[TSMC] Announcement by TSMC Partners Ltd., a subsidiary of the Company, regarding the disposal of Arm Holdings plc shares

1. Securities name: Shares of Arm Holdings plc ("ARM") 2. Transaction date: 2026/4/28~2026/4/29 3. Date of board of directors' resolution: Not applicable 4. Other approval dates: Approval level: Handled in accordance with the company's approval authority. April 25, 2026 5. Transaction quantity, unit price, and total transaction amount: 1,110,784 shares; US$207.65; US$231 million 6. Disposal gain (or loss) (not applicable to those acquiring securities): Impact on retained earnings: US$174 million 7. Relationship with the transacting company: None 8. As of now, the cumulative number, amount, shareholding ratio, and restricted rights (e.as in pledge) of this transacted security (including this transaction): None 9. As of now, the ratio 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 equity attributable to owners of the parent company in the most recent financial report, and the amount of working capital in the most recent financial report: 0.58%; 0.78%; NT$325,002 million. 10. Specific purpose of acquisition or disposal: Disposal of equity investment 11. Opinions of dissenting directors on this transaction: Not applicable 12. This transaction is 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 on the same matter: Not applicable 16. Other matters to be specified: None