Sales growth rank: 1
Kravis and partner George Roberts took their 34-year-old leveraged buyout shop public earlier this year in an offering that valued the firm at $2 billion. Since then, KKR has been making big investments in oil and gas, including the recent purchase of Chevron's 23% stake in Colonial Pipeline. It also hired a number of Goldman Sachs traders to form a hedge fund that will focus on equities. Outside the boardroom, the leveraged buyout king made a splash pledging $100 million to his alma mater, Columbia University.