X0306 4/A 2012-08-27 2012-08-29 0 0000874716 IDEXX LABORATORIES INC /DE IDXX 0001184151 DEADY CONAN R ONE IDEXX DRIVE WESTBROOK ME 04092 0 1 0 0 Corp VP, General Counsel & Sec Non-Qualified Stock Option (right to buy) 56.95 2012-08-27 4 M 0 3448 0 D 2015-02-13 Common Stock 3448 1693 D Grant of options to buy shares of common stock becomes exercisable as to 3,449 shares on 02/14/2009 and 02/14/2010, 3,448 shares on 02/14/2011 and 02/14/2012, and the remaining 1,693 shares on 02/14/2013. This amendment is filed to correct an error in Table II, Column 5 of the original Form 4, which was incorrectly marked as an acquisition instead of a disposition. Jennifer L. Panciocco, Attorney-in-Fact for Conan R. Deady 2012-10-11