SEQ_NO

1

Date of

announcement

2026/06/10

Time of

announcement

15:07:40

Subject

Announcement of the record date for cash dividend distribution

Date of events

2026/06/10

To which item it meets

paragraph 14

Statement

1.Date of the resolution by the board of directors or shareholders meeting

or decision by the Company:2026/06/10

2.Type of ex-rights or ex-dividend (please enter: “Ex-rights”,

”Ex-dividend”, or ”Ex-rights and dividend”):Ex-dividend

3.Type and monetary amount of common stock dividend distribution:

Cash dividends NT$2.5 per share, totaling NT$790,200,158.

4.Ex-rights (ex-dividend) trading date:2026/07/02

5.Last date before book closure:2026/07/03

6.Book closure starting date:2026/07/04

7.Book closure ending date:2026/07/08

8.Ex-rights (ex-dividend) record date:2026/07/08

9.Deadline for applying the conversion of the bond:N/A

10.The closure period for the conversion of the bond will

start from the date:N/A

11.The closure period for the conversion of the bond will

end on the date:N/A

12.Payment date of common stock cash dividend distribution:2026/07/31

13.Any other matters that need to be specified:None