5215 Ko-Chia KY

Disclosure Date: 2026-08-15 Statement Date: 2026-08-14 Statement Time: 15:45:52 Company Code: 5215 Company Name: Ko-Chia KY Subject: Announcement on subsidiaries Suzhou Jiaji, Kede, Jiacai, Aipulai, Baihong, Jiahuang, and Jiajun accumulating acquisitions of the same securities exceeding 20% of paid-in capital within one year Applicable Clause: Item 20 Factual Date: 2026-08-14 Details: 1. Security Name: 2-day Government Reverse Repo (GC002), Code 204002, Shanghai Stock Exchange 2. Transaction Date: 2026/08/14 ~ 2026/08/14 3. Board Approval Date: Not applicable 4. Other Approval Dates: Approval Level: Approved by Chairman Date: August 14, 2026 (Minguo Year 115) 5. Transaction Quantity, Unit Price, and Total Amount: Aipulai: 84,070 units, average rate: 1.000% Baihong: 92,750 units, average rate: 1.000% Jiacai: 505,320 units, average rate: 1.000% Jiahuang: 180,210 units, average rate: 1.000% Jiaji: 121,220 units, average rate: 1.000% Kede: 126,450 units, average rate: 1.000% Jiajun: 240,300 units, average rate: 1.000% Total Amount: NT$135,032 thousand (approximately NT$642,564 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 of the Security (including this transaction) to Date – Quantity, Amount, Ownership Ratio, and Rights Restrictions (e.g., Pledge Status): Aipulai: 84,070 units, average rate: 1.000% Baihong: 92,750 units, average rate: 1.000% Jiacai: 505,320 units, average rate: 1.000% Jiahuang: 180,210 units, average rate: 1.000% Jiaji: 121,220 units, average rate: 1.000% Kede: 126,450 units, average rate: 1.000% Jiajun: 240,300 units, average rate: 1.000% Pledge Status: None 9. Proportion of securities investments listed under Article 3 of the 'Asset Acquisition and Disposal Rules for Public Companies' (including this transaction) to total assets and equity attributable to owners of the parent in the latest financial statements, and operating capital amount: Ratio to Total Assets: 12.91% Ratio to Shareholders’ Equity: 17.98% Operating Capital: NT$2,612,388 thousand 10. Specific Purpose of Acquisition or Disposal: Investment and financial management 11. Dissenting Director Opinions on This Transaction: None 12. Is This Transaction a Related-Party Transaction: No 13. Counterparty and Its Relationship with the Company: Not applicable 14. Date of Supervisor Approval or Audit Committee Consent: Not applicable 15. Previous Material Information Disclosure Date on the Same Event: Not applicable 16. Other Disclosures: None