United Microelectronics (UMC) submits administrative 6-K to SEC

Rhea-AI Filing Summary

This Form 6-K filing from United Microelectronics Corporation (UMC) dated 20 June 2025 is a routine submission under Rules 13a-16 and 15d-16 of the Securities Exchange Act of 1934 for foreign private issuers. The document contains only the statutory cover page, the signature of Chief Financial Officer Chitung Liu, and an exhibit index referencing Exhibit 99.1, which is identified simply as “6K on 06/20/2025.”

No consolidated financial statements, earnings data, operational updates, or material corporate actions are included. As such, the filing appears to be administrative in nature and does not disclose any new information that would materially affect the company’s financial outlook or strategic positioning.

Insights

Financial Analyst

TL;DR: Routine 6-K; no financials or material events disclosed—minimal investor impact.

The submitted Form 6-K is strictly procedural, providing the SEC with notice of a filing dated 20 June 2025. It lacks financial tables, guidance, or discussion of operations. The sole named exhibit (99.1) is generically titled and not provided in the text. Consequently, investors receive no incremental insight into UMC’s revenue, margin trends, capacity expansion, or customer dynamics. The filing neither signals risk nor opportunity, and trading sentiment should remain unchanged absent additional disclosures.

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

June 20, 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: June 20, 2025

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EXHIBIT INDEX

Exhibit		Description
99.1		6K on 06/20/2025

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FAQ

Why did UMC (UMC) file a Form 6-K on June 20, 2025?

The company submitted a routine Form 6-K to comply with Exchange Act Rules 13a-16/15d-16 for foreign issuers; no substantive details were included.

Does this Form 6-K contain UMC’s Q2 2025 earnings?

No. The filing contains no earnings data or financial statements.

Are there any material events or transactions disclosed in this 6-K?

No material corporate actions, transactions, or strategic updates are provided.

Who signed the Form 6-K for United Microelectronics?

Chief Financial Officer Chitung Liu signed the filing on behalf of the company.