TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD (TSM)
Data as of , from SEC Form 4 filings.
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About TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD (TSM)
Taiwan Semiconductor Manufacturing Co. is the world's largest dedicated chip foundry, with about 70% market share in 2025. TSMC was founded in 1987 as a joint venture of Philips, the government of Taiwan, and private investors. It went public in Taiwan in 1994 and as an ADR in the US in 1997. TSMC's scale and high-quality technology allow the firm to generate solid operating margins, even in the highly competitive foundry business. Furthermore, the shift to the fabless business model has created tailwinds for TSMC. The foundry leader has an illustrious base of customers, including Apple, AMD, and Nvidia, that look to apply its cutting-edge process technologies to their semiconductor designs. TSMC employs more than 83,000 people.
- 90,557
- 1997
- XNYS
TSM Form 4 activity by transaction type, last 90 days
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Open-market purchase | 112 | 20,126 | $1.50M |
| Grant or award | 21 | 492,721 | |
| Bona-fide gift | 2 | 10,000,000 |
Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.
TSM insider transactions (Form 4)
33256 Form 4 filings on record, the earliest from Mar 24, 2026, newest first. Filing history page 3 of 3.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Shu-Hua Fang - Officer | Open-market purchase | Common Shares (2330.TW) | 1,000 | $77.09 footnote F3 | $77K | |
| Shu-Hua Fang - Officer | Open-market purchase | Common Shares (2330.TW) | 1,000 | $77.09 footnote F3 | $77K | |
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 Choh Fei Yeap - Officer | Grant or award | Common Shares (2330.TW) | 12,881 footnote F1 | $0.00 | - | |
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| Chue-San Yoo - Officer | Grant or award | Common Shares (2330.TW) | 8,175 footnote F1 | $0.00 | - | |
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| Shien-Yang Wu - Officer | Grant or award | Common Shares (2330.TW) | 12,881 footnote F1 | $0.00 | - | |
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 Kevin Xiaoqiang Zhang - Officer | Grant or award | Common Shares (2330.TW) | 20,313 footnote F1 | $0.00 | - | |
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 Che-Chia Wei - Officer | Grant or award | Common Shares (2330.TW) | 204,375 footnote F1 | $0.00 | - | |
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| Yuh-Jier Mii - Officer | Grant or award | Common Shares (2330.TW) | 32,204 footnote F1 | $0.00 | - | |
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 Ying-Lang Wang - Officer | Grant or award | Common Shares (2330.TW) | 12,881 footnote F1 | $0.00 | - | |
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| Lee-Chung Lu - Officer | Grant or award | Common Shares (2330.TW) | 8,175 footnote F1 | $0.00 | - | |
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 Chris Horng-Dar Lin - Officer | Grant or award | Common Shares (2330.TW) | 8,175 footnote F1 | $0.00 | - | |
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| Chun-Hsien Lee - Officer | Grant or award | Common Shares (2330.TW) | 12,881 footnote F1 | $0.00 | - | |
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| Kuo-Chin Hsu - Officer | Grant or award | Common Shares (2330.TW) | 8,175 footnote F1 | $0.00 | - | |
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| Jen-Chau Huang - Officer | Grant or award | Common Shares (2330.TW) | 20,313 footnote F1 | $0.00 | - | |
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| Syun-Ming Jang - Officer | Grant or award | Common Shares (2330.TW) | 8,175 footnote F1 | $0.00 | - | |
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| Jun He - Officer | Grant or award | Common Shares (2330.TW) | 8,175 footnote F1 | $0.00 | - | |
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| Yung-Chin Hou - Officer | Grant or award | Common Shares (2330.TW) | 20,313 footnote F1 | $0.00 | - | |
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| Tzu-Sou Chuang - Officer | Grant or award | Common Shares (2330.TW) | 8,175 footnote F1 | $0.00 | - | |
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| Yung-Pei Chin - Officer | Grant or award | Common Shares (2330.TW) | 32,204 footnote F1 | $0.00 | - | |
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| Tzonz-Sheng Chang - Officer | Grant or award | Common Shares (2330.TW) | 12,881 footnote F1 | $0.00 | - | |
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| Shu-Hua Fang - Officer | Grant or award | Common Shares (2330.TW) | 20,313 footnote F1 | $0.00 | - | |
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 Min Cao - Officer | Grant or award | Common Shares (2330.TW) | 12,881 footnote F1 | $0.00 | - | |
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| Juiping Chuang - Officer | Grant or award | Common Shares (2330.TW) | 8,175 footnote F1 | $0.00 | - | |
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| Lipen Yuan - Officer | Open-market purchase | Common Shares (2330.TW) | 1,000 | $74.50 footnote F1 | $75K | |
| Lipen Yuan - Officer | Open-market purchase | Common Shares (2330.TW) | 1,000 | $73.77 footnote F2 | $74K | |
| Lipen Yuan - Officer | Open-market purchase | Common Shares (2330.TW) | 350 | $73.58 footnote F4 | $26K | |
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| Choh Fei Yeap - Officer | Open-market purchase | Common Shares (2330.TW) | 57 | $73.31 footnote F2 | $4K | |
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| Kevin Xiaoqiang Zhang - Officer | Open-market purchase | Common Shares (2330.TW) | 63 | $73.31 footnote F3 | $5K | |
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| Lipen Yuan - Officer | Open-market purchase | Common Shares (2330.TW) | 42 | $73.31 footnote F2 | $3K | |
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| Yi-Huang Wu - Officer | Open-market purchase | Common Shares (2330.TW) | 41 | $73.31 footnote F2 | $3K | |
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| Chue-San Yoo - Officer | Open-market purchase | Common Shares (2330.TW) | 51 | $73.31 footnote F2 | $4K | |
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| Yuh-Jier Mii - Officer | Open-market purchase | Common Shares (2330.TW) | 72 | $73.31 footnote F3 | $5K | |
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| Ying-Lang Wang - Officer | Open-market purchase | Common Shares (2330.TW) | 55 | $73.31 footnote F2 | $4K | |
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See every TSM filing on record
These pages show the latest 90 of 256 Form 4 filings on record. The 7-day demo shows all 256, and sign-up brings you back to this table.
Stock trades in TSM disclosed by members of the U.S. House in the last 12 months, newest first. Values are the ranges as filed.
| Member | Type | Traded | Disclosed | Value range | Owner | Days to disclose | Filing |
|---|---|---|---|---|---|---|---|
 Gilbert Ray Cisneros, Jr.Democrat, CA-31 | Purchase |
TSM insider trading FAQ
What is the latest insider trade for TSM?
TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD (TSM) had 120 insider filings in the last 90 days, with the most recent on 2026-10-08. The full record for TSM runs to 256 Form 4 filings, the earliest from 2026-03-24. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying TSM stock?
112 insider purchases of TSM were filed in the last 90 days, totaling $1.50M.
How many insiders are selling TSM stock?
No insider sales of TSM were filed in the last 90 days. 2 sales are on record for this company.
Where can I see TSM SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects TSM Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
More Information Technology companies with insider activity
Recent insider filings
10The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.
- - Lipen Yuan view on EDGAR
- - Choh Fei Yeap view on EDGAR
- - Kevin Xiaoqiang Zhang view on EDGAR
- - Chue-San Yoo view on EDGAR
- - Shien-Yang Wu view on EDGAR
- - Che-Chia Wei view on EDGAR
- - Yi-Huang Wu view on EDGAR
- - Ying-Lang Wang view on EDGAR
- - Yuh-Jier Mii view on EDGAR
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Learn more
- How to read insider buying signals
- What an open-market purchase by an insider can and cannot tell you.
- Insider activity in Information Technology
- Where TSM's peers are being bought and sold.
- Every recent Form 4
- The market-wide feed, updated as filings arrive from SEC EDGAR.
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