Mansoor Ijaz (born August 1961) is a Pakistani-American venture financier and hedge-fund manager. He is founder and chairman of Crescent Investment Management Ltd, a New York and London-based investment firm that operates CARAT, a proprietary trading system developed by Ijaz in the late 1980s. His venture investments included unsuccessful efforts in 2013 to acquire a stake in Lotus F1, a Formula One team. In the 1990s, Ijaz and his companies were contributors to Democratic Party institutions as well as the presidential candidacies of Bill Clinton.