[En Chuan] Announcement of Cash Dividend Record Date and Payment Date

1. Date of Board of Directors or Shareholders' Meeting resolution: 2026/05/27 2. Type of ex-rights/ex-dividend: Ex-dividend 3. Type and amount of common stock dividend: Cash dividend from earnings: NT$473,730,051 4. Ex-dividend trading date: 2026/07/13 5. Last transfer date: 2026/07/14 6. Start date of suspension of transfer: 2026/07/15 7. End date of suspension of transfer: 2026/07/19 8. Ex-dividend record date: 2026/07/19 9. Last date for bond conversion application: Not applicable 10. Start date of suspension of bond conversion: Not applicable 11. End date of suspension of bond conversion: Not applicable 12. Common stock cash dividend payment date: 2026/08/07 13. Other matters to be stated: None