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
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  McEvoy David
2. Date of Event Requiring Statement (Month/Day/Year)
04/01/2010
3. Issuer Name and Ticker or Trading Symbol
ART TECHNOLOGY GROUP INC [ARTG]
(Last)
(First)
(Middle)
ONE MAIN STREET
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
SVP & General Counsel
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

CAMBRIDGE, MA 02142
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 18,216 (1)
D
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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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 07/19/2007(2) 07/19/2017 Common Stock 70,000 $ 3 D  
Employee Stock Option 02/28/2006(2) 02/28/2016 Common Stock 20,000 $ 2.93 D  
Employee Stock Option 09/06/2005(3) 09/06/2015 Common Stock 75,000 $ 1.02 D  
Restricted Stock Units (4) 04/16/2007   (5) Common Stock 8,000 (6) $ 0 D  
Restricted Stock Units (4) 03/24/2008   (7) Common Stock 26,700 (8) $ 0 D  
Restricted Stock Units (4) 03/24/2008   (9) Common Stock 30,000 (10) $ 0 D  
Restricted Stock Units (4) 03/27/2009   (11) Common Stock 41,400 (12) $ 0 D  
Restricted Stock Units (4) 03/27/2009   (13) Common Stock 45,000 $ 0 D  
Restricted Stock Units (4) 03/27/2009   (13) Common Stock 20,000 $ 0 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
McEvoy David
ONE MAIN STREET
CAMBRIDGE, MA 02142
      SVP & General Counsel  

Signatures

/s/ Jeffrey T. Kowalski, by Power of Attorney 04/12/2010
**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) 8,684 shares of Art Technology Group, Inc. common stock were automatically withheld at vesting from a total of 26,900 vested shares to cover required tax withholdings, this disposition is exempt ftom Rule 16b-3.
(2) Options are exercisable quarterly commencing 3 months from grant date over 4 years.
(3) Options are exercisable 25% one year from grant date and 6.25% quarterly thereafter.
(4) Each restricted stock unit represents a contingent right to receive one share of Art Technology Group, Inc. common stock.
(5) The restricted stock units vest in four equal annual installments beginning May 16, 2008 for the first annual vest date, May 16, 2009 for the second annual vest, May 17, 2010 for the third annual vest and May 16, 2011 for the fourth annual vest date.
(6) Represents the remaining unvested Restricted Stock Units from the original grant of 16,000 on April 16, 2007.
(7) The number of restricted stock units that vest is determined by the performance metrics set forth in the applicable restricted stock unit agreement. Of that subset of restricted stock units that vest, the restricted stock units vest in four equal annual installments beginning March 6, 2009 for the first annual vest, May 17, 2010 for the second annual vest, March 6, 2011 for the third annual vest and March 6, 2012 for the fourth annual vest.
(8) The original grant of 40,000 restricted stock units on March 24, 2008 was reduced to 35,600 as determined by the performance metrics set forth in the applicable restriced stock unit agreement. These restricted stock units represent the remaining unvested restricted stock units from the original grant on March 24, 2008.
(9) The restricted stock units vest in four equal annual installments beginning March 6, 2009 for the first annual vest date, May 17, 2010 for the second annual vest, March 6, 2011 for the third annual vest and March 6, 2012 for the fourth annual vest date.
(10) Represents the remaining unvested Restricted Stock Units from the original grant of 40,000 on March 24, 2008.
(11) The number of restricted stock units that vest is determined by the performance metrics set forth in the applicable restricted stock unit agreement. Of that subset of restricted stock units that vest, the restricted stock units vest in four equal annual installments beginning May 17, 2010 for the first annual vest, March 6, 2011 for the second annual vest, March 6, 2012 for the third annual vest and March 6, 2013 for the fourth annual vest.
(12) The original grant of 45,000 restricted stock units on March 24, 2008 was reduced to 41,400 as determined by the performance metrics set forth in the applicable restriced stock unit agreement.
(13) The restricted stock units vest in four equal annual installments beginning May 17, 2010 for the first annual vest date,March 6, 2011 for the second annual vest, March 6, 2012 for the third annual vest and March 6, 2013 for the fourth annual vest date.

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