Announcement Regarding Acquisition of Fixed-Income Securities by TSMC Subsidiary, TSMC Global Ltd.

Announcement Date: May 20, 2026 Announcement Time: 18:26:21 Company Code: 2330 Company Name: TSMC Subject: Announcement regarding the acquisition of fixed-income securities by our subsidiary, TSMC Global Ltd. Relevant Clause: Clause 20 Date of Occurrence: May 20, 2026

Explanation: 1. Name of Securities: Corporate Bonds 2. Date of Transaction: May 20, 2026 3. Date of Board Approval: N/A 4. Date of Other Approvals: N/A 5. Quantity, Unit Price, and Total Amount: - 172967PZ8: 300,000 units; Unit price 100.11 USD; Total 30.0 million USD - 46647PEE2: 200,000 units; Unit price 100.99 USD; Total 20.2 million USD - 95000U3L5: 100,000 units; Unit price 101.08 USD; Total 10.1 million USD - 61690U8B9: 100,000 units; Unit price 100.99 USD; Total 10.1 million USD - 172967LS8: 100,000 units; Unit price 98.67 USD; Total 9.9 million USD 6. Disposal Gain (or Loss): N/A 7. Relationship with Target Company: None 8. Cumulative holdings to date: Specifics available for each bond series. 9. Ratio to Total Assets and Equity attributable to parent company owners: 6.01%; 7.43%; Working Capital: 325,002 million NTD 10. Purpose of Acquisition: Fixed-income investment. 11. Directors' Dissent: N/A 12. Related Party Transaction: No 13. Counterparty Relationship: N/A 14. Audit Committee Approval Date: N/A 15. Date of previous announcement of the same matter: N/A 16. Other notes: None