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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
874716	Idexx Laboratories Inc	IDXX	In Vitro & In Vivo Diagnostic Substances (2835)	010393723

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1184149	W Jonathan Ayers	One Idexx Drive Westbrook ME 04092	Chairman, President & Ceo	Yes	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Acquisiton	2011-01-05	50,000	$12.60	301,933	No	4	M	Direct
Common Stock	Disposition	2011-01-05	37,197	$67.64	264,736	No	4	S	Direct
Common Stock	Disposition	2011-01-05	3,528	$68.05	261,208	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	S	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Non-Qualified Stock Option (right to buy)	Disposition	2011-01-05	50,000	$0.00	50,000	$12.60

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
240,320		2012-01-28	No	4	M	Direct

Footnotes

Includes 100 shares acquired under the IDEXX Laboratories, Inc. Employee Stock Purchase Plan on 12/31/2010.
The sale reported above was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 11/03/2009.
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.
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.
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.