MARK CUBAN

$4.1 BILLION  SELF-MADE SCORE: * SOURCE: ONLINE MEDIA AGE: 61 RESIDENCE: DALLAS

PHILANTHROPY SCORE:

In September Cuban sold part of his stake in HDNet, the parent company of AXS TV and HDNet Movies, for an undisclosed sum. In December he and his business partner Todd Wagner sold cinema chain Landmark Theatres to real estate magnate Charles Cohen

(No. 239). The Shark Tank star founded video portal Broadcast. com with fellow Indiana University alum Wagner in 1995 and sold it to Yahoo for $5.7 billion in stock in 1999. He bought the Dallas Mavericks for $280 million in 2000; today it is worth nearly $2.3 billion. At 12, Cuban sold garbage bags door-to-door after his dad wouldn’t give him money to buy new sneakers.