UMC Insider Trading Activity and SEC Form 4 Filings
UMC insider trading summary
Over the past 12 months, insiders at United Microelectronics Corp (UMC) reported 4 sales worth $232.1M by 3 insiders and no open-market purchases on SEC Form 4. Net insider selling was $232.1M.
Latest UMC insider buys and sells
| Date | Insider | Role | Type | Value |
|---|---|---|---|---|
| Sep 22, 2026 | Jen-Tsung Lin | Vice President | Sell | $1.6M (10,000 @ $163.00) |
| Sep 17, 2026 | Chitung Liu | CFO & SVP | Sell | $58.0M (400,000 @ $145.00) |
| Sep 16, 2026 | Chitung Liu | CFO & SVP | Sell | $170.8M (1,200,000 @ $142.33) |
| Jun 30, 2026 | Che-Jen Hu | Vice President | Sell | $1.7M (10,000 @ $171.30) |
Source: SEC Form 4 filings. Open-market purchases (code P) and sales (code S) only; option exercises, grants and gifts are excluded.