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Andrew Mason founded online deals site Groupon in 2008 when he was in his 20s. For the company's highly-anticipated initial public offering on Nov. 4, 2011, the shares were priced at $20.
After the company missed analyst expectations for first quarter earnings, Mason wrote a note to employees in February, saying he was fired.
Mason wasn't able to move the company's revenue away from the coupons fast enough as competitors flooded the marketplace and businesses complained that the coupon hounds disrupted service to regulars and showed little loyalty.
Shares of Groupon are trading around $5.92 a share, down about 2 percent.