X0202 4/A 2005-12-08 2005-12-08 0 0001086195 ART TECHNOLOGY GROUP INC ARTG 0001229367 REGIS DANIEL C ONE MAIN STREET CAMBRIDGE MA 02142 1 0 0 0 Common Stock 4893 D Common Stock 2005-12-08 4 P 0 10000 1.65 A 20000 I By Regis Family Limited Partnership This amended Form 4 is filed to correct the reporting of the acquisition of 10,000 shares on December 8, 2005 originally reported on a Form 4 filed on December 5, 2005. The acquisition was inadvertently reported as a direct acquisition by the reporting person instead of an indirect acquisition by the Regis Family Limited Partnership. No other details of the acquisition (including the number of shares purchased and purchase price) have been changed in this amendment. /s/Jeffrey T. Kowalski by Power of Attorney 2007-04-27