TSMTAIWAN SEMICONDUCTOR MANUFACTURING CO LTD Insider Trading
Latest: Chair Bought $11K of Shares · Jul 2026
Multiple insiders have been active at TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD (TSM): 3 distinct insiders account for 3 buy filings and 0 sell filings as of Jul 2026. Its highest-significance filing in the last 90 days: Chair Che-Chia Wei bought $11K, transaction dated Jul 2026.
3 filings analyzed·Latest 2026-07-09
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Buys
3
Sells
0
Insiders
3
Direction
Net buying
High conviction
This is a high-conviction signal — the insider is a first-time or occasional buyer, historically the strongest subset. Such buys have outperformed the S&P 500 by a median ~3% over the 30 days after the trade (n ≈ 3,001, 2024-2026). Past results don't predict the future. How we measure this ↗
CEO Che-Chia Wei buys 146 TSM shares at $76.62; 8 other insiders bought within 14 days
Che-Chia Wei, Chairman and CEO, purchased 146 shares at $76.62 on 2026-07-07, increasing his holdings from 17,689 to 17,835 shares. This purchase occurs amid a cluster pattern: 8 other insiders have also bought within the past 14 days, suggesting coordinated or independently motivated insider accumulation at the company. The stock has risen 19.6% over the past 90 days and is currently trading at $436.98, up 2.4% in the past 30 days, indicating positive recent momentum. The clustered buying activity by multiple insiders across a two-week window merits monitoring as a potential signal of internal sentiment.
TSM VP Tien Bor-Zen buys 20 shares across 3 transactions totaling $7,760.00 at blended average $388.00
VP Tien Bor-Zen executed 3 separate purchases on 2026-04-28, acquiring a total of 20 shares at prices ranging from $386.00 to $390.00 for a combined $7,760.00, raising his holdings from 70 to 90 shares (+28.6%). The current price of $393.83 sits -2.8% from the 52-week high of $404.98. His cross-ticker track record shows 3 prior buys with an average 30-day return of +558.1%, while his prior trades at TSM include two recent buys on 2026-04-09 with outcomes not yet measurable and one buy on 2026-03-22 that delivered a +558.1% 30-day return. The modest transaction size relative to TSM's market cap of $10,213.0B and the absence of measurable 90-day outcomes on his same-ticker history limit the signal strength of this single-day multi-tranche purchase.
Director Ursula M. Burns bought 1,000 TSM shares at $322.05 on 2026-03-31; 3 other insiders bought within 14 days
Ursula M. Burns, a Director of Taiwan Semiconductor Manufacturing Co Ltd, purchased 1,000 shares at $322.05, increasing her holdings from 2,000 to 3,000 shares (+50.0% net change). The transaction is part of a cluster pattern where 3 other insiders also bought within the past 14 days, suggesting coordinated activity at the board/management level. The current stock price of $341.49 is -11.9% from the 52-week high of $387.73 and -7.5% over the past 30 days, placing the purchase in a near-term downtrend context. This cluster buy pattern during a pullback warrants attention as a potential signal of insider views on valuation, though the magnitude of Burns' position increase and the timing relative to recent price weakness merit further review.
