BES Engineering (2515) Announces Resignation of Chief Information Security Officer

Publication Date: May 20, 2026 Announcement Date: May 19, 2026 Announcement Time: 17:25:23 Company Code: 2515 Company Name: BES Engineering Subject: Announcement regarding the resignation of our Chief Information Security Officer Applicable Clause: Article 8 Date of Event: May 19, 2026

Explanation: 1. Personnel Change Category: Chief Information Security Officer 2. Date of Change: May 19, 2026 3. Name, Title, and Profile of Outgoing Officer: Chou Chih-Ming / Chairman / Director and General Manager of Ma-Qi Garden Leisure Comprehensive Amusement, Chairman of Bu Lao Song Recreation Enterprise Co., Ltd., Chairman of Tang Cheng Construction Co., Ltd., Director of reRUBBER (California, USA) 4. Name, Title, and Profile of Incoming Officer: Not Applicable 5. Circumstances of Change: Resignation 6. Reason for Change: Personal factors 7. Effective Date: May 19, 2026 8. Other Remarks: The resignation of the outgoing officer is effective from May 19, 2026. The new CISO will be announced following a board appointment.