Taiwan Mask Corporation announced change of accounting officer, the details are as follows: Name, title, and resume of the previous position holder: YU,SHU-WEI/accounting officer/TMC accounting department manager. Name, title, and resume of the new position holder: FAN,YU-MING/accounting officer/TMC accounting department manager. Reason for the change: position adjustment.

Effective date: May 7, 2024.