Chitung Liu - 18 Mar 2026 Form 3 Insider Report for UNITED MICROELECTRONICS CORP (UMC)

Role: CFO & SVP
Signature: /s/Chitung Liu
Issuer symbol: UMC
Transactions as of: 18 Mar 2026
Net transactions value: $0
Form type: 3
Filing time: 18 Mar 2026, 06:18:13 UTC
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Liu Chitung	CFO & SVP	8F, NO.68, SEC. 1, NEIHU RD.,, TAIPEI, TAIWAN	/s/Chitung Liu	18 Mar 2026	0002120081

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	UMC	Common Shares						5,222,917	18 Mar 2026	Direct	F1
holding	UMC	Common Shares						150,000	18 Mar 2026	By Spouse
holding	UMC	Common Shares						2,000,000	18 Mar 2026	By CTBC Bank Trust	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	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.
F2	The shares are under Trust with Discretion Reserved.