[TSMC] Announcement on behalf of subsidiary TSMC Global Ltd. regarding the acquisition of fixed-income securities

1. Name of the security: Corporate bonds. 2. Trading date: 2026/5/11~2026/5/15 3. Date of board of directors resolution: Not applicable 4. Other approval date: Approval level: Not applicable May 15, 2026 5. Volume, unit price, and total monetary amount of the transaction: 61690U8B9: 300,000 units; Unit price US$101.08; Total US$30.3 million. 95000U2A0: 200,000 units; Unit price US$99.16; Total US$19.8 million. 95000U3L5: 190,000 units; Unit price US$101.13; Total US$19.2 million. 61747YFP5: 150,000 units; Unit price US$101.06; Total US$15.2 million. 95000U2V4: 130,000 units; Unit price US$99.26; Total US$12.9 million. 61748UAV4: 100,000 units; Unit price US$99.61; Total US$10.0 million. 172967LP4: 100,000 units; Unit price US$99.11; Total US$9.9 million. 172967LS8: 100,000 units; Unit price US$98.72; Total US$9.9 million. 6. Gain (or loss) from disposal (not applicable for acquisition of securities): Not applicable 7. Relationship with the underlying company of the trade: None. 8. Current cumulative volume, amount, and shareholding percentage of holdings of the security being traded (including the current trade), and status of any restriction of rights (e.g., pledges): [Various cumulative holdings listed, e.g., 61690U8B9: 1,052,500 units; US$106.4 million...] 9. Ratio of securities investment (including this transaction) to total assets and equity attributable to owners of the parent in the latest financial statements, and operating capital: 6.02%; 7.43%; NT$325,002 million. 10. Specific purpose of the acquisition or disposal: Fixed income investment. 11. Opinions of dissenting directors: Not applicable 12. Is it a related party transaction: No 13. Counterparty and its relationship: Not applicable 14. Date of supervisor approval or Audit Committee agreement: Not applicable 15. Date of previous material message for the same event: Not applicable 16. Other matters: None.