. no further awards have been granted under the 2006 plan or under the teamshare plan since may 2009 , and shares remaining available for grant under those plans have been merged into the 2009 plan . vested stock options previously granted under the 2006 plan , the teamshare plan and another prior plan , the 2001 stock incentive plan , remained outstanding as of december 31 , 2015 . we have reserved the maximum number of shares of common stock available for award under the terms of each of these plans