PET: Guarantee for PSMT at Vietinbank.

Guarantee for PSMT at Vietinbank of Petrovietnam General Services Corporation as follows:

HOSE

>   PDN: BOD resolution dated March 28, 2025 (10/04/2025)

>   HDB: BOD resolution dated March 26, 2025 (10/04/2025)

>   HCM: BOD resolution dated March 27, 2025 (10/04/2025)

>   CTG: BOD resolution dated March 28, 2025 (10/04/2025)

>   DGW: BOD resolution dated March 28, 2025 (10/04/2025)

>   CHP: BOD resolution dated March 26, 2025 (10/04/2025)

>   C47: Explanation for measures and roadmap to overcome the situation of warned securities (10/04/2025)

>   BCM: BOD resolution dated March 28, 2025 (10/04/2025)

>   BAF: Reporting materials on result of private placement of shares (10/04/2025)

>   BAF: Change of outstanding voting shares (10/04/2025)