TSMC VP Tien Bor-Zen Acquires Shares via Employee Stock Purchase Plan

Executive Summary

On September 9, 2026, Taiwan Semiconductor Manufacturing Co. Ltd. (NYSE: TSM) filed a Form 4 disclosing purchases of Common Shares by Vice President Bor-Zen Tien on September 7, 2026. The reported transactions total 48 shares acquired through the company's Employee Stock Purchase Plan (ESPP) at an average translated price of $76.20 per share (NT$2,404.3453 translated at NT$31.552 per US$1).

Transaction Breakdown

• ESPP Trust Purchase: 43 Common Shares acquired at $76.20 per share, bringing indirect holdings via ESPP Trust to 313 shares.
• Immediate Family Member ESPP Purchase: 5 Common Shares acquired at $76.20 per share by an immediate family member who is also a TSMC employee, bringing their indirect holdings to 85 shares.
• Total Transaction Value: $3,657.60.

Ownership Overview

Following these transactions, Bor-Zen Tien holds:

• 14,051 Common Shares directly.
• 132 American Depositary Shares (ADS) directly (representing 660 Common Shares).
• 5,000 Common Shares indirectly via spouse.
• 313 Common Shares indirectly via ESPP Trust.
• 85 Common Shares indirectly via immediate family member.

Market Impact & Significance

This filing reflects routine, automated acquisitions executed under the company's employee stock purchase program rather than open-market discretionary trading. Given the small dollar value and programmatic nature of ESPP contributions, the trading significance is rated Low.