[Koja-KY] Announcement on behalf of subsidiaries Suzhou Jiaji/Kede/Jiacai/Aipulai/Baihong/Jiahuang/Jiajun regarding the accumulated acquisition of the same securities reaching 20% of paid-in capital within one year

1. Name of the security: Shanghai Stock Exchange 1-day government bond reverse repo GC001, code 204001 2. Date of transaction: 2026/4/17~2026/4/17 3. Date of Board of Directors' approval: Not applicable 4. Date of other approval: Level of approval: Chairman's approval April 17, 2026 5. Quantity of transaction, price per unit, and total transaction amount: Aipulai: 55,420 units, average price: 1.270% Baihong: 104,920 units, average price: 1.260% Jiacai: 1,154,740 units, average price: 1.264% Jiahuang: 163,880 units, average price: 1.225% Jiaji: 117,660 units, average price: 1.260% Kede: 456,390 units, average price: 1.269% Jiajun: 356,250 units, average price: 1.253% Total amount: RMB 240,926 thousand (approximately NT$ 1,146,169 thousand) 6. Disposal profit (or loss) (not applicable to the acquisition of securities): Non-related party 7. Relationship with the target company of the transaction: Non-related party 8. Cumulative number, amount, shareholding ratio, and restrictions on rights (e.g., pledges) of the traded securities held to date (including this transaction): Aipulai: 55,420 units, average price: 1.270% Baihong: 104,920 units, average price: 1.260% Jiacai: 1,154,740 units, average price: 1.264% Jiahuang: 163,880 units, average price: 1.225% Jiaji: 117,660 units, average price: 1.260% Kede: 456,390 units, average price: 1.269% Jiajun: 356,250 units, average price: 1.253% Pledge status: None 9. Ratio of the securities investment (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 in the most recent financial statements, and the working capital in the most recent financial statements to date: Ratio to total assets: 24.26% Ratio to shareholders' equity: 32.20% Working capital: NT$ 2,515,979 thousand 10. Specific purpose of acquisition or disposal: Financial investment 11. Opinions of dissenting directors regarding this transaction: None 12. Whether this transaction is a related-party transaction: No 13. Trading counterparty and its relationship with the Company: Not applicable 14. Date of acknowledgement by supervisors or approval by the Audit Committee: Not applicable 15. Date of previous major message announced for the same event: Not applicable 16. Other matters requiring statement: None