ART TECHNOLOGY GROUP, INC.
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UNITED STATES
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): August 10, 2004

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, Massachusetts
  02141

 
 
 
(Address of principal executive offices)
  (Zip code)

Registrant’s telephone number, including area code: (617) 386-1000

Not Applicable


(Former Name or Former Address, if Changed Since Last Report)



 


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Item 5. Other Events and Required FD Disclosure.
Item 7. Financial Statements, Pro Forma Financial Information and Exhibits.
SIGNATURES
EX-99.1 AGREEMENT AND PLAN OF MERGER
EX-99.2 FORM OF VOTING AGREEMENT


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Item 5. Other Events and Required FD Disclosure.

     On August 10, 2004, we announced that we have agreed to acquire Primus Knowledge Solutions, Inc., a Washington corporation pursuant to the terms of a definitive agreement and plan of merger. In connection with the merger agreement, we have entered into voting agreements with stockholders of Primus holding approximately 14.6% of Primus’ outstanding common stock, pursuant to which such stockholders have agreed to vote in favor of the merger. Copies of the agreement and plan of merger and the form of voting agreement are attached as exhibits 99.1 and 99.2 to, and incorporated by reference in, this current report.

Item 7. Financial Statements, Pro Forma Financial Information and Exhibits.

         (c) Exhibits.

     
Number
  Title
99.1
  Agreement and Plan of Merger dated as of August 10, 2004, by and
among Art Technology Group, Inc., Autobahn Acquisition, Inc. and
Primus Knowledge Solutions, Inc.
 
   
99.2
  Form of Voting Agreement dated as of August 10, 2004, by and
between Art Technology Group, Inc. and each of certain individual
stockholders of Primus Knowledge Solutions, Inc.

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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.
       
Dated: August 17, 2004   By: /s/ Edward Terino

Edward Terino
Senior Vice President and Chief Financial Officer

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Exhibit Index

     
Number
  Title
99.1
  Agreement and Plan of Merger dated as of August 10, 2004, by and
among Art Technology Group, Inc., Autobahn Acquisition, Inc. and
Primus Knowledge Solutions, Inc.
 
   
99.2
  Form of Voting Agreement dated as of August 10, 2004, by and
between Art Technology Group, Inc. and each of certain individual
stockholders of Primus Knowledge Solutions, Inc.

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