UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 --------- FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): October 29, 2004 Art Technology Group, Inc. (Exact Name of Registrant as Specified in its Charter) Delaware 000-26679 04-3141918 (State or Other Jurisdiction (Commission (IRS Employer of Incorporation) File Number) Identification No.) 25 First Street, Cambridge, Massachusetts 02141 (Address of Principal Executive Offices) (Zip Code) Registrant's telephone number, including area code: (617) 386-1000 Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: [ ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) [ ] Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) [ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) [ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Item 8.01 Other Events. On October 29, 2004 we issued a press release related to stockholder approval of our proposed acquisition of Primus Knowledge Solutions, Inc. The press release is attached as Exhibit 99.1 and incorporated herein by reference. Item 9.01 Financial Statements and Exhibits. (c) Exhibits Number Title 99.1 October 29, 2004 press release -2- SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. ART TECHNOLOGY GROUP, INC. Date: October 29, 2004 By: /s/ Edward Terino --------------------------------------- Edward Terino Senior Vice President and Chief Financial Officer Exhibit Index Number Title ------ ----- 99.1 October 29, 2004 press release -3-