Source of wealth: Dell
Industry: Technology
Net worth: $39.10 billion
Michael Dell is the founder, chairman, and reigning CEO of Dell Technologies, which he started by selling computers in his dorm room at the University of Texas. In 2016, Dell merged with EMC computer storage company in a deal estimated to be $60 billion. Today, Dell lives in Austin, Texas, about 25 minutes from company headquarters in Round Rock. Through his investment firm MSD Capital, Dell holds stakes in Four Seasons Maui, Applebee's, IHOP, Calvin Klein, and Grand Central Station.