[ASE Technology Holding] Announcement regarding ASE Semiconductor's Board of Directors resolution on ex-dividend date and payment date

1. Date of Board of Directors/Shareholders meeting resolution or company decision: 115/05/25 2. Type of ex-rights/dividend (please fill in "ex-rights", "ex-dividend", or "ex-rights and dividend"): ex-dividend 3. Type and amount of dividend distribution: The dividend distribution amounts to NT$17.5 billion, to be paid entirely in cash to the sole shareholder, ASE Technology Holding Co., Ltd. 4. Ex-rights (dividend) trading date: NA 5. Last transfer date: NA 6. Stop transfer start date: NA 7. Stop transfer end date: NA 8. Ex-rights (dividend) record date: 115/07/28 9. Other items to be stated: The payment date for this cash dividend is 115/07/29.