Central: Announcement of the Company's Disposal of Securities

1. Securities Name: Sunonwealth Electric Machine Industry Co., Ltd. Ordinary Shares 2. Transaction Date: 2026/3/26~2026/4/16 3. Board of Directors Approval Date: Not applicable 4. Other Approval Date: Approval Level: Chairman's approval, April 16, 2026 5. Transaction Quantity, Price per Unit, and Total Transaction Amount: Quantity (thousand shares): 960, Price per unit (NTD): 357.47, Total transaction amount (NTD): 343,175,499 6. Disposal Profit (or Loss) (Not applicable to acquisition of securities): Disposal profit NT$14,192,035 7. Relationship with the Transacted Company: None 8. As of now, accumulated holding of these securities (including this transaction): Quantity: 671,000 shares, Amount: NT$238,452,373, Shareholding Ratio: 0.43%, Restrictions on Rights: None 9. As of now, investment in securities (including this transaction) listed in Article 3 of the 'Regulations Governing the Acquisition or Disposal of Assets by Public Companies' as a percentage of the company's most recent financial report's total assets and equity attributable to owners of parent, and the amount of working capital in the most recent financial report: Percentage of total assets: 76.57%, Percentage of equity attributable to owners of parent: 107.24%, Working capital: NT$8,285,327 thousand 10. Specific Purpose of Acquisition or Disposal: Investment portfolio 11. Opinions of dissenting directors on this transaction: None 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 explanatory matters: Authorized persons were granted authority on March 31, 2026, to conduct securities transactions in the centralized trading market during the second quarter of 2026.