Subject: To announce the adjustment of cash dividend payout ratio

Subject:To announce the adjustment of cash dividend payout ratio
To which item it meets–article 4 paragraph xx:14
Date of events:2026/03/20
Contents:
1.Date of the resolution of the board of directors or
shareholders meeting:2026/03/20
2.Type and monetary amount of original dividend distribution:
Cash dividend NT$163,973,300(NT$2.55 per share)
3.Type and monetary amount of dividend distribution after the change:
Cash dividend NT$163,973,300(NT$2.54755161 per share)
4.Reason for the change:
The number of shares qualifies to the allotment changed due to the exercise of the employee stock option, the cash dividend payout ratio is adjusted accordingly.
5.Any other matters that need to be specified: None.