Thirty-one insiders at Taiwan Semiconductor Manufacturing Co. ($TSM) filed open-market purchase disclosures on June 5, 2026, all executing trades at $76.01 per share. It was the most concentrated single-day insider buying recorded for the chipmaker in recent filings, with those transactions alone accounting for approximately $125,721 of the cluster's total value.
The buying continued through the end of the month. Over the full 30-day window from June 5 through June 30, 31 distinct insiders collectively purchased $TSM shares across 36 separate transactions, combining for roughly $432,511. Four additional open-market purchases followed the June 5 wave: a trade on June 15 worth approximately $75,260, another on June 22 totaling $79,190, and two more on June 29 and June 30 valued at $76,640 and $75,700, respectively.
The top single-trade buyer by dollar value was Yuan Lipen, a Vice President at the company, whose June 22 purchase of 1,000 shares at $79.19 per share totaled $79,190. Tien Bor-Zen, another VP, purchased 1,000 shares on June 29 at $76.64 and an additional 1,000 shares on June 30 at $75.70. The June 5 group included CEO Wei Che-Chia, who acquired 150 shares, and two COOs — Mii Yuh-Jier and Chin Yung-Pei — who purchased 72 and 71 shares, respectively. Wei Che-Chia's filing arrived four days after the trade date.
The June 5 activity was notably larger than earlier group-buying episodes on the same ticker. On May 8, 2026, 28 insiders collectively purchased $TSM shares for a combined total of roughly $115,630. A similar 28-insider event occurred on April 9, 2026, totaling approximately $110,416. The June 5 cluster surpassed both in participating insiders and in aggregate single-day dollar value.
Taiwan Semiconductor, classified in the Semiconductors sector, carries a market capitalization of approximately $61.98 trillion in local currency terms as reported in company metadata. Its American Depositary Shares trade on the New York Stock Exchange under the ticker $TSM. The June cluster extends a pattern of recurring multi-insider purchase events that have appeared roughly every four to six weeks in the company's Form 4 filings this year.