X0202 4 2007-03-31 0 0001333513 DealerTrack Holdings, Inc. TRAK 0001222670 CIRILLO MARY A C/O DEALERTRACK HOLDINGS, INC. 1111 MARCUS AVENUE, SUITE M04 LAKE SUCCESS NY 11042 1 0 0 0 Deferred Stock Units 2007-03-31 4 A 0 406.9 30.72 A Common Stock 406.9 4051.5 D These are Deferred Stock Units acquired under the DealerTrack Holdings, Inc. Directors' Deferred Compensation Plan through Board fee deferral. Each Deferred Stock Unit is the economic equivalent of one share of DealerTrack Holdings, Inc. Common Stock. Deferred Stock Units are converted into DealerTrack Holdings, Inc. Common Stock and distributed upon the payment commencement date selected by the Reporting Person. /s/ Eric D. Jacobs as attorney-in-fact for Mary Cirillo-Goldberg 2007-04-02