UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of
the Securities Exchange Act of 1934 (Amendment No. )

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o		Preliminary Proxy Statement
o		Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))
o		Definitive Proxy Statement
o		Definitive Additional Materials
þ		Soliciting Material Pursuant to §240.14a-12

ART TECHNOLOGY GROUP, INC. (Name of Registrant as Specified In Its Charter)

N/A (Name of Person(s) Filing Proxy Statement, if other than the Registrant)

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Filed by Art Technology Group, Inc.
Pursuant to Rule 14a-12 under the Securities Exchange Act of 1934
Subject Company: Art Technology Group, Inc.
Commission File No.: 000-26679