IDEXX LABORATORIES INC /DE — Director's Dealing 2012

May 4, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: IDEXX LABORATORIES INC /DE (IDXX)
CIK: 0000874716
Period of Report: 2012-05-02

Reporting Person: NAQUI ALI (CORPORATE VICE PRESIDENT)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-05-02	Common Stock	M	9434	$38.335	Acquired	27098	Direct
2012-05-02	Common Stock	S	6674	$87.75	Disposed	20424	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-05-02	Incentive Stock Option (right to buy)	$38.335	M	2760	Disposed	2013-02-13	Common Stock (2760)	Direct
2012-05-02	Non-Qualified Stock Option (right to buy)	$38.335	M	6674	Disposed	2013-02-13	Common Stock (6674)	Direct

Footnotes

F1: Grant of options to buy shares of common stock becomes exercisable as to 874 shares on 02/14/2010, and the remaining 1,886 shares on 02/14/2011.

F2: Grant of options to buy shares of common stock becomes exercisable as to 1,888 shares on 02/14/2007 and 02/14/2008, 1,886 shares on 02/14/2009, and the remaining 1,012 shares on 02/14/2010.