- Source of Wealth: Various Businesses
- Full Name: John P. Grayken
- Nationality: American
- Ethnicity: Irish-American
- Occupation: Businessman
- Education: University of Pennsylvania, Harvard Business School
John P. Grayken is an Irish-American businessman which has an estimated net worth of $6.5 billion as of July 2017, according to Bloomberg.
John P. Grayken worked at Keystone Group, L.P. and Morgan Stanley before forming his own firm, Lone Star Funds in 1995. He also serves as the Director of Patriot Equities Corporation and Director 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.