[KOGA-KY] Announcement by subsidiaries Suzhou Jiaji/Kede/Jiacai/Aipulai/Baihong/Jiahung/Jiajun on accumulated disposal of the same marketable securities reaching 20% of paid-in capital within one year

1. Securities name: Shanghai Stock Exchange overnight national debt reverse repurchase GC001, Code 204001 2. Transaction date: 2026/5/6~2026/5/6 3. Date of board resolution: Not applicable 4. Other approval date: Approval level: Chairman approval May 6, 2026 (ROC calendar) 5. Transaction quantity, price per unit, and total transaction amount: Aipulai: 83,750 units, average price: 1.110%, Baihong: 108,980 units, average price: 1.110%, Jiacai: 595,140 units, average price: 1.110%, Jiahung: 145,960 units, average price: 1.100% Jiaji: 123,730 units, average price: 1.110% Kede: 360,620 units, average price: 1.110%, Jiajun: 340,410 units, average price: 1.110%, Total amount: RMB 175,864 thousand (approximately TWD 810,542 thousand) 6. Disposal gain (or loss) (not applicable for acquisition of marketable securities): Disposal gain RMB 5 thousand 7. Relationship with the transacted company: Non-related party 8. As of now, the accumulated quantity, amount, shareholding ratio, and restricted rights (e.g., pledge) of this security (including this transaction): Suzhou Aipulai None Suzhou Baihong None Suzhou Jiacai Electronics None Suzhou Jiahung Electronics None Suzhou Jiaji Electronics None Suzhou Kede None Chongqing Jiajun None Pledge status: None 9. As of now, based on Article 3 of the "Regulations Governing the Acquisition and Disposal of Assets by Public Companies," the proportion of investment in marketable securities (including this transaction) to the company's most recent financial report's total assets and owners' equity attributable to the parent company, and the amount of working capital in the most recent financial report: Proportion to total assets: 17.15% Proportion to shareholders' equity: 22.77% Working capital: TWD 2,515,979 thousand 10. Specific purpose of acquisition or disposal: Financial investment management 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 material information disclosure for the same event: Not applicable 16. Other matters to be specified: None Keywords: Material Information