TSMC Board Approves Capital Increase for Subsidiary TSMC Arizona

1. Name and nature of the target (if it is preferred shares, the agreed issuance conditions such as dividend rate should also be specified): TSMC Arizona Corporation ("TSMC Arizona") 2. Date of occurrence: May 12, 2026 ~ May 12, 2026 3. Date of board approval: May 12, 2026 4. Other resolution dates: Not applicable 5. Transaction quantity, unit price, and total transaction amount: Not exceeding US$20 billion 6. Counterparty to the transaction and its relationship with the company (if the counterparty is a natural person and not a related party of the company, their name may be omitted): TSMC Arizona; a subsidiary of the company. 7. If the counterparty is a related party, the reason for selecting the related party as the transaction object, the previous transferor, the relationship between the previous transferor, the company, and the counterparty, and the previous transfer date and amount should also be disclosed: Investment in subsidiary 8. If the owner of the transaction target has been a related party of the company within the past five years, the date and price of acquisition and disposal by the related party, and the relationship with the company at the time of the transaction should also be disclosed: Not applicable 9. Relevant matters for this disposal of receivables (including the type of collateral attached to the receivables, and if the receivables include those against related parties, the name of the related party and the book value of the receivables against that related party being disposed of this time): Not applicable 10. Disposal profit (or loss) (not applicable for acquisition of securities) (for deferred items, the recognition status should be listed and explained): Not applicable 11. Delivery or payment terms (including payment period and amount), contractual restrictions, and other important agreements: Phased capital increase; none 12. Method of determining this transaction, reference basis for price determination, and decision-making unit: Board resolution of the company 13. Net value per share of the acquired or disposed securities target company: NT$27,058.47 14. As of now, the quantity, amount, shareholding ratio, and restricted rights (e.g., pledged status) of accumulated holdings of these transaction securities (including this transaction): 44 million shares; US$44 billion; 100%; none 15. As of now, the proportion of investment in securities (including this transaction) listed in Article 3 of the "Regulations Governing the Acquisition and Disposal of Assets by Public Companies" to the total assets and owners' equity attributable to the parent company in the company's latest financial report, and the working capital amount in the latest financial report (Note 2): 46.89%; 57.91%; NT$325,002 million. 16. Broker and brokerage fees: Not applicable 17. Specific purpose or use of acquisition or disposal: Investment in subsidiary 18. Opinions of dissenting directors on this transaction: None. 19. This transaction is a related party transaction: Yes 20. Date of approval by supervisors or audit committee: May 11, 2026 21. Accountant's non-reasonableness opinion on this transaction: Not applicable 22. Name of accounting firm: Not applicable 23. Name of accountant: Not applicable 24. Accountant's practicing certificate number: Not applicable 25. Does it involve changes in operating model: No 26. Explanation of changes in operating model: Not applicable 27. Transaction status with counterparty in the past year and expected next year: Not applicable 28. Source of funds: Not applicable 29. Date of previous significant announcement on the same event: Not applicable 30. Other matters to be specified: None.