4763 Material*-KY Announces Change in Sustainability Committee Members

Release Date: June 27, 2026 Statement Date: June 26, 2026 Statement Time: 17:40:07 Company Code: 4763 Company Name: Material*-KY

Subject: Announcement of Change in Members of the Company's Sustainability Committee Applicable Clause: Item 6 Factual Date: June 26, 2026

Details: 1. Date of Change: June 26, 2026 2. Name of Functional Committee: Sustainability Committee 3. Former Members: Wang Kezhang, Lin Zezhong, Yu Jingxian, Chen Jierui, Wu Wenbin 4. Former Members' Background: Wang Kezhang: General Manager of the Company Lin Zezhong: Independent Director of the Company Yu Jingxian: Independent Director of the Company Chen Jierui: Corporate Governance Officer of the Company Wu Wenbin: Advisor of the Company 5. New Members: Wang Kezhang, Lin Yuyi, Zheng Shi-yi, Chen Jierui, Wu Wenbin 6. New Members' Background: Wang Kezhang: General Manager of the Company Lin Yuyi: Independent Director of the Company Zheng Shi-yi: Independent Director of the Company Chen Jierui: Corporate Governance Officer of the Company Wu Wenbin: Advisor of the Company 7. Nature of Change: Term Expiration 8. Reason for Change: Full Board Election 9. Previous Term: November 13, 2024 – May 30, 2026 10. Effective Date of New Appointment: June 26, 2026 – June 25, 2029 11. Other Matters to be Disclosed: None.