Yao-Ching Ku
CIK 2135989 · View on SEC EDGAR ↗
Insider
First SEC filing: June 1, 2026 · Latest: June 9, 2026
On this page
Insider at
Insider transactions
3 buys (P)
0 sells (S)
Net:
$10,619
Avg return of open purchases vs now:
458.1%
last 12 months, based on the transactions shown below
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 |
|---|---|---|---|---|---|---|---|---|---|
| Aug. 7, 2026 | TSM | P | 47 | $73.31 | $3,446 | 141 Indirect | +50.00% | Acquired | 473.2% (price as of 2026-08-21) |
| July 7, 2026 | TSM | P | 46 | $76.62 | $3,525 | 94 Indirect | +95.83% | Acquired | 448.4% (price as of 2026-08-21) |
| June 5, 2026 | TSM | P | 48 | $76.01 | $3,648 | 48 Indirect | — | Acquired | 452.8% (price as of 2026-08-21) |
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) 6 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| June 23, 2026 | TSM | Common Shares (2330.TW) | 30,851 | Direct |
| June 23, 2026 | TSM | Common Shares (2330.TW) | 72,946 | Indirect |
| June 23, 2026 | TSM | Common Shares (2330.TW) | 131,000 | Indirect |
| June 1, 2026 | TSM | Common Shares (2330.TW) | 30,851 | Direct |
| June 1, 2026 | TSM | Common Shares (2330.TW) | 73,396 | Indirect |
| June 1, 2026 | TSM | Common Shares (2330.TW) | 131,000 | Indirect |