X0202 4 2006-07-17 0 0001333513 DealerTrack Holdings, Inc. TRAK 0001342332 Jacobs Eric Douglas C/O DEALERTRACK HOLDINGS, INC. 1111 MARCUS AVENUE, SUITE M04 LAKE SUCCESS NY 11042 0 1 0 0 SVP, GC and Secretary Common Stock 2006-07-17 4 S 0 6000 21.64 D 26866 D Common Stock 18134 I By Self as Trustee for The Eric D. Jacobs Grantor Retained Annuity Trust The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 12, 2005. Includes 17,500 shares of restricted common stock. Also includes 1,866 shares previously owned indirectly which were transferred from The Eric D. Jacobs Grantor Retained Annuity Trust to Mr. Jacobs on July 14, 2006. /s/ Eric D. Jacobs 2006-07-18