【Koja-KY】On Behalf of Subsidiaries Suzhou Jiaji / Kede / Jiacai / Aipulai / Baihong / Jiahuang / Jiajun, Announcement of Cumulative Acquisition of the Same Security Exceeding 20% of Paid-in Capital Within One Year

1. Security Name: Shanghai Stock Exchange 1-day reverse repurchase agreement GC001, code 204001 2. Transaction Date: 115/5/6~115/5/6 (ROC calendar, i.e., 2026/5/6) 3. Date of Board of Directors' Resolution: Not applicable 4. Other Approval Dates: Approval Level: Chairman's approval May 6, 115 (ROC calendar, i.e., 2026) 5. Transaction Volume, Unit Price, and Total Transaction Amount: Aipulai: 83,760 units, average price: 1.370%, Baihong: 108,990 units, average price: 1.375%, Jiacai: 595,150 units, average price: 1.400%, Jiahuang: 145,970 units, average price: 1.390% Jiaji: 123,730 units, average price: 1.400% Kede: 360,630 units, average price: 1.400%, Jiajun: 341,420 units, average price: 1.385%, Total amount: NT$175,965 thousand (approximately NT$811,006 thousand) 6. Gain (or Loss) on Disposal (Not applicable for acquisition of securities): Not applicable 7. Relationship with the Counterparty: Non-related party 8. Cumulative Holding of This Transacted Security (Including This Transaction) as of Current Date, Including Quantity, Amount, Shareholding Ratio, and Restricted Rights (e.g., pledge status): Aipulai: 83,760 units, average price: 1.370%, Baihong: 108,990 units, average price: 1.375%, Jiacai: 595,150 units, average price: 1.400%, Jiahuang: 145,970 units, average price: 1.390% Jiaji: 123,730 units, average price: 1.400% Kede: 360,630 units, average price: 1.400%, Jiajun: 341,420 units, average price: 1.385%, Pledge status: None 9. As of the current date, the proportion of investment in securities (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 company in the most recent financial report, and the amount of working capital in the most recent financial report: Proportion of total assets: 17.17% Proportion of shareholders' equity: 22.79% Working capital: NT$2,515,979 thousand 10. Specific purpose of the acquisition or disposal: Financial investment 11. Opinions of dissenting directors for this transaction: None 12. Is this 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 material information release regarding the same event: Not applicable 16. Other matters to be specified: None Keywords: Material Information