# EDGAR Filing Document

**Accession Number:** 0001033767
**File Stem:** 0000950170-25-106904
**Filing Date:** 2025-8
**Character Count:** 10652
**Document Hash:** 77426dc1d699672b0c4a7d80e4a5ff58
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000950170-25-106904.hdr.sgml**: 20250812

**ACCESSION NUMBER**: 0000950170-25-106904

**CONFORMED SUBMISSION TYPE**: 6-K

**PUBLIC DOCUMENT COUNT**: 3

**CONFORMED PERIOD OF REPORT**: 20250812

**FILED AS OF DATE**: 20250812

**DATE AS OF CHANGE**: 20250812

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** UNITED MICROELECTRONICS CORP
- **CENTRAL INDEX KEY:** 0001033767
- **STANDARD INDUSTRIAL CLASSIFICATION:** SEMICONDUCTORS & RELATED DEVICES [3674]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 000000000
- **STATE OF INCORPORATION:** F5
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 6-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-15128
- **FILM NUMBER:** 251203945

**BUSINESS ADDRESS:**
- **STREET 1:** 8F, NO.68, SEC. 1, NEIHU RD.,
- **CITY:** TAIPEI
- **STATE:** F5
- **ZIP:** 11493
- **BUSINESS PHONE:** 886-2-2658-9168

**MAIL ADDRESS:**
- **STREET 1:** 8F, NO.68, SEC. 1, NEIHU RD.,
- **CITY:** TAIPEI
- **STATE:** F5
- **ZIP:** 11493

**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**Washington, D.C. 20549** 

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**FORM 6-K** 

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**REPORT OF FOREIGN ISSUER** 

**PURSUANT TO RULE 13a-16 OR 15d-16** 

**OF THE SECURITIES EXCHANGE ACT OF 1934** 

**August 12, 2025** 

**(Commission File Number: 001-15128)** 

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**United Microelectronics Corporation**

**(Translation of registrant's name into English)** 

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**No. 3 Li-Hsin 2nd Road, Hsinchu Science Park, Hsinchu, Taiwan, R.O.C.** 

**(Address of principal executive office)** 

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Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

Form 20-F  Form 40-F 

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101 (b) (1): 

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101 (b) (7): 

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**<u>SIGNATURES</u>** 

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereto duly authorized.

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| | |
|:---|:---|
| United Microelectronics Corporation | United Microelectronics Corporation |
| By: | Chitung Liu |
| Name: | Chitung Liu |
| Title: | CFO |

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Date: August 12, 2025

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**EXHIBIT INDEX** 

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| | |
|:---|:---|
| **Exhibit**  | **Description**  |
| <br>99 | <br>[<u>6K on 08/12/2025</u>](umc-ex99.htm) |

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## Ex-99

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

![img239034952_0.jpg](img239034952_0.jpg)**www.umc.com**

**Exhibit**

<u>Exhibit</u> <u>Description</u> 

99.1 Announcement on 2025/08/06: To announce the registration of capital reduction due to cancellation of the RSA

99.2 Announcement on 2025/08/12: Represent major subsidiary United Semiconductor (Xiamen) Co., Ltd. to announce important resolutions of the 2025 Extraordinary Shareholders' Meeting

99.3 Announcement on 2025/08/12: Represent major subsidiary United Semiconductor (Xiamen) Co., Ltd. to announce the election of one board member

99.4 Announcement on 2025/08/12: Represent major subsidiary USCXM to announce Extraordinary Shareholders' Meeting Resolution to release the new director from non-competition restrictions

99.5 Announcement on 2025/08/08: the trading and pledge of UMC common shares by directors, executive officers and 10% shareholders of UMC

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**Exhibit 99.1**

**To announce the registration of capital reduction due to cancellation of the RSA**

1. Date of the competent authority's approval of capital reduction: 2025/08/05

2. Date of completion of capitalization change registration: 2025/08/05

3. Effect on the financial statements (including any discrepancy between the amount of paid-in capital and the no. of shares outstanding, and the effect on net worth per share):

(1) Before the capital reduction: The paid-in capital is NT$125,565,077,040; the shares outstanding are 12,556,507,704 shares; book value per share is NT$26.83

(2) After the capital reduction: The paid-in capital is NT$125,563,274,190; the shares outstanding are 12,556,327,419 shares; book value per share is NT$26.83

Note: Net worth per share was calculated based on the consolidated financial statements for the second quarter of 2025 reviewed by CPA.)

4. Plan for expected share replacement operations: NA

5. Estimated no. of listed common shares after capital reduction and new issue: NA

6. Estimated no. of listed common shares as a percentage of issued common shares after capital reduction and new issue (No. of common shares after capital reduction/No. of issued common shares): NA

7. Countermeasures for poor circulation of equity if the aforesaid estimated no. of listed common shares does not reach 60 million shares and the percentage does not reach 25% after capital reduction: NA

8. Any other matters that need to be specified: None

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**Exhibit 99.2**

**Represent major subsidiary United Semiconductor (Xiamen) Co., Ltd. to announce important resolutions of the 2025 Extraordinary Shareholders' Meeting**

1. Date of the special shareholders meeting: 2025/08/12

2. Important resolutions:

(1) Election of one board member

(2) Release the director from non-competition restrictions

3. Any other matters that need to be specified: None

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**Exhibit 99.3**

**Represent major subsidiary United Semiconductor (Xiamen) Co., Ltd. to announce the election of one board member**

1. Date of occurrence of the change: 2025/08/12

2. Elected or changed position (Please enter institutional director, institutional supervisor, independent director, natural-person director or natural-person supervisor): natural-person director

3. Title and name of the previous position holder: Not applicable

4. Resume of the previous position holder: Not applicable

5. Title and name of the new position holder: Director, LIN, WEI-SHENG

6. Resume of the new position holder:

Associate Vice President of United Microelectronics Corporation

7. Circumstances of change (Please enter "resignation", "dismissal", "term expired", "death" or "new appointment"): new appointment

8. Reason for the change: Election of one board member

9. Number of shares held by the new position holder when elected: Not applicable

10. Original term (from __________ to __________): 2024/04/22~2027/04/21

11. Effective date of the new appointment: 2025/08/12

12. Turnover rate of directors of the same term: 1/5

13. Turnover rate of independent directors of the same term: Not applicable

14. Turnover rate of supervisors of the same term: Not applicable

15. Change in one-third or more of directors (Please enter "Yes" or "No"): No

16. Any other matters that need to be specified (the information disclosure also meets the requirements of Article 7, subparagraph 6 of the Securities and Exchange Act Enforcement Rules, which brings forth a significant impact on shareholders rights or the price of the securities on public companies.): None

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**Exhibit 99.4**

**Represent major subsidiary USCXM to announce Extraordinary Shareholders' Meeting Resolution to release the new director from non-competition restrictions**

1. Date of the shareholders meeting resolution: 2025/08/12

2. Name and title of the director with permission to engage in competitive conduct:

Director, LIN, WEI-SHENG

3. Items of competitive conduct in which the director is permitted to engage:

Associate Vice President, United Microelectronics Corporation

Director, He Jian Technology (Suzhou) Co., Ltd.

4. Period of permission to engage in the competitive conduct: During the tenure of serving as a director of United Semiconductor (Xiamen) Co., Ltd.

5. Circumstances of the resolution (please describe the results of voting in accordance with Article 209 of the Company Act): Unanimously passed by all attending shareholders

6. If the permitted competitive conduct belongs to the operator of a mainland China area enterprise, the name and title of the directors (if it is not the operator of a Mainland-area enterprise, please enter "N/A" below):

Director, LIN, WEI-SHENG

7. Company name of the mainland China area enterprise and the director's position in the enterprise:

He Jian Technology (Suzhou) Co., Ltd., Director

8. Address of the mainland China area enterprise: No.333 Xinghua Street, Suzhou Industrial Park

9. Operations of the mainland China area enterprise: Manufacturing and sales of integrated circuits

10. Impact on the company's finance and business: None

11. If the directors have invested in the mainland China area enterprise, the monetary amount of the investment and their shareholding ratio: Not applicable

12. Any other matters that need to be specified: None

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**Exhibit 99.5**

**United Microelectronics Corporation**

For the month of July, 2025

This is to report 1) the trading of directors, executive officers and 10% shareholders of United Microelectronics Corporation ("UMC") (NYSE: UMC); 2) the pledge and clear of pledge of UMC common shares by directors, executive officers and 10% shareholders of UMC;

1)The trading of directors, executive officers and 10% shareholders

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| | | | | |
|:---|:---|:---|:---|:---|
| *Title* | *Name* | *Number of shares as of June 30, 2025* | *Number of shares as of July 31, 2025* | *Changes* |
| Vice President<br>Vice President | Francia Hsu<br>Eric Chen | 778200<br>876200 | 768200<br>1476200 | (10000)<br>600000 |

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2)The pledge and clear of pledge of UMC common shares by directors, executive officers and 10% shareholders:

<u>*Title*</u> <u>*Name*</u> <u>*Number of shares as of June 30, 2025*</u> <u>*Number of shares as of July 31, 2025*</u> <u>*Changes*</u> <br> <u>--</u> <u>--</u> <u>--</u> <u>--</u> <u>--</u>

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