PTO: Notice of record date for a ballot

1. Issuer: Post and Telecommunication Services Construction Work JSC
2. Stock code: PTO
3. Par value: VND10,000/share
4. Record date: 05/11/2025
5. Ex-date: 04/11/2025
6. Reason:
     * For a ballot:
          - Exercise rate: 01 share - 01 voting rights
          - Content of the ballot: Through signing a contract with Advanced Network Systems Vietnam Company Limited ANSV on the provision of goods and services under the package "Providing Indoor mobile broadcasting system (IBS) serving the passenger terminal - Terminal T1 - Long Thanh Airport".
          - Exercise date: From November 9, 2025 to November 20, 2025.
          - Place: 49 bis Tran Binh Trong, Binh Loi Trung ward, Ho Chi Minh City