Liu Chitung (CIK 2120081) reported 5 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-09-17). Recent activity: Sell UMC (1.2M shares), Sell UMC (400,000 shares), Buy UMC (1.0M shares), Sell UMC (1.0M shares), Sell UMC (1.9M shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-17 | UNITED MICROELECTRONICS CORP (UMC) | CFO & SVP | Sell | 1.2M | $170.8M |
| 2026-09-17 | UNITED MICROELECTRONICS CORP (UMC) | CFO & SVP | Sell | 400,000 | $58.0M |
| 2026-09-08 | UNITED MICROELECTRONICS CORP (UMC) | CFO & SVP | Buy | 1.0M | $0 |
| 2026-09-08 | UNITED MICROELECTRONICS CORP (UMC) | CFO & SVP | Sell | 1.0M | $0 |
| 2026-07-13 | UNITED MICROELECTRONICS CORP (UMC) | CFO & SVP | Sell | 1.9M | $294.3M |
来源：SEC Form 4 申报文件 · 截至 2026-09-17