COM: Transaction of major shareholder

Materials - Petroleum Joint Stock Company (COMECO) has announced a transaction of major shareholder as follows:

* Stock symbol: COM

* Investor: PV Oil

* Owning volume before trading: 2.179.100 shares (22.85%)

* Registered volume to buy: 200,000  shares

* Owning volume after trading: 2,379,100 shares (24.95%)

* Trading method: Order matching or put through

* Expected trading period: From July 21, 2010 to September 21, 2010.

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>   HMC: Transaction of inside shareholder (19/07/2010)

>   HSG: Transaction of affiliated institution (19/07/2010)

>   NTL: Trading result of inside shareholder (19/07/2010)

>   SBC: Transaction of affiliated person (19/07/2010)

>   HRC: Trading result of inside shareholder (19/07/2010)

>   SCD: Transaction of major shareholder (19/07/2010)

>   SSC: Trading result of major shareholder (19/07/2010)

>   TMT: Transaction of affiliated person (19/07/2010)

>   TMT: Transaction of affiliated institution (19/07/2010)

>   VHG: Transaction of affiliated person (19/07/2010)