TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD (TSM)
$418.84-$8.46 (-1.98%) Today
Choh Fei Yeap - Officer
Kevin Xiaoqiang Zhang - OfficerTaiwan 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.
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Open-market purchase | 117 | 22,301 | $1.66M |
| Open-market sale | 1 | 50 | $4K |
| Bona-fide gift | 6 | 11,346,000 |
Dollar totals are shown for open-market purchases and sales only. Grants, option exercises, gifts and tax withholding are reported by share count because they are not trades at a market price.
174 Form 4 filings on record, the earliest from Mar 24, 2026, newest first. Filing history page 1 of 3.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Lipen Yuan - Officer | Open-market purchase | Common Shares (2330.TW) | 1,000 | $74.50 | $75K | |
| Lipen Yuan - Officer | Open-market purchase | Common Shares (2330.TW) | 1,000 | $73.77 | $74K | |
| Lipen Yuan - Officer | Open-market purchase | Common Shares (2330.TW) | 350 | $73.58 | $26K | |
| Choh Fei Yeap - Officer | Open-market purchase | Common Shares (2330.TW) | 57 | $73.31 | $4K | |
| Kevin Xiaoqiang Zhang - Officer | Open-market purchase | Common Shares (2330.TW) | 63 | $73.31 | $5K | |
| Lipen Yuan - Officer | Open-market purchase | Common Shares (2330.TW) | 42 | $73.31 | $3K | |
| Yi-Huang Wu - Officer | Open-market purchase | Common Shares (2330.TW) | 41 | $73.31 | $3K | |
| Chue-San Yoo - Officer | Open-market purchase | Common Shares (2330.TW) | 51 | $73.31 | $4K | |
| Yuh-Jier Mii - Officer | Open-market purchase | Common Shares (2330.TW) | 72 | $73.31 | $5K | |
 Ying-Lang Wang - Officer | Open-market purchase | Common Shares (2330.TW) | 55 | $73.31 | $4K | |
| Che-Chia Wei - Officer | Open-market purchase | Common Shares (2330.TW) | 152 | $73.31 | $11K | |
| Shien-Yang Wu - Officer | Open-market purchase | Common Shares (2330.TW) | 57 | $73.31 | $4K | |
| Bor-Zen Tien - Officer | Open-market purchase | Common Shares (2330.TW) | 42 | $73.31 | $3K | |
| Bor-Zen Tien - Officer | Open-market purchase | Common Shares (2330.TW) | 7 | $73.31 | $513 | |
 Chris Horng-Dar Lin - Officer | Open-market purchase | Common Shares (2330.TW) | 49 | $73.31 | $4K | |
| Lee-Chung Lu - Officer | Open-market purchase | Common Shares (2330.TW) | 52 | $73.31 | $4K | |
 Shyue-Shyh Lin - Officer | Open-market purchase | Common Shares (2330.TW) | 47 | $73.31 | $3K | |
| Chun-Hsien Lee - Officer | Open-market purchase | Common Shares (2330.TW) | 54 | $73.31 | $4K | |
| Chin-Sheng Lu - Officer | Open-market purchase | Common Shares (2330.TW) | 39 | $73.31 | $3K | |
| Syun-Ming Jang - Officer | Open-market purchase | Common Shares (2330.TW) | 50 | $73.31 | $4K | |
| Kuo-Chin Hsu - Officer | Open-market purchase | Common Shares (2330.TW) | 54 | $73.31 | $4K | |
| Jen-Chau Huang - Officer | Open-market purchase | Common Shares (2330.TW) | 29 | $73.31 | $2K | |
| Yuan-Ko Hwang - Officer | Open-market purchase | Common Shares (2330.TW) | 40 | $73.31 | $3K | |
| Yao-Ching Ku - Officer | Open-market purchase | Common Shares (2330.TW) | 47 | $73.31 | $3K | |
| Jun He - Officer | Open-market purchase | Common Shares (2330.TW) | 46 | $73.31 | $3K | |
| Tzu-Sou Chuang - Officer | Open-market purchase | Common Shares (2330.TW) | 47 | $73.31 | $3K | |
| Yung-Chin Hou - Officer | Open-market purchase | Common Shares (2330.TW) | 63 | $73.31 | $5K | |
| Juiping Chuang - Officer | Open-market purchase | Common Shares (2330.TW) | 49 | $73.31 | $4K | |
| Shu-Hua Fang - Officer | Open-market purchase | Common Shares (2330.TW) | 57 | $73.31 | $4K | |
| Tzonz-Sheng Chang - Officer | Open-market purchase | Common Shares (2330.TW) | 54 | $73.31 | $4K | |
| Chih-Ho Chen - Officer | Open-market purchase | Common Shares (2330.TW) | 33 | $73.31 | $2K | |
| Pei-Hung Chen - Officer | Open-market purchase | Common Shares (2330.TW) | 46 | $73.31 | $3K | |
 Min Cao - Officer | Open-market purchase | Common Shares (2330.TW) | 55 | $73.31 | $4K |
TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD (TSM) had 106 insider filings in the last 90 days, with the most recent on 2026-08-20. The full record for TSM runs to 174 Form 4 filings, the earliest from 2026-03-24. InsiderAlpha tracks every Form 4, Form 144, and 8-K filing in real time.
117 insider purchases of TSM were filed in the last 90 days, totaling $1.66M.
1 insider sale of TSM was filed in the last 90 days, totaling $4K.
This page tracks TSM Form 4 insider transactions, Form 144 sale notices, and 8-K material event disclosures in one timeline. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
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Every Form 4 below links to the original document on SEC EDGAR, so the numbers on this page can be checked against the filing they came from.
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