SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 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): January 23, 2003 ART TECHNOLOGY GROUP, INC. (Exact Name of Registrant as Specified in Its Charter) Delaware (State or Other Jurisdiction of Incorporation) 000-26679 (Commission File Number) 04-3141918 (IRS Employer Identification No.) 25 First Street, Cambridge, MA 02141 (Address of Principal Executive Offices) (Zip Code) 617-386-1000 (Registrant's Telephone Number, Including Area Code) Not Applicable (Former Name or Former Address, if Changed Since Last Report) ITEM 5. OTHER EVENTS AND REQUIRED FD DISCLOSURE Effective January 23, 2003, Joseph T. Chung resigned as a director of ATG. ITEM 7. FINANCIAL STATEMENTS AND EXHIBITS 99.1 Press release dated January 23, 2003 regarding results for the fourth quarter and the year-ended December 31, 2002 (filed pursuant to Item 9). ITEM 9. REGULATION FD DISCLOSURE On January 23, 2003, Art Technology Group, Inc. announced its results for the fourth quarter and the year-ended December 31, 2002. A copy of the press release announcing the foregoing results is being furnished with this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference. SIGNATURE 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. Date: January 23, 2003 ART TECHNOLOGY GROUP, INC. (Registrant) By: /s/ Edward Terino ------------------------------------ Edward Terino Senior Vice President, Finance and Chief Financial Officer INDEX TO EXHIBITS 99.1 Press release dated January 23, 2003 regarding results for the fourth quarter and the year-ended December 31, 2002 (filed pursuant to Item 9).