【CMC】Announcement of the Company's Acquisition of Securities

1. Security Name: Guang Sheng Common Stock 2. Transaction Date: 2026/3/23~2026/4/8 3. Board Resolution Date: Not applicable 4. Other Approval Dates: Approval Level: Chairman's approval April 8, 2026 5. Transaction Volume, Price per Unit, and Total Transaction Amount: Transaction Volume (thousand shares): 167 Price per Unit (NTD): 2,036.85 Total Transaction Amount (NTD): 340,154,675 6. Disposal Profit (or Loss) (Not applicable to acquirers of securities): Not applicable 7. Relationship with the Transacting Company: None 8. Cumulative Holdings of these Securities (including this transaction) to Date: Quantity, Amount, Shareholding Ratio, and Encumbrances (e.g., pledges): Remaining Holdings: 74,000 shares, Amount: NTD 151,322,718 Shareholding Ratio: 0.09%, Encumbrances: None 9. Cumulative Investment in Securities (including this transaction) as listed in Article 3 of the "Regulations Governing the Acquisition and Disposal of Assets by Public Companies" as a Percentage of the Company's Latest Financial Report's Total Assets and Equity Attributable to Owners of the Parent, and the Amount of Working Capital in the Latest Financial Report: Percentage of Total Assets: 73.16% Percentage of Equity Attributable to Owners of the Parent: 102.48% Working Capital Amount: NTD 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 Major Information Disclosure on the Same Event: Not applicable 16. Other Explanations: Authorization was granted on 2026/03/31 for authorized traders to conduct securities transactions in the centralized trading market during the second quarter of 2026.