IDEXX LABORATORIES INC /DE — Director's Dealing 2013

May 10, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: IDEXX LABORATORIES INC /DE (IDXX)
CIK: 0000874716
Period of Report: 2013-05-08

Reporting Person: MURRAY ROBERT J (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-05-09	Common Stock	M	369	—	Acquired	16891	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-05-08	Restricted Stock Unit	$	A	429	Acquired		Common Stock (429)	Direct
2013-05-08	Non-Qualified Stock Option (right to buy)	$87.36	A	4395	Acquired	2023-05-07	Common Stock (4395)	Direct
2013-05-09	Restricted Stock Unit	$	M	369	Disposed		Common Stock (369)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	15720	Indirect
Common Stock	10526	Indirect
Common Stock	2500	Indirect

Footnotes

F1: Reflects (1) change in form of ownership of 6,948 shares from indirect through Grantor Retained Annuity Trust formed on 10/04/2010 (2010 GRAT) to direct, following 2010 GRAT annuity payment to the reporting person on 12/04/2012, and (2) excludes 10,526 shares previously owned directly, which were contributed to a Grantor Retained Annuity Trust formed on 12/20/2012 (2012 GRAT).

F2: Each restricted stock unit represents a contingent right to receive one share of IDEXX Laboratories, Inc. common stock. The restricted stock units vest 100% on the date of IDEXX Laboratories, Inc.'s next annual stockholders' meeting, which is currently scheduled to be held on 05/07/2014.

F3: Grant of options to buy shares of common stock that vest on the date of IDEXX Laboratories, Inc.'s next annual stockholders' meeting, which is currently scheduled to be held on 05/07/2014.

F4: Each restricted stock unit represents a contingent right to receive one share of IDEXX Laboratories, Inc. common stock. The restricted stock units vest 100% one year from the date of grant (05/09/2013).