                              |  |                       |  |                    | 37,145,022  |   |      |  | 37,253,121  |     |  |  | 1,136,112  |  
|Treasury stock transactions                                           |  |                       |  |                    | 1,827,713   |   |      |  | 2,151,275   |     |  |  | 65,608     |  
|Transactions with noncontrolling interests                            |  |                       |  |                    | 343,821     |   |      |  | 697,630     |     |  |  | 21,275     |  
|Employee stock options                                                |  |                       |  |                    | 165,837     |   |      |  |            |     |  |  |           |  
|Stock options - conversion right                                      |  |                       |  |                    |            |   |      |  | 1,572,121   |     |  |  | 47,945     |  
|Other                                                                 |  |                       |  |                    | 440,932     |   |      |  | 501,486     |     |  |  | 15,294     |  
|Retained earnings                                                     |  | 6(15)                 |  |                    |             |   |      |  |             |     |  |  |            |  
|Legal reserve                                                         |  |                       |  |                    | 6,511,844   |   |      |  | 7,725,978   |     |  |  | 235,620    |  
|Unappropriated earnings                                               |  |                       |  |                    | 42,660,570  |   |      |  | 47,620,502  |     |  |  | 1,452,288  |  
|Other components of equity                                            |  | 4                     |  |                    |             |   |      |  |             |     |  |  |            |  
|Exchange differences on translation of foreign operations             |  |                       |  |                    | (879,026    | ) |      |  | 1,989,302   |     |  |  | 60,668     |  
|                                                                      |  |                       |  |                   
|Unrealized gain or loss on available-for-sale financial assets        |  |                       |  |                    | 10,986,762  |   |      |  | 7,151,151   |     |  |  | 218,089    |  
|                                                                      |  |                       |  |                   
|Treasury stock                                                        |  | 4, 6(15)              |  |                    | (10,017,288 | ) |      |  | (11,418,313 | )   |  |  | (348,225   | )
|                                                                      |  |                       |  |                    |             |   |      |  |             |     |  |  |            |  
|Total equity attributable to the parent company                       |  |                       |  |                    | 216,489,235 |   |      |  | 222,825,582 |     |  |  | 6,795,535  |  
|                                                                      |  |                       |  |                    |             |   |      |  |             |     |  |  |            |  
|                                                                      |  |                       |  |                   
|Non-controlling interests                                             |  | 6(15)                 |  |                    | 3,849,798   |   |      |  | 2,027,065   |     |  |  | 61,820     |  
|                                                                      |  |                       |  |                    |             |   |      |  |             |     |  |  |            |  
|Total equity                                                          |  |                       |  |                    | 220,339,033 |   |      |  | 224,852,647 |     |  |  | 6,857,355  |  
|                                                                      |  |                       |  |                    |             |   |      |  |             |     |  |  |            |  
|                                                                      |  |                       |  |                   
|Total liabilities and equity                                          |  |                       |  |                    | 310,647,533 |   |      |  | 335,354,293 |     |  |  | 10,227,334 |  
|                                                                      |  |                       |  |                    |             |   |      |  |             |     |  |  |            |  

The accompanying notes are an integral part of the consolidated financial statements.



F-3



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##### Table of Contents

UNITED MICROELECTRONICS CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

For the years ended December 31, 2013, 2014 and 2015

(Expressed in Thousands, Except for Earnings per Share)



|                                                                                  |  |                                 |  |                                  |              |   |      |  |              |      |  |  |              |   |  |  |            |  
|--------------------------------------------------------------------------------- |  | ------------------------------- |  | -------------------------------- | ------------ | - | ---- |  | ------------ | ---- |  |  | ------------ | - |  |  | ---------- | -
|                                                                                  |  |                                 |  | For the years ended December 31, |             
|                                                                                  |  | Notes                           |  | 2013                             |              |   | 2014 |  |              | 2015 | 
|                                                                                  |  |                                 |  | NT$                              |              |   | NT$  |  |              | NT$  |  |  | US$          |  
|Net operating revenues                                                            |  | 4, 6(17) 7, 12                  |  |                                  | 123,811,636  |   |      |  | 140,012,076  |      |  |  | 144,830,421  |   |  |  | 4,416,908  |  
|Operating costs                                                                   |  | 4, 6(4), 6(14),6(16), 6(18), 12 |  |                                  | (100,248,661 | ) |      |  | (108,159,398 | )    |  |  | (113,061,894 | ) |  |  | (3,448,061 | )
|                                                                                  |  |                                 |  |                                  |              |   |      |  |              |      |  |  |              |   |  |  |            |  
|Gross profit                                                                      |  |                                 |  |                                  | 23,562,975   |   |      |  | 31,852,678   |      |  |  | 31,768,527   |   |  |  | 968,847    |  
|                                                                                  |  |                                 |  |                                  |              |   |      |  |              |      |  |  |              |   |  |  |            |  
|Operating expenses                                                                |  | 4, 6(14), 6(16)6(18), 7, 12     |  |                                  |              |   |      |  |              |      |  |  |              |   |  |  |            |  
|Sales and marketing expenses                                                      |  |                                 |  |                                  | (3,247,000   | ) |      |  | (4,011,478   | )    |  |  | (4,064,053   | ) |  |  | (123,942   | )
|General and administrative expenses                                               |  |                                 |  |                                  | (3,665,472   | ) |      |  | (3,562,029   | )    |  |  | (3,730,259   | ) |  |  | (113,762   | )
|Research and development expenses                                                 |  |                                 |  |                                  | (12,493,051  | ) |      |  | (13,663,874  | )    |  |  | (12,174,824  | ) |  |  | (371,297   | )
|                                                                                  |  |                                 |  |                                  |              |   |      |  |              |      |  |  |              |   |  |  |            |  
|Subtotal                                                                          |  |                                 |  |                                  | (19,405,523  | ) |      |  | (21,237,381  | )    |  |  | (19,969,136  | ) |  |  | (609,001   | )
|                                                                                  |  |                                 |  |                                  |              |   |      |  |              |      |  |  |              |   |  |  |            |  
|Net other operating income and expenses                                           |  | 4, 6(19)                        |  |                                  | (125,332     | ) |      |  | (538,965     | )    |  |  | (963,734     | ) |  |  | (29,391    | )
|                                                                                  |  |                                 |  |                                  |              |   |      |  |              |      |  |  |              |   |  |  |            |  
|Operating income                                                                  |  |                                 |  |                                  | 4,032,120    |   |      |  | 10,076,332   |      |  |  | 10,835,657   |   |  |  | 330,455    |  
|                                                                                  |  |                                 |  |                                  |              |   |      |  |              |      |  |  |              |   |  |  |            |  
|Non-operating income and expenses                                                 |  |                                 |  |                                  |              |   |      |  |              |      |  |  |              |   |  |  |            |  
|Other income                                                                      |  | 4, 6(20)                        |  |                                  | 1,091,309    |   |      |  | 1,202,449    |      |  |  | 1,048,942    |   |  |  | 31,990     |  
|Other gains and losses                                                            |  | 4, 6(20), 6(25), 12             |  |                                  | 1,851,210    |   |      |  | 2,669,133    |      |  |  | 1,933,859    |   |  |  | 58,977     |  
|Finance costs                                                                     |  | 6(8), 6(20)                     |  |                                  | (678,406     | ) |      |  | (746,065     | )    |  |  | (523,865     | ) |  |  | (15,976    | )
|Share of profit or loss of associates and joint ventures                          |  | 4, 6(7), 12                     |  |                                  | 697,931      |   |      |  | 37,179       |      |  |  | 4,694        |   |  |  | 143        |  
|Bargain purchase gain                                                             |  | 4, 6(24)                        |  |                                  | 7,153,529    |   |      |  |             |      |  |  |             |   |  |  |           |  
|Exchange gain, net                                                                |  | 4, 11                           |  |                                  | 192,779      |   |      |  | 333,275      |      |  |  | 369,311      |   |  |  | 11,263     |  
|                                                                                  |  |                                 |  |                                  |              |   |      |  |              |      |  |  |              |   |  |  |            |  
|Subtotal                                                                          |  |                                 |  |                                  | 10,308,352   |   |      |  | 3,495,971    |      |  |  | 2,832,941    |   |  |  | 86,397     |  
|                                                                                  |  |                                 |  |                                  |              |   |      |  |              |      |  |  |              |   |  |  |            |  
|Income from continuing operations before income tax                               |  |                                 |  |                                  | 14,340,472   |   |      |  | 13,572,303   |      |  |  | 13,668,598   |   |  |  | 416,852    |  
|Income tax expense                                                                |  | 4, 5, 6(22), 12                 |  |                                  | (2,256,834   | ) |      |  | (3,125,115   | )    |  |  | (1,027,500   | ) |  |  | (31,336    | )
|                                                                                  |  |                                 |  |                                  |              |   |      |  |              |      |  |  |              |   |  |  |            |  
|Net income                                                                        |  |                                 |  |                                  | 12,083,638   |   |      |  | 10,447,188   |      |  |  | 12,641,098   |   |  |  | 385,516    |  
|                                                                                  |  |                                 |  |                                  |              |   |      |  |              |      |  |  |              |   |  |  |            |  
|Other comprehensive income (loss)                                                 |  | 6(21)                           |  |                                  |              |   |      |  |              |      |  |  |              |   |  |  |            |  
|Items that will not be reclassified subsequently to profit or loss                |  |                                 |  |                                  |              |   |      |  |              |      |  |  |              |   |  |  |            |  
|Remeasurements of defined benefit pension plans                                   |  | 6(14)                           |  |                                  | 456,478      |   |      |  | (2,607       | )    |  |  | (40,200      | ) |  |  | (1,226     | )
|Share of remeasurements of defined benefit plans of associates and joint ventures |  |                                 |  |                                  |             |   |      |  |             |      |  |  | (1,831       | ) |  |  | (56        | )
|Income tax effect                                                                 |  | 4, 5, 6(22)                     |  |                                  | (77,623      | ) |      |  | 521          |      |  |  | 6,809        |   |  |  | 208        |  
|                                                                                  |  |                                 |  |                                  |              |   |      |  |              |      |  |  |              |   |  |  |            |  
|Subtotal                                                                          |  |                                 |  |                                  | 378,855      |   |      |  | (2,086       | )    |  |  | (35,222      | ) |  |  | (1,074     | )
|                                                                                  |  |                                 |  |                                  |              |   |      |  |              |      |  |  |              |   |  |  |            |  
|Items that may be reclassified subsequently to profit or loss                     |  |                                 |  |                                  |              |   |      |  |              |      |  |  |              |   |  |  |            |  
|Exchange differences on translation of foreign operations                         |  |                                 |  |                                  | (154,613     | ) |      |  | 4,289,391    |      |  |  | 2,784,800    |   |  |  | 84,928     |  
|Unrealized gain (loss) on available-for-sale financial assets                     |  |                                 |  |                                  | (856,326     | ) |      |  | 1,652,163    |      |  |  | (3,760,207   | ) |  |  | (114,675   | )
|Share of other comprehensive income (loss) of associates and joint ventures       |  | 4, 6(7)                         |  |                                  | 362,491      |   |      |  | 312,088      |      |  |  | (276,327     | ) |  |  | (8,427     | )
|Income tax effect                                                                 |  | 4, 5, 6(22)                     |  |                                  | 468,000      |   |      |  | (182,264     | )    |  |  | 222,327      |   |  |  | 6,780      |  
|                                                                                  |  |                                 |  |                                  |              |   |      |  |              |      |  |  |              |   |  |  |            |  
|Subtotal                                                                          |  |                                 |  |                                  | (180,448     | ) |      |  | 6,071,378    |      |  |  | (1,029,407   | ) |  |  | (31,394    | )
|                                                                                  |  |                                 |  |                                  |              |   |      |  |              |      |  |  |              |   |  |  |            |  
|Total other comprehensive income (loss), net of tax                               |  |                                 |  |                                  | 198,407      |   |      |  | 6,069,292    |      |  |  | (1,064,629   | ) |  |  | (32,468    | )
|                                                                                  |  |                                 |  |                                  |              |   |      |  |              |      |  |  |              |   |  |  |            |  
|                                                                                  |  |                                 |  |                                  |             
|Total comprehensive income                                                        |  |                                 |  |                                  | 12,282,045   |   |      |  | 16,516,480   |      |  |  | 11,576,469   |   |  |  | 353,048    |  
|                                                                                  |  |                                 |  |                                  |              |   |      |  |              |      |  |  |              |   |  |  |            |  
|                                                                                  |  |                                 |  |                                  |             
|Net income attributable to:                                                       |  |                                 |  |                                  |              |   |      |  |              |      |  |  |              |   |  |  |            |  
|Stockholders of the parent                                                        |  |                                 |  |                                  | 12,608,881   |   |      |  | 11,108,940   |      |  |  | 13,254,071   |   |  |  | 404,211    |  
|Non-controlling interests                                                         |  |                                 |  |                                  | (525,243     | ) |      |  | (661,752     | )    |  |  | (612,973     | ) |  |  | (18,695    | )
|                                                                                  |  |                                 |  |                                  |              |   |      |  |              |      |  |  |              |   |  |  |            |  
|                                                                                  |  |                                 |  |                                  | 12,083,638   |   |      |  | 10,447,188   |      |  |  | 12,641,098   |   |  |  | 385,516    |  
|                                                                                  |  |                                 |  |                                  |              |   |      |  |              |      |  |  |              |   |  |  |            |  
|                                                                                  |  |                                 |  |                                  |             
|Total comprehensive income attributable to:                                       |  |                                 |  |                                  |              |   |      |  |              |      |  |  |              |   |  |  |            |  
|Stockholders of the parent                                                        |  |                                 |  |                                  | 12,796,068   |   |      |  | 17,035,241   |      |  |  | 12,251,556   |   |  |  | 373,637    |  
|Non-controlling interests                                                         |  |                                 |  |                                  | (514,023     | ) |      |  | (518,761     | )    |  |  | (675,087     | ) |  |  | (20,589    | )
|                                                                                  |  |                                 |  |                                  |              |   |      |  |              |      |  |  |              |   |  |  |            |  
|                                                                                  |  |                                 |  |                                  | 12,282,045   |   |      |  | 16,516,480   |      |  |  | 11,576,469   |   |  |  | 353,048    |  
|                                                                                  |  |                                 |  |                                  |              |   |      |  |              |      |  |  |              |   |  |  |            |  
|Earnings per share (NTD)                                                          |  | 4, 6(23)                        |  |                                  |              |   |      |  |              |      |  |  |              |   |  |  |            |  
|Earnings per share-basic                                                          |  |                                 |  |                                  | 1.02         |   |      |  | 0.90         |      |  |  | 1.07         |   |  |  | 0.03       |  
|                                                                                  |  |                                 |  |                                  |              |   |      |  |              |      |  |  |              |   |  |  |            |  
|Earnings per share-diluted                                                        |  |                                 |  |                                  | 0.96         |   |      |  | 0.89         |      |  |  | 1.02         |   |  |  | 0.03       |  
|                                                                                  |  |                                 |  |                                  |              |   |      |  |              |      |  |  |              |   |  |  |            |  

The accompanying notes are an integral part of the consolidated financial statements.



F-4



---

##### Table of Contents

UNITED MICROELECTRONICS CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY

For the year ended December 31, 2013

(Expressed in Thousands)



|                                                                                                  |  |                                           |             |   |                    |  |        |                          |  |  |                            |   |  |                        |           |  |                                                      |  |            |                                                           |  |  |               |   |  |       |            |   |                          |  |             |             |  |  |             |   |  |  |           |   |  |  |             |  
|------------------------------------------------------------------------------------------------- |  | ----------------------------------------- | ----------- | - | ------------------ |  | ------ | ------------------------ |  |  | -------------------------- | - |  | ---------------------- | --------- |  | ---------------------------------------------------- |  | ---------- | --------------------------------------------------------- |  |  | ------------- | - |  | ----- | ---------- | - | ------------------------ |  | ----------- | ----------- |  |  | ----------- | - |  |  | --------- | - |  |  | ----------- | -
|                                                                                                  |  | Equity Attributable to the Parent Company |             |   |                    |  |        |                          | 
|                                                                                                  |  | Capital                                   |             |   |                    |  |        | Retained Earnings        |  |  | Other Components of Equity |   |  |                        |           |  |                                                      |  |            |                                                           |  |  |               |  
|                                                                                                  |  | CommonStock                               |             |   | CollectedinAdvance |  |        | AdditionalPaid-inCapital |  |  | LegalReserve               |   |  | UnappropriatedEarnings |           |  | ExchangeDifferencesonTranslationof ForeignOperations |  |            | UnrealizedGain orLoss onAvailable-for-SaleFinancialAssets |  |  | TreasuryStock |   |  | Total |            |   | Non-controllingInterests |  |             | TotalEquity | 
|                                                                                                  |  | NT$                                       |             |   | NT$                |  |        | NT$                      |  |  | NT$                        |   |  | NT$                    |           |  | NT$                                                  |  |            | NT$                                                       |  |  | NT$           |   |  | NT$   |            |   | NT$                      |  |             | NT$         | 
|Balance as of January 1, 2013                                                                     |  |                                           | 129,518,055 |   |                    |  | 3,038  |                          |  |  | 47,337,923                 |   |  |                        | 4,476,570 |  |                                                      |  | 25,900,780 |                                                           |  |  | (5,680,855    | ) |  |       | 10,051,872 |   |                          |  | (12,491,225 | )           |  |  | 199,116,158 |   |  |  | 2,571,139 |   |  |  | 201,687,297 |  
|Appropriation and distribution of 2012 retained earnings                                          |  |                                           |             |   |                    |  |        |                          |  |  |                            |   |  |                        |           |  |                                                      |  |            |                                                           |  |  |               |   |  |       |            |   |                          |  |             |             |  |  |             |   |  |  |           |   |  |  |             |  
|Legal reserve                                                                                     |  |                                           |            |   |                    |  |       |                          |  |  |                           |   |  |                        | 772,254   |  |                                                      |  | (772,254   | )                                                         |  |  |              |   |  |       |           |   |                          |  |            |             |  |  |            |   |  |  |          |   |  |  |            |  
|Cash dividends                                                                                    |  |                                           |            |   |                    |  |       |                          |  |  |                           |   |  |                        |          |  |                                                      |  | (5,061,310 | )                                                         |  |  |              |   |  |       |           |   |                          |  |            |             |  |  | (5,061,310  | ) |  |  |          |   |  |  | (5,061,310  | )
|Net income for the year ended December 31, 2013                                                   |  |                                           |            |   |                    |  |       |                          |  |  |                           |   |  |                        |          |  |                                                      |  | 12,608,881 |                                                           |  |  |              |   |  |       |           |   |                          |  |            |             |  |  | 12,608,881  |   |  |  | (525,243  | ) |  |  | 12,083,638  |  
|Other comprehensive income (loss), net of tax for the year ended December 31, 2013                |  |                                           |            |   |                    |  |       |                          |  |  |                           |   |  |                        |          |  |                                                      |  | 378,855    |                                                           |  |  | 436,883       |   |  |       | (628,551   | ) |                          |  |            |             |  |  | 187,187     |   |  |  | 11,220    |   |  |  | 198,407     |  
|                                                                                                  |  |                                           |             |   |                    |  |        |                          |  |  |                            |   |  |                        |           |  |                                                      |  |            |                                                           |  |  |               |   |  |       |            |   |                          |  |             |             |  |  |             |   |  |  |           |   |  |  |             |  
|Total comprehensive income (loss)                                                                 |  |                                           |            |   |                    |  |       |                          |  |  |                           |   |  |                        |          |  |                                                      |  | 12,987,736 |                                                           |  |  | 436,883       |   |  |       | (628,551   | ) |                          |  |            |             |  |  | 12,796,068  |   |  |  | (514,023  | ) |  |  | 12,282,045  |  
|                                                                                                  |  |                                           |             |   |                    |  |        |                          |  |  |                            |   |  |                        |           |  |                                                      |  |            |                                                           |  |  |               |   |  |       |            |   |                          |  |             |             |  |  |             |   |  |  |           |   |  |  |             |  
|Share-based payment transaction                                                                   |  |                                           | 402,762     |   |                    |  | 22,644 |                          |  |  | 46,073                     |   |  |                        |          |  |                                                      |  |           |                                                           |  |  |              |   |  |       |           |   |                          |  |            |             |  |  | 471,479     |   |  |  |          |   |  |  | 471,479     |  
|Convertible bonds repurchased                                                                     |  |                                           |            |   |                    |  |       |                          |  |  | (57,954                    | ) |  |                        |          |  |                                                      |  |           |                                                           |  |  |              |   |  |       |           |   |                          |  |            |             |  |  | (57,954     | ) |  |  |          |   |  |  | (57,954     | )
|Treasury stock acquired                                                                           |  |                                           |            |   |                    |  |       |                          |  |  |                           |   |  |                        |          |  |                                                      |  |           |                                                           |  |  |              |   |  |       |           |   |                          |  | (2,245,445  | )           |  |  | (2,245,445  | ) |  |  |          |   |  |  | (2,245,445  | )
|Treasury stock cancelled                                                                          |  |                                           | (3,000,000  | ) |                    |  |       |                          |  |  | (1,843,588                 | ) |  |                        |          |  |                                                      |  |           |                                                           |  |  |              |   |  |       |           |   |                          |  | 4,843,588   |             |  |  |            |   |  |  |          |   |  |  |            |  
|Share of changes in net assets of associates and joint ventures accounted for using equity
method |  |                                           |            |   |                    |  |       |                          |  |  | (5,157                     | ) |  |                        |          |  |                                                      |  |           |                                                           |  |  |              |   |  |       |           |   |                          |  |            |             |  |  | (5,157      | ) |  |  |          |   |  |  | (5,157      | )
|Changes in subsidiaries ownership                                                                |  |                                           |            |   |                    |  |       |                          |  |  | 251,136                    |   |  |                        |          |  |                                                      |  |           |                                                           |  |  |              |   |  |       |           |   |                          |  |            |             |  |  | 251,136     |   |  |  | (600,009  | ) |  |  | (348,873    | )
|Adjustments due to reciprocal stockholdings held by subsidiaries and associates                   |  |                                           |            |   |                    |  |       |                          |  |  | 59,023                     |   |  |                        |          |  |                                                      |  |           |                                                           |  |  |              |   |  |       |           |   |                          |  |            |             |  |  | 59,023      |   |  |  |          |   |  |  | 59,023      |  
|Effect of consolidation of subsidiaries                                                           |  |                                           |            |   |                    |  |       |                          |  |  |                           |   |  |                        |          |  |                                                      |  |           |                                                           |  |  |              |   |  |       |           |   |                          |  |            |             |  |  |            |   |  |  | 2,862,881 |   |  |  | 2,862,881   |  
|                                                                                                  |  |                                           |             |   |                    |  |        |                          |  |  |                            |   |  |                        |           |  |                                                      |  |            |                                                           |  |  |               |   |  |       |            |   |                          |  |             |             |  |  |             |   |  |  |           |   |  |  |             |  
|Balance as of December 31, 2013                                                                   |  |                                           | 126,920,817 |   |                    |  | 25,682 |                          |  |  | 45,787,456                 |   |  |                        | 5,248,824 |  |                                                      |  | 33,054,952 |                                                           |  |  | (5,243,972    | ) |  |       | 9,423,321  |   |                          |  | (9,893,082  | )           |  |  | 205,323,998 |   |  |  | 4,319,988 |   |  |  | 209,643,986 |  
|                                                                                                  |  |                                           |             |   |                    |  |        |                          |  |  |                            |   |  |                        |           |  |                                                      |  |            |                                                           |  |  |               |   |  |       |            |   |                          |  |             |             |  |  |             |   |  |  |           |   |  |  |             |  

The accompanying notes are an integral part of the consolidated financial statements.



F-5



---

##### Table of Contents

UNITED MICROELECTRONICS CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY

For the year ended December 31, 2014

(Expressed in Thousands)



|                                                                                                  |  |                                           |             |  |                    |  |        |                          |  |  |                            |   |  |                        |           |  |                                                      |  |            |                                                           |  |  |               |   |  |       |            |  |                          |  |             |             |  |  |             |   |  |  |           |   |  |  |             |  
|------------------------------------------------------------------------------------------------- |  | ----------------------------------------- | ----------- |  | ------------------ |  | ------ | ------------------------ |  |  | -------------------------- | - |  | ---------------------- | --------- |  | ---------------------------------------------------- |  | ---------- | --------------------------------------------------------- |  |  | ------------- | - |  | ----- | ---------- |  | ------------------------ |  | ----------- | ----------- |  |  | ----------- | - |  |  | --------- | - |  |  | ----------- | -
|                                                                                                  |  | Equity Attributable to the Parent Company |             |  |                    |  |        |                          | 
|                                                                                                  |  | Capital                                   |             |  |                    |  |        | Retained Earnings        |  |  | Other Components of Equity |   |  |                        |           |  |                                                      |  |            |                                                           |  |  |               |  
|                                                                                                  |  | CommonStock                               |             |  | CollectedinAdvance |  |        | AdditionalPaid-inCapital |  |  | LegalReserve               |   |  | UnappropriatedEarnings |           |  | ExchangeDifferencesonTranslationof ForeignOperations |  |            | UnrealizedGain orLoss onAvailable-for-SaleFinancialAssets |  |  | TreasuryStock |   |  | Total |            |  | Non-controllingInterests |  |             | TotalEquity | 
|                                                                                                  |  | NT$                                       |             |  | NT$                |  |        | NT$                      |  |  | NT$                        |   |  | NT$                    |           |  | NT$                                                  |  |            | NT$                                                       |  |  | NT$           |   |  | NT$   |            |  | NT$                      |  |             | NT$         | 
|Balance as of January 1, 2014                                                                     |  |                                           | 126,920,817 |  |                    |  | 25,682 |                          |  |  | 45,787,456                 |   |  |                        | 5,248,824 |  |                                                      |  | 33,054,952 |                                                           |  |  | (5,243,972    | ) |  |       | 9,423,321  |  |                          |  | (9,893,082  | )           |  |  | 205,323,998 |   |  |  | 4,319,988 |   |  |  | 209,643,986 |  
|Appropriation and distribution of 2013 retained earnings                                          |  |                                           |             |  |                    |  |        |                          |  |  |                            |   |  |                        |           |  |                                                      |  |            |                                                           |  |  |               |   |  |       |            |  |                          |  |             |             |  |  |             |   |  |  |           |   |  |  |             |  
|Legal reserve                                                                                     |  |                                           |            |  |                    |  |       |                          |  |  |                           |   |  |                        | 1,263,020 |  |                                                      |  | (1,263,020 | )                                                         |  |  |              |   |  |       |           |  |                          |  |            |             |  |  |            |   |  |  |          |   |  |  |            |  
|Cash dividends                                                                                    |  |                                           |            |  |                    |  |       |                          |  |  |                           |   |  |                        |          |  |                                                      |  | (125,063   | )                                                         |  |  |              |   |  |       |           |  |                          |  |            |             |  |  | (125,063    | ) |  |  |          |   |  |  | (125,063    | )
|Cash paid from additional paid-in capital                                                         |  |                                           |            |  |                    |  |       |                          |  |  | (6,128,094                 | ) |  |                        |          |  |                                                      |  |           |                                                           |  |  |              |   |  |       |           |  |                          |  |            |             |  |  | (6,128,094  | ) |  |  |          |   |  |  | (6,128,094  | )
|Net income for the year ended December 31, 2014                                                   |  |                                           |            |  |                    |  |       |                          |  |  |                           |   |  |                        |          |  |                                                      |  | 11,108,940 |                                                           |  |  |              |   |  |       |           |  |                          |  |            |             |  |  | 11,108,940  |   |  |  | (661,752  | ) |  |  | 10,447,188  |  
|Other comprehensive income (loss), net of tax for the year ended December 31, 2014                |  |                                           |            |  |                    |  |       |                          |  |  |                           |   |  |                        |          |  |                                                      |  | (2,086     | )                                                         |  |  | 4,364,946     |   |  |       | 1,563,441  |  |                          |  |            |             |  |  | 5,926,301   |   |  |  | 142,991   |   |  |  | 6,069,292   |  
|                                                                                                  |  |                                           |             |  |                    |  |        |                          |  |  |                            |   |  |                        |           |  |                                                      |  |            |                                                           |  |  |               |   |  |       |            |  |                          |  |             |             |  |  |             |   |  |  |           |   |  |  |             |  
|Total comprehensive income (loss)                                                                 |  |                                           |            |  |                    |  |       |                          |  |  |                           |   |  |                        |          |  |                                                      |  | 11,106,854 |                                                           |  |  | 4,364,946     |   |  |       | 1,563,441  |  |                          |  |            |             |  |  | 17,035,241  |   |  |  | (518,761  | ) |  |  | 16,516,480  |  
|                                                                                                  |  |                                           |             |  |                    |  |        |                          |  |  |                            |   |  |                        |           |  |                                                      |  |            |                                                           |  |  |               |   |  |       |            |  |                          |  |             |             |  |  |             |   |  |  |           |   |  |  |             |  
|Share-based payment transaction                                                                   |  |                                           | 331,261     |  |                    |  | 25,288 |                          |  |  | 32,889                     |   |  |                        |          |  |                                                      |  |           |                                                           |  |  |              |   |  |       |           |  |                          |  | 61,637      |             |  |  | 451,075     |   |  |  |          |   |  |  | 451,075     |  
|Convertible bonds repurchased                                                                     |  |                                           |            |  |                    |  |       |                          |  |  | 48,756                     |   |  |                        |          |  |                                                      |  |           |                                                           |  |  |              |   |  |       |           |  |                          |  |            |             |  |  | 48,756      |   |  |  |          |   |  |  | 48,756      |  
|Share of changes in net assets of associates and joint ventures accounted for using equity
method |  |                                           |            |  |                    |  |       |                          |  |  | (1,237                     | ) |  |                        |          |  |                                                      |  |           |                                                           |  |  |              |   |  |       |           |  |                          |  |            |             |  |  | (1,237      | ) |  |  |          |   |  |  | (1,237      | )
|Changes in subsidiaries ownership                                                                |  |                                           |            |  |                    |  |       |                          |  |  | 93,147                     |   |  |                        |          |  |                                                      |  | (113,153   | )                                                         |  |  |              |   |  |       |           |  |                          |  |            |             |  |  | (20,006     | ) |  |  | 59,785    |   |  |  | 39,779      |  
|Adjustments due to reciprocal stockholdings held by subsidiaries and associates                   |  |                                           |            |  |                    |  |       |                          |  |  | 90,408                     |   |  |                        |          |  |                                                      |  |           |                                                           |  |  |              |   |  |       |           |  |                          |  | (185,843    | )           |  |  | (95,435     | ) |  |  |          |   |  |  | (95,435     | )
|Effect of deconsolidation of subsidiaries                                                         |  |                                           |            |  |                    |  |       |                          |  |  |                           |   |  |                        |          |  |                                                      |  |           |                                                           |  |  |              |   |  |       |           |  |                          |  |            |             |  |  |            |   |  |  | (11,214   | ) |  |  | (11,214     | )
|                                                                                                  |  |                                           |             |  |                    |  |        |                          |  |  |                            |   |  |                        |           |  |                                                      |  |            |                                                           |  |  |               |   |  |       |            |  |                          |  |             |             |  |  |             |   |  |  |           |   |  |  |             |  
|Balance as of December 31, 2014                                                                   |  |                                           | 127,252,078 |  |                    |  | 50,970 |                          |  |  | 39,923,325                 |   |  |                        | 6,511,844 |  |                                                      |  | 42,660,570 |                                                           |  |  | (879,026      | ) |  |       | 10,986,762 |  |                          |  | (10,017,288 | )           |  |  | 216,489,235 |   |  |  | 3,849,798 |   |  |  | 220,339,033 |  
|                                                                                                  |  |                                           |             |  |                    |  |        |                          |  |  |                            |   |  |                        |           |  |                                                      |  |            |                                                           |  |  |               |   |  |       |            |  |                          |  |             |             |  |  |             |   |  |  |           |   |  |  |             |  

The accompanying notes are an integral part of the consolidated financial statements.



F-6



---

##### Table of Contents

UNITED MICROELECTRONICS CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY

For the year ended December 31, 2015

(Expressed in Thousands)



|                                                                                                  |  |                                           |             |  |                    |  |         |                          |  |  |                            |   |  |                        |           |  |                                                      |  |            |                                                           |  |  |               |   |  |       |            |   |                          |  |             |             |  |  |             |   |  |  |            |   |  |  |             |  
|------------------------------------------------------------------------------------------------- |  | ----------------------------------------- | ----------- |  | ------------------ |  | ------- | ------------------------ |  |  | -------------------------- | - |  | ---------------------- | --------- |  | ---------------------------------------------------- |  | ---------- | --------------------------------------------------------- |  |  | ------------- | - |  | ----- | ---------- | - | ------------------------ |  | ----------- | ----------- |  |  | ----------- | - |  |  | ---------- | - |  |  | ----------- | -
|                                                                                                  |  | Equity Attributable to the Parent Company |             |  |                    |  |         |                          | 
|                                                                                                  |  | Capital                                   |             |  |                    |  |         | Retained Earnings        |  |  | Other Components of Equity |   |  |                        |           |  |                                                      |  |            |                                                           |  |  |               |  
|                                                                                                  |  | CommonStock                               |             |  | CollectedinAdvance |  |         | AdditionalPaid-inCapital |  |  | LegalReserve               |   |  | UnappropriatedEarnings |           |  | ExchangeDifferencesonTranslationof ForeignOperations |  |            | UnrealizedGain orLoss onAvailable-for-SaleFinancialAssets |  |  | TreasuryStock |   |  | Total |            |   | Non-controllingInterests |  |             | TotalEquity | 
|                                                                                                  |  | NT$                                       |             |  | NT$                |  |         | NT$                      |  |  | NT$                        |   |  | NT$                    |           |  | NT$                                                  |  |            | NT$                                                       |  |  | NT$           |   |  | NT$   |            |   | NT$                      |  |             | NT$         | 
|Balance as of January 1, 2015                                                                     |  |                                           | 127,252,078 |  |                    |  | 50,970  |                          |  |  | 39,923,325                 |   |  |                        | 6,511,844 |  |                                                      |  | 42,660,570 |                                                           |  |  | (879,026      | ) |  |       | 10,986,762 |   |                          |  | (10,017,288 | )           |  |  | 216,489,235 |   |  |  | 3,849,798  |   |  |  | 220,339,033 |  
|Appropriation and distribution of 2014 retained earnings                                          |  |                                           |             |  |                    |  |         |                          |  |  |                            |   |  |                        |           |  |                                                      |  |            |                                                           |  |  |               |   |  |       |            |   |                          |  |             |             |  |  |             |   |  |  |            |   |  |  |             |  
|Legal reserve                                                                                     |  |                                           |            |  |                    |  |        |                          |  |  |                           |   |  |                        | 1,214,134 |  |                                                      |  | (1,214,134 | )                                                         |  |  |              |   |  |       |           |   |                          |  |            |             |  |  |            |   |  |  |           |   |  |  |            |  
|Cash dividends                                                                                    |  |                                           |            |  |                    |  |        |                          |  |  |                           |   |  |                        |          |  |                                                      |  | (6,939,322 | )                                                         |  |  |              |   |  |       |           |   |                          |  |            |             |  |  | (6,939,322  | ) |  |  |           |   |  |  | (6,939,322  | )
|Net income for the year ended December 31, 2015                                                   |  |                                           |            |  |                    |  |        |                          |  |  |                           |   |  |                        |          |  |                                                      |  | 13,254,071 |                                                           |  |  |              |   |  |       |           |   |                          |  |            |             |  |  | 13,254,071  |   |  |  | (612,973   | ) |  |  | 12,641,098  |  
|Other comprehensive income (loss), net of tax for the year ended December 31, 2015                |  |                                           |            |  |                    |  |        |                          |  |  |                           |   |  |                        |          |  |                                                      |  | (35,222    | )                                                         |  |  | 2,868,328     |   |  |       | (3,835,611 | ) |                          |  |            |             |  |  | (1,002,505  | ) |  |  | (62,114    | ) |  |  | (1,064,619  | )
|                                                                                                  |  |                                           |             |  |                    |  |         |                          |  |  |                            |   |  |                        |           |  |                                                      |  |            |                                                           |  |  |               |   |  |       |            |   |                          |  |             |             |  |  |             |   |  |  |            |   |  |  |             |  
|Total comprehensive income (loss)                                                                 |  |                                           |            |  |                    |  |        |                          |  |  |                           |   |  |                        |          |  |                                                      |  | 13,218,849 |                                                           |  |  | 2,868,328     |   |  |       | (3,835,611 | ) |                          |  |            |             |  |  | 12,251,566  |   |  |  | (675,087   | ) |  |  | 11,576,479  |  
|                                                                                                  |  |                                           |             |  |                    |  |         |                          |  |  |                            |   |  |                        |           |  |                                                      |  |            |                                                           |  |  |               |   |  |       |            |   |                          |  |             |             |  |  |             |   |  |  |            |   |  |  |             |  
|Share-based payment transaction                                                                   |  |                                           | 329,251     |  |                    |  | (50,970 | )                        |  |  | 254,974                    |   |  |                        |          |  |                                                      |  |           |                                                           |  |  |              |   |  |       |           |   |                          |  | 681,445     |             |  |  | 1,214,700   |   |  |  |           |   |  |  | 1,214,700   |  
|Embedded conversion options derived from convertible bonds                                        |  |                                           |            |  |                    |  |        |                          |  |  | 1,572,121                  |   |  |                        |          |  |                                                      |  |           |                                                           |  |  |              |   |  |       |           |   |                          |  |            |             |  |  | 1,572,121   |   |  |  |           |   |  |  | 1,572,121   |  
|Treasury stock acquired                                                                           |  |                                           |            |  |                    |  |        |                          |  |  |                           |   |  |                        |          |  |                                                      |  |           |                                                           |  |  |              |   |  |       |           |   |                          |  | (2,203,442  | )           |  |  | (2,203,442  | ) |  |  |           |   |  |  | (2,203,442  | )
|Share of changes in net assets of associates and joint ventures accounted for using equity
method |  |                                           |            |  |                    |  |        |                          |  |  | (2,946                     | ) |  |                        |          |  |                                                      |  |           |                                                           |  |  |              |   |  |       |           |   |                          |  |            |             |  |  | (2,946      | ) |  |  |           |   |  |  | (2,946      | )
|Changes in subsidiaries ownership                                                                |  |                                           |            |  |                    |  |        |                          |  |  | 357,393                    |   |  |                        |          |  |                                                      |  | (105,461   | )                                                         |  |  |              |   |  |       |           |   |                          |  |            |             |  |  | 251,932     |   |  |  | (127,817   | ) |  |  | 124,115     |  
|Adjustments due to reciprocal stockholdings held by subsidiaries and associates                   |  |                                           |            |  |                    |  |        |                          |  |  | 78,528                     |   |  |                        |          |  |                                                      |  |           |                                                           |  |  |              |   |  |       |           |   |                          |  | 120,972     |             |  |  | 199,500     |   |  |  |           |   |  |  | 199,500     |  
|Effect of deconsolidation of subsidiaries                                                         |  |                                           |            |  |                    |  |        |                          |  |  |                           |   |  |                        |          |  |                                                      |  |           |                                                           |  |  |              |   |  |       |           |   |                          |  |            |             |  |  |            |   |  |  | (1,019,829 | ) |  |  | (1,019,829  | )
|Others                                                                                            |  |                                           |            |  |                    |  |        |                          |  |  | (7,762                     | ) |  |                        |          |  |                                                      |  |           |                                                           |  |  |              |   |  |       |           |   |                          |  |            |             |  |  | (7,762      | ) |  |  |           |   |  |  | (7,762      | )
|                                                                                                  |  |                                           |             |  |                    |  |         |                          |  |  |                            |   |  |                        |           |  |                                                      |  |            |                                                           |  |  |               |   |  |       |            |   |                          |  |             |             |  |  |             |   |  |  |            |   |  |  |             |  
|Balance as of December 31, 2015                                                                   |  |                                           | 127,581,329 |  |                    |  |        |                          |  |  | 42,175,633                 |   |  |                        | 7,725,978 |  |                                                      |  | 47,620,502 |                                                           |  |  | 1,989,302     |   |  |       | 7,151,151  |   |                          |  | (11,418,313 | )           |  |  | 222,825,582 |   |  |  | 2,027,065  |   |  |  | 224,852,647 |  
|                                                                                                  |  |                                           |             |  |                    |  |         |                          |  |  |                            |   |  |                        |           |  |                                                      |  |            |                                                           |  |  |               |   |  |       |            |   |                          |  |             |             |  |  |             |   |  |  |            |   |  |  |             |  

The accompanying notes are an integral part of the consolidated financial statements.



F-7



---

##### Table of Contents

UNITED MICROELECTRONICS CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

For the years ended December 31, 2013, 2014 and 2015

(Expressed in Thousands)



|                                                                                             |  |                                  |             |   |      |  |             |      |  |  |             |   |  |  |            |  
|-------------------------------------------------------------------------------------------- |  | -------------------------------- | ----------- | - | ---- |  | ----------- | ---- |  |  | ----------- | - |  |  | ---------- | -
|                                                                                             |  | For the years ended December 31, |            
|                                                                                             |  | 2013                             |             |   | 2014 |  |             | 2015 | 
|                                                                                             |  | NT$                              |             |   | NT$  |  |             | NT$  |  |  | US$         |  
|Cash flows from operating activities:                                                        |  |                                  |             |   |      |  |             |      |  |  |             |   |  |  |            |  
|Net income before tax                                                                        |  |                                  | 14,340,472  |   |      |  | 13,572,303  |      |  |  | 13,668,598  |   |  |  | 416,852    |  
|                                                                                             |  |                                  |             |  
|Adjustments to reconcile net income before tax to net cash provided by operating
activities: |  |                                  |             |   |      |  |             |      |  |  |             |   |  |  |            |  
|Depreciation                                                                                 |  |                                  | 37,241,788  |   |      |  | 38,785,576  |      |  |  | 43,473,008  |   |  |  | 1,325,801  |  
|Amortization                                                                                 |  |                                  | 1,190,524   |   |      |  | 1,871,778   |      |  |  | 1,999,101   |   |  |  | 60,967     |  
|Bad debt expenses (reversal)                                                                 |  |                                  | (36,821     | ) |      |  | 104,841     |      |  |  | (183,957    | ) |  |  | (5,610     | )
|Net loss (gain) of financial assets and liabilities at fair value through profit or loss     |  |                                  | (191,686    | ) |      |  | (54,228     | )    |  |  | 94,453      |   |  |  | 2,880      |  
|Interest expense                                                                             |  |                                  | 596,232     |   |      |  | 687,178     |      |  |  | 470,310     |   |  |  | 14,343     |  
|Interest revenue                                                                             |  |                                  | (301,726    | ) |      |  | (495,730    | )    |  |  | (356,084    | ) |  |  | (10,860    | )
|Dividend revenue                                                                             |  |                                  | (789,583    | ) |      |  | (706,719    | )    |  |  | (692,858    | ) |  |  | (21,130    | )
|Share-based payment                                                                          |  |                                  | 28,337      |   |      |  | 24,382      |      |  |  | 838         |   |  |  | 25         |  
|Share of profit of associates and joint ventures                                             |  |                                  | (697,931    | ) |      |  | (37,179     | )    |  |  | (4,694      | ) |  |  | (143       | )
|Gain on disposal of property, plant and equipment                                            |  |                                  | (40,897     | ) |      |  | (81,811     | )    |  |  | (97,366     | ) |  |  | (2,969     | )
|Gain on disposal of non-current assets held for sale                                         |  |                                  |            |   |      |  |            |      |  |  | (41,203     | ) |  |  | (1,257     | )
|Gain on disposal of investments                                                              |  |                                  | (2,224,418  | ) |      |  | (2,445,259  | )    |  |  | (2,517,137  | ) |  |  | (76,765    | )
|Impairment loss on financial assets                                                          |  |                                  | 1,275,775   |   |      |  | 304,517     |      |  |  | 1,245,491   |   |  |  | 37,984     |  
|Impairment loss on non-financial assets                                                      |  |                                  | 56,693      |   |      |  | 596,678     |      |  |  | 1,021,010   |   |  |  | 31,138     |  
|Gain on repurchases of bonds                                                                 |  |                                  | (83,629     | ) |      |  | (13,944     | )    |  |  |            |   |  |  |           |  
|Exchange loss (gain) on financial assets and liabilities                                     |  |                                  | 208,493     |   |      |  | 361,191     |      |  |  | (125,836    | ) |  |  | (3,838     | )
|Exchange loss on long-term liabilities                                                       |  |                                  | 190,737     |   |      |  | 119,846     |      |  |  |            |   |  |  |           |  
|Bargain purchase gain                                                                        |  |                                  | (7,153,529  | ) |      |  |            |      |  |  |            |   |  |  |           |  
|Amortization of deferred income                                                              |  |                                  | (44,101     | ) |      |  | (41,090     | )    |  |  | (34,405     | ) |  |  | (1,049     | )
|                                                                                             |  |                                  |             |   |      |  |             |      |  |  |             |   |  |  |            |  
|Income and expense adjustments                                                               |  |                                  | 29,224,258  |   |      |  | 38,980,027  |      |  |  | 44,250,671  |   |  |  | 1,349,517  |  
|Changes in operating assets and liabilities:                                                 |  |                                  |             |   |      |  |             |      |  |  |             |   |  |  |            |  
|Financial assets and liabilities at fair value through profit or loss                        |  |                                  | 460         |   |      |  | (23,235     | )    |  |  | (36,262     | ) |  |  | (1,106     | )
|Notes receivable and accounts receivable                                                     |  |                                  | 886,762     |   |      |  | (6,013,039  | )    |  |  | 3,429,797   |   |  |  | 104,599    |  
|Other receivables                                                                            |  |                                  | 89,343      |   |      |  | (18,507     | )    |  |  | (22,615     | ) |  |  | (690       | )
|Inventories                                                                                  |  |                                  | (112,589    | ) |      |  | (1,893,932  | )    |  |  | (1,917,966  | ) |  |  | (58,492    | )
|Prepayments                                                                                  |  |                                  | 373,795     |   |      |  | (861,497    | )    |  |  | (696,632    | ) |  |  | (21,245    | )
|Other current assets                                                                         |  |                                  | (1,889,239  | ) |      |  | (985,505    | )    |  |  | 2,116,853   |   |  |  | 64,558     |  
|Notes and accounts payable                                                                   |  |                                  | 845,365     |   |      |  | (711,229    | )    |  |  | (498,776    | ) |  |  | (15,211    | )
|Other payables                                                                               |  |                                  | (176,478    | ) |      |  | 2,032,810   |      |  |  | 1,079,596   |   |  |  | 32,924     |  
|Other current liabilities                                                                    |  |                                  | (16,168     | ) |      |  | 158,440     |      |  |  | (181,193    | ) |  |  | (5,526     | )
|Net defined benefit liabilities                                                              |  |                                  | 15,020      |   |      |  | 25,098      |      |  |  | 25,112      |   |  |  | 766        |  
|Other noncurrent liabilities-others                                                          |  |                                  | 62,928      |   |      |  | (3,178      | )    |  |  | 532,367     |   |  |  | 16,236     |  
|                                                                                             |  |                                  |             |   |      |  |             |      |  |  |             |   |  |  |            |  
|Cash generated from operations                                                               |  |                                  | 43,643,929  |   |      |  | 44,258,556  |      |  |  | 61,749,550  |   |  |  | 1,883,182  |  
|Interest received                                                                            |  |                                  | 282,564     |   |      |  | 494,148     |      |  |  | 368,617     |   |  |  | 11,242     |  
|Dividend received                                                                            |  |                                  | 808,564     |   |      |  | 888,281     |      |  |  | 917,040     |   |  |  | 27,967     |  
|Interest paid                                                                                |  |                                  | (446,070    | ) |      |  | (565,845    | )    |  |  | (648,938    | ) |  |  | (19,791    | )
|Income tax paid                                                                              |  |                                  | (816,526    | ) |      |  | (286,888    | )    |  |  | (2,343,390  | ) |  |  | (71,466    | )
|                                                                                             |  |                                  |             |   |      |  |             |      |  |  |             |   |  |  |            |  
|Net cash provided by operating activities                                                    |  |                                  | 43,472,461  |   |      |  | 44,788,252  |      |  |  | 60,042,879  |   |  |  | 1,831,134  |  
|                                                                                             |  |                                  |             |   |      |  |             |      |  |  |             |   |  |  |            |  
|Cash flows from investing activities:                                                        |  |                                  |             |   |      |  |             |      |  |  |             |   |  |  |            |  
|Acquisition of financial assets at fair value through profit or loss                         |  |                                  | (79,758     | ) |      |  | (180,966    | )    |  |  | (136,264    | ) |  |  | (4,155     | )
|Proceeds from disposal of financial assets at fair value through profit or loss              |  |                                  | 104,302     |   |      |  | 22,292      |      |  |  |            |   |  |  |           |  
|Acquisition of available-for-sale financial assets                                           |  |                                  | (733,034    | ) |      |  | (1,941,739  | )    |  |  | (4,800,576  | ) |  |  | (146,404   | )
|Proceeds from disposal of available-for-sale financial assets                                |  |                                  | 2,965,245   |   |      |  | 3,311,317   |      |  |  | 1,964,457   |   |  |  | 59,910     |  
|Acquisition of financial assets measured at cost                                             |  |                                  | (1,263,269  | ) |      |  | (489,035    | )    |  |  | (95,310     | ) |  |  | (2,907     | )
|Proceeds from disposal of financial assets measured at cost                                  |  |                                  | 84,120      |   |      |  | 677,339     |      |  |  | 57,584      |   |  |  | 1,756      |  
|Acquisition of investments accounted for under the equity method                             |  |                                  | (8,560      | ) |      |  | (182,184    | )    |  |  | (2,474,851  | ) |  |  | (75,476    | )
|Proceeds from disposal of investments accounted for under the equity method                  |  |                                  | 161         |   |      |  | 74,394      |      |  |  |            |   |  |  |           |  
|Decrease in prepayment for investments                                                       |  |                                  | 34,803      |   |      |  |            |      |  |  |            |   |  |  |           |  
|Proceeds from capital reduction and liquidation of investments                               |  |                                  | 372,550     |   |      |  | 131,172     |      |  |  | 559,830     |   |  |  | 17,073     |  
|Acquisition of subsidiaries (net of cash acquired)                                           |  |                                  | 2,641,314   |   |      |  |            |      |  |  | 414,958     |   |  |  | 12,655     |  
|Disposal of subsidiaries                                                                     |  |                                  | (93,284     | ) |      |  | (15,617     | )    |  |  | (834,955    | ) |  |  | (25,464    | )
|Acquisition of property, plant and equipment                                                 |  |                                  | (32,911,352 | ) |      |  | (43,237,007 | )    |  |  | (60,504,149 | ) |  |  | (1,845,201 | )
|Proceeds from disposal of property, plant and equipment                                      |  |                                  | 576,634     |   |      |  | 338,196     |      |  |  | 148,316     |   |  |  | 4,523      |  
|Proceeds from disposal of non-current assets held for sale                                   |  |                                  |            |   |      |  |            |      |  |  | 641,866     |   |  |  | 19,575     |  
|Increase in refundable deposits                                                              |  |                                  | (184,306    | ) |      |  | (94,112     | )    |  |  | (1,818,998  | ) |  |  | (55,474    | )
|Decrease in refundable deposits                                                              |  |                                  | 277,333     |   |      |  | 231,107     |      |  |  | 316,180     |   |  |  | 9,643      |  
|Acquisition of intangible assets                                                             |  |                                  | (2,881,754  | ) |      |  | (1,153,356  | )    |  |  | (1,088,313  | ) |  |  | (33,190    | )
|Cash inflow from combination                                                                 |  |                                  |            |   |      |  |            |      |  |  | 1,583       |   |  |  | 48         |  
|Increase in other noncurrent assets-others                                                   |  |                                  | (430,857    | ) |      |  | (340,611    | )    |  |  | (1,116,501  | ) |  |  | (34,050    | )
|Decrease in other noncurrent assets-others                                                   |  |                                  | 13,548      |   |      |  | 242,996     |      |  |  | 29,349      |   |  |  | 895        |  
|                                                                                             |  |                                  |             |   |      |  |             |      |  |  |             |   |  |  |            |  
|Net cash used in investing activities                                                        |  |                                  | (31,516,164 | ) |      |  | (42,605,814 | )    |  |  | (68,735,794 | ) |  |  | (2,096,243 | )
|                                                                                             |  |                                  |             |   |      |  |             |      |  |  |             |   |  |  |            |  

The accompanying notes are an integral part of the consolidated financial statements.



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UNITED MICROELECTRONICS CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

For the years ended December 31, 2013, 2014 and 2015

(Expressed in Thousands)



|                                                                            |  |                                  |             |   |      |  |             |      |  |  |             |   |  |  |           |  
|--------------------------------------------------------------------------- |  | -------------------------------- | ----------- | - | ---- |  | ----------- | ---- |  |  | ----------- | - |  |  | --------- | -
|                                                                            |  | For the years ended December 31, |            
|                                                                            |  | 2013                             |             |   | 2014 |  |             | 2015 | 
|                                                                            |  | NT$                              |             |   | NT$  |  |             | NT$  |  |  | US$         |  
|Cash flows from financing activities:                                       |  |                                  |             |   |      |  |             |      |  |  |             |   |  |  |           |  
|Increase in short-term loans                                                |  |                                  | 13,149,006  |   |      |  | 9,879,359   |      |  |  | 14,965,506  |   |  |  | 456,405   |  
|Decrease in short-term loans                                                |  |                                  | (14,371,089 | ) |      |  | (5,744,551  | )    |  |  | (14,900,862 | ) |  |  | (454,433  | )
|Proceeds from bonds issued                                                  |  |                                  | 10,000,000  |   |      |  | 5,000,000   |      |  |  | 18,424,800  |   |  |  | 561,903   |  
|Bonds issuance costs                                                        |  |                                  | (12,010     | ) |      |  | (5,090      | )    |  |  | (83,880     | ) |  |  | (2,558    | )
|Redemption of bonds                                                         |  |                                  | (2,153,438  | ) |      |  | (14,137,308 | )    |  |  |            |   |  |  |          |  
|Proceeds from long-term loans                                               |  |                                  | 2,737,337   |   |      |  | 6,284,000   |      |  |  | 4,952,870   |   |  |  | 151,048   |  
|Repayments of long-term loans                                               |  |                                  | (6,199,532  | ) |      |  | (3,858,996  | )    |  |  | (5,337,929  | ) |  |  | (162,791  | )
|Increase in guarantee deposits                                              |  |                                  | 171,267     |   |      |  | 133,172     |      |  |  | 50,061      |   |  |  | 1,527     |  
|Decrease in guarantee deposits                                              |  |                                  | (33,865     | ) |      |  | (26,026     | )    |  |  | (10,064     | ) |  |  | (307      | )
|Increase in other financial liabilities                                     |  |                                  |            |   |      |  |            |      |  |  | 6,107,635   |   |  |  | 186,265   |  
|Cash dividends and cash paid from additional paid-in capital                |  |                                  | (5,061,303  | ) |      |  | (6,253,150  | )    |  |  | (6,939,016  | ) |  |  | (211,620  | )
|Exercise of employee stock options                                          |  |                                  | 442,423     |   |      |  | 370,811     |      |  |  | 289,413     |   |  |  | 8,826     |  
|Treasury stock acquired                                                     |  |                                  | (2,245,445  | ) |      |  |            |      |  |  | (2,203,442  | ) |  |  | (67,199   | )
|Treasury stock sold to employees                                            |  |                                  |            |   |      |  | 61,653      |      |  |  | 681,614     |   |  |  | 20,787    |  
|Proceeds from disposal of treasury stock                                    |  |                                  | 967         |   |      |  |            |      |  |  |            |   |  |  |          |  
|Acquisition of non-controlling interests                                    |  |                                  | (343,989    | ) |      |  |            |      |  |  | (932,367    | ) |  |  | (28,434   | )
|Change in non-controlling interests                                         |  |                                  | (4,618      | ) |      |  | 38,261      |      |  |  | (15,102     | ) |  |  | (461      | )
|                                                                            |  |                                  |             |   |      |  |             |      |  |  |             |   |  |  |           |  
|Net cash provided by (used in) financing activities                         |  |                                  | (3,924,289  | ) |      |  | (8,257,865  | )    |  |  | 15,049,237  |   |  |  | 458,958   |  
|                                                                            |  |                                  |             |   |      |  |             |      |  |  |             |   |  |  |           |  
|Effect of exchange rate changes on cash and cash equivalents                |  |                                  | 310,180     |   |      |  | 1,457,172   |      |  |  | 721,688     |   |  |  | 22,010    |  
|                                                                            |  |                                  |             |   |      |  |             |      |  |  |             |   |  |  |           |  
|Net increase (decrease) in cash and cash equivalents                        |  |                                  | 8,342,188   |   |      |  | (4,618,255  | )    |  |  | 7,078,010   |   |  |  | 215,859   |  
|Cash and cash equivalents at beginning of year                              |  |                                  | 42,488,490  |   |      |  | 50,830,678  |      |  |  | 46,212,423  |   |  |  | 1,409,345 |  
|                                                                            |  |                                  |             |   |      |  |             |      |  |  |             |   |  |  |           |  
|Cash and cash equivalents at end of year                                    |  |                                  | 50,830,678  |   |      |  | 46,212,423  |      |  |  | 53,290,433  |   |  |  | 1,625,204 |  
|                                                                            |  |                                  |             |   |      |  |             |      |  |  |             |   |  |  |           |  
|                                                                            |  |                                  |             |  
|Reconciliation of the balances of cash and cash equivalents at end of year: |  |                                  |             |   |      |  |             |      |  |  |             |   |  |  |           |  
|Cash and cash equivalents balances on the consolidated balance sheets       |  |                                  | 50,830,678  |   |      |  | 45,701,335  |      |  |  | 53,290,433  |   |  |  | 1,625,204 |  
|Cash and cash equivalents included in non-current assets held for sale      |  |                                  |            |   |      |  | 511,088     |      |  |  |            |   |  |  |          |  
|                                                                            |  |                                  |             |   |      |  |             |      |  |  |             |   |  |  |           |  
|Cash and cash equivalents at end of year                                    |  |                                  | 50,830,678  |   |      |  | 46,212,423  |      |  |  | 53,290,433  |   |  |  | 1,625,204 |  
|                                                                            |  |                                  |             |   |      |  |             |      |  |  |             |   |  |  |           |  
|                                                                            |  |                                  |             |  
|Investing activities partially paid by cash:                                |  |                                  |             |   |      |  |             |      |  |  |             |   |  |  |           |  
|Cash paid for acquiring property, plant and equipment                       |  |                                  |             |   |      |  |             |      |  |  |             |   |  |  |           |  
|Increase in property, plant and equipment                                   |  |                                  | 34,140,108  |   |      |  | 47,278,467  |      |  |  | 64,654,844  |   |  |  | 1,971,785 |  
|Add: Effect of acquisition of subsidiaries                                  |  |                                  | 89,592      |   |      |  |            |      |  |  |            |   |  |  |          |  
|Add: Payable at beginning of year                                           |  |                                  | 5,382,395   |   |      |  | 6,700,743   |      |  |  | 10,742,203  |   |  |  | 327,606   |  
|Less: Effect of disposal of subsidiaries                                    |  |                                  |            |   |      |  |            |      |  |  | (127,297    | ) |  |  | (3,882    | )
|Less: Payable at end of year                                                |  |                                  | (6,700,743  | ) |      |  | (10,742,203 | )    |  |  | (14,765,601 | ) |  |  | (450,308  | )
|                                                                            |  |                                  |             |   |      |  |             |      |  |  |             |   |  |  |           |  
|Cash paid                                                                   |  |                                  | 32,911,352  |   |      |  | 43,237,007  |      |  |  | 60,504,149  |   |  |  | 1,845,201 |  
|                                                                            |  |                                  |             |   |      |  |             |      |  |  |             |   |  |  |           |  

The accompanying notes are an integral part of the consolidated financial statements.



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##### Table of Contents

UNITED MICROELECTRONICS CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Expressed in Thousands of New Taiwan Dollars unless Otherwise Specified)



|1. | HISTORY AND ORGANIZATION
|-- | ------------------------

United Microelectronics Corporation (UMC) was incorporated in
Republic of China (R.O.C.) in May 1980 and commenced operations in April 1982. UMC is a full service semiconductor wafer foundry, and provides a variety of services to satisfy customer needs. UMCs ordinary shares were publicly listed on the
Taiwan Stock Exchange (TWSE) in July 1985 and its American Depositary Shares (ADSs) were listed on the New York Stock Exchange (NYSE) in September 2000.

The address of its registered office and principal place of business is No. 3, Li-Hsin Road II, Hsinchu Science Park, Hsinchu City,
Taiwan. The principal operating activities of UMC and its subsidiaries (collectively as the Company) are described in Notes 4(3) and 12.



|2. | DATE AND PROCEDURES OF AUTHORIZATION OF FINANCIAL STATEMENTS FOR ISSUE
|-- | ----------------------------------------------------------------------

The consolidated
financial statements of the Company were approved and authorized for issue by the audit committee of the Board of Directors on April 15, 2016.



|3. | NEW ACCOUNTING PRONOUNCEMENT UNDER INTERNATIONAL FINANCIAL REPORTING STANDARDS (IFRSs)
|-- | --------------------------------------------------------------------------------------



| | a. | The Company has not adopted the following new, revised or amended IFRSs that have been issued by the International Accounting Standards Board (IASB) but not yet effective:
| | -- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|                  |  |                                                                                                        |  |                                                 
|----------------- |  | ------------------------------------------------------------------------------------------------------ |  | ------------------------------------------------
|No.               |  | The projects of Standards or Interpretations                                                           |  | Effective for annualperiods beginningon or
after
|IFRS 14           |  | Regulatory Deferral Accounts                                                                           |  | January 1, 2016                                 
|IFRS 11           |  | Accounting for Acquisitions of Interests in Joint Operations - Amendments to IFRS 11                   |  | January 1, 2016                                 
|IAS 16 and IAS 38 |  | Clarification of Acceptable Methods of Depreciation and Amortisation - Amendments to IAS 16
and IAS 38 |  | January 1, 2016                                 
|IAS 16 and IAS 41 |  | Agriculture: Bearer Plants - Amendments to IAS 16 and IAS 41                                           |  | January 1, 2016                                 



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##### Table of Contents

|                            |  |                                                                                                                          |  |                                                 
|--------------------------- |  | ------------------------------------------------------------------------------------------------------------------------ |  | ------------------------------------------------
|No.                         |  | The projects of Standards or Interpretations                                                                             |  | Effective for annualperiods beginningon or
after
|IAS 27                      |  | Equity Method in Separate Financial Statements - Amendments to IAS 27                                                    |  | January 1, 2016                                 
|IFRS 10 and IAS 28          |  | Sale or Contribution of Assets between an Investor and its Associate or Joint Venture - Amendments
to IFRS 10 and IAS 28 |  | Subject to IASBs announcement                  
|                            |  | Improvements to International Financial Reporting Standards (2012-2014 cycle)                                            |  |                                                 
|IFRS 5                      |  | Non-current Assets Held for Sale and Discontinued Operations                                                             |  | January 1, 2016                                 
|IFRS 7                      |  | Financial Instruments: Disclosures                                                                                       |  | January 1, 2016                                 
|IAS 19                      |  | Employee Benefits                                                                                                        |  | January 1, 2016                                 
|IAS 34                      |  | Interim Financial Reporting                                                                                              |  | January 1, 2016                                 
|IFRS 10, IFRS 12 and IAS 28 |  | Investment Entities: Applying the Consolidation Exception - Amendments to IFRS 10, IFRS 12 and IAS
28                    |  | January 1, 2016                                 
|IAS 1                       |  | Disclosure Initiative - Amendments to IAS 1                                                                              |  | January 1, 2016                                 
|IFRS 15                     |  | Revenue from Contracts with Customers                                                                                    |  | January 1, 2018                                 
|IFRS 9                      |  | Financial Instruments                                                                                                    |  | January 1, 2018                                 
|IFRS 16                     |  | Leases                                                                                                                   |  | January 1, 2019                                 
|IAS 12                      |  | Recognition of Deferred Tax Assets for Unrealised Losses - Amendments to IAS 12                                          |  | January 1, 2017                                 
|IAS 7                       |  | Disclosure Initiative - Amendments to IAS 7                                                                              |  | January 1, 2017                                 



| | b. | The potential effects of adopting the standards or interpretations issued by IASB on the Companys financial statements in future periods are summarized as below:
| | -- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------

IFRS 11 Accounting for Acquisitions of Interests in Joint Operations (Amendment) (IFRS 11)

The amendments to IFRS 11 require that the relevant principles on business combinations accounting in IFRS 3, Business Combinations
(IFRS 3) and other standards should be applied in accounting for the acquisition of an interest in a joint operation in which the activity constitutes a business. The amendments are applicable to both the acquisition of the initial interest in
a joint operation with an existing business and the acquisition of an additional interest in the same joint operation. However, a previously held interest is not remeasured when the acquisition of an additional interest in the same joint operation
results in retaining joint control. Transactions between an investor and a joint operation under common control are also excluded. The amendment is effective for annual periods beginning on or after January 1, 2016 with earlier application
permitted. The impact that adoption of the new amendment will have on our financial position and results of operation will be dependent upon the specific terms of any applicable future acquisition of joint arrangements.



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IAS 16 and IAS 38 Clarification of Acceptable Methods of Depreciation and
Amortisation (Amendment)

The amendment to IAS 16, Property, Plant and Equipment clarifies that depreciation of an
item of property, plant and equipment based on revenue generated by using the asset is not appropriate. The amendment to IAS 38, Intangible Assets establishes a rebuttable presumption that amortization of an intangible asset based
on revenue generated by using the asset is inappropriate. The presumption may only be rebutted in certain limited circumstances where the intangible asset is expressed as a measure of revenue; or where it can be demonstrated that revenue and the
consumption of the economic benefits of the intangible asset are highly correlated. The amendment is effective for annual periods beginning on or after January 1, 2016 with earlier application permitted and is not expected to have a material
impact on the Companys consolidated financial statements.

IFRS 10 Consolidated Financial Statements (IFRS 10) and
IAS 28 Investments in Associates and Joint Ventures (IAS 28) - Sale or Contribution of Assets between an Investor and its Associate or Joint Ventures (Amendment)

The amendments address the inconsistency between the requirements in IFRS 10 and IAS 28, in dealing with the loss of control of a subsidiary
that is contributed to an associate or a joint venture. IAS 28 restricts gains and losses arising from contributions of non-monetary assets to an associate or a joint venture to the extent of the interest attributable to the other equity
holders in the associate or joint ventures. IFRS 10 requires full profit or loss recognition on the loss of control of the subsidiary. IAS 28 was amended so that the gain or loss resulting from the sale or contribution of assets that
constitute a business as defined in IFRS 3 between an investor and its associate or joint venture is recognized in full. IFRS 10 was also amended so that the gains or loss resulting from the sale or contribution of a subsidiary that does not
constitute a business as defined in IFRS 3 between an investor and its associate or joint venture is recognized only to the extent of the unrelated investors interests in the associate or joint venture. The effective date of this amendment has
been postponed indefinitely, but early adoption is allowed. The amendment is not expected to have a material impact on the Companys consolidated financial statements.



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IAS 1 Presentation of Financial Statements - Disclosure Initiative
(Amendment)

The amendments (1) clarify that an entity must not reduce the understandability of its financial statements by obscuring
material information with immaterial information or by aggregating material items that have different natures or functions. The amendments reemphasize that, when a standard requires a specific disclosure, the information must be assessed to
determine whether it is material and, consequently, whether presentation or disclosure of that information is warranted, (2) clarify that specific line items in the statement(s) of profit or loss and OCI and the statement of financial position may
be disaggregated, and how an entity shall present additional subtotals, (3) clarify that entities have flexibility as to the order in which they present the notes to financial statements, but also emphasize that understandability and comparability
should be considered by an entity when deciding on that order, (4) removing the examples of the income taxes accounting policy and the foreign currency accounting policy, as these were considered unhelpful in illustrating what significant accounting
policies could be, and (5) clarify that the share of OCI of associates and joint ventures accounted for using the equity method must be presented in aggregate as a single line item, classified between those items that will or will not be
subsequently reclassified to profit or loss. The amendment is effective for annual periods beginning on or after January 1, 2016 and is not expected to have a material impact on the Companys consolidated financial statements.

IFRS 15 Revenue from Contracts with Customers (IFRS 15)

The core principle of IFRS 15 is that revenue is recognized to depict the transfer of promised goods or services to customers in an amount that
reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. IFRS 15 establishes a five-step model that will apply to revenue earned from a contract with a customer (with limited exceptions),
regardless of the type of revenue transaction or the industry. Extensive disclosures will be required, including disaggregation of total revenue; information related to performance obligations; changes in contract asset and liability account
balances between periods and key judgments and estimates. The standard will apply to annual periods beginning on or after January 1, 2018, and early adoption is permitted. When IFRS 15 is effective, the Company may elect to apply this
Standard either retrospectively to each prior reporting period presented or retrospectively with the cumulative effect of initially applying this Standard recognized at the date of initial application. The Company is currently assessing the
impact that the new standard may have on its consolidated financial statements.

IFRS 9 Financial Instruments (IFRS 9)

IASB has issued the final completed version of IFRS 9, which combines classification and measurement, the expected credit loss
impairment model and hedge accounting. The standard will replace IAS 39, Financial Instruments: Recognition and Measurement (IAS 39) and all previous versions of IFRS 9 which introduced new classification and measurement requirements (in
2009 and 2010) and a new hedge accounting model (in 2013). The final completed version of IFRS 9 requires the followings: (1) Classification and measurement: Financial assets are measured at amortized cost, fair value through profit or loss, or
fair value through other comprehensive income, based on both the entitys business model for managing the financial assets and the financial assets contractual cash flow characteristics. Financial liabilities are measured at amortized
cost or fair value through profit or loss. Furthermore there is requirement that own credit risk adjustments are not recognized in profit or loss. (2) Impairment: Expected credit loss model is used to evaluate impairment. Entities are
required to recognize either 12-month or lifetime expected credit losses, depending on whether there has been a significant increase in credit risk since initial recognition. (3) Hedge accounting: Hedge accounting is more closely aligned with
risk management activities and hedge effectiveness is measured based on the hedge ratio. The new standard is effective for annual periods beginning on or after January 1, 2018. The Company is currently assessing the impact that the new standard
may have on its consolidated financial statements.



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##### Table of Contents

IFRS 16 Leases (IFRS 16)

The new standard requires lessees to account for all leases under a single on-balance sheet model (subject to certain exemptions). Lessor
accounting still uses the dual classification approach: operating lease and finance lease. The Standard is effective for annual periods beginning on or after January 1, 2019. The Company is currently assessing the impact that the new standard
may have on its consolidated financial statements.

IAS 12 Income Taxes - Recognition of Deferred Tax Assets for Unrealised
Losses (Amendment)

The amendment clarifies how to account for deferred tax assets for unrealized losses. The amendment is effective
for annual periods beginning on or after January 1, 2017 and is not expected to have a material impact on the Companys consolidated financial statements.

IAS 7 Statement of Cash Flows - Disclosure Initiative (Amendment)

The amendment relates to changes in liabilities arising from financing activities and to require a reconciliation of the carrying amount of
liabilities at the beginning and end of the period. The amendment is effective for annual periods beginning on or after January 1, 2017 and is expected to increase the disclosures in the consolidated financial statements.



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|4. | SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
|-- | ------------------------------------------



| | (1) | Statement of Compliance
| | --- | -----------------------

The Companys consolidated financial statements were
prepared in accordance with IFRSs, including International Financial Reporting Standards, International Accounting Standards, IFRIC Interpretations and SIC Interpretations, as issued by IASB.



| | (2) | Basis of Preparation
| | --- | --------------------

The consolidated financial statements have been prepared on a
historical cost basis, except for financial instruments measured at fair value.



| | (3) | General Description of Reporting Entity
| | --- | ---------------------------------------



| | a. | Principles of consolidation
| | -- | ---------------------------

Subsidiaries are fully consolidated from the date of
acquisition (the date on which the Company obtains control), and continue to be consolidated until the date that such control ceases. The Company controls an entity when the Company is exposed to, or has rights to, variable returns from its
involvement with the entity and has the ability to affect those returns through its power over the entity. The financial statements of the subsidiaries are prepared for the same reporting period as the parent company, using consistent
accounting policies. All intra-group balances, transactions, unrealized gains and losses and dividends resulting from intra-group transactions are eliminated in full.

A change in the ownership interest of a subsidiary, without a change of control, is accounted for as an equity transaction. Total
comprehensive income of subsidiaries is attributed to the stockholders of the parent and to the non-controlling interests even if this results in the non-controlling interests having a deficit balance.

If the Company loses control over a subsidiary, the Company derecognizes the assets and liabilities of the subsidiary, as well as any
non-controlling interests previously recorded by the Company. A gain or loss is recognized in profit or loss and is calculated as the difference between: (a) the aggregate of the fair value of consideration received and the fair value of any
retained interest at the date when control is lost; and (b) the previous carrying amount of the assets (including goodwill), and liabilities of the subsidiary and any non-controlling interests. Any gain or loss previously recognized in the
other comprehensive income would be reclassified to profit or loss or transferred directly to retained earnings if required by other IFRSs. The fair value of any investment retained in the former subsidiary at the date when control is lost is
regarded as the cost on initial recognition of an investment.



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| | b. | The consolidated entities as of December 31, 2014 and 2015 were as follows:
| | -- | ---------------------------------------------------------------------------



|         |  |                                                 |  |                                                  |  |                                               |        |  |      |  |        | 
|-------- |  | ----------------------------------------------- |  | ------------------------------------------------ |  | --------------------------------------------- | ------ |  | ---- |  | ------ | 
|         |  |                                                 |  |                                                  |  | Percentage of ownership (%)as of December 31, |       
|Investor |  | Subsidiary                                      |  | Business nature                                  |  | 2014                                          |        |  | 2015 | 
|UMC      |  | UMC GROUP (USA)                                 |  | IC Sales                                         |  |                                               | 100.00 |  |      |  | 100.00 | 
|UMC      |  | UNITED MICROELECTRONICS (EUROPE) B.V.           |  | Marketing support activities                     |  |                                               | 100.00 |  |      |  | 100.00 | 
|UMC      |  | UMC CAPITAL CORP.                               |  | Investment holding                               |  |                                               | 100.00 |  |      |  | 100.00 | 
|UMC      |  | GREEN EARTH LIMITED (GE)                        |  | Investment holding                               |  |                                               | 100.00 |  |      |  | 100.00 | 
|UMC      |  | TLC CAPITAL CO., LTD. (TLC)                     |  | Venture capital                                  |  |                                               | 100.00 |  |      |  | 100.00 | 
|UMC      |  | UMC NEW BUSINESS INVESTMENT CORP. (NBI)         |  | Investment holding                               |  |                                               | 100.00 |  |      |  | 100.00 | 
|UMC      |  | UMC INVESTMENT (SAMOA) LIMITED                  |  | Investment holding                               |  |                                               | 100.00 |  |      |  | 100.00 | 
|UMC      |  | FORTUNE VENTURE CAPITAL CORP. (FORTUNE)         |  | Consulting and planning for venture capital      |  |                                               | 100.00 |  |      |  | 100.00 | 
|UMC      |  | UMC GROUP JAPAN                                 |  | IC Sales                                         |  |                                               | 100.00 |  |      |  | 100.00 | 
|UMC      |  | UMC KOREA CO., LTD.                             |  | Marketing support activities                     |  |                                               | 100.00 |  |      |  | 100.00 | 
|UMC      |  | OMNI GLOBAL LIMITED (OMNI)                      |  | Investment holding                               |  |                                               | 100.00 |  |      |  | 100.00 | 
|UMC      |  | BEST ELITE INTERNATIONAL LIMITED (BE)           |  | Investment holding                               |  |                                               | 86.88  |  |      |  | 91.06  | 
|UMC      |  | WAVETEK MICROELECTRONICS CORPORATION (WAVETEK)  |  | Sales and manufacturing of integrated circuits   |  |                                               | 81.53  |  |      |  | 77.74  | 
|UMC      |  | NEXPOWER TECHNOLOGY CORP. (NEXPOWER)            |  | Sales and manufacturing of solar power batteries |  |                                               | 44.16  |  |      |  | 43.10  | 
|FORTUNE  |  | UNITRUTH INVESTMENT CORP. (UNITRUTH)            |  | Investment holding                               |  |                                               | 100.00 |  |      |  | 100.00 | 
|FORTUNE  |  | NEXPOWER                                        |  | Sales and manufacturing of solar power batteries |  |                                               | 5.99   |  |      |  | 6.89   | 
|FORTUNE  |  | WAVETEK                                         |  | Sales and manufacturing of integrated circuits   |  |                                               |       |  |      |  | 0.45   | 
|FORTUNE  |  | TOPCELL SOLAR INTERNATIONAL CO., LTD. (TOPCELL) |  | Sales and manufacturing of solar power cell      |  |                                               | 26.04  |  |      |  |       | 



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|                               |  |                                                       |  |                                                  |  |                                               |        |  |      |  |        | 
|------------------------------ |  | ----------------------------------------------------- |  | ------------------------------------------------ |  | --------------------------------------------- | ------ |  | ---- |  | ------ | 
|                               |  |                                                       |  |                                                  |  | Percentage of ownership (%)as of December 31, |       
|Investor                       |  | Subsidiary                                            |  | Business nature                                  |  | 2014                                          |        |  | 2015 | 
|UNITRUTH                       |  | NEXPOWER                                              |  | Sales and manufacturing of solar power batteries |  |                                               | 2.25   |  |      |  | 13.01  | 
|UNITRUTH                       |  | WAVETEK                                               |  | Sales and manufacturing of integrated circuits   |  |                                               |       |  |      |  | 0.28   | 
|UNITRUTH                       |  | TOPCELL                                               |  | Sales and manufacturing of solar power cell      |  |                                               | 1.03   |  |      |  |       | 
|UMC CAPITAL CORP.              |  | UMC CAPITAL (USA)                                     |  | Investment holding                               |  |                                               | 100.00 |  |      |  | 100.00 | 
|UMC CAPITAL CORP.              |  | ECP VITA PTE. LTD.                                    |  | Insurance                                        |  |                                               | 100.00 |  |      |  | 100.00 | 
|TLC                            |  | SOARING CAPITAL CORP.                                 |  | Investment holding                               |  |                                               | 100.00 |  |      |  | 100.00 | 
|TLC                            |  | NEXPOWER                                              |  | Sales and manufacturing of solar power batteries |  |                                               | 5.87   |  |      |  | 4.54   | 
|TLC                            |  | TOPCELL                                               |  | Sales and manufacturing of solar power cell      |  |                                               | 2.37   |  |      |  |       | 
|SOARING CAPITAL CORP.          |  | UNITRUTH ADVISOR (SHANGHAI) CO., LTD.                 |  | Investment holding and advisory                  |  |                                               | 100.00 |  |      |  | 100.00 | 
|GE                             |  | UNITED MICROCHIP CORPORATION                          |  | Investment holding                               |  |                                               |       |  |      |  | 100.00 | 
|UMC INVESTMENT (SAMOA) LIMITED |  | UMC (BEIJING) LIMITED                                 |  | Marketing support activities                     |  |                                               | 100.00 |  |      |  | 100.00 | 
|NBI                            |  | TERA ENERGY DEVELOPMENT CO., LTD. (TERA ENERGY)       |  | Energy Technical Services                        |  |                                               | 100.00 |  |      |  | 100.00 | 
|NBI                            |  | UNISTARS CORP.                                        |  | High brightness LED packages                     |  |                                               | 78.72  |  |      |  | 82.76  | 
|NBI                            |  | TOPCELL                                               |  | Sales and manufacturing of solar power cell      |  |                                               | 62.38  |  |      |  |       | 
|TERA ENERGY                    |  | EVERRICH ENERGY INVESTMENT (HK) LIMITED (EVERRICH-HK) |  | Investment holding                               |  |                                               | 100.00 |  |      |  | 100.00 | 
|TERA ENERGY                    |  | TERA ENERGY USA INC.                                  |  | Solar project                                    |  |                                               | 100.00 |  |      |  |       | 
|TERA ENERGY                    |  | SMART ENERGY ENTERPRISES LIMITED                      |  | Investment holding                               |  |                                               | 100.00 |  |      |  |       | 



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|                    |  |                                                                     |  |                                                |  |                                               |        |  |      |  |        | 
|------------------- |  | ------------------------------------------------------------------- |  | ---------------------------------------------- |  | --------------------------------------------- | ------ |  | ---- |  | ------ | 
|                    |  |                                                                     |  |                                                |  | Percentage of ownership (%)as of December 31, |       
|Investor            |  | Subsidiary                                                          |  | Business nature                                |  | 2014                                          |        |  | 2015 | 
|EVERRICH-HK         |  | EVERRICH (SHANDONG) ENERGY CO., LTD.                                |  | Solar engineering integrated design services   |  |                                               | 100.00 |  |      |  | 100.00 | 
|OMNI                |  | UNITED MICROTECHNOLOGY CORPORATION (NEW YORK)                       |  | Research and development                       |  |                                               | 100.00 |  |      |  | 100.00 | 
|OMNI                |  | UNITED MICROTECHNOLOGY CORPORATION (CALIFORNIA)                     |  | Research and development                       |  |                                               | 100.00 |  |      |  | 100.00 | 
|WAVETEK             |  | WAVETEK MICROELECTRONICS INVESTMENT (SAMOA) LIMITED (WAVETEK-SAMOA) |  | Investment holding                             |  |                                               | 100.00 |  |      |  | 100.00 | 
|WAVETEK-SAMOA       |  | WAVETEK MICROELECTRONICS CORPORATION (USA)                          |  | Sales and marketing service                    |  |                                               | 100.00 |  |      |  | 100.00 | 
|NEXPOWER            |  | NPT HOLDING LIMITED                                                 |  | Investment holding                             |  |                                               | 100.00 |  |      |  | 100.00 | 
|NEXPOWER            |  | SOCIALNEX ITALIA 1 S.R.L.                                           |  | Photovoltaic power plant                       |  |                                               | 100.00 |  |      |  | 100.00 | 
|NPT HOLDING LIMITED |  | NLL HOLDING LIMITED                                                 |  | Investment holding                             |  |                                               | 100.00 |  |      |  | 100.00 | 
|BE                  |  | INFOSHINE TECHNOLOGY LIMITED (INFOSHINE)                            |  | Investment holding                             |  |                                               | 100.00 |  |      |  | 100.00 | 
|INFOSHINE           |  | OAKWOOD ASSOCIATES LIMITED (OAKWOOD)                                |  | Investment holding                             |  |                                               | 100.00 |  |      |  | 100.00 | 
|OAKWOOD             |  | HEJIAN TECHNOLOGY (SUZHOU) CO., LTD. (HEJIAN)                       |  | Sales and manufacturing of integrated circuits |  |                                               | 100.00 |  |      |  | 100.00 | 
|HEJIAN              |  | UNITEDDS SEMICONDUCTOR (SHANDONG) CO., LTD.                         |  | Integrated circuits design services            |  |                                               | 100.00 |  |      |  | 100.00 | 
|HEJIAN              |  | UNITED SEMICONDUCTOR (XIAMEN) CO., LTD. (USC) (Note A)              |  | Sales and manufacturing of integrated circuits |  |                                               |       |  |      |  | 33.33  | 



|Note A: | Pursuant to the agreement entered into with Xiamen Municipal Peoples Government and FUJIAN ELECTRONICS & INFORMATION GROUP as described in Note 9(4), the Company injected RMB 0.6 billion in USC in January 2015
to acquire control of its Board of Directors. The Company included USC in consolidation beginning from January 2015.
|------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (4) | Business Combinations and Goodwill
| | --- | ----------------------------------

Business combinations are accounted for using the
acquisition method. The consideration transferred, the identifiable assets acquired and liabilities assumed are measured at the acquisition date fair value. For the components of non-controlling interests in the acquiree that are present
ownership interests and entitle their holders to a proportionate share of the entitys net assets in the event of liquidation, the acquirer measures at either fair value or at the non-controlling interests proportionate share of the
acquirees identifiable net assets. Acquisition-related costs are expensed as incurred and are classified under administrative expenses.



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When the Company acquires a business, it assesses the assets acquired and liabilities assumed for
appropriate classification and designation in accordance with the contractual terms, economic circumstances and pertinent conditions as at the acquisition date. This includes the separation of embedded derivatives in host contracts held by the
acquiree.

If the business combination is achieved in stages, the acquisition date fair value of the acquirers previously held equity
interest in the acquiree is remeasured at fair value as at the acquisition date through profit or loss.

Any contingent consideration to be
transferred by the acquirer will be recognized at fair value at the acquisition date. Subsequent changes to the fair value of the contingent consideration, which is deemed to be an asset or liability, will be recognized in accordance with IAS
39, either in profit or loss or other comprehensive income. If the contingent consideration is classified as equity, it should not be remeasured until it is finally settled within equity.

Goodwill is initially measured at cost, being the excess of the aggregate of the consideration transferred and the amount recognized for
non-controlling interest over the net identifiable assets acquired and liabilities assumed. If the fair value of the net assets acquired is in excess of the aggregate consideration transferred and non-controlling interests, the difference is
recognized as a gain on bargain purchase.

After initial recognition, goodwill is measured at cost less any accumulated impairment losses.
For the purpose of impairment testing, goodwill acquired in a business combination is, from the acquisition date, allocated to each cash-generating unit (CGU) that is expected to benefit from the combination, irrespective of whether other assets or
liabilities of the acquiree are assigned to those units. Each unit or groups of units to which the goodwill is so allocated represents the lowest level within the Company at which the goodwill is monitored for internal management purposes and cannot
be larger than an operating segment before aggregation.

Where goodwill forms part of a CGU and part of the operation within that unit is
disposed, the goodwill associated with the operation disposed is included in the carrying amount of the operation. Goodwill disposed in this circumstance is measured based on the relative values of the operation disposed and the portion of the
CGU retained.



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| | (5) | Foreign Currency Transactions
| | --- | -----------------------------

The Companys consolidated financial statements are
presented in New Taiwan Dollars (NTD), which is also the parent companys functional currency. Each entity in the Company determines its own functional currency and items included in the financial statements of each entity are measured using
that functional currency.

Transactions in foreign currencies are initially recorded by the Companys entities at their respective
functional currency rates prevailing at the transaction date. Monetary assets and liabilities denominated in foreign currencies are translated at the functional currency closing rates of exchange at the reporting date. Non-monetary items
measured at fair value in foreign currencies are translated using the exchange rates at the date when the fair value is determined. Non-monetary items that are measured at historical cost in foreign currencies are translated using the exchange
rates as at the dates of the initial transactions.

All exchange differences arising on the settlement of monetary items or on translating
monetary items are taken to profit or loss in the period in which they arise except for the following:



| | a. | Exchange differences arising from foreign currency borrowings for an acquisition of a qualifying asset to the extent that they are regarded as an adjustment to interest costs are included in the borrowing costs that are
eligible for capitalization.
| | -- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | b. | Foreign currency derivatives within the scope of IAS 39 are accounted for based on the accounting policy for financial instruments.
| | -- | -----------------------------------------------------------------------------------------------------------------------------------



| | c. | Exchange differences arising on a monetary item that is part of a reporting entitys net investment in a foreign operation are recognized initially in other comprehensive income and reclassified from equity to
profit or loss upon disposal of such investment.
| | -- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

When a gain or loss on a non-monetary item is recognized in other
comprehensive income, any exchange component of that gain or loss is recognized in other comprehensive income. When a gain or loss on a non-monetary item is recognized in profit or loss, any exchange component of that gain or loss is recognized in
profit or loss.



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| | (6) | Translation of Foreign Currency Financial Statements
| | --- | ----------------------------------------------------

The assets and liabilities of
foreign operations are translated into NTD at the closing rate of exchange prevailing at the reporting date and their income and expenses are translated at an average exchange rate for the period. The exchange differences arising on the
translation are recognized in other comprehensive income. On disposal of a foreign operation, the cumulative amount of the exchange differences relating to that foreign operation, recognized in other comprehensive income and accumulated in the
separate component of equity, is reclassified from equity to profit or loss when the gain or loss on disposal is recognized.

On partial
disposal of a subsidiary that includes a foreign operation that does not result in a loss of control, the proportionate share of the cumulative amount of the exchange differences recognized in other comprehensive income is re-attributed to the
non-controlling interests in that foreign operation. On partial disposal of an associate or a joint venture that includes a foreign operation that does not result in a loss of significant influence or joint control, only the proportionate share
of the cumulative amount of the exchange differences recognized in other comprehensive income is reclassified to profit or loss.

Any
goodwill and any fair value adjustments to the carrying amounts of assets and liabilities arising from the acquisition of a foreign operation are treated as assets and liabilities of the foreign operation and expressed in its functional currency.



| | (7) | Convenience Translation into U.S. Dollars
| | --- | -----------------------------------------

Translations of amount from NTD into U.S.
dollars (USD) for the readers convenience were calculated at the rate of USD1.00 to NTD32.79 on December 31, 2015 released by Board of Governors of the Federal Reserve System. No representation is made that the NTD amounts could have
been, or could be, converted into USD at this rate.



| | (8) | Current and Non-Current Distinction
| | --- | -----------------------------------

An asset is classified as current when:



| | a. | the Company expects to realize the asset, or intends to sell or consume it, in its normal operating cycle;
| | -- | ----------------------------------------------------------------------------------------------------------



| | b. | the Company holds the asset primarily for the purpose of trading;
| | -- | -----------------------------------------------------------------



| | c. | the Company expects to realize the asset within twelve months after the reporting period; or
| | -- | --------------------------------------------------------------------------------------------



| | d. | the asset is cash or a cash equivalent unless the asset is restricted from being exchanged or used to settle a liability for at least twelve months after the reporting period.
| | -- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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All other assets are classified as non-current.

A liability is classified as current when:



| | a. | the Company expects to settle the liability in normal operating cycle;
| | -- | ----------------------------------------------------------------------



| | b. | the Company holds the liability primarily for the purpose of trading;
| | -- | ---------------------------------------------------------------------



| | c. | the liability is due to be settled within twelve months after the reporting period; or
| | -- | --------------------------------------------------------------------------------------



| | d. | the Company does not have an unconditional right to defer settlement of the liability for at least twelve months after the reporting date. Terms of a liability that could, at the option of the counterparty, result
in its settlement by the issue of equity instruments do not affect its classification.
| | -- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

All other liabilities are classified
as non-current.



| | (9) | Cash Equivalents
| | --- | ----------------

Cash equivalents are short-term, highly liquid investments that are
readily convertible to known amounts of cash and with maturity dates that do not present significant risks on changes in value resulting from changes in interest rates, including time deposits with original maturities of three months or less and
repurchase agreements collateralized by government bonds and corporate bonds.



| | (10) | Financial Instruments
| | ---- | ---------------------

Financial assets and financial liabilities are recognized when
the Company becomes a party to the contractual provisions of the instrument.

The Company determines the classification of its financial
assets at initial recognition. In accordance with IAS 39, financial assets of the Company are classified as financial assets at fair value through profit or loss, available-for-sale financial assets, held-to-maturity financial assets and notes,
accounts and other receivables.

Purchase or sale of financial assets and liabilities are recognized using trade date accounting. All
financial assets are recognized initially at fair value plus, in the case of investments not at fair value through profit or loss, directly attributable costs. Financial assets carried at fair value through profit or loss are initially recognized at
fair value, and transaction costs are expensed in the income statement.



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Financial Assets



| | a. | Classification and subsequent measurement
| | -- | -----------------------------------------



| | i. | Financial assets at fair value through profit or loss
| | -- | -----------------------------------------------------

Financial assets at fair value through
profit or loss are comprised of financial assets held for trading and financial assets designated upon initial recognition at fair value through profit or loss.

Financial assets acquired for the purpose of selling or repurchasing in the near term, and derivative financial instruments that are not
designated as hedging instruments in hedge accounting are classified as financial assets at fair value through profit or loss. Financial assets at fair value through profit or loss are measured at fair value with changes in fair value
recognized in profit or loss.



| | ii. | Available-for-sale financial assets
| | --- | -----------------------------------

Available-for-sale investments are those non-derivative
financial assets that are designated as available-for-sale or are not classified as financial assets at fair value through profit or loss, held-to-maturity financial assets, or loans and receivables.

Available-for-sale financial investments are subsequently measured at fair value. Other than impairment losses and foreign exchange gains
and losses arising from monetary financial assets which are recognized in profit or loss, subsequent measurement of available-for-sale equity instrument financial assets are recognized in other comprehensive income until the investment is
derecognized, at which time the cumulative gain or loss is recognized in profit or loss. If equity instrument investments do not have quoted prices in an active market and their fair value cannot be reliably measured, then they are classified
as financial assets measured at cost on the balance sheet.



| | iii. | Held-to-maturity financial assets
| | ---- | ---------------------------------

Non-derivative financial assets with fixed or determinable
payments and fixed maturities are classified as held-to-maturity when the Company has positive intention and ability to hold them to maturity.



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After initial measurement, held-to-maturity financial assets are measured at amortized cost
using the effective interest rate (EIR) method, less impairment. Amortized cost is calculated by taking into account any discount or premium on acquisition and fees or transaction costs. The EIR method amortization and impairment, if any, is
recognized in profit or loss.



| | iv. | Notes, accounts and other receivables
| | --- | -------------------------------------

Notes and accounts receivable are creditors
rights as a result of sales of goods or services. Other receivables are any receivable not classified as notes and accounts receivable. Notes, accounts and other receivables are initially measured and recognized at their fair values and
subsequently measured at amortized cost using the EIR method, less impairment. If the effect of discounting is immaterial, the short term notes, accounts and other receivables are measured at their nominal amount.



| | b. | Derecognition of financial assets
| | -- | ---------------------------------

A financial asset is derecognized when:



| | i. | the contractual rights to receive cash flows from the asset have expired;
| | -- | -------------------------------------------------------------------------



| | ii. | the Company has transferred assets and substantially all the risks and rewards of the asset have been transferred; or
| | --- | ---------------------------------------------------------------------------------------------------------------------



| | iii. | the Company has neither transferred nor retained substantially all the risks and rewards of the asset, but has transferred control of the asset.
| | ---- | ------------------------------------------------------------------------------------------------------------------------------------------------

On derecognition of a financial asset in its entirety, the difference between the carrying amount and the consideration received or to be
received including any cumulative gain or loss that had been recognized in other comprehensive income is recognized in profit or loss.

If
the transferred asset is part of a larger financial asset and the part transferred qualifies for derecognition in its entirety, the Company allocates the previous carrying amount of the larger financial asset between the part that continues to be
recognized and the part that is derecognized, based on the relative fair values of those parts on the date of the transfer. The difference between the carrying amount allocated to the part derecognized and the sum of the consideration received
for the part derecognized and any cumulative gain or loss allocated that had been recognized in other comprehensive income, is recognized in profit or loss. A cumulative gain or loss that had been recognized in other comprehensive income is
allocated between the part that continues to be recognized and the part that is derecognized, based on the relative fair values of those parts.



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| | c. | Impairment policy
| | -- | -----------------

The carrying amount of a financial asset is reduced as a result of
impairment, except for accounts receivable for which the carrying amount is reduced through use of an allowance account. When an account receivable is deemed to be uncollectible, it is written off from the allowance account.



| | i. | Notes, accounts and other receivables
| | -- | -------------------------------------

The Company first assesses at each reporting date
whether objective evidence of impairment exists for notes, accounts and other receivables that are individually significant. If there is objective evidence that an impairment loss has occurred, the amount of impairment loss is assessed
individually. For notes, accounts and other receivables other than those mentioned above, the Company groups those assets with similar credit risk characteristics and collectively assess them for impairment. If, in a subsequent period, the
amount of the impairment loss decreases, and the decrease can be related objectively to an event occurring after the impairment was recognized, the previously recognized impairment loss is reversed and recognized through profit or loss. The
reversal shall not result in a carrying amount of notes, accounts and other receivables that exceeds what the amortized cost would have been had the impairment not been recognized at the date the impairment is reversed.



| | ii. | Other financial assets
| | --- | ----------------------

The Company assesses, at each reporting date, whether there is
objective evidence that a financial asset or a group of financial assets is impaired. A financial asset or a group of financial assets is deemed to be impaired if, and only if, there is objective evidence of impairment as a result of one or
more loss events that has occurred since the initial recognition of the asset (an incurred loss event) and that loss event has an impact on the estimated future cash flows of the individual financial asset or a group of financial assets.



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For the financial assets carried at amortized cost, the amount of the impairment loss is
measured as the difference between the carrying amount and the present value of estimated future cash flows, discounted at the original effective interest rate. For equity investments classified as available-for-sale, objective evidence of an
impairment would include a significant or prolonged decline in the fair value of the investment below its cost. When there is objective evidence of an impairment for available-for-sale equity securities, the full amount of the losses previously
recognized in other comprehensive income is reclassified to profit or loss. Impairment losses recognized on equity investments cannot be reversed through profit or loss. Any subsequent increases in their fair value after impairment are
recognized in other comprehensive income.

Financial Liabilities



| | a. | Classification and subsequent measurement
| | -- | -----------------------------------------

The Company classifies the instrument issued as a
financial liability or an equity instrument in accordance with the substance of the contractual arrangement and the definitions of a financial liability and an equity instrument.



| | i. | Financial liabilities at fair value through profit or loss
| | -- | ----------------------------------------------------------

Financial liabilities at fair
value through profit or loss include financial liabilities held for trading and financial liabilities designated upon initial recognition as at fair value through profit or loss. Gains or losses on the subsequent measurement, including interest
paid, are recognized in profit or loss.



| | ii. | Financial liabilities carried at amortized cost
| | --- | -----------------------------------------------

Financial liabilities measured at amortized
cost include interest bearing loans and borrowings that are subsequently measured using the EIR method after initial recognition. Gains and losses are recognized in profit or loss when the liabilities are derecognized as well as through the EIR
method amortization process.

Amortized cost is calculated by taking into account any discount or premium on acquisition and fees or
transaction costs.



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| | b. | Derecognition of financial liabilities
| | -- | --------------------------------------

A financial liability is derecognized when the
obligation under the liability is discharged, cancelled or expires.

When an existing financial liability is replaced by another from the
same lender on substantially different terms, or the terms of an existing liability are substantially modified (whether or not attributable to the financial difficulty of the debtor), such an exchange or modification is treated as a derecognition of
the original liability and the recognition of a new liability, and the difference in the respective carrying amounts and the consideration paid, including any non-cash assets transferred or liabilities assumed, is recognized in profit or loss.



| | (11) | Inventories
| | ---- | -----------

Inventories are accounted for on a perpetual basis. Raw materials are
stated at actual purchase costs, while the work in process and finished goods are stated at standard costs and subsequently adjusted to weighted-average costs at the end of each month. The cost of work in progress and finished goods comprises raw
materials, direct labor, other direct costs and related production overheads. Allocation of fixed production overheads to the costs of conversion is based on the normal capacity of the production facilities. Cost associated with underutilized
capacity is expensed as incurred. Inventories are valued at the lower of cost and net realizable value item by item. Net realizable value is the estimated selling price in the ordinary course of business less the estimated costs of completion
and the estimated costs necessary to make the sale.



| | (12) | Non-current Assets Held for Sale (Disposal Group)
| | ---- | -------------------------------------------------

Non-current assets (disposal group)
are classified as held for sale if they are available for immediate sale in their present condition subject only to terms that are usual and customary for sales of such assets (disposal group) and that are highly probable to complete the sale within
one year from the date of classification. Non-current assets (disposal group) classified as held for sale are measured at the lower of their carrying amounts and fair values less costs to sell. Property, plant and equipment and intangible
assets once classified as held for sale are not depreciated or amortized.



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Impairment losses of non-current assets held for sale (disposal group) are recognized in the
income statement in the current period for the excess of the carrying amounts over fair values less costs to sell. Any subsequent increase in fair value less cost to sell an asset up to the cumulative impairment loss previously recognized in
accordance with the IAS 36, Impairment of Assets (IAS 36) would be recognized as a gain.



| | (13) | Investments Accounted For Under the Equity Method
| | ---- | -------------------------------------------------

The Companys investments in
associates and joint ventures are accounted for using the equity method other than those that meet the criteria to be classified as non-current assets held for sale.

An associate is an entity over which the Company has significant influence and that is neither a subsidiary nor a joint
venture. Significant influence is the power to participate in the financial and operating policy decisions of an entity, but is not control or joint control over those policies.

A joint venture is a type of joint arrangement whereby the Company that has joint control of the arrangement has rights to the net assets of
the joint venture. Joint control is the contractually agreed sharing of control of an arrangement where no single party controls the arrangement on its own, which exists only when decisions about the relevant activities require unanimous consent of
the parties sharing control.

Any difference between the acquisition cost and the Companys share of the net fair value of the
identifiable assets and liabilities of associates and joint ventures is accounted for as follows:



| | a. | Any excess of the acquisition cost over the Companys share of the net fair value of the identifiable assets and liabilities of an associate or a joint venture at the date of acquisition is recognized as goodwill
and is included in the carrying amount of the investment. Amortization of goodwill is not permitted.
| | -- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | b. | Any excess of the Companys share of the net fair value of the identifiable assets and liabilities of an associate or a joint venture over the acquisition cost, after reassessing the fair value, is recognized as a
gain in profit or loss on the acquisition date.
| | -- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Under the equity method, the investments in associates and joint ventures
are carried on the balance sheet at cost plus post acquisition changes in the Companys share of profit or loss and other comprehensive income of associates and joint ventures. The Companys share of changes in associates and joint
ventures profit or loss and other comprehensive income are recognized directly in profit or loss and other comprehensive income, respectively, of the Company. Distributions received from an associate or a joint venture reduce the carrying
amount of the investment. Any unrealized gains and losses resulting from transactions between the Company and the associate or the joint venture are eliminated to the extent of the Companys interest in the associate or the joint venture.



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Financial statements of associates and joint ventures are prepared for the same reporting period
as the Company. Where necessary, adjustments are made to bring the accounting policies in line with those of the Company.

Upon an
associates issuance of new shares, if the Company takes up more shares than its original proportionate holding while maintaining its significant influence over that associate, such increase would be accounted for as an acquisition of an
additional equity interest in the associate. Upon an associates issuance of new shares, if the Company does not take up proportionate shares and reduces its stockholding percentage while maintaining its significant influence over that
associate, the Company will treat the transaction as deemed disposal and reclassify to profit or loss the proportion of the gain or loss previously recognized in other comprehensive income relating to that reduction in ownership interest where
appropriate.

The Company ceases to use the equity method upon loss of significant influence over an associate. Any difference between
the carrying amount of the investment in an associate upon loss of significant influence and the fair value of the retained investment plus proceeds from disposal will be recognized in profit or loss. If an investment in an associate becomes an
investment in a joint venture or an investment in a joint venture becomes an investment in an associate, the Company continues to apply the equity method and does not remeasure the retained interest.

The Company determines at each reporting date whether there is any objective evidence that the investments in associates and joint ventures are
impaired. An impairment loss, being the difference between the recoverable amount of the associate and joint venture and its carrying amount, is recognized in profit or loss in the statement of comprehensive income and forms part of the
carrying amount of the investments.



| | (14) | Property, Plant and Equipment
| | ---- | -----------------------------

Property, plant and equipment is stated at cost, net of
accumulated depreciation and accumulated impairment losses, if any, and any borrowing costs incurred for long-term construction projects are capitalized if the recognition criteria are met. Significant renewals, improvements and major
inspections meeting the recognition criteria are treated as capital expenditures, and the carrying amounts of those replaced parts are derecognized. Maintenance and repairs are recognized in profit or loss as incurred. Any gain or loss arising from
derecognition of the assets is recognized in other operating income and expenses.



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Depreciation is calculated on a straight-line basis over the estimated economic lives. A
significant part of an item of property, plant and equipment which has a different useful life from the remainder of the item is depreciated separately.

The depreciation methods, useful lives and residual values for the assets are reviewed at each fiscal year end, and the differences resulted
from the previous estimation are recorded as changes in accounting estimates.

Except for land, which is not depreciated, the estimated
economic lives of the assets are as follows:



|                         |  |                                                    
|------------------------ |  | ---------------------------------------------------
|Buildings                |  | 20~56 years                                        
|Machinery and equipment  |  | 3~11 years                                         
|Transportation equipment |  | 5~7 years                                          
|Furniture and fixtures   |  | 1~9 years                                          
|Leasehold improvement    |  | The shorter of lease terms or economic useful lives



| | (15) | Intangible Assets
| | ---- | -----------------

Intangible assets acquired separately are measured on initial
recognition at cost. The cost of intangible assets acquired in a business combination is its fair value as at the date of acquisition. Following initial recognition, intangible assets are carried at cost less any accumulated amortization
and accumulated impairment losses, if any. Internally generated intangible assets which fail to meet the recognition criteria are not capitalized and the expenditures are reflected in profit or loss in the period incurred.

The useful lives of intangible assets are assessed as either finite or indefinite.

Intangible assets with finite lives are amortized over the useful economic life and assessed for impairment whenever there is an indication
that the intangible assets may be impaired. The amortization period and the amortization method for an intangible asset with a finite useful life are reviewed at least at the end of each fiscal year. Changes in the expected useful life or
the expected pattern of consumption of future economic benefits embodied in the asset is accounted for by changing the amortization period or method, as appropriate, and is treated as changes in accounting estimates.



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Intangible assets with indefinite useful lives are not amortized, but are tested for impairment
annually, either individually or at the CGU level. The assessment of indefinite life is reviewed annually to determine whether the indefinite life continues to be supportable. If not, the change in useful life from indefinite to finite is made
on a prospective basis.

Gains or losses arising from derecognition of an intangible asset are recognized in other operating income and
expenses.

Accounting policies of the Companys intangible assets are summarized as follows:



| | a. | Goodwill arising from business combination is not amortized, and is tested for impairment annually or more frequently if events or changes in circumstances suggest that the carrying amount may not be
recoverable. If an event occurs or circumstances change which indicates that the goodwill is impaired, an impairment loss is recognized. Goodwill impairment losses cannot be reversed once recognized.
| | -- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | b. | Software is amortized over 1~6 years on a straight-line basis.
| | -- | --------------------------------------------------------------



| | c. | Patent and technology license fee: Upon signing of contract and obtaining the right to intellectual property, any portion attributable to non-cancellable and mutually agreed future fixed license fees for patent and
technology is discounted and recognized as an intangible asset and related liability. The cost of the intangible asset is not revalued once determined on initial recognition, and is depreciated over the economic life (5~10 years) on a
straight-line basis. Interest expenses from the related liability are recognized and calculated based on the EIR method. Based on the timing of payments, the liability is classified as current and non-current.
| | -- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | d. | Others are mainly the intellectual property license fees, amortized over the shorter of the contract term or estimated economic life (3 years) of the related technology on a straight-line basis.
| | -- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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| | (16) | Impairment of Non-Financial Assets
| | ---- | ----------------------------------

The Company assesses at each reporting date whether
there is an indication that an asset in the scope of IAS 36 may be impaired. If any indication exists, the Company completes impairment testing for the CGU to which the individual assets belong. Where the carrying amount of an asset or CGU exceeds
its recoverable amount, the asset is considered impaired and is written down to its recoverable amount. The recoverable amount of an individual asset or a CGU is the higher of its fair value less costs to sell and its value in use. If
circumstances indicate that previously recognized impairment losses may no longer exist or may have decreased at each reporting date, the Company re-assesses the assets or CGUs recoverable amount. A previously recognized impairment loss
is reversed only if there has been an increase in the estimated service potential of an asset which in turn increases the recoverable amount since the last impairment loss was recognized. The reversal is limited so that the carrying amount of the
asset does not exceed its recoverable amount, nor exceed the carrying amount that would have been determined, net of depreciation or amortization, had no impairment loss been recognized for the asset in prior years.

A CGU, or group of CGU, to which goodwill has been allocated is tested for impairment annually at the same time every year, irrespective of
whether there is any indication of impairment. Where the carrying amount of a CGU (including the carrying amount of goodwill) exceeds its recoverable amount, the CGU is considered impaired. If an impairment loss is to be recognized, it is first
allocated to reduce the carrying amount of any goodwill allocated to the CGU (group of units), then to the other assets of the unit (group of units) pro rata on the basis of the carrying amount of each asset in the unit (group of
units). Impairment losses relating to goodwill cannot be reversed in future periods.

The recognition or reversal of impairment losses
is classified as other operating income and expenses.



| | (17) | Bonds
| | ---- | -----

Convertible bonds

UMC evaluates the terms of the convertible bonds issued to determine whether it contains both a liability and an equity
component. Furthermore, UMC assesses if the economic characteristics and risks of the put and call options embedded in the convertible bonds are closely related to the economic characteristics and risk of the host contract before separating the
equity element.



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For the liability component excluding the derivatives, its fair value is determined based on the
effective interest rate applied at that time by the market to instruments of comparable credit status. The liability component is classified as a financial liability measured at amortized cost using the EIR method before the instrument is
converted or settled. For the embedded derivative that is not closely related to the host contract, it is classified as a liability component and subsequently measured at fair value through profit or loss unless it qualifies as an equity
component. The equity component is recognized initially at the difference between the fair value of the compound financial instrument as a whole and the fair value of the liability component. Its carrying amount is not remeasured in the
subsequent accounting periods. If the convertible bond issued does not have an equity component, it is accounted for as a hybrid instrument in accordance with the requirements under IAS 39.

If the convertible bondholders exercise their conversion right before maturity, UMC shall adjust the carrying amount of the liability
component. The adjusted carrying amount of the liability component at conversion and the carrying amount of equity component are credited to common stock and additional paid-in capital - premiums. No gain or loss is recognized upon bond
conversion.

In addition, the liability component of convertible bonds is classified as a current liability if within 12 months the
bondholders may exercise the put right. After the put right expires, the liability component of the convertible bonds should be reclassified as a non-current liability if it meets the definition of a non-current liability in all other respects.

Exchangeable bonds

UMC
also has exchangeable bonds where the bondholders may exchange the bonds into ordinary shares of certain public entities which UMC holds as available-for-sale financial assets. When exchangeable bondholders exercise their right to exchange their
bonds for reference shares, the carrying amount of the bonds is offset against the carrying amount of the investments in reference shares and the related stockholders equity accounts, with the difference recognized as a gain or loss on
disposal of investments.

In accordance with IAS 39, if the economic characteristics and risks of the embedded call or put options are not
clearly and closely related to the host contract, the derivative financial instruments embedded in exchangeable bonds would be recognized separately as financial assets or liabilities at fair value through profit or loss.

Both the host contract and bifurcated embedded derivative financial instrument in exchangeable bonds are classified as current liabilities if
the bondholders have the right to demand settlement by exercising the exchange option of the bonds.



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| | (18) | Post-Employment Benefits
| | ---- | ------------------------

All regular employees are entitled to a defined benefit
pension plan that is managed by an independently administered pension fund committee. Fund assets are deposited under the committees name with the Bank of Taiwan and hence, not associated with the Company. Therefore, fund assets are not
to be included in the Companys consolidated financial statements. Pension benefits for employees of the overseas branch and subsidiaries are provided in accordance with the local regulations.

The Labor Pension Act of the R.O.C. (the Act), which adopts a defined contribution plan, became effective on July 1, 2005. Employees
eligible for the Labor Standards Law, a defined benefit plan, were allowed to elect either the pension calculation under the Act or continue to be subject to the pension calculation under the Labor Standards Law. Those employees that elected to
be subject to the Act will have their seniority achieved under the Labor Standards Law retained upon election of the Act, and the Company will make monthly contributions and recognize an expense of no less than 6% of these employees monthly
wages to the employees individual pension accounts. Overseas subsidiaries and branches make contributions to the respective benefit plans based on the specific percentage requirement of local regulations. A post-employment benefit plan
that is classified as a defined benefit plan is accounted for under the Projected Unit Credit Method to measure its obligations and costs based on actuarial assumptions. The Company recognizes all actuarial gains and losses in the periods which
they occur in other comprehensive income, which then are immediately recognized in retained earnings.



| | (19) | Treasury Stock
| | ---- | --------------

UMCs own equity instruments repurchased (treasury shares) are
recognized at repurchase cost and deducted from equity. Any difference between the carrying amount and the consideration is recognized in equity.



| | (20) | Share-Based Payment Transactions
| | ---- | --------------------------------

The cost of equity-settled transactions between the
Company and its employees is measured based on the fair value at the date on which they are granted. The fair value of the equity instruments is determined using an appropriate pricing model.



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The cost of equity-settled transactions is recognized, together with a corresponding increase in
other capital reserves in equity, over the periods in which the performance and/or service conditions are being fulfilled. The cumulative expense recognized for equity-settled transactions at each reporting date reflects the extent to which the
vesting period has passed and the Companys best estimate of the quantity of equity instruments that will ultimately vest. The charge to profit or loss for a period represents the movement in cumulative expense recognized between the
beginning and the end of that period.

No expense will be recognized for awards that do not ultimately vest, except for equity-settled
transactions for which vesting is conditional upon a market or non-vesting condition. These are treated as vested irrespective of whether the market or non-vesting condition is satisfied, provided that all other performance and/or service conditions
are satisfied.

Where the terms of an equity-settled transaction award are modified, the minimum expense recognized is the expense as if
the terms had not been modified, if the original terms of the award are met. An additional expense is recognized for any modification that increases the total fair value of the share-based payment transaction, or is otherwise beneficial to the
employee as measured at the date of modification.

Where an equity-settled award is cancelled, it is treated as if it fully vests on the
date of cancellation, and any expense not yet recognized for the award is recognized immediately. This includes any award where non-vesting conditions within the control of either the entity or the employee are not met. However, if a new
award substitutes for the cancelled award and is designated as a replacement award on the date that it is granted, the cancelled and new awards are treated as if they were a modification of the original award.

The dilutive effect of outstanding options is reflected as additional share dilution in the computation of diluted earnings per share.



| | (21) | Revenue Recognition
| | ---- | -------------------

Revenue is recognized to the extent that it is probable that the
economic benefits will flow to the Company and the revenue can be reliably measured. Revenue is measured at the fair value of the consideration received or receivable. The specific criteria described below must also be met before revenue
is recognized.



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Sales revenue

The Company manufactures semiconductors for creditworthy customers based on their design specifications, pursuant to manufacturing agreements
and/or purchase orders at contractual prices. The Company ships wafers mainly under the trade term, Free Carrier (FCA), through which the title and risk of loss for the wafers are transferred to the customers upon delivery to carriers approved
by the customers. Sales revenue is recognized at this point, having also fulfilled all of the following criteria pursuant to IAS 18, paragraph 14:



| | a. | the significant risks and rewards of ownership of the goods have been transferred to the customer;
| | -- | --------------------------------------------------------------------------------------------------



| | b. | neither continuing managerial involvement to the degree usually associated with ownership nor effective control over the goods sold have been retained;
| | -- | -------------------------------------------------------------------------------------------------------------------------------------------------------



| | c. | the amount of revenue can be measured reliably;
| | -- | -----------------------------------------------



| | d. | it is probable that the economic benefits associated with the transaction will flow to the entity; and
| | -- | ------------------------------------------------------------------------------------------------------



| | e. | the costs incurred or to be incurred in respect of the transaction can be measured reliably.
| | -- | --------------------------------------------------------------------------------------------

Sales revenue is measured at the fair value of the consideration received or receivable, net of sales returns and discounts, which are
estimated based on customer complaints, historical experience and other known factors. Sales returns and discounts are recorded in the same period in which sales are made.

Interest income

For
financial assets measured at amortized cost (including held-to-maturity financial assets) and financial assets at fair value through profit or loss, interest income is recorded using the effective interest rate and recognized in profit or loss.

Dividends

Revenue is
recognized when the Companys right to receive the dividends is established, which is generally when stockholders approve the dividend.



| | (22) | Income Tax
| | ---- | ----------

Income tax expense (benefit) is the aggregate amount of current income tax
and deferred income tax included in the determination of profit or loss for the period.



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Current income tax

Current income tax assets and liabilities for the current period and prior periods are measured using the tax rates and tax laws that have been
enacted or substantively enacted by the end of the reporting period. Current income tax relating to items recognized directly in other comprehensive income or equity is recognized in other comprehensive income or equity rather than profit or
loss.

Undistributed earnings, calculated based on Business Entity Accounting Act are subject to a 10% tax in accordance with the Income
Tax Law of the R.O.C. Accordingly, the undistributed tax impact of 10% is provided in the period the income is earned, assuming that no earnings are distributed. Any reduction in the liability will be recognized when the income is distributed upon
the stockholders approval in the subsequent year. Tax on undistributed earnings may be offset by the Companys available tax credits carried forward, where applicable. As such, the incremental tax accrued on undistributed earnings may be
offset by a corresponding reduction in deferred income tax assets, where applicable.

Deferred income tax

Deferred income tax is determined using the liability method on temporary differences between the tax bases of assets and liabilities and their
carrying amounts in financial statements at the reporting date.

Deferred tax liabilities are recognized for all taxable temporary
differences, except:



| | a. | When the deferred tax liability arises from the initial recognition of goodwill or of an asset or liability in a transaction that is not a business combination and, at the time of the transaction, affects neither the
accounting profit nor taxable profit or loss;
| | -- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | b. | In respect of taxable temporary differences associated with investments in subsidiaries, associates and joint ventures, when the timing of the reversal of the temporary differences can be controlled and it is probable
that the temporary differences will not be reversed in the foreseeable future.
| | -- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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Deferred tax assets are recognized for all deductible temporary differences, the carryforward of
unused tax losses and unused tax credits, to the extent that it is probable that future taxable profit will be available against which the deductible temporary differences and the carryforward of unused tax losses and unused tax credits can be
utilized, except:



| | a. | Where the deferred tax asset relating to the deductible temporary difference arises from the initial recognition of an asset or liability in a transaction that is not a business combination and, at the time of the
transaction, affects neither the accounting profit nor taxable profit or loss;
| | -- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | b. | In respect of deductible temporary differences associated with investments in subsidiaries, associates and joint ventures, deferred tax assets are recognized only to the extent that it is probable that the temporary
differences will reverse in the foreseeable future and taxable profit will be available against which the temporary differences can be utilized.
| | -- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Deferred tax assets and liabilities are measured at the tax rates that are expected to apply in the year when the asset is realized or the
liability is settled, based on tax rates and tax laws that have been enacted or substantively enacted at the reporting date. The measurement of deferred tax assets and liabilities reflects the tax consequences that would follow the manner in
which the Company expects, at the end of the reporting period, to recover or settle the carrying amount of its assets and liabilities. Deferred tax relating to items recognized outside profit or loss is not recognized in profit or loss but
rather in other comprehensive income or directly in equity. Deferred tax assets are reassessed and recognized at each reporting date. Unrecognized deferred tax assets are reassessed at each reporting date and are recognized to the extent
that it has become probable that future taxable profits will allow the deferred tax assets to be recovered.

Deferred tax assets and
liabilities offset each other, if a legally enforceable right exists to set off current income tax assets against current income tax liabilities, and the deferred taxes relate to the same taxable entity and the same taxation authority.

Tax benefits acquired as part of a business combination, but not satisfying the criteria for separate recognition at the acquisition date,
might be realized and recognized subsequently as follows:



| | a. | Acquired deferred tax benefits recognized with in the measured period that result from new information about facts and circumstances that existed at the acquisition date shall be applied to reduce the carrying amount of
any goodwill related to that acquisition. If the carrying amount of that goodwill is zero, any remaining deferred tax benefits shall be recognized in profit or loss;
| | -- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | b. | All other acquired deferred tax benefits realized shall be recognized in profit or loss, other comprehensive income or equity.
| | -- | ------------------------------------------------------------------------------------------------------------------------------



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| | (23) | Earnings per Share
| | ---- | ------------------

Earnings per share is computed according to IAS 33, Earnings
per Share. Basic earnings per share is computed by dividing net income by the weighted-average number of ordinary shares outstanding during the current reporting period. Diluted earnings per share is computed by taking basic earnings per share
into consideration plus additional ordinary shares that would have been outstanding if the dilutive share equivalents had been issued. Net income is also adjusted for interest and other income or expenses derived from any underlying dilutive share
equivalents. The weighted-average of outstanding shares is adjusted retroactively for stock dividends and employee stock bonus issues.



|5. | SIGNIFICANT ACCOUNTING JUDGMENTS, ESTIMATES AND ASSUMPTIONS
|-- | -----------------------------------------------------------

The preparation of the
Companys consolidated financial statements requires management to make judgments, estimates and assumptions that affect the reported amounts of revenues, expenses, assets, liabilities, the accompanying disclosures and the disclosure of
contingent liabilities. However, uncertainty about these assumptions and estimates could result in outcomes that require a material adjustment to the carrying amount of assets or liabilities affected in future periods.

The key assumptions concerning the future and other key sources of estimation for uncertainty at the reporting date that would have a
significant risk for a material adjustment to the carrying amounts of assets or liabilities within the next fiscal year are discussed below.

The Company bases its assumptions and estimates on information available when the consolidated financial statements were prepared. Existing
circumstances and assumptions about future developments, however, may change due to market changes or circumstances arising beyond the control of the Company. Such changes are reflected in the assumptions when they occur.



| | (1) | The Fair Value of Financial Instruments
| | --- | ---------------------------------------

Where the fair values of financial assets and
financial liabilities recorded in the balance sheet cannot be derived from active markets, they are determined using valuation techniques including income approach (for example, the discounted cash flows model) or the market approach. Changes
in assumptions about these factors could affect the reported fair value of the financial instruments. Please refer to Note 11 for more details.



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| | (2) | Inventories
| | --- | -----------

Inventories are valued at the lower of cost and net realizable value item by
item. Net realizable value is the estimated selling price in the ordinary course of business less the estimated costs of completion and the estimated costs necessary to make the sale. Please refer to Note 6(4). Costs of completion include
direct labor and overhead, including depreciation and maintenance of production equipment, indirect labor costs, indirect material costs, supplies, utilities and royalties that is expected to be incurred at normal production level. The Company
estimates normal production level taking into account loss of capacity resulting from planned maintenance, based on historical experience and current production capacity.



| | (3) | Post-Employment Benefits
| | --- | ------------------------

Cost of post-employment benefit pension plan and the present value of
the pension obligation are determined using actuarial valuations. An actuarial valuation involves making various assumptions which may differ from actual developments in the future. These include the determination of the discount rate,
future salary increases and mortality rates. Due to the complexity of the valuation, the underlying assumptions and its long-term nature, a defined benefit obligation is highly sensitive to changes in these assumptions. All assumptions are
reviewed at each reporting date. The assumptions used for measuring pension cost and the present value of the pension obligation are disclosed in Note 6(14).

In determining the appropriate discount rate, management considers the interest rates of the government bonds extrapolated from maturity
corresponding to the expected duration of the defined benefit obligation. As for the rate of future salary increase, management takes account of past experiences, comparisons within the industry and the geographical region, inflation and the
discount rate.



| | (4) | Impairment of Property, Plant and Equipment
| | --- | -------------------------------------------

At each reporting date or whenever events indicate
that the assets value has declined or significant changes in the market with an adverse effect have taken place, the Company assesses whether there is an indication that an asset in the scope of IAS 36 may be impaired. If any indication
exists, the Company completes impairment testing for the CGU to which the individual assets belong. Where the carrying amount of an asset or CGU exceeds its recoverable amount, the asset is considered impaired and is written down to its recoverable
amount. The recoverable amount of an individual asset or CGU is the higher of fair value less costs of disposal and its value in use. The fair value less costs of disposal is based on best information available to reflect the amount that an
entity could obtain from the disposal of the asset in an orderly transaction between market participants, after deducting the costs of disposal. The value in use is measured at the net present value of the future cash flows the entity expects to
derive from the asset or CGU. Cash flow projection involves subjective judgments and estimates which include the estimated useful lives of property, plant and equipment, capacity that generates future cash flows, capacity of physical output,
potential fluctuations of economic cycle in the industry and the Companys operating situation.



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| | (5) | Income Tax
| | --- | ----------

Uncertainties exist with respect to the interpretation of complex tax regulations,
changes in tax laws, and the amount and timing of future taxable income. The Company establishes provisions, based on reasonable estimates, for possible consequences of audits by the tax authorities of the respective countries in which it
operates. The amount of such provisions is based on various factors, such as experience of previous tax audits and different interpretations of tax regulations made by the taxable entity and the responsible tax authority. Such differences
of interpretation may arise on a wide variety of issues depending on the conditions prevailing in the respective domicile of the Company.

Deferred tax assets are recognized for all carryforward of unused tax losses, tax credits and deductible temporary differences to the extent
that it is probable that future taxable profit will be available or there are sufficient taxable temporary differences against which the unused tax losses, unused tax credits or deductible temporary differences can be utilized. The amount of
deferred tax assets determined to be recognized is based upon the likely timing and the level of future taxable profits and taxable temporary differences. Please refer to Note 6(22) for more details on unrecognized deferred tax assets.



|6. | CONTENTS OF SIGNIFICANT ACCOUNTS
|-- | --------------------------------



| | (1) | Cash and Cash Equivalents
| | --- | -------------------------



|                                                                       |  |                    |            |  |                |   |            | 
|---------------------------------------------------------------------- |  | ------------------ | ---------- |  | -------------- | - | ---------- | 
|                                                                       |  | As of December 31, |           
|                                                                       |  | 2014               |            |  | 2015           |  
|                                                                       |  | NT$                |            |  | NT$            |  
|                                                                       |  | (In Thousands)     |            |  | (In Thousands) |  
|Cash on hand                                                           |  | $                  | 3,878      |  |                | $ | 3,943      | 
|Checking and savings accounts                                          |  |                    | 10,389,664 |  |                |   | 14,464,203 | 
|Time deposits                                                          |  |                    | 30,782,070 |  |                |   | 33,962,629 | 
|Repurchase agreements collateralized by government and corporate bonds |  |                    | 4,525,723  |  |                |   | 4,859,658  | 
|                                                                       |  |                    |            |  |                |   |            | 
|Total                                                                  |  | $                  | 45,701,335 |  |                | $ | 53,290,433 | 
|                                                                       |  |                    |            |  |                |   |            | 



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##### Table of Contents

Please refer to the consolidated statements of cash flows for the reconciliation of the balances
of cash and cash equivalents on the consolidated statements of cash flows and the consolidated balance sheets.



| | (2) | Financial Assets at Fair Value through Profit or Loss
| | --- | -----------------------------------------------------



|                                                                 |  |                    |         |  |                |   |         | 
|---------------------------------------------------------------- |  | ------------------ | ------- |  | -------------- | - | ------- | 
|                                                                 |  | As of December 31, |        
|                                                                 |  | 2014               |         |  | 2015           |  
|                                                                 |  | NT$                |         |  | NT$            |  
|                                                                 |  | (In Thousands)     |         |  | (In Thousands) |  
|Designated financial assets at fair value through profit or loss |  |                    |         |  |                |   |         | 
|Convertible bonds                                                |  | $                  | 150,550 |  |                | $ | 295,708 | 
|                                                                 |  |                    |         |  |                |   |         | 
|                                                                 |  |                   
|Financial assets held for trading                                |  |                    |         |  |                |   |         | 
|Listed stocks                                                    |  |                    | 246,183 |  |                |   | 258,055 | 
|Corporate bonds                                                  |  |                    | 388,628 |  |                |   | 192,080 | 
|Forward exchange contracts                                       |  |                    |        |  |                |   | 1,008   | 
|                                                                 |  |                    |         |  |                |   |         | 
|Subtotal                                                         |  |                    | 634,811 |  |                |   | 451,143 | 
|                                                                 |  |                    |         |  |                |   |         | 
|Total                                                            |  | $                  | 785,361 |  |                | $ | 746,851 | 
|                                                                 |  |                    |         |  |                |   |         | 
|                                                                 |  |                   
|Current                                                          |  | $                  | 740,129 |  |                | $ | 664,918 | 
|Noncurrent                                                       |  |                    | 45,232  |  |                |   | 81,933  | 
|                                                                 |  |                    |         |  |                |   |         | 
|Total                                                            |  | $                  | 785,361 |  |                | $ | 746,851 | 
|                                                                 |  |                    |         |  |                |   |         | 



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| | (3) | Accounts Receivable, Net
| | --- | ------------------------



|                                                |  |                    |            |   |                |   |            |  
|----------------------------------------------- |  | ------------------ | ---------- | - | -------------- | - | ---------- | -
|                                                |  | As of December 31, |           
|                                                |  | 2014               |            |   | 2015           |  
|                                                |  | NT$                |            |   | NT$            |  
|                                                |  | (In Thousands)     |            |   | (In Thousands) |  
|Accounts receivable                             |  | $                  | 23,307,624 |   |                | $ | 20,253,481 |  
|Less: allowance for sales returns and discounts |  |                    | (828,029   | ) |                |   | (1,103,139 | )
|Less: allowance for doubtful accounts           |  |                    | (272,324   | ) |                |   | (90,568    | )
|                                                |  |                    |            |   |                |   |            |  
|Net                                             |  | $                  | 22,207,271 |   |                | $ | 19,059,774 |  
|                                                |  |                    |            |   |                |   |            |  

Aging analysis of accounts receivable, net:



|                              |  |                    |            |  |                |   |            | 
|----------------------------- |  | ------------------ | ---------- |  | -------------- | - | ---------- | 
|                              |  | As of December 31, |           
|                              |  | 2014               |            |  | 2015           |  
|                              |  | NT$                |            |  | NT$            |  
|                              |  | (In Thousands)     |            |  | (In Thousands) |  
|Neither past due nor impaired |  | $                  | 17,067,173 |  |                | $ | 15,643,254 | 
|                              |  |                    |            |  |                |   |            | 
|Past due but not impaired:    |  |                    |            |  |                |   |            | 
|£ 30 days                     |  |                    | 4,409,411  |  |                |   | 2,497,133  | 
|31 to 60 days                 |  |                    | 313,494    |  |                |   | 652,241    | 
|61 to 90 days                 |  |                    | 230,086    |  |                |   | 213,367    | 
|91 to 120 days                |  |                    | 32,858     |  |                |   | 38,597     | 
|> 120 days                    |  |                    | 154,249    |  |                |   | 15,182     | 
|                              |  |                    |            |  |                |   |            | 
|Subtotal                      |  |                    | 5,140,098  |  |                |   | 3,416,520  | 
|                              |  |                    |            |  |                |   |            | 
|Total                         |  | $                  | 22,207,271 |  |                | $ | 19,059,774 | 
|                              |  |                    |            |  |                |   |            | 

Movement on allowance for individually evaluated doubtful accounts:



|                          |  |                                  |          |   |                |   |          |  
|------------------------- |  | -------------------------------- | -------- | - | -------------- | - | -------- | -
|                          |  | For the years ended December 31, |         
|                          |  | 2014                             |          |   | 2015           |  
|                          |  | NT$                              |          |   | NT$            |  
|                          |  | (In Thousands)                   |          |   | (In Thousands) |  
|Beginning balance         |  | $                                | 574,421  |   |                | $ | 272,324  |  
|Net charge for the period |  |                                  | 116,789  |   |                |   | (181,756 | )
|Reclassification          |  |                                  | (418,886 | ) |                |   |         |  
|                          |  |                                  |          |   |                |   |          |  
|Ending balance            |  | $                                | 272,324  |   |                | $ | 90,568   |  
|                          |  |                                  |          |   |                |   |          |  



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The terms for third party domestic sales were month-end 30~60 days, while the
collection periods for third party overseas sales were net 30~60 days.

The impairment losses assessed individually as of December 31,
2014 and 2015 primarily resulted from the financial difficulties of the counter trading parties and the amounts recognized were the difference between the carrying amount of the accounts receivable and the present value of expected collectable
amounts. The Company has no collateral with respect to those accounts receivables.



| | (4) | Inventories, Net
| | --- | ----------------



|                         |  |                    |            |  |                |   |            | 
|------------------------ |  | ------------------ | ---------- |  | -------------- | - | ---------- | 
|                         |  | As of December 31, |           
|                         |  | 2014               |            |  | 2015           |  
|                         |  | NT$                |            |  | NT$            |  
|                         |  | (In Thousands)     |            |  | (In Thousands) |  
|Raw materials            |  | $                  | 2,136,306  |  |                | $ | 2,522,906  | 
|Supplies and spare parts |  |                    | 1,627,687  |  |                |   | 2,044,550  | 
|Work in process          |  |                    | 10,204,855 |  |                |   | 11,025,222 | 
|Finished goods           |  |                    | 1,273,384  |  |                |   | 2,048,707  | 
|                         |  |                    |            |  |                |   |            | 
|Total                    |  | $                  | 15,242,232 |  |                | $ | 17,641,385 | 
|                         |  |                    |            |  |                |   |            | 



| | a. | For the years ended December 31, 2013, 2014 and 2015, the Company recognized NT$97,675 million, NT$105,320 million and NT$109,782 million, respectively, in operating costs, of which NT$974 million and NT$330 million in
2013 and 2014, respectively, were related to gains recognized when the circumstances that caused the net realizable value of inventory to be lower than its cost no longer existed and NT$574 million loss in 2015 was as a result of the net realized
value of inventory being lower than its cost.
| | -- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | b. | No inventories were pledged as of December 31, 2014 and 2015.
| | -- | -------------------------------------------------------------



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##### Table of Contents

| | (5) | Available-For-Sale Financial Assets, Non-Current
| | --- | ------------------------------------------------



|                    |  |                    |            |  |                |   |            | 
|------------------- |  | ------------------ | ---------- |  | -------------- | - | ---------- | 
|                    |  | As of December 31, |           
|                    |  | 2014               |            |  | 2015           |  
|                    |  | NT$                |            |  | NT$            |  
|                    |  | (In Thousands)     |            |  | (In Thousands) |  
|Common stocks       |  | $                  | 23,510,084 |  |                | $ | 21,586,850 | 
|Preferred stocks    |  |                    | 781,148    |  |                |   | 1,166,256  | 
|Depositary receipts |  |                    |           |  |                |   | 196,560    | 
|Funds               |  |                    | 70,872     |  |                |   | 851,020    | 
|                    |  |                    |            |  |                |   |            | 
|Total               |  | $                  | 24,362,104 |  |                | $ | 23,800,686 | 
|                    |  |                    |            |  |                |   |            | 



| | (6) | Financial Assets Measured at Cost, Non-Current
| | --- | ----------------------------------------------



|                 |  |                    |           |  |                |   |           | 
|---------------- |  | ------------------ | --------- |  | -------------- | - | --------- | 
|                 |  | As of December 31, |          
|                 |  | 2014               |           |  | 2015           |  
|                 |  | NT$                |           |  | NT$            |  
|                 |  | (In Thousands)     |           |  | (In Thousands) |  
|Common stocks    |  | $                  | 602,429   |  |                | $ | 598,295   | 
|Preferred stocks |  |                    | 3,100,211 |  |                |   | 3,160,427 | 
|Funds            |  |                    | 130,366   |  |                |   | 129,587   | 
|                 |  |                    |           |  |                |   |           | 
|Total            |  | $                  | 3,833,006 |  |                | $ | 3,888,309 | 
|                 |  |                    |           |  |                |   |           | 

Since these financial assets mostly consist of non-publicly traded stocks and private venture funds, for which
the fair value cannot be reliably measured due to lack of sufficient financial information available, the Company measures these financial assets at cost.



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##### Table of Contents

| | (7) | Investments Accounted For Under the Equity Method
| | --- | -------------------------------------------------



| | a. | Details of investments accounted for under the equity method are as follows:
| | -- | ----------------------------------------------------------------------------



|                                                                     |  |                    |           |  |                                        |  |       |                |  |   |                                        |  |  |  |       | 
|-------------------------------------------------------------------- |  | ------------------ | --------- |  | -------------------------------------- |  | ----- | -------------- |  | - | -------------------------------------- |  |  |  | ----- | 
|                                                                     |  | As of December 31, |          
|                                                                     |  | 2014               |           |  | 2015                                   | 
|Investee companies                                                   |  | Amount             |           |  | Percentage ofownership orvoting rights |  |       | Amount         |  |   | Percentage ofownership orvoting rights | 
|                                                                     |  | NT$                |           |  |                                        |  |       | NT$            |  |   |                                        | 
|                                                                     |  | (In Thousands)     |           |  |                                        |  |       | (In Thousands) |  |   |                                        | 
|Listed company                                                       |  |                    |           |  |                                        |  |       |                |  |   |                                        |  |  |  |       | 
|FARADAY TECHNOLOGY CORP. (FARADAY) (Note A)                          |  | $                  |          |  |                                        |  |      |                |  | $ | 1,793,203                              |  |  |  | 13.94 | 
|                                                                     |  |                    |           | 
|Unlisted companies                                                   |  |                    |           |  |                                        |  |       |                |  |   |                                        |  |  |  |       | 
|SHANDONG HUAHONG ENERGY INVEST CO., INC. (SHANDONG HUAHONG) (Note B) |  |                    | 731,565   |  |                                        |  | 50.00 |                |  |   | 680,374                                |  |  |  | 50.00 | 
|WINAICO SOLAR PROJEKT 1 GMBH (Note B)                                |  |                    | 35,532    |  |                                        |  | 50.00 |                |  |   | 32,737                                 |  |  |  | 50.00 | 
|LIST EARN ENTERPRISE INC.                                            |  |                    | 10,660    |  |                                        |  | 49.00 |                |  |   | 10,486                                 |  |  |  | 49.00 | 
|MTIC HOLDINGS PTE. LTD.                                              |  |                    | 105,872   |  |                                        |  | 45.44 |                |  |   | 81,342                                 |  |  |  | 45.44 | 
|YUNG LI INVESTMENTS, INC.                                            |  |                    | 211,739   |  |                                        |  | 45.16 |                |  |   | 317,294                                |  |  |  | 45.16 | 
|MEGA MISSION LIMITED PARTNERSHIP                                     |  |                    | 1,860,202 |  |                                        |  | 45.00 |                |  |   | 1,913,134                              |  |  |  | 45.00 | 
|WINAICO IMMOBILIEN GMBH (Note B)                                     |  |                    | 256,064   |  |                                        |  | 44.78 |                |  |   | 233,713                                |  |  |  | 44.78 | 
|UNITECH CAPITAL INC.                                                 |  |                    | 682,191   |  |                                        |  | 42.00 |                |  |   | 532,186                                |  |  |  | 42.00 | 
|HSUN CHIEH INVESTMENT CO., LTD.                                      |  |                    | 1,328,051 |  |                                        |  | 36.49 |                |  |   | 1,197,976                              |  |  |  | 36.49 | 
|YANN YUAN INVESTMENT CO., LTD.                                       |  |                    |          |  |                                        |  |      |                |  |   | 2,299,914                              |  |  |  | 31.94 | 
|CTC CAPITAL PARTNERS I, L.P.                                         |  |                    | 183,681   |  |                                        |  | 31.40 |                |  |   | 221,607                                |  |  |  | 31.40 | 
|VSENSE CO., LTD.                                                     |  |                    |          |  |                                        |  |      |                |  |   | 101,281                                |  |  |  | 28.63 | 
|UNITED LED CORPORATION HONG KONG LIMITED                             |  |                    | 518,495   |  |                                        |  | 29.03 |                |  |   | 478,112                                |  |  |  | 25.14 | 
|ACHIEVE MADE INTERNATIONAL LTD.                                      |  |                    | 121,567   |  |                                        |  | 23.32 |                |  |   | 116,321                                |  |  |  | 23.32 | 
|CLIENTRON CORP.                                                      |  |                    |          |  |                                        |  |      |                |  |   | 234,273                                |  |  |  | 20.28 | 
|TRANSLINK CAPITAL PARTNERS I, L.P. (Note C)                          |  |                    | 124,249   |  |                                        |  | 10.38 |                |  |   | 95,082                                 |  |  |  | 10.38 | 
|MOS ART PACK CORP. (MAP) (Note D)                                    |  |                    | 238,373   |  |                                        |  | 72.98 |                |  |   |                                       |  |  |  |      | 
|UNITED LIGHTING OPTO-ELECTRONIC INC. (UNITED LIGHTING) (Note E)      |  |                    | 9,586     |  |                                        |  | 55.25 |                |  |   |                                       |  |  |  |      | 
|TRANSLINK CAPITAL PARTNERS III, L.P. (Note C)                        |  |                    | 199,443   |  |                                        |  | 29.29 |                |  |   |                                       |  |  |  |      | 
|                                                                     |  |                    |           |  |                                        |  |       |                |  |   |                                        |  |  |  |       | 
|Total                                                                |  | $                  | 6,617,270 |  |                                        |  |       |                |  | $ | 10,339,035                             |  |  |  |       | 
|                                                                     |  |                    |           |  |                                        |  |       |                |  |   |                                        |  |  |  |       | 



Note A:

Beginning from June 2015, the Company accounts for its investment in FARADAY as an associate given the fact that the Company obtained the ability to exercise significant influence over FARADAY through representation on its board of
directors. As a result, the investment was revalued to fair value and reclassified out of the available-for-sale category as an investment in associate accounted for under the equity method. Fair value remeasurement that was previously
recognized in other comprehensive income was reclassified to profit or loss in the current period.




F-46



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Note B:

SHANDONG HUAHONG, WINAICO SOLAR PROJEKT 1 GMBH and WINAICO IMMOBILIEN GMBH are joint ventures to the Company.Note C:

The Company follows international accounting practices in equity accounting for limited partnerships and uses the equity method to account for these investees.Note D:

On March 10, 2011, MAP filed for liquidation through a decision at its stockholders meeting. The liquidation was completed on December 3, 2015.Note E:

On June 19, 2012, UNITED LIGHTING filed for liquidation through a decision at its stockholders meeting. The liquidation was completed on November 23, 2015.


The carrying amount of investments accounted for using the equity method for which there are published
price quotations amounted to nil and NT$1,793 million, as of December 31, 2014 and 2015, respectively. The fair value of these investments were nil and NT$1,534 million, as of December 31, 2014 and 2015, respectively.

None of the aforementioned associates and joint ventures were pledged.



| | b. | Financial information of associates and joint ventures:
| | -- | -------------------------------------------------------

There is no individually significant
associate or joint venture for the Company. For individually immaterial associates and joint ventures, the following tables summarized the amount recognized by the Company at its share of those associates and joint ventures
separately. When an associate or a joint venture is a foreign operation, and the functional currency of the foreign entity is different from the Company, an exchange difference arising from translation of the foreign entity will be recognized
in other comprehensive income (loss). Such exchange differences recognized in other comprehensive income (loss) in the financial statements for the years ended December 31, 2013, 2014 and 2015 were NT$83 million, NT$138 million and NT$46
million, respectively, which were not included in the following table.



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| | (i) | The aggregate amount of the Companys share of its all individually immaterial associates that are accounted for using the equity method was as follows:
| | --- | --------------------------------------------------------------------------------------------------------------------------------------------------------



|                                  |  |                                  |         |  |                |   |         |                |  |   |          |  
|--------------------------------- |  | -------------------------------- | ------- |  | -------------- | - | ------- | -------------- |  | - | -------- | -
|                                  |  | For the years ended December 31, |        
|                                  |  | 2013                             |         |  | 2014           |   |         | 2015           | 
|                                  |  | NT$                              |         |  | NT$            |   |         | NT$            | 
|                                  |  | (In Thousands)                   |         |  | (In Thousands) |   |         | (In Thousands) | 
|Profit from continuing operations |  | $                                | 732,380 |  |                | $ | 79,407  |                |  | $ | 44,834   |  
|Other comprehensive income (loss) |  |                                  | 250,070 |  |                |   | 139,030 |                |  |   | (360,618 | )
|                                  |  |                                  |         |  |                |   |         |                |  |   |          |  
|Total comprehensive income (loss) |  | $                                | 982,450 |  |                | $ | 218,437 |                |  | $ | (315,784 | )
|                                  |  |                                  |         |  |                |   |         |                |  |   |          |  



| | (ii) | The aggregate amount of the Companys share of its all individually immaterial joint ventures that are accounted for using the equity method was as follows:
| | ---- | ------------------------------------------------------------------------------------------------------------------------------------------------------------



|                                  |  |                                  |         |   |                |   |         |                |  |   |         |  
|--------------------------------- |  | -------------------------------- | ------- | - | -------------- | - | ------- | -------------- |  | - | ------- | -
|                                  |  | For the years ended December 31, |        
|                                  |  | 2013                             |         |   | 2014           |   |         | 2015           | 
|                                  |  | NT$                              |         |   | NT$            |   |         | NT$            | 
|                                  |  | (In Thousands)                   |         |   | (In Thousands) |   |         | (In Thousands) | 
|Loss from continuing operations   |  | $                                | (34,449 | ) |                | $ | (42,228 | )              |  | $ | (40,140 | )
|Other comprehensive income (loss) |  |                                  |        |   |                |   |        |                |  |   |        |  
|                                  |  |                                  |         |   |                |   |         |                |  |   |         |  
|Total comprehensive loss          |  | $                                | (34,449 | ) |                | $ | (42,228 | )              |  | $ | (40,140 | )
|                                  |  |                                  |         |   |                |   |         |                |  |   |         |  



| | (8) | Property, Plant and Equipment
| | --- | -----------------------------



|                                                           |  |                    |             |  |                |   |             | 
|---------------------------------------------------------- |  | ------------------ | ----------- |  | -------------- | - | ----------- | 
|                                                           |  | As of December 31, |            
|                                                           |  | 2014               |             |  | 2015           |  
|                                                           |  | NT$                |             |  | NT$            |  
|                                                           |  | (In Thousands)     |             |  | (In Thousands) |  
|Land                                                       |  | $                  | 1,314,402   |  |                | $ | 1,314,402   | 
|Buildings                                                  |  |                    | 12,955,815  |  |                |   | 17,271,051  | 
|Machinery and equipment                                    |  |                    | 119,069,687 |  |                |   | 124,628,140 | 
|Transportation equipment                                   |  |                    | 14,630      |  |                |   | 17,627      | 
|Furniture and fixtures                                     |  |                    | 942,520     |  |                |   | 1,288,250   | 
|Leasehold improvement                                      |  |                    | 12,210      |  |                |   | 9,814       | 
|Construction in progress and equipment awaiting inspection |  |                    | 32,380,979  |  |                |   | 41,904,111  | 
|                                                           |  |                    |             |  |                |   |             | 
|Net                                                        |  | $                  | 166,690,243 |  |                | $ | 186,433,395 | 
|                                                           |  |                    |             |  |                |   |             | 



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##### Table of Contents

Cost:



|                                 |  |                |           |   |                |   |            |                        |  |   |                         |   |  |                       |        |   |                      |   |           |                                                        |  |   |                |   |  |   |             |   |  |   |             |  
|-------------------------------- |  | -------------- | --------- | - | -------------- | - | ---------- | ---------------------- |  | - | ----------------------- | - |  | --------------------- | ------ | - | -------------------- | - | --------- | ------------------------------------------------------ |  | - | -------------- | - |  | - | ----------- | - |  | - | ----------- | -
|                                 |  | Land           |           |   | Buildings      |   |            | Machineryand equipment |  |   | Transportationequipment |   |  | Furnitureand fixtures |        |   | Leaseholdimprovement |   |           | Constructionin progressand equipmentawaitinginspection |  |   | Total          |  
|                                 |  | NT$            |           |   | NT$            |   |            | NT$                    |  |   | NT$                     |   |  | NT$                   |        |   | NT$                  |   |           | NT$                                                    |  |   | NT$            |  
|                                 |  | (In Thousands) |           |   | (In Thousands) |   |            | (In Thousands)         |  |   | (In Thousands)          |   |  | (In Thousands)        |        |   | (In Thousands)       |   |           | (In Thousands)                                         |  |   | (In Thousands) |  
|As of January 1, 2014            |  | $              | 1,925,691 |   |                | $ | 25,846,909 |                        |  | $ | 630,966,729             |   |  | $                     | 66,554 |   |                      | $ | 5,285,463 |                                                        |  | $ | 1,800,921      |   |  | $ | 19,368,388  |   |  | $ | 685,260,655 |  
|Additions                        |  |                |          |   |                |   |           |                        |  |   |                        |   |  |                       |       |   |                      |   |          |                                                        |  |   |               |   |  |   | 40,655,242  |   |  |   | 40,655,242  |  
|Disposals                        |  |                | (10,626   | ) |                |   |           |                        |  |   | (3,109,952              | ) |  |                       | (1,535 | ) |                      |   | (50,820   | )                                                      |  |   | (2,880         | ) |  |   |            |   |  |   | (3,175,813  | )
|Transfers and reclassifications  |  |                | (600,663  | ) |                |   | (294,360   | )                      |  |   | 27,538,645              |   |  |                       | 1,946  |   |                      |   | 101,944   |                                                        |  |   | (1,732,413     | ) |  |   | (28,055,788 | ) |  |   | (3,040,689  | )
|Exchange effect                  |  |                |          |   |                |   | 284,999    |                        |  |   | 7,095,006               |   |  |                       | 718    |   |                      |   | 23,322    |                                                        |  |   | 2,652          |   |  |   | 413,137     |   |  |   | 7,819,834   |  
|                                 |  |                |           |   |                |   |            |                        |  |   |                         |   |  |                       |        |   |                      |   |           |                                                        |  |   |                |   |  |   |             |   |  |   |             |  
|As of December 31, 2014          |  | $              | 1,314,402 |   |                | $ | 25,837,548 |                        |  | $ | 662,490,428             |   |  | $                     | 67,683 |   |                      | $ | 5,359,909 |                                                        |  | $ | 68,280         |   |  | $ | 32,380,979  |   |  | $ | 727,519,229 |  
|                                 |  |                |           |   |                |   |            |                        |  |   |                         |   |  |                       |        |   |                      |   |           |                                                        |  |   |                |   |  |   |             |   |  |   |             |  
|                                 |  |                |           |   |                |   |            |                       
|                                 |  | Land           |           |   | Buildings      |   |            | Machineryand equipment |  |   | Transportationequipment |   |  | Furnitureand fixtures |        |   | Leaseholdimprovement |   |           | Constructionin progressand equipmentawaitinginspection |  |   | Total          |  
|                                 |  | NT$            |           |   | NT$            |   |            | NT$                    |  |   | NT$                     |   |  | NT$                   |        |   | NT$                  |   |           | NT$                                                    |  |   | NT$            |  
|                                 |  | (In Thousands) |           |   | (In Thousands) |   |            | (In Thousands)         |  |   | (In Thousands)          |   |  | (In Thousands)        |        |   | (In Thousands)       |   |           | (In Thousands)                                         |  |   | (In Thousands) |  
|As of January 1, 2015            |  | $              | 1,314,402 |   |                | $ | 25,837,548 |                        |  | $ | 662,490,428             |   |  | $                     | 67,683 |   |                      | $ | 5,359,909 |                                                        |  | $ | 68,280         |   |  | $ | 32,380,979  |   |  | $ | 727,519,229 |  
|Additions                        |  |                |          |   |                |   |           |                        |  |   |                        |   |  |                       |       |   |                      |   |          |                                                        |  |   |               |   |  |   | 57,837,663  |   |  |   | 57,837,663  |  
|Acquired in business combination |  |                |          |   |                |   |           |                        |  |   | 123,124                 |   |  |                       |       |   |                      |   | 31,009    |                                                        |  |   |               |   |  |   | 210         |   |  |   | 154,343     |  
|Disposals                        |  |                |          |   |                |   |           |                        |  |   | (2,834,152              | ) |  |                       | (1,647 | ) |                      |   | (47,209   | )                                                      |  |   |               |   |  |   |            |   |  |   | (2,883,008  | )
|Transfers and reclassifications  |  |                |          |   |                |   | 5,364,106  |                        |  |   | 47,374,249              |   |  |                       | 7,804  |   |                      |   | 702,498   |                                                        |  |   | 731            |   |  |   | (48,284,824 | ) |  |   | 5,164,564   |  
|Exchange effect                  |  |                |          |   |                |   | 195,219    |                        |  |   | 5,397,419               |   |  |                       | 411    |   |                      |   | 17,939    |                                                        |  |   | 1,420          |   |  |   | (29,917     | ) |  |   | 5,582,491   |  
|                                 |  |                |           |   |                |   |            |                        |  |   |                         |   |  |                       |        |   |                      |   |           |                                                        |  |   |                |   |  |   |             |   |  |   |             |  
|As of December 31, 2015          |  | $              | 1,314,402 |   |                | $ | 31,396,873 |                        |  | $ | 712,551,068             |   |  | $                     | 74,251 |   |                      | $ | 6,064,146 |                                                        |  | $ | 70,431         |   |  | $ | 41,904,111  |   |  | $ | 793,375,282 |  
|                                 |  |                |           |   |                |   |            |                        |  |   |                         |   |  |                       |        |   |                      |   |           |                                                        |  |   |                |   |  |   |             |   |  |   |             |  

Accumulated Depreciation and Impairment:



|                                |  |                |   |  |                |   |            |                        |  |   |                         |   |  |                       |        |   |                      |   |           |                                                        |  |   |                |   |  |   |   |  |  |   |             |  
|------------------------------- |  | -------------- | - |  | -------------- | - | ---------- | ---------------------- |  | - | ----------------------- | - |  | --------------------- | ------ | - | -------------------- | - | --------- | ------------------------------------------------------ |  | - | -------------- | - |  | - | - |  |  | - | ----------- | -
|                                |  | Land           |   |  | Buildings      |   |            | Machineryand equipment |  |   | Transportationequipment |   |  | Furnitureand fixtures |        |   | Leaseholdimprovement |   |           | Constructionin progressand equipmentawaitinginspection |  |   | Total          |  
|                                |  | NT$            |   |  | NT$            |   |            | NT$                    |  |   | NT$                     |   |  | NT$                   |        |   | NT$                  |   |           | NT$                                                    |  |   | NT$            |  
|                                |  | (In Thousands) |   |  | (In Thousands) |   |            | (In Thousands)         |  |   | (In Thousands)          |   |  | (In Thousands)        |        |   | (In Thousands)       |   |           | (In Thousands)                                         |  |   | (In Thousands) |  
|As of January 1, 2014           |  | $              |  |  |                | $ | 12,167,522 |                        |  | $ | 505,795,974             |   |  | $                     | 51,507 |   |                      | $ | 4,136,774 |                                                        |  | $ | 755,978        |   |  | $ |  |  |  | $ | 522,907,755 |  
|Depreciation                    |  |                |  |  |                |   | 1,177,362  |                        |  |   | 36,948,450              |   |  |                       | 4,492  |   |                      |   | 355,951   |                                                        |  |   | 299,321        |   |  |   |  |  |  |   | 38,785,576  |  
|Impairment loss                 |  |                |  |  |                |   |           |                        |  |   | 579,222                 |   |  |                       |       |   |                      |   | 17,456    |                                                        |  |   |               |   |  |   |  |  |  |   | 596,678     |  
|Disposals                       |  |                |  |  |                |   |           |                        |  |   | (2,868,400              | ) |  |                       | (1,535 | ) |                      |   | (49,499   | )                                                      |  |   | (2,880         | ) |  |   |  |  |  |   | (2,922,314  | )
|Transfers and reclassifications |  |                |  |  |                |   | (526,946   | )                      |  |   | (2,840,427              | ) |  |                       | (1,883 | ) |                      |   | (63,864   | )                                                      |  |   | (998,792       | ) |  |   |  |  |  |   | (4,431,912  | )
|Exchange effect                 |  |                |  |  |                |   | 63,795     |                        |  |   | 5,805,922               |   |  |                       | 472    |   |                      |   | 20,571    |                                                        |  |   | 2,443          |   |  |   |  |  |  |   | 5,893,203   |  
|                                |  |                |   |  |                |   |            |                        |  |   |                         |   |  |                       |        |   |                      |   |           |                                                        |  |   |                |   |  |   |   |  |  |   |             |  
|As of December 31, 2014         |  | $              |  |  |                | $ | 12,881,733 |                        |  | $ | 543,420,741             |   |  | $                     | 53,053 |   |                      | $ | 4,417,389 |                                                        |  | $ | 56,070         |   |  | $ |  |  |  | $ | 560,828,986 |  
|                                |  |                |   |  |                |   |            |                        |  |   |                         |   |  |                       |        |   |                      |   |           |                                                        |  |   |                |   |  |   |   |  |  |   |             |  



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##### Table of Contents

|                                |  |                |   |  |                |   |            |                        |  |   |                         |   |  |                       |        |   |                      |   |           |                                                        |  |   |                |  |  |   |   |  |  |   |             |  
|------------------------------- |  | -------------- | - |  | -------------- | - | ---------- | ---------------------- |  | - | ----------------------- | - |  | --------------------- | ------ | - | -------------------- | - | --------- | ------------------------------------------------------ |  | - | -------------- |  |  | - | - |  |  | - | ----------- | -
|                                |  | Land           |   |  | Buildings      |   |            | Machineryand equipment |  |   | Transportationequipment |   |  | Furnitureand fixtures |        |   | Leaseholdimprovement |   |           | Constructionin progressand equipmentawaitinginspection |  |   | Total          | 
|                                |  | NT$            |   |  | NT$            |   |            | NT$                    |  |   | NT$                     |   |  | NT$                   |        |   | NT$                  |   |           | NT$                                                    |  |   | NT$            | 
|                                |  | (In Thousands) |   |  | (In Thousands) |   |            | (In Thousands)         |  |   | (In Thousands)          |   |  | (In Thousands)        |        |   | (In Thousands)       |   |           | (In Thousands)                                         |  |   | (In Thousands) | 
|As of January 1, 2015           |  | $              |  |  |                | $ | 12,881,733 |                        |  | $ | 543,420,741             |   |  | $                     | 53,053 |   |                      | $ | 4,417,389 |                                                        |  | $ | 56,070         |  |  | $ |  |  |  | $ | 560,828,986 |  
|Depreciation                    |  |                |  |  |                |   | 1,188,944  |                        |  |   | 41,923,305              |   |  |                       | 4,725  |   |                      |   | 353,005   |                                                        |  |   | 3,029          |  |  |   |  |  |  |   | 43,473,008  |  
|Impairment loss                 |  |                |  |  |                |   |           |                        |  |   | 1,003,230               |   |  |                       |       |   |                      |   | 17,780    |                                                        |  |   |               |  |  |   |  |  |  |   | 1,021,010   |  
|Disposals                       |  |                |  |  |                |   |           |                        |  |   | (2,782,911              | ) |  |                       | (1,454 | ) |                      |   | (47,063   | )                                                      |  |   |               |  |  |   |  |  |  |   | (2,831,428  | )
|Transfers and reclassifications |  |                |  |  |                |   | (305       | )                      |  |   | 1,380                   |   |  |                       |       |   |                      |   | 20,542    |                                                        |  |   |               |  |  |   |  |  |  |   | 21,617      |  
|Exchange effect                 |  |                |  |  |                |   | 55,450     |                        |  |   | 4,357,183               |   |  |                       | 300    |   |                      |   | 14,243    |                                                        |  |   | 1,518          |  |  |   |  |  |  |   | 4,428,694   |  
|                                |  |                |   |  |                |   |            |                        |  |   |                         |   |  |                       |        |   |                      |   |           |                                                        |  |   |                |  |  |   |   |  |  |   |             |  
|As of December 31, 2015         |  | $              |  |  |                | $ | 14,125,822 |                        |  | $ | 587,922,928             |   |  | $                     | 56,624 |   |                      | $ | 4,775,896 |                                                        |  | $ | 60,617         |  |  | $ |  |  |  | $ | 606,941,887 |  
|                                |  |                |   |  |                |   |            |                        |  |   |                         |   |  |                       |        |   |                      |   |           |                                                        |  |   |                |  |  |   |   |  |  |   |             |  

For the years ended December 31, 2014 and 2015, the Company identified indicators of impairment at certain
subsidiaries due to its net operating profit being lower than expected. The Company determined that certain property, plant and equipment would not generate the expected future cash flows. The impairment test revealed that the total carrying
amount of these assets was greater than their total recoverable amount, determined on the basis of value in use, using the present value of future cash flows the Company expects to derive from operating these assets. After considering the
relevant objective evidence, the Company recorded an impairment loss of NT$597 million and NT$795 million at discount rates of 12.6% and 13.0% for the years ended December 31, 2014 and 2015, respectively, all of which came from new business segment.

Please refer to Note 8 for property, plant and equipment pledged as collateral.



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##### Table of Contents

The amounts of total interest expense before capitalization of borrowing costs were NT$803
million, NT$992 million and NT$867 million for the years ended December 31, 2013, 2014 and 2015, respectively. Details of capitalized borrowing costs are as follows:



|                           |  |                                  |             |  |                |   |             |                |  |   |             | 
|-------------------------- |  | -------------------------------- | ----------- |  | -------------- | - | ----------- | -------------- |  | - | ----------- | 
|                           |  | For the years ended December 31, |            
|                           |  | 2013                             |             |  | 2014           |   |             | 2015           | 
|                           |  | NT$                              |             |  | NT$            |   |             | NT$            | 
|                           |  | (In Thousands)                   |             |  | (In Thousands) |   |             | (In Thousands) | 
|Buildings                  |  | $                                | 43,199      |  |                | $ | 85,104      |                |  | $ | 69,258      | 
|Machinery and equipment    |  |                                  | 163,206     |  |                |   | 218,282     |                |  |   | 308,805     | 
|Others                     |  |                                  | 30          |  |                |   | 1,651       |                |  |   | 17,506      | 
|                           |  |                                  |             |  |                |   |             |                |  |   |             | 
|Total interest capitalized |  | $                                | 206,435     |  |                | $ | 305,037     |                |  | $ | 395,569     | 
|                           |  |                                  |             |  |                |   |             |                |  |   |             | 
|                           |  |                                  |            
|Interest rates applied     |  |                                  | 0.19%~2.28% |  |                |   | 1.33%~2.21% |                |  |   | 1.35%~2.10% | 
|                           |  |                                  |             |  |                |   |             |                |  |   |             | 



| | (9) | Intangible Assets
| | --- | -----------------



|                                    |  |                    |           |  |                |   |           | 
|----------------------------------- |  | ------------------ | --------- |  | -------------- | - | --------- | 
|                                    |  | As of December 31, |          
|                                    |  | 2014               |           |  | 2015           |  
|                                    |  | NT$                |           |  | NT$            |  
|                                    |  | (In Thousands)     |           |  | (In Thousands) |  
|Goodwill                            |  | $                  | 7,791     |  |                | $ | 15,188    | 
|Software                            |  |                    | 215,998   |  |                |   | 377,643   | 
|Patents and technology license fees |  |                    | 3,021,788 |  |                |   | 2,871,308 | 
|Others                              |  |                    | 1,287,361 |  |                |   | 1,239,949 | 
|                                    |  |                    |           |  |                |   |           | 
|Net                                 |  | $                  | 4,532,938 |  |                | $ | 4,504,088 | 
|                                    |  |                    |           |  |                |   |           | 

Cost:



|                        |  |                |         |   |                |   |          |                                   |  |   |                |   |  |                |           |   |  |   |           |  
|----------------------- |  | -------------- | ------- | - | -------------- | - | -------- | --------------------------------- |  | - | -------------- | - |  | -------------- | --------- | - |  | - | --------- | -
|                        |  | Goodwill       |         |   | Software       |   |          | Patents andtechnologylicense fees |  |   | Others         |   |  | Total          |          
|                        |  | NT$            |         |   | NT$            |   |          | NT$                               |  |   | NT$            |   |  | NT$            |          
|                        |  | (In Thousands) |         |   | (In Thousands) |   |          | (In Thousands)                    |  |   | (In Thousands) |   |  | (In Thousands) |          
|As of January 1, 2014   |  | $              | 50,863  |   |                | $ | 432,462  |                                   |  | $ | 4,155,667      |   |  | $              | 2,110,088 |   |  | $ | 6,749,080 |  
|Additions               |  |                |        |   |                |   |         |                                   |  |   | 8,666          |   |  |                | 1,220,421 |   |  |   | 1,229,087 |  
|Disposals               |  |                |        |   |                |   | (130,165 | )                                 |  |   |               |   |  |                | (363,593  | ) |  |   | (493,758  | )
|Reclassifications       |  |                | (43,072 | ) |                |   | 185,462  |                                   |  |   | (287           | ) |  |                | (62,409   | ) |  |   | 79,694    |  
|Exchange effect         |  |                |        |   |                |   | 2,985    |                                   |  |   | 65,698         |   |  |                | (8        | ) |  |   | 68,675    |  
|                        |  |                |         |   |                |   |          |                                   |  |   |                |   |  |                |           |   |  |   |           |  
|As of December 31, 2014 |  | $              | 7,791   |   |                | $ | 490,744  |                                   |  | $ | 4,229,744      |   |  | $              | 2,904,499 |   |  | $ | 7,632,778 |  
|                        |  |                |         |   |                |   |          |                                   |  |   |                |   |  |                |           |   |  |   |           |  



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##### Table of Contents

|                                 |  |                |        |  |                |   |          |                                   |  |   |                |   |  |                |           |   |  |   |           |  
|-------------------------------- |  | -------------- | ------ |  | -------------- | - | -------- | --------------------------------- |  | - | -------------- | - |  | -------------- | --------- | - |  | - | --------- | -
|                                 |  | Goodwill       |        |  | Software       |   |          | Patents andtechnologylicense fees |  |   | Others         |   |  | Total          |          
|                                 |  | NT$            |        |  | NT$            |   |          | NT$                               |  |   | NT$            |   |  | NT$            |          
|                                 |  | (In Thousands) |        |  | (In Thousands) |   |          | (In Thousands)                    |  |   | (In Thousands) |   |  | (In Thousands) |          
|As of January 1, 2015            |  | $              | 7,791  |  |                | $ | 490,744  |                                   |  | $ | 4,229,744      |   |  | $              | 2,904,499 |   |  | $ | 7,632,778 |  
|Additions                        |  |                |       |  |                |   | 1,173    |                                   |  |   | 263,847        |   |  |                | 1,061,083 |   |  |   | 1,326,103 |  
|Acquired in business combination |  |                | 7,397  |  |                |   | 330      |                                   |  |   | 11,023         |   |  |                |          |   |  |   | 18,750    |  
|Disposals                        |  |                |       |  |                |   | (148,140 | )                                 |  |   |               |   |  |                | (544,018  | ) |  |   | (692,158  | )
|Reclassifications                |  |                |       |  |                |   | 305,571  |                                   |  |   | (259           | ) |  |                |          |   |  |   | 305,312   |  
|Exchange effect                  |  |                |       |  |                |   | 3,220    |                                   |  |   | 42,393         |   |  |                | (7        | ) |  |   | 45,606    |  
|                                 |  |                |        |  |                |   |          |                                   |  |   |                |   |  |                |           |   |  |   |           |  
|As of December 31, 2015          |  | $              | 15,188 |  |                | $ | 652,898  |                                   |  | $ | 4,546,748      |   |  | $              | 3,421,557 |   |  | $ | 8,636,391 |  
|                                 |  |                |        |  |                |   |          |                                   |  |   |                |   |  |                |           |   |  |   |           |  

Accumulated Amortization and Impairment:



|                        |  |                |   |  |                |   |          |                                   |  |   |                |   |  |                |           |   |  |   |           |  
|----------------------- |  | -------------- | - |  | -------------- | - | -------- | --------------------------------- |  | - | -------------- | - |  | -------------- | --------- | - |  | - | --------- | -
|                        |  | Goodwill       |   |  | Software       |   |          | Patents andtechnologylicense fees |  |   | Others         |   |  | Total          |          
|                        |  | NT$            |   |  | NT$            |   |          | NT$                               |  |   | NT$            |   |  | NT$            |          
|                        |  | (In Thousands) |   |  | (In Thousands) |   |          | (In Thousands)                    |  |   | (In Thousands) |   |  | (In Thousands) |          
|As of January 1, 2014   |  | $              |  |  |                | $ | 259,210  |                                   |  | $ | 754,898        |   |  | $              | 995,325   |   |  | $ | 2,009,433 |  
|Amortization            |  |                |  |  |                |   | 142,963  |                                   |  |   | 438,518        |   |  |                | 1,047,392 |   |  |   | 1,628,873 |  
|Disposals               |  |                |  |  |                |   | (130,165 | )                                 |  |   |               |   |  |                | (363,593  | ) |  |   | (493,758  | )
|Reclassifications       |  |                |  |  |                |   | 1,398    |                                   |  |   | (32            | ) |  |                | (61,981   | ) |  |   | (60,615   | )
|Exchange effect         |  |                |  |  |                |   | 1,340    |                                   |  |   | 14,572         |   |  |                | (5        | ) |  |   | 15,907    |  
|                        |  |                |   |  |                |   |          |                                   |  |   |                |   |  |                |           |   |  |   |           |  
|As of December 31, 2014 |  | $              |  |  |                | $ | 274,746  |                                   |  | $ | 1,207,956      |   |  | $              | 1,617,138 |   |  | $ | 3,099,840 |  
|                        |  |                |   |  |                |   |          |                                   |  |   |                |   |  |                |           |   |  |   |           |  
|                        |  |                |   |  |               
|                        |  | Goodwill       |   |  | Software       |   |          | Patents andtechnologylicense fees |  |   | Others         |   |  | Total          |          
|                        |  | NT$            |   |  | NT$            |   |          | NT$                               |  |   | NT$            |   |  | NT$            |          
|                        |  | (In Thousands) |   |  | (In Thousands) |   |          | (In Thousands)                    |  |   | (In Thousands) |   |  | (In Thousands) |          
|As of January 1, 2015   |  | $              |  |  |                | $ | 274,746  |                                   |  | $ | 1,207,956      |   |  | $              | 1,617,138 |   |  | $ | 3,099,840 |  
|Amortization            |  |                |  |  |                |   | 146,652  |                                   |  |   | 452,183        |   |  |                | 1,108,492 |   |  |   | 1,707,327 |  
|Disposals               |  |                |  |  |                |   | (148,139 | )                                 |  |   |               |   |  |                | (544,018  | ) |  |   | (692,157  | )
|Exchange effect         |  |                |  |  |                |   | 1,996    |                                   |  |   | 15,301         |   |  |                | (4        | ) |  |   | 17,293    |  
|                        |  |                |   |  |                |   |          |                                   |  |   |                |   |  |                |           |   |  |   |           |  
|As of December 31, 2015 |  | $              |  |  |                | $ | 275,255  |                                   |  | $ | 1,675,440      |   |  | $              | 2,181,608 |   |  | $ | 4,132,303 |  
|                        |  |                |   |  |                |   |          |                                   |  |   |                |   |  |                |           |   |  |   |           |  



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##### Table of Contents

The amortization amounts of intangible assets are as follows:



|                  |  |                                  |           |  |                |   |           | 
|----------------- |  | -------------------------------- | --------- |  | -------------- | - | --------- | 
|                  |  | For the years ended December 31, |          
|                  |  | 2014                             |           |  | 2015           |  
|                  |  | NT$                              |           |  | NT$            |  
|                  |  | (In Thousands)                   |           |  | (In Thousands) |  
|Operating cost    |  | $                                | 521,588   |  |                | $ | 534,860   | 
|                  |  |                                  |           |  |                |   |           | 
|Operating expense |  | $                                | 1,107,285 |  |                | $ | 1,172,467 | 
|                  |  |                                  |           |  |                |   |           | 

Significant technology licenses obtained by the Company amounted to NT$2,858 million and NT$2,483 million as of
December 31, 2014 and 2015, respectively, which were included in the carrying amounts of patents and technology license fees. The remaining amortization periods as of December 31, 2014 and 2015 were 7~8 years and 6~7 years, respectively.



| | (10) | Short-Term Loans
| | ---- | ----------------



|                     |  |                    |           |  |                |   |           | 
|-------------------- |  | ------------------ | --------- |  | -------------- | - | --------- | 
|                     |  | As of December 31, |          
|                     |  | 2014               |           |  | 2015           |  
|                     |  | NT$                |           |  | NT$            |  
|                     |  | (In Thousands)     |           |  | (In Thousands) |  
|Unsecured bank loans |  | $                  | 6,250,754 |  |                | $ | 5,505,049 | 
|                     |  |                    |           |  |                |   |           | 



|                       |  |                                  |             |  |      |  |             |      |  |  |             | 
|---------------------- |  | -------------------------------- | ----------- |  | ---- |  | ----------- | ---- |  |  | ----------- | 
|                       |  | For the years ended December 31, |            
|                       |  | 2013                             |             |  | 2014 |  |             | 2015 | 
|Interest rates applied |  |                                  | 0.57%~4.38% |  |      |  | 0.57%~2.50% |      |  |  | 0.61%~4.85% | 
|                       |  |                                  |             |  |      |  |             |      |  |  |             | 



| | a. | The Companys unused short-term lines of credits amounted to NT$19,650 million and NT$35,863 million as of December 31, 2014 and 2015, respectively.
| | -- | ----------------------------------------------------------------------------------------------------------------------------------------------------



| | b. | Please refer to Note 8 for property, plant and equipment pledged as collateral for short-term loans.
| | -- | ----------------------------------------------------------------------------------------------------



| | (11) | Financial Liabilities at Fair Value through Profit or Loss, Current
| | ---- | -------------------------------------------------------------------



|                           |  |                    |        |  |                |   |     | 
|-------------------------- |  | ------------------ | ------ |  | -------------- | - | --- | 
|                           |  | As of December 31, |       
|                           |  | 2014               |        |  | 2015           |  
|                           |  | NT$                |        |  | NT$            |  
|                           |  | (In Thousands)     |        |  | (In Thousands) |  
|Forward exchange contracts |  | $                  | 42,354 |  |                | $ | 999 | 
|                           |  |                    |        |  |                |   |     | 



F-53



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##### Table of Contents

| | (12) | Bonds Payable
| | ---- | -------------



|                                    |  |                    |            |   |                |   |            |  
|----------------------------------- |  | ------------------ | ---------- | - | -------------- | - | ---------- | -
|                                    |  | As of December 31, |           
|                                    |  | 2014               |            |   | 2015           |  
|                                    |  | NT$                |            |   | NT$            |  
|                                    |  | (In Thousands)     |            |   | (In Thousands) |  
|Unsecured domestic bonds payable    |  | $                  | 25,000,000 |   |                | $ | 25,000,000 |  
|Unsecured convertible bonds payable |  |                    |           |   |                |   | 18,196,332 |  
|Less: Discounts on bonds payable    |  |                    | (22,180    | ) |                |   | (1,559,662 | )
|                                    |  |                    |            |   |                |   |            |  
|Total                               |  | $                  | 24,977,820 |   |                | $ | 41,636,670 |  
|                                    |  |                    |            |   |                |   |            |  



| | A. | On December 2, 2009, UMC issued SGX-ST listed zero coupon exchangeable bonds. The terms and conditions of the bonds are as follows:
| | -- | -----------------------------------------------------------------------------------------------------------------------------------



| | a. | Issue Amount: US$127.2 million
| | -- | ------------------------------



| | b. | Period: December 2, 2009 ~ December 2, 2014 (Maturity date)
| | -- | -----------------------------------------------------------



| | c. | Redemption:
| | -- | -----------



| | i. | UMC may redeem the bonds, in whole or in part, after 12 months of the issuance and prior to the maturity date, at the principal amount of the bonds with an interest calculated at the rate of -0.5% per annum (the Early
Redemption Price) if the closing price of the ordinary shares of Unimicron Technology Corporation (Unimicron) on the TWSE, translated into U.S. dollars at the prevailing exchange rate, for a period of 20 consecutive trading days, the last of which
occurs not more than 10 days prior to the date upon which notice of such redemption is published, is at least 130% of the exchange price then in effect translated into U.S. dollars at the rate of NTD 32.197=USD 1.00.
| | -- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | ii. | UMC may redeem the bonds, in whole, but not in part, at the Early Redemption Price if at least 90% in principal amount of the bonds has already been exchanged, redeemed or purchased and cancelled.
| | --- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | iii. | UMC may redeem all, but not part, of the bonds, at the Early Redemption Price at any time, in the event of certain changes in the R.O.C.s tax rules which would require UMC to gross up for payments of principal, or
to gross up for payments of interest or premium.
| | ---- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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##### Table of Contents

| | iv. | All, or any portion, of the bonds would be redeemable in U.S. dollars at the option of bondholders on December 2, 2011 at 99% of the principal amount.
| | --- | ------------------------------------------------------------------------------------------------------------------------------------------------------



| | v. | Bondholders have the right to require UMC to redeem all or any portion of the bonds at the Early Redemption Price if the ordinary shares of the exchanged securities are officially delisted on the TWSE for a period of
five consecutive trading days.
| | -- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | vi. | In the event that a change of control as defined in the indenture of the bonds occurs to UMC or Unimicron, the bondholders shall have the right to require UMC to redeem the bonds, in whole or in part, at the Early
Redemption Price.
| | --- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | d. | Terms of Exchange:
| | -- | ------------------



| | i. | Underlying Securities: Ordinary shares of Unimicron
| | -- | ---------------------------------------------------



| | ii. | Exchange Period: The bonds are exchangeable at any time on or after January 1, 2010 and prior to November 22, 2014, into Unimicron ordinary shares; provided, however, that if the exercise date falls within 5
business days from the beginning of, and during, any closed period, the right of the exchanging holder of the bonds to vote with respect to the shares it receives will be subject to certain restrictions.
| | --- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | iii. | Exchange Price and Adjustment: The exchange price was originally NT$51.1875 per share, determined on the basis of a fixed exchange rate of NTD 32.197=USD 1.00. The exchange price will be subject to adjustments upon
the occurrence of certain events set out in the indenture.
| | ---- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | e. | Redemption on the Maturity Date:
| | -- | --------------------------------

The bonds matured on December 2, 2014, and UMC redeemed the
bonds at 97.53% of the principal amount. The principal amount of the redeemed bonds was US$127.2 million.



| | B. | On December 2, 2009, UMC issued SGX-ST listed zero coupon exchangeable bonds. The terms and conditions of the bonds are as follows:
| | -- | -----------------------------------------------------------------------------------------------------------------------------------



| | a. | Issue Amount: US$80 million
| | -- | ---------------------------



| | b. | Period: December 2, 2009 ~ December 2, 2014 (Maturity date)
| | -- | -----------------------------------------------------------



| | c. | Redemption:
| | -- | -----------



| | i. | UMC may redeem the bonds, in whole or in part, after 12 months of the issuance and prior to the maturity date, at the principal amount of the bonds with an interest calculated at the rate of -0.5% per annum (the Early
Redemption Price) if the closing price of the ordinary shares of Novatek Microelectronics Corp., Ltd. (Novatek) on the TWSE, translated into U.S. dollars at the prevailing exchange rate, for a period of 20 consecutive trading days, the last of which
occurs not more than 10 days prior to the date upon which notice of such redemption is published, is at least 130% of the exchange price then in effect translated into U.S. dollars at the rate of NTD 32.197=USD 1.00.
| | -- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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##### Table of Contents

| | ii. | UMC may redeem the bonds, in whole, but not in part, at the Early Redemption Price if at least 90% in principal amount of the bonds has already been exchanged, redeemed or purchased and cancelled.
| | --- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | iii. | UMC may redeem all, but not part, of the bonds, at the Early Redemption Price at any time, in the event of certain changes in the R.O.C.s tax rules which would require UMC to gross up for payments of principal, or
to gross up for payments of interest or premium.
| | ---- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | iv. | All, or any portion, of the bonds would be redeemable in U.S. dollars at the option of bondholders on December 2, 2011 at 99% of the principal amount.
| | --- | ------------------------------------------------------------------------------------------------------------------------------------------------------



| | v. | Bondholders have the right to require UMC to redeem all or any portion of the bonds at the Early Redemption Price if the ordinary shares of the exchanged securities are officially delisted on the TWSE for a period of
five consecutive trading days.
| | -- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | vi. | In the event that a change of control as defined in the indenture of the bonds occurs to UMC or Novatek, the bondholders shall have the right to require UMC to redeem the bonds, in whole or in part, at the Early
Redemption Price.
| | --- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | d. | Terms of Exchange:
| | -- | ------------------



| | i. | Underlying Securities: Ordinary shares of Novatek
| | -- | -------------------------------------------------



| | ii. | Exchange Period: The bonds are exchangeable at any time on or after January 1, 2010 and prior to November 22, 2014, into Novatek ordinary shares; provided, however, that if the exercise date falls within 5 business days
from the beginning of, and during, any closed period, the right of the exchanging holder of the bonds to vote with respect to the shares it receives will be subject to certain restrictions.
| | --- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | iii. | Exchange Price and Adjustment: The exchange price was originally NT$108.58 per share, determined on the basis of a fixed exchange rate of NTD 32.197=USD 1.00. The exchange price will be subject to adjustments upon
the occurrence of certain events set out in the indenture.
| | ---- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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##### Table of Contents

| | e. | Exchange of the Bonds:
| | -- | ----------------------

As of December 31, 2013, certain bondholders have exercised their
rights to exchange their bonds with the total principal amount of US$77 million into Novatek shares. Gains from disposal of investments and gains from exchange of bonds from bondholders exercising exchange rights during the year ended December
31, 2013 amounted NT$1,137 million and were recognized as non-operating income and expenses.



| | f. | Early Redemption of the Bonds:
| | -- | ------------------------------

Since over 90% principal amount of the bonds has already been
exchanged, UMC redeemed the bonds in whole at the Early Redemption Price on July 22, 2013. The remaining principal amount of the redeemed bonds was US$3 million. UMC recognized a gain of NT$45 million from the redemption as non-operating income and
expenses.



| | C. | On May 24, 2011, UMC issued SGX-ST listed currency linked zero coupon convertible bonds. The terms and conditions of the bonds are as follows:
| | -- | ----------------------------------------------------------------------------------------------------------------------------------------------



| | a. | Issue Amount: US$500 million
| | -- | ----------------------------



| | b. | Period: May 24, 2011 ~ May 24, 2016 (Maturity date)
| | -- | ---------------------------------------------------



| | c. | Redemption:
| | -- | -----------



| | i. | UMC may redeem the bonds, in whole or in part, after 3 years of the issuance and prior to the maturity date, at the principal amount of the bonds with an interest calculated at the rate of -0.25% per annum (the Early
Redemption Amount) if the closing price of UMCs ADS on the New York Stock Exchange, for a period of 20 out of 30 consecutive ADS trading days, the last of which occurs not more than 5 ADS trading days prior to the date upon which notice of
such redemption is published, is at least 130% of the conversion price. The Early Redemption Price will be converted into NTD based on the Fixed Exchange Rate (NTD 28.846=USD 1.00), and this fixed NTD amount will be converted using the prevailing
rate at the time of redemption for payment in USD.
| | -- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | ii. | UMC may redeem the bonds, in whole, but not in part, at the Early Redemption Amount if at least 90% in principal amount of the bonds has already been converted, redeemed or repurchased and cancelled.
| | --- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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| | iii. | UMC may redeem all, but not part, of the bonds, at the Early Redemption Amount at any time, in the event of certain changes in the R.O.C.s tax rules which would require UMC to gross up for payments of principal,
or to gross up for payments of interest or premium.
| | ---- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | iv. | All or any portion of the bonds will be redeemable at Early Redemption Amount at the option of bondholders on May 24, 2014 at 99.25% of the principal amount.
| | --- | -------------------------------------------------------------------------------------------------------------------------------------------------------------



| | v. | Bondholders have the right to require UMC to redeem all of the bonds at the Early Redemption Amount if UMCs ADS cease to be listed or admitted for trading on the New York Stock Exchange, or UMCs ordinary
shares cease to be listed on the Taiwan Stock Exchange.
| | -- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | vi. | In the event that a change of control as defined in the indenture of the bonds occurs to UMC, the bondholders shall have the right to require UMC to redeem the bonds, in whole but not in part, at the Early Redemption
Amount.
| | --- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | d. | Terms of Conversion:
| | -- | --------------------



| | i. | Underlying Securities: ADS of UMC
| | -- | ---------------------------------



| | ii. | Conversion Period: The bonds are convertible at any time on or after July 4, 2011 and prior to May 14, 2016, into UMCs ADS; provided, however, that if the exercise date falls within 8 business days from the
beginning of, and during, any closed period, the right of the converting holder of the bonds to vote with respect to the ADS it receives will be subject to certain restrictions.
| | --- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | iii. | Conversion Price and Adjustment: The conversion price was originally USD 3.77 per ADS, determined on the basis of a Fixed Exchange Rate of NTD 28.846=USD 1.00. The conversion price will be subject to adjustments
upon the occurrence of certain events set out in the indenture.
| | ---- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | e. | Early Redemption of the Bonds:
| | -- | ------------------------------

UMC redeemed bonds with principal amount of US$324 million as
requested by investors on May 27, 2014. The associated convertible rights were deemed cancelled and the consideration paid for the early redemption was fully allocated to the liability components. UMC adjusted the carrying amount of the
liability components to reflect actual consideration paid and recognized a loss amount to NT$194 million as non-operating income and expenses. UMC reclassified cancelled convertible rights of NT$441 million from additional paid-in capital
 stock options to additional paid-in capital  others.

As bondholders redemption and UMCs repurchases of bonds
from open market in prior year amounted to US$466 million, which represented over 90% principal being redeemed; therefore, UMC redeemed the remaining bonds in whole at the Early Redemption Price on June 27, 2014. The principal amount of the redeemed
bonds was US$34 million. UMC recognized a gain of NT$15 million from the redemption as non-operating income and expense.



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In accordance with IAS 32, the value of the conversion right of the convertible bonds was
determined at issuance and recognized in additional paid-in capital  stock options amounting to NT$680 million, after reduction of issuance costs amounting to NT$3 million. The effective interest rate on the liability component of the
convertible bonds was determined to be 0.82%.



| | D. | In early June, 2012, UMC issued a five-year and a seven-year domestic unsecured corporate bonds amounting to NT$10,000 million, with a face value of NT$1 million per unit. The five-year domestic unsecured corporate
bond was issued in the amount of NT$7,500 million. Interest will be paid annually at a rate of 1.43%, and the principal will be repayable in June 2017 upon maturity. The seven-year domestic unsecured corporate bond was issued in the amount
of NT$2,500 million. Interest will be paid annually at a rate of 1.63%, and the principal will be repayable in June 2019 upon maturity.
| | -- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | E. | In mid-March, 2013, UMC issued five-year and seven-year domestic unsecured corporate bonds amounting to NT$10,000 million, with a face value of NT$1 million per unit. The five-year domestic unsecured corporate bond
was issued in the amount of NT$7,500 million. Interest will be paid annually at a rate of 1.35%, and the principal will be repayable in March 2018 upon maturity. The seven-year domestic unsecured corporate bond was issued in the amount of
NT$2,500 million. Interest will be paid annually at a rate of 1.50%, and the principal will be repayable in March 2020 upon maturity.
| | -- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | F. | In mid-June, 2014, UMC issued seven-year and ten-year domestic unsecured corporate bonds amounting to NT$5,000 million, with a face value of NT$1 million per unit. The seven-year domestic unsecured corporate bond
was issued in the amount of NT$2,000 million. Interest will be paid annually at a rate of 1.70%, and the principal will be repayable in June 2021 upon maturity. The ten-year domestic unsecured corporate bond was issued in the amount of
NT$3,000 million. Interest will be paid annually at a rate of 1.95%, and the principal will be repayable in June 2024 upon maturity.
| | -- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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| | G. | On May 18, 2015, UMC issued SGX-ST listed currency linked zero coupon convertible bonds. The terms and conditions of the bonds are as follows:
| | -- | ----------------------------------------------------------------------------------------------------------------------------------------------



| | a | Issue Amount: US$600 million
| | - | ----------------------------



| | b. | Period: May 18, 2015 ~ May 18, 2020 (Maturity date)
| | -- | ---------------------------------------------------



| | c. | Redemption:
| | -- | -----------



| | i. | UMC may redeem the bonds, in whole or in part, after 3 years of the issuance and prior to the maturity date, at the principal amount of the bonds with an interest calculated at the rate of -0.25% per annum (the Early
Redemption Amount) if the closing price of the ordinary shares of UMC on the TWSE, for a period of 20 out of 30 consecutive trading days, the last of which occurs not more than 5 days prior to the date upon which notice of such redemption is
published, is at least 125% of the conversion price. The Early Redemption Price will be converted into NTD based on the Fixed Exchange Rate (NTD 30.708=USD 1.00), and this fixed NTD amount will be converted using the prevailing rate at the time
of redemption for payment in USD.
| | -- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | ii. | UMC may redeem the bonds, in whole, but not in part, at the Early Redemption Amount if at least 90% in principal amount of the bonds has already been converted, redeemed or repurchased and cancelled.
| | --- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | iii. | UMC may redeem all, but not part, of the bonds, at the Early Redemption Amount at any time, in the event of certain changes in the R.O.C.s tax rules which would require UMC to gross up for payments of principal,
or to gross up for payments of interest or premium.
| | ---- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | iv. | All or any portion of the bonds will be redeemable at Early Redemption Amount at the option of bondholders on May 18, 2018 at 99.25% of the principal amount.
| | --- | -------------------------------------------------------------------------------------------------------------------------------------------------------------



| | v. | Bondholders have the right to require UMC to redeem all of the bonds at the Early Redemption Amount if UMCs ordinary shares cease to be listed on the Taiwan Stock Exchange.
| | -- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | vi. | In the event that a change of control as defined in the indenture of the bonds occurs to UMC, the bondholders shall have the right to require UMC to redeem the bonds, in whole but not in part, at the Early Redemption
Amount.
| | --- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | d. | Terms of Conversion:
| | -- | --------------------



| | i. | Underlying Securities: Ordinary shares of UMC
| | -- | ---------------------------------------------



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| | ii. | Conversion Period: The bonds are convertible at any time on or after June 28, 2015 and prior to May 8, 2020, into UMC ordinary shares; provided, however, that if the exercise date falls within 5 business days from the
beginning of, and during, any closed period, the right of the converting holder of the bonds to vote with respect to the shares it receives will be subject to certain restrictions.
| | --- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | iii. | Conversion Price and Adjustment: The conversion price was originally NT$17.50 per share. The conversion price will be subject to adjustments upon the occurrence of certain events set out in the indenture. The
conversion price was NT$16.7408 per share on December 31, 2015.
| | ---- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | e. | Redemption on the Maturity Date: On the maturity date, UMC will redeem the bonds at 98.76% of the principal amount unless, prior to such date:
| | -- | ----------------------------------------------------------------------------------------------------------------------------------------------



| | i. | UMC shall have redeemed the bonds at the option of UMC, or the bonds shall have been redeemed at option of the bondholder;
| | -- | --------------------------------------------------------------------------------------------------------------------------



| | ii. | The bondholders shall have exercised the conversion right before maturity; or
| | --- | -----------------------------------------------------------------------------



| | iii. | The bonds shall have been redeemed or repurchased by UMC and cancelled.
| | ---- | -----------------------------------------------------------------------

In accordance with
IAS 32, the value of the conversion right of the convertible bonds was determined at issuance and recognized in additional paid-in capital  stock options amounting to NT$1,894 million, after reduction of issuance costs amounting to NT$9
million. The effective interest rate on the liability component of the convertible bonds was determined to be 2.03%.



| | (13) | Long-Term Loans
| | ---- | ---------------



| | a. | Details of long-term loans as of December 31, 2014 and 2015 are as follows:
| | -- | ---------------------------------------------------------------------------



|                                                                   |  |                    |        |  |                   |   |        |            |  |                                                                                                                                                                         
|------------------------------------------------------------------ |  | ------------------ | ------ |  | ----------------- | - | ------ | ---------- |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|                                                                   |  | As of December 31, |        |  |                  
|Lenders                                                            |  | 2014               |        |  | 2015              |   |        | Redemption
|                                                                   |  | NT$(In Thousands)  |        |  | NT$(In Thousands) |   |        |           
|Secured Long-Term Loan from Mega International Commercial Bank (1) |  | $                  | 80,358 |  |                   | $ | 51,137 |            |  | Effective August 1, 2012 to August 1, 2017. Interest-only payment for the first
year. Principal is repaid in 17 quarterly payments with monthly interest payments.      
|Secured Long-Term Loan from Mega International Commercial Bank (2) |  |                    | 16,000 |  |                   |   | 12,000 |            |  | Effective November 21, 2013 to November 21, 2018. Interest-only payment for the first
year. Principal is repaid in 17 quarterly payments with monthly interest payments.



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|                                                        |  |                    |        |  |                   |  |         |            |  |                                                                                                                                                                          
|------------------------------------------------------- |  | ------------------ | ------ |  | ----------------- |  | ------- | ---------- |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|                                                        |  | As of December 31, |        |  |                  
|Lenders                                                 |  | 2014               |        |  | 2015              |  |         | Redemption
|                                                        |  | NT$(In Thousands)  |        |  | NT$(In Thousands) |  |         |           
|Secured Long-Term Loan from Taiwan Cooperative Bank (1) |  |                    | 87,647 |  |                   |  | 52,588  |            |  | Effective May 25, 2012 to May 25, 2017. Interest-only payment for the first
year. Principal is repaid in 17 quarterly payments with monthly interest payments.           
|Secured Long-Term Loan from Taiwan Cooperative Bank (2) |  |                    |       |  |                   |  | 40,156  |            |  | Effective January 10, 2013 to January 10, 2018. Interest-only payment for the first year.
Principal is repaid in 17 quarterly payments with monthly interest payments.   
|Secured Long-Term Loan from Taiwan Cooperative Bank (3) |  |                    | 84,265 |  |                   |  | 61,794  |            |  | Effective July 10, 2013 to July 10, 2018. Interest-only payment for the first
year. Principal is repaid in 17 quarterly payments with monthly interest payments.         
|Secured Long-Term Loan from Taiwan Cooperative Bank (4) |  |                    |       |  |                   |  | 19,410  |            |  | Effective February 13, 2015 to February 13, 2020. Interest-only payment for the first year.
Principal is repaid in 17 quarterly payments with monthly interest payments. 
|Secured Long-Term Loan from Taiwan Cooperative Bank (5) |  |                    |       |  |                   |  | 22,750  |            |  | Effective April 28, 2015 to April 28, 2020. Interest-only payment for the first year.
Principal is repaid in 17 quarterly payments with monthly interest payments.       
|Secured Long-Term Loan from Taiwan Cooperative Bank (6) |  |                    |       |  |                   |  | 7,300   |            |  | Effective August 10, 2015 to August 10, 2020. Interest-only payment for the first year.
Principal is repaid in 17 quarterly payments with monthly interest payments.     
|Secured Long-Term Loan from Taiwan Cooperative Bank (7) |  |                    |       |  |                   |  | 110,000 |            |  | Effective October 19, 2015 to October 19, 2025. Interest-only payment for the first year.
Principal is repaid in 37 quarterly payments with monthly interest payments.   
|Secured Long-Term Loan from Taiwan Cooperative Bank (8) |  |                    |       |  |                   |  | 2,510   |            |  | Effective October 28, 2015 to April 28, 2020. Interest-only payment for the first half year.
Principal is repaid in 17 quarterly payments with monthly interest payments.



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|                                                                     |  |                    |            |   |                   |   |            |            |  |                                                                                                                                                                         
|-------------------------------------------------------------------- |  | ------------------ | ---------- | - | ----------------- | - | ---------- | ---------- |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|                                                                     |  | As of December 31, |            |   |                  
|Lenders                                                              |  | 2014               |            |   | 2015              |   |            | Redemption
|                                                                     |  | NT$(In Thousands)  |            |   | NT$(In Thousands) |   |            |           
|Secured Long-Term Loan from Taiwan Cooperative Bank (9)              |  |                    |           |   |                   |   | 5,900      |            |  | Effective November 20, 2015 to November 20, 2020. Interest-only payment for the first year.
Principal is repaid in 17 quarterly payments with monthly interest payments.
|Unsecured Long-Term Loan from Bank of Taiwan                         |  |                    | 2,700,000  |   |                   |   | 2,625,000  |            |  | Repayable quarterly from October 31, 2015 to July 31, 2017 with monthly interest
payments.                                                                              
|Unsecured Syndicated Loans from Bank of Taiwan and 7 others          |  |                    |           |   |                   |   | 1,385,000  |            |  | Repayable semi-annually from February 6, 2017 to February 6, 2020 with monthly interest
payments.                                                                       
|Unsecured Long-Term Loan from Mega International Commercial Bank (1) |  |                    | 300,000    |   |                   |   | 1,423,077  |            |  | Repayable quarterly from October 4, 2015 to October 4, 2018 with monthly interest
payments.                                                                             
|Unsecured Long-Term Loan from Mega International Commercial Bank (2) |  |                    | 1,230,769  |   |                   |   |           |            |  | Repayable quarterly from December 28, 2012 to December 28, 2015 with monthly interest
payments.                                                                         
|Unsecured Long-Term Loan from E. Sun Bank                            |  |                    | 500,000    |   |                   |   | 444,445    |            |  | Repayable quarterly from December 24, 2015 to December 24, 2017 with monthly interest
payments.                                                                         
|Unsecured Long-Term Loan from Taiwan Cooperative Bank                |  |                    | 1,000,000  |   |                   |   | 1,900,000  |            |  | Repayable quarterly from March 24, 2016 to December 24, 2017 with monthly interest
payments.                                                                            
|Unsecured Revolving Loan from CTBC Bank (Note A)                     |  |                    | 1,000,000  |   |                   |   | 2,000,000  |            |  | Settlement due on August 30, 2016 with monthly interest payments.                                                                                                       
|Unsecured Revolving Loan from Chang Hwa Commercial Bank (Note B)     |  |                    | 2,666,667  |   |                   |   | 1,333,333  |            |  | Repayable quarterly from December 29, 2014 to December 29, 2016 with monthly interest
payments.                                                                         
|Unsecured Revolving Loan from KGI Bank (Note C)                      |  |                    | 1,000,000  |   |                   |   | 1,000,000  |            |  | Settlement due on December 29, 2019 with monthly interest payments.                                                                                                     
|Secured Syndicated Loans from Bank of Taiwan and 7 others            |  |                    | 1,385,000  |   |                   |   |           |            |  | Repayable semi-annually from February 7, 2015 to February 7, 2016 with monthly interest
payments.                                                                       
|Secured Syndicated Loans from Taiwan Cooperative Bank and 5 others   |  |                    | 150,000    |   |                   |   |           |            |  | Repayable semi-annually from October 25, 2010 to April 25, 2015 with monthly interest
payments.                                                                         
|                                                                     |  |                    |            |   |                   |   |            |            |  |                                                                                                                                                                         
|Subtotal                                                             |  |                    | 12,200,706 |   |                   |   | 12,496,400 |            |  |                                                                                                                                                                         
|Less: Administrative expenses from syndicated loans                  |  |                    | (2,250     | ) |                   |   | (6,942     | )          |  |                                                                                                                                                                         
|Less: Current portion                                                |  |                    | (3,774,986 | ) |                   |   | (6,601,721 | )          |  |                                                                                                                                                                         
|                                                                     |  |                    |            |   |                   |   |            |            |  |                                                                                                                                                                         
|Total                                                                |  | $                  | 8,423,470  |   |                   | $ | 5,887,737  |            |  |                                                                                                                                                                         
|                                                                     |  |                    |            |   |                   |   |            |            |  |                                                                                                                                                                         



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|               |  |                                  |             |  |      |  |             |      |  |  |             | 
|-------------- |  | -------------------------------- | ----------- |  | ---- |  | ----------- | ---- |  |  | ----------- | 
|               |  | For the years ended December 31, |            
|               |  | 2013                             |             |  | 2014 |  |             | 2015 | 
|Interest Rates |  |                                  | 1.23%~2.51% |  |      |  | 1.23%~2.51% |      |  |  | 1.10%~2.95% | 
|               |  |                                  |             |  |      |  |             |      |  |  |             | 



Note A:

UMC entered into a 5-year loan agreement with CTBC Bank, effective from August 30, 2011. The agreement offered UMC a revolving line of credit of NT$2.5 billion starting from the first use of the loan to the expiration date of
the agreement, August 30, 2016. As of December 31, 2014 and 2015, the unused line of credit were NT$1.5 billion and NT$0.5 billion, respectively.Note B:

UMC entered into a 5-year loan agreement with Chang Hwa Commercial Bank, effective from December 29, 2011. The agreement offered UMC a revolving line of credit of NT$3 billion. This line of credit will be reduced starting
from the end of the third year after the first use and every three months thereafter, with a total of nine adjustments. The expiration date of the agreement is December 29, 2016. As of December 31, 2014 and 2015, all lines of credit were
used.Note C:

UMC entered into a 5-year loan agreement with KGI Bank, effective from September 25, 2014. The agreement offered UMC a revolving line of credit of NT$2 billion. This line of credit will be reduced starting from the end of the
second year after the first use and every twelve months thereafter, with a total of four adjustments. The expiration date of the agreement is December 29, 2019. As of December 31, 2014 and 2015, the unused line of credit were both
NT$1 billion.




| | b. | Please refer to Note 8 for property, plant and equipment pledged as collateral for long- term loans.
| | -- | ----------------------------------------------------------------------------------------------------



| | c. | On December 24, 2014, the Board of Directors resolved to provide endorsement for NEXPOWERs syndicated loan from banks including Bank of Taiwan for the amount up to NT$1,700 million. As of December 31, 2014
and 2015, the actual amount provided were both NT$1,385 million.
| | -- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (14) | Post-Employment Benefits
| | ---- | ------------------------



| | a. | Defined contribution plan
| | -- | -------------------------

The Labor Pension Act of the R.O.C. (the Act) is a defined
contribution plan. Under the Act, the monthly contributions percentage shall not be less than 6% of these employees monthly wages. Accordingly, a total of NT$554 million, NT$597 million and NT$620 million were contributed by the Company for
the years ended December 31, 2013, 2014 and 2015, respectively. Pension benefits for employees of the Singapore branch, and other subsidiaries overseas were provided in accordance with the local regulations, and during the years ended December
31, 2013, 2014 and 2015, the Company made total contributions of NT$393 million, NT$445 million and NT$531 million, respectively.



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##### Table of Contents

| | b. | Defined benefit plan
| | -- | --------------------

The employee pension plan mandated by the Labor Standards Act of the
R.O.C. is a defined benefit plan. The pension benefits are disbursed based on the units of service years and average monthly salary prior to retirement according to the Labor Standards Act. Two units per year are awarded for the first 15
years of services while one unit per year is awarded after the completion of the 15th year and the total units will not exceed 45 units. The Company contributes an amount equivalent to 2% of
the employees total salaries and wages on a monthly basis to the pension fund deposited with the Bank of Taiwan under the name of an administered pension fund committee. For the years ended December 31, 2013, 2014 and 2015, total
pension expenses of NT$124 million, NT$113 million and NT$111 million, respectively, were recognized by the Company.



| | i. | Movements in present value of defined benefit obligation during the year:
| | -- | -------------------------------------------------------------------------



|                                                |  |                                  |            |   |                   |   |            |  
|----------------------------------------------- |  | -------------------------------- | ---------- | - | ----------------- | - | ---------- | -
|                                                |  | For the years ended December 31, |           
|                                                |  | 2014                             |            |   | 2015              |  
|                                                |  | NT$(In Thousands)                |            |   | NT$(In Thousands) |  
|Defined benefit obligation at beginning of year |  | $                                | (5,402,350 | ) |                   | $ | (5,450,787 | )
|Items recognized as profit or loss:             |  |                                  |            |   |                   |   |            |  
|Service cost                                    |  |                                  | (37,481    | ) |                   |   | (30,973    | )
|Interest cost                                   |  |                                  | (108,047   | ) |                   |   | (114,468   | )
|                                                |  |                                  |            |   |                   |   |            |  
|Subtotal                                        |  |                                  | (145,528   | ) |                   |   | (145,441   | )
|                                                |  |                                  |            |   |                   |   |            |  



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|                                                                |  |                                  |            |   |                   |   |            |  
|--------------------------------------------------------------- |  | -------------------------------- | ---------- | - | ----------------- | - | ---------- | -
|                                                                |  | For the years ended December 31, |           
|                                                                |  | 2014                             |            |   | 2015              |  
|                                                                |  | NT$(In Thousands)                |            |   | NT$(In Thousands) |  
|Remeasurements recognized in other comprehensive income (loss): |  |                                  |            |   |                   |   |            |  
|Arising from changes in demographic assumptions                 |  |                                  | 59         |   |                   |   | 342,640    |  
|Arising from changes in financial assumptions                   |  |                                  | 86,437     |   |                   |   | (336,679   | )
|Experience adjustments                                          |  |                                  | (94,315    | ) |                   |   | (56,398    | )
|                                                                |  |                                  |            |   |                   |   |            |  
|Subtotal                                                        |  |                                  | (7,819     | ) |                   |   | (50,437    | )
|                                                                |  |                                  |            |   |                   |   |            |  
|Benefits paid                                                   |  |                                  | 104,910    |   |                   |   | 260,310    |  
|                                                                |  |                                  |            |   |                   |   |            |  
|Defined benefit obligation at end of year                       |  | $                                | (5,450,787 | ) |                   | $ | (5,386,355 | )
|                                                                |  |                                  |            |   |                   |   |            |  



| | ii. | Movements in fair value of plan assets during the year:
| | --- | -------------------------------------------------------



|                                                                     |  |                                  |           |   |                   |   |           |  
|-------------------------------------------------------------------- |  | -------------------------------- | --------- | - | ----------------- | - | --------- | -
|                                                                     |  | For the years ended December 31, |          
|                                                                     |  | 2014                             |           |   | 2015              |  
|                                                                     |  | NT$(In Thousands)                |           |   | NT$(In Thousands) |  
|Beginning balance of fair value of plan assets                       |  | $                                | 1,604,565 |   |                   | $ | 1,625,297 |  
|Items recognized as profit or loss:                                  |  |                                  |           |   |                   |   |           |  
|Interest income on plan assets                                       |  |                                  | 32,091    |   |                   |   | 34,132    |  
|Contribution by employer                                             |  |                                  | 88,339    |   |                   |   | 86,198    |  
|Payment of benefit obligation                                        |  |                                  | (104,910  | ) |                   |   | (260,310  | )
|Remeasurements recognized in other comprehensive income (loss):      |  |                                  |           |   |                   |   |           |  
|Return on plan assets, excluding amounts included in interest income |  |                                  | 5,212     |   |                   |   | 10,237    |  
|                                                                     |  |                                  |           |   |                   |   |           |  
|Fair value of plan assets at end of year                             |  | $                                | 1,625,297 |   |                   | $ | 1,495,554 |  
|                                                                     |  |                                  |           |   |                   |   |           |  

The actual returns on plan assets of the Company for the years ended December 31, 2014 and 2015 were NT$37
million and NT$44 million, respectively.



| | iii. | The defined benefit plan recognized on the consolidated balance sheets are as follows:
| | ---- | --------------------------------------------------------------------------------------



|                                                                                          |  |                    |            |   |                   |   |            |  
|----------------------------------------------------------------------------------------- |  | ------------------ | ---------- | - | ----------------- | - | ---------- | -
|                                                                                          |  | As of December 31, |           
|                                                                                          |  | 2014               |            |   | 2015              |  
|                                                                                          |  | NT$(In Thousands)  |            |   | NT$(In Thousands) |  
|Present value of the defined benefit obligation                                           |  | $                  | (5,450,787 | ) |                   | $ | (5,386,355 | )
|Fair value of plan assets                                                                 |  |                    | 1,625,297  |   |                   |   | 1,495,554  |  
|                                                                                          |  |                    |            |   |                   |   |            |  
|Funded status                                                                             |  |                    | (3,825,490 | ) |                   |   | (3,890,801 | )
|                                                                                          |  |                    |            |   |                   |   |            |  
|Net defined benefit liabilities, noncurrent recognized on the consolidated balance sheets |  | $                  | (3,825,490 | ) |                   | $ | (3,890,801 | )
|                                                                                          |  |                    |            |   |                   |   |            |  



F-66



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##### Table of Contents

| | iv. | The major categories of plan assets as a percentage of the fair value of the total plan assets are as follows:
| | --- | --------------------------------------------------------------------------------------------------------------



|                   |  |                    |    |   |                 |  |    |  
|------------------ |  | ------------------ | -- | - | --------------- |  | -- | -
|                   |  | As of December 31, |   
|                   |  | 2014               |    |   | 2015            | 
|                   |  | UMC and FORTUNE    |    |   | UMC and FORTUNE | 
|Cash               |  |                    | 21 | % |                 |  | 21 | %
|Equity instruments |  |                    | 50 | % |                 |  | 49 | %
|Debt instruments   |  |                    | 26 | % |                 |  | 27 | %
|Others             |  |                    | 3  | % |                 |  | 3  | %

Employee pension fund is deposited under a trust administered by the Bank of Taiwan. The overall expected
rate of return on assets is determined based on historical trend and analysts expectations on the assets returns in the market over the obligation period. Furthermore, the utilization of the fund is determined by the labor pension
fund supervisory committee, which also guarantees the minimum earnings to be no less than the earnings attainable from interest rates offered by local banks for two-year time deposits.



| | v. | The principal underlying actuarial assumptions are as follows:
| | -- | --------------------------------------------------------------



|                               |  |                         |      |   |         |  |      |  
|------------------------------ |  | ----------------------- | ---- | - | ------- |  | ---- | -
|                               |  | As of December 31, 2014 |     
|                               |  | UMC                     |      |   | FORTUNE | 
|Discount rate                  |  |                         | 2.10 | % |         |  | 2.25 | %
|Rate of future salary increase |  |                         | 4.00 | % |         |  | 3.00 | %



|                               |  |                         |      |   |         |  |      |  
|------------------------------ |  | ----------------------- | ---- | - | ------- |  | ---- | -
|                               |  | As of December 31, 2015 |     
|                               |  | UMC                     |      |   | FORTUNE | 
|Discount rate                  |  |                         | 1.70 | % |         |  | 1.75 | %
|Rate of future salary increase |  |                         | 4.00 | % |         |  | 3.00 | %



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##### Table of Contents

| | vi. | Expected future benefit payments are as follows:
| | --- | ------------------------------------------------



|                    |  |                         |           | 
|------------------- |  | ----------------------- | --------- | 
|Year                |  | As of December 31, 2015 |          
|                    |  | NT$
(In Thousands)      |          
|2016                |  | $                       | 166,482   | 
|2017                |  |                         | 164,761   | 
|2018                |  |                         | 180,278   | 
|2019                |  |                         | 208,575   | 
|2020                |  |                         | 252,078   | 
|2021 and thereafter |  |                         | 4,973,582 | 
|                    |  |                         |           | 
|Total               |  | $                       | 5,945,756 | 
|                    |  |                         |           | 

The Company expects to make pension fund contribution of NT$91 million in 2016. The weighted-average
durations of the defined benefit obligation are 16 years and 13 years as of December 31, 2014 and 2015, respectively.



| | vii. | Sensitivity analysis:
| | ---- | ---------------------



|                                                  |  |                         |         |  |                                |   |          |                   |  |   |                   |   |  |   |         | 
|------------------------------------------------- |  | ----------------------- | ------- |  | ------------------------------ | - | -------- | ----------------- |  | - | ----------------- | - |  | - | ------- | 
|                                                  |  | As of December 31, 2014 |        
|                                                  |  | Discount rate           |         |  | Rate of future salary increase |  
|                                                  |  | 1% increase             |         |  | 1% decrease                    |   |          | 1% increase       |  |   | 1% decrease       |  
|                                                  |  | NT$(In Thousands)       |         |  | NT$(In Thousands)              |   |          | NT$(In Thousands) |  |   | NT$(In Thousands) |  
|Decrease (increase) in defined benefit obligation |  | $                       | 780,187 |  |                                | $ | (942,897 | )                 |  | $ | (853,732          | ) |  | $ | 728,582 | 



|                                                  |  |                         |         |  |                                |   |          |                   |  |   |                   |   |  |   |         | 
|------------------------------------------------- |  | ----------------------- | ------- |  | ------------------------------ | - | -------- | ----------------- |  | - | ----------------- | - |  | - | ------- | 
|                                                  |  | As of December 31, 2015 |        
|                                                  |  | Discount rate           |         |  | Rate of future salary increase |  
|                                                  |  | 1% increase             |         |  | 1% decrease                    |   |          | 1% increase       |  |   | 1% decrease       |  
|                                                  |  | NT$(In Thousands)       |         |  | NT$(In Thousands)              |   |          | NT$(In Thousands) |  |   | NT$(In Thousands) |  
|Decrease (increase) in defined benefit obligation |  | $                       | 536,135 |  |                                | $ | (617,562 | )                 |  | $ | (539,803          | ) |  | $ | 482,681 | 

The sensitivity analyses above have been determined based on a method that extrapolates the impact on the net
defined benefit obligation as a result of reasonable changes in key assumptions occurring at the end of the reporting period.



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##### Table of Contents

| | (15) | Equity
| | ---- | ------



| | a. | Capital stock:
| | -- | --------------



| | i. | UMC had 26,000 million common shares authorized to be issued as of December 31, 2014 and 2015, of which 12,725 million shares and 12,758 million shares were issued as of December 31, 2014 and 2015, respectively, each at
a par value of NT$10.
| | -- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | ii. | UMC had 150 million and 136 million ADSs, which were traded on the NYSE as of December 31, 2014 and 2015, respectively. The total number of common shares of UMC represented by all issued ADSs were 749 million
shares and 678 million shares as of December 31, 2014 and 2015, respectively. One ADS represents five common shares.
| | --- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | iii. | Among the employee stock options issued by UMC on June 19, 2009, 36 million options were exercised for the year ended December, 31 2014. The issuance process was completed through the authority.
| | ---- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | iv. | Among the employee stock options issued by UMC on June 19, 2009, 28 million options had been exercised for the year ended December 31, 2015. The issuance process was completed through the authority.
| | --- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | v. | UMC sold 5 million shares and 61 million shares of treasury stock to employees for the years ended December 31, 2014 and 2015, respectively, which were repurchased during the period from March 15 to
May 6, 2013, for the purpose of transferring to employees.
| | -- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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##### Table of Contents

| | b. | Treasury stock:
| | -- | ---------------



| | i. | UMC carried out treasury stock program and repurchased its shares from the centralized securities exchange market. The purpose for repurchase and changes in treasury stock during the years ended December 31, 2014
and 2015 are as follows:
| | -- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|                                                              |  |                      |         |  |          |  |   |          |  |  |                        |  |  |  |         | 
|------------------------------------------------------------- |  | -------------------- | ------- |  | -------- |  | - | -------- |  |  | ---------------------- |  |  |  | ------- | 
|For the year ended December 31, 2014
(In thousands of shares) |  |                      |         |  |          |  |   |          | 
|                                                              |  |                      |         | 
|Purpose                                                       |  | As ofJanuary 1, 2014 |         |  | Increase |  |   | Decrease |  |  | As ofDecember 31, 2014 | 
|For transfer to employees                                     |  |                      | 200,000 |  |          |  |  |          |  |  | 5,490                  |  |  |  | 194,510 | 
|                                                              |  |                      |         |  |          |  |   |          |  |  |                        |  |  |  |         | 



|                                                              |  |                      |         |  |          |  |         |          |  |  |                        |  |  |  |         | 
|------------------------------------------------------------- |  | -------------------- | ------- |  | -------- |  | ------- | -------- |  |  | ---------------------- |  |  |  | ------- | 
|For the year ended December 31, 2015
(In thousands of shares) |  |                      |         |  |          |  |         |          | 
|                                                              |  |                      |         | 
|Purpose                                                       |  | As ofJanuary 1, 2015 |         |  | Increase |  |         | Decrease |  |  | As ofDecember 31, 2015 | 
|For transfer to employees                                     |  |                      | 194,510 |  |          |  | 200,000 |          |  |  | 60,696                 |  |  |  | 333,814 | 
|                                                              |  |                      |         |  |          |  |         |          |  |  |                        |  |  |  |         | 



| | ii. | According to the Securities and Exchange Law of the R.O.C., the total shares of treasury stock shall not exceed 10% of UMCs issued stock, and the total purchase amount shall not exceed the sum of the retained
earnings, additional paid-in capital-premiums and realized additional paid-in capital. As of December 31, 2014 and 2015, the treasury stock held by UMC did not exceed the threshold.
| | --- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | iii. | In compliance with Securities and Exchange Law of the R.O.C., treasury stock should not be pledged, nor should it be entitled to voting rights or receiving dividends. Stock held by subsidiaries and associates is
treated as treasury stock. According to the Company Act of R.O.C., these subsidiaries have the same rights as other stockholders except for subscription to new stock issuance and voting rights.
| | ---- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | iv. | As of December 31, 2014 and 2015, UMCs subsidiary, FORTUNE VENTURE CAPITAL CORP., and associate, HSUN CHIEH INVESTMENT CO., LTD., held 16 million shares and 441 million shares, respectively, of UMCs stock as
available-for-sale financial assets. As of December 31, 2014 and 2015, UMCs associate, MEGA MISSION LIMITED PARTNERSHIP, held 29 million shares and 10 million shares, respectively, of UMCs stock as financial assets at fair value through
profit or loss. The closing prices of UMCs stock on December 31, 2014 and 2015 were NT$14.75 and NT$12.10, respectively.
| | --- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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##### Table of Contents

| | c. | Retained earnings and dividend policies:
| | -- | ----------------------------------------

According to UMCs Articles of Incorporation,
current years earnings, if any, shall be distributed in the following order:



| | i. | Payment of all taxes and dues;
| | -- | ------------------------------



| | ii. | Offset prior years operation losses;
| | --- | -------------------------------------



| | iii. | Appropriate 10% of the remaining amount after deducting items (i) and (ii) as a legal reserve;
| | ---- | ----------------------------------------------------------------------------------------------



| | iv. | Appropriate or reverse special reserve in accordance with relevant laws or regulations, and
| | --- | -------------------------------------------------------------------------------------------



| | v. | Appropriate 0.1% of the remaining amount after deducting items (i), (ii), (iii) and (iv) as directors remuneration; and
| | -- | ------------------------------------------------------------------------------------------------------------------------



| | vi. | After deducting items (i), (ii), (iii) and (iv) above from the current years earnings, no less than 5% of the remaining amount together with the prior years unappropriated earnings is to be allocated as
employee bonus, which will be settled through issuance of new shares of UMC, or cash. Employees of UMCs subsidiaries, meeting certain criteria determined by the Board of Directors, are also eligible for the employee stock bonus.
| | --- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | vii. | The distribution of the remaining portion, if any, will be recommended by the Board of Directors and resolved in the stockholders meeting.
| | ---- | -------------------------------------------------------------------------------------------------------------------------------------------

The policy for dividend distribution should reflect factors such as the current and future investment environment, funding requirements,
domestic and international competition and capital budgets; as well as the benefit of stockholders, stock dividend equilibrium and long-term financial planning. The Board of Directors shall make the distribution proposal annually and present it
at the stockholders meeting. UMCs Articles of Incorporation further provide that at least 20% of the dividends must be paid in the form of cash. Accordingly, no more than 80% of the dividends to stockholders, if any, may be paid in the
form of stock dividends.



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##### Table of Contents

In consideration of the revision of the Company Act in May 2015 (Please refer to Note 6(18) for
more details), the Board of Directors resolved the amendment of UMCs Articles of Incorporation on March 16, 2016. The amendment will be proposed for approval at the stockholders meeting in June 2016. According to the amendment of
UMCs Articles of Incorporation, current years earnings, if any, shall be distributed in the following order:



| | i. | Payment of all taxes and dues;
| | -- | ------------------------------



| | ii. | Offset prior years operation losses;
| | --- | -------------------------------------



| | iii. | Appropriate 10% of the remaining amount after deducting items (i) and (ii) as a legal reserve, until the accumulated legal reserve equals the total amount of capital;
| | ---- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | iv. | Appropriate or reverse special reserve in accordance with relevant laws or regulations, and
| | --- | -------------------------------------------------------------------------------------------



| | v. | After deducting items (i), (ii), (iii) and (iv) above from the current years earnings and together with the prior years unappropriated earnings, the distribution proposal according to dividend policies will
be recommend by the Board of Directors and resolved in the stockholders meeting.
| | -- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

The policy for dividend distribution
should reflect factors such as the current and future investment environment, funding requirements, domestic and international competition and capital budgets; as well as the benefit of stockholders, stock dividend equilibrium and long-term
financial planning. The Board of Directors shall make the distribution proposal annually and present it at the stockholders meeting. UMCs Articles of Incorporation further provide that at least 20% of the dividends must be paid in
the form of cash. Accordingly, no more than 80% of the dividends to stockholders, if any, may be paid in the form of stock dividends.

According to the regulations of Taiwan Financial Supervisory Commission (FSC), UMC is required to appropriate a special reserve in the amount
equal to the sum of debit elements under equity, such as unrealized loss on financial instruments and negative cumulative translation adjustment, at every year-end. Such special reserve is prohibited from distribution. However, if any of
the debit elements is reversed, the special reserve in the amount equal to the reversal may be released for earnings distribution or offsetting accumulated deficit.

2014 distribution of earnings was approved through the stockholders meeting on June 9, 2015, while 2015 distribution was approved
through the Board of Directors meeting on March 16, 2016. The details of distribution are as follows:



|               |  |                                                   |           |  |                                     |   |           |      |  |   |      |  |  |   |      | 
|-------------- |  | ------------------------------------------------- | --------- |  | ----------------------------------- | - | --------- | ---- |  | - | ---- |  |  | - | ---- | 
|               |  | Appropriation of earnings(in thousand NT dollars) |           |  | Cash dividend per share(NT dollars) |  
|               |  | 2014                                              |           |  | 2015                                |   |           | 2014 |  |   | 2015 | 
|Legal reserve  |  | $                                                 | 1,214,134 |  |                                     | $ | 1,344,862 |      |  |   |      |  |  |   |      | 
|Cash dividends |  |                                                   | 6,939,322 |  |                                     |   | 6,906,973 |      |  | $ | 0.55 |  |  | $ | 0.55 | 



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The cash dividend per share for 2014 was adjusted to NT$0.54969673 per share according to the
resolution of the Board of Directors meeting on June 17, 2015. The adjustment was made for the increase in outstanding common shares that resulted from the exercises of employee stock options and the transfers of treasury shares to employees
after the stockholders meeting.

The appropriation of 2015 unappropriated retained earnings has not yet been approved by the
stockholders meeting as of the reporting date. Information on the Board of Directors recommendations and stockholders approval can be obtained from the Market Observation Post System on the website of the TWSE.

Please refer to Note 6(18) for information on the employees compensation and remuneration to directors.



| | d. | Non-controlling interests:
| | -- | --------------------------



|                                                          |  |                                  |           |   |                    |   |           |                    |  |   |            |  
|--------------------------------------------------------- |  | -------------------------------- | --------- | - | ------------------ | - | --------- | ------------------ |  | - | ---------- | -
|                                                          |  | For the years ended December 31, |          
|                                                          |  | 2013                             |           |   | 2014               |   |           | 2015               | 
|                                                          |  | NT$
(In Thousands)               |           |   | NT$
(In Thousands) |   |           | NT$
(In Thousands) | 
|Balance as of January 1                                   |  | $                                | 2,571,139 |   |                    | $ | 4,319,988 |                    |  | $ | 3,849,798  |  
|Attributable to non-controlling interests:                |  |                                  |           |   |                    |   |           |                    |  |   |            |  
|Net loss                                                  |  |                                  | (525,243  | ) |                    |   | (661,752  | )                  |  |   | (612,973   | )
|Other comprehensive income (loss)                         |  |                                  | 11,220    |   |                    |   | 142,991   |                    |  |   | (62,114    | )
|Changes in subsidiaries ownership                        |  |                                  | (600,009  | ) |                    |   | 59,785    |                    |  |   | (127,817   | )
|Effect of consolidation (deconsolidation) of subsidiaries |  |                                  | 2,862,881 |   |                    |   | (11,214   | )                  |  |   | (1,019,829 | )
|                                                          |  |                                  |           |   |                    |   |           |                    |  |   |            |  
|Balance as of December 31                                 |  | $                                | 4,319,988 |   |                    | $ | 3,849,798 |                    |  | $ | 2,027,065  |  
|                                                          |  |                                  |           |   |                    |   |           |                    |  |   |            |  



| | (16) | Employee Stock Options
| | ---- | ----------------------

On May 12, 2009, the Company was authorized by the Securities
and Futures Bureau of FSC, to issue employee stock options with a total number of 500 million units each. Each unit entitled an optionee to subscribe to 1 share of the Companys common stock. Settlement upon the exercise of the options
would be made through the issuance of new shares by the Company. The exercise prices of the options were set at the closing prices of the Companys common stock on the dates of grant. The contractual lives were 6 years and an optionee
might exercise the options in accordance with certain schedules as prescribed by the plans after 2 years from the dates of grant. Detailed information relevant to the employee stock options is disclosed as follows:



|              |  |                                              |         |  |                                                                       |  |   |                                                                       |  |  |                     |  |  |   |       | 
|------------- |  | -------------------------------------------- | ------- |  | --------------------------------------------------------------------- |  | - | --------------------------------------------------------------------- |  |  | ------------------- |  |  | - | ----- | 
|Date of grant |  | Total number ofoptions granted(in thousands) |         |  | Total number ofoptionsoutstanding asof December 31,2015(in thousands) |  |   | Shares availableto option holdersas of December 31,2015(in thousands) |  |  | Exercise price(NT$) | 
|June 19, 2009 |  |                                              | 300,000 |  |                                                                       |  |  |                                                                       |  |  |                    |  |  | $ | 10.40 | 
|              |  |                                              |         |  |                                                                       |  |   |                                                                       |  |  |                     |  |  |   |       | 
|Total         |  |                                              | 300,000 |  |                                                                       |  |  |                                                                       |  |  |                    |  |  |   |       | 
|              |  |                                              |         |  |                                                                       |  |   |                                                                       |  |  |                     |  |  |   |       | 



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##### Table of Contents

| | a. | A summary of the Companys stock option plan and related information for the years ended December 31, 2013, 2014 and 2015 is as follows:
| | -- | ----------------------------------------------------------------------------------------------------------------------------------------

For the year ended December 31, 2013



|                                   |  |                       |          |   |                                                 |  |          |                                                 |  |   |       | 
|---------------------------------- |  | --------------------- | -------- | - | ----------------------------------------------- |  | -------- | ----------------------------------------------- |  | - | ----- | 
|                                   |  | Options(in thousands) |          |   | Shares available tooption holders(in thousands) |  |          | Weighted - averageexercise price per share(NTD) | 
|Outstanding at beginning of period |  |                       | 465,006  |   |                                                 |  | 465,006  |                                                 |  | $ | 15.86 | 
|Exercised                          |  |                       | (42,540  | ) |                                                 |  | (42,540  | )                                               |  | $ | 10.40 | 
|Forfeited                          |  |                       | (12,000  | ) |                                                 |  | (12,000  | )                                               |  | $ | 16.73 | 
|Expired                            |  |                       | (322,698 | ) |                                                 |  | (322,698 | )                                               |  | $ | 18.03 | 
|                                   |  |                       |          |   |                                                 |  |          |                                                 |  |   |       | 
|Outstanding at end of period       |  |                       | 87,768   |   |                                                 |  | 87,768   |                                                 |  | $ | 10.40 | 
|                                   |  |                       |          |   |                                                 |  |          |                                                 |  |   |       | 
|Exercisable at end of period       |  |                       | 82,839   |   |                                                 |  | 82,839   |                                                 |  | $ | 10.40 | 
|                                   |  |                       |          |   |                                                 |  |          |                                                 |  |   |       | 

For the year ended December 31, 2014



|                                   |  |                       |         |   |                                                 |  |         |                                                 |  |   |       | 
|---------------------------------- |  | --------------------- | ------- | - | ----------------------------------------------- |  | ------- | ----------------------------------------------- |  | - | ----- | 
|                                   |  | Options(in thousands) |         |   | Shares available tooption holders(in thousands) |  |         | Weighted - averageexercise price per share(NTD) | 
|Outstanding at beginning of period |  |                       | 87,768  |   |                                                 |  | 87,768  |                                                 |  | $ | 10.40 | 
|Exercised                          |  |                       | (35,655 | ) |                                                 |  | (35,655 | )                                               |  | $ | 10.40 | 
|Forfeited                          |  |                       | (3,384  | ) |                                                 |  | (3,384  | )                                               |  | $ | 10.40 | 
|                                   |  |                       |         |   |                                                 |  |         |                                                 |  |   |       | 
|Outstanding at end of period       |  |                       | 48,729  |   |                                                 |  | 48,729  |                                                 |  | $ | 10.40 | 
|                                   |  |                       |         |   |                                                 |  |         |                                                 |  |   |       | 
|Exercisable at end of period       |  |                       | 44,222  |   |                                                 |  | 44,222  |                                                 |  | $ | 10.40 | 
|                                   |  |                       |         |   |                                                 |  |         |                                                 |  |   |       | 



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##### Table of Contents

For the year ended December 31, 2015



|                                   |  |                       |         |   |                                                 |  |         |                                                 |  |   |       | 
|---------------------------------- |  | --------------------- | ------- | - | ----------------------------------------------- |  | ------- | ----------------------------------------------- |  | - | ----- | 
|                                   |  | Options(in thousands) |         |   | Shares available tooption holders(in thousands) |  |         | Weighted - averageexercise price per share(NTD) | 
|Outstanding at beginning of period |  |                       | 48,729  |   |                                                 |  | 48,729  |                                                 |  | $ | 10.40 | 
|Exercised                          |  |                       | (27,828 | ) |                                                 |  | (27,828 | )                                               |  | $ | 10.40 | 
|Forfeited                          |  |                       | (469    | ) |                                                 |  | (469    | )                                               |  | $ | 10.40 | 
|Expired                            |  |                       | (20,432 | ) |                                                 |  | (20,432 | )                                               |  | $ | 10.40 | 
|                                   |  |                       |         |   |                                                 |  |         |                                                 |  |   |       | 
|Outstanding at end of period       |  |                       |        |   |                                                 |  |        |                                                 |  | $ | 10.40 | 
|                                   |  |                       |         |   |                                                 |  |         |                                                 |  |   |       | 
|Exercisable at end of period       |  |                       |        |   |                                                 |  |        |                                                 |  | $ | 10.40 | 
|                                   |  |                       |         |   |                                                 |  |         |                                                 |  |   |       | 



| | b. | All employee stock options expired on June 18, 2015. Therefore, both total number of options outstanding and shares exercisable to option holders were zero.
| | -- | ------------------------------------------------------------------------------------------------------------------------------------------------------------

The weighted-average share price at the date of exercise of employee stock options for the years ended December 31, 2013, 2014 and 2015
were NT$13.46, NT$14.06 and NT$14.95, respectively. The compensation expenses for the years ended December 31, 2013, 2014 and 2015 were NT$29 million, NT$1 million and NT$1 million, respectively.



| | (17) | Operating Revenues
| | ---- | ------------------



|                         |  |                                 |             |  |                    |   |             |                    |  |   |             | 
|------------------------ |  | ------------------------------- | ----------- |  | ------------------ | - | ----------- | ------------------ |  | - | ----------- | 
|                         |  | For the years endedDecember 31, |            
|                         |  | 2013                            |             |  | 2014               |   |             | 2015               | 
|                         |  | NT$
(In Thousands)              |             |  | NT$
(In Thousands) |   |             | NT$
(In Thousands) | 
|Net sales                |  |                                 |             |  |                    |   |             |                    |  |   |             | 
|Sale of goods            |  | $                               | 119,900,985 |  |                    | $ | 134,526,268 |                    |  | $ | 140,640,738 | 
|Other operating revenues |  |                                 |             |  |                    |   |             |                    |  |   |             | 
|Royalty                  |  |                                 | 10,691      |  |                    |   | 1,767,723   |                    |  |   | 18,616      | 
|Mask tooling             |  |                                 | 2,925,145   |  |                    |   | 3,137,979   |                    |  |   | 3,424,335   | 
|Others                   |  |                                 | 974,815     |  |                    |   | 580,106     |                    |  |   | 746,732     | 
|                         |  |                                 |             |  |                    |   |             |                    |  |   |             | 
|Net operating revenues   |  | $                               | 123,811,636 |  |                    | $ | 140,012,076 |                    |  | $ | 144,830,421 | 
|                         |  |                                 |             |  |                    |   |             |                    |  |   |             | 



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##### Table of Contents

On August 29, 2014, UMC entered into a technology license contract with FUJITSU SEMICONDUCTOR
LIMITED (FUJITSU) under which UMC granted a perpetual license to its 40LP (low power) process technology to FUJITSU for royalty income. As UMC completed all the performance obligations under the contract by the end of 2014, the royalty
income was recognized in 2014.



| | (18) | Operating Costs and Expenses
| | ---- | ----------------------------

The Companys personnel, depreciation and
amortization expenses are summarized as follows:



|                           |  |                                  |            |  |                    |   |           |                    |  |   |                |  |  |                   |            |  |       |   |           |                |  |   |                   |  |  |       |            |  |  |   |           |  |  |   |            | 
|-------------------------- |  | -------------------------------- | ---------- |  | ------------------ | - | --------- | ------------------ |  | - | -------------- |  |  | ----------------- | ---------- |  | ----- | - | --------- | -------------- |  | - | ----------------- |  |  | ----- | ---------- |  |  | - | --------- |  |  | - | ---------- | 
|                           |  | For the years ended December 31, |           
|                           |  | 2013                             |            |  | 2014               |   |           | 2015               | 
|                           |  | Operatingcosts                   |            |  | Operatingexpenses  |   |           | Total              |  |   | Operatingcosts |  |  | Operatingexpenses |            |  | Total |   |           | Operatingcosts |  |   | Operatingexpenses |  |  | Total |           
|                           |  | NT$
(In Thousands)               |            |  | NT$
(In Thousands) |   |           | NT$
(In Thousands) | 
|                           |  |                                 
|Personnel expenses         |  |                                  |            |  |                    |   |           |                    |  |   |                |  |  |                   |            |  |       |   |           |                |  |   |                   |  |  |       |            |  |  |   |           |  |  |   |            | 
|Salaries                   |  | $                                | 12,591,125 |  |                    | $ | 4,944,704 |                    |  | $ | 17,535,829     |  |  | $                 | 14,066,492 |  |       | $ | 5,719,457 |                |  | $ | 19,785,949        |  |  | $     | 14,790,037 |  |  | $ | 6,168,362 |  |  | $ | 20,958,399 | 
|Labor and health insurance |  |                                  | 719,009    |  |                    |   | 297,857   |                    |  |   | 1,016,866      |  |  |                   | 794,333    |  |       |   | 318,830   |                |  |   | 1,113,163         |  |  |       | 820,037    |  |  |   | 340,102   |  |  |   | 1,160,139  | 
|Pension                    |  |                                  | 799,176    |  |                    |   | 281,573   |                    |  |   | 1,080,749      |  |  |                   | 873,437    |  |       |   | 282,209   |                |  |   | 1,155,646         |  |  |       | 943,297    |  |  |   | 324,866   |  |  |   | 1,268,163  | 
|Other personnel expenses   |  |                                  | 178,025    |  |                    |   | 74,493    |                    |  |   | 252,518        |  |  |                   | 212,883    |  |       |   | 75,599    |                |  |   | 288,482           |  |  |       | 229,491    |  |  |   | 96,498    |  |  |   | 325,989    | 
|Depreciation               |  |                                  | 34,990,350 |  |                    |   | 2,180,969 |                    |  |   | 37,171,319     |  |  |                   | 36,427,088 |  |       |   | 2,307,181 |                |  |   | 38,734,269        |  |  |       | 41,022,028 |  |  |   | 2,381,481 |  |  |   | 43,403,509 | 
|Amortization               |  |                                  | 530,897    |  |                    |   | 659,627   |                    |  |   | 1,190,524      |  |  |                   | 633,786    |  |       |   | 1,237,992 |                |  |   | 1,871,778         |  |  |       | 654,711    |  |  |   | 1,344,390 |  |  |   | 1,999,101  | 



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Based on Article 235-1 of Company Act revised on May 20, 2015, the Company shall distribute a
portion of current years profit as employees compensation after offsetting the cumulative losses, if any. The aforementioned employees compensation distributed in the form of shares or in cash shall be resolved by a majority vote
at a meeting of Board of Directors attended by two-thirds of the total number of directors and reported at the stockholders meeting. The Board of Directors approved the distribution on March 16, 2016 and will amend the Articles of
Incorporation according to the aforementioned revision of Company Act at the stockholders meeting in 2016. The employees compensation for 2015 was determined based on the revised Articles of Incorporation and will be reported at the
stockholders meeting.

The policies of employees compensation and remuneration to directors bound by the amendment of
UMCs Articles of Incorporation, which will be proposed in the stockholders meeting, are as follows:

The Company shall
distribute no less than 5% of current years profit as employees compensation and no greater than 0.1% of current years profit as remuneration to directors after offsetting the cumulative losses, if any. The employees
compensation shall be distributed in the form of shares or in cash to the employee who satisfies certain criteria set up by the Board of Directors. The remuneration to directors shall be distributed in cash only. The employees
compensation and remuneration to directors shall be resolved by a majority vote at a meeting of Board of Directors attended by two-thirds of the total number of directors and reported at the stockholders meeting.

The Company estimates the amounts of the employees compensation and remuneration to directors and recognizes them in the profit or loss
during the periods when earned for the years ended December 31, 2014 and 2015. The Board of Directors estimated the amount by taking into consideration UMCs Articles of Incorporation, government regulations and industry averages. If the board
subsequently modifies the estimates significantly, UMC will recognize the change as an adjustment in the profit or loss in the same period. The difference between the estimation and the resolution of the stockholders meeting will be recognized
in profit or loss in the subsequent year.

2014 employees compensation and directors remuneration were approved through the
stockholders meeting on June 9, 2015, while 2015 employees compensation and directors remuneration were approved through the Board of Directors meeting on March 16, 2016. The details of information are as follows:



|                               |  |                   |           |  |                   |   |           | 
|------------------------------ |  | ----------------- | --------- |  | ----------------- | - | --------- | 
|                               |  | 2014              |           |  | 2015              |  
|                               |  | NT$(In Thousands) |           |  | NT$(In Thousands) |  
|Employees compensation  Cash |  | $                 | 1,458,956 |  |                   | $ | 1,131,180 | 
|Directors remuneration        |  |                   | 10,812    |  |                   |   | 12,086    | 



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##### Table of Contents

The aforementioned 2014 employees compensation and remuneration to directors approved
during the stockholders meeting were consistent with the resolutions of meeting of Board of Directors on March 18, 2015.

Information
on the aforementioned employees compensation and remuneration to directors can be obtained from the Market Observation Post System on the website of the TWSE.



| | (19) | Net Other Operating Income and Expenses
| | ---- | ---------------------------------------



|                                                            |  |                                  |          |   |                   |   |          |                   |  |   |            |  
|----------------------------------------------------------- |  | -------------------------------- | -------- | - | ----------------- | - | -------- | ----------------- |  | - | ---------- | -
|                                                            |  | For the years ended December 31, |         
|                                                            |  | 2013                             |          |   | 2014              |   |          | 2015              | 
|                                                            |  | NT$(In Thousands)                |          |   | NT$(In Thousands) |   |          | NT$(In Thousands) | 
|Net rental loss from property                               |  | $                                | (38,665  | ) |                   | $ | (24,098  | )                 |  | $ | (84,492    | )
|Gain on disposal of property, plant and equipment           |  |                                  | 40,897   |   |                   |   | 81,811   |                   |  |   | 97,366     |  
|Impairment reversal (loss) of property, plant and equipment |  |                                  | 984      |   |                   |   | (596,678 | )                 |  |   | (1,021,010 | )
|Impairment loss of intangible assets                        |  |                                  | (57,677  | ) |                   |   |         |                   |  |   |           |  
|Others                                                      |  |                                  | (70,871  | ) |                   |   |         |                   |  |   | 44,402     |  
|                                                            |  |                                  |          |   |                   |   |          |                   |  |   |            |  
|Total                                                       |  | $                                | (125,332 | ) |                   | $ | (538,965 | )                 |  | $ | (963,734   | )
|                                                            |  |                                  |          |   |                   |   |          |                   |  |   |            |  



| | (20) | Non-Operating Income and Expenses
| | ---- | ---------------------------------



| | a. | Other income
| | -- | ------------



|                |  |                                  |           |  |                   |   |           |                   |  |   |           | 
|--------------- |  | -------------------------------- | --------- |  | ----------------- | - | --------- | ----------------- |  | - | --------- | 
|                |  | For the years ended December 31, |          
|                |  | 2013                             |           |  | 2014              |   |           | 2015              | 
|                |  | NT$(In Thousands)                |           |  | NT$(In Thousands) |   |           | NT$(In Thousands) | 
|Interest income |  |                                  |           |  |                   |   |           |                   |  |   |           | 
|Bank deposits   |  | $                                | 264,320   |  |                   | $ | 471,153   |                   |  | $ | 313,620   | 
|Others          |  |                                  | 37,406    |  |                   |   | 24,577    |                   |  |   | 42,464    | 
|Dividend income |  |                                  | 789,583   |  |                   |   | 706,719   |                   |  |   | 692,858   | 
|                |  |                                  |           |  |                   |   |           |                   |  |   |           | 
|Total           |  | $                                | 1,091,309 |  |                   | $ | 1,202,449 |                   |  | $ | 1,048,942 | 
|                |  |                                  |           |  |                   |   |           |                   |  |   |           | 



F-78



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##### Table of Contents

| | b. | Other gains and losses
| | -- | ----------------------



|                                                                                            |  |                                  |            |   |                    |   |           |                    |  |   |            |  
|------------------------------------------------------------------------------------------- |  | -------------------------------- | ---------- | - | ------------------ | - | --------- | ------------------ |  | - | ---------- | -
|                                                                                            |  | For the years ended December 31, |           
|                                                                                            |  | 2013                             |            |   | 2014               |   |           | 2015               | 
|                                                                                            |  | NT$
(In Thousands)               |            |   | NT$
(In Thousands) |   |           | NT$
(In Thousands) | 
|Gain on valuation of financial assets and liabilities at fair value through profit or
loss: |  |                                  |            |   |                    |   |           |                    |  |   |            |  
|Designated financial assets at fair value through profit or loss                            |  | $                                | 11,446     |   |                    | $ | 34,816    |                    |  | $ | 8,462      |  
|Financial assets held for trading                                                           |  |                                  |           |   |                    |   | 44,310    |                    |  |   |           |  
|Embedded derivative financial liabilities                                                   |  |                                  | 229,262    |   |                    |   | 60,064    |                    |  |   |           |  
|Loss on valuation of financial assets and liabilities at fair value through profit or
loss: |  |                                  |            |   |                    |   |           |                    |  |   |            |  
|Financial assets held for trading                                                           |  |                                  | (49,022    | ) |                    |   |          |                    |  |   | (21,020    | )
|Forward exchange contract                                                                   |  |                                  |           |   |                    |   | (84,962   | )                  |  |   | (81,895    | )
|Impairment loss:                                                                            |  |                                  |            |   |                    |   |           |                    |  |   |            |  
|Available-for-sale financial assets, noncurrent                                             |  |                                  | (1,132,353 | ) |                    |   | (176,958  | )                  |  |   | (1,238,932 | )
|Financial assets measured at cost, noncurrent                                               |  |                                  | (143,422   | ) |                    |   | (127,559  | )                  |  |   | (6,559     | )
|Gain on disposal of investments                                                             |  |                                  | 2,224,418  |   |                    |   | 2,445,259 |                    |  |   | 2,517,137  |  
|Others                                                                                      |  |                                  | 710,881    |   |                    |   | 474,163   |                    |  |   | 756,666    |  
|                                                                                            |  |                                  |            |   |                    |   |           |                    |  |   |            |  
|Total                                                                                       |  | $                                | 1,851,210  |   |                    | $ | 2,669,133 |                    |  | $ | 1,933,859  |  
|                                                                                            |  |                                  |            |   |                    |   |           |                    |  |   |            |  



F-79



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##### Table of Contents

| | c. | Finance costs
| | -- | -------------



|                   |  |                                  |         |  |                    |   |         |                    |  |   |         | 
|------------------ |  | -------------------------------- | ------- |  | ------------------ | - | ------- | ------------------ |  | - | ------- | 
|                   | 
|                   |  | For the years ended December 31, |        
|                   |  | 2013                             |         |  | 2014               |   |         | 2015               | 
|                   |  | NT$
(In Thousands)               |         |  | NT$
(In Thousands) |   |         | NT$
(In Thousands) | 
|Interest expenses  |  |                                  |         |  |                    |   |         |                    |  |   |         | 
|Bonds payable      |  | $                                | 356,586 |  |                    | $ | 465,577 |                    |  | $ | 290,132 | 
|Bank loans         |  |                                  | 239,438 |  |                    |   | 221,879 |                    |  |   | 180,068 | 
|Others             |  |                                  | 208     |  |                    |   | (278    | )                  |  |   | 110     | 
|Financial expenses |  |                                  | 82,174  |  |                    |   | 58,887  |                    |  |   | 53,555  | 
|                   |  |                                  |         |  |                    |   |         |                    |  |   |         | 
|Total              |  | $                                | 678,406 |  |                    | $ | 746,065 |                    |  | $ | 523,865 | 
|                   |  |                                  |         |  |                    |   |         |                    |  |   |         | 



| | (21) | Components of Other Comprehensive Income (Loss)
| | ---- | -----------------------------------------------



|                                                                                                                                     |  |                                      |           |  |                                             |   |            |                                            |  |   |                    |   |  |                                            |         |   |  |   |          |  
|------------------------------------------------------------------------------------------------------------------------------------ |  | ------------------------------------ | --------- |  | ------------------------------------------- | - | ---------- | ------------------------------------------ |  | - | ------------------ | - |  | ------------------------------------------ | ------- | - |  | - | -------- | -
|                                                                                                                                     |  | For the year ended December 31, 2013 |          
|                                                                                                                                     |  | Arising duringthe period             |           |  | Reclassificationadjustmentsduring theperiod |   |            | Othercomprehensiveincome (loss),before tax |  |   | Income taxeffect   |   |  | Othercomprehensiveincome (loss),net of tax |        
|                                                                                                                                     |  | NT$
(In Thousands)                   |           |  | NT$
(In Thousands)                          |   |            | NT$
(In Thousands)                         |  |   | NT$
(In Thousands) |   |  | NT$
(In Thousands)                         |        
|Items that will not be reclassified subsequently to profit or loss:                                                                  |  |                                      |           |  |                                             |   |            |                                            |  |   |                    |   | 
|Remeasurements of defined benefit pension plans                                                                                      |  | $                                    | 456,478   |  |                                             | $ |           |                                            |  | $ | 456,478            |   |  | $                                          | (77,623 | ) |  | $ | 378,855  |  
|Items that may be reclassified subsequently to profit or loss:                                                                       |  |                                      |           |  |                                             |   |            |                                            |  |   |                    |   |  |                                            |         |   |  |   |          |  
|Exchange differences on translation of foreign operations                                                                            |  |                                      | 1,416,910 |  |                                             |   | (1,571,523 | )                                          |  |   | (154,613           | ) |  |                                            | 424,551 |   |  |   | 269,938  |  
|Unrealized gain (loss) on available-for-sale financial assets                                                                        |  |                                      | 223,917   |  |                                             |   | (1,080,243 | )                                          |  |   | (856,326           | ) |  |                                            | 72,674  |   |  |   | (783,652 | )
|Share of other comprehensive income (loss) of associates and joint ventures which may be
reclassified subsequently to profit or loss |  |                                      | 381,170   |  |                                             |   | (18,679    | )                                          |  |   | 362,491            |   |  |                                            | (29,225 | ) |  |   | 333,266  |  
|                                                                                                                                     |  |                                      |           |  |                                             |   |            |                                            |  |   |                    |   |  |                                            |         |   |  |   |          |  
|Total other comprehensive income (loss)                                                                                              |  | $                                    | 2,478,475 |  |                                             | $ | (2,670,445 | )                                          |  | $ | (191,970           | ) |  | $                                          | 390,377 |   |  | $ | 198,407  |  
|                                                                                                                                     |  |                                      |           |  |                                             |   |            |                                            |  |   |                    |   |  |                                            |         |   |  |   |          |  



F-80



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##### Table of Contents

|                                                                                                                                     |  |                                      |           |   |                                             |   |            |                                            |  |   |                    |   |  |                                            |          |   |  |   |           |  
|------------------------------------------------------------------------------------------------------------------------------------ |  | ------------------------------------ | --------- | - | ------------------------------------------- | - | ---------- | ------------------------------------------ |  | - | ------------------ | - |  | ------------------------------------------ | -------- | - |  | - | --------- | -
|                                                                                                                                     |  | For the year ended December 31, 2014 |          
|                                                                                                                                     |  | Arising duringthe period             |           |   | Reclassificationadjustmentsduring theperiod |   |            | Othercomprehensiveincome (loss),before tax |  |   | Income taxeffect   |   |  | Othercomprehensiveincome (loss),net of tax |         
|                                                                                                                                     |  | NT$
(In Thousands)                   |           |   | NT$
(In Thousands)                          |   |            | NT$
(In Thousands)                         |  |   | NT$
(In Thousands) |   |  | NT$
(In Thousands)                         |         
|Items that will not be reclassified subsequently to profit or loss:                                                                  |  |                                      |           |   |                                             |   |            |                                            |  |   |                    |   |  |                                            |          |   | 
|Remeasurements of defined benefit pension plans                                                                                      |  | $                                    | (2,607    | ) |                                             | $ |           |                                            |  | $ | (2,607             | ) |  | $                                          | 521      |   |  | $ | (2,086    | )
|Items that may be reclassified subsequently to profit or loss:                                                                       |  |                                      |           |   |                                             |   |            |                                            |  |   |                    |   |  |                                            |          |   |  |   |           |  
|Exchange differences on translation of foreign operations                                                                            |  |                                      | 4,290,260 |   |                                             |   | (869       | )                                          |  |   | 4,289,391          |   |  |                                            | 40,380   |   |  |   | 4,329,771 |  
|Unrealized gain (loss) on available-for-sale financial assets                                                                        |  |                                      | 3,598,159 |   |                                             |   | (1,945,996 | )                                          |  |   | 1,652,163          |   |  |                                            | (187,652 | ) |  |   | 1,464,511 |  
|Share of other comprehensive income (loss) of associates and joint ventures which may be
reclassified subsequently to profit or loss |  |                                      | 312,815   |   |                                             |   | (727       | )                                          |  |   | 312,088            |   |  |                                            | (34,992  | ) |  |   | 277,096   |  
|                                                                                                                                     |  |                                      |           |   |                                             |   |            |                                            |  |   |                    |   |  |                                            |          |   |  |   |           |  
|Total other comprehensive income (loss)                                                                                              |  | $                                    | 8,198,627 |   |                                             | $ | (1,947,592 | )                                          |  | $ | 6,251,035          |   |  | $                                          | (181,743 | ) |  | $ | 6,069,292 |  
|                                                                                                                                     |  |                                      |           |   |                                             |   |            |                                            |  |   |                    |   |  |                                            |          |   |  |   |           |  



|                                                                                                                                     |  |                                      |            |   |                                             |   |          |                                            |  |   |                    |   |  |                                            |         |   |  |   |            |  
|------------------------------------------------------------------------------------------------------------------------------------ |  | ------------------------------------ | ---------- | - | ------------------------------------------- | - | -------- | ------------------------------------------ |  | - | ------------------ | - |  | ------------------------------------------ | ------- | - |  | - | ---------- | -
|                                                                                                                                     |  | For the year ended December 31, 2015 |           
|                                                                                                                                     |  | Arising duringthe period             |            |   | Reclassificationadjustmentsduring theperiod |   |          | Othercomprehensiveincome (loss),before tax |  |   | Income taxeffect   |   |  | Othercomprehensiveincome (loss),net of tax |        
|                                                                                                                                     |  | NT$
(In Thousands)                   |            |   | NT$
(In Thousands)                          |   |          | NT$
(In Thousands)                         |  |   | NT$
(In Thousands) |   |  | NT$
(In Thousands)                         |        
|Items that will not be reclassified subsequently to profit or loss:                                                                  |  |                                      |            |   |                                             |   |          |                                            |  |   |                    |   |  |                                            |         |   | 
|Remeasurements of defined benefit pension plans                                                                                      |  | $                                    | (40,200    | ) |                                             | $ |         |                                            |  | $ | (40,200            | ) |  | $                                          | 6,809   |   |  | $ | (33,391    | )
|Share of remeasurements of defined benefit plans of associates and joint ventures                                                    |  |                                      | (1,831     | ) |                                             |   |         |                                            |  |   | (1,831             | ) |  |                                            |        |   |  |   | (1,831     | )
|Items that may be reclassified subsequently to profit or loss:                                                                       |  |                                      |            |   |                                             |   |          |                                            |  |   |                    |   |  |                                            |         |   |  |   |            |  
|Exchange differences on translation of foreign operations                                                                            |  |                                      | 2,784,800  |   |                                             |   |         |                                            |  |   | 2,784,800          |   |  |                                            | (21,026 | ) |  |   | 2,763,774  |  
|Unrealized gain (loss) on available-for-sale financial assets                                                                        |  |                                      | (2,843,916 | ) |                                             |   | (916,291 | )                                          |  |   | (3,760,207         | ) |  |                                            | 281,203 |   |  |   | (3,479,004 | )
|Share of other comprehensive income (loss) of associates and joint ventures which may be
reclassified subsequently to profit or loss |  |                                      | (277,004   | ) |                                             |   | 677      |                                            |  |   | (276,327           | ) |  |                                            | (37,850 | ) |  |   | (314,177   | )
|                                                                                                                                     |  |                                      |            |   |                                             |   |          |                                            |  |   |                    |   |  |                                            |         |   |  |   |            |  
|Total other comprehensive income (loss)                                                                                              |  | $                                    | (378,151   | ) |                                             | $ | (915,614 | )                                          |  | $ | (1,293,765         | ) |  | $                                          | 229,136 |   |  | $ | (1,064,629 | )
|                                                                                                                                     |  |                                      |            |   |                                             |   |          |                                            |  |   |                    |   |  |                                            |         |   |  |   |            |  



F-81



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##### Table of Contents

| | (22) | Income Tax
| | ---- | ----------



| | a. | The major components of income tax expense for the years ended December 31, 2013, 2014 and 2015 were as follows:
| | -- | ----------------------------------------------------------------------------------------------------------------



| | i. | Income tax expense recorded in profit or loss
| | -- | ---------------------------------------------



|                                                                                                  |  |                                  |           |   |                    |   |            |                    |  |   |            |  
|------------------------------------------------------------------------------------------------- |  | -------------------------------- | --------- | - | ------------------ | - | ---------- | ------------------ |  | - | ---------- | -
|                                                                                                  |  | For the years ended December 31, |          
|                                                                                                  |  | 2013                             |           |   | 2014               |   |            | 2015               | 
|                                                                                                  |  | NT$
(In Thousands)               |           |   | NT$
(In Thousands) |   |            | NT$
(In Thousands) | 
|Current income tax expense (benefit):                                                             |  |                                  |           |   |                    |   |            |                    |  |   |            |  
|Current income tax charge                                                                         |  | $                                | 554,592   |   |                    | $ | 3,439,422  |                    |  | $ | 2,081,552  |  
|Adjustments in respect of current income tax of prior periods                                     |  |                                  | 55,318    |   |                    |   | (485,580   | )                  |  |   | (154,769   | )
|Deferred income tax expense (benefit):                                                            |  |                                  |           |   |                    |   |            |                    |  |   |            |  
|Deferred income tax related to origination and reversal of temporary differences                  |  |                                  | 1,086,871 |   |                    |   | (650,172   | )                  |  |   | (1,431,680 | )
|Deferred income tax related to recognition and derecognition of tax losses and unused tax
credits |  |                                  | 1,402,632 |   |                    |   | 1,924,919  |                    |  |   | 654,065    |  
|Adjustment of prior years deferred income tax                                                    |  |                                  | (201,548  | ) |                    |   | 307,661    |                    |  |   | (1,690     | )
|Deferred income tax arising from write-down or reversal of write-down of deferred tax
assets      |  |                                  | (641,031  | ) |                    |   | (1,411,135 | )                  |  |   | (119,978   | )
|                                                                                                  |  |                                  |           |   |                    |   |            |                    |  |   |            |  
|Income tax expense recorded in profit or loss                                                     |  | $                                | 2,256,834 |   |                    | $ | 3,125,115  |                    |  | $ | 1,027,500  |  
|                                                                                                  |  |                                  |           |   |                    |   |            |                    |  |   |            |  



F-82



---

##### Table of Contents

| | ii. | Income tax relating to components of other comprehensive income (loss)
| | --- | ----------------------------------------------------------------------

Items that will not
be reclassified:



|                                                                                                                                     |  |                                  |         |   |                |   |          |                |  |   |         |  
|------------------------------------------------------------------------------------------------------------------------------------ |  | -------------------------------- | ------- | - | -------------- | - | -------- | -------------- |  | - | ------- | -
|                                                                                                                                     |  | For the years ended December 31, |        
|                                                                                                                                     |  | 2013                             |         |   | 2014           |   |          | 2015           | 
|                                                                                                                                     |  | NT$                              |         |   | NT$            |   |          | NT$            | 
|                                                                                                                                     |  | (In Thousands)                   |         |   | (In Thousands) |   |          | (In Thousands) | 
|Remeasurements of defined benefit pension plans                                                                                      |  | $                                | (77,623 | ) |                | $ | 521      |                |  | $ | 6,809   |  
|                                                                                                                                     |  |                                  |         |   |                |   |          |                |  |   |         |  
|                                                                                                                                    
|Items that may be reclassified subsequently to profit or loss:                                                                       | 
|                                                                                                                                     | 
|                                                                                                                                     |  | For the years ended December 31, |        
|                                                                                                                                     |  | 2013                             |         |   | 2014           |   |          | 2015           | 
|                                                                                                                                     |  | NT$                              |         |   | NT$            |   |          | NT$            | 
|                                                                                                                                     |  | (In Thousands)                   |         |   | (In Thousands) |   |          | (In Thousands) | 
|Exchange differences on translation of foreign operations                                                                            |  | $                                | 424,551 |   |                | $ | 40,380   |                |  | $ | (21,026 | )
|Unrealized loss (gain) on available-for-sale financial assets                                                                        |  |                                  | 72,674  |   |                |   | (187,652 | )              |  |   | 281,203 |  
|Share of other comprehensive income (loss) of associates and joint ventures which may be
reclassified subsequently to profit or loss |  |                                  | (29,225 | ) |                |   | (34,992  | )              |  |   | (37,850 | )
|                                                                                                                                     |  |                                  |         |   |                |   |          |                |  |   |         |  
|Income tax relating to items that may be reclassified subsequently to profit or loss                                                 |  | $                                | 468,000 |   |                | $ | (182,264 | )              |  | $ | 222,327 |  
|                                                                                                                                     |  |                                  |         |   |                |   |          |                |  |   |         |  



F-83



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##### Table of Contents

| | iii. | Deferred income tax charged directly to equity
| | ---- | ----------------------------------------------



|                                                                                                                           |  |                                  |        |  |                |   |        |                |  |   |          |  
|-------------------------------------------------------------------------------------------------------------------------- |  | -------------------------------- | ------ |  | -------------- | - | ------ | -------------- |  | - | -------- | -
|                                                                                                                           |  | For the years ended December 31, |       
|                                                                                                                           |  | 2013                             |        |  | 2014           |   |        | 2015           | 
|                                                                                                                           |  | NT$                              |        |  | NT$            |   |        | NT$            | 
|                                                                                                                           |  | (In Thousands)                   |        |  | (In Thousands) |   |        | (In Thousands) | 
|Temporary differences arising from the initial recognition of the equity component separately from
the liability component |  | $                                | 16,406 |  |                | $ | 83,185 |                |  | $ | (322,001 | )
|Adjustments of changes in net assets of associates and joint ventures accounted for using equity
method                    |  |                                  | 1,237  |  |                |   | (2,870 | )              |  |   | 1,040    |  
|                                                                                                                           |  |                                  |        |  |                |   |        |                |  |   |          |  
|Income tax charged directly to equity                                                                                      |  | $                                | 17,643 |  |                | $ | 80,315 |                |  | $ | (320,961 | )
|                                                                                                                           |  |                                  |        |  |                |   |        |                |  |   |          |  



| | b. | A reconciliation between income tax expense and income before tax at UMCs applicable tax rate was as follows:
| | -- | --------------------------------------------------------------------------------------------------------------



|                                                                     |  |                                  |            |   |                |   |            |                |  |   |            |  
|-------------------------------------------------------------------- |  | -------------------------------- | ---------- | - | -------------- | - | ---------- | -------------- |  | - | ---------- | -
|                                                                     |  | For the years ended December 31, |           
|                                                                     |  | 2013                             |            |   | 2014           |   |            | 2015           | 
|                                                                     |  | NT$                              |            |   | NT$            |   |            | NT$            | 
|                                                                     |  | (In Thousands)                   |            |   | (In Thousands) |   |            | (In Thousands) | 
|Income before tax                                                    |  | $                                | 14,340,472 |   |                | $ | 13,572,303 |                |  | $ | 13,668,598 |  
|                                                                     |  |                                  |            |   |                |   |            |                |  |   |            |  
|At UMCs statutory income tax rate of 17%                            |  |                                  | 2,437,880  |   |                |   | 2,307,291  |                |  |   | 2,323,662  |  
|Adjustments in respect of current income tax of prior periods        |  |                                  | 55,318     |   |                |   | (485,580   | )              |  |   | (154,769   | )
|Net change in loss carry-forward and investment tax credits          |  |                                  | 1,837,319  |   |                |   | 212,862    |                |  |   | 705,857    |  
|Recognition and derecognition of temporary differences               |  |                                  | (396,514   | ) |                |   | 427,605    |                |  |   | 11,421     |  
|Tax effect of non-taxable income and non-deductible expenses:        |  |                                  |            |   |                |   |            |                |  |   |            |  
|Tax exempt income                                                    |  |                                  | (97,322    | ) |                |   | (328,456   | )              |  |   | (1,649,709 | )
|Investment gain                                                      |  |                                  | (1,744,070 | ) |                |   | (266,413   | )              |  |   | (1,196,376 | )
|Dividend income                                                      |  |                                  | (107,915   | ) |                |   | (107,436   | )              |  |   | (90,201    | )
|Others                                                               |  |                                  | 240,408    |   |                |   | (181,598   | )              |  |   | 354,485    |  
|Basic tax                                                            |  |                                  |           |   |                |   | 16,379     |                |  |   |           |  
|Estimated 10% income tax on unappropriated earnings                  |  |                                  |           |   |                |   | 1,092,466  |                |  |   | 344,932    |  
|Effect of different tax rates applicable to UMC and its subsidiaries |  |                                  | (52,235    | ) |                |   | (13,833    | )              |  |   | (6,225     | )
|Taxes withheld in other jurisdictions                                |  |                                  | 46,257     |   |                |   | 382,912    |                |  |   | 16,629     |  
|Others                                                               |  |                                  | 37,708     |   |                |   | 68,916     |                |  |   | 367,794    |  
|                                                                     |  |                                  |            |   |                |   |            |                |  |   |            |  
|Income tax expense recorded in profit or loss                        |  | $                                | 2,256,834  |   |                | $ | 3,125,115  |                |  | $ | 1,027,500  |  
|                                                                     |  |                                  |            |   |                |   |            |                |  |   |            |  



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| | c. | Significant components of deferred income tax assets and liabilities were as follows:
| | -- | -------------------------------------------------------------------------------------



|                                          |  |                    |             |   |                    |   |            |        |  |   |             |   |  |   |            |  
|----------------------------------------- |  | ------------------ | ----------- | - | ------------------ | - | ---------- | ------ |  | - | ----------- | - |  | - | ---------- | -
|                                          |  | As of December 31, |            
|                                          |  | 2014               |             |   | 2015               |  
|                                          |  | Amount             |             |   | Tax effect         |   |            | Amount |  |   | Tax effect  |  
|                                          |  | NT$
(In Thousands) |             |   | NT$
(In Thousands) |  
|Deferred income tax assets                |  |                    |             |   |                    |   |            |        |  |   |             |   |  |   |            |  
|Investment tax credits                    |  |                    |             |   |                    | $ | 528,390    |        |  |   |             |   |  | $ |           |  
|Depreciation                              |  | $                  | 3,262,978   |   |                    |   | 493,580    |        |  | $ | 5,541,838   |   |  |   | 881,603    |  
|Loss carry-forward                        |  |                    | 10,293      |   |                    |   | 910        |        |  |   | 17,475      |   |  |   | 2,231      |  
|Pension                                   |  |                    | 3,800,509   |   |                    |   | 646,087    |        |  |   | 3,861,009   |   |  |   | 656,372    |  
|Allowance for sales returns and discounts |  |                    | 697,343     |   |                    |   | 118,548    |        |  |   | 1,007,449   |   |  |   | 171,266    |  
|Allowance for inventory valuation losses  |  |                    | 1,273,730   |   |                    |   | 212,525    |        |  |   | 1,755,537   |   |  |   | 294,284    |  
|Investment loss                           |  |                    | 1,154,706   |   |                    |   | 215,782    |        |  |   | 1,079,356   |   |  |   | 208,802    |  
|Others                                    |  |                    | 207,426     |   |                    |   | 51,316     |        |  |   | 532,635     |   |  |   | 108,684    |  
|                                          |  |                    |             |   |                    |   |            |        |  |   |             |   |  |   |            |  
|Total deferred income tax assets          |  |                    |             |   |                    |   | 2,267,138  |        |  |   |             |   |  |   | 2,323,242  |  
|                                          |  |                    |             |   |                    |   |            |        |  |   |             |   |  |   |            |  
|                                          |  |                    |             |  
|Deferred income tax liabilities           |  |                    |             |   |                    |   |            |        |  |   |             |   |  |   |            |  
|Unrealized exchange gain                  |  |                    | (1,652,483  | ) |                    |   | (280,922   | )      |  |   | (1,960,967  | ) |  |   | (333,364   | )
|Depreciation                              |  |                    | (6,527,694  | ) |                    |   | (1,088,314 | )      |  |   | (1,036,606  | ) |  |   | (155,491   | )
|Investment gain                           |  |                    | (13,287,787 | ) |                    |   | (1,358,836 | )      |  |   | (10,246,059 | ) |  |   | (1,195,474 | )
|Convertible bond option                   |  |                    |            |   |                    |   |           |        |  |   | (1,695,120  | ) |  |   | (288,170   | )
|Amortizable assets                        |  |                    | (2,714,290  | ) |                    |   | (407,144   | )      |  |   | (2,742,811  | ) |  |   | (411,422   | )
|Others                                    |  |                    | (36,113     | ) |                    |   | (5,035     | )      |  |   | (12,818     | ) |  |   | (2,179     | )
|                                          |  |                    |             |   |                    |   |            |        |  |   |             |   |  |   |            |  
|Total deferred income tax liabilities     |  |                    |             |   |                    |   | (3,140,251 | )      |  |   |             |   |  |   | (2,386,100 | )
|                                          |  |                    |             |   |                    |   |            |        |  |   |             |   |  |   |            |  
|Net deferred income tax liabilities       |  |                    |             |   |                    | $ | (873,113   | )      |  |   |             |   |  | $ | (62,858    | )
|                                          |  |                    |             |   |                    |   |            |        |  |   |             |   |  |   |            |  



F-85



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##### Table of Contents

| | d. | Movement of deferred tax
| | -- | ------------------------



|                                                       |  |                                 |          |   |                   |   |          |  
|------------------------------------------------------ |  | ------------------------------- | -------- | - | ----------------- | - | -------- | -
|                                                       |  | For the years endedDecember 31, |         
|                                                       |  | 2014                            |          |   | 2015              |  
|                                                       |  | NT$(In Thousands)               |          |   | NT$(In Thousands) |  
|Balance at January 1                                   |  | $                               | (601,175 | ) |                   | $ | (873,113 | )
|Amounts recognized in profit or loss during the period |  |                                 | (171,273 | ) |                   |   | 899,283  |  
|Amounts recognized in other comprehensive income       |  |                                 | (181,743 | ) |                   |   | 229,136  |  
|Amounts recognized in equity                           |  |                                 | 80,315   |   |                   |   | (320,961 | )
|Exchange adjustments                                   |  |                                 | 763      |   |                   |   | 2,797    |  
|                                                       |  |                                 |          |   |                   |   |          |  
|Balance at December 31                                 |  | $                               | (873,113 | ) |                   | $ | (62,858  | )
|                                                       |  |                                 |          |   |                   |   |          |  



| | e. | The Company is subject to taxation in Taiwan and other foreign jurisdictions. As of December 31, 2015, income tax returns of UMC and its subsidiaries in Taiwan have been examined by the tax authorities through 2013
and 2011, respectively, while in other foreign jurisdictions, relevant tax authorities have completed the examination through 2009. UMC has applied for a recheck of the 2011, 2012 and 2013 tax returns to the competent tax collection authorities
as UMC disagreed with the decision made in the tax assessment notices.
| | -- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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| | f. | UMC was granted several income tax exemption periods with respect to income derived from the expansion of operations. The income tax exemption periods will expire on December 31, 2020.
| | -- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | g. | The Companys unused investment tax credits were as follows:
| | -- | ------------------------------------------------------------

As of December 31, 2014



|                |  |                               |         |  |                                         |   |         | 
|--------------- |  | ----------------------------- | ------- |  | --------------------------------------- | - | ------- | 
|Expiration year |  | Investment tax credits earned |         |  | Balance of unusedinvestment tax credits |  
|                |  | NT$
(In Thousands)            |         |  | NT$
(In Thousands)                      |  
|2015            |  | $                             | 584,388 |  |                                         | $ | 584,388 | 
|2016            |  |                               | 5,596   |  |                                         |   | 5,596   | 
|                |  |                               |         |  |                                         |   |         | 
|                |  | $                             | 589,984 |  |                                         | $ | 589,984 | 
|                |  |                               |         |  |                                         |   |         | 

As of December 31, 2015



|                |  |                               |       |  |                                         |   |       | 
|--------------- |  | ----------------------------- | ----- |  | --------------------------------------- | - | ----- | 
|Expiration year |  | Investment tax credits earned |       |  | Balance of unusedinvestment tax credits |  
|                |  | NT$
(In Thousands)            |       |  | NT$
(In Thousands)                      |  
|2016            |  | $                             | 5,596 |  |                                         | $ | 5,589 | 
|                |  |                               |       |  |                                         |   |       | 



| | h. | The unutilized accumulated losses for the Company were as follows:
| | -- | ------------------------------------------------------------------

As of December 31,
2014



|                   |  |                  |            |  |                            |   |            | 
|------------------ |  | ---------------- | ---------- |  | -------------------------- | - | ---------- | 
|Expiration year    |  | Accumulated loss |            |  | Unutilizedaccumulated loss |  
|                   |  | NT$              |            |  | NT$                        |  
|                   |  | (In Thousands)   |            |  | (In Thousands)             |  
|2015               |  | $                | 149,181    |  |                            | $ | 149,181    | 
|2016               |  |                  | 21,616     |  |                            |   | 21,616     | 
|2017               |  |                  | 15,844     |  |                            |   | 15,844     | 
|2018               |  |                  | 165,258    |  |                            |   | 98,221     | 
|2019               |  |                  | 600,180    |  |                            |   | 600,180    | 
|2020               |  |                  | 799,425    |  |                            |   | 782,733    | 
|2021               |  |                  | 2,334,290  |  |                            |   | 2,334,290  | 
|2022               |  |                  | 4,402,106  |  |                            |   | 4,393,980  | 
|2023               |  |                  | 5,838,447  |  |                            |   | 5,838,447  | 
|2024               |  |                  | 2,641,015  |  |                            |   | 2,641,015  | 
|2032               |  |                  | 7,578      |  |                            |   | 6,396      | 
|Unlimited duration |  |                  | 5,524      |  |                            |   | 5,524      | 
|                   |  |                  |            |  |                            |   |            | 
|                   |  | $                | 16,980,464 |  |                            | $ | 16,887,427 | 
|                   |  |                  |            |  |                            |   |            | 



F-87



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##### Table of Contents

As of December 31, 2015



|                   |  |                  |            |  |                            |   |            | 
|------------------ |  | ---------------- | ---------- |  | -------------------------- | - | ---------- | 
|Expiration year    |  | Accumulated loss |            |  | Unutilizedaccumulated loss |  
|                   |  | NT$              |            |  | NT$                        |  
|                   |  | (In Thousands)   |            |  | (In Thousands)             |  
|2016               |  | $                | 21,616     |  |                            | $ | 21,616     | 
|2017               |  |                  | 15,844     |  |                            |   | 15,844     | 
|2018               |  |                  | 165,258    |  |                            |   | 98,221     | 
|2019               |  |                  | 600,180    |  |                            |   | 600,180    | 
|2020               |  |                  | 799,425    |  |                            |   | 782,909    | 
|2021               |  |                  | 1,184,838  |  |                            |   | 1,184,838  | 
|2022               |  |                  | 2,296,589  |  |                            |   | 2,288,463  | 
|2023               |  |                  | 4,843,921  |  |                            |   | 4,843,921  | 
|2024               |  |                  | 2,689,506  |  |                            |   | 2,689,506  | 
|2025               |  |                  | 2,826,695  |  |                            |   | 2,826,695  | 
|2031               |  |                  | 2,570      |  |                            |   | 2,570      | 
|2032               |  |                  | 7,864      |  |                            |   | 6,260      | 
|2035               |  |                  | 1,894      |  |                            |   | 1,894      | 
|Unlimited duration |  |                  | 5,141      |  |                            |   | 5,141      | 
|                   |  |                  |            |  |                            |   |            | 
|                   |  | $                | 15,461,341 |  |                            | $ | 15,368,058 | 
|                   |  |                  |            |  |                            |   |            | 



F-88



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##### Table of Contents

| | i. | As of December 31, 2014 and 2015, deferred tax assets that have not been recognized as they may not be used to offset taxable profits amounted to NT$3,410 million and NT$3,163 million, respectively.
| | -- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | j. | Imputation credit information
| | -- | -----------------------------



|                                      |  |                    |           |  |                |   |           | 
|------------------------------------- |  | ------------------ | --------- |  | -------------- | - | --------- | 
|                                      |  | As of December 31, |          
|                                      |  | 2014               |           |  | 2015           |  
|                                      |  | NT$                |           |  | NT$            |  
|                                      |  | (In Thousands)     |           |  | (In Thousands) |  
|Balances of imputation credit amounts |  | $                  | 1,332,236 |  |                | $ | 2,656,855 | 
|                                      |  |                    |           |  |                |   |           | 

The actual creditable ratio for 2014 and the expected creditable ratio for 2015 were 6.81% and 6.18%,
respectively. Effective from January 1, 2015, imputation credit ratio for individual stockholders residing in R.O.C. will be half of the original ratio according to the revised Article 66-6 of Income Tax Act.



| | k. | UMCs earnings generated in the year ended December 31, 1997 and prior years have been fully appropriated.
| | -- | ----------------------------------------------------------------------------------------------------------



| | l. | As of December 31, 2014 and 2015, the taxable temporary differences of unrecognized deferred tax liabilities associated with investments in subsidiaries amounted to NT$10,233 million and NT$12,793 million, respectively.
| | -- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (23) | Earnings Per Share
| | ---- | ------------------



| | a. | Earnings per share-basic
| | -- | ------------------------

Basic earnings per share amounts are calculated by dividing the net
income for the year attributable to ordinary equity holders of the parent company by the weighted-average number of ordinary shares outstanding during the year. The reciprocal stockholdings held by subsidiaries and associates are deducted from
the computation of weighted-average number of shares outstanding.



|                                                                                          |  |                                  |            |  |                |   |            |                |  |   |            | 
|----------------------------------------------------------------------------------------- |  | -------------------------------- | ---------- |  | -------------- | - | ---------- | -------------- |  | - | ---------- | 
|                                                                                          |  | For the years ended December 31, |           
|                                                                                          |  | 2013                             |            |  | 2014           |   |            | 2015           | 
|                                                                                          |  | NT$                              |            |  | NT$            |   |            | NT$            | 
|                                                                                          |  | (In Thousands)                   |            |  | (In Thousands) |   |            | (In Thousands) | 
|Net income attributable to the parent company                                             |  | $                                | 12,608,881 |  |                | $ | 11,108,940 |                |  | $ | 13,254,071 | 
|                                                                                          |  |                                  |            |  |                |   |            |                |  |   |            | 
|Weighted-average number of ordinary shares for basic earnings per share (thousand shares) |  |                                  | 12,346,456 |  |                |   | 12,333,913 |                |  |   | 12,336,388 | 
|                                                                                          |  |                                  |            |  |                |   |            |                |  |   |            | 
|Earnings per share-basic (NTD)                                                            |  | $                                | 1.02       |  |                | $ | 0.90       |                |  | $ | 1.07       | 
|                                                                                          |  |                                  |            |  |                |   |            |                |  |   |            | 



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##### Table of Contents

| | b. | Earnings per share-diluted
| | -- | --------------------------

Diluted earnings per share is calculated by taking basic earnings
per share plus the effect of additional common shares that would have been outstanding if the dilutive share equivalents had been issued. The net income attributable to ordinary equity holders of the parent company would be also adjusted for
the interest and other income or expenses derived from any underlying dilutive share equivalents, such as convertible bonds. For employees compensation that may be distributed in shares, the number of shares to be distributed is taken
into consideration assuming the distribution will be made entirely in shares when calculating diluted earnings per share. Additionally, the dilutive effect of outstanding employee options generally should be reflected in diluted earnings per
share by application of treasury stock method. The assumed proceeds include the exercise price of the options and the average measured but unrecognized compensation expense during the period.



|                                                                                        |  |                                  |            |  |                |   |            |                |  |   |            | 
|--------------------------------------------------------------------------------------- |  | -------------------------------- | ---------- |  | -------------- | - | ---------- | -------------- |  | - | ---------- | 
|                                                                                        |  | For the years ended December 31, |           
|                                                                                        |  | 2013                             |            |  | 2014           |   |            | 2015           | 
|                                                                                        |  | NT$                              |            |  | NT$            |   |            | NT$            | 
|                                                                                        |  | (In Thousands)                   |            |  | (In Thousands) |   |            | (In Thousands) | 
|Net income attributable to the parent company                                           |  | $                                | 12,608,881 |  |                | $ | 11,108,940 |                |  | $ | 13,254,071 | 
|Effect of dilution                                                                      |  |                                  |            |  |                |   |            |                |  |   |            | 
|Unsecured convertible bonds                                                             |  |                                  | 79,686     |  |                |   | 189,336    |                |  |   | 172,592    | 
|                                                                                        |  |                                  |            |  |                |   |            |                |  |   |            | 
|Income attributable to the Companys stockholders                                       |  | $                                | 12,688,567 |  |                | $ | 11,298,276 |                |  | $ | 13,426,663 | 
|                                                                                        |  |                                  |            |  |                |   |            |                |  |   |            | 
|Weighted-average number of common stocks for basic earnings per share (thousand shares) |  |                                  | 12,346,456 |  |                |   | 12,333,913 |                |  |   | 12,336,388 | 
|Effect of dilution                                                                      |  |                                  |            |  |                |   |            |                |  |   |            | 
|Employees compensation                                                                 |  |                                  | 128,787    |  |                |   | 135,940    |                |  |   | 143,726    | 
|Employee stock options                                                                  |  |                                  | 15,949     |  |                |   | 15,751     |                |  |   | 3,199      | 
|Unsecured convertible bonds                                                             |  |                                  | 659,219    |  |                |   | 232,989    |                |  |   | 687,493    | 
|                                                                                        |  |                                  |            |  |                |   |            |                |  |   |            | 
|Weighted-average number of common stocks after dilution (thousand shares)               |  |                                  | 13,150,411 |  |                |   | 12,718,593 |                |  |   | 13,170,806 | 
|                                                                                        |  |                                  |            |  |                |   |            |                |  |   |            | 
|                                                                                        |  |                                  |           
|Diluted earnings per share (NTD)                                                        |  | $                                | 0.96       |  |                | $ | 0.89       |                |  | $ | 1.02       | 
|                                                                                        |  |                                  |            |  |                |   |            |                |  |   |            | 



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##### Table of Contents

| | (24) | Business Combinations
| | ---- | ---------------------

Acquisition of BEST ELITE INTERNATIONAL LIMITED (BEST ELITE)

The Company acquired additional stocks of Ordinary shares, Series A-1, Series B and B-1 preferred shares representing 48.07% of BEST
ELITEs total outstanding shares on February 1, 2013 from stockholders of BEST ELITE, the holding company of HEJIAN TECHNOLOGY (SUZHOU) CO., LTD. (HEJIAN). Therefore, the Company increased its ownership interest in BEST ELITE from 35.03%
to 83.10%. The Company obtained control over BEST ELITE and the results of BEST ELITEs operations have been included in the consolidated financial statements since that date. As a result of the acquisition, the Company expects to expand
overseas market, accelerate the growth of sales and to develop operations in multiple strategic geographic regions through HeJian.

The
fair values of the identifiable assets and liabilities of BEST ELITE as of the date of acquisition were:



|                              |  |                                     |            |  
|----------------------------- |  | ----------------------------------- | ---------- | -
|                              |  | Fair value recognizedon acquisition |           
|                              |  | NT$                                 |           
|                              |  | (In Thousands)                      |           
|Assets                        |  |                                     |            |  
|Cash and cash equivalents     |  | $                                   | 7,018,229  |  
|Accounts receivable           |  |                                     | 1,180,790  |  
|Inventories                   |  |                                     | 725,688    |  
|Property, plant and equipment |  |                                     | 6,318,208  |  
|Intangible assets             |  |                                     | 43,858     |  
|Deferred tax assets           |  |                                     | 433,427    |  
|Other assets                  |  |                                     | 2,853,479  |  
|Others                        |  |                                     | 234,050    |  
|                              |  |                                     |            |  
|                              |  |                                     | 18,807,729 |  
|                              |  |                                     |            |  
|Liabilities                   |  |                                     |            |  
|Accounts payable              |  |                                     | (312,922   | )
|Other payables                |  |                                     | (588,621   | )
|Deferred tax liabilities      |  |                                     | (565,691   | )
|Others                        |  |                                     | (48,653    | )
|                              |  |                                     |            |  
|                              |  |                                     | (1,515,887 | )
|                              |  |                                     |            |  
|Total identifiable net assets |  | $                                   | 17,291,842 |  
|                              |  |                                     |            |  



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Gain on bargain purchase:



|                                            |  |                  |             |  
|------------------------------------------- |  | ---------------- | ----------- | -
|                                            |  | Acquisition date |            
|                                            |  | NT$              |            
|                                            |  | (In Thousands)   |            
|Consideration transferred                   |  | $                | 7,328,163   |  
|Add: Value of non-controlling interests     |  |                  | 2,823,193   |  
|Less: Fair value of identifiable net assets |  |                  | (17,291,842 | )
|                                            |  |                  |             |  
|Bargain purchase gain                       |  | $                | (7,140,486  | )
|                                            |  |                  |             |  

The transaction resulted in a bargain purchase gain, which was mainly attributed to the expectation that with
the Companys unique position as a market leading foundry, the Company could better utilize BEST ELITEs assets, and the lack of liquidity of BEST ELITEs shares. The Company integrated its operating resources with BEST ELITE to reach
cooperative synergy, providing enhanced manufacturing solutions to customers that increase the competiveness of their products. BEST ELITEs operational efficiency has improved with the integration of its assets with the Companys
advanced technologies and manufacturing platforms as well as leveraging the groups purchasing power, which led to BEST ELITEs operating income to increase gradually since 2013.

The Company elected to measure the non-controlling interests in BEST ELITE at the non-controlling interests proportionate share of BEST
ELITEs identifiable net assets.

Prior to the acquisition date, the Company accounted for its 35.03% interest in BEST ELITE as an
equity-method investment. The Company remeasured the fair value of the previously held equity interest and recognized a loss from disposal of investments of NT$987 million for the year ended December 31, 2013.



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The amounts of revenue and profit before tax of BEST ELITE included in the Companys
consolidated income statement from the acquisition date to the year ended December 31, 2013 were NT$6,636 million and NT$1,161 million, respectively. The pro forma revenue and the profit before tax were NT$124,410 million and NT$14,252 million,
respectively, as if BEST ELITE had been included in the consolidated results of the Company for the entire year of 2013.

Consideration
transferred:



|                                                            |  |                |           | 
|----------------------------------------------------------- |  | -------------- | --------- | 
|                                                            |  | NT$            |          
|                                                            |  | (In Thousands) |          
|Cash                                                        |  | $              | 4,359,660 | 
|Value of previously held equity interest before acquisition |  |                | 2,968,503 | 
|                                                            |  |                |           | 
|Total                                                       |  | $              | 7,328,163 | 
|                                                            |  |                |           | 

Cash flows analysis of acquisition:



|                                      |  |                                     |            |  
|------------------------------------- |  | ----------------------------------- | ---------- | -
|                                      |  | For the year endedDecember 31, 2013 |           
|                                      |  | NT$                                 |           
|                                      |  | (In Thousands)                      |           
|Cash consideration                    |  | $                                   | 4,359,660  |  
|Net cash acquired from the subsidiary |  |                                     | (7,018,229 | )
|                                      |  |                                     |            |  
|Net cash inflows from acquisition     |  | $                                   | (2,658,569 | )
|                                      |  |                                     |            |  

Additional purchases of BEST ELITEs equity interests

After obtaining control over BEST ELITE in 2013, the Company purchased additional ordinary shares, Series A-1, Series B and Series B-1
preferred shares representing 7.96% of BEST ELITEs total outstanding shares, and increased its cumulative ownership in BEST ELITE to 91.06% as of December 31, 2015. The difference between the consideration paid to the non-controlling
interest stockholders and the carrying amount of the interest acquired was recognized in additional paid-in capital within equity.

Obtained controlling interests in ALLIANCE OPTOTEK CORP. (ALLIANCE)

On May 2, 2013, due to the possible future success of LED lighting industry, the Company acquired additional stocks issued by ALLIANCE, which
increased the Companys ownership interest from 47.99% to 74.51%. The Company obtained control over ALLIANCE and the results of ALLIANCEs operations have been included in the consolidated financial statements since that date.



F-93



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The fair values of identifiable assets and liabilities of ALLIANCE as of the date of acquisition
were:



|                              |  |                                     |         |  
|----------------------------- |  | ----------------------------------- | ------- | -
|                              |  | Fair value recognizedon acquisition |        
|                              |  | NT$                                 |        
|                              |  | (In Thousands)                      |        
|Assets                        |  |                                     |         |  
|Cash and cash equivalents     |  | $                                   | 65,045  |  
|Accounts receivable           |  |                                     | 15,482  |  
|Inventories                   |  |                                     | 45,732  |  
|Property, plant and equipment |  |                                     | 7,683   |  
|Intangible assets             |  |                                     | 63,257  |  
|Others                        |  |                                     | 7,006   |  
|                              |  |                                     |         |  
|                              |  |                                     | 204,205 |  
|                              |  |                                     |         |  
|Liabilities                   |  |                                     |         |  
|Short-term loans              |  |                                     | (25,000 | )
|Notes and accounts payable    |  |                                     | (9,403  | )
|Other payables                |  |                                     | (12,681 | )
|Others                        |  |                                     | (1,388  | )
|                              |  |                                     |         |  
|                              |  |                                     | (48,472 | )
|                              |  |                                     |         |  
|Total identifiable net assets |  | $                                   | 155,733 |  
|                              |  |                                     |         |  

Gain on bargain purchase:



|                                            |  |                  |          |  
|------------------------------------------- |  | ---------------- | -------- | -
|                                            |  | Acquisition date |         
|                                            |  | NT$              |         
|                                            |  | (In Thousands)   |         
|Consideration transferred                   |  | $                | 103,002  |  
|Add: Value of non-controlling interest      |  |                  | 39,688   |  
|Less: Fair value of identifiable net assets |  |                  | (155,733 | )
|                                            |  |                  |          |  
|Bargain purchase gain                       |  | $                | (13,043  | )
|                                            |  |                  |          |  

The Company elected to measure the non-controlling interests in ALLIANCE at the non-controlling interests
proportionate share of ALLIANCEs identifiable net assets.

Prior to the acquisition date, the Company accounted for its 47.99%
interest in ALLIANCE as an equity-method investment. For the year ended December 31, 2013, the Company remeasured the fair value of the previously held equity interest and recognized a gain from disposal of investments of NT$19 million.



F-94



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The amounts of revenue and loss of ALLIANCE included in the Companys consolidated income
statement from the acquisition date to the year ended December 31, 2013 were NT$65 million and NT$113 million, respectively. The pro forma revenue and the profit before tax were NT$123,837 million and NT$14,333 million, respectively, as if
ALLIANCE had been included in the consolidated results of the Company for the entire year of 2013.

Consideration transferred:



|                                                            |  |                |         | 
|----------------------------------------------------------- |  | -------------- | ------- | 
|                                                            |  | NT$            |        
|                                                            |  | (In Thousands) |        
|Cash                                                        |  | $              | 74,000  | 
|Value of previously held equity interest before acquisition |  |                | 29,002  | 
|                                                            |  |                |         | 
|Total                                                       |  | $              | 103,002 | 
|                                                            |  |                |         | 

Cash flows analysis of acquisition:



|                                      |  |                                     |         |  
|------------------------------------- |  | ----------------------------------- | ------- | -
|                                      |  | For the year endedDecember 31, 2013 |        
|                                      |  | NT$                                 |        
|                                      |  | (In Thousands)                      |        
|Cash consideration                    |  | $                                   | 74,000  |  
|Net cash acquired from the subsidiary |  |                                     | (65,045 | )
|                                      |  |                                     |         |  
|Net cash outflows from acquisition    |  | $                                   | 8,955   |  
|                                      |  |                                     |         |  



| | (25) | Deconsolidation of Subsidiaries
| | ---- | -------------------------------

UMC JAPAN (UMCJ)

In November 2013, the Company lost control over UMCJ due to the Company selling 100% shares of UMCJ to a third party, MACH SEMICONDUCTOR CO.;
accordingly, the Company derecognized the related assets and liabilities of UMCJ.



| | a. | Assets and liabilities of UMCJ over which the Company lost control:
| | -- | -------------------------------------------------------------------



|                                |  |                |          |  
|------------------------------- |  | -------------- | -------- | -
|                                |  | NT$            |         
|                                |  | (In Thousands) |         
|Assets                          |  |                |          |  
|Cash and cash equivalents       |  | $              | 141,501  |  
|Accounts receivable             |  |                | 603      |  
|Property, plant and equipment   |  |                | 758,993  |  
|Others                          |  |                | 26,677   |  
|                                |  |                |          |  
|                                |  |                | 927,774  |  
|                                |  |                |          |  
|Liabilities                     |  |                |          |  
|Accounts payable                |  |                | (75,201  | )
|Net defined benefit liabilities |  |                | (18,218  | )
|Others                          |  |                | (22,522  | )
|                                |  |                |          |  
|                                |  |                | (115,941 | )
|                                |  |                |          |  
|Net assets deconsolidated       |  | $              | 811,833  |  
|                                |  |                |          |  



F-95



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| | b. | Consideration received and gain recognized from the transaction:
| | -- | ----------------------------------------------------------------



|                                                                         |  |                |           |  
|------------------------------------------------------------------------ |  | -------------- | --------- | -
|                                                                         |  | NT$            |          
|                                                                         |  | (In Thousands) |          
|Cash received                                                            |  | $              | 48,217    |  
|Less: Net assets of the subsidiary deconsolidated (based on ownership %) |  |                | (811,833  | )
|Amounts transferred from other comprehensive income to profit            |  |                | 1,571,489 |  
|Amounts transferred from deferred unrealized gain to profit              |  |                | 30,497    |  
|Other amounts transferred to profit                                      |  |                | 1,484     |  
|                                                                         |  |                |           |  
|Gain on disposal of the subsidiary                                       |  | $              | 839,854   |  
|                                                                         |  |                |           |  

The gain on disposal of the subsidiary was recognized as non-operating income and expenses in the consolidated
statement of comprehensive income for the year ended December 31, 2013.



| | c. | Analysis of net cash outflow arising from deconsolidation of the subsidiary:
| | -- | ----------------------------------------------------------------------------



|                                      |  |                |          |  
|------------------------------------- |  | -------------- | -------- | -
|                                      |  | NT$            |         
|                                      |  | (In Thousands) |         
|Cash received                         |  | $              | 48,217   |  
|Net cash of subsidiary derecognized   |  |                | (141,501 | )
|                                      |  |                |          |  
|Net cash outflow from deconsolidation |  | $              | (93,284  | )
|                                      |  |                |          |  



F-96



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ALLIANCE OPTOTEK CORP. (ALLIANCE)

In order to integrate resources and expand operations to improve operating performance and industrial competitiveness, ALLIANCEs Board of
Directors (ALLIANCE, one of the Companys subsidiaries) resolved merger with WIESON TECHNOLOGIES CO., LTD. (WIESON) on January 23, 2014. WIESON was the surviving company and the merger date was June 3, 2014. ALLIANCEs assets and
liabilities were reclassified to non-current assets held for sale as a disposal group as of January 23, 2014 until the Company derecognized the related assets and liabilities of ALLIANCE on June 3, 2014.



| | a. | Derecognized assets and liabilities mainly consisted of:
| | -- | --------------------------------------------------------



|                                          |  |                |         |  
|----------------------------------------- |  | -------------- | ------- | -
|                                          |  | NT$            |        
|                                          |  | (In Thousands) |        
|Assets                                    |  |                |         |  
|Cash and cash equivalents                 |  | $              | 15,617  |  
|Notes and accounts receivable             |  |                | 14,239  |  
|Inventories                               |  |                | 24,165  |  
|Property, plant and equipment             |  |                | 6,669   |  
|Others                                    |  |                | 6,418   |  
|                                          |  |                |         |  
|                                          |  |                | 67,108  |  
|                                          |  |                |         |  
|Liabilities                               |  |                |         |  
|Payables                                  |  |                | (22,984 | )
|Others                                    |  |                | (120    | )
|                                          |  |                |         |  
|                                          |  |                | (23,104 | )
|                                          |  |                |         |  
|Net carrying amount of the disposal group |  | $              | 44,004  |  
|                                          |  |                |         |  



| | b. | Consideration received and gain recognized from the transaction:
| | -- | ----------------------------------------------------------------



|                                                              |  |                |         |  
|------------------------------------------------------------- |  | -------------- | ------- | -
|                                                              |  | NT$            |        
|                                                              |  | (In Thousands) |        
|Stock received  WIESON                                       |  | $              | 32,148  |  
|Less: Net assets of the subsidiary deconsolidated             |  |                | (44,004 | )
|Add: Non-controlling interests                                |  |                | 11,214  |  
|Amounts transferred from other comprehensive income to profit |  |                | 869     |  
|                                                              |  |                |         |  
|Gain on disposal of the shares of subsidiary                  |  | $              | 227     |  
|                                                              |  |                |         |  

Gain on disposal of the shares of subsidiary for the year ended December 31, 2014 was recognized as other gains
and losses in the consolidated statement of comprehensive income.



F-97



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| | c. | Analysis of net cash outflow arising from deconsolidation of the subsidiary:
| | -- | ----------------------------------------------------------------------------



|                                      |  |                |         |  
|------------------------------------- |  | -------------- | ------- | -
|                                      |  | NT$            |        
|                                      |  | (In Thousands) |        
|Cash received                         |  | $              |        |  
|Net cash of subsidiary derecognized   |  |                | (15,617 | )
|                                      |  |                |         |  
|Net cash outflow from deconsolidation |  | $              | (15,617 | )
|                                      |  |                |         |  

TOPCELL SOLAR INTERNATIONAL CO., LTD. (TOPCELL)

In order to integrate resources and reduce operating cost by improving operating performance and expanding economies of scale, TOPCELLs
Board of Directors (TOPCELL, one of the Companys subsidiaries) resolved to offer a merger with MOTECH INDUSTRIES, INC. (MOTECH) on December 26, 2014. Six shares of TOPCELL were exchanged for one share of MOTECH. MOTECH was the surviving
company and the merger date was June 1, 2015. TOPCELLs assets and liabilities were reclassified to non-current assets held for sale as a disposal group as of December 31, 2014 until the Company derecognized the related assets and liabilities
of TOPCELL on June 1, 2015. This disposal group was classified under new business segment.



| | a. | Assets and liabilities reclassified to non-current assets held for sale as a disposal group mainly consisted of:
| | -- | ----------------------------------------------------------------------------------------------------------------



|                                          |  |                   |            |  
|----------------------------------------- |  | ----------------- | ---------- | -
|                                          |  | As of             |           
|                                          |  | December 31, 2014 |           
|                                          |  | NT$               |           
|                                          |  | (In Thousands)    |           
|Assets                                    |  |                   |            |  
|Cash and cash equivalents                 |  | $                 | 511,088    |  
|Notes and accounts receivable             |  |                   | 758,839    |  
|Other receivables                         |  |                   | 77,579     |  
|Inventories                               |  |                   | 823,249    |  
|Prepayments                               |  |                   | 325,605    |  
|Non-current assets held for sale          |  |                   | 600,663    |  
|Property, plant and equipment             |  |                   | 3,821,601  |  
|Others                                    |  |                   | 60,367     |  
|                                          |  |                   |            |  
|                                          |  |                   | 6,978,991  |  
|                                          |  |                   |            |  
|Liabilities                               |  |                   |            |  
|Short-term loans                          |  |                   | (2,807,292 | )
|Notes and accounts payable                |  |                   | (623,501   | )
|Other payables                            |  |                   | (217,350   | )
|Payables on equipment                     |  |                   | (158,537   | )
|Current portion of long-term liabilities  |  |                   | (1,164,878 | )
|Other current liabilities                 |  |                   | (205,530   | )
|Long-term loans                           |  |                   | (417,762   | )
|                                          |  |                   |            |  
|                                          |  |                   | (5,594,850 | )
|                                          |  |                   |            |  
|Net carrying amount of the disposal group |  | $                 | 1,384,141  |  
|                                          |  |                   |            |  



F-98



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##### Table of Contents

| | b. | The following are TOPCELLs derecognized information:
| | -- | -----------------------------------------------------



| | i. | Derecognized assets and liabilities mainly consisted of:
| | -- | --------------------------------------------------------



|                                          |  |                |            |  
|----------------------------------------- |  | -------------- | ---------- | -
|                                          |  | NT$            |           
|                                          |  | (In Thousands) |           
|Assets                                    |  |                |            |  
|Cash and cash equivalents                 |  | $              | 834,955    |  
|Notes and accounts receivable             |  |                | 855,927    |  
|Other receivables                         |  |                | 60,638     |  
|Inventories                               |  |                | 495,726    |  
|Prepayments                               |  |                | 231,288    |  
|Property, plant and equipment             |  |                | 3,862,129  |  
|Others                                    |  |                | 106,714    |  
|                                          |  |                |            |  
|                                          |  |                | 6,447,377  |  
|                                          |  |                |            |  
|Liabilities                               |  |                |            |  
|Short-term loans                          |  |                | (3,488,700 | )
|Notes and accounts payable                |  |                | (409,244   | )
|Other payables                            |  |                | (197,259   | )
|Payables on equipment                     |  |                | (127,297   | )
|Current portion of long-term liabilities  |  |                | (810,878   | )
|Other current liabilities                 |  |                | (10,107    | )
|Long-term loans                           |  |                | (176,470   | )
|                                          |  |                |            |  
|                                          |  |                | (5,219,955 | )
|                                          |  |                |            |  
|Net carrying amount of the disposal group |  | $              | 1,227,422  |  
|                                          |  |                |            |  



| | ii. | Consideration received and gain recognized from the transaction:
| | --- | ----------------------------------------------------------------



|                                                  |  |                |            |  
|------------------------------------------------- |  | -------------- | ---------- | -
|                                                  |  | NT$            |           
|                                                  |  | (In Thousands) |           
|Stock received  MOTECH                           |  | $              | 1,495,023  |  
|Less: Net assets of the subsidiary deconsolidated |  |                | (1,227,422 | )
|Add: Non-controlling interests                    |  |                | 100,400    |  
|Less: Goodwill                                    |  |                | (43,072    | )
|                                                  |  |                |            |  
|Gain on disposal of the shares of subsidiary      |  | $              | 324,929    |  
|                                                  |  |                |            |  



F-99



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##### Table of Contents

Gain on disposal of the shares of subsidiary for the year ended December 31, 2015 was recognized
as other gains and losses in the consolidated statement of comprehensive income.



| | iii. | Analysis of net cash outflow arising from deconsolidation of the subsidiary:
| | ---- | ----------------------------------------------------------------------------



|                                      |  |                |          |  
|------------------------------------- |  | -------------- | -------- | -
|                                      |  | NT$            |         
|                                      |  | (In Thousands) |         
|Cash received                         |  | $              |         |  
|Net cash of subsidiary derecognized   |  |                | (834,955 | )
|                                      |  |                |          |  
|Net cash outflow from deconsolidation |  | $              | (834,955 | )
|                                      |  |                |          |  



|7. | SIGNIFICANT RELATED PARTY TRANSACTIONS
|-- | --------------------------------------



| | a. | Significant intercompany transactions between consolidated entities were as follows:
| | -- | ------------------------------------------------------------------------------------

For
the year ended December 31, 2013



|       |  |                 |  |                       |  |                |            |  |               |            
|------ |  | --------------- |  | --------------------- |  | -------------- | ---------- |  | ------------- | -----------
|       |  |                 |  | Transactions (Note 1)
|Entity |  | Counterparty    |  | Account               |  | Amount         |            |  | Terms(Note 3)
|       |  |                 |  |                       |  | NT$            |            |  |              
|       |  |                 |  |                       |  | (In Thousands) |            |  |              
|UMC    |  | UMC-USA         |  | Sales                 |  | $              | 52,581,667 |  |               | Net 60 days
|       |  |                 |  |                      
|UMC    |  | UMC-USA         |  | Accounts receivable   |  |                | 5,599,526  |  |               |           
|       |  |                 |  |                      
|UMC    |  | UMCJ            |  | Sales                 |  |                | 403,888    |  |               | Net 60 days
|       |  |                 |  |                      
|UMC    |  | UMC GROUP JAPAN |  | Sales                 |  |                | 3,885,762  |  |               | Net 60 days
|       |  |                 |  |                      
|UMC    |  | UMC GROUP JAPAN |  | Accounts receivable   |  |                | 845,690    |  |               |           



F-100



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##### Table of Contents

For the year ended December 31, 2014



|       |  |                 |  |                       |  |                |            |  |               |            
|------ |  | --------------- |  | --------------------- |  | -------------- | ---------- |  | ------------- | -----------
|       |  |                 |  | Transactions (Note 1)
|Entity |  | Counterparty    |  | Account               |  | Amount         |            |  | Terms(Note 3)
|       |  |                 |  |                       |  | NT$            |            |  |              
|       |  |                 |  |                       |  | (In Thousands) |            |  |              
|UMC    |  | UMC-USA         |  | Sales                 |  | $              | 56,095,440 |  |               | Net 60 days
|       |  |                 |  |                      
|UMC    |  | UMC-USA         |  | Accounts receivable   |  |                | 7,191,171  |  |               |           
|       |  |                 |  |                      
|UMC    |  | UMC GROUP JAPAN |  | Sales                 |  |                | 5,527,537  |  |               | Net 60 days
|       |  |                 |  |                      
|UMC    |  | UMC GROUP JAPAN |  | Accounts receivable   |  |                | 1,205,059  |  |               |           

For the year ended December 31, 2015



|        |  |                 |  |                       |  |                |            |  |               |            
|------- |  | --------------- |  | --------------------- |  | -------------- | ---------- |  | ------------- | -----------
|        |  |                 |  | Transactions (Note 2)
|Entity  |  | Counterparty    |  | Account               |  | Amount         |            |  | Terms(Note 3)
|        |  |                 |  |                       |  | NT$            |            |  |              
|        |  |                 |  |                       |  | (In Thousands) |            |  |              
|UMC     |  | UMC-USA         |  | Sales                 |  | $              | 62,952,979 |  |               | Net 60 days
|        |  |                 |  |                      
|UMC     |  | UMC-USA         |  | Accounts receivable   |  |                | 7,615,622  |  |               |           
|        |  |                 |  |                      
|UMC     |  | UMC GROUP JAPAN |  | Sales                 |  |                | 9,716,823  |  |               | Net 60 days
|        |  |                 |  |                      
|UMC     |  | UMC GROUP JAPAN |  | Accounts receivable   |  |                | 2,299,403  |  |               |           
|        |  |                 |  |                      
|WAVETEK |  | UMC             |  | Sales                 |  |                | 928,335    |  |               | Net 30 days
|        |  |                 |  |                      
|WAVETEK |  | UMC             |  | Accounts receivable   |  |                | 128,809    |  |               |           
|        |  |                 |  |                      
|HEJIAN  |  | UMC-USA         |  | Sales                 |  |                | 657,149    |  |               | Net 60 days
|        |  |                 |  |                      
|HEJIAN  |  | UMC-USA         |  | Accounts receivable   |  |                | 108,932    |  |               |           
|        |  |                 |  |                      
|HEJIAN  |  | UMC GROUP JAPAN |  | Sales                 |  |                | 151,935    |  |               | Net 60 days
|        |  |                 |  |                      
|HEJIAN  |  | UMC GROUP JAPAN |  | Accounts receivable   |  |                | 16,480     |  |               |           



|Note 1: | All the significant intercompany transactions listed above are downstream transactions.
|------- | ---------------------------------------------------------------------------------------



F-101



---

##### Table of Contents

|Note 2: | The significant intercompany transactions listed above include downstream and upstream transactions.
|------- | ----------------------------------------------------------------------------------------------------



|Note 3: | The sales price to the above related parties was determined through mutual agreement in reference to market conditions.
|------- | -----------------------------------------------------------------------------------------------------------------------



| | b. | Significant transactions between the Company and other related parties were as follows:
| | -- | ---------------------------------------------------------------------------------------



| | (i) | Operating revenues
| | --- | ------------------



|                               |  |                                  |         |  |                |   |         |                |  |   |           | 
|------------------------------ |  | -------------------------------- | ------- |  | -------------- | - | ------- | -------------- |  | - | --------- | 
|                               |  | For the years ended December 31, |        
|                               |  | 2013                             |         |  | 2014           |   |         | 2015           | 
|                               |  | NT$                              |         |  | NT$            |   |         | NT$            | 
|                               |  | (In Thousands)                   |         |  | (In Thousands) |   |         | (In Thousands) | 
|Associates                     |  | $                                | 4,942   |  |                | $ | 120     |                |  | $ | 1,132,831 | 
|Joint ventures                 |  |                                  | 51,154  |  |                |   | 46,230  |                |  |   | 14,224    | 
|Other related parties (Note A) |  |                                  | 156,004 |  |                |   | 117,674 |                |  |   | 7,228     | 
|                               |  |                                  |         |  |                |   |         |                |  |   |           | 
|Total                          |  | $                                | 212,100 |  |                | $ | 164,024 |                |  | $ | 1,154,283 | 
|                               |  |                                  |         |  |                |   |         |                |  |   |           | 



| | Note A: | Transactions with other related parties are primarily from the operating transactions with SILICON INTEGRATED SYSTEMS CORP. (SIS). The amounts for the years ended December 31, 2013, 2014 and 2015 were NT$156
million, NT$117 million and NT$7 million, respectively.
| | ------- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (ii) | Accounts receivable, net
| | ---- | ------------------------



|                                                |  |                    |        |   |                |   |         |  
|----------------------------------------------- |  | ------------------ | ------ | - | -------------- | - | ------- | -
|                                                |  | As of December 31, |       
|                                                |  | 2014               |        |   | 2015           |  
|                                                |  | NT$                |        |   | NT$            |  
|                                                |  | (In Thousands)     |        |   | (In Thousands) |  
|Associates                                      |  | $                  |       |   |                | $ | 215,402 |  
|Joint ventures                                  |  |                    | 18,164 |   |                |   | 1,161   |  
|Other related parties (Note B)                  |  |                    | 18,127 |   |                |   | 1,834   |  
|                                                |  |                    |        |   |                |   |         |  
|Total                                           |  |                    | 36,291 |   |                |   | 218,397 |  
|Less: Allowance for sales returns and discounts |  |                    | (269   | ) |                |   | (4,937  | )
|                                                |  |                    |        |   |                |   |         |  
|Net                                             |  | $                  | 36,022 |   |                | $ | 213,460 |  
|                                                |  |                    |        |   |                |   |         |  



| | Note B: | Balances of other related parties are accounts receivables primarily from SIS. As of December 31, 2014 and 2015, the balances were NT$17 million and NT$2 million, respectively.
| | ------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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The sales price to the above related parties was determined through mutual agreement in
reference to market conditions. The collection periods for domestic sales to related parties were month-end 45~60 days, while the term for overseas sales was net 60 days.



| | (iii) | Significant asset transactions
| | ----- | ------------------------------

Acquisition of intangible assets



For the years ended December 31,Purchase price2013


2014


2015NT$


NT$


NT$(In Thousands)


(In Thousands)


(In Thousands)Associates

$



$



$
129,327


Acquisition of available-for-sale financial assets, noncurrent



TradingVolume(In thousandsof shares)


Transaction
underlying

For the years ended December 312013


2014


2015NT$


NT$


NT$(In Thousands)


(In Thousands)


(In Thousands)Associates


50,500


BEAUTY ESSENTIALS INTERNATIONAL LTD.

$
104,919


$



$



Disposal of available-for-sale financial assets, noncurrent



TradingVolume(In thousandsof shares)


Transaction
underlying

For the year ended December 31, 2015Disposal amount


Disposal gainNT$


NT$(In Thousands)


(In Thousands)Associates


336


DRAMEXCHANGE TECH. INC.

$
5,400


$
2,346




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For the years ended December 31, 2013 and 2014: nil.



| | c. | Key management personnel compensation
| | -- | -------------------------------------



|                             |  |                                  |         |  |                |   |         |                |  |   |         | 
|---------------------------- |  | -------------------------------- | ------- |  | -------------- | - | ------- | -------------- |  | - | ------- | 
|                             |  | For the years ended December 31, |        
|                             |  | 2013                             |         |  | 2014           |   |         | 2015           | 
|                             |  | NT$                              |         |  | NT$            |   |         | NT$            | 
|                             |  | (In Thousands)                   |         |  | (In Thousands) |   |         | (In Thousands) | 
|Short-term employee benefits |  | $                                | 221,530 |  |                | $ | 212,111 |                |  | $ | 292,282 | 
|Post-employment benefits     |  |                                  | 3,062   |  |                |   | 2,789   |                |  |   | 2,953   | 
|Termination benefits         |  |                                  |        |  |                |   | 1,029   |                |  |   | 1,582   | 
|Share-based payments         |  |                                  | 1,935   |  |                |   | 12,256  |                |  |   | 5,772   | 
|Others                       |  |                                  | 932     |  |                |   | 467     |                |  |   | 1,039   | 
|                             |  |                                  |         |  |                |   |         |                |  |   |         | 
|Total                        |  | $                                | 227,459 |  |                | $ | 228,652 |                |  | $ | 303,628 | 
|                             |  |                                  |         |  |                |   |         |                |  |   |         | 



|8. | ASSETS PLEDGED AS COLLATERAL
|-- | ----------------------------



|                                   |  |                    |           |  |                |   |           |                                     |  |                                                                                                                                                                                                               |  |                                              
|---------------------------------- |  | ------------------ | --------- |  | -------------- | - | --------- | ----------------------------------- |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |  | ---------------------------------------------
|                                   |  | As of December 31, |           |  |                |   |          
|                                   |  | 2014               |           |  | 2015           |   |           | Party to which asset(s) was pledged |  | Purpose of pledge                                                                                                                                                                                            
|                                   |  | NT$                |           |  | NT$            |   |           |                                     |  |                                                                                                                                                                                                              
|                                   |  | (In Thousands)     |           |  | (In Thousands) |   |           |                                     |  |                                                                                                                                                                                                              
|Refundable Deposits (Time deposit) |  | $                  | 815,119   |  |                | $ | 815,159   |                                     |  | Customs                                                                                                                                                                                                       |  | Customs duty guarantee                       
|Refundable Deposits (Time deposit) |  |                    | 158,094   |  |                |   | 207,510   |                                     |  | Science Park Administration                                                                                                                                                                                   |  | Collateral for land lease                    
|Refundable Deposits (Time deposit) |  |                    | 53,202    |  |                |   | 49,785    |                                     |  | Liquefied Natural Gas Business Division, CPC Corporation, Taiwan                                                                                                                                              |  | Energy resources guarantee                   
|Refundable Deposits (Time deposit) |  |                    | 870       |  |                |   | 870       |                                     |  | National Pingtung University of Science and Technology                                                                                                                                                        |  | Guarantee for engineering project            
|Refundable Deposits (Time deposit) |  |                    | 357       |  |                |   | 357       |                                     |  | National Pei-men Senior High School                                                                                                                                                                           |  | Guarantee for engineering project            
|Refundable Deposits (Time deposit) |  |                    | 1,246     |  |                |   | 286       |                                     |  | Bureau of Energy, Ministry of Economic Affairs                                                                                                                                                                |  | Energy resources guarantee                   
|Buildings                          |  |                    | 1,074,856 |  |                |   | 145,493   |                                     |  | Cooperative Bank, Syndicated Loans from Bank of Taiwan and 7 others and Syndicated Loans from
Taiwan Cooperative Bank and 5 others                                                                            |  | Collateral for long-term loans               
|Machinery and equipment            |  |                    | 4,764,493 |  |                |   | 414,275   |                                     |  | Bank of Taiwan, Cooperative Bank, First Commercial Bank, Mega International Commercial Bank,
Syndicated Loans from Bank of Taiwan and 7 others and Syndicated Loans from Taiwan Cooperative Bank and 5 others |  | Collateral for long-term and short-term loans
|Furniture and fixtures             |  |                    | 36,217    |  |                |   |          |                                     |  | Syndicated Loans from Bank of Taiwan and 7 others and Syndicated Loans from Taiwan Cooperative
Bank and 5 others                                                                                              |  | Collateral for long-term loans               
|                                   |  |                    |           |  |                |   |           |                                     |  |                                                                                                                                                                                                               |  |                                              
|Total                              |  | $                  | 6,904,454 |  |                | $ | 1,633,735 |                                     |  |                                                                                                                                                                                                               |  |                                              
|                                   |  |                    |           |  |                |   |           |                                     |  |                                                                                                                                                                                                               |  |                                              



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|9. | SIGNIFICANT CONTINGENCIES AND UNRECOGNIZED CONTRACT COMMITMENTS
|-- | ---------------------------------------------------------------



| | (1) | The Company entered into several patent license agreements and development contracts of intellectual property for a total contract amount of approximately NT$20.1 billion. As of December 31, 2015, the portion of
royalties and development fees not yet recognized was NT$6.1 billion.
| | --- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (2) | The Company entered into several construction contracts for the expansion of its factory premise. As of December 31, 2015, these construction contracts amounted to approximately NT$26.9 billion and the portion of
the contracts not yet recognized was approximately NT$12.8 billion.
| | --- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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| | (3) | The Company entered into several operating lease contracts for land and office. These renewable operating leases will expire in various years through 2034. Future minimum lease payments under those leases are
as follows:
| | --- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|                    |  |                        |           | 
|------------------- |  | ---------------------- | --------- | 
|Year                |  | As ofDecember 31, 2015 |          
|                    |  | NT$                    |          
|                    |  | (In Thousands)         |          
|2016                |  | $                      | 347,595   | 
|2017                |  |                        | 304,870   | 
|2018                |  |                        | 242,266   | 
|2019                |  |                        | 242,802   | 
|2020                |  |                        | 244,957   | 
|2021 and thereafter |  |                        | 2,569,304 | 
|                    |  |                        |           | 
|Total               |  | $                      | 3,951,794 | 
|                    |  |                        |           | 



| | (4) | The Board of Directors of UMC resolved to participate in a 3-way agreement with Xiamen Municipal Peoples Government and FUJIAN ELECTRONICS & INFORMATION GROUP to form a company which will focus on
12 wafer foundry services. Based on the agreement, UMC will submit an investment application with R.O.C. government authorities for approval to invest in the company established by Xiamen Municipal Peoples Government and FUJIAN
ELECTRONICS & INFORMATION GROUP. The Company anticipates that its investment could reach approximately US$1.4 billion in the next five years, with instalment funding starting in 2015. On December 31, 2014, UMC obtained R.O.C. government
authoritys approval of the investment application for US$0.7 billion (including indirect investment). In January 2015, the Company invested RMB 0.6 billion and obtained the control over United Semiconductor (XIAMEN) CO., LTD. by acquiring
more than half of the seats of the Board of Directors. Furthermore, according to the agreement, UMC recognized a financial liability in other noncurrent liabilities, for repurchase from Xiamen Municipal Peoples Government and FUJIAN
ELECTRONICS & INFORMATION GROUP their investments in the company at their original investment cost plus interest, beginning from the seventh year following the last instalment payment made by Xiamen Municipal Peoples Government and FUJIAN
ELECTRONICS & INFORMATION GROUP.
| | --- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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|10. | SIGNIFICANT SUBSEQUENT EVENTS
|--- | -----------------------------



| | (1) | On February 6, 2016, an earthquake with a magnitude of 6.4 Richter struck southern Taiwan. As a result, the Companys automated production equipment in FAB 12A located in Southern Taiwan Science Park was shut down
and wafers in progress were affected; however, normal operation are resuming after repair. After the deduction of risk retention and deductible amounts, the Company will claim the remaining from the insurance company according to the insurance
contract for losses endured due to the earthquake. Therefore, the Company anticipated that there will not be any material impact on the operation and finance of the Company.
| | --- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | (2) | On March 16, 2016, the Board of Directors of UMC approved an investment in private equity of WISE ROAD INVESTMENT MANAGEMENT COMPANY, with total amount not more than US$50 million. No investment has been made as
the date of this filing.
| | --- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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|11. | FINANCIAL RISK AND FAIR VALUE DISCLOSURES
|--- | -----------------------------------------



| | (1) | Categories of financial instruments
| | --- | -----------------------------------



|                                                                 |  |                    |             |  |                |   |             | 
|---------------------------------------------------------------- |  | ------------------ | ----------- |  | -------------- | - | ----------- | 
|                                                                 |  | As of December 31, |            
|Financial Assets                                                 |  | 2014               |             |  | 2015           |  
|                                                                 |  | NT$                |             |  | NT$            |  
|                                                                 |  | (In Thousands)     |             |  | (In Thousands) |  
|Non-derivative financial instruments                             |  |                    |             |  |                |   |             | 
|Financial assets at fair value through profit or loss            |  |                    |             |  |                |   |             | 
|Designated financial assets at fair value through profit or loss |  | $                  | 150,550     |  |                | $ | 295,708     | 
|Financial assets held for trading                                |  |                    | 634,811     |  |                |   | 450,135     | 
|                                                                 |  |                    |             |  |                |   |             | 
|Subtotal                                                         |  |                    | 785,361     |  |                |   | 745,843     | 
|                                                                 |  |                    |             |  |                |   |             | 
|Available-for-sale financial assets                              |  |                    | 24,362,104  |  |                |   | 23,800,686  | 
|                                                                 |  |                    |             |  |                |   |             | 
|Financial assets measured at cost                                |  |                    | 3,833,006   |  |                |   | 3,888,309   | 
|                                                                 |  |                    |             |  |                |   |             | 
|Loans and receivables                                            |  |                    |             |  |                |   |             | 
|Cash and cash equivalents (excludes cash on hand)                |  |                    | 45,697,457  |  |                |   | 53,286,490  | 
|Receivables                                                      |  |                    | 23,027,843  |  |                |   | 19,964,707  | 
|Refundable deposits                                              |  |                    | 1,145,843   |  |                |   | 2,638,788   | 
|Other financial assets, current                                  |  |                    | 3,134,870   |  |                |   | 1,066,447   | 
|                                                                 |  |                    |             |  |                |   |             | 
|Subtotal                                                         |  |                    | 73,006,013  |  |                |   | 76,956,432  | 
|                                                                 |  |                    |             |  |                |   |             | 
|Derivative financial instruments                                 |  |                    |             |  |                |   |             | 
|Financial assets at fair value through profit or loss            |  |                    |             |  |                |   |             | 
|Forward exchange contracts                                       |  |                    |            |  |                |   | 1,008       | 
|                                                                 |  |                    |             |  |                |   |             | 
|Total                                                            |  | $                  | 101,986,484 |  |                | $ | 105,392,278 | 
|                                                                 |  |                    |             |  |                |   |             | 
|                                                                 | 
|                                                                 |  | As of December 31, |            
|Financial Liabilities                                            |  | 2014               |             |  | 2015           |  
|                                                                 |  | NT$                |             |  | NT$            |  
|                                                                 |  | (In Thousands)     |             |  | (In Thousands) |  
|Non-derivative financial instruments                             |  |                    |             |  |                |   |             | 
|Financial liabilities measured at amortized cost                 |  |                    |             |  |                |   |             | 
|Short-term loans                                                 |  | $                  | 6,250,754   |  |                | $ | 5,505,049   | 
|Payables                                                         |  |                    | 29,172,157  |  |                |   | 33,242,615  | 
|Capacity deposit (current portion included)                      |  |                    | 70,200      |  |                |   | 358,887     | 
|Bonds payable                                                    |  |                    | 24,977,820  |  |                |   | 41,636,670  | 
|Long-term loans (current portion included)                       |  |                    | 12,198,456  |  |                |   | 12,489,458  | 
|Other financial liabilities-noncurrent                           |  |                    |            |  |                |   | 6,056,742   | 
|                                                                 |  |                    |             |  |                |   |             | 
|Subtotal                                                         |  |                    | 72,669,387  |  |                |   | 99,289,421  | 
|                                                                 |  |                    |             |  |                |   |             | 
|Derivative financial instruments                                 |  |                    |             |  |                |   |             | 
|Financial liabilities at fair value through profit or loss       |  |                    |             |  |                |   |             | 
|Forward exchange contracts                                       |  |                    | 42,354      |  |                |   | 999         | 
|                                                                 |  |                    |             |  |                |   |             | 
|Total                                                            |  | $                  | 72,711,741  |  |                | $ | 99,290,420  | 
|                                                                 |  |                    |             |  |                |   |             | 



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| | (2) | Financial risk management objectives and policies
| | --- | -------------------------------------------------

The Companys risk management
objectives are to manage the market risk, credit risk and liquidity risk related to its operating activities. The Company identifies, measures and manages the aforementioned risks based on policy and risk preference.

The Company has established appropriate policies, procedures and internal controls for financial risk management. Before entering into
significant financial activities, approval process by the Board of Directors and Audit Committee must be carried out based on related protocols and internal control procedures. The Company complies with its financial risk management policies at
all times.



| | (3) | Market risk
| | --- | -----------

Market risk is the risk that the fair value or future cash flows of a financial
instrument will fluctuate because of changes in market prices. Market risks comprise currency risk, interest rate risk and other price risk (such as equity price risk).

Foreign currency risk

The Companys exposure to the risk of changes in foreign exchange rates relates primarily to the Companys operating activities (when
revenue or expense is denominated in a different currency from the Companys functional currency) and the Companys net investments in foreign subsidiaries.

The Company applies natural hedges on the foreign currency risk arising from purchases or sales, and utilizes spot or forward exchange
contracts to avoid foreign currency risk and the net effect of the risks related to monetary financial assets and liabilities is minor. The notional amounts of the foreign currency contracts are the same as the amount of the hedged
items. In principle, the Company does not carry out any forward exchange contracts for uncertain commitments. Furthermore, as net investments in foreign subsidiaries are for strategic purposes, they are not hedged by the Company.

The foreign currency sensitivity analysis of the possible change in foreign exchange rates on the Companys profit is performed on
significant monetary items denominated in foreign currencies as of the end of the reporting period. When NTD strengthens/weakens against USD by 10%, the profit for the years ended December 31, 2013, 2014 and 2015 increases/decreases by NT$172
million, NT$189 million and NT$186 million, respectively.



F-109



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##### Table of Contents

Interest rate risk

The Company is exposed to interest rate risk arising from borrowing at floating interest rates. All of the Companys bonds have fixed
interest rates and are measured at amortized cost. As such, changes in interest rates would not affect the future cash flows. On the other hand, as the interest rates of the Companys short-term and long-term bank loans are floating, changes in
interest rates would affect the future cash flows but not the fair value. Please refer to Note 6(10), 6(12) and 6(13) for the range of interest rate of the Companys bonds and bank loans.

At the reporting dates, a change of 10 basis points of interest rate in a reporting period could cause the profit for the years ended December
31, 2013, 2014 and 2015 to decrease/increase by NT$16 million, NT$18 million and NT$18 million, respectively.

Equity price risk

The Companys listed and unlisted equity securities are susceptible to market price risk arising from uncertainties about future
performance of equity markets. The Companys listed equity investments are classified as financial assets at fair value through profit or loss and available-for-sale financial assets, while unlisted equity securities are classified as
available-for-sale financial assets which are subsequently measured using a valuation model and financial assets measured at cost.

The
sensitivity analysis for the equity instruments is based on the change in fair value as of the reporting date. A change of 5% in the price of the aforementioned financial assets at fair value through profit or loss could increase/decrease the
Companys profit for the years ended December 31, 2013, 2014 and 2015 by NT$12 million, NT$12 million and NT$13 million, respectively. A change of 5% in the price of the aforementioned available-for-sale financial instrument could
increase/decrease the Companys other comprehensive income for the years ended December 31, 2013, 2014 and 2015 by NT$1,083 million, NT$1,217 million and NT$1,150 million, respectively.



| | (4) | Credit risk management
| | --- | ----------------------

The Company only trades with approved and creditworthy third
parties. Where the Company trades with third parties which have less favorable financial positions, it will request collateral from them. It is the Companys policy that all customers who wish to trade on credit terms are subject to credit
verification procedures. In addition, notes and accounts receivable balances are monitored on an ongoing basis, which consequently minimizes the Companys exposure to bad debts.



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##### Table of Contents

The Company mitigates the credit risks from financial institutions by limiting its counter
parties to only reputable domestic or international financial institutions with good credit standing and spreading its holdings among various financial institutions. The Companys exposure to credit risk arising from the default of
counter-parties is limited to the carrying amount of these instruments.

As of December 31, 2014 and 2015, accounts receivables from the
top ten customers represent 57% and 58% of the total accounts receivables of the Company, respectively. The credit concentration risk of other accounts receivables is insignificant.



| | (5) | Liquidity risk management
| | --- | -------------------------

The Companys objectives are to maintain a balance between
continuity of funding and flexibility through the use of cash and cash equivalents, bank loans and bonds.

The table below summarizes the
maturity profile of the Companys financial liabilities based on the contractual undiscounted payments and contractual maturity:



|                                     |  |                         |            |  |                |   |            |                |  |   |                |  |  |                |           |  |  |   |            | 
|------------------------------------ |  | ----------------------- | ---------- |  | -------------- | - | ---------- | -------------- |  | - | -------------- |  |  | -------------- | --------- |  |  | - | ---------- | 
|                                     |  | As of December 31, 2014 |           
|                                     |  | Less than1 year         |            |  | 2 to 3years    |   |            | 4 to 5years    |  |   | > 5 years      |  |  | Total          |          
|                                     |  | NT$                     |            |  | NT$            |   |            | NT$            |  |   | NT$            |  |  | NT$            |          
|                                     |  | (In Thousands)          |            |  | (In Thousands) |   |            | (In Thousands) |  |   | (In Thousands) |  |  | (In Thousands) |          
|Non-derivative financial liabilities |  |                         |            |  |                |   |            |                |  |   |                |  |  |                |           |  |  |   |            | 
|Short-term loans                     |  | $                       | 6,299,905  |  |                | $ |           |                |  | $ |               |  |  | $              |          |  |  | $ | 6,299,905  | 
|Payables                             |  |                         | 28,816,995 |  |                |   |           |                |  |   |               |  |  |                | 104,952   |  |  |   | 28,921,947 | 
|Capacity deposits                    |  |                         |           |  |                |   | 70,200     |                |  |   |               |  |  |                |          |  |  |   | 70,200     | 
|Bonds payable                        |  |                         | 622,936    |  |                |   | 8,197,725  |                |  |   | 10,339,221     |  |  |                | 7,818,618 |  |  |   | 26,978,500 | 
|Long-term loans                      |  |                         | 3,947,580  |  |                |   | 7,528,391  |                |  |   | 1,144,247      |  |  |                |          |  |  |   | 12,620,218 | 
|                                     |  |                         |            |  |                |   |            |                |  |   |                |  |  |                |           |  |  |   |            | 
|Total                                |  | $                       | 39,687,416 |  |                | $ | 15,796,316 |                |  | $ | 11,483,468     |  |  | $              | 7,923,570 |  |  | $ | 74,890,770 | 
|                                     |  |                         |            |  |                |   |            |                |  |   |                |  |  |                |           |  |  |   |            | 



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##### Table of Contents

|                                        |  |                         |            |   |                |   |            |                |  |   |                |  |  |                |            |  |  |   |             |  
|--------------------------------------- |  | ----------------------- | ---------- | - | -------------- | - | ---------- | -------------- |  | - | -------------- |  |  | -------------- | ---------- |  |  | - | ----------- | -
|                                        |  | As of December 31, 2014 |           
|                                        |  | Less than1 year         |            |   | 2 to 3years    |   |            | 4 to 5years    |  |   | > 5 years      |  |  | Total          |           
|                                        |  | NT$                     |            |   | NT$            |   |            | NT$            |  |   | NT$            |  |  | NT$            |           
|                                        |  | (In Thousands)          |            |   | (In Thousands) |   |            | (In Thousands) |  |   | (In Thousands) |  |  | (In Thousands) |           
|Derivative financial liabilities        |  |                         |            |   |                |   |            |                |  |   |                |  |  |                |            |  |  |   |             |  
|Forward exchange contracts              |  |                         |            |   |                |   |            |                |  |   |                |  |  |                |            |  |  |   |             |  
|Gross settlement                        |  |                         |            |   |                |   |            |                |  |   |                |  |  |                |            |  |  |   |             |  
|Inflow                                  |  | $                       | 3,249,080  |   |                | $ |           |                |  | $ |               |  |  | $              |           |  |  | $ | 3,249,080   |  
|Outflow                                 |  |                         | (3,291,434 | ) |                |   |           |                |  |   |               |  |  |                |           |  |  |   | (3,291,434  | )
|                                        |  |                         |            |   |                |   |            |                |  |   |                |  |  |                |            |  |  |   |             |  
|Net                                     |  | $                       | (42,354    | ) |                | $ |           |                |  | $ |               |  |  | $              |           |  |  | $ | (42,354     | )
|                                        |  |                         |            |   |                |   |            |                |  |   |                |  |  |                |            |  |  |   |             |  
|                                        | 
|                                        |  | As of December 31, 2015 |           
|                                        |  | Less than1 year         |            |   | 2 to 3years    |   |            | 4 to 5years    |  |   | > 5 years      |  |  | Total          |           
|                                        |  | NT$                     |            |   | NT$            |   |            | NT$            |  |   | NT$            |  |  | NT$            |           
|                                        |  | (In Thousands)          |            |   | (In Thousands) |   |            | (In Thousands) |  |   | (In Thousands) |  |  | (In Thousands) |           
|Non-derivative financial liabilities    |  |                         |            |   |                |   |            |                |  |   |                |  |  |                |            |  |  |   |             |  
|Short-term loans                        |  | $                       | 5,539,169  |   |                | $ |           |                |  | $ |               |  |  | $              |           |  |  | $ | 5,539,169   |  
|Payables                                |  |                         | 32,882,728 |   |                |   |           |                |  |   |               |  |  |                | 107,975    |  |  |   | 32,990,703  |  
|Capacity deposits                       |  |                         | 167,586    |   |                |   | 191,301    |                |  |   |               |  |  |                |           |  |  |   | 358,887     |  
|Bonds payable                           |  |                         | 622,936    |   |                |   | 15,510,038 |                |  |   | 23,444,199     |  |  |                | 5,218,410  |  |  |   | 44,795,583  |  
|Long-term loans                         |  |                         | 6,782,180  |   |                |   | 4,206,040  |                |  |   | 1,829,407      |  |  |                | 62,208     |  |  |   | 12,879,835  |  
|Other financial liabilities -noncurrent |  |                         |           |   |                |   |           |                |  |   |               |  |  |                | 6,778,450  |  |  |   | 6,778,450   |  
|                                        |  |                         |            |   |                |   |            |                |  |   |                |  |  |                |            |  |  |   |             |  
|Total                                   |  | $                       | 45,994,599 |   |                | $ | 19,907,379 |                |  | $ | 25,273,606     |  |  | $              | 12,167,043 |  |  | $ | 103,342,627 |  
|                                        |  |                         |            |   |                |   |            |                |  |   |                |  |  |                |            |  |  |   |             |  
|Derivative financial liabilities        |  |                         |            |   |                |   |            |                |  |   |                |  |  |                |            |  |  |   |             |  
|Forward exchange contracts              |  |                         |            |   |                |   |            |                |  |   |                |  |  |                |            |  |  |   |             |  
|Net settlement                          |  | $                       | ( 999      | ) |                | $ |           |                |  | $ |               |  |  | $              |           |  |  | $ | ( 999       | )
|                                        |  |                         |            |   |                |   |            |                |  |   |                |  |  |                |            |  |  |   |             |  



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| | (6) | Foreign currency risk management
| | --- | --------------------------------

UMC entered into forward exchange contracts for hedging the
exchange rate risk arising from the net assets or liabilities denominated in foreign currency. The details of forward exchange contracts entered into by UMC are summarized as follows:

As of December 31, 2014



|                           |  |                      |  |                                  
|-------------------------- |  | -------------------- |  | ---------------------------------
|Type                       |  | Notional Amount      |  | Contract Period                  
|Forward exchange contracts |  | Sell USD 104 million |  | December 5, 2014~January 29, 2015

As of December 31, 2015



|                           |  |                     |  |                                  
|-------------------------- |  | ------------------- |  | ---------------------------------
|Type                       |  | Notional Amount     |  | Contract Period                  
|Forward exchange contracts |  | Sell USD 44 million |  | December 3, 2015~January 28, 2016



| | (7) | Fair value measurement
| | --- | ----------------------

Fair value is the price that would be received to sell an asset or paid
to transfer a liability in an orderly transaction between market participants at the measurement date. The fair value measurement is based on the presumption that the transaction to sell the asset or transfer the liability takes place either in the
principal market for the asset or liability, or in the absence of a principal market, in the most advantageous market for the asset or liability.

The principal or the most advantageous market must be accessible by the Company.

The fair value of an asset or a liability is measured using the assumptions that market participants would use when pricing the asset or
liability, assuming that market participants act in their economic best interest.

A fair value measurement of a non-financial asset takes
into account a market participants ability to generate economic benefits by using the asset in its highest and best use or by selling it to another market participant that would use the asset in its highest and best use.

The Company uses valuation techniques that are appropriate in the circumstances and for which sufficient data are available to measure fair
value, maximizing the use of relevant observable inputs and minimizing the use of unobservable inputs.



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All assets and liabilities for which fair value is measured or disclosed in the financial
statements are categorized within the fair value hierarchy, described as follows, based on the lowest level input that is significant to the fair value measurement as a whole:



| |  |  | Level 1  Quoted (unadjusted) market prices in active markets for identical assets or liabilities;
| | - |  | --------------------------------------------------------------------------------------------------



| |  |  | Level 2  Valuation techniques for which the lowest level input that is significant to the fair value measurement is directly or indirectly observable;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Level 3  Valuation techniques for which the lowest level input that is significant to the fair value measurement is unobservable.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------

For assets and liabilities that are recognized in the financial statements on a recurring basis, the Company determines whether transfers have
occurred between levels in the hierarchy by re-assessing categorization (based on the lowest level input that is significant to the fair value measurement as a whole) at the end of each reporting period.



| | a. | Assets and liabilities measured and recorded at fair value on a recurring basis.
| | -- | --------------------------------------------------------------------------------

The assets
and liabilities measured and recorded at fair value on a recurring basis are summarized as below:



|                                                                    |  |                         |            |  |                |   |         |                |  |   |                |  |  |   |            | 
|------------------------------------------------------------------- |  | ----------------------- | ---------- |  | -------------- | - | ------- | -------------- |  | - | -------------- |  |  | - | ---------- | 
|                                                                    |  | As of December 31, 2014 |           
|                                                                    |  | Level 1                 |            |  | Level 2        |   |         | Level 3        |  |   | Total          | 
|                                                                    |  | NT$                     |            |  | NT$            |   |         | NT$            |  |   | NT$            | 
|                                                                    |  | (In Thousands)          |            |  | (In Thousands) |   |         | (In Thousands) |  |   | (In Thousands) | 
|Financial assets:                                                   |  |                         |            |  |                |   |         |                |  |   |                |  |  |   |            | 
|Financial assets at fair value through profit or loss, current      |  | $                       | 634,811    |  |                | $ | 105,318 |                |  | $ |               |  |  | $ | 740,129    | 
|Financial assets at fair value through profit or loss, noncurrent   |  |                         |           |  |                |   | 45,232  |                |  |   |               |  |  |   | 45,232     | 
|Available-for-sale financial assets, noncurrent                     |  |                         | 18,174,030 |  |                |   | 170,922 |                |  |   | 6,017,152      |  |  |   | 24,362,104 | 
|Financial liabilities:                                              |  |                         |            |  |                |   |         |                |  |   |                |  |  |   |            | 
|Financial liabilities at fair value through profit or loss, current |  |                         |           |  |                |   | 42,354  |                |  |   |               |  |  |   | 42,354     | 



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|                                                                    |  |                         |            |  |                |   |         |                |  |   |                |  |  |   |            | 
|------------------------------------------------------------------- |  | ----------------------- | ---------- |  | -------------- | - | ------- | -------------- |  | - | -------------- |  |  | - | ---------- | 
|                                                                    |  | As of December 31, 2015 |           
|                                                                    |  | Level 1                 |            |  | Level 2        |   |         | Level 3        |  |   | Total          | 
|                                                                    |  | NT$                     |            |  | NT$            |   |         | NT$            |  |   | NT$            | 
|                                                                    |  | (In Thousands)          |            |  | (In Thousands) |   |         | (In Thousands) |  |   | (In Thousands) | 
|Financial assets:                                                   |  |                         |            |  |                |   |         |                |  |   |                |  |  |   |            | 
|Financial assets at fair value through profit or loss, current      |  | $                       | 450,135    |  |                | $ | 214,783 |                |  | $ |               |  |  | $ | 664,918    | 
|Financial assets at fair value through profit or loss, noncurrent   |  |                         |           |  |                |   | 81,933  |                |  |   |               |  |  |   | 81,933     | 
|Available-for-sale financial assets, noncurrent                     |  |                         | 14,571,610 |  |                |   | 142,231 |                |  |   | 9,086,845      |  |  |   | 23,800,686 | 
|Financial liabilities:                                              |  |                         |            |  |                |   |         |                |  |   |                |  |  |   |            | 
|Financial liabilities at fair value through profit or loss, current |  |                         |           |  |                |   | 999     |                |  |   |               |  |  |   | 999        | 

Fair values of financial assets at fair value through profit or loss and available-for-sale financial assets
that are categorized into level 1 are based on the quoted market prices in active market. If there is no active market, the Company estimates the fair value by using the market method valuation techniques based on parameters such as recent fund
raising activities, valuation of similar companies, individual companys development, market conditions and other economic indicators. If there are restrictions on the sale or transfer of an available-for-sale financial asset, which are a
characteristic of the asset, the fair value of the asset will be determined based on similar but unrestricted financial assets quoted market price with appropriate discounts for the restrictions.

During the years ended December 31, 2014 and 2015, there were no significant transfers between Level 1 and Level 2 fair value
measurements.

Reconciliations for fair value measurement in Level 3 fair value hierarchy were as follows:



|                                                |  |                                     |           |   |                |   |   |                 |  |   |                |   |  |   |           |  
|----------------------------------------------- |  | ----------------------------------- | --------- | - | -------------- | - | - | --------------- |  | - | -------------- | - |  | - | --------- | -
|                                                |  | Available-for-sale financial assets |          
|                                                |  | Common stock                        |           |   | Funds          |   |   | Preferred stock |  |   | Total          |  
|                                                |  | NT$                                 |           |   | NT$            |   |   | NT$             |  |   | NT$            |  
|                                                |  | (In Thousands)                      |           |   | (In Thousands) |   |   | (In Thousands)  |  |   | (In Thousands) |  
|As of January 1, 2014                           |  | $                                   | 3,517,733 |   |                | $ |  |                 |  | $ | 312,600        |   |  | $ | 3,830,333 |  
|Recognized in profit (loss)                     |  |                                     | (119,274  | ) |                |   |  |                 |  |   |               |   |  |   | (119,274  | )
|Recognized in other comprehensive income (loss) |  |                                     | 627,892   |   |                |   |  |                 |  |   | (12,600        | ) |  |   | 615,292   |  
|Acquisition                                     |  |                                     | 1,318,039 |   |                |   |  |                 |  |   | 469,691        |   |  |   | 1,787,730 |  
|Disposal                                        |  |                                     | (14,279   | ) |                |   |  |                 |  |   |               |   |  |   | (14,279   | )
|Transfer to Level 3                             |  |                                     | 33,641    |   |                |   |  |                 |  |   |               |   |  |   | 33,641    |  
|Transfer out of Level 3                         |  |                                     | (136,249  | ) |                |   |  |                 |  |   |               |   |  |   | (136,249  | )
|Exchange effect                                 |  |                                     | 8,501     |   |                |   |  |                 |  |   | 11,457         |   |  |   | 19,958    |  
|                                                |  |                                     |           |   |                |   |   |                 |  |   |                |   |  |   |           |  
|As of December 31, 2014                         |  | $                                   | 5,236,004 |   |                | $ |  |                 |  | $ | 781,148        |   |  | $ | 6,017,152 |  
|                                                |  |                                     |           |   |                |   |   |                 |  |   |                |   |  |   |           |  



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|                                                |  |                                     |           |   |                |   |         |                 |  |   |                |   |  |   |           |  
|----------------------------------------------- |  | ----------------------------------- | --------- | - | -------------- | - | ------- | --------------- |  | - | -------------- | - |  | - | --------- | -
|                                                |  | Available-for-sale financial assets |          
|                                                |  | Common stock                        |           |   | Funds          |   |         | Preferred stock |  |   | Total          |  
|                                                |  | NT$                                 |           |   | NT$            |   |         | NT$             |  |   | NT$            |  
|                                                |  | (In Thousands)                      |           |   | (In Thousands) |   |         | (In Thousands)  |  |   | (In Thousands) |  
|As of January 1, 2015                           |  | $                                   | 5,236,004 |   |                | $ |        |                 |  | $ | 781,148        |   |  | $ | 6,017,152 |  
|Recognized in profit (loss)                     |  |                                     | (135,241  | ) |                |   |        |                 |  |   |               |   |  |   | (135,241  | )
|Recognized in other comprehensive income (loss) |  |                                     | (147,552  | ) |                |   | (1,681  | )               |  |   | 24,777         |   |  |   | (124,456  | )
|Acquisition                                     |  |                                     | 3,083,316 |   |                |   | 464,105 |                 |  |   | 636,300        |   |  |   | 4,183,721 |  
|Disposal                                        |  |                                     | (48,762   | ) |                |   |        |                 |  |   | (300,000       | ) |  |   | (348,762  | )
|Transfer to Level 3                             |  |                                     | 14,854    |   |                |   | 307,230 |                 |  |   |               |   |  |   | 322,084   |  
|Transfer out of Level 3                         |  |                                     | (878,338  | ) |                |   |        |                 |  |   |               |   |  |   | (878,338  | )
|Exchange effect                                 |  |                                     | 13,899    |   |                |   | 12,755  |                 |  |   | 24,031         |   |  |   | 50,685    |  
|                                                |  |                                     |           |   |                |   |         |                 |  |   |                |   |  |   |           |  
|As of December 31, 2015                         |  | $                                   | 7,138,180 |   |                | $ | 782,409 |                 |  | $ | 1,166,256      |   |  | $ | 9,086,845 |  
|                                                |  |                                     |           |   |                |   |         |                 |  |   |                |   |  |   |           |  

The Companys policy to recognize the transfer into and out of fair value hierarchy levels is based on
the event or changes in circumstances that caused the transfer.

The total losses of NT$644 million, NT$119 million and NT$134 million for
the years ended December 31, 2013, 2014 and 2015, were included in profit or loss that is attributable to the change in unrealized gains or losses relating to those available-for-sale assets without quoted market prices held at the end of the
reporting period.



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|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |  |                |            |  |                                                      |   |            |                |  |   |                |  |  |                 |   |  |  |                      
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |  | -------------- | ---------- |  | ---------------------------------------------------- | - | ---------- | -------------- |  | - | -------------- |  |  | --------------- | - |  |  | ---------------------
|b.      Assets and liabilities not recorded at fair value
on a recurring basis but for which fair value is disclosed:  The
fair value of bonds payables is estimated by the market price or estimated using valuation model. The model uses market-based observable inputs including share price, volatility, credit spread and risk free interest rate. The fair value of
long-term loans is determined using discounted cash flow model, based on the Companys current incremental borrowing rates of similar loans. 
The fair values of the Companys short-term financial instruments including cash and cash equivalents, receivables, refundable
deposits, other financial assets-current, short-term loans, payables and capacity deposits approximate their carrying amount due to their maturities within one year. 
As of December 31, 2014
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |  |                |            |  | Fair value measurements duringreporting period using |   |            |               
|Items                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |  | Fair value     |            |  | Level 1                                              |   |            | Level 2        |  |   | Level 3        |  |  | Carrying amount
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |  | NT$            |            |  | NT$                                                  |   |            | NT$            |  |   | NT$            |  |  | NT$            
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |  | (In Thousands) |            |  | (In Thousands)                                       |   |            | (In Thousands) |  |   | (In Thousands) |  |  | (In Thousands) 
|Bonds payables                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |  | $              | 25,043,265 |  |                                                      | $ | 25,043,265 |                |  | $ |               |  |  | $               |  |  |  | $          24,977,820
|Long-term loans (current portion included)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |  |                | 12,198,456 |  |                                                      |   |           |                |  |   | 12,198,456     |  |  |                 |  |  |  | 12,198,456           
|As of December 31, 2015                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |  |                |            |  | Fair value measurements duringreporting period using |   |            |               
|Items                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |  | Fair value     |            |  | Level 1                                              |   |            | Level 2        |  |   | Level 3        |  |  | Carrying amount
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |  | NT$            |            |  | NT$                                                  |   |            | NT$            |  |   | NT$            |  |  | NT$            
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |  | (In Thousands) |            |  | (In Thousands)                                       |   |            | (In Thousands) |  |   | (In Thousands) |  |  | (In Thousands) 
|Bonds payables                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |  | $              | 42,325,673 |  |                                                      | $ | 25,134,763 |                |  | $ | 17,190,910     |  |  | $               |  |  |  | $          41,636,670
|Long-term loans (current portion included)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |  |                | 12,489,458 |  |                                                      |   |           |                |  |   | 12,489,458     |  |  |                 |  |  |  | 12,489,458           



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|12. | OPERATING SEGMENT INFORMATION
|--- | -----------------------------



| | (1) | The Company determined its operating segments based on business activities with discrete financial information regularly reported through the Companys internal reporting protocols to the Companys chief
operating decision maker. The Company is organized into business units based on its products and services. As of December 31, 2015, the Company had the following segments: wafer fabrication and new business. There were no material differences
between the accounting policies described in Note 4 and those applied by the operating segments. The primary operating activity of the wafer fabrication segment is the manufacture of chips to the design specifications of our customers by using
our own proprietary processes and techniques. The Company maintains a diversified customer base across industries, including communication, consumer electronics, computer, memory and others, while continuing to focus on manufacturing for high
growth, large volume applications, including networking, telecommunications, internet, multimedia, PCs and graphics. New business segment primarily includes researching, developing, manufacturing, and providing solar energy and new generation
light-emitting diode (LED).
| | --- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Reportable segment information for the years ended December 31, 2013, 2014 and 2015 were as
follows:



|                                                         |  |                                      |             |   |                |   |            |                |  |   |                                |   |  |                |           |   |  |   |             | 
|-------------------------------------------------------- |  | ------------------------------------ | ----------- | - | -------------- | - | ---------- | -------------- |  | - | ------------------------------ | - |  | -------------- | --------- | - |  | - | ----------- | 
|                                                         |  | For the year ended December 31, 2013 |            
|                                                         |  | WaferFabrication                     |             |   | New Business   |   |            | Subtotal       |  |   | AdjustmentandElimination(Note) |   |  | Consolidated   |          
|                                                         |  | NT$                                  |             |   | NT$            |   |            | NT$            |  |   | NT$                            |   |  | NT$            |          
|                                                         |  | (In Thousands)                       |             |   | (In Thousands) |   |            | (In Thousands) |  |   | (In Thousands)                 |   |  | (In Thousands) |          
|Net revenue from external customers                      |  | $                                    | 116,781,465 |   |                | $ | 7,030,171  |                |  | $ | 123,811,636                    |   |  | $              |          |   |  | $ | 123,811,636 | 
|Net revenue from sales among intersegments               |  |                                      | 94,116      |   |                |   | 13,190     |                |  |   | 107,306                        |   |  |                | (107,306  | ) |  |   |            | 
|Segment net income (loss), net of tax                    |  |                                      | 12,760,671  |   |                |   | (2,582,729 | )              |  |   | 10,177,942                     |   |  |                | 1,905,696 |   |  |   | 12,083,638  | 
|Capital expenditure                                      |  |                                      | 31,970,899  |   |                |   | 940,453    |                |  |   | 32,911,352                     |   |  |                |          |   |  |   | 32,911,352  | 
|Depreciation                                             |  |                                      | 35,008,525  |   |                |   | 2,233,263  |                |  |   | 37,241,788                     |   |  |                |          |   |  |   | 37,241,788  | 
|Share of profit or loss of associates and joint ventures |  |                                      | (1,193,413  | ) |                |   | 14,996     |                |  |   | (1,178,417                     | ) |  |                | 1,876,348 |   |  |   | 697,931     | 
|Income tax expense                                       |  |                                      | 2,224,378   |   |                |   | 32,456     |                |  |   | 2,256,834                      |   |  |                |          |   |  |   | 2,256,834   | 
|Impairment loss                                          |  |                                      | 1,047,500   |   |                |   | 284,968    |                |  |   | 1,332,468                      |   |  |                |          |   |  |   | 1,332,468   | 



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|                                                         |  |                                      |             |   |                |   |            |                |  |   |                                |   |  |                |           |   |  |   |             | 
|-------------------------------------------------------- |  | ------------------------------------ | ----------- | - | -------------- | - | ---------- | -------------- |  | - | ------------------------------ | - |  | -------------- | --------- | - |  | - | ----------- | 
|                                                         |  | For the year ended December 31, 2014 |            
|                                                         |  | WaferFabrication                     |             |   | New Business   |   |            | Subtotal       |  |   | AdjustmentandElimination(Note) |   |  | Consolidated   |          
|                                                         |  | NT$                                  |             |   | NT$            |   |            | NT$            |  |   | NT$                            |   |  | NT$            |          
|                                                         |  | (In Thousands)                       |             |   | (In Thousands) |   |            | (In Thousands) |  |   | (In Thousands)                 |   |  | (In Thousands) |          
|Net revenue from external customers                      |  | $                                    | 129,448,927 |   |                | $ | 10,563,149 |                |  | $ | 140,012,076                    |   |  | $              |          |   |  | $ | 140,012,076 | 
|Net revenue from sales among intersegments               |  |                                      | 77,432      |   |                |   | 3,779      |                |  |   | 81,211                         |   |  |                | (81,211   | ) |  |   |            | 
|Segment net income (loss), net of tax                    |  |                                      | 12,350,114  |   |                |   | (2,546,156 | )              |  |   | 9,803,958                      |   |  |                | 643,230   |   |  |   | 10,447,188  | 
|Capital expenditure                                      |  |                                      | 42,789,821  |   |                |   | 447,186    |                |  |   | 43,237,007                     |   |  |                |          |   |  |   | 43,237,007  | 
|Depreciation                                             |  |                                      | 36,514,624  |   |                |   | 2,270,952  |                |  |   | 38,785,576                     |   |  |                |          |   |  |   | 38,785,576  | 
|Share of profit or loss of associates and joint ventures |  |                                      | (1,545,260  | ) |                |   | (84,850    | )              |  |   | (1,630,110                     | ) |  |                | 1,667,289 |   |  |   | 37,179      | 
|Income tax expense                                       |  |                                      | 2,030,800   |   |                |   | 2,907      |                |  |   | 2,033,707                      |   |  |                | 1,091,408 |   |  |   | 3,125,115   | 
|Impairment loss                                          |  |                                      | 303,220     |   |                |   | 597,975    |                |  |   | 901,195                        |   |  |                |          |   |  |   | 901,195     | 
|                                                         | 
|                                                         |  | For the year ended December 31, 2015 |            
|                                                         |  | WaferFabrication                     |             |   | New Business   |   |            | Subtotal       |  |   | AdjustmentandElimination(Note) |   |  | Consolidated   |          
|                                                         |  | NT$                                  |             |   | NT$            |   |            | NT$            |  |   | NT$                            |   |  | NT$            |          
|                                                         |  | (In Thousands)                       |             |   | (In Thousands) |   |            | (In Thousands) |  |   | (In Thousands)                 |   |  | (In Thousands) |          
|Net revenue from external customers                      |  | $                                    | 141,145,132 |   |                | $ | 3,685,289  |                |  | $ | 144,830,421                    |   |  | $              |          |   |  | $ | 144,830,421 | 
|Net revenue from sales among intersegments               |  |                                      | 46,697      |   |                |   | 943,988    |                |  |   | 990,685                        |   |  |                | (990,685  | ) |  |   |            | 
|Segment net income (loss), net of tax                    |  |                                      | 13,619,526  |   |                |   | (1,962,407 | )              |  |   | 11,657,119                     |   |  |                | 983,979   |   |  |   | 12,641,098  | 
|Capital expenditure                                      |  |                                      | 60,359,142  |   |                |   | 583,954    |                |  |   | 60,943,096                     |   |  |                | (438,947  | ) |  |   | 60,504,149  | 
|Depreciation                                             |  |                                      | 42,687,078  |   |                |   | 814,867    |                |  |   | 43,501,945                     |   |  |                | (28,937   | ) |  |   | 43,473,008  | 
|Share of profit or loss of associates and joint ventures |  |                                      | (1,050,563  | ) |                |   | (58,513    | )              |  |   | (1,109,076                     | ) |  |                | 1,113,770 |   |  |   | 4,694       | 
|Income tax expense (benefit)                             |  |                                      | 879,818     |   |                |   | (3,324     | )              |  |   | 876,494                        |   |  |                | 151,006   |   |  |   | 1,027,500   | 
|Impairment loss                                          |  |                                      | 1,465,036   |   |                |   | 801,465    |                |  |   | 2,266,501                      |   |  |                |          |   |  |   | 2,266,501   | 



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|                    |  |                         |             |  |                |   |            |                |  |   |                                |  |  |                |            |   |  |   |             | 
|------------------- |  | ----------------------- | ----------- |  | -------------- | - | ---------- | -------------- |  | - | ------------------------------ |  |  | -------------- | ---------- | - |  | - | ----------- | 
|                    |  | As of December 31, 2014 |            
|                    |  | WaferFabrication        |             |  | New Business   |   |            | Subtotal       |  |   | AdjustmentandElimination(Note) |  |  | Consolidated   |           
|                    |  | NT$                     |             |  | NT$            |   |            | NT$            |  |   | NT$                            |  |  | NT$            |           
|                    |  | (In Thousands)          |             |  | (In Thousands) |   |            | (In Thousands) |  |   | (In Thousands)                 |  |  | (In Thousands) |           
|Segment assets      |  | $                       | 304,022,185 |  |                | $ | 13,622,342 |                |  | $ | 317,644,527                    |  |  | $              | (6,996,994 | ) |  | $ | 310,647,533 | 
|                    |  |                         |             |  |                |   |            |                |  |   |                                |  |  |                |            |   |  |   |             | 
|Segment liabilities |  | $                       | 80,166,502  |  |                | $ | 8,096,635  |                |  | $ | 88,263,137                     |  |  | $              | 2,045,363  |   |  | $ | 90,308,500  | 
|                    |  |                         |             |  |                |   |            |                |  |   |                                |  |  |                |            |   |  |   |             | 



|                    |  |                         |             |  |                |   |           |                |  |   |                                |  |  |                |            |   |  |   |             | 
|------------------- |  | ----------------------- | ----------- |  | -------------- | - | --------- | -------------- |  | - | ------------------------------ |  |  | -------------- | ---------- | - |  | - | ----------- | 
|                    |  | As of December 31, 2015 |            
|                    |  | WaferFabrication        |             |  | New Business   |   |           | Subtotal       |  |   | AdjustmentandElimination(Note) |  |  | Consolidated   |           
|                    |  | NT$                     |             |  | NT$            |   |           | NT$            |  |   | NT$                            |  |  | NT$            |           
|                    |  | (In Thousands)          |             |  | (In Thousands) |   |           | (In Thousands) |  |   | (In Thousands)                 |  |  | (In Thousands) |           
|Segment assets      |  | $                       | 334,324,124 |  |                | $ | 7,138,779 |                |  | $ | 341,462,903                    |  |  | $              | (6,108,610 | ) |  | $ | 335,354,293 | 
|                    |  |                         |             |  |                |   |           |                |  |   |                                |  |  |                |            |   |  |   |             | 
|Segment liabilities |  | $                       | 106,055,240 |  |                | $ | 2,627,059 |                |  | $ | 108,682,299                    |  |  | $              | 1,819,347  |   |  | $ | 110,501,646 | 
|                    |  |                         |             |  |                |   |           |                |  |   |                                |  |  |                |            |   |  |   |             | 

Note: The adjustments primarily consisted of intragroup elimination entries and GAAP difference adjustments.



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##### Table of Contents

| | (2) | Geographic information
| | --- | ----------------------



| | a. | Revenue from external customers
| | -- | -------------------------------



|                           |  |                                  |             |  |                |   |             |                |  |   |             | 
|-------------------------- |  | -------------------------------- | ----------- |  | -------------- | - | ----------- | -------------- |  | - | ----------- | 
|                           |  | For the years ended December 31, |            
|                           |  | 2013                             |             |  | 2014           |   |             | 2015           | 
|                           |  | NT$                              |             |  | NT$            |   |             | NT$            | 
|                           |  | (In Thousands)                   |             |  | (In Thousands) |   |             | (In Thousands) | 
|Taiwan                     |  | $                                | 40,749,257  |  |                | $ | 47,843,603  |                |  | $ | 46,015,882  | 
|Singapore                  |  |                                  | 29,467,778  |  |                |   | 17,500,236  |                |  |   | 18,316,785  | 
|China (includes Hong Kong) |  |                                  | 11,798,261  |  |                |   | 14,982,545  |                |  |   | 11,722,585  | 
|Japan                      |  |                                  | 4,584,979   |  |                |   | 7,599,531   |                |  |   | 10,141,883  | 
|USA                        |  |                                  | 15,311,681  |  |                |   | 12,402,440  |                |  |   | 12,794,864  | 
|Europe                     |  |                                  | 12,105,374  |  |                |   | 27,443,850  |                |  |   | 33,882,327  | 
|Others                     |  |                                  | 9,794,306   |  |                |   | 12,239,871  |                |  |   | 11,956,095  | 
|                           |  |                                  |             |  |                |   |             |                |  |   |             | 
|Total                      |  | $                                | 123,811,636 |  |                | $ | 140,012,076 |                |  | $ | 144,830,421 | 
|                           |  |                                  |             |  |                |   |             |                |  |   |             | 

The geographic breakdown of the Companys operating revenues was based on the location of the
Companys customers.



| | b. | Non-current assets
| | -- | ------------------



|                           |  |                    |             |  |                |   |             | 
|-------------------------- |  | ------------------ | ----------- |  | -------------- | - | ----------- | 
|                           |  | As of December 31, |            
|                           |  | 2014               |             |  | 2015           |  
|                           |  | NT$                |             |  | NT$            |  
|                           |  | (In Thousands)     |             |  | (In Thousands) |  
|Taiwan                     |  | $                  | 134,923,298 |  |                | $ | 152,936,469 | 
|Singapore                  |  |                    | 29,891,563  |  |                |   | 24,372,975  | 
|China (includes Hong Kong) |  |                    | 10,476,771  |  |                |   | 19,956,012  | 
|USA                        |  |                    | 21,906      |  |                |   | 21,530      | 
|Europe                     |  |                    | 200,030     |  |                |   | 178,625     | 
|Others                     |  |                    | 223         |  |                |   | 168         | 
|                           |  |                    |             |  |                |   |             | 
|Total                      |  | $                  | 175,513,791 |  |                | $ | 197,465,779 | 
|                           |  |                    |             |  |                |   |             | 

Non-current assets include property, plant and equipment, intangible assets, prepayment for equipment and other
noncurrent assets.



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##### Table of Contents

| | (3) | Major customers
| | --- | ---------------

Individual customers accounting for at least 10% of net sales for the years
ended December 31, 2013, 2014 and 2015 were as follows:



|                                          |  |                                  |            |  |                |   |            |                |  |   |            | 
|----------------------------------------- |  | -------------------------------- | ---------- |  | -------------- | - | ---------- | -------------- |  | - | ---------- | 
|                                          |  | For the years ended December 31, |           
|                                          |  | 2013                             |            |  | 2014           |   |            | 2015           | 
|                                          |  | NT$                              |            |  | NT$            |   |            | NT$            | 
|                                          |  | (In Thousands)                   |            |  | (In Thousands) |   |            | (In Thousands) | 
|Customer A from wafer fabrication segment |  | $                                | 17,122,660 |  |                | $ | 16,911,071 |                |  | $ | 20,761,648 | 
|                                          |  |                                  |            |  |                |   |            |                |  |   |            | 



|13. | CAPITAL MANAGEMENT
|--- | ------------------

The primary objective of the Companys capital management is to
ensure that it maintains a strong credit rating and healthy capital ratios to support its business and maximize the stockholders value. The Company also ensures its ability to operate continuously to provide returns to stockholders and
the interests of other related parties, while maintaining the optimal capital structure to reduce costs of capital.

To maintain or adjust
the capital structure, the Company may adjust the dividend payment to stockholders, return capital to stockholders, issue new shares or dispose assets to redeem liabilities.

Similar to its peers, the Company monitors its capital based on debt to capital ratio. The ratio is calculated as the Companys net debt
divided by its total capital. The net debt is derived by taking the total liabilities on the consolidated balance sheets minus cash and cash equivalents. The total capital consists of total equity (including capital, additional paid-in
capital, retained earnings, other components of equity and non-controlling interests) plus net debt.

The Companys strategy, which is
unchanged for the reporting periods, is to maintain a reasonable ratio in order to raise capital with reasonable cost. The debt to capital ratios as of December 31, 2014 and 2015 were as follows:



|                                |  |                    |             |   |                |   |             |  
|------------------------------- |  | ------------------ | ----------- | - | -------------- | - | ----------- | -
|                                |  | As of December 31, |            
|                                |  | 2014               |             |   | 2015           |  
|                                |  | NT$                |             |   | NT$            |  
|                                |  | (In Thousands)     |             |   | (In Thousands) |  
|Total liabilities               |  | $                  | 90,308,500  |   |                | $ | 110,501,646 |  
|Less: Cash and cash equivalents |  |                    | (45,701,335 | ) |                |   | (53,290,433 | )
|                                |  |                    |             |   |                |   |             |  
|Net debt                        |  |                    | 44,607,165  |   |                |   | 57,211,213  |  
|Total equity                    |  |                    | 220,339,033 |   |                |   | 224,852,647 |  
|                                |  |                    |             |   |                |   |             |  
|Total capital                   |  | $                  | 264,946,198 |   |                | $ | 282,063,860 |  
|                                |  |                    |             |   |                |   |             |  
|Debt to capital ratios          |  |                    | 16.84       | % |                |   | 20.28       | %
|                                |  |                    |             |   |                |   |             |  



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