Dear Shareholders,

PetroVietnam Technical Services Corporation respectfully informs its valued Shareholders and interested Investors of Official Letter No. 1398/PTSC-BTK dated August 20, 2026 regarding Disclosure of information on official Letter no. 8036/UBCK-QLCB dated August 19, 2026 of the State Securities Commission, as attached.

Sincerely./.
Attachment:
1398/PTSC-BTK