Transactions
10
Insider / TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD
Chuang Tzu-Sou
VP at TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD
- Ticker
- TSM
- First filing on record
- April 13, 2026
- Latest trade on record
- September 7, 2026
- SEC filings
- EDGAR ↗
Chuang Tzu-Sou, VP at TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD, has disclosed 10 transactions in TSM since April 13, 2026: 6 purchases (6 open-market buys) and 1 sale, worth about $14.0M at the reported prices. The latest was filed September 9, 2026, 2 days after the trade.
Open-market buys
6
Sales
1
Avg. disclosure lag
2.0d
Trading in charts
Trade timeline
When does this person trade, how big, and in which direction? Every trade in the last 12 months.
Bought (above the line)Sold (below the line)Other transaction
In the last 12 months Chuang Tzu-Sou made 6 purchases worth $21K and 1 sale worth $14M, plus 3 other transactions. Dot size is the dollar amount.
Portfolio mix
Which stocks does this person trade most? Tile size is dollars traded, all time on record.
Chuang Tzu-Sou has traded 1 stock on record; the largest by dollars is TSM.
Reporting lag
Does this person report on time? One bar per filing against the Form 4 deadline.
On timeLate
0 of 9 filings on record were reported after the Form 4 deadline (two business days, counted here as 4 calendar days).
What kind of transactions
Most Form 4 rows are pay arriving or tax being withheld, not a decision to buy or sell. Only code P is an open-market purchase and code S an open-market sale. What each code means: Form 4 transaction codes.
| Code | Meaning | Rows | Shares | Value |
|---|---|---|---|---|
| P | Open-market purchase | 6 | 291 | $21K |
| G | Gift | 2 | 1,000,000 | — |
| A | Grant or award | 1 | 8,175 | — |
| S | Open-market sale | 1 | 200,000 | $14.0M |
| Year | Rows | Bought | Sold |
|---|---|---|---|
| 2026 | 10 | 6 · $21K | 1 · $14.0M |
Transactions
| Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| TSM | Buy P | September 7, 2026 | September 9, 2026 | 2d | 47 | $76 | $3,581 | indirect | Form 4 ↗ | |
| TSM | Other A | September 1, 2026 | September 2, 2026 | 1d | 8,175 | — | — | Form 4 ↗ | ||
| TSM | Buy P | August 7, 2026 | August 10, 2026 | 3d | 47 | $73 | $3,446 | indirect | Form 4 ↗ | |
| TSM | Buy P | July 7, 2026 | July 9, 2026 | 2d | 45 | $77 | $3,448 | indirect | Form 4 ↗ | |
| TSM | Other G | June 24, 2026 | June 24, 2026 | 0d | 500,000 | — | — | Form 4 ↗ | ||
| TSM | Buy P | June 5, 2026 | June 9, 2026 | 4d | 46 | $76 | $3,496 | indirect | Form 4 ↗ | |
| TSM | Other G | June 8, 2026 | June 9, 2026 | 1d | 500,000 | — | — | Form 4 ↗ | ||
| TSM | Sell S | May 19, 2026 | May 19, 2026 | 0d | 200,000 | $70 | $14.0M | Form 4 ↗ | ||
| TSM | Buy P | May 8, 2026 | May 11, 2026 | 3d | 48 | $72 | $3,447 | indirect | Form 4 ↗ | |
| TSM | Buy P | April 9, 2026 | April 13, 2026 | 4d | 58 | $58 | $3,356 | indirect | Form 4 ↗ |
Filings
| Filed | Form | Accession | Rows | Status | Source |
|---|---|---|---|---|---|
| September 9, 2026 | Form 4 | 0001046179-26-000612 | 1 | published | EDGAR ↗ |
| September 2, 2026 | Form 4 | 0001046179-26-000579 | 1 | published | EDGAR ↗ |
| August 10, 2026 | Form 4 | 0001046179-26-000492 | 1 | published | EDGAR ↗ |
| July 9, 2026 | Form 4 | 0001046179-26-000420 | 1 | published | EDGAR ↗ |
| June 24, 2026 | Form 4 | 0001046179-26-000375 | 1 | published | EDGAR ↗ |
| June 9, 2026 | Form 4 | 0001046179-26-000341 | 2 | published | EDGAR ↗ |
| May 19, 2026 | Form 4 | 0001046179-26-000286 | 1 | published | EDGAR ↗ |
| May 11, 2026 | Form 4 | 0001046179-26-000233 | 1 | published | EDGAR ↗ |
| April 13, 2026 | Form 4 | 0001046179-26-000155 | 1 | published | EDGAR ↗ |
Other insiders at TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD
- Tien Bor-Zen VP 34 rows
- Lin Shyue-Shyh VP 13 rows
- Yuan Lipen VP 12 rows
- Chang Tzonz-Sheng SVP 9 rows
- Fang Shu-Hua SVP and GC 9 rows
- Mii Yuh-Jier EVP and Co-COO 9 rows
- Yeap Choh Fei SVP 9 rows
- Chen Chih-Ho Controller 8 rows
- Wang Ying-Lang SVP 8 rows
- Wei Che-Chia Chairman and CEO 8 rows
Everyone on file, with contracts and lobbying under the company's name: TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD.
Guides for this page
- What is SEC Form 4? Who files: officers, directors and owners of more than 10% of a class of the company's shares.
- Form 4 transaction codes P = purchase. S = sale. These are the two market trades.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- What disclosure data cannot tell you Filings are late by design: up to 45 days for Congress, two business days for insiders.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| SEC EDGAR, Form 4 | 9 | 10 | April 13, 2026 | September 9, 2026 | Form 4 list on EDGAR |
Site built October 27, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.
Every row comes from the reporting owner's Form 4 as filed with the SEC (EDGAR ownership XML), read daily. "Value" is shares × the reported price; code P is an open-market purchase, S a sale, M an option exercise, A a grant. The lag is the filing date minus the trade date; Form 4 is due within two business days. Amendments (4/A) are not merged. Details on the methodology page; report an error on corrections.
Not investment advice. Figures are public disclosures shown as filed; they may lag the trade and may be amended later. No recommendation is made or implied.