Unimicron Technology (6658) Announces New Representative for Corporate Director

Statement Date: 2026/05/19 Spokesperson's Date: 2026/05/18 Spokesperson's Time: 13:37:37 Company Code: 6658 Company Name: Unimicron Technology Subject: Announcement of the appointment of a representative by the company's corporate director. Applicable Clause: Article 6 Date of Occurrence: 2026/05/18 Explanation: 1. Date of change: 2026/05/18 2. Name of legal entity: Chi-Bin Industrial Co., Ltd. 3. Name of former appointee: Not applicable 4. Bio of former appointee: Not applicable 5. Name of new appointee: Representative of Chi-Bin Industrial Co., Ltd., Sheng-Che Chueh 6. Bio of new appointee: Chairman of EDX Technologies Corp. 7. Reason for change: Appointment of a representative by the corporate director. 8. Original term of office (e.g., yyyy/mm/dd to yyyy/mm/dd): Not applicable 9. Effective date of new appointment: 2026/05/18 10. Other remarks: None.