Dinggi Advanced Materials Announces Management Personnel Change

Announcement Date: 2026/05/16 Statement Date: 2026/05/15 Statement Time: 15:06:14 Company Code: 6585 Company Name: Dinggi (鼎基) Subject: Announcement of Management Personnel Change Article: Clause 8 Date of Event: 2026/05/15 Explanation: 1. Category of personnel change (e.g., spokesperson, deputy spokesperson, important operational supervisor, etc.): Important operational supervisor. 2. Date of change: 2026/05/15 3. Name, title, and profile of the outgoing person: Huang Junjie / Deputy Factory Manager of the company. 4. Name, title, and profile of the incoming person: Huang Junjie / Factory Manager of the company. 5. Circumstances of the change (e.g., resignation, job adjustment, dismissal, etc.): Job adjustment. 6. Reason for the change: Promotion. 7. Effective date: 2026/06/01 8. Other matters to be specified: None.