IDEXX LABORATORIES INC /DE — Director's Dealing 2011

Apr 28, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: IDEXX LABORATORIES INC /DE (IDXX)
CIK: 0000874716
Period of Report: 2011-04-26

Reporting Person: CRAIG THOMAS (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-04-26	Common Stock	M	7000	$14.53	Acquired	16684	Direct
2011-04-26	Common Stock	S	7000	$80.3290	Disposed	9684	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-04-26	Non-Qualified Stock Option (right to buy)	$14.53	M	7000	Disposed	2012-05-15	Common Stock (7000)	Direct

Footnotes

F1: The sale price reported reflects the weighted average sale price of multiple transactions on the reported date at prices that ranged from $80.3108 to $80.5300, 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.

F2: Grant of options to buy shares of common stock that vest one year from the date of grant (05/15/2003).