IDEXX LABORATORIES INC /DE — Director's Dealing 2012

Aug 10, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

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

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-08-08	Common Stock	M	20000	$17.135	Acquired	361686	Direct
2012-08-08	Common Stock	S	5800	$88.8494	Disposed	355886	Direct
2012-08-08	Common Stock	S	9200	$89.8286	Disposed	346686	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-08-08	Non-Qualified Stock Options (right to buy)	$17.1350	M	20000	Disposed	2013-02-06	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 sale price of multiple transactions on the reported date at prices that ranged from $88.16 to $89.15, 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 $89.18 to $90.08, inclusive.

F4: Grant of options to buy shares of common stock becomes exercisable as to 30,000 shares on 02/06/2004, 02/06/2005, 02/06/2006, 02/06/2007, and the remaining 24,164 shares on 02/06/2008.