# EDGAR Filing Document

**Accession Number:** 0001033767
**File Stem:** 0000950170-25-084096
**Filing Date:** 2025-6
**Character Count:** 5235
**Document Hash:** d929e1f48f17885a3f6dcfa167007594
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000950170-25-084096.hdr.sgml**: 20250610

**ACCESSION NUMBER**: 0000950170-25-084096

**CONFORMED SUBMISSION TYPE**: 6-K

**PUBLIC DOCUMENT COUNT**: 3

**CONFORMED PERIOD OF REPORT**: 20250610

**FILED AS OF DATE**: 20250610

**DATE AS OF CHANGE**: 20250610

**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:** 251035916

**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** 

**June 10, 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 |

---

Date: June 10, 2025

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**EXHIBIT INDEX** 

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| | |
|:---|:---|
| **Exhibit**  | **Description**  |
| <br>99.1 | <br>[<u>6K on 06/10/2025</u>](umc-ex99_1.htm) |

---

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## Exhibit 99.1

&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;

![img208044986_0.jpg](img208044986_0.jpg)**www.umc.com**

**Exhibit**

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

99.1 Announcement on 2025/06/09: the trading and pledge of UMC common shares by directors, executive officers and 10% shareholders of UMC

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**Exhibit 99.1**

**United Microelectronics Corporation**

For the month of May, 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 April 30, 2025* | *Number of shares as of May 31, 2025* | *Changes* |
| Executive 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 | Ming Hsu<br>Oliver Chang<br>TS Wu<br>C C Hsu<br>S F Tzou<br>Jerry CJ Hu<br>Steven S Liu<br>Francia Hsu<br>Mindy Lin<br>Eric Chen | 7535400<br>4544889<br>3218784<br>5404043<br>1065308<br>2906200<br>2246200<br>978200<br>2815125<br>1426200 | 7195400<br>4435889<br>2598784<br>5204043<br>925308<br>2479200<br>1546200<br>868200<br>2769125<br>976200 | (340000)<br>(109000)<br>(620000)<br>(200000)<br>(140000)<br>(427000)<br>(700000)<br>(110000)<br>(46000)<br>(450000) |

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

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