Chuang Tzu-Sou
Officer · TSM
As of 2026-09-16, Chuang Tzu-Sou has 10 Form 4 transactions on record across 1 company — 10 in the trailing 12 months.
Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.
Reconstructed holdings
Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.
Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.
Trades by company
Filing ledger
| Date | Company | Action | Shares @ price | Value | Ownership Δ | Owned after | Filing |
|---|---|---|---|---|---|---|---|
| 2026-09-07 | TSM | Purchase | 47 @ $76.20 | $4K | +0.8% of holding | 5,853 | Form 4 |
| 2026-08-07 | TSM | Purchase | 47 @ $73.31 | $3K | +0.8% of holding | 5,806 | Form 4 |
| 2026-07-07 | TSM | Purchase | 45 @ $76.62 | $3K | +0.8% of holding | 5,759 | Form 4 |
| 2026-06-05 | TSM | Purchase | 46 @ $76.01 | $3K | +0.8% of holding | 5,714 | Form 4 |
| 2026-05-19 | TSM | Sale | 200,000 @ $69.83 | $14.0M | −7.4% of holding | 2,495,165 | Form 4 |
| 2026-05-08 | TSM | Purchase | 48 @ $71.82 | $3K | +0.9% of holding | 5,668 | Form 4 |
| 2026-04-09 | TSM | Purchase | 58 @ $57.87 | $3K | +1.0% of holding | 5,620 | Form 4 |
3 award / exercise / gift records — not counted as purchases
Source: SEC Form 4 filings. Each row links to its original filing.
Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.