Chitung Liu - 07 Sep 2026 Form 4 Insider Report for UNITED MICROELECTRONICS CORP (UMC)

Reporting relationship: CFO & SVP
Issuer ticker: UMC
Reported as of: 07 Sep 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 08 Sep 2026, 06:01:10 UTC
Prior SEC filing: 13 Jul 2026
Source filing: View source filing
Reporting owner signature: /s/Chitung Liu

Key filing fact

Chitung Liu filed Form 4 for UNITED MICROELECTRONICS CORP (UMC) on 08 Sep 2026.

Key facts

This page summarizes Chitung Liu's Form 4 filing for UNITED MICROELECTRONICS CORP (UMC).
2 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 08 Sep 2026, 06:01.

Change

Previous filing in this sequence was filed on 13 Jul 2026.
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

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002120081 Primary reporting owner

Liu Chitung

Relationship: CFO & SVP
Address: 8F, NO.68, SEC. 1, NEIHU RD.,, TAIPEI, TAIWAN
Signature: /s/Chitung Liu
Signature date: 08 Sep 2026

Reported non-derivative transactions

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

UMC transaction

Common Shares

Other

Transaction value
Shares: +1,000,000
Change %: +30%
Price: $0.000000^*
Shares after: 4,322,917
Date: 07 Sep 2026
Ownership: Direct
Footnotes: F1, F2

UMC transaction

Common Shares

Other

Transaction value
Shares: -1,000,000
Change %: -50%
Price: $0.000000^*
Shares after: 1,000,000
Date: 07 Sep 2026
Ownership: By CTBC Bank Trust
Footnotes: F1, F3

UMC holding

Common Shares

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 150,000
Date: 07 Sep 2026
Ownership: By Spouse

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

On September 7, 2026, the CTBC Bank Trust distributed 1,000,000 Common Shares of the Issuer to the Reporting Person due to the expiration and termination of the trust, resulting in a change in the form of the Reporting Person's ownership from indirect to direct.

Footnote F2

Includes 1,210,000 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.

Footnote F3

The shares are under Trust with Discretion Reserved.