IDEXX LABORATORIES INC /DE — Director's Dealing 2012

Aug 3, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: IDEXX LABORATORIES INC /DE (IDXX)
CIK: 0000874716
Period of Report: 2012-08-01

Reporting Person: AYERS JONATHAN W (Director, Chairman, President & CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-08-01	Common Stock	M	20000	—	Acquired	356686	Direct
2012-08-01	Common Stock	S	14800	$88.0564	Disposed	341886	Direct
2012-08-01	Common Stock	S	200	$88.6093	Disposed	341686	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-08-01	Non-Qualified Stock Option (right to buy)	$38.3350	M	20000	Disposed	2013-02-13	Common Stock (20000)	Direct

Footnotes

F1: The sale reported above was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 04/27/2012.

F2: The sale price reported reflects the weighted average price of multiple transactions on the reported date at prices that ranged from $87.57 to $88.51, 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 ranges set forth in footnotes 2 and 3 to this Form 4.

F3: The sale price reported reflects the weighted average sale price of multiple transactions on the reported date at prices that ranged from $88.58 to $88.63, inclusive.

F4: Grant of options to buy shares of common stock becomes exercisable as to 12,000 shares on 02/14/2007, 02/14/2008, 02/14/2009, 02/14/2010, and the remaining 9,392 shares on 02/14/2011.