Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF 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
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Trinder David
 2. Date of Event Requiring Statement (Month/Day/Year)
12/12/2005		 3. Issuer Name and Ticker or Trading Symbol
DealerTrack Holdings, Inc. [TRAK]
(Last)
(First)
(Middle)
C/O DEALERTRACK HOLDINGS, INC., 1111 MARCUS AVENUE, SUITE M04		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
*
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

LAKE SUCCESS, NY 11042		 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 Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock 11,666
D
 
Restricted Common Stock 5,000 (1)
D
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Non-Qualified Stock Option (right to buy)   (2) 05/25/2015 Common Stock 35,000 $ 12.92 D  
Non-Qualified Stock Option (right to buy)   (3) 08/17/2014 Common Stock 10,000 $ 2.8 D  
Non-Qualified Stock Option (right to buy)   (4) 07/01/2014 Common Stock 3,000 $ 2.8 D  
Non-Qualified Stock Option (right to buy)   (5) 01/29/2014 Common Stock 23,334 $ 2.8 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Trinder David
C/O DEALERTRACK HOLDINGS, INC.
1111 MARCUS AVENUE, SUITE M04
LAKE SUCCESS, NY 11042		       *  

Signatures

/s/ Eric D. Jacobs as attorney-in-fact for David Trinder 12/12/2005
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(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) 25% of the shares of restricted common stock will vest yearly from May 26, 2005, such that 100% of the shares will be fully vested on May 26, 2009.
(2) 25% of the shares subject to the option will vest on the first anniversary date of May 26, 2005, and 1/36th of the remaining shares subject to the option will vest each month thereafter, such that 100% of the shares subject to the option will be fully vested on May 26, 2009.
(3) 25% of the shares subject to the option will vest on the first anniversary date of August 18, 2004, and 1/36th of the remaining shares subject to the option will vest each month thereafter, such that 100% of the shares subject to the option will be fully vested on August 18, 2008.
(4) 25% of the shares subject to the option will vest on the first anniversary date of July 1, 2004, and 1/36th of the remaining shares subject to the option will vest each month thereafter, such that 100% of the shares subject to the option will be fully vested on July 1, 2008.
(5) 35,000 shares subject to an option were granted on January 30, 2004. 25% of the shares subject to the option will vest on the first anniversary date of January 1, 2004, and 1/36th of the remaining shares subject to the option will vest each month thereafter, such that 100% of the shares subject to the option will be fully vested on Janaury 1, 2008. On May 24, 2005, 11,666 shares subject to the option had vested and were exercisable; Mr. Trinder exercised his option to purchase these 11,666 shares. As a result, a total of 23,334 shares remain subject to the option.
 
Remarks:
* Mr. Trinder is President of DealerTrack Aftermarket Services, Inc.

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