1304 Taiwan Polymers: Announcement of Director Change at Subsidiary Hsu-Teng Investment

Announcement Date: July 23, 2026 Statement Date: July 22, 2026 Statement Time: 17:16:49 Company Code: 1304 Company Name: Taiwan Polymers Subject: Announcement of Director Change at Key Subsidiary Hsu-Teng Investment Co., Ltd. Applicable Clause: Clause 6 Factual Date: July 22, 2026

Details: 1. Date of Change: July 22, 2026 2. Category of Appointed or Changed Personnel (Legal Person Director, Legal Person Supervisor, Independent Director, Natural Person Director, or Natural Person Supervisor): Natural Person Director 3. Former Position and Name: Director Miao Feng-Sheng 4. Former Director's Resume: Vice Chairman of United Enterprises Holdings Co., Ltd., Honorary Chairman of United Linde Gas Industries Co., Ltd. 5. New Director's Position and Name: Director Lin Hsin-Hung 6. New Director's Resume: General Manager of United Enterprises Holdings Co., Ltd. 7. Nature of Change (Please enter 'Resignation', 'Removal', 'End of Term', 'Deceased', or 'New Appointment'): Resignation 8. Reason for Change: Resignation 9. Number of Shares Held by New Director at Time of Appointment: 0 10. Original Term (e.g., xx/xx/xx ~ xx/xx/xx): Not Applicable 11. Effective Date of New Appointment: July 22, 2026 12. Director Turnover Rate During Same Term: Not Applicable 13. Independent Director Turnover Rate During Same Term: Not Applicable 14. Supervisor Turnover Rate During Same Term: Not Applicable 15. Is the Change Involving One-Third or More of Directors? (Yes or No): No 16. Other Matters to be Clarified: This significant information, concerning a publicly issued company or above, simultaneously meets the criteria under Article 7, Clause 6 of the Enforcement Rules of the Securities and Exchange Act regarding matters significantly affecting shareholders' rights or securities prices. No additional matters to disclose.