A Moscow court ordered on Tuesday the release on parole of Bakhmina, 39, who has served four years of her 6-1/2-year prison term for embezzlement and tax evasion and gave birth to a daughter last November. Reports said she could be freed the same day.
"The court decision enters into force within 10 days if it no appeal is lodged," Roman Golovkin said. "And in the event of an appeal, after it has been considered."
A prosecutor in the case told reporters on Tuesday the state would not appeal the ruling, which he described as "lawful and grounded."
Bakhmina's case has attracted much attention, with Kremlin critics saying she was a political prisoner like other Yukos executives in what they call a politically motivated crackdown on the now defunct oil giant and its jailed founder Mikhail Khodorkovsky.
Her appeals for parole had been turned down several times by a court in the Volga republic of Mordovia, where she served the sentence, but the latest request was moved to a Moscow court.
Khodorkovsky welcomed the court decision on Tuesday. "I am happy. But all the same I feel a moral responsibility for this woman's destiny," he was quoted by his lawyer as saying.
The former oil tycoon is on trial on new embezzlement and money laundering charges that could add 21 years to the eight-year jail term he is already serving.