ASE Technology Holding Announces Ex-Dividend Date and Payment Date

1. Date of board resolution, shareholders' meeting or company decision: 2026/06/08 2. Type of ex-rights/ex-dividend (please fill in "ex-rights", "ex-dividend" or "ex-rights and dividend"): ex-dividend 3. Type and amount of common stock dividend distribution: Common stock cash dividend NT$29,437,997,041 4. Ex-dividend trading date: 2026/07/03 5. Last day for share transfer registration: 2026/07/06 6. Book closure start date: 2026/07/07 7. Book closure end date: 2026/07/11 8. Ex-dividend record date: 2026/07/11 9. Last date for bond conversion application: N/A 10. Bond conversion suspension start date: N/A 11. Bond conversion suspension end date: N/A 12. Common stock cash dividend payment date: 2026/07/31 13. Other matters to be stated: N/A