Tzu-Sou Chuang insider trades: Taiwan Semiconductor Manufacturing (TSM) stock buys and sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Tzu-Sou reports to the SEC
Open-market buys and sales
8 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Oct 7, 2026 | TSM | ↑ Buy | 46 | $79.39 | $4K | By ESPP Trust | Oct 8, 2026 (1d) |
| Sep 7, 2026 | TSM | ↑ Buy | 47 | $76.20 | $4K | By ESPP Trust | Sep 9, 2026 (2d) |
| Aug 7, 2026 | TSM | ↑ Buy | 47 | $73.31 | $3K | By ESPP Trust | Aug 10, 2026 (3d) |
| Jul 7, 2026 | TSM | ↑ Buy | 45 | $76.62 | $3K | By ESPP Trust | Jul 9, 2026 (2d) |
| Jun 5, 2026 | TSM | ↑ Buy | 46 | $76.01 | $3K | By ESPP Trust | Jun 9, 2026 (4d) |
| May 19, 2026 | TSM | ↓ Sell | 200,000 | $69.83 | $14.0M | Direct | May 19, 2026 (0d) |
| May 8, 2026 | TSM | ↑ Buy | 48 | $71.82 | $3K | By ESPP Trust | May 11, 2026 (3d) |
| Apr 9, 2026 | TSM | ↑ Buy | 58 | $57.87 | $3K | By ESPP Trust | Apr 13, 2026 (4d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other TSM insiders
Open-market trades in the last 12 months
About Tzu-Sou Chuang's insider trades
Tzu-Sou Chuang is VP at Taiwan Semiconductor Manufacturing (TSM). Since Apr 9, 2026, Tzu-Sou has reported 7 open-market purchases worth $24K and 1 sale worth $14.0M on SEC Form 4. In the last 12 months: 7 buys ($24K) and 1 sale ($14.0M).
Their filings also include grants and awards (1 filing), gifts (1 filing). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every TSM insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.