Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
Volpe Kenneth Z
   2. Issuer Name and Ticker or Trading Symbol
ART TECHNOLOGY GROUP INC [ARTG] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
SVP, Products and Technology
(Last)
(First)
(Middle)
25 FIRST STREET, 2ND FLOOR		 3. Date of Earliest Transaction (Month/Day/Year)
02/28/2006
(Street)

CAMBRIDGE, MA 02141		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Option (Right to buy) $ 2.93 02/28/2006   A   130,000   05/28/2006(1) 02/28/2016 Common Stock 130,000 $ 0 130,000 D  
Employee Stock Option (Right to buy) $ 0.25             01/21/1999 10/20/2008 Common Stock 44,200   44,200 D  
Employee Stock Option (Right to buy) $ 0.91             01/21/2005 04/20/2013 Common Stock 43,750   43,750 D  
Employee Stock Option (Right to buy) $ 0.91             07/21/2003 04/20/2013 Common Stock 26,250   26,250 D  
Employee Stock Option (Right to buy) $ 0.96             02/28/2003 08/28/2012 Common Stock 10,000   10,000 D  
Employee Stock Option (Right to buy) $ 0.96             02/28/2005 08/29/2014 Common Stock 117,188   117,188 D  
Employee Stock Option (Right to buy) $ 0.96             11/30/2004 08/29/2014 Common Stock 7,812   7,812 D  
Employee Stock Option (Right to buy) $ 0.99             03/03/2003 03/02/2013 Common Stock 13,333   13,333 D  
Employee Stock Option (Right to buy) $ 1.26             01/25/2006 01/24/2015 Common Stock 100,000   100,000 D  
Employee Stock Option (Right to buy) $ 1.57             01/30/2005 01/29/2014 Common Stock 40,625   40,625 D  
Employee Stock Option (Right to buy) $ 1.57             04/30/2004 01/29/2014 Common Stock 9,375   9,375 D  
Employee Stock Option (Right to buy) $ 1.63             02/13/2005 11/12/2013 Common Stock 22,500   22,500 D  
Employee Stock Option (Right to buy) $ 1.63             02/13/2004 11/12/2013 Common Stock 7,500   7,500 D  
Employee Stock Option (Right to buy) $ 2.13             02/03/2002 08/02/2011 Common Stock 14,998   14,998 D  
Employee Stock Option (Right to buy) $ 2.13             02/03/2003 08/02/2011 Common Stock 2   2 D  
Employee Stock Option (Right to buy) $ 3.9             01/08/2004 01/07/2012 Common Stock 1,251   1,251 D  
Employee Stock Option (Right to buy) $ 3.9             04/08/2002 01/07/2012 Common Stock 2,749   2,749 D  
Employee Stock Option (Right to buy) $ 4.7812             07/09/2001 04/08/2011 Common Stock 8,266   8,266 D  
Employee Stock Option (Right to buy) $ 5             10/19/1999 07/18/2009 Common Stock 2,000   2,000 D  
Employee Stock Option (Right to buy) $ 9.31             12/31/2001 05/01/2011 Common Stock 2,000   2,000 D  
Employee Stock Option (Right to buy) $ 19.0312             01/01/2000 09/30/2009 Common Stock 19,782   19,782 D  
Employee Stock Option (Right to buy) $ 19.0312             07/01/2000 09/30/2009 Common Stock 10,218   10,218 D  
Employee Stock Option (Right to buy) $ 78             01/18/2004 10/17/2010 Common Stock 1,282   1,282 D  
Employee Stock Option (Right to buy) $ 78             01/18/2001 10/17/2010 Common Stock 8,718   8,718 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Volpe Kenneth Z
25 FIRST STREET
2ND FLOOR
CAMBRIDGE, MA 02141		       SVP, Products and Technology  

Signatures

 /s/ jeffrey T. Kowalski by power of attorney   03/02/2006
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) 1. 6.25% of the Options are exercisable quarterly from the grant date.

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