Entrepreneurs that Got Filthy Rich in 2011

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Eric Lefkofsky, Groupon

Eric Lefkofsky provided $1 million in seed money to Andrew Mason to develop the idea for the coupon buying site. Just a few years later, Lefkofsky and his wife, who are the biggest shareholders in Groupon (even bigger than Mason), got a bump in their net worth when the Groupon IPO popped. According to Forbes, Lefkofksy is now worth around $4 billion—$3.6 billion of which is from Groupon.