1.   Date of the resolution by the board of directors or shareholders meeting or decision
by the Company: 2025/07/02

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 dividend of
NT$173,203,224 (NT$1 per share)

4. Ex-rights (ex-dividend) trading date: 2025/07/17

5. Last date before book closure: 2025/07/20

6. Book closure starting date: 2025/07/21

7. Book closure ending date: 2025/07/25

8. Ex-rights (ex-dividend) record date: 2025/07/25

9. Deadline for applying the conversion of the bond: NA

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

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

12. Payment date of common stock cash dividend distribution: 2025/08/15

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