THS: Notice of record date for collecting shareholders' ballots

1. Issuer: Song Da - Thanh Hoa Joint Stock Company
2. Stock code: THS
3. Par value: VND10,000/share
4. Record date: 11/09/2025
5. Ex-date: 10/09/2025
6. Reason:
     * For a ballot:
          - Exercise rate: 01 share - 01 voting rights
          - Content of the ballot: to be confirmed
          - Expected exercise date: September or October 2025
          - Venue: Head office in Southwest of the Train Station Industrial Zone, Hac Thanh Ward, Thanh Hoa