【KEC-KY】Announcement by subsidiaries Suzhou KEC/KODE/JIA CAI/APPLY/BAI HONG/JIA HUANG/JIA JUN regarding cumulative disposal of the same marketable securities exceeding 20% of paid-in capital within one year

1. Securities name: Shanghai Stock Exchange one-day national debt reverse repurchase GC001, code 204001 2. Transaction date: 2026/4/8~2026/4/8 3. Date of board of directors' approval: Not applicable 4. Other approval dates: Approval level: Chairman's approval April 8, 2026 5. Transaction quantity, price per unit, and total transaction amount: APPLY: 55,390 units, average price: 1.400%, BAI HONG: 112,880 units, average price: 1.400%, JIA CAI: 1,124,240 units, average price: 1.401%, JIA HUANG: 169,800 units, average price: 1.400% KEC: 122,610 units, average price: 1.400% KODE: 446,190 units, average price: 1.395%, JIA JUN: 341,980 units, average price: 1.405%, Total amount: RMB 237,318 thousand (approximately NT$1,129,005 thousand) 6. Disposal gain (or loss) (not applicable for acquisition of marketable securities): Disposal gain RMB 9 thousand 7. Relationship with the target company of the transaction: Non-related party 8. As of now, the cumulative quantity, amount, shareholding ratio, and restrictions on rights (such as pledge status) of this transaction security (including this transaction): Suzhou APPLY: None Suzhou BAI HONG: None Suzhou JIA CAI Electronics: None Suzhou JIA HUANG Electronics: None Suzhou KEC Electronics: None Suzhou KODE: None Chongqing JIA JUN: None Pledge status: None 9. As of now, the proportion of marketable securities investment (including this transaction) listed in Article 3 of the "Regulations Governing the Acquisition or Disposal of Assets by Public Companies" to the total assets and equity attributable to owners of the parent company in the company's most recent financial report, and the amount of working capital in the most recent financial report: Proportion to total assets: 23.89% Proportion to shareholders' equity: 31.72% Working capital: NT$2,515,979 thousand 10. Specific purpose of acquisition or disposal: Investment and financial management 11. Opinions of dissenting directors on this transaction: None 12. This transaction is a related party transaction: No 13. Counterparty of the transaction and its relationship with the company: Not applicable 14. Date of supervisors' approval or audit committee's consent: Not applicable 15. Date of previous material information announcement for the same event: Not applicable 16. Other explanatory matters: None