Latest SEC filings for Taiwan Semiconductor Manufacturing Company Limited (TSM) explained in plain English. Covers insider buying and selling (Form 4), proposed insider sales (Form 144), material company events (8-K), and quarterly & annual reports (10-Q / 10-K). All data sourced directly from SEC EDGAR — last updated 2026-08-04.
Tien Bor-Zen, listed as VP at TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD, reported an open-market purchase of 1,000 TSM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.
Tseng Fang Churng (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.
Tien Bor-Zen, listed as VP at TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD, reported an open-market purchase of 1,015 TSM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.
Tien Bor-Zen, listed as VP at TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD, reported an open-market purchase of 4,010 TSM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.
Lin Shyue-Shyh, listed as VP at TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD, reported an open-market purchase of 2,000 TSM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.
Lin Shyue-Shyh, listed as VP at TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD, reported an open-market purchase of 3,000 TSM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.
Chen Chih-Ho (Controller) filed a Form 4 showing both purchase and sale activity. Review the SEC filing for the transaction-by-transaction details before drawing a directional conclusion.
Wang Ying-Lang, listed as SVP at TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD, reported an open-market purchase of 53 TSM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.
Jang Syun-Ming, listed as VP at TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD, reported an open-market purchase of 47 TSM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.
Wu Shien-Yang, listed as SVP at TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD, reported an open-market purchase of 54 TSM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.
Ku Yao-Ching, listed as VP at TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD, reported an open-market purchase of 46 TSM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.
Chuang Juiping, listed as VP at TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD, reported an open-market purchase of 47 TSM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.
Lin Chris Horng-Dar, listed as VP and CIO at TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD, reported an open-market purchase of 46 TSM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.
Chang Tzonz-Sheng, listed as SVP at TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD, reported an open-market purchase of 52 TSM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.
Wei Che-Chia, listed as Director, Chairman and CEO at TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD, reported an open-market purchase of 146 TSM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.
Lee Chun-Hsien, listed as SVP at TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD, reported an open-market purchase of 50 TSM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.
Chen Pei-Hung, listed as VP at TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD, reported an open-market purchase of 44 TSM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.
Tien Bor-Zen, listed as VP at TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD, reported an open-market purchase of 46 TSM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.
Wu Yi-Huang, listed as VP at TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD, reported an open-market purchase of 39 TSM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.
Hou Yung-Chin, listed as SVP and Deputy Co-COO at TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD, reported an open-market purchase of 61 TSM shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.
Executives, directors, and large shareholders must report any purchase or sale of TSM shares within two business days. Consistent buying by multiple insiders is often read as a confidence signal; large sales may reflect diversification or liquidity needs rather than negative conviction.
Filed when a company affiliate intends to sell restricted or control shares. A Form 144 is a notice of intent, not confirmation — the actual sale is later confirmed via Form 4. It gives investors advance visibility into planned insider selling activity.
The 8-K is an event-driven filing that Taiwan Semiconductor Manufacturing Company Limited must submit within four business days of a significant development — including earnings results, mergers, executive changes, credit facility updates, or regulatory actions. Each 8-K item code maps to a specific event type.
The 10-Q (quarterly) and 10-K (annual) are comprehensive reports covering Taiwan Semiconductor Manufacturing Company Limited's financial results, risk factors, management discussion, and business operations. The 10-K includes audited financials and is the most complete public disclosure the company makes each year.
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