Insider · CIK 0002120081
Chitung Liu
Files at UMC (UNITED MICROELECTRONICS CORP). First filing Jul 13, 2026, latest Sep 17, 2026.
In brief
Chitung Liu files SEC Form 4 as CFO at UMC (UNITED MICROELECTRONICS CORP). Since Jul 13, 2026, Chitung Liu has reported 0 open-market buys worth $0 and 2 open-market sells worth $523M, the latest filed on Sep 17, 2026.
A track record needs three past buys with six months of prices behind them; Chitung Liu has 0, so none is measured yet.
The newest scored trade: sold $229M of UMC on Sep 16, 2026, filed Sep 17, 2026, scored 65 (notable). In the last 12 months: 0 buys worth $0 and 2 sells worth $523M.
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
UMC: UNITED MICROELECTRONICS CORP
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 65Notable | UNITED MICROELECTRONICS CORP | $229M 1,600,000 shares | -38% | - | |
| 65Notable | UNITED MICROELECTRONICS CORP | $294M 1,900,000 shares | -36% | +263% from low-15% from high |
Transactions
Every row this insider has filed, 5 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 16, 2026 | UMC UNITED MICROELECTRONICS CORP | SOpen-market sale Common Shares | -1,200,000 | $142.33 | $171M | 3,039,757 | 26 d ago |
| Sep 17, 2026 | UMC UNITED MICROELECTRONICS CORP | SOpen-market sale Common Shares | -400,000 | $145.00 | $58M | 2,639,757 | 26 d ago |
| Sep 7, 2026 | UMC UNITED MICROELECTRONICS CORP | JOther Common Shares | +1,000,000 | $0.00 | $0 | 4,322,917 | 35 d ago |
| Sep 7, 2026 | UMC UNITED MICROELECTRONICS CORP | JOther Common Sharesindirect: By CTBC Bank Trust | -1,000,000 | $0.00 | $0 | 1,000,000 | 35 d ago |
| Jul 13, 2026 | UMC UNITED MICROELECTRONICS CORP | SOpen-market sale Common Shares | -1,900,000 | $154.89 | $294M | 3,322,917 | Jul 13, 2026 |
Questions about Chitung Liu
Answered from the filings on this page, as of the latest one.
Is Chitung Liu buying or selling?
In the last 12 months Chitung Liu reported 0 open-market buys worth $0 and 2 open-market sells worth $523M on SEC Form 4; the latest was sold $229M of UMC on Sep 16, 2026. Grants, option exercises and tax withholding are not counted.
How did Chitung Liu's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Chitung Liu has 0.
Where does Chitung Liu file Form 4?
Chitung Liu has filed Form 4 at UMC (UNITED MICROELECTRONICS CORP) as CFO & SVP. A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.