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Disclosure of information on the Confirmation of changes to enterprise registration information

Dear Shareholders,

PetroVietnam Technical Services Corporation respectfully informs its valued Shareholders and interested Investors of Official Letter No. 1213/PTSC-BTK dated July 17, 2026 regarding disclosure of information on the Confirmation of changes to enterprise registration information, as attached.

Sincerely./.

Attachment:

1213/PTSC-BTK