X0202 4/A 2007-04-02 2007-04-02 0 0001333513 DealerTrack Holdings, Inc. TRAK 0001342884 Blair John Allen C/O DEALERTRACK HOLDINGS, INC. 1111 MARCUS AVENUE, SUITE M04 LAKE SUCCESS NY 11042 0 1 0 0 * Please see below Common Stock 2007-04-02 4 S 0 500 30.75 D 169449 D Common Stock 2007-04-02 4 S 0 1000 30.74 D 168449 D Common Stock 2007-04-02 4 S 0 470 30.72 D 167979 D Common Stock 2007-04-02 4 S 0 1000 30.71 D 166979 D Common Stock 2007-04-02 4 S 0 1000 30.6726 D 165979 D Common Stock 2007-04-02 4 S 0 500 30.67 D 165479 D Common Stock 2007-04-02 4 S 0 530 30.66 D 164949 D The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on October 6, 2006. Includes 31,250 shares of restricted common stock. Mr. Blair is the Chief Executive Officer of Automotive Lease Guide (alg), Inc. The original Form 4 filed April 2, 2007 mistakenly stated that Mr. Blair had sold a total of 6,500 shares on April 2, 2007. The correct amount that Mr. Blair sold on April 2, 2007 was 5,000 shares and this Amendment sets forth the proper sale amounts and share prices. /s/ Eric D. Jacobs as attorney-in-fact for John Allen Blair 2007-04-05