John P Grayken Net Worth $5.15 Billion
John P. Grayken is an Irish-American businessman which has an estimated net worth of $5.15 billion as of February 2015. John P. Grayken worked at Keystone Group, L.P. and Morgan Stanley before forming his own company, Lone Star Funds in 1995. He additionally serves as the Manager of Patriot Equities Corporation and Manager of Korea Exchange Bank. John P. Grayken graduated from University of Pennsylvania in and received his M.B.A. at Harvard Business School in 1982.