Ko-Chia KY Announces Subsidiaries' Cumulative Acquisition of Same Securities Reaching 20% of Paid-in Capital

Announcement Date: July 22, 2026 Statement Date: July 21, 2026 Statement Time: 16:56:40 Company Code: 5215 Company Name: Ko-Chia KY Subject: Announcement on Subsidiaries Suzhou Jiagi, Kede, Jiaca, Aipulai, Baihong, Jiahuang, and Jiajun Cumulatively Acquiring the Same Securities Exceeding 20% of Paid-in Capital Within One Year Applicable Clause: Item 20 Factual Date: July 21, 2026

Details: 1. Security Name: 1-day Chinese Treasury Reverse Repo (GC001), Code 204001, Shanghai Stock Exchange

2. Transaction Date: July 21, 2026 ~ July 21, 2026

3. Board Approval Date: Not applicable

4. Other Approval Dates: Approval Level: Approved by Chairman July 21, 2026 (Minguo Year 115)

5. Transaction Quantity, Unit Price, and Total Amount: Aipulai: 83,990 units, average rate: 1.435% Baihong: 102,660 units, average rate: 1.435% Jiaca: 410,430 units, average rate: 1.435% Jiahuang: 210,050 units, average rate: 1.440% Jiagi: 120,110 units, average rate: 1.440% Kede: 207,350 units, average rate: 1.445% Jiajun: 381,160 units, average rate: 1.435% Total Amount: NT$151,575 thousand (approximately NT$709,252 thousand)

6. Gain (or Loss) on Disposal (Not applicable for acquisition of securities): Not applicable

7. Relationship with the Counterparty: Unrelated party

8. Cumulative Holdings (including this transaction) to Date: Aipulai: 83,990 units, average rate: 1.435% Baihong: 102,660 units, average rate: 1.435% Jiaca: 410,430 units, average rate: 1.435% Jiahuang: 210,050 units, average rate: 1.440% Jiagi: 120,110 units, average rate: 1.440% Kede: 207,350 units, average rate: 1.445% Jiajun: 381,160 units, average rate: 1.435% Pledge Status: None

9. Ratio of Cumulative Securities Investment (including this transaction) under Article 3 of the 'Regulations on Acquisition or Disposal of Assets by Publicly Issued Companies' to Total Assets and Equity in the Latest Financial Statements, and Working Capital: Ratio to Total Assets: 14.25% Ratio to Equity: 19.85% Working Capital: NT$2,612,388 thousand

10. Specific Purpose of Acquisition or Disposal: Investment and financial management

11. Directors' Objections to This Transaction: None

12. Related-Party Transaction: No

13. Counterparty and Relationship with the Company: Not applicable

14. Date of Supervisor's Acknowledgment or Audit Committee's Approval: Not applicable

15. Previous Material Information Announcement Date for the Same Event: Not applicable

16. Other Remarks: None