UNITED MICROELECTRONICS CORP UMC
CIK 0001033767
Form 3 statements with an event date from Sep 1, 2023 to Sep 25, 2026.
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.
| Holdings date | Insider | Initial holdings | |
|---|---|---|---|
| 2026-05-01 | TAN WEN YI Vice President | 650.60K shares | ▾ |
| 2026-05-01 | LU CHIA-AO Vice President | 170.00K shares | ▾ |
| 2026-04-29 | LIAO CHING YU General Counsel & VP | 732.48K shares | ▾ |
| 2026-04-29 | CHEN JIN-SHUANG CHRO & VP | 2.34M shares | ▾ |
| 2026-04-29 | KUO LIN-WU Vice President | 913.08K shares | ▾ |
| 2026-04-29 | LIN MING-YU Vice President | 2 stock holdings | ▾ |
| 2026-04-29 | HSU SHU-FEN Vice President | 2 stock holdings | ▾ |
| 2026-04-29 | LIU SHIH-WEI Vice President | 2.18M shares | ▾ |
| 2026-04-29 | SHEN YING-SHENG Vice President | 1.31M shares | ▾ |
| 2026-04-29 | HU CHE-JEN Vice President | 3.22M shares | ▾ |
| 2026-04-29 | HSU SHIH-CHIEH Vice President | 2 stock holdings | ▾ |
| 2026-04-29 | CHENG TZYY-MING Vice President | 2.87M shares | ▾ |
| 2026-04-29 | TZOU SHIH-FANG Vice President | 1.46M shares | ▾ |
| 2026-04-29 | CHEN MING-TSUNG Vice President | 2.48M shares | ▾ |
| 2026-04-29 | CHUANG YU-CHIH Vice President | 2 stock holdings | ▾ |
| 2026-04-29 | LIN JEN-TSUNG Vice President | 1.23M shares | ▾ |
| 2026-04-29 | CHANG OLIVER SVP | 4.82M shares | ▾ |
| 2026-04-29 | HUNG KUEI-CHUN SVP | 2 stock holdings | ▾ |
| 2026-04-29 | WU CHUNG-HSIEN CISO & SVP | 2 stock holdings | ▾ |
| 2026-03-18 | Liu Chitung CFO & SVP | 3 stock holdings | ▾ |
| 2026-03-18 | Wang Su-Lin Director | 101.00K shares | ▾ |
| 2026-03-18 | Wu Ling-Ling Director | No securities reported | ▾ |
| 2026-03-18 | Hsu Wen Hsin Director | No securities reported | ▾ |
| 2026-03-18 | Shiu Kuang-Si Director | No securities reported | ▾ |
| 2026-03-18 | Shyu Jyuo-Min Director | No securities reported | ▾ |
| 2026-03-18 | Chen Lih-Juann Director | No securities reported | ▾ |
| 2026-03-18 | Hsu Ming-Chih President & COO · Director | 8.40M shares | ▾ |
| 2026-03-18 | Wang Jason Shi Chief Executive Officer · Director | 32.66M shares | ▾ |
| 2026-03-18 | Hung Chia-Tsung Chairman & CSO · Director | 2 stock holdings | ▾ |
Showing 29 / 29 statements in 2026. The complete set is available through the API.
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