2108 Nanya Plastics: Announcement of the Board's Election of Chairman for Important Subsidiary - Nanomet Technology Co., Ltd.

Announcement Date: May 16, 2026 Issuing Date: May 15, 2026 Issuing Time: 16:24:15 Company Code: 2108 Company Name: Nanya Plastics Subject: On behalf of important subsidiary - Nanomet Technology Co., Ltd., announcement of the Board of Directors' election of Chairman Applicable Clause: Article 6 Date of Occurrence: May 15, 2026 Explanation: 1. Date of board resolution or change: May 15, 2026 2. Personnel type (please enter Chairman or General Manager): Chairman 3. Name of former incumbent: Li Shun-Hsing 4. Brief resume of former incumbent: Chairman of Nanomet Technology Co., Ltd. 5. Name of new incumbent: Li Shun-Hsing 6. Brief resume of new incumbent: Chairman of Nanomet Technology Co., Ltd. 7. Type of change (please enter "resignation", "dismissal", "term expiration", "position adjustment", "severance", "retirement", "death", or "new appointment"): Term expiration 8. Reason for change: The Board of Directors' term expired and a complete re-election was held, with the new Board electing the Chairman. 9. Effective date of new appointment: May 15, 2026 10. Other matters that need to be specified (If the subject of the event or resolution is a public offering company or above, this material information simultaneously complies with Article 7, Paragraph 6 of the Enforcement Rules of the Securities and Exchange Act regarding matters that have a significant impact on shareholders' equity or securities prices): None