Ko-Chia KY Announces New Endorsement Guarantee of NT$350 Million for Subsidiary

Release Date: July 15, 2026 Statement Date: July 14, 2026 Statement Time: 16:18:30 Company Code: 5215 Company Name: Ko-Chia KY Subject: Announcement pursuant to Article 25 of the 'Regulations on Lending, Endorsement, and Guarantee by Publicly Issued Companies' Applicable Clause: Clause 22 Factual Date: July 14, 2026

1. Factual Date: 07/14/2026

2. Endorsed and Guaranteed Party: (1) Company Name: Pai-Chieh Electronics Technology Co., Ltd. (2) Relationship with Guarantee Provider: Indirectly 100% owned Taiwanese subsidiary of the company (3) Endorsement and Guarantee Limit (in thousand NTD): 714,611 (4) Previous Endorsement and Guarantee Balance (in thousand NTD): 39,555 (5) Amount of New Endorsement and Guarantee (in thousand NTD): 35,000 (6) Endorsement and Guarantee Balance as of Factual Date (in thousand NTD): 74,555 (7) Actual Amount Drawn by Guaranteed Party (in thousand NTD): 0 (8) Reason for New Guarantee: To maintain financial flexibility for Pai-Chieh Electronics Technology Co., Ltd., a subsidiary of the company

3. Collateral Provided by the Guaranteed Company: (1) Description: None (2) Value (in thousand NTD): 0

4. Latest Financial Statement of the Guaranteed Company: (1) Capital (in thousand NTD): 94,800 (2) Accumulated Profits/Losses (in thousand NTD): 56,164

5. Conditions for Release of Guarantee Liability: (1) Condition: Upon maturity of the financing agreement (2) Date: Upon maturity of the financing agreement

6. Total Endorsement and Guarantee Limit (in thousand NTD): 1,429,222

7. Total Endorsement and Guarantee Balance as of Factual Date (in thousand NTD): 194,555

8. Ratio of Endorsement and Guarantee Balance Provided by the Company to the Net Assets in the Latest Financial Statement of the Publicly Issued Company: 5.44%

9. Combined Ratio of Endorsement and Guarantee, Long-Term Investment, and Fund Lending Balances to the Net Assets in the Latest Financial Statement: 7.65%

10. Other Matters to be Disclosed: The guarantor for this facility is the company itself, with a guarantee amount of NT$350 million, valid for a one-year period with a one-year drawdown window. Pai-Chieh Company will issue promissory notes endorsed by the company. No additional collateral conditions apply.