【ASE Technology Holding】Announcement by Subsidiary Universal Scientific Industrial (Shanghai) Co., Ltd. Regarding the Board of Directors' Re-election of Chairman and General Manager

1. Date of Board Resolution or Change: 2026/04/27 2. Personnel Type (Please enter Chairman or General Manager): Chairman and General Manager 3. Name of Former Occupant: Chairman: Chen Chang-Yi General Manager: Wei Zhen-Yan 4. Brief Resume of Former Occupant: Chen Chang-Yi: Chairman of Universal Scientific Industrial (Shanghai) Co., Ltd., Chairman of ASE Electronics Inc. Wei Zhen-Yan: General Manager of Universal Scientific Industrial (Shanghai) Co., Ltd., Director (Representative) of ASE Electronics Inc. 5. Name of New Occupant: Chairman: Chen Chang-Yi General Manager: Wei Zhen-Yan 6. Brief Resume of New Occupant: Chen Chang-Yi: Chairman of Universal Scientific Industrial (Shanghai) Co., Ltd., Chairman of ASE Electronics Inc. Wei Zhen-Yan: General Manager of Universal Scientific Industrial (Shanghai) Co., Ltd., Director (Representative) of ASE Electronics Inc. 7. Type of Change (Please enter "Resignation", "Removal", "Term Expiration", "Position Adjustment", "Layoff", "Retirement", "Death", or "New Appointment"): Term Expiration 8. Reason for Change: Term expiration, re-election 9. Effective Date of New Appointment: 2026/04/27 10. Other matters that need to be specified (If the subject of the event or resolution is a public company or above, this material information also complies with Article 7, Item 6 of the Enforcement Rules of the Securities and Exchange Act, which specifies matters that have a significant impact on shareholders' equity or securities prices): (1) Matters to be disclosed by Universal Scientific Industrial for this transaction in accordance with the regulations of the Shanghai Stock Exchange can be inquired on the Shanghai Stock Exchange website. (2) To ensure consistent information disclosure time and protect the rights and interests of investors in Taiwan and Shanghai, the announcement date coincides with the posting time on the Shanghai Stock Exchange.