A billionaire hedge fund boss was among five men and a woman arrested by federal authorities in a hedge fund insider trading case that prosecutors say reaped $20 million in illegal profits.

Raj Rajaratnam, a partner in Galleon Management and a portfolio manager for Galleon Group, a hedge fund with up to $7 billion in assets under management, was accused of conspiring with others to cause trades based on insider information about three publicly traded companies.

Those companies were identified in court papers as Polycom, Hilton Hotels and Google.

According to the court papers, Rajaratnam obtained insider information and then caused the Galleon Technology Funds to execute trades that earned a profit of more than $12.7 million between January 2006 and July 2007. Other schemes garnered millions more, authorities said.

Prosecutors charged the defendants with conspiracy and securities fraud.