[Mosis International] Announcement of Board Resolution to Cancel and Retire Restricted Employee Stock Options, Leading to Capital Reduction

1. Board resolution date: 115/04/30 2. Reason for capital reduction: Due to employees who were granted restricted employee stock options not meeting the vesting conditions, the restricted employee stock options will be recovered and cancelled. 3. Capital reduction amount: NT$500,000 4. Shares to be cancelled: 50,000 shares 5. Capital reduction ratio: 0.032% 6. Post-reduction capital: NT$1,574,747,440 7. Scheduled shareholder meeting date: Not applicable 8. Estimated number of common shares to be listed after capital reduction: 157,474,744 shares 9. Proportion of estimated listed common shares after capital reduction to issued common shares (post-reduction listed common shares / post-reduction issued common shares): Not applicable 10. If the estimated listed common shares after capital reduction in the preceding two items are less than 60 million shares and less than 25%, please explain the measures to address low liquidity: Not applicable 11. Capital reduction effective date: 115/04/30 12. Other matters to be noted: None