IDEXX LABORATORIES INC /DE — Director's Dealing 2011

Jan 6, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: IDEXX LABORATORIES INC /DE (IDXX)
CIK: 0000874716
Period of Report: 2011-01-05

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-01-05	Common Stock	M	50000	$12.6000	Acquired	301933	Direct
2011-01-05	Common Stock	S	37197	$67.6392	Disposed	264736	Direct
2011-01-05	Common Stock	S	3528	$68.0490	Disposed	261208	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-01-05	Non-Qualified Stock Option (right to buy)	$12.6000	M	50000	Disposed	2012-01-28	Common Stock (50000)	Direct

Footnotes

F1: Includes 100 shares acquired under the IDEXX Laboratories, Inc. Employee Stock Purchase Plan on 12/31/2010.

F2: The sale reported above was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 11/03/2009.

F3: The sale price reported reflects the weighted average sale price of multiple transactions on the reported date at prices that ranged from $67.00 to $67.99, 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 3 and 4 to this Form 4.

F4: The sale price reported reflects the weighted average sale price of multiple transactions on the reported date at prices that ranged from $68.00 to $68.36, inclusive.

F5: Grant of options to buy shares of common stock that vest in five equal annual installments, beginning on the first anniversary date 01/28/2003 of the date of grant.