SEAN PARKER

$2.7

BILLION  SELF-MADE SCORE: * SOURCE: FACEBOOK AGE: 39 RESIDENCE: LOS ANGELES PHILANTHROPY SCORE: At 19 he upended the record industry with Napster. In 2004, at 24, he became Facebook’s first president. Both companies eventually bounced him. Now he’s funding his own ideas, investing $250 million through his cancer immunotherapy institute.