United Microelectronics (UMC) insider trading
25 directors and officers declare holding shares of United Microelectronics (UMC), each in their own filing with the SEC. The largest is Chia-Tsung Hung (Chairman & CSO · Director) with 12.9M shares, 0.51% of the company, worth $296.2M at the last close. The most recent move on file: Jen-Tsung Lin sold 10,000 shares at $163.00 on Sep 22, 2026. Of the 3 with a trade on file, 0 last bought and 3 last sold. Purchases and sales are as reported on Forms 3, 4 and 5 — the SEC counts private transactions too, and many large sales follow a plan arranged in advance. Holdings are never added up: two spouses often report the same shares, and a joint filing carries a fund's.
| Insider | Role | Shares | % of company | Value | Last trade on file | Filed |
|---|---|---|---|---|---|---|
| Chia-Tsung Hung | Chairman & CSO · Director | 12.9M | 0.51% | $296.2M | — | Mar 18, 2026 |
| Jason Shi Wang | Chief Executive Officer · Director | 6.5M | 0.26% | $150.0M | — | Mar 18, 2026 |
| Ming-Chih Hsu | President & COO · Director | 1.7M | 0.07% | $38.6M | — | Mar 18, 2026 |
| Kuei-Chun Hung | SVP | 1.2M | 0.05% | $27.0M | — | Apr 29, 2026 |
| Oliver Chang | SVP | 963,858 | 0.04% | $22.1M | — | Apr 29, 2026 |
| Ming-Yu Lin | Vice President | 864,883 | 0.03% | $19.9M | — | Apr 29, 2026 |
| Chitung Liu | CFO & SVP | 757,951 | 0.03% | $17.4M | sold 1.6M shares at $142.33 on Sep 16, 2026 | Sep 17, 2026 |
| Chung-Hsien Wu | CISO & SVP | 737,178 | 0.03% | $16.9M | — | Apr 29, 2026 |
| Che-Jen Hu | Vice President | 642,816 | 0.03% | $14.8M | sold 10,000 shares at $171.30 on Jun 30, 2026 | Jun 30, 2026 |
| Tzyy-Ming Cheng | Vice President | 573,616 | 0.02% | $13.2M | — | Apr 29, 2026 |
| Ming-Tsung Chen | Vice President | 496,932 | 0.02% | $11.4M | — | Apr 29, 2026 |
| Jin-Shuang Chen | CHRO & VP | 468,616 | 0.02% | $10.8M | — | Apr 29, 2026 |
| Shih-Wei Liu | Vice President | 436,616 | 0.02% | $10.0M | — | Apr 29, 2026 |
| Shih-Chieh Hsu | Vice President | 415,594 | 0.02% | $9.5M | — | Apr 29, 2026 |
| Shu-Fen Hsu | Vice President | 313,416 | 0.01% | $7.2M | — | Apr 29, 2026 |
| Shih-Fang Tzou | Vice President | 292,438 | 0.01% | $6.7M | — | Apr 29, 2026 |
| Ying-Sheng Shen | Vice President | 262,616 | 0.01% | $6.0M | — | Apr 29, 2026 |
| Yu-Chih Chuang | Vice President | 242,655 | <0.01% | $5.6M | — | Apr 29, 2026 |
| Jen-Tsung Lin | Vice President | 234,428 | <0.01% | $5.4M | sold 10,000 shares at $163.00 on Sep 22, 2026 | Sep 22, 2026 |
| Lin-Wu Kuo | Vice President | 182,616 | <0.01% | $4.2M | — | Apr 29, 2026 |
| Ching Yu Liao | General Counsel & VP | 146,496 | <0.01% | $3.4M | — | Apr 29, 2026 |
| Wen Yi Tan | Vice President | 130,120 | <0.01% | $3.0M | — | May 1, 2026 |
| Hung-Yu Yen | CHRO & VP | 67,936 | <0.01% | $1.6M | — | Sep 11, 2026 |
| Chia-Ao Lu | Vice President | 34,000 | <0.01% | $780,640.00 | — | May 1, 2026 |
| Su-Lin Wang | Director | 20,200 | <0.01% | $463,792.00 | — | Mar 18, 2026 |
Each insider at United Microelectronics
- Chia-Tsung Hung — Chairman & CSO · Director
- Jason Shi Wang — Chief Executive Officer · Director
- Ming-Chih Hsu — President & COO · Director
- Kuei-Chun Hung — SVP
- Oliver Chang — SVP
- Ming-Yu Lin — Vice President
- Chitung Liu — CFO & SVP
- Chung-Hsien Wu — CISO & SVP
- Che-Jen Hu — Vice President
- Tzyy-Ming Cheng — Vice President
- Ming-Tsung Chen — Vice President
- Jin-Shuang Chen — CHRO & VP
What insiders bought and sold across AI stocks · All filings on sec.gov