IDEXX LABORATORIES INC /DE — Director's Dealing 2011

Nov 18, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: IDEXX LABORATORIES INC /DE (IDXX)
CIK: 0000874716
Period of Report: 2011-11-17

Reporting Person: AYERS JONATHAN W (Director, CHAIRMAN, PRESIDENT & CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-11-17	Common Stock	M	20000	$12.6	Acquired	327697	Direct
2011-11-17	Common Stock	S	1400	$72.7579	Disposed	326297	Direct
2011-11-17	Common Stock	S	6400	$73.7864	Disposed	319897	Direct
2011-11-17	Common Stock	S	1200	$74.9133	Disposed	318697	Direct
2011-11-17	Common Stock	S	4900	$75.9423	Disposed	313797	Direct
2011-11-17	Common Stock	S	1100	$76.6636	Disposed	312697	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-11-17	Non-Qualified Stock Option (right to buy)	$12.6	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 $72.27 to $73.21, 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 through 6 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 $73.41 to $74.3875, inclusive.

F4: The sale price reported reflects the weighted average sale price of multiple transactions on the reported date at prices that ranged from $74.41 to $75.37, inclusive.

F5: The sale price reported reflects the weighted average sale price of multiple transactions on the reported date at prices that ranged from $75.494 to $76.4525, inclusive.

F6: The sale price reported reflects the weighted average sale price of multiple transactions on the reported date at prices that ranged from $76.50 to $76.82, inclusive.

F7: 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.