2012 net worth: $2.1 billion
2011 net worth: $1.6 billion
Facebook's first president is looking to disrupt the Web once again with Airtime, the social video site he plans to launch with his Napster co-founder, Shawn Fanning, by the end of 2012. He's also looking to fix the very music industry he helped break with Napster in 1999 as investor and board member of Swedish music platform, Spotify. The former hacker will likely see his fortune surge even higher after Facebook goes public this spring.
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