. awards granted under the 2006 plan prior to december 5 , 2008 became fully vested and nonforfeitable upon the closing of the acquisition . awards may be granted under the 2006 plan , as amended and restated , after december 5 , 2008 only to employees and consultants of allied and its subsidiaries who were not employed by republic prior to such date . as of december 31 , 2013 , there were approximately 15.6 million shares of common stock reserved for future grants under the 2006 plan