PVS: Notice of transaction of principal shareholder

PVS announces the notice of transaction of principal shareholder as follows:

1. Name of issuer: Petroleum Technical Services Corporation

2. Stock code: PVS

3. Name of principal shareholder: PetroVietnam Finance Corporation (PVFC)

4. Representative: Doan Minh Man

5. Position in the listed company: Director

6. Securities type: Common stock

7. Number of shares held by the principal shareholder before transaction: 12,323,622 shares (12.12% of charter capital)

8. Number of shares to be disposed: 200,000 shares

9. Purpose of transaction: at the request of investment trust customer

10. Expected total holding following transaction and total percentage holding following transaction: 12,123,622 (12.12% of charter capital)

11. Expected date of transaction: From 27/3/2009 to 27/4/2009

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