Dear Shareholders,

PetroVietnam Technical Services Corporation respectfully sends to Valued Shareholders and interested Investors Official Letter No. 1548/PTSC-BTK dated September 24, 2026 regarding Disclosure of the Report on the results of the share issuance for dividend payment, including the following documents.
1. Report No. 1543/BC-PTSC dated September 24, 2026 issued by PetroVietnam Technical Services Corporation on the Results of the share issuance for dividend payment.

2. Notice No. 1544/TB-PTSC dated September 24, 2026 issued by PetroVietnam Technical Services Corporation regarding the change in the number of shares with voting rights.

, as detailed in the attached document.

Sincerely./.

Attachment:
1548/PTSC-BTK