UMC (NYSE: UMC) updates on Xiamen meeting, U.S. no-dividend move and board change

Rhea-AI Filing Summary

United Microelectronics Corporation filed a Form 6-K detailing several board actions involving its subsidiaries and governance. The board of major subsidiary United Semiconductor (Xiamen) Co., Ltd. approved convening a 2026 shareholders’ meeting on March 12, 2026 in Xiamen, China, to acknowledge its 2025 annual audited financial report and 2026 operating budget and to discuss amendments to its asset acquisition and disposal procedures.

Separately, the board resolved that subsidiary UMC GROUP (USA) will not distribute dividends, retaining remaining surplus as working capital based on an audit report. The filing also notes a governance change: Hsun Chieh Investment Co., Ltd., a juristic-person director, replaced its representative on UMC’s board, appointing Ming Hsu, Executive Vice President of UMC, to succeed former representative director SC Chien, effective February 24, 2026.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN ISSUER

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

OF THE SECURITIES EXCHANGE ACT OF 1934

February 24, 2026

(Commission File Number: 001-15128)

United Microelectronics Corporation

(Translation of registrant’s name into English)

No. 3 Li-Hsin 2nd Road,

Hsinchu Science Park,

Hsinchu, Taiwan, R.O.C.

(Address of principal executive office)

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): 

SIGNATURES

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.

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

Date: February 24, 2026

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EXHIBIT INDEX

Exhibit		Description
99		6K on 02/24/2026

3

www.umc.com

Exhibit

Exhibit Description

99.1 Announcement on 2026/02/24: Represent major subsidiary United Semiconductor (Xiamen) Co., Ltd. to announce the Board Resolution to Convene a 2026 Shareholders’ Meeting

99.2 Announcement on 2026/02/24: To announce the board of directors not to distribute dividends on behalf of subsidiary UMC GROUP (USA)

99.3 Announcement on 2026/02/24: Change of the representative of juristic-person director

Exhibit 99.1

Represent major subsidiary United Semiconductor (Xiamen) Co., Ltd. to announce the Board Resolution to Convene a 2026 Shareholders’ Meeting

1. Date of the board of directors’ resolution: 2026/02/24

2. Shareholders meeting date: 2026/03/12

3. Shareholders meeting location:

No.899 Wan Jia Chun Road, Xiang’an District, Xiamen, Fujian Province, China

4. Cause for convening the meeting (1) Reported matters: None

5. Cause for convening the meeting (2) Acknowledged matters:

1.The Company’s 2025 Annual Audit Financial Report

2.The Company’s 2026 Annual Operating Budget Proposal

6. Cause for convening the meeting (3) Matters for Discussion:

1.To amend the company’s “Asset Acquisition and Disposal Procedures”

7. Cause for convening the meeting (4) Election matters: None

8. Cause for convening the meeting (5) Other Proposals: None

9. Cause for convening the meeting (6) Extemporary Motions: None

10. Book closure starting date: NA

11. Book closure ending date: NA

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

Exhibit 99.2

To announce the board of directors not to distribute dividends on behalf of subsidiary UMC GROUP (USA)

1. Date of the board of directors’ resolution: 2026/02/24

2. Type and monetary amount of dividend distribution:

The board has resolved not to distribute dividend.

3. Any other matters that need to be specified:

According to the audit report issued by the accounting firm, the remaining surplus is retained as the working capital of the company.

Exhibit 99.3

Change of the representative of juristic-person director

1. Date of occurrence of the change: 2026/02/24

2. Name of legal person: Hsun Chieh Investment Co., Ltd.

3. Name of the previous position holder: SC Chien

4. Resume of the previous position holder: Director of UMC

5. Name of the new position holder: Ming Hsu

6. Resume of the new position holder: Executive Vice President of UMC

7. Reason for the change: Replacement of the representative

8. Original term (from __________ to __________): from 2024/05/30 to 2027/05/29

9. Effective date of the new appointment: 2026/02/24

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

FAQ

What does UMC’s February 24, 2026 Form 6-K disclose for UMC (UMC)?

The Form 6-K discloses board decisions involving key subsidiaries and governance. It covers a shareholders’ meeting for United Semiconductor (Xiamen), a no-dividend decision for UMC GROUP (USA), and a change in the representative of a juristic-person director on UMC’s board.

When is the 2026 shareholders’ meeting for United Semiconductor (Xiamen) under UMC?

The 2026 shareholders’ meeting for major subsidiary United Semiconductor (Xiamen) Co., Ltd. is scheduled for March 12, 2026. It will be held at No.899 Wan Jia Chun Road, Xiang’an District, Xiamen, Fujian Province, China, focusing on financial reports, budget, and procedural amendments.

What will be discussed at United Semiconductor (Xiamen)’s 2026 shareholders’ meeting?

The meeting will acknowledge the company’s 2025 annual audited financial report and its 2026 annual operating budget proposal. It will also discuss amendments to the company’s “Asset Acquisition and Disposal Procedures,” with no election matters, other proposals, or extemporary motions listed in the agenda.

Why did UMC GROUP (USA), a UMC subsidiary, decide not to distribute dividends?

UMC GROUP (USA)’s board resolved not to distribute dividends, retaining the remaining surplus as working capital. This decision is based on an audit report issued by its accounting firm, indicating the surplus will support the company’s operational funding needs rather than shareholder distributions.

What board-level governance change did UMC report in this 6-K filing?

UMC reported a change in the representative of juristic-person director Hsun Chieh Investment Co., Ltd. Former representative SC Chien, previously a UMC director, was replaced by Ming Hsu, an Executive Vice President of UMC, with the new appointment effective February 24, 2026.

Does the UMC 6-K mention any changes to dividend policy at the parent company level?

The document specifically addresses a no-dividend decision for subsidiary UMC GROUP (USA), not for United Microelectronics Corporation itself. It states that this subsidiary will retain surplus as working capital, based on its audit report, without describing broader parent-level dividend policy changes.

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