Company · Ownership research

UNITED MICROELECTRONICS CORP UMC

CIK 0001033767

Form 3 statements with an event date from Nov 1, 2023 to Nov 8, 2026.

Insider trading Initial holdings Institutional holders

Where insider ownership starts.

Form 3 is an initial ownership statement filed when someone becomes a reporting insider. These holdings do not mean they bought shares that day.

202630 of 30 statements

Holdings date	Insider	Initial holdings
Sep 11, 2026	YEN HUNG-YU CHRO & VP	339.68K shares	▾
May 1, 2026	TAN WEN YI Vice President	650.60K shares	▾
May 1, 2026	LU CHIA-AO Vice President	170.00K shares	▾
Apr 29, 2026	LIAO CHING YU General Counsel & VP	732.48K shares	▾
Apr 29, 2026	CHEN JIN-SHUANG CHRO & VP	2.34M shares	▾
Apr 29, 2026	KUO LIN-WU Vice President	913.08K shares	▾
Apr 29, 2026	LIN MING-YU Vice President	2 stock holdings	▾
Apr 29, 2026	HSU SHU-FEN Vice President	2 stock holdings	▾
Apr 29, 2026	LIU SHIH-WEI Vice President	2.18M shares	▾
Apr 29, 2026	SHEN YING-SHENG Vice President	1.31M shares	▾
Apr 29, 2026	HU CHE-JEN Vice President	3.22M shares	▾
Apr 29, 2026	HSU SHIH-CHIEH Vice President	2 stock holdings	▾
Apr 29, 2026	CHENG TZYY-MING Vice President	2.87M shares	▾
Apr 29, 2026	TZOU SHIH-FANG Vice President	1.46M shares	▾
Apr 29, 2026	CHEN MING-TSUNG Vice President	2.48M shares	▾
Apr 29, 2026	CHUANG YU-CHIH Vice President	2 stock holdings	▾
Apr 29, 2026	LIN JEN-TSUNG Vice President	1.23M shares	▾
Apr 29, 2026	CHANG OLIVER SVP	4.82M shares	▾
Apr 29, 2026	HUNG KUEI-CHUN SVP	2 stock holdings	▾
Apr 29, 2026	WU CHUNG-HSIEN CISO & SVP	2 stock holdings	▾
Mar 18, 2026	Liu Chitung CFO & SVP	3 stock holdings	▾
Mar 18, 2026	Wang Su-Lin Director	101.00K shares	▾
Mar 18, 2026	Wu Ling-Ling Director	No securities reported	▾
Mar 18, 2026	Hsu Wen Hsin Director	No securities reported	▾
Mar 18, 2026	Shiu Kuang-Si Director	No securities reported	▾
Mar 18, 2026	Shyu Jyuo-Min Director	No securities reported	▾
Mar 18, 2026	Chen Lih-Juann Director	No securities reported	▾
Mar 18, 2026	Hsu Ming-Chih President & COO · Director	8.40M shares	▾
Mar 18, 2026	Wang Jason Shi Chief Executive Officer · Director	32.66M shares	▾
Mar 18, 2026	Hung Chia-Tsung Chairman & CSO · Director	2 stock holdings	▾

Showing 30 / 30 statements in 2026. The complete set is available through the API.

UNITED MICROELECTRONICS CORP · UMC

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