HEES: Common stock, $0.01 par value, 175,000,000 shares authorized; 38,706,668 and 38,699,666 shares issued at June 30, 2011 and December 31, 2010, respectively, and 34,995,895 and 35,029,804 shares outstanding at June 30, 2011 and December 31, 2010, respectively