The deal, carried out by order matching on the Ho Chi Minh City Stock Exchange between August 27 and September 14, increases its holding in Petrolimex to 9 percent.
It was the second time this year that Petrolimex sold treasury shares after selling 15 million shares in June for VND680 billion ($29 million).
Last year it had sold 32 million shares for nearly VND2 trillion.
It reported a loss of VND1.08 trillion in the first half of this year as oil prices plummeted due to the coronavirus pandemic. Revenues fell 29 percent to VND65 trillion.