6277 ATEN: Announcement of Change in Corporate Director Representative at Subsidiary ATEN Technology

Disclosure Date: 1150724 Statement Date: 1150723 Statement Time: 162043 Company Code: 6277 Company Name: ATEN Subject: Announcement of Change in Corporate Director Representative at Key Subsidiary ATEN Technology Applicable Clause: Clause 6 Event Date: 1150723 Details: 1. Date of Change: 115/07/23 2. Corporate Entity Name: Aten US Holdings Inc. 3. Former Representative Name: Ching-Wei Tien 4. Former Representative Background: Director, Aten Technology 5. New Representative Name: Chun-Chang Yu 6. New Representative Background: Senior Assistant Manager, General Management Office, ATEN Technology Corporation 7. Reason for Change: The former corporate director representative retired and stepped down; the corporate shareholder has appointed a new representative 8. Previous Term (e.g., xx/xx/xx to xx/xx/xx): March 31, 2026 to the date of next shareholders' meeting for director election 9. Effective Date of New Appointment: July 23, 2026 10. Additional Remarks: None