1.Date of the resolution by the board of directors or shareholders’ meeting, or of the decision by the company:2025/06/19

2.Type (ex-rights or ex-dividend) (please write ”Ex-rights”, ”Ex-dividend”, or ”Ex-rights and dividend”):Ex-dividend

3.Type and monetary amount of dividend distribution:

Common share cash dividend:NT$544,056,995(NT$3.6 per Common share)

Preferred share A cash dividend:NT$744,801(NT$2.7075 per Preferred share A)

4.Ex-rights (Ex-dividend) date:2025/07/29

5.Last date before book closure:2025/07/30

6.Book closure starting date:2025/07/31

7.Book closure ending date:2025/08/04

8.Ex-rights (Ex-dividend) record date:2025/08/04

9.Deadline for applying the conversion of the debt voucher:NA

10.The closure period for the conversion of the debt voucher will start from the date:NA

11.The closure period for the conversion of the debt voucher will end on the date:NA

12.Payment date of cash dividend distribution:2025/08/21

13.Any other matters that need to be specified:

(1)The chairman is authorized to make the adjustment and handle relevant amendment matters.

(2)The closed period for preferred share A are from 2025/07/09 to 2025/08/04.The last conversion date is on 2025/07/07