Andrew Mason sells big portion of Groupon stake     By  Ellen HirstTribune reporter 3:17 p.m. CST, February 14, 2014
  Groupon co-founder Andrew Mason has sold more than half of his stock in the company since being ousted from the role of CEO almost a year ago, according to a regulatory filing Friday.
  Mason currently has 18 million shares of Class A common stock, less than 3 percent of the company's outstanding shares. At the end of 2012, he held 45.6 million shares, about 7 percent.
  Mason also owns almost 1 million shares of Class B common stock, which give shareholders disproportionate voting power with 150 votes per share.
  Co-founder Eric Lefkofsky, who was named Groupon CEO in August, and a third co-founder, Brad Keywell, also hold Class B shares.
  Groupon’s stock price has more than doubled since Mason’s departure, closing at $10.51 on Friday.
  ehirst@tribune.com
  chicagotribune.com |