Ming-Tsung Chen - 29 Apr 2026 Form 3 Insider Report for UNITED MICROELECTRONICS CORP (UMC)

Reporting relationship: Vice President
Issuer ticker: UMC
Reported as of: 29 Apr 2026
Net transaction value: $0
SEC form: 3
Accepted by SEC: 07 May 2026, 06:11:51 UTC
Source filing: View source filing
Reporting owner signature: /s/Chitung Liu, attorney-in-fact

Key filing fact

Ming-Tsung Chen filed Form 3 for UNITED MICROELECTRONICS CORP (UMC) on 07 May 2026.

Key facts

This page summarizes Ming-Tsung Chen's Form 3 filing for UNITED MICROELECTRONICS CORP (UMC).
0 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 07 May 2026, 06:11.

Change

No earlier filing in this sequence is available for direct comparison.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Official SEC source

Ownership activity is grounded in SEC Form 3 disclosures.

View source filing

Reporting Owners (1)

CIK 0002133571 Primary reporting owner

CHEN MING-TSUNG

Relationship: Vice President
Address: 8F, NO.68, SEC. 1, NEIHU RD.,, TAIPEI, TAIWAN
Signature: /s/Chitung Liu, attorney-in-fact
Signature date: 07 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

UMC holding

Common Shares

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 2,484,660
Date: 29 Apr 2026
Ownership: Direct
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

Includes 674,600 shares of Restricted Stock Award (RSA) and a specified number of shares subject to the RSA will vest annually on December 5 from 2026 to 2029.

SEC remarks

Exhibit List Exhibit 24: Power of Attorney