Chitung Liu
Insider
First SEC filing: March 18, 2026 · Latest: March 18, 2026
Insider at
Insider transactions
0 buys (P)
3 sells (S)
Net: $-523,087,000
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Sept. 17, 2026 | UMC | S | 400,000 | $145.00 | $58,000,000 | 2,639,757 Direct | -13.16% | Disposed | -84.0% (price as of 2026-10-06) |
| Sept. 16, 2026 | UMC | S | 1,200,000 | $142.33 | $170,796,000 | 3,039,757 Direct | -28.30% | Disposed | -83.7% (price as of 2026-10-06) |
| Sept. 7, 2026 | UMC | J | 1,000,000 | · | · | 4,322,917 Direct | +30.09% | Acquired | (price as of 2026-10-06) |
| Sept. 7, 2026 | UMC | J | 1,000,000 | · | · | 1,000,000 Indirect | -50.00% | Disposed | (price as of 2026-10-06) |
| July 13, 2026 | UMC | S | 1,900,000 | $154.89 | $294,291,000 | 3,322,917 Direct | -36.38% | Disposed | -85.0% (price as of 2026-10-06) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Initial ownership (Form 3) 3 holdings
Securities held when first becoming an insider, per SEC Form 3.