Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF 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
OMB APPROVAL
OMB Number: 3235-0104
Expires: January 31, 2005
Estimated average burden hours per response... 0.5

(Print or Type Responses)
1. Name and Address of Reporting Person *
  ONEILL PATRICIA
 2. Date of Event Requiring Statement (Month/Day/Year)
01/30/2004		 3. Issuer Name and Ticker or Trading Symbol
ART TECHNOLOGY GROUP INC [ARTG]
(Last)
(First)
(Middle)
25 FIRST ST., 2ND FLOOR		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Senior VP, Human Resources
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

CAMBRIDGE, MA 02141		 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 Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock 6,380
D
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Option (right to buy) 06/27/2003(1) 03/26/2013 Common Stock 42,188 $ 0.84 D  
Employee Stock Option (right to buy) 06/27/2003(1) 03/26/2013 Common Stock 32,812 $ 0.84 D  
Employee Stock Option (right to buy) 01/25/2002(1) 10/24/2011 Common Stock 6,251 $ 1.5 D  
Employee Stock Option (right to buy) 01/25/2002(2) 10/24/2011 Common Stock 18,749 $ 1.5 D  
Employee Stock Option (right to buy) 04/30/2004(1) 01/29/2014 Common Stock 65,000 $ 1.57 D  
Employee Stock Option (right to buy) 04/30/2004(1) 01/29/2014 Common Stock 15,000 $ 1.57 D  
Employee Stock Option (right to buy) 02/03/2002(3) 08/02/2011 Common Stock 20,000 $ 2.13 D  
Employee Stock Option (right to buy) 07/21/2003(4) 07/20/2013 Common Stock 4,167 $ 2.24 D  
Employee Stock Option (right to buy) 07/21/2003(4) 07/20/2013 Common Stock 12,500 $ 2.24 D  
Employee Stock Option (right to buy) 07/09/2001(1) 04/08/2011 Common Stock 1,341 $ 4.7813 D  
Employee Stock Option (right to buy) 07/09/2001(1) 04/08/2011 Common Stock 9,159 $ 4.7813 D  
Employee Stock Option (right to buy) 12/31/2001(5) 05/01/2011 Common Stock 2,000 $ 9.31 D  
Employee Stock Option (right to buy) 05/19/2001(6) 05/18/2010 Common Stock 7,736 $ 51.6875 D  
Employee Stock Option (right to buy) 05/19/2000(7) 05/19/2010 Common Stock 42,264 $ 51.6875 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
ONEILL PATRICIA
25 FIRST ST., 2ND FLOOR
CAMBRIDGE, MA 02141		       Senior VP, Human Resources  

Signatures

Diane M. Tracey 05/10/2005
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(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) Option is exercisable at the rate of 6.25% quarterly beginning three months from grant date.
(2) Option is exercisable at the rate of 25% per quarter beginning three months from the grant date.
(3) Option is exercisable 25% six months from grant date and 12.5% quarterly thereafter.
(4) Option is exercisable 25% on the grant date and 25% every 6 months thereafter (total vested after 18 months).
(5) Options are exercisable 100% on 12/31/01.
(6) Option is exercisable 25% one year from grant date and 6.25% quarterly thereafter.
(7) Option is exercisable at the rate of 25% one year from grant date and 6.25% quarterly thereafter.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, See Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.