TSMC Announces Disclosure Regarding Subsidiary TSMC Global Ltd. Acquiring Fixed Income Securities

1. Securities Name: Corporate Bonds. 2. Transaction Date: 115/5/11 ~ 115/5/11 3. Date of Board Approval: Not applicable 4. Other Approval Date: Approval Level: Not applicable May 11, Republic of China Year 115 (2026) 5. Transaction Quantity, Unit Price, and Total Transaction Amount: 61748UAV4: 100,000 units; Unit price US$99.74; Total amount US$10.0 million. 6. Profit (or Loss) from Disposal (Not applicable for acquisition of securities): Not applicable 7. Relationship with the Company of the Transacting Party: None. 8. As of now, cumulative quantity, amount, shareholding ratio, and restrictions (e.g., pledge status) of this transaction's securities (including this transaction): 61748UAV4: 300,000 units; US$29.9 million; Shareholding Ratio: Not applicable; Restricted Status: None. 9. As of now, the ratio of investments in securities listed in Article 3 of the "Regulations Governing the Acquisition or Disposal of Assets by Publicly Issuing Companies" (including this transaction) to the total assets and the equity attributable to the parent company's owners in the most recent financial statements, and the amount of working capital in the most recent financial statements: 5.97%; 8.01%; NT$325,002 million. 10. Specific Purpose of Acquisition or Disposal: Fixed income investment. 11. Opinions of Dissenting Directors on this Transaction: Not applicable 12. Is this transaction a related party transaction? No 13. Counterparty to the Transaction and its Relationship with the Company: Not applicable 14. Date of Supervisor Approval or Audit Committee Consent: Not applicable 15. Date of previous announcement of significant news on the same event: Not applicable 16. Other descriptive matters: None