TSM insider buying
17 cluster buysTAIWAN SEMICONDUCTOR MANUFACTURING CO LTD
When two or more insiders at TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD buy TSM on the open market around the same time, that clustered conviction is one of the highest-signal patterns in SEC filing data. Below is every cluster we've detected in TSM plus the full record of qualifying open-market buys, each parsed directly from Form 4 filings and linked back to the source on SEC EDGAR.
Detected clusters
- Jul 2 – Sep 7, 2026Detected Sep 9, 2026High conviction31 insidersTotal bought$1.5MMarket capUnknown
- Jul 2 – Sep 7, 2026Detected Sep 9, 2026High conviction31 insidersTotal bought$1.4MMarket capUnknown
- Jul 2 – Aug 19, 2026Detected Sep 4, 2026High conviction31 insidersTotal bought$1.4MMarket capUnknown
14 more clusters in TSM
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All notable open-market buys in TSM
Every open-market Form 4 purchase, newest first. Click an insider to see their full buying record across companies.
| Date | Insider | Shares | Price | Value | Filing |
|---|---|---|---|---|---|
| Sep 7, 2026 | Wei Che-Chiacluster Director, Chairman and CEO | 149 | $76.20 | $11.4K | SEC ↗ |
| Sep 7, 2026 | Chin Yung-Peicluster EVP and Co-COO | 71 | $76.20 | $5.4K | SEC ↗ |
| Sep 7, 2026 | Mii Yuh-Jiercluster EVP and Co-COO | 71 | $76.20 | $5.4K | SEC ↗ |
| Sep 7, 2026 | Hou Yung-Chincluster SVP and Deputy Co-COO | 61 | $76.20 | $4.6K | SEC ↗ |
| Sep 7, 2026 | Zhang Kevin Xiaoqiangcluster SVP and Deputy Co-COO | 61 | $76.20 | $4.6K | SEC ↗ |
| Sep 7, 2026 | Wu Shien-Yangcluster SVP | 57 | $76.20 | $4.3K | SEC ↗ |
| Sep 7, 2026 | Cao Mincluster VP | 56 | $76.20 | $4.3K | SEC ↗ |
| Sep 7, 2026 | Fang Shu-Huacluster SVP and GC | 56 | $76.20 | $4.3K | SEC ↗ |
| Sep 7, 2026 | Hsu Kuo-Chincluster VP | 55 | $76.20 | $4.2K | SEC ↗ |
| Sep 7, 2026 | Yeap Choh Feicluster SVP | 54 | $76.20 | $4.1K | SEC ↗ |
| Sep 7, 2026 | Wang Ying-Langcluster SVP | 54 | $76.20 | $4.1K | SEC ↗ |
| Sep 7, 2026 | Yoo Chue-Sancluster VP | 53 | $76.20 | $4.0K | SEC ↗ |
| Sep 7, 2026 | Chang Tzonz-Shengcluster SVP | 53 | $76.20 | $4.0K | SEC ↗ |
| Sep 7, 2026 | Lee Chun-Hsiencluster SVP | 52 | $76.20 | $4.0K | SEC ↗ |
| Sep 7, 2026 | Lu Lee-Chungcluster VP | 51 | $76.20 | $3.9K | SEC ↗ |
| Sep 7, 2026 | Chuang Juipingcluster VP | 50 | $76.20 | $3.8K | SEC ↗ |
| Sep 7, 2026 | Jang Syun-Mingcluster VP | 49 | $76.20 | $3.7K | SEC ↗ |
| Sep 7, 2026 | Ku Yao-Chingcluster VP | 47 | $76.20 | $3.6K | SEC ↗ |
| Sep 7, 2026 | Chuang Tzu-Soucluster VP | 47 | $76.20 | $3.6K | SEC ↗ |
| Sep 7, 2026 | Lin Chris Horng-Darcluster VP and CIO | 47 | $76.20 | $3.6K | SEC ↗ |
| Sep 7, 2026 | Chen Pei-Hungcluster VP | 46 | $76.20 | $3.5K | SEC ↗ |
| Sep 7, 2026 | He Juncluster VP | 46 | $76.20 | $3.5K | SEC ↗ |
| Sep 7, 2026 | Lin Shyue-Shyhcluster VP | 44 | $76.20 | $3.4K | SEC ↗ |
| Sep 7, 2026 | Tien Bor-Zencluster VP | 43 | $76.20 | $3.3K | SEC ↗ |
| Sep 7, 2026 | Yuan Lipencluster VP | 41 | $76.20 | $3.1K | SEC ↗ |
TSM insider buying — FAQ
- Are insiders buying TSM stock?
- Yes — 34 distinct insiders have bought TSM (TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD) on the open market, including 17 cluster buys where two or more insiders bought within a rolling window. The most recent qualifying activity was Sep 9, 2026.
- How much TSM stock have insiders bought?
- Insiders have bought a combined $2.2M of TSM across 119 open-market purchases, based on SEC Form 4 filings.
- What is an insider cluster buy in TSM?
- A cluster buy is two or more distinct TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD insiders — officers, directors, or 10% owners — each buying TSM on the open market within a rolling window. TSM has 17 detected cluster buys to date.
- Where does this TSM insider trading data come from?
- Every figure is parsed directly from SEC Form 4 filings on EDGAR, and each purchase on this page links back to its original filing document.
How we track insider buying in TSM
We continuously poll SEC EDGAR for new Form 4 filings and parse every open-market purchase (transaction code P). A cluster is recorded when two or more distinct insiders — officers, directors, or 10% owners — each buy TSM within a rolling window. We track clusters at every company size, from micro-caps to mega-caps. Every figure on this page traces back to an official filing; open any row to jump straight to the source document. What counts as a cluster buy?
This page is informational and reflects public filing data. It is not investment advice or a recommendation regarding TSM.