[Nichidenbo] Announcement on the Determination of Ex-Dividend Date and Related Matters by the Chairman

1. Date of Board or Shareholders' Meeting resolution or company decision: 2026/05/22 2. Type of Ex-Rights/Dividend: Ex-Dividend 3. Type and amount of cash dividend for common shares: Shareholders' cash dividend, total amount 1,380,322,320 TWD. 4. Ex-Dividend trading date: 2026/07/02 5. Last transfer date: 2026/07/04 6. Stop transfer start date: 2026/07/05 7. Stop transfer end date: 2026/07/09 8. Ex-Dividend record date: 2026/07/09 9. Bond last conversion application date: N/A 10. Bond conversion stop start date: N/A 11. Bond conversion stop end date: N/A 12. Common share cash dividend payment date: 2026/07/31 13. Other matters: (1) According to Article 21 of the company's Articles of Incorporation and the board resolution passed on March 2, 2026, the Chairman is authorized to determine the ex-dividend record date and payment date. (2) The Chairman determined the following on May 22, 2026: Shareholder dividend payout ratio: As of May 21, 2026, the number of outstanding shares is 287,567,150. Since this is the same as the date of the board resolution on March 2, no adjustment to the payout ratio is needed. The cash dividend is 4.8 TWD per share.