Winbond Announces Purchase of Manufacturing Equipment

Announcement Regarding Equipment Purchase

1. Name and Nature of Target: Operational manufacturing equipment. 2. Date of Occurrence: April 7, 2026 - May 21, 2026. 3. Date of Board Approval: May 5, 2026. 4. Total Transaction Amount: 1,811,637,230 TWD. 5. Transaction Counterpart: Lam Research International Sdn.Bhd (No relationship with the company). 6. Decision Method: Determined through bargaining and evaluation. 7. Purpose: For production use. 8. Other Information: This case was approved by the board of directors on February 10, 2026, and May 5, 2026.