Partner in Leon Black's private equity company Apollo Management. Studied at U. of Pennsylvania; stayed at Wharton for M.B.A. With Joshua Harris (also a billionaire) took job in M&A department of Drexel Burnham Lambert, joined Black to create Apollo 1990. Apollo is now moving toward its own initial public offering. Rowan sits on the boards of Harrah's Entertainment and Norwegian Cruise Lines, in which Apollo has big investments. Active with National Jewish Outreach Program, Youth Renewal Fund.