Dear Shareholders,

PetroVietnam Technical Services Corporation respectfully sends to Valued Shareholders and interested Investors Official Letter No. 171/PTSC-BTK dated February 04, 2026 regarding disclosure of information Resolution regarding the change of contracting entity, and transfer of rights and obligations under Charter Contract of FPSO PTSC Lam Son, as attached.

Sincerely./.
Attachment:
171/PTSC-BTK