[Wiwynn] (Supplementary Announcement) Board Resolution to Build Headquarters in the Tanmei Section, Neihu District, Taipei - Signing of M&E Engineering Contract

1. Date of original announcement: 2025/08/08 2. Brief description of the original announcement: The Board of Directors resolved on August 8, 2025, to build a headquarters building via a land-lease and commission-build model, with a budget not exceeding NTD 4,000,000 thousand. 3. Reason for change and main content: The company has now signed a mechanical and electrical engineering contract with a non-related party, Taiwan Power Engineering Co., Ltd., for a total amount of NTD 980,000 thousand (tax included). 4. Impact on the company's finance and business after the change: None. 5. Other matters to be specified: None.