226. Mark Cuban
$3.3 billion * self-made score: source: online Media age: 59 residence: dallas B.s., indiana u. ’81 In September, the Shark Tank star and owner of the NBA’S Dallas Mavericks lent his plane to deliver supplies to Hurricane Maria victims in Puerto Rico. As an Indiana undergrad, Cuban briefly ran a bar, Motley’s Pub, which he started with rugby teammates. It lasted for only one school year; according to his college yearbook, Motley’s shuttered in May 1980 after “alleged state liquor law violations.” His later ventures have been much more successful. He and fellow IU alum Todd Wagner sold Broadcast.com to Yahoo for $5.7 billion in stock in 1999.