Subject: Announce company sets for dividend day

Date of events:2026/06/05

Contents:

1.Date of the resolution by the board of directors or shareholders meeting or decision by the Company:2026/06/05

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 to common share holders NT$100,931,672,888(NT$7.2 per share)

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:2026/06/10

10.The closure period for the conversion of the bond will start from the date:2026/06/12

11.The closure period for the conversion of the bond will end on the date:2026/07/08

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

13.Any other matters that need to be specified:

(1)The company authorizes the Taiwan Depository and Clearing Corporation to distribute notifications for dividend payout electronically. Shareholders who wish to receive electronic notifications should register their emails on the eNotice platform listed on TDCC's website between July 2 2026. Anyone doing so after July 3 2026, will only begin to receive electronic messages for payouts starting next year.

(2)If the number of outstanding common shares increases due to the conversion of the Company's unsecured overseas convertible bonds into common shares, resulting in the need to adjust the dividend payout ratio, the adjusted dividend payout ratio will be announced separately on June 12, 2026