Ruentex All Announces Change of Information Security Officer

Disclosure Date: July 21, 2026 Announcement Date: July 20, 2026 Announcement Time: 16:21:41 Company Code: 2915 Company Name: Ruentex All Subject: Announcement Regarding Change of Information Security Officer Applicable Clause: Clause 8 Factual Date: July 20, 2026

Details: 1. Type of Personnel Change (Please specify: Spokesperson, Acting Spokesperson, Key Operational Executive (e.g., CEO, COO, CMO, CSO, etc.), Financial Officer, Accounting Officer, Corporate Governance Officer, Information Security Officer, R&D Officer, Internal Audit Officer, or Litigation/Non-litigation Agent): Information Security Officer

2. Date of Change: July 20, 2026

3. Former Officer's Name, Title, and Background: Huang Chien-Hua, Deputy General Manager of Information Division

4. New Officer's Name, Title, and Background: Not yet appointed

5. Nature of Change (Please enter 'Resignation', 'Job Reassignment', 'Layoff', 'Retirement', 'Death', 'New Appointment', or 'Dismissal'): Retirement

6. Reason for Change: Retirement

7. Effective Date: July 20, 2026

8. Other Matters to be Disclosed: The appointment of a new Information Security Officer will be determined by the Board of Directors and announced separately upon confirmation.