【Zhonghuan】Announcement of Company's Acquisition of Securities

1. Securities Name: Huatong Common Stock 2. Transaction Date: 2026/4/27 ~ 2026/5/6 3. Board of Directors Approval Date: N/A 4. Other Approval Dates: Approval Level: Chairman's Approval May 6, 2026 5. Transaction Quantity, Price per Unit, and Total Transaction Amount: Transaction Quantity (thousand shares): 1,720 Price per Unit (NT$): 248.27 Total Transaction Amount (NT$): 427,024,519 6. Disposal Gain (or Loss) (Not applicable for acquisition of securities): Not applicable 7. Relationship with the Investee Company: None 8. Cumulative Quantity, Amount, Holding Ratio, and Restriction Status (e.g., pledge status) of Held Securities (including this transaction) to date: Balance Held: 2,459,000 shares, Amount: 610,792,190 NT$ Holding Ratio: 0.21%, Restriction Status: None 9. To date, the proportion of securities investments listed in Article 3 of the 'Regulations Governing the Acquisition or Disposal of Assets by Publicly Issued Companies' (including this transaction) to the total assets and the equity attributable to owners of the parent in the most recent financial statements, and the amount of working capital in the most recent financial statements: Proportion of Total Assets: 75.58% Proportion of Equity Attributable to Owners of the Parent: 105.87% Working Capital Amount: 8,285,327 thousand NT$ 10. Specific Purpose of Acquisition or Disposal: Investment portfolio 11. Dissenting Directors' Opinions on this Transaction: None 12. Is this transaction a related-party transaction? No 13. Counterparty to the transaction and its relationship with the company: Not applicable 14. Date of Supervisor's Approval or Audit Committee's Consent: Not applicable 15. Date of previous major information announcement on the same matter: Not applicable 16. Other descriptive matters: Authorized on 2026/03/31 for authorized traders to conduct securities transactions in the centralized trading market during the second quarter of 2026.