# EDGAR Filing Document

**Accession Number:** 0001033767
**File Stem:** 0001193125-26-012225
**Filing Date:** 2026-1
**Character Count:** 6464
**Document Hash:** f383977fa8926df035616b72a9c598fc
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-012225.hdr.sgml**: 20260114

**ACCESSION NUMBER**: 0001193125-26-012225

**CONFORMED SUBMISSION TYPE**: 6-K

**PUBLIC DOCUMENT COUNT**: 3

**CONFORMED PERIOD OF REPORT**: 20260114

**FILED AS OF DATE**: 20260114

**DATE AS OF CHANGE**: 20260114

**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:** 26531408

**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** 

**January 14, 2026** 

**(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: January 14, 2026

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**EXHIBIT INDEX** 

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| | |
|:---|:---|
| **Exhibit**  | **Description**  |
| <br>99 | <br>[<u>6K on 01/14/2026</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 2026/01/14: UMC will convene Q4 2025 Investor Conference

99.2 Announcement on 2026/01/09: the trading and pledge of UMC common shares by directors, executive officers and 10% shareholders of UMC

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**Exhibit 99.1**

**UMC will convene Q4 2025 Investor Conference**

1. Date of institutional investor conference: 2026/01/28

2. Time of institutional investor conference: 17:00

3. Location of institutional investor conference: Online teleconference

4. Outline of institutional investor conference: UMC Q4 2025 Financial and Operating Results

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

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**Exhibit 99.2**

**United Microelectronics Corporation**

For the month of December, 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 November 30, 2025* | *Number of shares as of December 31, 2025* | *Changes* |
| Chairman<br>President<br>President<br>Executive Vice President<br>Senior Vice President<br>Senior Vice President<br>Senior Vice President<br>Senior Vice President<br>Vice President<br>Vice President<br>Vice President<br>Vice President<br>Vice President<br>Vice President<br>Vice President<br>Vice President<br>Vice President<br>Vice President<br>Vice President<br>Vice President<br>Vice President<br>Vice President | Stan Hung<br>SC Chien<br>Jason Wang<br>Ming Hsu<br>TS Wu<br>G C Hung<br>Oliver Chang<br>Chitung Liu<br>JT Lin<br>Victor Chuang<br>Chuck Chen<br>S F Tzou<br>Osbert Cheng<br>Steven Hsu<br>Jerry CJ Hu<br>Y S Shen<br>Steven S Liu<br>Francia Hsu<br>Mindy Lin<br>Linwu Kuo<br>Eric Chen<br>Olivia Liao | 59486252<br>19479448<br>28899800<br>6515400<br>2488784<br>2682766<br>3465889<br>4569517<br>523100<br>487771<br>1773100<br>575308<br>2031200<br>1108200<br>2397200<br>406200<br>1296200<br>768200<br>2698125<br>46200<br>1476200<br>-- | 59726492<br>19719688<br>29140040<br>6625520<br>2558084<br>2752066<br>3558289<br>4661917<br>560060<br>524731<br>1810060<br>633388<br>1939280<br>1146280<br>2405280<br>464280<br>1354280<br>756280<br>2714205<br>104280<br>1534280<br>31680 | 240240<br>240240<br>240240<br>110120<br>69300<br>69300<br>92400<br>92400<br>36960<br>36960<br>36960<br>58080<br>(91920)<br>38080<br>8080<br>58080<br>58080<br>(11920)<br>16080<br>58080<br>58080<br>31680 |

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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 November 30, 2025*</u> <u>*Number of shares as of December 31, 2025*</u> <u>*Changes*</u> <br> <u>--</u> <u>--</u> <u>--</u> <u>--</u> <u>--</u>

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