IDEXX LABORATORIES INC /DE — Director's Dealing 2011

Jul 29, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: IDEXX LABORATORIES INC /DE (IDXX)
CIK: 0000874716
Period of Report: 2011-07-27

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-07-27	Common Stock	M	20000	$12.60	Acquired	307618	Direct
2011-07-27	Common Stock	S	9300	$83.0665	Disposed	298318	Direct
2011-07-27	Common Stock	S	4000	$83.9729	Disposed	294318	Direct
2011-07-27	Common Stock	S	1700	$84.7720	Disposed	292618	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-07-27	Non-Qualified Stock Option (right to buy)	$12.60	M	20000	Disposed	2012-01-28	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 03/03/2011.

F2: The sale price reported reflects the weighted average sale price of multiple transactions on the reported date at prices that ranged from $82.60 to $83.59, 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.

F3: The sale price reported reflects the weighted average sale price of multiple transactions on the reported date at prices that ranged from $83.60 to $84.32, 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.

F4: The sale price reported reflects the weighted average sale price of multiple transactions on the reported date at prices that ranged from $84.60 to $84.91, nclusive. 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.

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.