Change of Legal Entity Director Representative for Subsidiary Po-Hsu Technology

Disclosure Date: July 11, 115 (2026) Statement Date: July 10, 115 (2026) Statement Time: 15:21:36 Company Code: 2349 Company Name: Ritek Corporation Subject: Announcement on the Change of Legal Entity Director Representative for Important Subsidiary Po-Hsu Technology Inc. Applicable Clause: Clause 6 Factual Date: July 10, 115 (2026)

Details: 1. Date of Change: July 10, 115 (2026) 2. Legal Entity Name: Ritek Corporation 3. Former Representative Name: Ching-Chung Lo 4. Former Representative Background: Representative, Po-Hsu Technology Inc. 5. New Representative Name: Ming-Hsien Chiang 6. New Representative Background: Deputy General Manager, Ritek Opto-Electronics Corp. 7. Reason for Change: Job reassignment 8. Previous Term (e.g., xx/xx/xx to xx/xx/xx): Not applicable 9. Effective Date of New Appointment: July 10, 115 (2026) 10. Other Matters to be Disclosed: None