PQN: Notice of record date for a ballot

1. Issuer: PTSC Quang Ngai Joint Stock Company
2. Stock code: PQN
3. Par value: VND10,000/share
4. Record date: 21/11/2025
5. Ex-date: 20/11/2025
6. Reason:
     * For a ballot:
          - Exercise rate: 01 share - 01 voting rights
          - Content of the ballot: + Supplementing the business lines of PTSC Quang Ngai Joint Stock Company;
+ Amending and supplementing the Charter of PTSC Quang Ngai Joint Stock Company accordingly, in accordance with the content of supplementing the business lines and updating the business lines of the Company in the Charter in accordance with Decision No. 36/2025/QD-TTg dated September 29, 2025 of the Prime Minister on promulgating the System of Vietnamese Economic Sectors;
+ Approve contracts between PTSC Quang Ngai Joint Stock Company and PetroVietnam Technical Services Corporation;
+ Other issues under the authority of the General Meeting of Shareholders in accordance with the Charter of PTSC Quang Ngai Joint Stock Company (if any).
          - Exercise date: Expected November 2025, after having the List of Shareholders (specific time in the Written Opinion Form)
          - Place: At the headquarters of PTSC Quang Ngai Joint Stock Company. Address: Lot 4H Ton Duc Thang Street, Nghia Lo Ward, Quang Ngai Province.