1. Name and Address of Reporting Person
Chung, Joseph T.
25 First St., 2nd Floor
Cambridge, MA 02141
2. Issuer Name and Ticker or Trading Symbol
Art Technology Group, Inc. (ARTG)
3. IRS or Social Security Number of Reporting Person (Voluntary)
4. Statement for Month/Day/Year
12/12/2002
5. If Amendment, Date of Original (Month/Day/Year)
6. Relationship of Reporting Person(s) to Issuer (Check all applicable)
(X) Director ( ) 10% Owner
( ) Officer (give title below) ( ) Other (specify below)
7. Individual or Joint/Group Filing (Check Applicable Line)
(X) Form filed by One Reporting Person
( ) Form filed by More than One Reporting Person
TABLE I -- Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
+------------------------------+----------+----------+---------+--------------------------+--------------+-----------+------------+
|1. Title of Security |2. Trans- |2A.Execu- |3. Trans-|4. Securities Acquired (A)|5. Amount of |6. Owner- |7. Nature |
| | action | action | action| or Disposed of (D) |Securities | ship | of In- |
| | Date | Date | Code | |Beneficially | Form: | direct |
| | | | | |Owned | Direct | Bene- |
| | (Month/ | (Month/ | | |Following | (D) or | ficial |
| | Day/ | Day/ +-----+---+-----------+---+----------+Reported | Indirect| Owner- |
| | Year) | Year) |Code |V |Amount |A/D|Price |Transaction(s)| (I) | ship |
+------------------------------+----------+----------+-----+---+-----------+---+----------+--------------+-----------+------------+
Common Stock 12/10/2002 S -6250 D $1.1944 4463432 I By Trusts
TABLE II -- Derivative Securities Acquired, Disposed of, or Beneficially Owned
+----------+--------+-------+-------+---------+-----------+---------------------+----------------+----------+-------+-------+------+
|1. |2. |3. |3A. |4. |5. |6. |7. |8. |9. |10. |11. |
| | | | | | | | | |Number |Owner- | |
| | | | | | | | | |of |ship | |
| | | | | | | | | |Deriv- |Form of| |
| | | | | | | |Title and Amount| |ative |Deriv- | |
| | | | | | | |of Underlying | |Secur- |ative |Nature|
| |Conver- |Trans- |Execu- | |Number of | |Securities | |ities |Secur- |of |
| |sion or |action |tion | |Derivative |Date Exercisable +-------+--------+ |Benefi-|ity: |In- |
| |Exercise|Date |Date | |Securities |and Expiration Date | |Amount | |cially |Direct |direct|
| |Price of| | |Transac- |Acquired(A)|(Month/Day/Year) | |or | |Owned |(D) or |Bene- |
|Title of |Deriv- |(Month/|(Month/|tion Code|Disposed(D)+----------+----------+ |Number |Price of | |In- |ficial|
|Derivative|ative | Day/ | Day/ +------+--+-----+-----+Date Exer-|Expira- | |of |Derivative| |direct |Owner-|
|Security |Security|Year) |Year) |Code |V |(A) |(D) |cisable |tion Date |Title |Shares |Security | |(I) |ship |
+----------+--------+-------+-------+------+--+-----+-----+----------+----------+-------+--------+----------+-------+-------+------+
Explanation of Responses:
SIGNATURE OF REPORTING PERSON
/s/ Joseph T. Chung
DATE
12/11/2002