Groupon Inc filed for an IPO today, saying it expects to raise as much a $750 million in a regulatory filing with the Securities and Exchange Commission. The company plans to list its shares under the symbol "GRPN." The company said it had revenue of $644.7 million in the first quarter ended March 31st, compared to $44.2 million in the same period a year earlier. That signifies year-over-year revenue growth of an astronomical 1457%. The company did report a loss of $113.9 million, however, versus a loss of $8.6 million in the year earlier quarter. The company, in less than two years, has gone from five North American markets as of June 30, 2009 to 175 North American markets and 43 countries as of March 31, 2011. In that time the company said it has increased its subscriber base from 152203 to 83.1 million, with the number of merchants featured increasing from 212 to 56781.