CST: Notice of record date for Extraordinary General Meeting of Shareholders 2025

1. Issuer: Cao Son Coal Joint Stock Company
2. Stock code: CST
3. Par value: VND10,000/share
4. Record date: 01/07/2025
5. Ex-date: 30/06/2025
6. Reason:
     * Extraordinary General Meeting of Shareholders 2025
          - Exercise rate: 01 share - 01 voting rights
          - Place: Meeting Room 101, 1st Floor, Office of Cao Son Coal Joint Stock Company – TKV, Group 1, Cao Son 2 Area, Cam Son Ward, Cam Pha City, Quang Ninh Province
          - Estimated time: Half a day, expected to take place between the last week of July and the first week of August 2025.
 Agenda: Discussion and voting on the following matters:
a. Approval of the General Meeting agenda
b. Approval of the Meeting regulations
c. Election of the Board of Directors (BOD) and Supervisory Board (SB) for the 2025–2030 term:
- Election of the Board of Directors for the 2025–2030 term:
+ Number of BOD members: 05
+ Criteria, structure, and composition of BOD members: In accordance with the Enterprise Law and the Company's Charter
- Election of the Supervisory Board for the 2025–2030 term:
+ Number of SB members: 05
+ Criteria, structure, and composition of SB members: In accordance with the Enterprise Law and the Company's Charter
d. Other matters within the authority of the General Meeting of Shareholders