The following are some of the main players in the insider trading case against Galleon Group hedge fund founder Raj Rajaratnam, who has vowed to clear his name at trial starting on Tuesday in Manhattan federal court:
A stock research analyst who founded Galleon in New York in 1997.
He went on to manage about $7 billion at his peak, specializing in technology stocks.
The Sri Lankan-born US citizen is 53 and is married with three children.
A onetime billionaire, he lives in an exclusive neighborhood on Manhattan's East Side.