Sean Parker was an early employee at Napster and was founding president of Facebook.

Employed by Facebook: June 2004 - January 2006

Position: President

Where he is now: Parker has invested in a number of tech startups, including Spotify and Asana, and was a partner at VC firm Founder's Fund until 2014. He has a personal net worth of roughly $2.6 billion.

More recently, he's been experimenting with his own businesses. He tried to create a new buzzy video startup, Airtime, but it flopped. His most recent project is a platform for renting movies at home while they're still in theaters, but it's been met with backlash from Hollywood and theater unions.