【Yingwei】Announcement of Board Resolution to Cancel and Retire Restricted Employee Stock for Capital Reduction

1. Date of Board Resolution: 2026/05/04 2. Reason for Capital Reduction: Due to employees who were originally granted restricted employee stock not meeting the vesting conditions, the restricted employee stock will be recovered and cancelled for capital reduction. 3. Amount of Capital Reduction: NT$36,000 4. Shares to be Cancelled: 3,600 shares 5. Capital Reduction Ratio: 0.0010% 6. Capital after Reduction: NT$360,380,420 7. Scheduled Date of Shareholder Meeting: Not applicable 8. Number of listed common shares after capital reduction and new share listing: 36,038,042 shares 9. Ratio of listed common shares after capital reduction and new share listing to total issued common shares (listed common shares after capital reduction / total issued common shares after capital reduction): Not applicable 10. For cases where the number of listed common shares after capital reduction mentioned in items 8 and 9 does not reach 60 million shares and does not account for 25% of total shares, please explain the measures to address low stock liquidity: Not applicable 11. Capital Reduction Record Date: 2026/05/04 12. Other matters to be specified: None