David Rubenstein

David Rubenstein is one of three billionaire founders of private equity firm Carlyle Group; he now serves as executive co-chairman.Rubenstein got his start as a Carter Administration official and later became an attorney.He cofounded Carlyle in 1987 with William Conway and Daniel D'Aniello.In the early days Rubenstein raised the money and managed Carlyle's stable of advisers, which included George H.W. Bush. He donated $18.5 million in 2016 to restore the Lincoln Memorial and expand exhibits and research there.