Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number: 3235-0287
Expires: January 31, 2005
Estimated average burden hours per response... 0.5

(Print or Type Responses)
1. Name and Address of Reporting Person *
TONELLI QUENTIN J
   2. Issuer Name and Ticker or Trading Symbol
IDEXX LABORATORIES INC /DE [IDXX] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Vice President
(Last)
(First)
(Middle)
C/O IDEXX LABORATORIES, INC., ONE IDEXX DRIVE		 3. Date of Earliest Transaction (Month/Day/Year)
02/23/2006
(Street)

WESTBROOK, ME 04092		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 02/23/2006   M   2,200 A $ 57.31 15,496 D  
Common Stock 02/23/2006   S   2,200 D $ 77.7301 13,296 D  
Common Stock 02/23/2006   M   2,200 A $ 50.9 15,496 D  
Common Stock 02/23/2006   S   2,200 D $ 77.7301 13,296 D  
Common Stock 02/23/2006   M   3,200 A $ 34.27 16,496 D  
Common Stock 02/23/2006   S   3,200 D $ 77.7512 13,296 D  
Common Stock 02/23/2006   M   4,000 A $ 26.63 17,296 D  
Common Stock 02/23/2006   S   4,000 D $ 77.743 13,296 (1) (2) D  

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number. SEC 1474 (9-02)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Non-Qualified Stock Option (right to buy) $ 26.63 02/23/2006   M     4,000   (3) 02/12/2012 Common Stock 4,000 $ 26.63 245 D  
Non-Qualified Stock Option (right to buy) $ 34.27 02/23/2006   M     3,200   (4) 02/06/2013 Common Stock 3,200 $ 34.27 3,482 D  
Non-Qualified Stock Option (right to buy) $ 50.9 02/23/2006   M     2,200   (5) 02/04/2014 Common Stock 2,200 $ 50.9 4,636 D  
Non-Qualified Stock Options (right to buy) $ 57.31 02/23/2006   M     2,200   (6) 02/02/2015 Common Stock 2,200 $ 57.31 7,056 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
TONELLI QUENTIN J
C/O IDEXX LABORATORIES, INC.
ONE IDEXX DRIVE
WESTBROOK, ME 04092		       Vice President  

Signatures

 Conan R. Deady, Attorney-in-Fact for Quentin J. Tonelli   02/24/2006
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) The reporting person also indirectly holds 3,575 shares of Common Stock of IDEXX Laboratories, Inc., which shares are held by the Bret C. Tonelli, UTMA account with Charles Schwab. The reporting person disclaims beneficial ownership of these shares and this report should not be deemed an admission that the reporting person is the beneficial owner of such shares for purposes of Section 16 or any other purpose.
(2) Includes 40 shares acquired pursuant to the IDEXX Laboratories, Inc. Employee Stock Purchase Plan on December 30, 2005.
(3) Grant of option to buy shares of Common Stock exercisable as to 4,000 shares on 2/12/03, 2/12/04, 2/12/05 and 2/12/06 and 245 shares on 2/12/07.
(4) Grant of option to buy shares of IDEXX Laboratories, Inc. Common Stock exercisable in five equal annual increments, beginning on the first anniversary date (2/06/2004) of the date of grant.
(5) Grant of option to buy shares of IDEXX Laboratories, Inc. Common Stock exercisable in five equal annual increments, beginning on the first anniversary date (2/05/2005) of the date of grant.
(6) Grant of option to buy shares of IDEXX Laboratories, Inc. Common Stock exercisable in five equal annual increments, beginning on the first anniversary date (2/03/2006) of the date of grant.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.