On January 14, 2026, PetroVietnam Technical Services Corporation (PTSC) received the Letter regarding to the Correction of Report on the Results of the Share Transaction dated December 22, 2025, submitted by Mr. Lê Chiến Thắng – Vice President. The main information is as follows:
II. Correction Information
5. Number of shares/fund certificates/covered warrants being traded (purchase/sell/present/be present/donate/be donated/inherit/transfer/be transferred/swap).
- Type of transaction executed:  sold
- Number of shares traded:123.600 
6. The value of executed transaction (calculated based on par value): 1,236,000,000 VND (calculated at face value of 10,000 VND/share)
III. Reason: Due to an error in data entry, the information regarding the number of shares sold was inaccurately declared; the number of shares remaining after the transaction has been correctly declared. Accordingly, the number of PVS shares I own after December 19, 2025 is 10,043 shares, including 1,300 unsold shares and 8,743 additional shares allocated in the 2024 dividend issuance.
( Other information not mentioned in Section III above remains unchanged from the information in the Transaction Results Report dated December 22, 2025)

Sincerely.