Aurora Corp. Announces Ex-Dividend Record Date

1. Date of resolution by the board of directors, shareholders' meeting, or company decision: 2026/06/17 2. Type of ex-rights/dividend: Ex-dividend 3. Type and amount of common stock dividend: Cash dividend of NT$873,949,317 (NT$3.7 per share) 4. Ex-dividend trading date: 2026/07/06 5. Last transfer date: 2026/07/07 6. Book closure start date: 2026/07/08 7. Book closure end date: 2026/07/12 8. Ex-dividend record date: 2026/07/12 9. Last date for bond conversion application: Not applicable 10. Bond conversion suspension start date: Not applicable 11. Bond conversion suspension end date: Not applicable 12. Common stock cash dividend payment date: 2026/07/24 13. Other remarks: Cash dividend is calculated to the NT dollar, with amounts below one dollar rounded down.