United Microelectronics Corp
UMC- Exchange
- NYSE
- Industry
- Semiconductors & Related Devices
- SEC CIK
- 0001033767
In the last 90 days, United Microelectronics Corp insiders filed 0 open-market purchases and 4 sales; 365 institutions reported holding it in 13F filings for Q2 2026, worth $4.90B in total; Maverick Capital is the only superinvestor holding it.
Open-market trades, last 90 days
Open-market purchases (P) and sales (S) by United Microelectronics Corp insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.
- Open-market buys
- 0 filings
- Open-market sells
- 4 filings
- 3 insiders, $526.4M in total
- Insiders trading
- 3
- Net value
- −$526.4M
- Purchases minus sales
Insider roster
Directors, officers and 10% owners who have filed a Form 4 for United Microelectronics Corp, current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.
| Name | Title | Last reported holding | Last filing | Filings, past year |
|---|---|---|---|---|
| Lin Jen-Tsung | Vice President | 1,172,140 | Sep 22, 2026 | 1 |
| Liu Chitung | CFO & SVP | 2,639,757 | Sep 17, 2026 | 3 |
| Hu Che-Jen | Vice President | 3,214,080 | Jun 30, 2026 | 1 |
Insider trades
Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Sep 22, 2026 (view filing)6:11 AM ET | Sep 22 | Same day | Lin Jen-TsungVice President | SSaleCommin Shares | −10.0K | $163.00 | −$1.63M | −0.8%1.17M after | |
| Sep 17, 2026 (view filing)6:07 AM ET | Sep 16-17 | 1 day | Liu ChitungCFO & SVP | SSale | −1.60M | $143.00 | −$228.8M | −37.7%2.64M after | 2 lots |
| Jul 13, 2026 (view filing)6:04 AM ET | Jul 13 | Same day | Liu ChitungCFO & SVP | SSale | −1.90M | $154.89 | −$294.3M | −36.4%3.32M after | |
| Jun 30, 2026 (view filing) | Jun 30 | Same day | Hu Che-JenVice President | SSale | −10.0K | $171.30 | −$1.71M | −0.3%3.21M after |