Nan Ya PCB Invited to SinoPac Securities' 2026 Q2 Investment Forum

Pursuant to Article 4, Clause XX: 12 Date of Fact: 115/06/12

1. Date of the Corporate Presentation: 115/06/12 2. Time of the Corporate Presentation: 14:30 3. Venue of the Corporate Presentation: 2nd Floor, Le Méridien Taipei (No. 38, Songren Road, Xinyi District, Taipei City) 4. Summary of Presentation: Nan Ya PCB has been invited to attend SinoPac Securities' 2026 Second Quarter Investment Forum to present an overview of the company's business operations. 5. Other Disclosures: None

For complete financial and business information, please refer to the Corporate Presentation Schedule or the Earnings Call section on the Public Information Observation Station website.