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 *
Clark Barry E
  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, Worldwide Sales
(Last)
(First)
(Middle)
ONE MAIN STREET
3. Date of Earliest Transaction (Month/Day/Year)
08/02/2010
(Street)

CAMBRIDGE, MA 02142
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
Common Stock (1) 08/02/2010   S   16,986 (2) D $ 3.6216 (3) 45,371 D  
Common Stock (1) 08/02/2010   S   20,775 (2) D $ 3.6139 (4) 24,596 D  
Common Stock (1) 08/02/2010   S   24,596 (2) D $ 3.6035 (5) 0 D  
Common Stock (6) 08/02/2010   M   48,116 A $ 1.26 48,116 D  
Common Stock (7) 08/02/2010   S   48,116 D $ 3.5912 (8) 0 D  
Common Stock (6) 08/02/2010   M   36,035 A $ 1.45 36,035 D  
Common Stock (7) 08/02/2010   S   36,035 D $ 3.6031 (9) 0 D  

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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 (6) $ 1.26 08/02/2010   M     48,116 01/25/2006 01/24/2015 Common Stock 100,000 $ 0 51,884 D  
Employee Stock Option (6) $ 1.45 08/02/2010   M     36,035 05/19/2005 02/18/2014 Common Stock 240,000 $ 0 203,965 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Clark Barry E
ONE MAIN STREET
CAMBRIDGE, MA 02142
      SVP, Worldwide Sales  

Signatures

 /s/ Jeffrey T. Kowalski, by Power of Attorney   08/04/2010
**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) Sale is pursuant to a 10b5-1 plan.
(2) Represents shares issued upon the vesting of restricted stock units.
(3) Represents the weighted average sale price. The highest price at which shares were sold was $3.67 and the lowest price at which the shares were sold was $3.565.
(4) Represents the weighted average sale price. The highest price at which shares were sold was $3.67 and the lowest price at which the shares were sold was $3.555.
(5) Represents the weighted average sale price. The highest price at which shares were sold was $3.665 and the lowest price at which the shares were sold was $3.55.
(6) Options exercised pursuant to a 10b5-1 plan
(7) Options sold pursuant to a 10b5-1 plan.
(8) Represents the weighted average sale price. The highest price at which shares were sold was $3.655 and the lowest price at which the shares were sold was $3.55.
(9) Represents the weighted average sale price. The highest price at which shares were sold was $3.655 and the lowest price at which the shares were sold was $3.55.

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