UMC Announces Adjustment to Cash Dividend Payout Rate

1. Date of Board or Shareholders' Meeting Resolution: NA

2. Original Dividend Type and Amount: Cash dividend of NT$32,704,164,009 for common shares, with a payout of NT$2.60 per share.

3. Revised Dividend Type and Amount: Cash dividend remains at NT$32,704,164,009 for common shares, with the per-share payout adjusted to NT$2.60808262.

4. Reason for Change: Due to the company's repurchase of its own shares and the reclamation of restricted stock awards granted to employees, the number of outstanding common shares and the shareholder dividend payout rate have changed.

5. Other Matters to be Disclosed: According to the resolution passed at the board meeting on June 3, 115, the Chairman has been authorized to adjust the per-share cash dividend amount.