X0305 4 2012-04-24 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 Common Stock 2012-04-24 4 M 0 2384 41.935 A 19128 D Common Stock 2012-04-24 4 M 0 1704 41.935 A 20832 D Common Stock 2012-04-24 4 M 0 3773 34.37 A 24605 D Common Stock 2012-04-24 4 M 0 3609 36.09 A 28214 D Common Stock 2012-04-24 4 S 0 14470 85.3124 D 13744 D Incentive Stock Option (right to buy) 41.9350 2012-04-24 4 M 0 2384 0 D 2014-02-13 Common Stock 2384 0 D Non-Qualfied Stock Option (right to buy) 41.9350 2012-04-24 4 M 0 1704 0 D 2014-02-13 Common Stock 1704 0 D Non-Qualified Stock Option (right to buy) 34.37 2012-04-24 4 M 0 3773 0 D 2016-02-13 Common Stock 3773 4635 D Non-Qualified Stock Option (right to buy) 53.31 2012-04-24 4 M 0 3609 0 D 2017-02-13 Common Stock 3609 8950 D The sale price reported reflects the weighted average sale price of multiple transactions on the reported date at prices that ranged from $85.25 to $85.42, inclusive. The reporting person hereby undertakes to provide upon request to SEC staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price within the range. Grant of options to buy shares of common stock becomes exercisable as to 218 shares on 02/14/2011, and the remaining 2,384 shares on 02/14/2012. Grant of options to buy shares of common stock becomes exercisable as to 4,088 shares on 02/14/2008, 02/14/2009 and 02/14/2010, 3,870 shares on 02/14/2011, and the remaining 1,704 shares on 02/14/2012. Grant of options to buy shares of common stock becomes exercisable as to 3,772 shares on 02/14/2010 and 02/14/2013, 3,773 shares on 02/14/2011 and 02/14/2012, and the remaining 863 shares on 02/14/2014. Grant of options to buy shares of common stock becomes exercisable as to 3,609 shares on 02/14/2011, 02/14/2012 and 02/14/2013, 3,608 shares on 02/14/2014, and the remaining 1,733 shares on 02/14/2015. Jennifer L. Panciocco, Attorney-in-Fact for Conan R. Deady 2012-04-26