Entrepreneurs that Got Filthy Rich in 2011

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Andrew Mason, Groupon

Andrew Mason cashed in on Groupon’s IPO, which raised $700 million, becoming the largest IPO by a U.S. Internet company since Google raised $1.7 billion in 2004. With 45.9 million shares in the company, Mason’s net worth exceeds a billion dollars. Not bad for a 31 year old.

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