[Tung Ho Steel] Announcement of Fourth Term Sustainability Development Committee Members

1. Date of Change: 115/06/09 (2026/06/09) 2. Functional Committee Name: Sustainability Development Committee 3. Names of Former Members: (1) Hou Jie-Teng. (2) Liu De-Ming. (3) Liu Ji-Gang. 4. Brief Biographies of Former Members: (1) Hou Jie-Teng, Chairman of Tung Ho Steel Enterprise Co., Ltd. (2) Liu De-Ming, Independent Director of Tung Ho Steel Enterprise Co., Ltd. (3) Liu Ji-Gang, Independent Director of Tung Ho Steel Enterprise Co., Ltd. 5. Names of New Members: (1) Hou Jie-Teng. (2) Liu Ji-Gang. (3) Ke Wen-Ling 6. Brief Biographies of New Members: (1) Hou Jie-Teng, Chairman of Tung Ho Steel Enterprise Co., Ltd. (2) Liu Ji-Gang, Independent Director of Tung Ho Steel Enterprise Co., Ltd. (3) Ke Wen-Ling, Independent Director of Tung Ho Steel Enterprise Co., Ltd. 7. Change Details (Please enter 'Resignation', 'Dismissal', 'Term Expiration', 'Death', or 'New Appointment'): New Appointment 8. Reason for Change: Appointment of members to the Fourth Term Sustainability Development Committee by the Board of Directors. 9. Original Term (e.g., xx/xx/xx ~ xx/xx/xx): 112/06/19 - 115/05/22 (Corresponding to the term of the 25th Board of Directors of the Company) 10. Effective Date of New Appointment: 115/06/09 (2026/06/09) 11. Other Matters to be Noted: (1). The term of the Third Term Sustainability Development Committee runs from 112/06/19 until the expiration of the term of the 25th Board of Directors. (2). The term of the members of the Fourth Term Sustainability Development Committee begins on the date the Board of Directors resolves and approves this appointment and ends on May 21, 118 (2029/05/21) (corresponding to the term of the 26th Board of Directors of the Company). If the term of the Board of Directors is extended due to failure to elect successors upon expiration, the terms of the members of this Sustainability Development Committee will also be extended in line with the Board of Directors' extended term of office.