【UMC】Announcement of the Board of Directors' Resolution to Handle the Recall and Cancellation of Restricted Stock Units for Employees

1. Date of Board of Directors' resolution: 115/04/29 2. Reason for capital reduction: Due to employees who were originally granted restricted stock units not meeting the vesting conditions, the recalled restricted stock units will be cancelled and capital reduced. 3. Amount of capital reduction: NT$15,397,490 4. Shares to be cancelled: 1,539,749 shares 5. Capital reduction ratio: 0.0122% 6. Capital after reduction: NT$125,769,848,700 7. Scheduled date of shareholders' meeting: Not applicable 8. Estimated number of listed common shares after capital reduction: Not applicable 9. Estimated ratio of listed common shares to total issued common shares after capital reduction (listed common shares after reduction / total issued common shares after reduction): Not applicable 10. For the preceding two items, if the estimated number of listed common shares after capital reduction is less than 60 million shares and less than 25%, please explain the countermeasures for low equity liquidity: Not applicable 11. Effective date of capital reduction: 115/04/29 12. Other matters that need to be specified: None