0Zynga follows Groupon, Pandora and LinkedIn in Biggest IPO Boom YearUpdated Jul. 13, 2017 11:56PM EDT / Published Dec. 14, 2011 4:45AM EST Getty Images (2) , AP Photo (2) Getty Images (2) , AP Photo (2) Zynga Jeff Chiu / AP Photo GrouponGetty Images LinkedinMandel Ngan / AFP / Getty Images PandoraGetty Images JiveGetty Images Homeaway Bankrate YelpMarcio Jose Sanchez / AP Photo FacebookKimihiro Hoshino / AFP / Getty Images
Getty Images (2) , AP Photo (2) Zynga Jeff Chiu / AP Photo GrouponGetty Images LinkedinMandel Ngan / AFP / Getty Images PandoraGetty Images JiveGetty Images Homeaway Bankrate YelpMarcio Jose Sanchez / AP Photo FacebookKimihiro Hoshino / AFP / Getty Images