X0202 4 2007-01-08 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 2007-01-08 4 S 0 1500 26.8019 D 233949 D Common Stock 2007-01-08 4 S 0 1500 26.88 D 232449 D Common Stock 2007-01-08 4 S 0 1500 26.90 D 230949 D Common Stock 2007-01-08 4 S 0 2038 26.9539 D 228911 D Common Stock 2007-01-08 4 S 0 1500 26.9574 D 227411 D Common Stock 2007-01-08 4 S 0 500 26.98 D 226911 D Common Stock 2007-01-08 4 S 0 2000 26.9804 D 224911 D Common Stock 2007-01-08 4 S 0 1500 26.9831 D 223411 D Common Stock 2007-08-01 4 S 0 2000 26.9839 D 221411 D Common Stock 2007-01-08 4 S 0 6500 26.99 D 214911 D Common Stock 2007-01-08 4 S 0 1290 26.9938 D 213621 D Common Stock 2007-01-08 4 S 0 10000 27.00 D 203621 D Common Stock 2007-01-08 4 S 0 210 27.0647 D 203411 D Common Stock 2007-01-08 4 S 0 462 27.10 D 202949 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 29,000 shares of restricted common stock. Mr. Blair is the Chief Executive Officer of Automotive Lease Guide (alg), Inc. /s/ Eric D. Jacobs as attorney-in-fact for John Allen Blair 2007-01-10