Groupon, a local discount coupon e-retailer that connects consumers to merchants with daily local deals around the world. The Chicago based, two year old company went public on November 4th, 2011 and headed down a choppy road due to its controversial valuation procedures. In March 2012, they released revenue of $559.283 million, and has a market cap. of $6,496.73 million with 645.80 million shares outstanding.