Tung-Yen Announces Expiration of Sustainability Committee Members' Term

Release Date: June 19, 2026 Statement Date: June 18, 2026 Statement Time: 14:40:42 Company Code: 1110 Company Name: Tung-Yen Subject: Announcement Regarding Expiration of Term for Members of the Company's Sustainability Committee Applicable Clause: Clause 6 Factual Date: June 18, 2026

1. Date of Change: June 18, 2026 2. Name of Functional Committee: Sustainability Committee 3. Former Members' Names: Chen Guan-Hua (Director) Yang Wen-Zai (Independent Director) Ye Jin-Bao (Independent Director) 4. Former Members' Resumes: Chen Guan-Hua (Director): Vice Chairman, Southeast Cement Co., Ltd. Yang Wen-Zai (Independent Director): Independent Director, Connwin Environmental Co., Ltd. Ye Jin-Bao (Independent Director): Prosecutor, Supreme Prosecutors Office 5. New Members' Names: Not yet appointed 6. New Members' Resumes: Not yet appointed 7. Nature of Change (please enter 'resignation', 'dismissal', 'end of term', 'death', or 'new appointment'): End of term 8. Reason for Change: The company's board of directors underwent a full renewal on June 18, 2026. 9. Original Term (e.g., 05/10/2024 ~ 06/20/2026): May 10, 2024 ~ June 20, 2026 10. Effective Date of New Appointment: Not applicable 11. Other Matters to be Clarified: A board meeting will be convened in accordance with the law to elect new members of the Sustainability Committee. A subsequent major information announcement will be issued upon completion.