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UMC 6-K

United Microelectronics Corp (UMC)

6-K 2025-04-01 For: 2025-04-01
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Added on April 10, 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

April 1, 2025

(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: April 1, 2025

EXHIBIT INDEX

Exhibit Description
99 6K on 04/01/2025

EX-99

img239034952_0.jpg www.umc.com

Exhibit

Exhibit Description

99 Announcement on 2025/04/01: To clarify news reported by Economic Daily News on April 1, 2025

Exhibit 99

To clarify news reported by Economic Daily News on April 1, 2025

  1. Date of occurrence of the event: 2025/04/01

  2. Company name: UNITED MICROELECTRONICS CORP.

  3. Relationship with the Company (please enter “the company itself” or “subsidiaries”): the company itself

  4. Reciprocal shareholding percentage: N/A

  5. Name of the reporting media: Economic Daily News, A03

  6. Content of the report:

It rumored that UMC and GlobalFoundries will merge, ADR price of UMC soared.

  1. Cause of occurrence:

The Company does not comment on speculative reports or market rumors.

  1. Countermeasures: None

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