TSMC Announces Disposal of Vanguard International Semiconductor Corporation Shares (Supplement to 2026/05/15 Announcement)

1. Name of the security: Vanguard International Semiconductor Corporation common stock 2. Transaction date: 2026/5/18~2026/5/18 3. Date of board approval: N/A 4. Other approval date: Approval level: Chairman, May 15, 2026 5. Transaction quantity, price per unit, and total amount: 152,000,000 shares; NT$160.6; NT$24,411 million. 6. Gain (or loss) on disposal: NT$63,202 million (including the gain from re-measuring the remaining shares at fair value). 7. Relationship with the target company: An equity-method investee of the Company (before this disposal). 8. To date, cumulative holdings of this security (including this transaction): 354,709,324 shares; book value NT$56,399 million; 19.0% ownership; no restrictions on rights. 9. To date, the ratio of securities investment (including this transaction) to total assets and equity attributable to owners of the parent in the most recent financial statements, and working capital amount: 39.1%; 48.3%; NT$325,002 million. 10. Specific purpose of the acquisition or disposal: Disposal of equity investment. 11. Opinions of directors expressing dissent to this transaction: N/A 12. Whether this transaction is a related party transaction: No 13. Counterparty and its relationship with the company: N/A 14. Date of supervisor's acknowledgment or audit committee's consent: N/A 15. Date of previous material information release on the same event: May 15, 2026 16. Other remarks: None.