=== SEC Form 4 — Statement of Changes in Beneficial Ownership ===
Document Type: 4
Period of Report: 2026-09-07
10b5-1 Pre-arranged Plan: No
--- Issuer ---
Name: UNITED MICROELECTRONICS CORP (UMC)
CIK: 0001033767
--- Reporting Owner ---
Name: Liu Chitung
CIK: 0002120081
Role: Officer (CFO & SVP)
--- Non-Derivative Transactions ---
[Transaction #1]
Security: Common Shares
Date: 2026-09-07 | Code: J (Other acquisition/disposition)
Shares: +1,000,000 | Price: $0.00
Shares Owned After: 4,322,917 | Ownership: D (Direct)
Footnotes:
[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.
[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.
[Transaction #2]
Security: Common Shares
Date: 2026-09-07 | Code: J (Other acquisition/disposition)
Shares: -1,000,000 | Price: $0.00
Shares Owned After: 1,000,000 | Ownership: I (Indirect) | Nature: By CTBC Bank Trust
Footnotes:
[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.
[F3] The shares are under Trust with Discretion Reserved.
--- Holdings ---
[Holding #1]
Security: Common Shares
Ownership: I (Indirect)
--- Footnotes (Complete Index) ---
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.
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.
F3: The shares are under Trust with Discretion Reserved.
--- Signature ---
/s/ /s/Chitung Liu (2026-09-08)
