David Rubenstein made his fortune by collecting management fees from investors who gave him money to invest on their behalf. : Once dubbed a “master fundraiser” by Forbes Magazine, David Rubenstein and his team at the asset management giant The Carlyle Group (CG) manages billions of assets for a wide range of U.S. and international institutional investors. A billionaire with a simple lifestyle and a generous heart, Rubenstein has joined other successful entrepreneurs like Warren Buffett and Mark Zuckerberg who have pledged to donate more than half of their wealth as part of The Giving Pledge campaign.