United Microelectronics (NEW) Insider Trades
NYSE: UMCTechnologySemiconductorsUSD
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Last 12 months
- Purchases
- 0 · $0
- Sales
- 5 · $526.43M
- Shares bought / sold
- 0 / 3.52M
- Net activity
- Net selling $526.4 million
United Microelectronics (NEW) insider activity
Over the last 12 months, United Microelectronics (NEW) insiders reported 7 transactions on SEC Form 4: 0 open-market purchases and 5 sales. Insiders bought $0 and sold $526.4 million worth of stock, for net insider selling of $526.4 million. The largest seller was Liu Chitung, with $523.1 million in reported sales.
The most recent filing shows LIN JEN-TSUNG (Vice President) selling 10,000 shares at $163.00 on Sep 22, 2026. Insider sales are common for compensation, tax and diversification reasons, while open-market purchases are rarer; tracking both helps put UMC's ownership changes in context.
Summary generated from market data by MetaCap's automated system. Methodology
UMC insider transactions
| Date | Insider | Type | Shares | Value | Filing |
|---|---|---|---|---|---|
| Sep 22, 2026 | LIN JEN-TSUNGVice President | Sale | 10,000 | $1.63M | Form 4 |
| Sep 17, 2026 | Liu ChitungCFO & SVP | Sale | 400,000 | $58.00M | Form 4 |
| Sep 16, 2026 | Liu ChitungCFO & SVP | Sale | 1,200,000 | $170.80M | Form 4 |
| Sep 7, 2026 | Liu ChitungCFO & SVP | other | 1,000,000 | — | Form 4 |
| Sep 7, 2026 | Liu ChitungCFO & SVP | other | 1,000,000 | — | Form 4 |
| Jul 13, 2026 | Liu ChitungCFO & SVP | Sale | 1,900,000 | $294.29M | Form 4 |
| Jun 30, 2026 | HU CHE-JENVice President | Sale | 10,000 | $1.71M | Form 4 |
Transaction codes follow SEC Form 4: P = open-market purchase, S = open-market sale, A = grant or award, M = option exercise, F = shares withheld for taxes. About Form 4