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"He went out Saturday night," a prisons spokesperson told AFP.
Appeals Court judge Simone Schreiber ruled earlier Saturday that the detention of the magnate once considered Brazil's richest man "violated the Constitution... and the principle of presumption of innocence."
Batista, 62, had been under house arrest pending an appeal of a 30-year jail sentence.
Then on Thursday he was arrested in Rio de Janeiro on suspicion of insider trading and money laundering, the news portal G1 said.
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An emblem of Brazil's boom years, Batista amassed a fortune with investments in mining and oil that in 2012 put him in seventh place on the Forbes magazine list of the world's wealthiest people.
But by 2013 a downturn in the commodities market wiped out a fortune that had been estimated at $30 billion.
Batista later came under scrutiny in the vast "Car Wash" investigation, which revealed mass corruption by public officials linked to state oil company Petrobras.
Brazil's security commission in May fined him around $134 million for insider trading.
In 2018, Batista was sentenced to 30 years in prison for corruption and money laundering. He was found guilty of paying a $16.5 million bribe to former Rio governor Sergio Cabral.