[Koja-KY] Announcement on behalf of subsidiaries regarding the cumulative disposal of the same securities reaching 20% of paid-in capital within one year

1. Name of securities: Shanghai Stock Exchange 1-day national bond reverse repo GC001, Code 204001 2. Trading date: 2026/05/15 ~ 2026/05/15 3. Date of board of directors approval: Not applicable 4. Other approval dates: Approval level: Chairman of the Board. May 15, 2026 5. Transaction volume, unit price, and total transaction amount: Aprai: 83,780 units, avg. price: 1.275% Baihong: 107,010 units, avg. price: 1.290% Jiacai: 505,290 units, avg. price: 1.290% Jiahuang: 231,000 units, avg. price: 1.303% Jiaji: 118,610 units, avg. price: 1.290% Kede: 345,720 units, avg. price: 1.290% Jiajun: 303,800 units, avg. price: 1.290% Total amount: RMB 169,539 thousand (approx. NT$781,389 thousand) 6. Profit (or loss) from disposal: Disposal profit of RMB 18 thousand 7. Relationship with the underlying company: Non-related party 8. Cumulative holding of this security (including this transaction), amount, shareholding ratio, and restrictions on rights: None for all subsidiaries. Restriction: None. 9. Ratio of total securities investment (including this transaction) to total assets and equity, and operating capital: Ratio to total assets: 15.70%. Ratio to shareholder's equity: 21.87%. Operating capital: NT$2,612,388 thousand. 10. Concrete purpose of acquisition or disposal: Investment and financial management 11. Opinions of dissenting directors: None 12. Is this a related party transaction: No 13. Counterparty and its relationship with the Company: Not applicable 14. Date of supervisor or audit committee approval: Not applicable 15. Date of previous announcement: Not applicable 16. Other matters: None