Insider · CIK 0002135989
Yao-Ching Ku
Files at TSM (TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD). First filing Jun 9, 2026, latest Oct 8, 2026.
In brief
Yao-Ching Ku files SEC Form 4 as officer at TSM (TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD). Since Jun 9, 2026, Yao-Ching Ku has reported 5 open-market buys worth $18k and 0 open-market sells worth $0, the latest filed on Oct 8, 2026.
A track record needs three past buys with six months of prices behind them; Yao-Ching Ku has 0, so none is measured yet.
The newest scored trade: bought $3,652 of TSM on Oct 7, 2026, filed Oct 8, 2026, scored 41 (moderate). In the last 12 months: 5 buys worth $18k and 0 sells worth $0.
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
TSM: TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD
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 |
|---|---|---|---|---|---|
| 41Moderate | TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | $3,652 46 shares | +24% | +73% from low-3% from high | |
| 36Weak | TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | $3,581 47 shares | +33% | +84% from low-10% from high | |
| 45Moderate | TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | $3,446 47 shares | +50% | +87% from low-12% from high | |
| 45Moderate | TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | $3,525 46 shares | +96% | +92% from low-9% from high | |
| 38Weak | TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | $3,648 48 shares | - | +107% from low-7% from high |
Transactions
Every row this insider has filed, 5 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Oct 7, 2026 | TSM TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | POpen-market purchase Common Shares (2330.TW)indirect: By ESPP Trust | +46 | $79.39 | $3,652 | 234 | 5 d ago |
| Sep 7, 2026 | TSM TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | POpen-market purchase Common Shares (2330.TW)indirect: By ESPP Trust | +47 | $76.20 | $3,581 | 188 | 34 d ago |
| Aug 7, 2026 | TSM TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | POpen-market purchase Common Shares (2330.TW)indirect: By ESPP Trust | +47 | $73.31 | $3,446 | 141 | Aug 10, 2026 |
| Jul 7, 2026 | TSM TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | POpen-market purchase Common Shares (2330.TW)indirect: By ESPP Trust | +46 | $76.62 | $3,525 | 94 | Jul 9, 2026 |
| Jun 5, 2026 | TSM TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | POpen-market purchase Common Shares (2330.TW)indirect: By ESPP Trust | +48 | $76.01 | $3,648 | 48 | Jun 9, 2026 |
Questions about Yao-Ching Ku
Answered from the filings on this page, as of the latest one.
Is Yao-Ching Ku buying or selling?
In the last 12 months Yao-Ching Ku reported 5 open-market buys worth $18k and 0 open-market sells worth $0 on SEC Form 4; the latest was bought $3,652 of TSM on Oct 7, 2026. Grants, option exercises and tax withholding are not counted.
How did Yao-Ching Ku's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Yao-Ching Ku has 0.
Where does Yao-Ching Ku file Form 4?
Yao-Ching Ku has filed Form 4 at TSM (TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD) as VP. 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.