Validated high-conviction buyer — this insider’s opportunistic purchases fall in a cohort whose buys have historically preceded above-benchmark moves. How we measure this ↗
TSM Chairman Che-Chia Wei buys 150 shares at $76.01; prior two same-ticker buys returned +478.1% and +611.4% in 30 days; cluster of 22 other insider buys in 14 days
Che-Chia Wei purchased 150 shares of TSM for $11,401.50 on 2026-06-05, expanding his holdings by +0.9% to 17,689 shares. His prior two open-market purchases at this ticker—on 2026-05-08 and 2026-04-09—both generated exceptionally strong 30-day returns of +478.1% and +611.4% respectively, with a 100% win rate across his 2 same-ticker prior trades. This current buy coincides with a 22-insider cluster pattern over the past 14 days, suggesting coordinated or reinforcing confidence in the stock. At the current price of $426.80, TSM is trading at -5.2% from its 52-week high and +3.7% over the last 30 days, providing context for the purchase timing relative to recent momentum and valuation.
TSM Chairman and CEO Wei Che-Chia purchases 160 shares; part of a 25-insider buying wave in 14 days.
Wei Che-Chia, TSM's Chairman and CEO, purchased shares on the open market while the stock trades near its 52-week high and has gained significantly over the past three months. This purchase is part of a substantial cluster: 25 insiders bought shares within a 14-day window, indicating broad insider activity across the company's leadership. Wei's own prior open-market purchase, made approximately one month earlier, saw the stock rise afterward—a pattern of well-timed buying. As a sitting CEO with direct knowledge of operations, his decision to add shares while the stock remains elevated is noteworthy, though the small transaction size relative to his overall holdings suggests modest conviction rather than a major capital commitment. The cluster of simultaneous buying across the organization provides context beyond this single trade.
TSM CEO Wei Che-Chia buys 186 shares at $57.87 amid cluster of 28 insiders buying in 14 days
Wei Che-Chia, TSM Chairman and CEO, purchased 186 shares at $57.87 on 2026-04-09 for a total value of $10,763.82, increasing holdings from 17,193 to 17,379 shares. This transaction occurs as part of a significant cluster pattern: 28 other insiders also bought within the past 14 days, suggesting broad-based insider confidence across the organization. The current stock price of $369.57 stands at -4.7% from the 52-week high of $387.73, placing the buy during a modest pullback after strong recent momentum (30-day change: +9.2%; 90-day change: +11.6%). The convergence of CEO-level buying with coordinated purchasing across 28 other insiders during a temporary price weakness warrants attention as a potential signal of management's assessment of value.
