【Taisun】Announcement of the Board of Directors' Resolution on Cash Dividend Distribution and Ex-dividend Record Date

1. Date of board meeting, shareholders' meeting resolution or company decision: 2026/05/08 2. Type of ex-rights or ex-dividend (please enter "ex-rights", "ex-dividend" or "ex-rights and ex-dividend"): Ex-dividend 3. Type and amount of common stock dividend: Cash dividend of NT$3 per share, totaling NT$2,657,301,666. 4. Ex-rights (ex-dividend) trading date: 2026/08/07 5. Last day for transfer registration: 2026/08/10 6. Start date for suspension of transfer registration: 2026/08/11 7. End date for suspension of transfer registration: 2026/08/15 8. Ex-rights (ex-dividend) record date: 2026/08/15 9. Last application date for bond conversion: Not applicable 10. Start date for suspension of bond conversion: Not applicable 11. End date for suspension of bond conversion: Not applicable 12. Common stock cash dividend payment date: 2026/09/11 13. Other matters that need to be specified: None.