ART TECHNOLOGY GROUP INC
DEF 14A, 2000-04-14
PREPACKAGED SOFTWARE
Previous: MDU COMMUNICATIONS INTERNATIONAL INC, 10QSB/A, 2000-04-14
Next: LEK INTERNATIONAL INC, 10KSB, 2000-04-14



<PAGE>
                            SCHEDULE 14A INFORMATION

                  PROXY STATEMENT PURSUANT TO SECTION 14(A) OF
                      THE SECURITIES EXCHANGE ACT OF 1934

<TABLE>
      <S>        <C>
      FILED BY THE REGISTRANT /X/
      FILED BY A PARTY OTHER THAN THE REGISTRANT / /

      Check the appropriate box:
      / /        Preliminary Proxy Statement
      /X/        Definitive Proxy Statement
      / /        Definitive Additional Materials Soliciting Material Pursuant
                 to sec.240.14a-ll(c) or sec.240.14a-12
      / /        Confidential, for Use of the Commission Only (as permitted
                 by Rule 14a-6(e)(2))

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

      -----------------------------------------------------------------------
                    (Name of Person(s) Filing Proxy Statement)
</TABLE>

PAYMENT OF FILING FEE (CHECK THE APPROPRIATE BOX):

<TABLE>
<S>        <C>  <C>
/X/        No fee required.
/ /        Fee computed on table below per Exchange Act Rules 14a-6(i)(4)
           and 0-11.
1)         Title of each class of securities to which transaction applies:
2)         Aggregate number of securities to which transaction applies:
3)         Per unit price or other underlying value of transaction
           computed pursuant to Exchange Act Rule 0-11 (Set forth the
           amount on which the filing fee is calculated and state how it
           was determined):
4)         Proposed maximum aggregate value of transaction:
5)         Total fee paid:
/ /        Fee paid previously with preliminary materials.
/ /        Check box if any part of the fee is offset as provided by
           Exchange Act Rule 0-11(a)(2) and identify the filing for which
           the offsetting fee was paid previously. Identify the previous
           filing by registration statement number, or the Form or
           Schedule and the date of its filing.
1)         Amount Previously Paid:
2)         Form, Schedule or Registration Statement No.:
3)         Filing Party:
4)         Date Filed:
</TABLE>
<PAGE>
                           ART TECHNOLOGY GROUP, INC.
                                25 FIRST STREET
                         CAMBRIDGE, MASSACHUSETTS 02141

Dear Stockholder:

    I am pleased to invite you to attend Art Technology Group, Inc.'s 2000
Annual Meeting of Stockholders on May 19, 2000. We will hold the meeting at
10:00 a.m. at the offices of Hale and Dorr LLP, 60 State Street, 26th Floor,
Boston, Massachusetts. Annual meetings play an important role in maintaining
communications and understanding among Management, the Board of Directors and
our stockholders, and I hope that you will be able to join us.

    On the pages following this letter you will find the Notice of Annual
Meeting of Stockholders, which lists the matters to be considered at the Annual
Meeting, and the Proxy Statement, which describes the matters listed in the
Notice. In this mailing, we have also enclosed our 1999 Annual Report.

    If you are a stockholder of record, we have enclosed your Proxy Card, which
allows you to vote on these matters. Simply mark, sign, date and mail your Proxy
Card to our transfer agent, Boston EquiServe, L.P., in the enclosed postage-paid
envelope. Of course, you may attend the Annual Meeting and vote in person, even
if you have sent in a Proxy Card.

    If your shares are held in the name of a bank, broker or other holder of
record, you will receive instructions from the holder of record that you must
follow in order for your shares to be voted.

                                          Sincerely yours,
                                          Joe Chung
                                          Chief Technology Officer and
                                          Chairman of the Board of Directors

THE ABILITY TO HAVE YOUR VOTE COUNTED AT THE ANNUAL MEETING IS AN IMPORTANT
STOCKHOLDER RIGHT, AND I HOPE YOU WILL CAST YOUR VOTE IN PERSON OR BY PROXY
REGARDLESS OF THE NUMBER OF SHARES YOU HOLD.
<PAGE>
                    NOTICE OF ANNUAL MEETING OF STOCKHOLDERS

<TABLE>
<S>                             <C>
Time..........................  10:00 a.m. on Friday, May 19, 2000

Place.........................  Offices of Hale and Dorr LLP, 60 State Street, Boston,
                                Massachusetts

Items Of Business.............  (1) To elect two Class I directors to serve for the ensuing
                                three years.

                                (2) To approve an amendment to our Certificate of
                                Incorporation to increase the number of authorized shares of
                                    common stock from 100,000,000 to 500,000,000.

                                (3) To approve the continuation of and an amendment to our
                                1996 Stock Option Plan to increase the number of shares
                                    available for issuance from 6,300,000 to 9,800,000.

                                (4) To ratify the selection of Arthur Andersen LLP as our
                                    independent accountants for the fiscal year ending
                                    December 31, 2000.

                                (5) To transact such other business as may properly come
                                before the Annual Meeting and any adjournment or
                                    postponement of the Annual Meeting.

Record Date...................  You can vote if you are a stockholder of record at the close
                                of business on March 28, 2000.

Annual Report.................  We have enclosed our 1999 Annual Report, which is not a part
                                of the proxy solicitation material.

Proxy Voting..................  It is important that your shares be represented and voted at
                                the Annual Meeting. Whether or not you plan to attend the
                                Annual Meeting, please mark, sign, date and promptly mail
                                your Proxy Card to our transfer agent, Boston EquiServe,
                                L.P., in the enclosed postage-paid envelope. You may revoke
                                your proxy at any time prior to its exercise at the Annual
                                Meeting.
</TABLE>

                                          By Order of the Board of Directors
                                          Jeet Singh
                                          Secretary

Cambridge, Massachusetts
April 14, 2000
<PAGE>
                           ART TECHNOLOGY GROUP, INC.

                                25 FIRST STREET
                              CAMBRIDGE, MA 02141
             PROXY STATEMENT FOR THE ANNUAL MEETING OF STOCKHOLDERS

    The Board of Directors of Art Technology Group, Inc. is soliciting proxies
to be voted at our Annual Meeting of Stockholders and at any adjournment or
postponement of the Annual Meeting. We are delivering these proxy materials in
connection with this solicitation.

    You are invited to attend our Annual Meeting of Stockholders on Friday,
May 19, 2000, beginning at 10:00 a.m. The Annual Meeting will be held at the
offices of Hale and Dorr LLP, 60 State Street, Boston, Massachusetts.

    This Proxy Statement, Proxy Card and voting instructions are being mailed on
April 14, 2000. In addition, we are enclosing a copy of our 1999 Annual Report.

STOCKHOLDERS ENTITLED TO VOTE

    Holders of record of ATG common stock at the close of business on March 28,
2000 are entitled to receive this notice and to vote their shares at the Annual
Meeting. As of that date, there were 66,353,418 shares of common stock
outstanding. Each share of common stock is entitled to one vote on each matter
properly brought before the Annual Meeting.

    A list of stockholders entitled to vote will be available at the Annual
Meeting and for 10 days prior to the Annual Meeting, between the hours of
8:30 a.m. and 5:30 p.m., at the offices of Hale and Dorr LLP, 60 State Street,
Boston, Massachusetts, by contacting the Secretary of the Company.

PROXIES

    Your vote is important. Stockholders of record may vote their proxies by
marking, signing, dating and mailing a Proxy Card to our transfer agent, Boston
EquiServe, L.P. If you are a stockholder of record, we have enclosed a
postage-paid envelope. Stockholders whose shares are held in the name of a bank,
broker or other holder of record will receive instructions from the holder of
record explaining how your shares may be voted.

    You may revoke your proxy at any time before the vote at the Annual Meeting
by (1) written notice to the Secretary of the Company, (2) timely delivery of a
valid later-dated proxy or (3) voting by ballot at the Annual Meeting.

VOTING AT THE ANNUAL MEETING

    Returning a proxy now will in no way limit your right to vote at the Annual
Meeting if you later decide to attend in person. If your shares are held in the
name of a bank, broker or other holder of record, you must obtain a proxy,
executed in your favor, from the holder of record to be able to vote at the
Annual Meeting. All of your shares that have been properly voted by proxy and
not revoked will be voted at the Annual Meeting in accordance with your
instructions. If you sign your Proxy Card but do not give voting instructions,
the persons named as proxies will vote your shares as recommended by the Board
of Directors.

                                       1
<PAGE>
VOTING ON OTHER MATTERS

    If any other matters are properly presented at the Annual Meeting for
consideration, the persons named in the enclosed form of Proxy Card will have
the discretion to vote on those matters for you. At the date this Proxy
Statement went to press, we do not know of any other matters to be raised at the
Annual Meeting.

REQUIRED VOTE

    The necessary quorum at the Annual Meeting is the presence, in person or by
proxy, of the holders of a majority of the shares of ATG common stock that are
outstanding and entitled to vote. For purposes of determining a quorum,
abstentions and broker "nonvotes" are counted as present and entitled to vote. A
broker "nonvote" occurs when a nominee holding shares for a beneficial owner
does not vote on a particular proposal because the nominee does not have
discretionary voting power for that particular item and has not received
instructions from the beneficial owner.

    A plurality of the votes cast is required for the election of Directors,
meaning that the Director nominee with the most affirmative votes for a
particular seat is elected for that seat. Abstentions are not counted for
purposes of the election of Directors. Brokers have discretionary voting power
in the election of Directors.

    The affirmative vote of the holders of a majority of the shares present or
represented and voting at the Annual Meeting is required to approve the proposed
amendments of our Certificate of Incorporation and our 1996 Stock Option plan.

    The affirmative vote of a majority of the shares present in person or
represented by proxy at the Annual Meeting and entitled to vote on the matter is
required to ratify the selection of Arthur Andersen LLP as our independent
accountants for the fiscal year ending December 31, 2000. Abstentions are
effectively counted as votes against this ratification. Brokers have
discretionary voting power in the ratification of independent accountants.

COST OF PROXY SOLICITATION

    We will pay the expenses of soliciting proxies. Proxies may be solicited on
our behalf by Directors, officers or employees in person or by telephone,
electronic mail, facsimile transmission or by telegram. We will not pay
additional compensation to these individuals for soliciting proxies. We will
also request banks, brokers and other nominees holding shares for a beneficial
owner to forward copies of the proxy material to those beneficial owners and to
request instructions for voting those shares. We will reimburse these banks,
brokers and other nominees for their related reasonable expenses.

STOCKHOLDER ACCOUNT MAINTENANCE

    Our transfer agent is Boston EquiServe, L.P. All communications concerning
accounts of stockholders of record, including address changes, name changes,
inquiries as to requirements to transfer shares of common stock and similar
issues can be handled by calling them at 800-733-5001 or 781-575-3400 or by
contacting Boston EquiServe's website at www.equiserve.com. For other
information about ATG, stockholders can visit our website at WWW.ATG.COM.

                                       2
<PAGE>
STOCK SPLIT

    All information in this Proxy Statement has been adjusted to reflect a
two-for-one stock split effected on March 27, 2000.

THE BOARD OF DIRECTORS

    ATG is governed by a Board of Directors that presently consists of seven
Directors. During 1999, the Board met 10 times. The Board has two ongoing
committees: an Audit Committee and a Compensation Committee. During 1999, no
Director attended fewer than 75% of the total of the number of Board meetings
and the number of meetings held by committees on which the Director served.

    ATG has a standing Audit Committee of the Board of Directors, which reviews
our financial reporting and internal controls and policies, recommends the
selection of independent auditors, reviews the overall plan and scope of the
independent audit and provides the opportunity for direct contact between our
independent accountants and the Board. The Audit Committee met three times
during 1999. The current Audit Committee members are Thomas Matlack and Robert
Forlenza.

    ATG has a standing Compensation Committee of the Board of Directors which
reviews, and recommends to the Board for approval, the compensation programs for
the Chief Executive Officer, other executive officers and key employees. The
Compensation Committee also administers our bonus and incentive plans and
programs, including stock option and stock purchase plans. The Compensation
Committee took action thirteen times during 1999, either by telephonic meeting
or by means of written consent. The current members of the Compensation
Committee are Thomas Matlack, Scott Jones and Charles Lax.

COMPENSATION OF DIRECTORS

    ATG does not pay additional cash compensation to any Directors, whether or
not a Director is employed by ATG or one of its affiliates.

    MEETING FEES. ATG does not reimburse Directors for travel and living
expenses for attending regular Board meetings and committee meetings.

    REGULAR STOCK OPTIONS. The Board of Directors adopted our 1999 Outside
Director Stock Option Plan in May 1999, and it was approved by our stockholders
in June 1999. Under the plan, each of our non-employee Directors received a
non-statutory option to purchase 10,000 shares of our common stock on the
effective date of our initial public offering (July 20, 1999) at the initial
public offering price, which was $6 a share after adjustment for our recent
stock split. In addition, each non-employee director receives an option to
purchase 5,000 shares of our common stock on the date of each annual meeting of
stockholders, at an exercise price per share equal to the closing price of our
common stock on the date of the annual meeting. In addition, individuals who
become directors and are not our employees will receive an option to purchase
10,000 shares of our common stock on the date of his or her initial election to
our Board of Directors. The exercise price per share of such options will be the
closing price per share of our common stock on the date of the Director's
election. All options granted under the Director plan are fully vested upon
grant.

                                       3
<PAGE>
                             ELECTION OF DIRECTORS

    ATG's By-laws provide that the Board shall consist of at least three
Directors. From time to time, the number of Directors is determined by the Board
or at an annual meeting of stockholders. In August 1998, the number of Directors
was fixed at seven. The Board of Directors consists of three classes (designated
Class I, Class II and Class III Directors) with each class holding office for
overlapping three year terms.

    The persons named in the enclosed Proxy Card intend to vote the proxy for
the election of each of Phyllis S. Swersky and Robert F. Walters as Class I
Directors, unless you indicate on the Proxy Card that your vote should be
withheld from one or both of these nominees.

    We expect each nominee for election as a Director to be able to serve if
elected. If any nominee is not able to serve, proxies will be voted in favor of
the remainder of those nominated and may be voted for substitute nominees,
unless the Board chooses to reduce the number of Directors serving on the Board.

NOMINEES

           CLASS I DIRECTORS (TERMS TO EXPIRE AT 2003 ANNUAL MEETING)

    Phyllis S. Swersky, 48, has been President of The Meltech Group, a
consulting firm specializing in business advisory services for high-growth
potential businesses, since 1995. She was the President of The Net
Collaborative, Inc., an Internet systems integration company, from 1996 to 1997.
She served as President of Work/Family Directions, Inc., a provider of employee
benefits programs, from 1992 through 1995. Prior to 1992, she was Executive Vice
President and Chief Financial Officer of AICorp, Inc., a computer software
company. Ms. Swersky also serves as a director of Investor Financial
Services, Inc.

    Robert F. Walters, 51, has been Senior Vice President and Chief Information
Officer of the John Hancock Financial Services since 1995. Prior to Hancock,
Mr. Walters held various key positions at Citibank, both domestically and
overseas. Before joining Citibank, Mr. Walters held various senior technology
management positions at Bankers Trust Co. and Marine Midland Bank.

CONTINUING MEMBERS OF THE BOARD OF DIRECTORS

            CLASS II DIRECTORS (TERMS EXPIRE AT 2001 ANNUAL MEETING)

    Scott A. Jones, 38, has been a member of our Board of Directors since
November 1997. Since co-founding Escient, Inc., a company focusing on Internet
applications related to entertainment in the home, in July 1996, Mr. Jones has
served as its Chief Executive Officer and Chairman. After co-founding Boston
Technology, Inc. in 1986, Mr. Jones served as its Chairman and Chief Scientist
until 1992. Since 1994, he has also been a principal of Threshold
Technologies, Inc., a consulting firm, and King Air Charters, Inc., an air
charter company. Mr. Jones also serves on the board of HIE, Inc. a software
integration services company.

    Charles R. Lax, 40, has been a member of our Board of Directors since
December 1997. Since November 1997, Mr. Lax has been General Partner of SOFTBANK
Technology Ventures. From

                                       4
<PAGE>
March 1996 to November 1997, he was Vice President at SOFTBANK Holdings Inc.
Mr. Lax also serves on the boards of 1-800-Flowers.com, Inc., Global
Sports, Inc., a sports equipment company, Interliant, Inc. an Internet hosting
service company, and Webhire, Inc. a human resources staffing software company.

    Thomas N. Matlack, 34, has been a member of our Board of Directors since
November 1997. Since August 1998, he has been a Managing Partner at Megunticook
Management LLC, a private investment fund. From 1992 to February 1997, he held
various positions with the Providence Journal Company, including Chief Financial
Officer from April 1996 to February 1997, Vice President, Finance from
September 1995 to April 1996, and Director, Financial Planning and Analysis from
1992 to September 1995.

          CLASS III DIRECTORS (TERM TO EXPIRE AT 2002 ANNUAL MEETING)

    Joseph T. Chung, 35, co-founded the company with Jeet Singh in 1991 and is
our Chief Technology Officer, Treasurer and Chairman of our Board of Directors.
Previously, Mr. Chung was the technical director and chief technology designer
of the hyperinstrument group at the MIT Media Lab and held engineering positions
at Apple Computer and Digital Equipment Corporation.

    Jeet Singh, 36, co-founded the company with Joseph Chung in 1991 and is our
Chief Executive Officer and a member of our Board of Directors. Previously,
Mr. Singh held marketing positions with Boston Technology, Inc., a manufacturer
of advanced voice processing computers, Team Technologies, a Washington,
D.C.-based consulting firm specializing in workgroup productivity, and Groupe
Bull/Bull Corporation of America.

                 AMENDMENT TO INCREASE AUTHORIZED COMMON STOCK

    The Board of Directors believes that it is in ATG's best interest to amend
our Certificate of Incorporation to increase the number of shares of common
stock we are authorized to issue from 100,000,000 shares to 500,000,000 shares.
The purpose of the amendment is to provide us with additional shares of common
stock which may be made available for future financing and acquisition
transactions, stock splits, employee benefit plans, and other general corporate
purposes. We have no present commitments to issue the additional shares of
common stock for which authorization is sought other than in connection with our
stock plans (See "Amendment of 1996 Stock Option Plan--Summary of Stock Option
Plan."). If the Board believes it to be in the best interests of ATG and our
stockholders to issue additional shares of common stock in the future, the Board
will have the authority to determine the terms of the issuance and would not
seek further authorization by vote of the stockholders unless such authorization
is required by applicable law. If the Board wishes to issue additional shares of
common stock in the future, such issuance of additional shares could have a
dilutive effect on the voting power of existing holders of common stock and on
earnings per share. In addition, the proposed increase in the number of shares
of authorized common stock might deter or render more difficult a merger, tender
offer, proxy contest or an extraordinary corporate transaction opposed by our
Board.

    The Board of Directors believes that the approval of the amendment of the
Certificate of Incorporation is in the best interests of the Company and its
stockholders and therefore recommends that the stockholders vote FOR this
proposal.

                                       5
<PAGE>
             CONTINUANCE OF AND AMENDMENT TO 1996 STOCK OPTION PLAN

    Our 1996 Stock Option Plan (the "1996 Plan") currently provides for the
issuance of up to 12,600,000 shares of common stock. In February 2000, the Board
of Directors voted to (i) continue the 1996 Plan and (ii) amend the 1996 Plan,
subject to stockholder approval, to increase the number of shares authorized for
issuance thereunder by 7,000,000 shares to 19,600,000 shares of common stock.

    Section 162(m) and Continuance of the Plan. Section 162(m) of the Internal
Revenue Code of 1986, as amended, generally disallows a tax deduction to public
companies for certain compensation in excess of $1 million paid to the Company's
Chief Executive Officer and the four other most highly compensated executive
officers. Certain compensation, including qualified performance-based
compensation, will not be subject to the deduction limit if certain requirements
are met. In order for awards granted under the 1996 Plan to comply with
Section 162(m) after the Annual Meeting, the continuance of the 1996 Plan must
be approved by the stockholders. If the stockholders do not vote to continue the
1996 Plan, the Company will not make any further awards under the 1996 Plan.
Even if the stockholders do vote to continue the 1996 Plan, however, awards
granted thereunder will only be treated as qualified performance-based
compensation under Section 162(m) if the grant of such awards complies with all
other requirements of Section 162(m).

    The Board of Directors' primary reason for adopting the amendment was to
enhance our ability to attract, retain and motivate qualified employees. The
following summary of the 1996 Plan is qualified in all respects by reference to
the full text of the 1996 Plan, which is available upon request to the Secretary
of ATG.

SUMMARY OF THE 1996 PLAN

    The 1996 Plan was adopted by our Board of Directors in April 1996 and
approved by our stockholders in May 1996.

    The 1996 plan provides for the grant of incentive stock options intended to
qualify under Section 422 of the Internal Revenue Code and nonstatutory stock
options.

    Our officers, employees, Directors, consultants and advisors are eligible to
receive awards under the 1996 plan. Under present law, however, incentive stock
options may only be granted to employees. No employee may receive any award for
more than 500,000 shares in any calendar year.

    Optionees receive the right to purchase a specified number of shares of
common stock at a specified option price and subject to such other terms and
conditions as are specified in connection with the option grant. We may grant
options at an exercise price less than, equal to or greater than the fair market
value of our common stock on the date of grant. Under present law, incentive
stock options and options intended to qualify as performance-based compensation
under Section 162(m) of the Internal Revenue Code may not be granted at an
exercise price less than the fair market value of the common stock on the date
of grant or less than 110% of the fair market value in the case of incentive
stock options granted to optionees holding more than 10% of the voting power of
the company. The 1996 plan permits our Board of Directors to determine how
optionees may pay the exercise price of their options, including by cash, check
or in connection with a "cashless exercise" by surrender to us of shares of
common stock, by delivery to us of a promissory note, or by any other means
which the Board determines is consistent with the 1996 Plan and applicable rules
and regulations.

                                       6
<PAGE>
    As of March 28, 2000, approximately 380 persons were eligible to receive
awards under the 1996 plan, including five executive officers and five
non-employee Directors. The granting of options under the 1996 Plan is
discretionary and we cannot now determine the number or type of options to be
granted in the future to any particular person or group.

    Our Board of Directors administers the 1996 plan. Our Board of Directors has
the authority to adopt, amend and repeal the administrative rules, guidelines
and practices relating to the plan and to interpret its provisions. It may
delegate authority under the 1996 plan to one or more committees of the Board of
Directors. Our Board of Directors has authorized the Compensation Committee to
administer the 1996 plan, including the granting of options to our executive
officers. In addition, the Board has authorized an Employee Stock Option
Committee, consisting of our Chief Executive Officer, Jeet Singh, to grant
options under the 1996 Plan for up to 300,000 shares in any quarter. Such
Options may not cover more than 10,000 shares per employee per year and must be
within certain guidelines based on salary levels. Subject to any applicable
limitations contained in the 1996 plan, our Board of Directors, these committee
and any other committee to whom our Board of Directors delegates authority may
select the recipients of awards and determines the number of shares of common
stock covered by options, the dates upon which such options become exercisable,
the exercise price of options and the duration of options.

    In the event of a merger, liquidation or other acquisition event, our Board
of Directors is authorized to take one or more of the following actions: provide
that outstanding options be assumed or substituted for by the acquiror, provide
that all unexercised options terminate immediately prior to the event unless
exercised within a time period specified in written notice to the option holder,
in the event of a merger in which the holders of common stock would receive a
cash payment for each share surrendered, provide for a cash payment to each
option holder equal to the per share amount by which the amount paid to common
stock holders exceeds the option's exercise price, multiplied by the total
number of shares for which the option is then exercisable or provide that any or
all outstanding options become fully exercisable immediately prior to the event.

    No award may be granted under the 1996 plan after April 2006, but the
vesting and effectiveness of awards previously granted may extend beyond that
date. Our Board of Directors may at any time amend, suspend or terminate the
1996 plan, except that no award granted after an amendment of the 1996 plan and
for which stockholder approval is required under Section 422 of the Internal
Revenue Code shall become exercisable, realizable or vested, to the extent such
amendment was required to grant such award, unless and until such amendment is
approved by our stockholders.

    See Appendix A to this Proxy Statement for a discussion of the U.S. federal
income tax consequences of the 1996 Plan.

    The Board of Directors believes that each of (i) the continuance of the 1996
Plan and (ii) the approval of the amendment of the 1996 Plan is in the best
interests of the Company and its stockholders and therefore recommends that the
stockholders vote FOR this proposal.

              RATIFICATION OF SELECTION OF INDEPENDENT ACCOUNTANTS

    The Board of Directors, upon the recommendation of its Audit Committee, has
selected Arthur Andersen LLP as independent accountants for the fiscal year
ending December 31, 2000. This firm has served as our independent accountants
since 1996. Although stockholder ratification of the selection of Arthur
Andersen is not required by law, the Board of Directors believes that it is
advisable to give

                                       7
<PAGE>
stockholders the opportunity to ratify this selection. If this proposal is not
approved at the Annual Meeting, we will reconsider the selection of Arthur
Andersen.

    Representatives of Arthur Andersen will be present at the Annual Meeting to
answer appropriate questions. They will also have the opportunity to make a
statement if they desire to do so.

    The Board of Directors recommends a vote FOR the ratification of the
selection of Arthur Andersen LLP as our independent accountants for the fiscal
year ending December 31, 2000.

                        OWNERSHIP OF ATG'S COMMON STOCK

SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

    The following table sets forth certain information as of January 31, 2000,
with respect to the beneficial ownership of our Common Stock by (i) each person
known by us to own beneficially more than five percent of the outstanding shares
of Common Stock, (ii) each Director of the Company, (iii) each executive officer
of the Company named in the Summary Compensation Table set forth under the
caption "Executive Compensation" below and (iv) all Directors and executive
officers of the Company as a group. The address of each of our executive
officers is c/o Art Technology Group, Inc., 25 First Street, Cambridge,
Massachusetts 02141.

<TABLE>
<CAPTION>
                                                          NUMBER OF SHARES
                                                            BENEFICIALLY       PERCENTAGE OF COMMON
BENEFICIAL OWNER                                             OWNED (1)       STOCK OUTSTANDING (1)(2)
- ----------------                                          ----------------   ------------------------
<S>                                                       <C>                <C>
Tudor Investment Corporation (3)........................      8,736,524                13.3%
  600 Steamboat Road
  Greenwich, CT 06830
GMN Investors II LP.....................................      3,328,200                 5.1%
  20 Williams Street
  Wellesley, MA 02481
Jeet Singh (4)..........................................      6,784,000                10.3%
Joseph T. Chung (5).....................................      6,729,600                10.2%
Charles R. Lax(6).......................................      2,638,698                 4.0%
Scott A. Jones..........................................      1,900,338                 2.9%
Thomas N. Matlack.......................................        470,664                 0.7%
Phyllis S. Swersky......................................          2,200                 0.0%
Ann C. Brady (7)........................................        164,022                 0.2%
Lauren Kelley (8).......................................         92,045                 0.1%
Paul Shorthose (9)......................................        297,500                 0.4%
William Wittenberg 10)..................................        620,188                 0.9%
Robert Walters..........................................              0                 0.0%
Ian Reid................................................              0                 0.0%
All directors and executive officers as a group (12
  persons)(11)..........................................     31,763,979                48.3%
</TABLE>

- ------------------------

(1) The inclusion of any shares of common stock deemed beneficially owned does
    not constitute an admission of beneficial ownership of such shares. Unless
    otherwise indicated, each person listed above has sole voting and/or
    investment power with respect to the shares listed. Any reference in

                                       8
<PAGE>
    the footnotes below to shares subject to stock options held by the person in
    question relates only to stock options which were exercisable on, or within
    60 days after, January 31, 2000.

(2) In calculating the percent of common stock beneficially owned by each person
    or entity listed, the number of shares deemed outstanding consists of the
    65,825,194 post-split shares actually outstanding as of January 31, 2000,
    plus, for that person or entity only, any shares subject to options that
    were exercisable on, or within 60 days after, January 31, 2000.

(3) Beneficial ownership as reported in an amendment to a Schedule 13G filed
    with the Securities and Exchange Commission (the "Commission") in
    March 2000.

(4) Mr. Singh's shares are held in trust of which Mr. Singh is the sole trustee
    with sole voting and dispositive power.

(5) Mr. Chung's shares are held in trust of which Mr. Chung is the sole trustee
    with sole voting and dispositive power.

(6) Mr. Lax is General Partner of SOFTBANK Technology Ventures, an affiliate of
    SOFTBANK Ventures, Inc. and may be deemed to have beneficial ownership of
    2,628,698 shares owned by SOFTBANK. Mr. Lax disclaims such beneficial
    ownership.

(7) Includes 98,022 shares subject to stock options.

(8) Includes 63,049 shares subject to stock options.

(9) Includes 297,500 shares subject to stock options.

(10) Includes 395,188 shares subject to stock options.

(11) Includes a total of 853,759 shares subject to stock options.

EXECUTIVE OFFICERS

    ATG's executive officers are elected by the Board of Directors and hold
office until the first meeting of the Board following the annual meeting of
stockholders. Certain information about ATG's executive officers is presented
below:

    Jeet Singh, 36, co-founded the company with Joseph Chung in 1991 and is our
Chief Executive Officer and a member of our Board of Directors. Previously,
Mr. Singh held marketing positions with Boston Technology, Inc., a manufacturer
of advanced voice processing computers, Team Technologies, a Washington,
D.C.-based consulting firm specializing in workgroup productivity, and Groupe
Bull/Bull Corporation of America.

    Joseph T. Chung, 35, co-founded the company with Jeet Singh in 1991 and is
our Chief Technology Officer, Treasurer and Chairman of our Board of Directors.
Previously, Mr. Chung was the technical director and chief technology designer
of the hyperinstrument group at the MIT Media Lab and held engineering positions
at Apple Computer and Digital Equipment Corporation.

    Ann C. Brady, 36, has been Chief Financial Officer since April 1999 and Vice
President, Finance since January 1998. From May 1997 to January 1998 she was
Director of Finance. From 1992 to May 1997, Ms. Brady was head of Finance and
Accounting for HPR, Inc., a software and consulting services company,
subsequently acquired by McKesson/HBOC.

                                       9
<PAGE>
    Paul G. Shorthose, 43, has been Chief Operating Officer since June 1999 and
President since February 2000. From July 1998 to June 1999, he was Vice
President of Marketing and Business Development for Context Integration, Inc., a
software-related consulting services company. From August 1997 to July 1998,
Mr. Shorthose served as our Vice President, Worldwide Services. From April 1992
to August 1997, Mr. Shorthose was Vice President/General Manager for the
Northeast U.S. and Canada Professional Services Organization of Sybase, Inc., a
software and consulting services company.

    William Wittenberg, 41, has been Senior Vice President, Product Development
since March 1998. From April 1996 to March 1998, he was Vice President,
Engineering. From 1991 to January 1995, Mr. Wittenberg was Director of Product
Management and User Interface Design for Lotus Development Corporation.

    Lauren J. Kelly, 40, has been Senior Vice President, Worldwide Sales since
February 2000. From December 1996 to February 2000, she was Vice President,
Sales. From September 1996 to December 1996, she worked as a consultant to the
company on the European market. From July 1995 to December 1996, Ms. Kelly was a
sales and marketing consultant with TechConnect Strategies, Inc., an
international business development firm. From January 1994 to July 1995,
Ms. Kelly was General Manager at Borland International in Paris, France.

    Ian Reid, 47, has been Vice President, Marketing since March 24, 2000. From
November 1998 to March, 2000 he was an independent marketing consultant for
internet industry companies. From May 1996 to October 1998, he was Vice
President, Field and Channel Marketing for Open Market, Inc., an internet
e-commerce company. From 1992 to 1996, Mr. Reid was Vice President, Marketing
for Advanced Visual Systems Inc., a visualization software company.

                                       10
<PAGE>
                             EXECUTIVE COMPENSATION

SUMMARY COMPENSATION TABLE

    The following table shows certain information for each of the last three
fiscal years regarding the compensation paid to our Chief Executive Officer and
each of our four other most highly compensated executive officers (collectively,
"Named Executive Officers").

<TABLE>
<CAPTION>
                                                                                        LONG-TERM
                                                                                       COMPENSATION
                                                                                          SHARES
                                                                                        UNDERLYING
                                                                                         OPTIONS
NAME AND PRINCIPAL POSITION                         YEAR     SALARY ($)   BONUS ($)      GRANTED
- ---------------------------                       --------   ----------   ---------   --------------
<S>                                               <C>        <C>          <C>         <C>
Jeet Singh......................................    1999      150,000        80,000            --
Chief Executive Officer                             1998      150,000         3,038(1)          --
                                                    1997      148,585            --            --

Joseph T. Chung.................................    1999      150,000        80,000
Chief Technology Officer                            1998      150,000            --
                                                    1997      144,340            --

Paul Shorthose(2)...............................    1999       92,769        55,000     1,149,998
President and Chief                                 1998       88,846        60,000            --
Operating Officer                                   1997       45,769        20,000       303,000

Ann C. Brady....................................    1999      131,560            --       289,998
Vice President, Finance                             1998      125,000            --       124,500
and Chief Financial Officer                         1997       65,414            --       141,000

William Wittenberg..............................    1999      148,462            --       180,000
Senior Vice President,                              1998      138,846            --       181,860
Product Development                                 1997      130,861            --         3,600

Lauren J. Kelley................................    1999      120,000       237,021       150,000
Senior Vice President,                              1998      120,000       149,610        70,800
Worldwide Sales                                     1997      120,716            --        33,000
</TABLE>

- ------------------------

(1) Represents imputed interest on an interest-free loan extended to Mr. Singh.

(2) Mr. Shorthose resigned as our Vice President, Services in August 1998 and
    rejoined the Company as Chief Operating Officer in June 1999.

                                       11
<PAGE>
               TOTAL OPTION EXERCISES IN 1999 AND YEAR-END VALUES

    The following table shows information regarding options exercised in 1999 by
the Named Executive Officers and the value (stock price less exercise price) of
the remaining options held by those executive officers at year end, using the
closing price ($128.125) of our common stock on December 31, 1999.

<TABLE>
<CAPTION>
                                                                                              VALUE OF UNEXERCISED IN-
                                                                  NUMBER OF UNEXERCISED         THE-MONEY OPTIONS AT
                                                                   OPTIONS AT 12/31/99                12/31/99
                                    SHARES                     ---------------------------   ---------------------------
                                 ACQUIRED ON       VALUE                                     EXERCISABLE   UNEXERCISABLE
NAME                             EXERCISE (#)   REALIZED ($)   EXERCISABLE   UNEXERCISABLE       ($)            ($)
- ----                             ------------   ------------   -----------   -------------   -----------   -------------
<S>                              <C>            <C>            <C>           <C>             <C>           <C>
Jeet Singh.....................         --              --            --             --              --              --
Joseph T Chung.................         --              --            --             --              --              --
Paul G. Shorthose..............     40,000       1,170,000       235,000        875,000      13,879,688      51,679,688
Ann C. Brady...................    102,096       1,532,756        65,834        362,064       4,188,845      22,238,110
William Wittenberg.............    334,272       2,612,775       319,938        251,250      20,415,935      15,944,016
Lauren Kelley..................     36,994         660,901        38,298        328,502       2,413,423      12,993,002
</TABLE>

                             OPTION GRANTS IN 1999

    The following table shows all options to purchase our common stock granted
in 1999 to our Named Executive Officers, and the potential value of such grants
based on potential realizable value at certain assumed rates of appreciation.
This method of valuation is required to be disclosed by SEC rules, and is not
meant to forecast possible future appreciation in our stock price.

<TABLE>
<CAPTION>
                                NUMBER OF     PERCENTAGE OF
                                SECURITIES    TOTAL OPTIONS                                POTENTIAL REALIZABLE VALUE AT
                                UNDERLYING     GRANTED TO                                  ASSUMED ANNUAL RATES OF STOCK
                                 OPTIONS     EMPLOYEES IN FY   EXERCISE                    PRICE APPRECIATION FOR OPTION
                                 GRANTED          1999         PRICE PER   EXPIRATION   -----------------------------------
NAME                             (1) (#)           (2)           SHARE        DATE         0%          5%           10%
- ----                            ----------   ---------------   ---------   ----------   --------   ----------   -----------
<S>                             <C>          <C>               <C>         <C>          <C>        <C>          <C>
Paul G. Shorthose............    100,000           2.05%        $ 5.00     06/21/2009   $      0   $  314,447   $   796,871
                                 900,000          18.48%        $ 5.00     06/21/2009   $      0   $2,830,026   $ 7,171,841
                                 150,000(3)        3.08%        $ 5.00     06/21/2009   $      0   $  471,671   $ 1,195,307

William Wittenberg...........     45,000           0.92%        $ 1.00     01/26/2009   $      0   $   28,300   $    71,718
                                 135,000           2.77%        $ 1.00     01/26/2009   $      0   $   84,901   $   215,155

Ann C. Brady.................     60,000           1.23%        $ 1.33     02/24/2009   $      0   $   50,312   $   127,499
                                  87,704           1.80%        $ 4.00     04/29/2009   $      0   $  220,626   $   559,110
                                  16,030           0.33%        $ 4.00     04/29/2009   $      0   $   40,325   $   102,191
                                  76,264           1.57%        $ 4.00     04/29/2009   $      0   $  191,848   $   486,181
                                  12,500           0.26%        $ 5.00     07/18/2009   $      0   $   39,306   $    99,609
                                  37,500           0.77%        $ 5.00     07/18/2009   $      0   $  117,918   $   298,827

Joseph T. Chung..............          0           0.00%           N/A           N/A         N/A          N/A           N/A

Jeet Singh...................          0           0.00%           N/A           N/A         N/A          N/A           N/A

Lauren J. Kelley.............    150,000           3.08%        $ 1.33     02/24/2009   $      0   $  125,779   $   318,748
                                   4,250           0.09%        $52.50     12/21/2009   $ 15,141   $  164,985   $   394,875
                                 145,750           2.99%        $52.50     12/21/2009   $519,234   $5,658,001   $13,541,878
</TABLE>

- ------------------------------
(1) Unless otherwise noted, options vest quarterly at the rate of 6.25% per
    quarter over a four year period beginning 3 months after the date of Grant.

(2) Based on Grants to employees in 1999 to purchase an aggregate of 4,869,458
    post-split shares of common stock.

(3) These options vested immediately upon grant and were granted outside the
    1996 Plan.

                                       12
<PAGE>
COMPENSATION COMMITTEE REPORT

    The Compensation Committee consists entirely of Directors who are not
officers or employees of ATG or its affiliates. The Committee establishes the
salaries and other compensation of ATG's executive officers, including its Chief
Executive Officer and the other Named Executive Officers. The Committee also
administers ATG's 1996 Stock Option Plan.

    General Compensation Philosophy. The Company's executive compensation
program is designed to:

    - retain executive officers by paying them competitively, motivate them to
      contribute to the Company's success and reward them for their performance;

    - link a substantial part of each executive officer's compensation to the
      performance of both the Company and the individual executive officer; and

    - encourage ownership of ATG common stock by executive officers, to further
      tie the interests of management to the interests of ATG stockholders.

    The Committee applies these principles to determine annual compensation
opportunities and payments for the Named Executive Officers and ATG's other
executive officers.

    Establishing Total Compensation Opportunities. In determining total annual
compensation opportunities for the Named Executive Officers, the Committee
considers many factors including:

    - the experience and compensation history of the executive officer;

    - the Company's performance as measured by revenues, earnings and total
      stockholder return compared to that of the Peer Group; and

    - the total annual compensation paid by competitors in the Internet software
      industry to their senior management.

    Balancing The Elements Of Compensation. The Committee's compensation program
is intended to balance three elements--salaries, bonuses and stock options. The
Committee also tries to align the compensation opportunities of executive
officers closely with the interests of ATG's stockholders in allocating
compensation opportunities among these elements. Therefore, bonuses are tied to
ATG's performance, as measured by revenues and earnings. The Committee also
relies on recommendations made by the executive compensation specialists at our
accounting firm.

    Salaries for each of the Named Executive Officers are based on the
Committee's evaluation of:

    - the executive officer's job performance;

    - the executive officer's contribution to the Company's growth and
      profitability;

    - any increase in the executive officer's responsibilities, whether as a
      result of the Company's growth and other factors or a reassignment of
      responsibilities among members of the management team;

    - the success of the management team in achieving the Company's short-term
      and long-term goals;

    - the importance of the executive officer to the future growth and
      profitability of the Company;

    - the salaries and total compensation mix paid to executive officers holding
      equivalent positions by companies in our peer group; and

    - the experience and compensation history of the executive officer.

                                       13
<PAGE>
    To determine the size of the grants to ATG's executive officers, we rely on
recommendations made by the executive compensation specialists of our accounting
firm. The exercise price for all stock options granted to executive officers
equals the market value of the underlying shares on the date of grant.
Therefore, ultimately, the stock options have value only if the value of the
underlying shares increases.

    Section 162(m) of the Internal Revenue Code generally disallows a tax
deduction available to the Company for compensation exceeding $1 million paid to
the Company's CEO and four other most highly compensated officers. However, the
limit does not apply to compensation paid upon Company attainment of performance
goals under a program approved by the stockholders. The Committee intends that
compensation attributable to stock options granted under the 1996 Plan meet the
requirements of Section 162(m), and therefore believes that these amounts will
be deductible by the Company for federal income tax purposes.

    As our Chief Executive Officer for 1999, Jeet Singh received salary
compensation of $150,000. Mr. Singh did not receive any bonus compensation for
1999.

BY THE COMPENSATION COMMITTEE

Thomas Matlack, Chairman
Scott Jones
Charles Lax

COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION

    During 1999, the following individuals served on the Compensation Committee:
Thomas Matlack, Scott Jones, and Charles Lax. None of these Directors was,
during or before 1999, an officer or employee of ATG or any of our affiliates.
During 1998, Mr. Matlack had a consulting agreement with ATG under which he
provided financial and strategic planning advice.

    SEC rules require disclosure of "interlocks," that is, certain circumstances
where an officer of ATG might serve as a director or member of the compensation
committee of another company, while an officer of that other company serves as a
Director of ATG or member of our Compensation Committee. During 1999, ATG had no
interlocks with other companies.

SECTION 16 BENEFICIAL OWNERSHIP REPORTING COMPLIANCE

    Section 16(a) of the Securities Exchange Act of 1934, as amended, requires
our Directors and executive officers to file reports of holdings and
transactions in ATG common stock with the Securities and Exchange Commission.
Based on our records and other information, we believe that in 1999 our
Directors and executive officers met all applicable SEC filings requirements
under Section 16(a), with the following exceptions. Ann Brady, Chief Financial
Officer of ATG, inadvertently failed to file on a timely basis a report on
Form 4 with respect to one transaction. Scott Jones, a Director of ATG,
inadvertently failed to file on a timely basis a report on Form 4 with respect
to one transaction. These transactions were subsequently reported.

                                       14
<PAGE>
STOCK PERFORMANCE GRAPH

    The following graph compares the cumulative total stockholder return on our
common stock during the period from July 21, 1999 (the date on which our common
stock became registered under Section 12 of the Securities Act of 1933, as
amended) to December 31, 1999 with the cumulative total return of (i) the Nasdaq
National Market Index and (ii) a Peer Group Index* over the same period. This
comparison assumes the investment of $100 on July 21, 1999 in the Company's
Common Stock, the Nasdaq National Market Index and the Peer Group Index and
assumes dividends, if any, are reinvested.

EDGAR REPRESENTATION OF DATA POINTS USED IN PRINTED GRAPHIC

<TABLE>
<CAPTION>
DOLLARS
<S>                         <C>      <C>      <C>      <C>      <C>       <C>       <C>
                            7/21/99  7/30/99  8/31/99  9/30/99  10/29/99  11/30/99  12/31/99
ART TECHNOLOGY GROUP, INC.   100.00    94.81   110.73   210.73    298.96    348.79    719.72
INTERNET SOFTWARE AND SVCS   100.00   100.00   105.09   118.68    123.45    158.47    200.34
NASDAQ MARKET INDEX          100.00   100.00   103.43   103.58    111.60    124.81    152.59
</TABLE>

REQUIREMENTS, INCLUDING DEADLINES, FOR SUBMISSION OF PROXY PROPOSALS, NOMINATION
OF DIRECTORS AND OTHER BUSINESS OF STOCKHOLDERS

    Stockholder proposals intended to be presented at ATG's 2001 Annual Meeting
of Stockholders must be received by us at our principal executive offices by
December 5, 2000 for inclusion in the proxy statement and form of proxy relating
to that meeting.

    Under our By-laws, a stockholder must follow certain procedures to nominate
one or more individuals for election as a Director or to introduce an item of
business at an annual meeting of stockholders. These procedures provide that any
nomination or proposed item of business must be

- ------------------------

Note: Base price date is 7/21/1999

*   Peer Group Index reflects the stock performance of the 135 publicly
    tradedcompanies which comprise the SIC Code Index 852 (Internet Software and
    Services).

                                       15
<PAGE>
submitted in writing to the Secretary of ATG at 25 First Street, Cambridge,
Massachusetts 02141. The nomination or proposed item of business must be
received not less than 60 days nor more than 90 days prior to the 2001 Meeting
and include the name and address of the stockholder proposing such nomination or
item of business and the number of shares of common stock owned by such
stockholder.

    A nomination must contain the following information about the nominee:

    - name, age, business and, if known, residence address;

    - principal occupation or employment;

    - the number of shares of ATG's common stock, if any, held by the nominee;
      and

    - the information that would be required under SEC rules in a proxy
      statement soliciting proxies for the election of such nominee as a
      director.

Notice of a proposed item of business must include:

    - a brief description of the substance of, and the reasons for, conducting
      such business at the annual meeting; and

    - any material interest of the stockholder in such business.

    We have not yet set a date for our 2001 meeting. However, if the 2001
meeting is held on May 19, 2000 (the anniversary of the 2000 meeting), the
deadline for delivery of a stockholder proposal or nomination is expected to be
March 21, 2001.

    The Board is not aware of any matters that are expected to come before the
Annual Meeting other than those referred to in this Proxy Statement. If any
other matter should properly come before the Annual Meeting, the persons named
in the accompanying Proxy Card intend to vote the proxies in accordance with
their best judgment.

    The chairman of the meeting may refuse to allow the transaction of any
business not presented beforehand, or to acknowledge the nomination of any
person not made, in compliance with the above procedures.

    Whether or not you plan to attend the Annual Meeting, please vote by
marking, signing, dating and promptly mailing your Proxy Card to our transfer
agent, Boston EquiServe, L.P., in the enclosed envelope. No postage is required
for mailing in the United States.

                                          By order of the Board of Directors,
                                          Jeet Singh
                                          Secretary

    April 14, 2000

                                       16
<PAGE>
                                   APPENDIX A

                        FEDERAL INCOME TAX CONSEQUENCES
                         OF THE 1996 STOCK OPTION PLAN

    The following is a summary of the United States federal income tax
consequences that generally will arise with respect to Awards granted under the
1996 Plan, and with respect to the sale of Common Stock acquired thereunder.

    INCENTIVE STOCK OPTIONS.  In general, a participant will not recognize
taxable income upon the grant or exercise of an incentive stock option. Instead,
a participant will recognize taxable income with respect to an incentive stock
option only upon the sale of Common Stock acquired through the exercise of the
option ("ISO Stock"). The exercise of an incentive stock option, however, may
subject the participant to the alternative minimum tax.

    Generally, the tax consequences of selling ISO Stock will vary with the
length of time that the participant has owned the ISO Stock at the time it is
sold. If the participant sells ISO Stock after having owned it for at least two
years from the date the option was granted (the "Grant Date") and one year from
the date the option was exercised (the "Exercise Date"), then the participant
will recognize long-term capital gain in an amount equal to the excess of the
sale price of the ISO Stock over the exercise price.

    If the participant sells ISO Stock for more than the exercise price prior to
having owned it for at least two years from the Grant Date and one year from the
Exercise Date (a "Disqualifying Disposition"), then all or a portion of the gain
recognized by the participant will be ordinary compensation income and the
remaining gain, if any, will be a capital gain. This capital gain will be a
long-term capital gain if the participant has held the ISO Stock for more than
one year prior to the date of the sale.

    If a participant sells ISO Stock for less than the exercise price, then the
participant will recognize capital loss equal to the excess of the exercise
price over the sale price of the ISO Stock. This capital loss will be a
long-term capital loss if the participant has held the ISO Stock for more than
one year prior to the date of the sale.

    NON-STATUTORY OPTIONS.  As in the case of an incentive stock option, a
participant will not recognize taxable income upon the grant of a non-statutory
option. However, a participant generally will recognize ordinary compensation
income upon the exercise of a non-statutory option in an amount equal to the
excess of the fair market value of the Common Stock acquired through the
exercise of the option (the "NSO Stock") on the Exercise Date over the exercise
price.

    A participant will have a tax basis for any NSO Stock equal to the exercise
price plus any income recognized upon the exercise of the option. Upon selling
NSO Stock, a participant generally will recognize capital gain or loss in an
amount equal to the difference between the sale price of the NSO Stock and the
participant's tax basis in the NSO Stock. This capital gain or loss will be a
long-term capital gain or loss if the participant has held the NSO Stock for
more than one year prior to the date of the sale.

    RESTRICTED STOCK. A participant will not recognize taxable income upon the
grant of a restricted stock award unless the participant makes an election under
Section 83(b) of the Internal Revenue Code

                                       17
<PAGE>
(a "Section 83(b) Election"). If the participant makes a Section 83(b) Election
within 30 days of the date of the grant, then the participant will recognize
ordinary compensation income, for the year in which the award is granted, in an
amount equal to the difference between the fair market value of the Common Stock
at the time the award is granted and the purchase price paid for the Common
Stock. If a Section 83(b) Election is not made, then the participant will
recognize ordinary compensation income at the time that the forfeiture
provisions or restrictions on transfer lapse in an amount equal to the
difference between the fair market value of the Common Stock at the time of such
lapse and the original purchase price paid for the Common Stock. The participant
will have a tax basis in the Common Stock acquired equal to the sum of the price
paid and the amount of ordinary compensation income recognized.

    Upon the disposition of the Common Stock acquired pursuant to a restricted
stock award, the participant will recognize a capital gain or loss equal to the
difference between the sale price of the Common Stock and the participant's tax
basis in the Common Stock. The gain or loss will be a long-term gain or loss if
the shares are held for more than one year. For this purpose, the holding period
shall begin just after the date on which the forfeiture provisions or
restrictions lapse if a Section 83(b) Election is not made, or just after the
award is granted if a Section 83(b) Election is made.

    OTHER STOCK-BASED AWARDS.  The tax consequences associated with any other
stock-based award granted under the 1996 Plan will vary depending on the
specific terms of such award. Among the relevant factors are whether or not the
award has a readily ascertainable fair market value, whether or not the award is
subject to forfeiture provisions or restrictions on transfer, the nature of the
property to be received by the participant under the award, the participant's
applicable holding period and the participant's tax basis.

    TAX CONSEQUENCES TO THE COMPANY.  The grant of an Award under the 1996 Plan
will have no tax consequences to the Company. Moreover, in general, neither the
exercise of an incentive stock option acquired under the 1996 Plan nor the sale
of any Common Stock acquired under the 1996 Plan, will have any tax consequences
to the Company. However, the Company generally will be entitled to a
business-expense deduction with respect to any ordinary compensation income
recognized by a participant under the 1996 Plan, including in connection with a
restricted stock award or as a result of the exercise of a non-statutory stock
option, a Disqualifying Disposition. Any such deduction will be subject to the
limitations of Section 162(m) of the Internal Revenue Code.

                                       18
<PAGE>
                           ART TECHNOLOGY GROUP, INC.
                             1996 STOCK OPTION PLAN

                                   April 25, 1996

1. PURPOSE.

    The purpose of this plan (the "Plan") is to secure for ART TECHNOLOGY
GROUP, INC. (the "Company") and its shareholders the benefits arising from
capital stock ownership by employees, officers and directors of, and consultants
or advisors to, the Company and its parent and subsidiary corporations who are
expected to contribute to the Company's future growth and success. Except where
the context otherwise requires, the term "Company" shall include the parent and
all present and future subsidiaries of the Company as defined in Sections 424(e)
and 424(f) of the Internal Revenue Code of 1986, as amended or replaced from
time to time (the "Code"). Those provisions of the Plan which make express
reference to Section 422 shall apply only to Incentive Stock Options (as that
term is defined in the Plan).

2. TYPE OF OPTIONS AND ADMINISTRATION.

    (a) TYPES OF OPTIONS. Options granted pursuant to the Plan may be either
incentive stock options ("Incentive Stock Options") meeting the requirements of
Section 422 of the Code or Non-Statutory Options which are not intended to meet
the requirements of Section 422 of the Code ("Non-Statutory Options").

    (b) ADMINISTRATION.

        (i) The Plan will be administered by the Board of Directors of the
    Company, whose construction and interpretation of the terms and provisions
    of the Plan shall be final and conclusive. The Board of Directors may in its
    sole discretion grant options to purchase shares of the Company's Common
    Stock ("Common Stock") and issue shares upon exercise of such options as
    provided in the Plan. The Board shall have authority, subject to the express
    provisions of the Plan, to construe the respective option agreements and the
    Plan, to prescribe, amend and rescind rules and regulations relating to the
    Plan, to determine the terms and provisions of the respective option
    agreements, which need not be identical, and to make all other
    determinations which are, in the judgment of the Board of Directors,
    necessary or desirable for the administration of the Plan. The Board of
    Directors may correct any defect, supply any omission or reconcile any
    inconsistency in the Plan or in any option agreement in the manner and to
    the extent it shall deem expedient to carry the Plan into effect and it
    shall be the sole and final judge of such expediency. No director or person
    acting pursuant to authority delegated by the Board of Directors shall be
    liable for any action or determination under the Plan made in good faith.

        (ii) The Board of Directors may, to the full extent permitted by or
    consistent with applicable laws or regulations and Section 3(b) of this Plan
    delegate any or all of its powers under the Plan to a committee (the
    "Committee") appointed by the Board of Directors, and if the Committee is so
    appointed all references to the Board of Directors in the Plan shall mean
    and relate to such Committee.

    (c) APPLICABILITY OF RULE 16B-3. Those provisions of the Plan which make
express reference to Rule 16b-3 promulgated under the Securities Exchange Act of
1934 (the "Exchange Act"), or any successor rule ("Rule 16b-3"), or which are
required in order for certain option transactions to qualify

                                       19
<PAGE>
for exemption under Rule 16b-3, shall apply only to such persons as are required
to file reports under Section 16(a) of the Exchange Act (a "Reporting Person").

3. ELIGIBILITY.

    (a) GENERAL. Options may be granted to persons who are, at the time of
grant, employees, officers or directors of, or consultants or advisors to, the
Company; provided, that the class of employees to whom Incentive Stock Options
may be granted shall be limited to all employees of the Company. A person who
has been granted an option may, if he or she is otherwise eligible, be granted
additional options if the Board of Directors shall so determine. Subject to
adjustment as provided in Section 15 below, the maximum number of shares with
respect to which options may be granted to any employee under the Plan shall not
exceed 500,000 shares of Common Stock during any calendar year. For the purpose
of calculating such maximum number, (a) an option shall continue to be treated
as outstanding notwithstanding its repricing, cancellation or expiration and
(b) the repricing of an outstanding option or the issuance of a new option in
substitution for a cancelled option shall be deemed to constitute the grant of a
new additional option separate from the original grant of the option that is
repriced or cancelled.

    (b) GRANT OF OPTIONS TO DIRECTORS AND OFFICERS. From and after the
registration of the Common Stock of the Company under the Exchange Act, the
selection of a director or an officer (as the terms "director" and "officer" are
defined for purposes of Rule 16b-3) as a recipient of an option, the timing of
the option grant, the exercise price of the option and the number of shares
subject to the option shall be determined either (i) by the Board of Directors,
of which all members shall be "disinterested persons" (as hereinafter defined),
or (ii) by two or more directors having full authority to act in the matter,
each of whom shall be a "disinterested person." For the purposes of the Plan, a
director shall be deemed to be a "disinterested person" only if such person
qualifies as a "disinterested person" within the meaning of Rule 16b-3, as such
term is interpreted from time to time.

4. STOCK SUBJECT TO PLAN.

    Subject to adjustment as provided in Section 15 below, the maximum number of
shares of Common Stock which may be issued and sold under the Plan is 2,000,000
shares. If an option granted under the Plan shall expire or terminate for any
reason without having been exercised in full, the unpurchased shares subject to
such option shall again be available for subsequent option grants under the
Plan. If shares issued upon exercise of an option under the Plan are tendered to
the Company in payment of the exercise price of an option granted under the
Plan, such tendered shares shall again be available for subsequent option grants
under the Plan; provided, that in no event shall such shares be made available
for issuance to Reporting Persons or pursuant to exercise of Incentive Stock
Options.

5. FORMS OF OPTION AGREEMENTS.

    As a condition to the grant of an option under the Plan, each recipient of
an option shall execute an option agreement in such form not inconsistent with
the Plan as may be approved by the Board of Directors. Such option agreements
may differ among recipients.

6. PURCHASE PRICE.

    (a) GENERAL. Subject to Section 3(b), the purchase price per share of stock
deliverable upon the exercise of an option shall be determined by the Board of
Directors, provided, however, that in the case of an Incentive Stock Option, the
exercise price shall not be less than 100% of the fair market

                                       20
<PAGE>
value of such stock, as determined by the Board of Directors, at the time of
grant of such option, or less than 110% of such fair market value in the case of
options described in Section 11(b).

    (b) PAYMENT OF PURCHASE PRICE. Options granted under the Plan may provide
for the payment of the exercise price by delivery of cash or a check to the
order of the Company in an amount equal to the exercise price of such options,
or, to the extent provided in the applicable option agreement, (i) by delivery
to the Company of shares of Common Stock of the Company already owned by the
optionee having a fair market value equal in amount to the exercise price of the
options being exercised or (ii) by any other means (including, without
limitation, by delivery of a promissory note of the optionee payable on such
terms as are specified by the Board of Directors) which the Board of Directors
determines are consistent with the purpose of the Plan and with applicable laws
and regulations (including, without limitation, the provisions of Regulation T
promulgated by the Federal Reserve Board). The fair market value of any shares
of the Company's Common Stock or other non-cash consideration which may be
delivered upon exercise of an option shall be determined by the Board of
Directors.

7. OPTION PERIOD.

    Each option and all rights thereunder shall expire on such date as shall be
set forth in the applicable option agreement, except that, in the case of an
Incentive Stock Option, such date shall not be later than ten years after the
date on which the option is granted and, in all cases, options shall be subject
to earlier termination as provided in the Plan.

8. EXERCISE OF OPTIONS.

    Each option granted under the Plan shall be exercisable either in full or in
installments at such time or times and during such period as shall be set forth
in the agreement evidencing such option, subject to the provisions of the Plan.

9. NONTRANSFERABILITY OF OPTIONS.

    Options shall not be assignable or transferable by the person to whom they
are granted, either voluntarily or by operation of law, except by will or the
laws of descent and distribution, and, during the life of the optionee, shall be
exercisable only by the optionee; provided, however, that Non-Statutory Options
may be transferred pursuant to a qualified domestic relations order (as defined
in Rule 16b-3).

10. EFFECT OF TERMINATION OF EMPLOYMENT OR OTHER RELATIONSHIP.

    Except as provided in Section 11(d) with respect to Incentive Stock Options,
and subject to the provisions of the Plan, the Board of Directors shall
determine the period of time during which an optionee may exercise an option
following (i) the termination of the optionee's employment or other relationship
with the Company or (ii) the death or disability of the optionee. Such periods
shall be set forth in the agreement evidencing such option.

11. INCENTIVE STOCK OPTIONS.

    Options granted under the Plan which are intended to be Incentive Stock
Options shall be subject to the following additional terms and conditions:

    (a) EXPRESS DESIGNATION. All Incentive Stock Options granted under the Plan
shall, at the time of grant, be specifically designated as such in the option
agreement covering such Incentive Stock Options.

                                       21
<PAGE>
    (b) 10% SHAREHOLDER. If any employee to whom an Incentive Stock Option is to
be granted under the Plan is, at the time of the grant of such option, the owner
of stock possessing more than 10% of the total combined voting power of all
classes of stock of the Company (after taking into account the attribution of
stock ownership rules of Section 424(d) of the Code), then the following special
provisions shall be applicable to the Incentive Stock Option granted to such
individual:

        (i) The purchase price per share of the Common Stock subject to such
    Incentive Stock Option shall not be less than 110% of the fair market value
    of one share of Common Stock at the time of grant; and

        (ii) the option exercise period shall not exceed five years from the
    date of grant.

    (c) DOLLAR LIMITATION. For so long as the Code shall so provide, options
granted to any employee under the Plan (and any other incentive stock option
plans of the Company) which are intended to constitute Incentive Stock Options
shall not constitute Incentive Stock Options to the extent that such options, in
the aggregate, become exercisable for the first time in any one calendar year
for shares of Common Stock with an aggregate fair market value (determined as of
the respective date or dates of grant) of more than $100,000.

    (d) TERMINATION OF EMPLOYMENT, DEATH OR DISABILITY. No Incentive Stock
Option may be exercised unless, at the time of such exercise, the optionee is,
and has been continuously since the date of grant of his or her option, employed
by the Company, except that:

        (i) an Incentive Stock Option may be exercised within the period of
    three months after the date the optionee ceases to be an employee of the
    Company (or within such lesser period as may be specified in the applicable
    option agreement), PROVIDED, that the agreement with respect to such option
    may designate a longer exercise period and that the exercise after such
    three-month period shall be treated as the exercise of a non-statutory
    option under the Plan;

        (ii) if the optionee dies while in the employ of the Company, or within
    three months after the optionee ceases to be such an employee, the Incentive
    Stock Option may be exercised by the person to whom it is transferred by
    will or the laws of descent and distribution within the period of one year
    after the date of death (or within such lesser period as may be specified in
    the applicable option agreement); and

        (iii) if the optionee becomes disabled (within the meaning of
    Section 22(e)(3) of the Code or any successor provision thereto) while in
    the employ of the Company, the Incentive Stock Option may be exercised
    within the period of one year after the date the optionee ceases to be such
    an employee because of such disability (or within such lesser period as may
    be specified in the applicable option agreement).

For all purposes of the Plan and any option granted hereunder, "employment"
shall be defined in accordance with the provisions of Section 1.421-7(h) of the
Income Tax Regulations (or any successor regulations). Notwithstanding the
foregoing provisions, no Incentive Stock Option may be exercised after its
expiration date.

12. ADDITIONAL PROVISIONS.

    (a) ADDITIONAL OPTION PROVISIONS. The Board of Directors may, in its sole
discretion, include additional provisions in option agreements covering options
granted under the Plan, including without limitation restrictions on transfer,
repurchase rights, commitments to pay cash bonuses, to make,

                                       22
<PAGE>
arrange for or guaranty loans or to transfer other property to optionees upon
exercise of options, or such other provisions as shall be determined by the
Board of Directors; provided that such additional provisions shall not be
inconsistent with any other term or condition of the Plan and such additional
provisions shall not cause any Incentive Stock Option granted under the Plan to
fail to qualify as an Incentive Stock Option within the meaning of Section 422
of the Code.

    (b) ACCELERATION, EXTENSION, ETC. The Board of Directors may, in its sole
discretion, (i) accelerate the date or dates on which all or any particular
option or options granted under the Plan may be exercised or (ii) extend the
dates during which all, or any particular, option or options granted under the
Plan may be exercised.

13. GENERAL RESTRICTIONS.

    (a) INVESTMENT REPRESENTATIONS. The Company may require any person to whom
an option is granted, as a condition of exercising such option, to give written
assurances in substance and form satisfactory to the Company to the effect that
such person is acquiring the Common Stock subject to the option for his or her
own account for investment and not with any present intention of selling or
otherwise distributing the same, and to such other effects as the Company deems
necessary or appropriate in order to comply with federal and applicable state
securities laws, or with covenants or representations made by the Company in
connection with any public offering of its Common Stock.

    (b) COMPLIANCE WITH SECURITIES LAWS. Each option shall be subject to the
requirement that if, at any time, counsel to the Company shall determine that
the listing, registration or qualification of the shares subject to such option
upon any securities exchange or under any state or federal law, or the consent
or approval of any governmental or regulatory body, or that the disclosure of
non-public information or the satisfaction of any other condition is necessary
as a condition of, or in connection with, the issuance or purchase of shares
thereunder, such option may not be exercised, in whole or in part, unless such
listing, registration, qualification, consent or approval, or satisfaction of
such condition shall have been effected or obtained on conditions acceptable to
the Board of Directors. Nothing herein shall be deemed to require the Company to
apply for or to obtain such listing, registration or qualification, or to
satisfy such condition.

14. RIGHTS AS A SHAREHOLDER.

    The holder of an option shall have no rights as a shareholder with respect
to any shares covered by the option (including, without limitation, any rights
to receive dividends or non-cash distributions with respect to such shares)
until the date of issue of a stock certificate to him or her for such shares. No
adjustment shall be made for dividends or other rights for which the record date
is prior to the date such stock certificate is issued.

15. ADJUSTMENT PROVISIONS FOR RECAPITALIZATIONS AND RELATED TRANSACTIONS.

    (a) GENERAL. If, through or as a result of any merger, consolidation, sale
of all or substantially all of the assets of the Company, reorganization,
recapitalization, reclassification, stock dividend, stock split, reverse stock
split or other similar transaction, (i) the outstanding shares of Common Stock
are increased, decreased or exchanged for a different number or kind of shares
or other securities of the Company, or (ii) additional shares or new or
different shares or other securities of the Company or other non-cash assets are
distributed with respect to such shares of Common Stock or other securities, an
appropriate and proportionate adjustment may be made in (x) the maximum number
and kind of shares reserved for issuance under the Plan, (y) the number and kind
of shares or other securities

                                       23
<PAGE>
subject to any then outstanding options under the Plan, and (z) the price for
each share subject to any then outstanding options under the Plan, without
changing the aggregate purchase price as to which such options remain
exercisable. Notwithstanding the foregoing, no adjustment shall be made pursuant
to this Section 15 if such adjustment would cause the Plan to fail to comply
with Section 422 of the Code.

    (b) BOARD AUTHORITY TO MAKE ADJUSTMENTS. Any adjustments under this
Section 15 will be made by the Board of Directors, whose determination as to
what adjustments, if any, will be made and the extent thereof will be final,
binding and conclusive. No fractional shares will be issued under the Plan on
account of any such adjustments.

16. MERGER, CONSOLIDATION, ASSET SALE, LIQUIDATION, ETC.

    (a) GENERAL. In the event of a consolidation or merger or sale of all or
substantially all of the assets of the Company in which outstanding shares of
Common Stock are exchanged for securities, cash or other property of any other
corporation or business entity or in the event of a liquidation of the Company,
the Board of Directors of the Company, or the board of directors of any
corporation assuming the obligations of the Company, may, in its discretion,
take any one or more of the following actions, as to outstanding options:
(i) provide that such options shall be assumed, or equivalent options shall be
substituted, by the acquiring or succeeding corporation (or an affiliate
thereof), provided that any such options substituted for Incentive Stock Options
shall meet the requirements of Section 424(a) of the Code, (ii) upon written
notice to the optionees, provide that all unexercised options will terminate
immediately prior to the consummation of such transaction unless exercised by
the optionee within a specified period following the date of such notice,
(iii) in the event of a merger under the terms of which holders of the Common
Stock of the Company will receive upon consummation thereof a cash payment for
each share surrendered in the merger (the "Merger Price"), make or provide for a
cash payment to the optionees equal to the difference between (A) the Merger
Price times the number of shares of Common Stock subject to such outstanding
options (to the extent then exercisable at prices not in excess of the Merger
Price) and (B) the aggregate exercise price of all such outstanding options in
exchange for the termination of such options, and (iv) provide that all or any
outstanding options shall become exercisable in full immediately prior to such
event.

    (b) SUBSTITUTE OPTIONS. The Company may grant options under the Plan in
substitution for options held by employees of another corporation who become
employees of the Company, or a subsidiary of the Company, as the result of a
merger or consolidation of the employing corporation with the Company or a
subsidiary of the Company, or as a result of the acquisition by the Company, or
one of its subsidiaries, of property or stock of the employing corporation. The
Company may direct that substitute options be granted on such terms and
conditions as the Board of Directors considers appropriate in the circumstances.

17. NO SPECIAL EMPLOYMENT RIGHTS.

    Nothing contained in the Plan or in any option shall confer upon any
optionee any right with respect to the continuation of his or her employment by
the Company or interfere in any way with the right of the Company at any time to
terminate such employment or to increase or decrease the compensation of the
optionee.

                                       24
<PAGE>
18. OTHER EMPLOYEE BENEFITS.

    Except as to plans which by their terms include such amounts as
compensation, the amount of any compensation deemed to be received by an
employee as a result of the exercise of an option or the sale of shares received
upon such exercise will not constitute compensation with respect to which any
other employee benefits of such employee are determined, including, without
limitation, benefits under any bonus, pension, profit-sharing, life insurance or
salary continuation plan, except as otherwise specifically determined by the
Board of Directors.

19. AMENDMENT OF THE PLAN.

    (a) The Board of Directors may at any time, and from time to time, modify or
amend the Plan in any respect, except that if at any time the approval of the
shareholders of the Company is required under Section 422 of the Code or any
successor provision with respect to Incentive Stock Options, or under
Rule 16b-3, the Board of Directors may not effect such modification or amendment
without such approval.

    (b) The termination or any modification or amendment of the Plan shall not,
without the consent of an optionee, affect his or her rights under an option
previously granted to him or her. With the consent of the optionee affected, the
Board of Directors may amend outstanding option agreements in a manner not
inconsistent with the Plan. The Board of Directors shall have the right to amend
or modify (i) the terms and provisions of the Plan and of any outstanding
Incentive Stock Options granted under the Plan to the extent necessary to
qualify any or all such options for such favorable federal income tax treatment
(including deferral of taxation upon exercise) as may be afforded incentive
stock options under Section 422 of the Code and (ii) the terms and provisions of
the Plan and of any outstanding option to the extent necessary to ensure the
qualification of the Plan under Rule 16b-3.

20. WITHHOLDING.

    (a) The Company shall have the right to deduct from payments of any kind
otherwise due to the optionee any federal, state or local taxes of any kind
required by law to be withheld with respect to any shares issued upon exercise
of options under the Plan. Subject to the prior approval of the Company, which
may be withheld by the Company in its sole discretion, the optionee may elect to
satisfy such obligations, in whole or in part, (i) by causing the Company to
withhold shares of Common Stock otherwise issuable pursuant to the exercise of
an option or (ii) by delivering to the Company shares of Common Stock already
owned by the optionee. The shares so delivered or withheld shall have a fair
market value equal to such withholding obligation. The fair market value of the
shares used to satisfy such withholding obligation shall be determined by the
Company as of the date that the amount of tax to be withheld is to be
determined. An optionee who has made an election pursuant to this Section 20(a)
may only satisfy his or her withholding obligation with shares of Common Stock
which are not subject to any repurchase, forfeiture, unfulfilled vesting or
other similar requirements.

    (b) Notwithstanding the foregoing, in the case of a Reporting Person, no
election to use shares for the payment of withholding taxes shall be effective
unless made in compliance with any applicable requirements of Rule 16b-3 (unless
it is intended that the transaction not qualify for exemption under
Rule 16b-3).

21. CANCELLATION AND NEW GRANT OF OPTIONS, ETC.

    The Board of Directors shall have the authority to effect, at any time and
from time to time, with the consent of the affected optionees, (i) the
cancellation of any or all outstanding options under the

                                       25
<PAGE>
Plan and the grant in substitution therefor of new options under the Plan
covering the same or different numbers of shares of Common Stock and having an
option exercise price per share which may be lower or higher than the exercise
price per share of the cancelled options or (ii) the amendment of the terms of
any and all outstanding options under the Plan to provide an option exercise
price per share which is higher or lower than the then-current exercise price
per share of such outstanding options.

22. EFFECTIVE DATE AND DURATION OF THE PLAN.

    (a) EFFECTIVE DATE. The Plan shall become effective when adopted by the
Board of Directors, but no option granted under the Plan shall become
exercisable unless and until the Plan shall have been approved by the Company's
shareholders. If such shareholder approval is not obtained within twelve months
after the date of the Board's adoption of the Plan, options previously granted
under the Plan shall not vest and shall terminate and no options shall be
granted thereafter. Amendments to the Plan not requiring shareholder approval
shall become effective when adopted by the Board of Directors; amendments
requiring shareholder approval (as provided in Section 19) shall become
effective when adopted by the Board of Directors, but no option granted after
the date of such amendment shall become exercisable (to the extent that such
amendment to the Plan was required to enable the Company to grant such option to
a particular person) unless and until such amendment shall have been approved by
the Company's shareholders. If such shareholder approval is not obtained within
twelve months of the Board's adoption of such amendment, any options granted on
or after the date of such amendment shall terminate to the extent that such
amendment was required to enable the Company to grant such option to a
particular optionee. Subject to this limitation, options may be granted under
the Plan at any time after the effective date and before the date fixed for
termination of the Plan.

    (b) TERMINATION. Unless sooner terminated in accordance with Section 16, the
Plan shall terminate upon the close of business on the day next preceding the
tenth anniversary of the date of its adoption by the Board of Directors. Options
outstanding on such date shall continue to have force and effect in accordance
with the provisions of the instruments evidencing such options.

23. PROVISION FOR FOREIGN PARTICIPANTS.

    The Board of Directors may, without amending the Plan, modify awards or
options granted to participants who are foreign nationals or employed outside
the United States to recognize differences in laws, rules, regulations or
customs of such foreign jurisdictions with respect to tax, securities, currency,
employee benefit or other matters.

                                        Adopted by the Board of Directors on
                                        April 25, 1996.
                                        Approved by the Stockholders
                                        May, 1996

                                       26
<PAGE>
                                     PROXY
                           ART TECHNOLOGY GROUP, INC.
    THE BOARD OF DIRECTORS OF ART TECHNOLOGY GROUP IS SOLICITING THIS PROXY

    The undersigned owns shares of common stock of Art Technology
Group, Inc.("ATG"). ATG's Annual Meeting of Stockholders will be held on Friday,
May 19, 2000, beginning at 10:00 a.m. at the offices of Hale and Dorr LLP, 60
State Street, Boston, Massachusetts. The undersigned appoints each of Ann C.
Brady, Linda Handman, and David Westenberg, acting singly, with the power of
substitution to each, as attorney, agent and proxy to vote all shares of Common
Stock that the undersigned is entitled to vote, at this Annual Meeting and at
any adjournment or postponement of this Annual Meeting.

    The individuals named above will vote these shares as directed by the
undersigned on this proxy.

    IF NO PROPER VOTING INSTRUCTIONS ARE GIVEN, THE INDIVIDUALS NAMED ABOVE WILL
VOTE THESE SHARES FOR THE ELECTION OF THE NOMINEES LISTED ON THE REVERSE SIDE OF
THIS PROXY AS DIRECTORS OF ATG, AND FOR ITEM 2, 3 AND 4.

    IF ANY OTHER MATTERS ARE PROPERLY PRESENTED FOR CONSIDERATION AT THIS ANNUAL
MEETING, THE INDIVIDUALS NAMED ABOVE WILL HAVE THE DISCRETION TO VOTE THESE
SHARES ON THOSE MATTERS.

ITEM 1.  TO ELECT THE FOLLOWING NOMINEES AS DIRECTORS OF ATG TO SERVE UNTIL THE
         NEXT ANNUAL MEETING OF STOCKHOLDERS AND UNTIL THEIR SUCCESSORS ARE
         ELECTED AND QUALIFIED:

                Phyllis S. Swersky            Robert F. Walters
       FOR / / All Nominees                WITHHELD / / From All Nominees
/ / ____________________________________________________________________________

                    FOR all nominees except as written above

SEE REVERSE SIDE     (PLEASE SIGN AND DATE ON REVERSE SIDE)     SEE REVERSE SIDE
<PAGE>
/X/ Please mark votes as in this example.

ITEM 2.  TO RATIFY THE SELECTION OF ARTHUR ANDERSEN LLP AS INDEPENDENT
         ACCOUNTANTS OF ATG FOR THE FISCAL YEAR ENDING DECEMBER 31, 2000

<TABLE>
<S>            <C>                <C>
/ /  FOR       / /  AGAINST       / /  ABSTAIN
</TABLE>

ITEM 3.  TO APPROVE AN AMENDMENT TO THE CERTIFICATE OF INCORPORATION TO INCREASE
         THE NUMBER OF AUTHORIZED SHARES OF COMMON STOCK FROM $100,000,000
         SHARES TO $500,000,000 SHARES.

<TABLE>
<S>            <C>                <C>
/ /  FOR       / /  AGAINST       / /  ABSTAIN
</TABLE>

ITEM 4.  TO APPROVE (i) THE CONTINUANCE OF AND (ii) AN AMENDMENT TO THE 1996
         STOCK PLAN.

<TABLE>
<S>            <C>                <C>
/ /  FOR       / /  AGAINST       / /  ABSTAIN
</TABLE>

MARK HERE IF YOU PLAN TO ATTEND THE MEETING / /

MARK HERE FOR ADDRESS CHANGE AND NOTE AT LEFT / /

                                              Please sign exactly as your name
                                              is printed on this proxy. When
                                              signing as attorney-in-fact,
                                              executor, administrator, trustee,
                                              guardian or custodian, or in any
                                              other representative capacity,
                                              please write title.

                                              Owner:____________________________

                                              Date:_____________________________

                                              Co-Owner:_________________________

                                              Date:_____________________________


© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission