Dear Shareholders,

PetroVietnam Technical Services Corporation respectfully sends to valued shareholders and interested investors official Letter No. 1426/PTSC-BTK dated August 25, 2026 regarding Disclosure of information on the Notice of the issuance of shares to pay the 2025 dividend; and the Notice of the record date for exercising the right to receive the 2025 dividend in shares, including the following documents.
1. Notice No. 1419/TB-PTSC dated August 25, 2026 issued by PTSC regarding the issuance of shares to pay the 2025 dividend.
2. Notice No. 1420/TB-PTSC dated August 25, 2026 issued by PTSC regarding the record date for exercising the right to receive the 2025 dividend in shares.
, as detailed in the attached document.

Sincerely./.

Attachment:
1426/PTSC-BTK