Thirty-one Taiwan Semiconductor Manufacturing ($TSM) insiders spent a combined $432,511 on open-market purchases between June 5 and June 30, 2026, filing Form 4 disclosures across 36 individual transactions on five trading days.
The bulk of the activity landed on June 5, when all 31 insiders executed 32 transactions at $76.01 per share, together worth roughly $125,721. One insider, VP Tien Bor-Zen, filed two separate purchases that day. The group spanned the company's entire senior leadership structure. CEO Wei Che-Chia purchased 150 shares for $11,401.50; CFO Huang Jen-Chau purchased 30 shares for $2,280.30; Controller Chen Chih-Ho purchased 32 shares for $2,432.32. All four COOs, Chin Yung-Pei, Mii Yuh-Jier, Hou Yung-Chin, and Kevin Xiaoqiang Zhang, filed purchases ranging from $4,713 to $5,473. Twenty-four vice presidents rounded out the group, with individual trades generally falling between roughly $2,800 and $4,300.
Activity continued through the rest of the month. VP Yuan Lipen added 1,000 shares on June 15 at $75.26 ($75,260), then another 1,000 on June 22 at $79.19 ($79,190). VP Tien Bor-Zen made two additional purchases after his June 5 trades: 1,000 shares on June 29 at $76.64 ($76,640) and 1,000 shares on June 30 at $75.70 ($75,700), bringing his total for the cluster to four transactions. The June 30 filings were submitted the same day as the trades.
The June cluster follows a similar event on May 8, when 28 $TSM insiders collectively filed 29 purchases totaling approximately $115,630 at $71.82 per share. Several names appear in both events, including CFO Huang Jen-Chau and VPs Fang Shu-Hua, Hwang Yuan-Ko, Lin Chris Horng-Dar, Lu Lee-Chung, Tien Bor-Zen, and Wu Shien-Yang. The June 5 price of $76.01 per share represented a roughly 5.8 percent increase over the $71.82 paid on May 8.
The Form 4s covering the June 5 transactions were filed on June 9, four days after the trade date. The later individual purchases in the cluster were filed within one day of execution. Taken together, the 31-insider, 36-transaction event ranks among the broader coordinated purchase clusters on record for $TSM ADS filings.