Unimicron Announces Adjustment to Cash Dividend Payout Ratio

1. Date of Board or Shareholders' Meeting Resolution: 2026/06/18

2. Original Dividend Type and Amount: Cash dividend of NT$3,151,062,394 for common shares, with a payout of NT$2.0 per share.

3. Revised Dividend Type and Amount: Cash dividend of NT$3,151,062,394 for common shares, with a revised payout of NT$1.98015311 per share.

4. Reason for Change: Due to the conversion of the company's convertible bonds into common shares, the number of outstanding shares has changed. Pursuant to the board resolution on 2026/06/08, the chairman has been authorized to adjust the cash dividend payout ratio accordingly.

5. Other Matters to be Disclosed: None.