【TSMC】Announcement by the Company on behalf of its Subsidiary TSMC Global Ltd. Regarding the Acquisition of Fixed Income Securities

1. Name of securities: Corporate bonds, government agency mortgage-backed securities. 2. Transaction date: 2025/11/6~2026/4/28 3. Date of board of directors' resolution: Not applicable 4. Other approval dates: Approval level: Not applicable April 28, 2026 5. Quantity of transaction units, unit price, and total transaction amount: 95000U2S1: 250,000 units; unit price US$97.92; total amount US$24.5 million. 3132DWHG1: 124,983 units; unit price US$101.44; total amount US$12.7 million. 38385F6Z9: 102,643 units; unit price US$100.41; total amount US$10.3 million. 38141GC77: 100,000 units; unit price US$100.54; total amount US$10.1 million. 38141GZU1: 100,000 units; unit price US$100.14; total amount US$10.0 million. 38141GWL4: 100,000 units; unit price US$99.28; total amount US$9.9 million. 6. Disposal profit (or loss) (Not applicable for acquisition of marketable securities): Not applicable 7. Relationship with the transaction target company: None. 8. As of now, the quantity, amount, shareholding ratio, and restrictions (e.g., pledge status) of accumulated holdings of these transaction securities (including this transaction): 95000U2S1: 1,305,000 units; US$127.8 million; shareholding ratio: Not applicable; restrictions: None. 3132DWHG1: 123,649 units; US$12.5 million; shareholding ratio: Not applicable; restrictions: None. 38385F6Z9: 102,643 units; US$10.3 million; shareholding ratio: Not applicable; restrictions: None. 38141GC77: 2,040,000 units; US$205.4 million; shareholding ratio: Not applicable; restrictions: None. 38141GZU1: 1,131,250 units; US$113.3 million; shareholding ratio: Not applicable; restrictions: None. 38141GWL4: 1,330,000 units; US$132.1 million; shareholding ratio: Not applicable; restrictions: None. 9. As of now, the proportion of investment in marketable securities listed in Article 3 of the "Regulations Governing the Acquisition and Disposal of Assets by Public Companies" (including this transaction) to the company's total assets and equity attributable to owners of the parent in the latest financial report, and the working capital amount in the latest financial report: 6.09%; 8.17%; NT$325,002 million. 10. Specific purpose of acquisition or disposition: Fixed income investment. 11. Opinions of dissenting directors on this transaction: Not applicable 12. Is this transaction a related party transaction: No 13. Counterparty and its relationship with the company: Not applicable 14. Date of approval by supervisors or audit committee: Not applicable 15. Date of previous significant announcement regarding the same event: Not applicable 16. Other matters to be specified: None