The conviction of Raj Rajaratnam as the ringleader in five insider trading conspiracies has been upheld by the U.S. Court of Appeals for the Second Circuit.

The circuit on Monday rejected Rajaratnam's claim that the government made critical misstatements and omissions in its initial application for a wiretap that recorded the cellphone calls used to bring the one-time billionaire to trial in the Southern District and convict him in 2011.