INKTOMI CORP
POS AM, 1998-06-12
COMPUTER INTEGRATED SYSTEMS DESIGN
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<PAGE>
 
     AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON JUNE 12, 1998
                                                     REGISTRATION NO. 333-50247
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549
 
                               ----------------
                        POST-EFFECTIVE AMENDMENT NO. 1
                                      TO
                                   FORM S-1
                            REGISTRATION STATEMENT
                                     UNDER
                          THE SECURITIES ACT OF 1933
 
                               ----------------
                              INKTOMI CORPORATION
            (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
 
        DELAWARE                   7379                     94-3238130
     (STATE OR OTHER         (PRIMARY STANDARD           (I.R.S. EMPLOYER
      JURISDICTION              INDUSTRIAL            IDENTIFICATION NUMBER)
   OFINCORPORATION OR       CLASSIFICATION CODE
      ORGANIZATION)               NUMBER)
                               ----------------
                       1900 S. NORFOLK STREET, SUITE 310
                              SAN MATEO, CA 94403
                                (650) 653-2800
  (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE, OF
                   REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)
 
                               ----------------
 
                               JERRY M. KENNELLY
                            CHIEF FINANCIAL OFFICER
                       1900 S. NORFOLK STREET, SUITE 310
                              SAN MATEO, CA 94403
                                (650) 653-2800
(NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE,
                             OF AGENT FOR SERVICE)
 
                               ----------------
 
                                  COPIES TO:
 
           DOUGLAS H. COLLOM                    DONALD M. KELLER, JR.
            ROGER E. GEORGE                       MARK L. SILVERMAN
   WILSON SONSINI GOODRICH & ROSATI               VENTURE LAW GROUP
       PROFESSIONAL CORPORATION              A PROFESSIONAL CORPORATION
          650 PAGE MILL ROAD                     2800 SAND HILL ROAD
      PALO ALTO, CALIFORNIA 94304           MENLO PARK, CALIFORNIA 94025
            (650) 493-9300                         (650) 854-4488
 
                               ----------------
 
  APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC:  As soon as
practicable after the effective date of this Registration Statement.
 
  If any of the securities being registered on this form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, check the following box. [_]
 
  If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, check the following box and
list the Securities Act registration statement number of the earlier effective
registration statement for the same offering. [_]
 
  If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [_]
 
  If this Form is a post-effective amendment filed pursuant to Rule 462(d)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [X] Registration Statement No. 333-50247.
 
  If delivery of the prospectus is expected to be made pursuant to Rule 434,
check the following box. [_]
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
<PAGE>
 
                               SUPPLEMENTAL NOTE
 
  This Registration Statement was declared effective by the Securities and
Exchange Commission on June 9, 1998. Exhibit 1.1 and Exhibit 5.1 have been
revised to accurately reflect the number of shares subject to such
registration. Accordingly, the Registration Statement is hereby amended for
the purpose of filing Exhibit 1.1 and Exhibit 5.1 as revised.
<PAGE>
 
                                    PART II
 
                     INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 16. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES
 
  (A) EXHIBITS
 
<TABLE>
<CAPTION>
  EXHIBIT
  NUMBER
  -------
 <C>       <S>
  1.1      Form of Underwriting Agreement.
  3.1**    Amended and Restated Certificate of Incorporation of the Registrant,
           as currently in effect.
  3.1(a)** Certificate of Amendment which amends the Amended and Restated
           Certificate of Incorporation as currently in effect.
  3.2**    Amended and Restated Certificate of Incorporation of the Registrant
           to be filed after the closing of the offering made under this
           Registration Statement.
  3.3**    Amended and Restated Bylaws of the Registrant, as currently in
           effect.
  3.4**    Bylaws of the Registrant to be in effect after the closing of the
           offering made under this Registration Statement.
  4.1**    Specimen Common Stock Certificate.
  5.1      Opinion of Wilson Sonsini Goodrich & Rosati, Professional
           Corporation.
 10.1**    Form of Indemnification Agreement between the Registrant and each of
           its directors and officers.
 10.2**    1998 Stock Plan and form of agreements thereunder.
 10.3**    1998 Employee Stock Purchase Plan and form of agreements thereunder.
 10.4**    1996 Equity Incentive Plan and form of agreement thereunder.
 10.5**    Fifth Amended and Restated Investors' Rights Agreement dated as of
           February 13, 1998 among the Registrant and certain of the
           Registrant's securityholders named therein.
 10.6**    Executive Employment Agreement dated as of July 1, 1996 between the
           Registrant and David C. Peterschmidt.
 10.7**    Amended and Restated Loan and Security Agreement dated as of May 12,
           1998 between the Registrant and Silicon Valley Bank.
 10.8**    Sublease Agreement dated November 27, 1996 between the Registrant
           and Macromedia, Inc.
 10.9**    Office Lease dated July 31, 1997 between the Registrant and Norfolk
           Atrium, a California limited partnership.
 10.10**   Underlease Agreement (undated) between Inktomi Limited and Technomic
           Research Associates Limited.
 10.11+**  Information Services Agreement dated as of April 1, 1998 between the
           Registrant and Wired Digital, Inc.
 10.12+**  Information Services Agreement dated as of July 27, 1997 between the
           Registrant and Microsoft Corporation.
 10.13+**  Software Development Agreement dated as of July 27, 1997 between the
           Registrant and Microsoft Corporation.
 10.14+**  Software Hosting Agreement dated as of July 27, 1997 between the
           Registrant and Microsoft Corporation.
 10.15+**  Loan Agreement dated as of July 27, 1997 between the Registrant and
           Microsoft Corporation.
 10.16**   Security Agreement dated as of July 27, 1997 between the Registrant
           and Microsoft Corporation.
</TABLE>
 
                                      II-1
<PAGE>
 
<TABLE>
<CAPTION>
 EXHIBIT
  NUMBER
 -------
 <C>      <S>
 10.17+** Escrow Agreement dated as of July 29, 1997 among the Registrant, Data
          Base, Inc., and Microsoft Corporation.
 10.18**  Lease dated May 14, 1998 between the Registrant and B.F. Saul Real
          Estate Investment Trust.
 21.1**   Subsidiaries of the Registrant.
 23.1**   Consent of Coopers & Lybrand L.L.P., Independent Accountants.
 23.2**   Consent of Counsel (see Exhibit 5.1).
 24.1**   Power of Attorney (see page II-6).
 27.1**   Financial Data Schedules.
</TABLE>
- --------
** Previously filed.
 + Certain portions of this exhibit have been omitted based upon a request for
   confidential treatment. The omitted portions have been separately filed with
   the Commission.
 
                                      II-2
<PAGE>
 
                                  SIGNATURES
 
  PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1993, AS AMENDED, THE
REGISTRANT HAS DULY CAUSED THIS POST-EFFECTIVE AMENDMENT NO. 1 TO REGISTRATION
STATEMENT TO BE SIGNED ON ITS BEHALF BY THE UNDERSIGNED, THEREUNTO DULY
AUTHORIZED, IN THE CITY OF SAN MATEO, STATE OF CALIFORNIA, ON THE 11TH DAY OF
JUNE, 1998.
 
                                          Inktomi Corporation
 
                                          By    /s/ David C. Peterschmidt
                                              _________________________________
                                                  DAVID C. PETERSCHMIDT,
                                               PRESIDENTAND CHIEF EXECUTIVE
                                                          OFFICER
 
  PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, AS AMENDED, THIS
POST-EFFECTIVE AMENDMENT NO. 1 TO REGISTRATION STATEMENT HAS BEEN SIGNED BY
THE FOLLOWING PERSONS IN THE CAPACITIES AND ON THE DATES INDICATED:
 
              SIGNATURE                        TITLE                 DATE
 
      /s/ David C. Peterschmidt        President, Chief         June 11, 1998
- -------------------------------------   Executive Officer
       (DAVID C. PETERSCHMIDT)          and Director
                                        (Principal
                                        Executive Officer)
 
        /s/ Jerry M. Kennelly          Vice President of        June 11, 1998
- -------------------------------------   Finance and Chief
         (JERRY M. KENNELLY)            Financial Officer
                                        (Principal
                                        Financial Officer)
 
                  *                    Director                 June 11, 1998
- -------------------------------------
          (ERIC A. BREWER)
 
                  *                    Director                 June 11, 1998
- -------------------------------------
         (FREDRIC W. HARMAN)
 
                  *                    Director                 June 11, 1998
- -------------------------------------
          (JOHN A. PORTER)
 
                  *                    Director                 June 11, 1998
- -------------------------------------
          (ALAN F. SHUGART)
 
*Power of Attorney
 
  By: /s/ David C. Peterschmidt
    _______________________________
       DAVID C. PETERSCHMIDT
 
 
                                     II-3
<PAGE>
 
                                 EXHIBIT INDEX
 
<TABLE>
<CAPTION>
  EXHIBIT
  NUMBER                                                                   PAGE
  -------                                                                  ----
 <C>       <S>                                                             <C>
  1.1      Form of Underwriting Agreement.
  3.1**    Amended and Restated Certificate of Incorporation of the
           Registrant, as currently in effect.
  3.1(a)** Certificate of Amendment which amends the Amended and
           Restated Certificate of Incorporation as currently in effect.
  3.2**    Amended and Restated Certificate of Incorporation of the
           Registrant to be filed after the closing of the offering made
           under this Registration Statement.
  3.3**    Amended and Restated Bylaws of the Registrant, as currently
           in effect.
  3.4**    Bylaws of the Registrant to be in effect after the closing of
           the offering made under this Registration Statement.
  4.1**    Specimen Common Stock Certificate.
  5.1      Opinion of Wilson Sonsini Goodrich & Rosati, Professional
           Corporation.
 10.1**    Form of Indemnification Agreement between the Registrant and
           each of its directors and officers.
 10.2**    1998 Stock Plan and form of agreements thereunder.
 10.3**    1998 Employee Stock Purchase Plan and form of agreements
           thereunder.
 10.4**    1996 Equity Incentive Plan and form of agreement thereunder.
 10.5**    Fifth Amended and Restated Investors' Rights Agreement dated
           as of February 13, 1998 among the Registrant and certain of
           the Registrant's securityholders named therein.
 10.6**    Executive Employment Agreement dated as of July 1, 1996
           between the Registrant and David C. Peterschmidt.
 10.7**    Amended and Restated Loan and Security Agreement dated as of
           May 12, 1998 between the Registrant and Silicon Valley Bank.
 10.8**    Sublease Agreement dated November 27, 1996 between the
           Registrant and Macromedia, Inc.
 10.9**    Office Lease dated July 31, 1997 between the Registrant and
           Norfolk Atrium, a California limited partnership.
 10.10**   Underlease Agreement (undated) between Inktomi Limited and
           Technomic Research Associates Limited.
 10.11+**  Information Services Agreement dated as of April 1, 1998
           between the Registrant and Wired Digital, Inc.
 10.12+**  Information Services Agreement dated as of July 27, 1997
           between the Registrant and Microsoft Corporation.
 10.13+**  Software Development Agreement dated as of July 27, 1997
           between the Registrant and Microsoft Corporation.
 10.14+**  Software Hosting Agreement dated as of July 27, 1997 between
           the Registrant and Microsoft Corporation.
 10.15+**  Loan Agreement dated as of July 27, 1997 between the
           Registrant and Microsoft Corporation.
 10.16**   Security Agreement dated as of July 27, 1997 between the
           Registrant and Microsoft Corporation.
 10.17+**  Escrow Agreement dated as of July 29, 1997 among the
           Registrant, Data Base, Inc., and Microsoft Corporation.
 10.18**   Lease dated May 14, 1998 between the Registrant and B.F. Saul
           Real Estate Investment Trust.
 21.1**    Subsidiaries of the Registrant.
 23.1**    Consent of Coopers & Lybrand L.L.P., Independent Accountants.
 23.2**    Consent of Counsel (see Exhibit 5.1).
 24.1**    Power of Attorney (see page II-6).
 27.1**    Financial Data Schedules.
</TABLE>
- --------
** Previously filed.
 + Certain portions of this exhibit have been omitted based upon a request for
   confidential treatment. The omitted portions have been separately filed with
   the Commission.

<PAGE>
 
                                                                     EXHIBIT 1.1

                              INKTOMI CORPORATION

                                 COMMON STOCK

                               ($.001 PAR VALUE)


                                _______________

                  AMENDED AND RESTATED UNDERWRITING AGREEMENT
                  -------------------------------------------


                                                             June 11, 1998


Goldman, Sachs & Co.,
BT Alex. Brown,
Hambrecht & Quist LLC
 As representatives of the several Underwriters
   named in Schedule I hereto,
c/o Goldman, Sachs & Co.,
85 Broad Street,
New York, New York 10004

Ladies and Gentlemen:

     Inktomi Corporation, a Delaware corporation (the "Company"), proposes,
subject to the terms and conditions stated herein, to issue and sell to the
Underwriters named in Schedule I hereto (the "Underwriters") an aggregate of
2,018,397 shares and, at the election of the Underwriters, up to 338,100
additional shares of Common Stock, $0.001 par value ("Stock") of the Company and
the stockholders of the Company named in Schedule II hereto (the "Selling
Stockholders") propose, subject to the terms and conditions stated herein, to
sell to the Underwriters an aggregate of 235,603 shares. The aggregate of
2,254,000 shares to be sold by the Company and the Selling Stockholders is
herein called the "Firm Shares" and the aggregate of 338,100 additional shares
to be sold by the Company is herein called the "Optional Shares". The Firm
Shares and the Optional Shares that the Underwriters elect to purchase pursuant
to Section 2 hereof are herein collectively called the "Shares."

     1.   (a)  The Company represents and warrants to, and agrees with, each of
the Underwriters that:

          (i)  A registration statement on Form S-1 (File No. 333-50247) (the
     "Initial Registration Statement") in respect of the Shares has been filed
     with the Securities and Exchange Commission (the "Commission"); the Initial
     Registration Statement and any post-effective amendment thereto, each in
     the form heretofore delivered to you for each of the other underwriters,
     and excluding exhibits thereto, have been declared effective by the
     Commission in such form; other than a registration statement, if any,
     increasing the size of the offering (a "Rule 462(b) Registration
     Statement"), filed pursuant to Rule 462(b) under the Securities Act of
     1933, as amended (the "Act"), which became effective upon filing, no other
     document with respect to the Initial Registration 

                                      -1-
<PAGE>
 
     Statement has heretofore been filed with the Commission; and no stop order
     suspending the effectiveness of the Initial Registration Statement, any
     post-effective amendment thereto or the Rule 462(b) Registration Statement,
     if any, has been issued and no proceeding for that purpose has been
     initiated or threatened by the Commission (any preliminary prospectus
     included in the Initial Registration Statement or filed with the Commission
     pursuant to Rule 424(a) of the rules and regulations of the Commission
     under the Act, is hereinafter called a "Preliminary Prospectus"; the
     various parts of the Initial Registration Statement and the Rule 462(b)
     Registration Statement, if any, including all exhibits thereto and
     including the information contained in the form of final prospectus filed
     with the Commission pursuant to Rule 424(b) under the Act in accordance
     with Section 5(a) hereof and deemed by virtue of Rule 430A under the Act to
     be part of the registration statement at the time it was declared effective
     or such part of the Rule 462(b) Registration Statement, if any, became or
     hereafter becomes effective, each as amended at the time such part of the
     registration statement became effective, are hereinafter collectively
     called the "Registration Statement"; and such final prospectus, in the form
     first filed pursuant to Rule 424(b) under the Act, is hereinafter called
     the "Prospectus").

          (ii)  No order preventing or suspending the use of any Preliminary
     Prospectus has been issued by the Commission, and each Preliminary
     Prospectus, at the time of filing thereof, conformed in all material
     respects to the requirements of the Act and the rules and regulations of
     the Commission thereunder, and did not contain an untrue statement of a
     material fact or omit to state a material fact required to be stated
     therein or necessary to make the statements therein, in the light of the
     circumstances under which they were made, not misleading; provided,
     however, that this representation and warranty shall not apply to any
     statements or omissions made in reliance upon and in conformity with
     information furnished in writing to the Company by an Underwriter through
     Goldman, Sachs & Co. expressly for use therein or by a Selling Stockholder
     expressly for use in the preparation of the answers therein to Items 7 and
     11(l) of Form S-1;

          (iii) The Registration Statement conforms, and the Prospectus and any
     further amendments or supplements to the Registration Statement or the
     Prospectus will conform, in all material respects to the requirements of
     the Act and the rules and regulations of the Commission thereunder and do
     not and will not, as of the applicable effective date as to the
     Registration Statement and any amendment thereto and as of the applicable
     filing date as to the Prospectus and any amendment or supplement thereto,
     contain an untrue statement of a material fact or omit to state a material
     fact required to be stated therein or necessary to make the statements
     therein not misleading; provided, however, that this representation and
     warranty shall not apply to any statements or omissions made in reliance
     upon and in conformity with information furnished in writing to the Company
     by an Underwriter through Goldman, Sachs & Co. expressly for use therein or
     by a Selling Stockholder expressly for use in the preparation of the
     answers therein to Items 7 and 11(l) of Form S-1;

          (iv)  Neither the Company nor any of its subsidiaries has sustained
     since the date of the latest audited financial statements included in the
     Prospectus any material loss or interference with its business from fire,
     explosion, flood or other calamity, whether or not covered by insurance, or
     from any labor dispute or court or governmental action, order or decree,
     otherwise than as set forth or contemplated in the Prospectus; and, since
     the respective dates as of which information is given in the Registration
     Statement and the Prospectus, there has not been any change in the capital
     stock or long-term debt of the Company or any of its subsidiaries or any
     material adverse change, or any development involving a prospective
     material adverse change, in or affecting the general affairs, management,
     financial position, stockholders' equity or results of operations of the
     Company and its subsidiaries, otherwise than as set forth or contemplated
     in the Prospectus;

          (v)   The Company and its subsidiaries have good and marketable title
     in fee simple to

                                      -2-
<PAGE>
 
     all real property and good and marketable title to all personal property
     owned by them, in each case free and clear of all liens, encumbrances and
     defects except such as are described in the Prospectus or such as do not
     materially affect the value of such property and do not interfere with the
     use made and proposed to be made of such property by the Company and its
     subsidiaries; and any real property and buildings held under lease by the
     Company and its subsidiaries are held by them under valid, subsisting and
     enforceable leases with such exceptions as are not material and do not
     interfere with the use made and proposed to be made of such property and
     buildings by the Company and its subsidiaries;

          (vi)   The Company has been duly incorporated and is validly existing
     as a corporation in good standing under the laws of the State of Delaware,
     with power and authority to own its properties and conduct its business as
     described in the Prospectus, and has been duly qualified as a foreign
     corporation for the transaction of business and is in good standing under
     the laws of each other jurisdiction in which it owns or leases properties
     or conducts any business so as to require such qualification, or is subject
     to no material liability or disability by reason of the failure to be so
     qualified in any such jurisdiction; and each subsidiary of the Company has
     been duly incorporated and is validly existing as a corporation in good
     standing under the laws of its jurisdiction of incorporation;

          (vii)  The Company has an authorized capitalization as set forth in
     the Prospectus, and all of the issued shares of capital stock of the
     Company have been duly and validly authorized and issued, are fully paid
     and non-assessable and conform to the description of the Stock contained in
     the Prospectus; and all of the issued shares of capital stock of each
     subsidiary of the Company have been duly and validly authorized and issued,
     are fully paid and non-assessable and (except for directors' qualifying
     shares) are owned directly or indirectly by the Company, free and clear of
     all liens, encumbrances, equities or claims;

          (viii) The unissued Shares to be issued and sold by the Company to the
     Underwriters hereunder have been duly and validly authorized and, when
     issued and delivered against payment therefor as provided herein, will be
     duly and validly issued and fully paid and non-assessable and will conform
     to the description of the Stock contained in the Prospectus;

          (ix)   The issue and sale of the Shares to be sold by the Company and
     the compliance by the Company with all of the provisions of this Agreement
     and the consummation of the transactions herein contemplated will not
     conflict with or result in a breach or violation of any of the terms or
     provisions of, or constitute a default under, any indenture, mortgage, deed
     of trust, loan agreement or other agreement or instrument to which the
     Company or any of its subsidiaries is a party or by which the Company or
     any of its subsidiaries is bound or to which any of the property or assets
     of the Company or any of its subsidiaries is subject, nor will such action
     result in any violation of the provisions of the Certificate of
     Incorporation or By-laws of the Company or any statute or any order, rule
     or regulation of any court or governmental agency or body having
     jurisdiction over the Company or any of its subsidiaries or any of their
     properties; and no consent, approval, authorization, order, registration or
     qualification of or with any such court or governmental agency or body is
     required for the issue and sale of the Shares or the consummation by the
     Company of the transactions contemplated by this Agreement, except the
     registration under the Act of the Shares and such consents, approvals,
     authorizations, registrations or qualifications as may be required under
     state securities or Blue Sky laws in connection with the purchase and
     distribution of the Shares by the Underwriters;

          (x)    Neither the Company nor any of its subsidiaries is in violation
     of its Certificate of Incorporation or By-laws or in default in the
     performance or observance of any material obligation, agreement, covenant
     or condition contained in any material indenture, mortgage, deed of trust,
     loan agreement, lease or other agreement or instrument to which it is a
     party or by

                                      -3-
<PAGE>
 
     which it or any of its properties may be bound;

          (xi)   The statements set forth in the Prospectus under the caption
     "Description of Capital Stock", insofar as they purport to constitute a
     summary of the terms of the Stock, and under the caption "Underwriting",
     insofar as they purport to describe the provisions of the laws and
     documents referred to therein, are accurate and complete;

          (xii)  Other than as set forth in the Prospectus, there are no legal
     or governmental proceedings pending to which the Company or any of its
     subsidiaries is a party or of which any property of the Company or any of
     its subsidiaries is the subject which, if determined adversely to the
     Company or any of its subsidiaries, would individually or in the aggregate
     have a material adverse effect on the current or future consolidated
     financial position, stockholders' equity or results of operations of the
     Company and its subsidiaries; and, to the Company's knowledge, no such
     proceedings are threatened or contemplated by governmental authorities or
     threatened by others;

          (xiii) The Company is not and, after giving effect to the offering
     and sale of the Shares, will not be an "investment company" or an entity
     "controlled" by an "investment company", as such terms are defined in the
     Investment Company Act of 1940, as amended (the "Investment Company Act");

          (xiv)  Neither the Company nor any of its affiliates does business
     with the government of Cuba or with any person or affiliate located in Cuba
     within the meaning of Section 517.075, Florida Statutes;

          (xv)   To the Company's knowledge, Coopers & Lybrand , L.L.P., who
     have certified certain financial statements of the Company and its
     subsidiaries, are independent public accountants as required by the Act and
     the rules and regulations of the Commission thereunder;

          (xvi)  The Company owns, or possesses adequate rights to use, all
     material trademarks, service marks, trade names, trademark registrations,
     service mark registrations, domain names and copyrights necessary for the
     conduct of its business and, except as set forth in the Prospectus, has no
     reason to believe that the conduct of its business will conflict with, and
     has not received any notice of any claim of conflict with any such rights
     or others except as would not have a material adverse effect on the
     business, financial condition, results of operations or prospects of the
     Company; and, to the Company's knowledge, neither the Company nor any of
     its subsidiaries have infringed or are infringing any trademarks, services
     marks, trade names, trademark registrations, service mark registrations,
     domain names or copyrights, which infringement could reasonably be expected
     to result in any material adverse change, or in any development involving a
     prospective material adverse change, in or affecting the general affairs,
     management, financial position, stockholders' equity or results of
     operations of the Company and its subsidiaries;

          (xvii) The Company owns, or possesses adequate rights to use, all
     material patents necessary for the conduct of its business; to the
     Company's knowledge, no valid Unites States patent is or would be infringed
     by the activities of the Company, except as would not have a material
     adverse effect on the business, financial condition, results of operations
     or prospects of the Company; there are no actions, suits or judicial
     proceedings pending relating to patents or proprietary information to which
     the Company is a party or of which any property of the Company is subject,
     and, to the knowledge of the Company, no actions, suits or judicial
     proceedings are threatened by governmental authorities or, except as set
     forth or incorporated by reference in the Prospectus, others, in each case
     except as would not result in any material adverse change, or in any
     development involving a prospective material adverse change, in or
     affecting the general affairs, management, financial position,
     stockholders' equity or results of 

                                      -4-
<PAGE>
 
     operations of the Company and its subsidiaries; except as set forth or
     incorporated by reference in the Prospectus or as would not result in any
     material adverse change, or in any development involving a prospective
     material adverse change, in or affecting the general affairs, management,
     financial position, stockholders' equity or results of operations of the
     Company and its subsidiaries, the Company is not aware of any claim by
     others that the Company is infringing or otherwise violating the patents or
     other intellectual property of others and is not aware of any rights of
     third parties to any of the Company's patent applications, licensed patents
     or licenses which could affect materially the use thereof by the Company;

          (xviii) The Company carries, or is covered by, insurance as is
     customary for companies similarly situated and engaged in similar
     businesses in similar industries;

          (xix)   There are no contracts or other documents which are required
     to be described in the Prospectus or to be filed or incorporated by
     reference as exhibits to the Initial Registration Statement by the Act or
     the Exchange Act which are not so filed or incorporated by reference;

          (xx)    No labor disturbance by the employees of the Company exists
     or, to the knowledge of the Company, is imminent which might be expected to
     have a material adverse effect on the business, financial condition,
     results of operations or prospects of the Company; and

          (xxi)   The Company has no material subsidiaries.

          (b)     Each of the Selling Stockholders severally represents and
warrants to, and agrees with, each of the Underwriters and the Company that:

          (i)     All consents, approvals, authorizations and orders necessary
     for the execution and delivery by such Selling Stockholder of this
     Agreement and the Power of Attorney and the Custody Agreement hereinafter
     referred to, and for the sale and delivery of the Shares to be sold by such
     Selling Stockholder hereunder, have been obtained; and such Selling
     Stockholder has full right, power and authority to enter into this
     Agreement, the Power-of-Attorney and the Custody Agreement and to sell,
     assign, transfer and deliver the Shares to be sold by such Selling
     Stockholder hereunder;

          (ii)    The sale of the Shares to be sold by such Selling Stockholder
     hereunder and the compliance by such Selling Stockholder with all of the
     provisions of this Agreement, the Power of Attorney and the Custody
     Agreement and the consummation of the transactions herein and therein
     contemplated will not conflict with or result in a breach or violation of
     any of the terms or provisions of, or constitute a default under, any
     statute, indenture, mortgage, deed of trust, loan agreement or other
     agreement or instrument to which such Selling Stockholder is a party or by
     which such Selling Stockholder is bound or to which any of the property or
     assets of such Selling Stockholder is subject, nor will such action result
     in any violation of the provisions of the Certificate of Incorporation or
     By-laws of such Selling Stockholder if such Selling Stockholder is a
     corporation, the Partnership Agreement of such Selling Stockholder if such
     Selling Stockholder is a partnership or any statute or any order, rule or
     regulation of any court or governmental agency or body having jurisdiction
     over such Selling Stockholder or the property of such Selling Stockholder;

          (iii)   Such Selling Stockholder has, and immediately prior to each
     Time of Delivery (as defined in Section 4 hereof) such Selling Stockholder
     will have, good and valid title to the Shares to be sold by such Selling
     Stockholder hereunder, free and clear of all liens, encumbrances, equities
     or claims; and, upon delivery of such Shares and payment therefor pursuant
     hereto, good and valid title to such Shares, free and clear of all liens,
     encumbrances, equities or claims, will pass to the several Underwriters;

                                      -5-
<PAGE>
 
          (iv)    During the period beginning from the date hereof and
     continuing to and including the date 180 days after the date of the
     Prospectus, not to offer, sell contract to sell or otherwise dispose of,
     except as provided hereunder, any securities of the Company that are
     substantially similar to the Shares, including but not limited to any
     securities that are convertible into or exchangeable for, or that represent
     the right to receive, Stock or any such substantially similar securities
     (other than pursuant to employee stock option plans existing on, or upon
     the conversion or exchange of convertible or exchangeable securities
     outstanding as of, the date of this Agreement), without your prior written
     consent;

          (v)     Such Selling Stockholder has not taken and will not take,
     directly or indirectly, any action which is designed to or which has
     constituted or which might reasonably be expected to cause or result in
     stabilization or manipulation of the price of any security of the Company
     to facilitate the sale or resale of the Shares;

          (vi)    To the extent that any statements or omissions made in the
     Registration Statement, any Preliminary Prospectus, the Prospectus or any
     amendment or supplement thereto are made in reliance upon and in conformity
     with written information furnished to the Company by such Selling
     Stockholder expressly for use therein, such Preliminary Prospectus and the
     Registration Statement did, and the Prospectus and any further amendments
     or supplements to the Registration Statement and the Prospectus, when they
     become effective or are filed with the Commission, as the case may be, will
     conform in all material respects to the requirements of the Act and the
     rules and regulations of the Commission thereunder and will not contain any
     untrue statement of a material fact or omit to state any material fact
     required to be stated therein or necessary to make the statements therein
     not misleading;

          (vii)   In order to document the Underwriters' compliance with the
     reporting and withholding provisions of the Tax Equity and Fiscal
     Responsibility Act of 1982 with respect to the transactions herein
     contemplated, such Selling Stockholder will deliver to you prior to or at
     the First Time of Delivery (as hereinafter defined) a properly completed
     and executed United States Treasury Department Form W-9 (or other
     applicable form or statement specified by Treasury Department regulations
     in lieu thereof);

          (viii)  Certificates in negotiable form representing all of the Shares
     to be sold by such Selling Stockholder hereunder have been placed in
     custody under a Custody Agreement, in the form heretofore furnished to you
     (the "Custody Agreement"), duly executed and delivered by such Selling
     Stockholder to Norwest Shareowner Services, as custodian (the "Custodian"),
     and such Selling Stockholder has duly executed and delivered a Power of
     Attorney, in the form heretofore furnished to you (the "Power of
     Attorney"), appointing the persons indicated in Schedule II hereto, and
     each of them, as such Selling Stockholder's attorneys-in-fact (the
     "Attorneys-in-Fact") with authority to execute and deliver this Agreement
     on behalf of such Selling Stockholder, to determine the purchase price to
     be paid by the Underwriters to the Selling Stockholders as provided in
     Section 2 hereof, to authorize the delivery of the Shares to be sold by
     such Selling Stockholder hereunder and otherwise to act on behalf of such
     Selling Stockholder in connection with the transactions contemplated by
     this Agreement and the Custody Agreement; and

          (ix)    The Shares represented by the certificates held in custody for
     such Selling Stockholder under the Custody Agreement are subject to the
     interests of the Underwriters hereunder; the arrangements made by such
     Selling Stockholder for such custody, and the appointment by such Selling
     Stockholder of the Attorneys-in-Fact by the Power of Attorney, are to that
     extent irrevocable; the obligations of the Selling Stockholders hereunder
     shall not be terminated by operation of law, whether by the death or
     incapacity of any individual Selling Stockholder or, in the case of an
     estate or trust, by the death or incapacity of any executor or 

                                      -6-
<PAGE>
 
     trustee or the termination of such estate or trust, or in the case of a
     partnership or corporation, by the dissolution of such partnership or
     corporation, or by the occurrence of any other event; if any individual
     Selling Stockholder or any such executor or trustee should die or become
     incapacitated, or if any such estate or trust should be terminated, or if
     any such partnership or corporation should be dissolved, or if any other
     such event should occur, before the delivery of the Shares hereunder,
     certificates representing the Shares shall be delivered by or on behalf of
     the Selling Stockholders in accordance with the terms and conditions of
     this Agreement and of the Custody Agreements; and actions taken by the
     Attorneys-in-Fact pursuant to the Powers of Attorney shall be as valid as
     if such death, incapacity, termination, dissolution or other event had not
     occurred, regardless of whether or not the Custodian, the Attorneys-in-
     Fact, or any of them, shall have received notice of such death, incapacity,
     termination, dissolution or other event.

     2.   Subject to the terms and conditions herein set forth, (a) the Company
and each of the Selling Stockholders agree, severally and not jointly, to sell
to each of the Underwriters, and each of the Underwriters agrees, severally and
not jointly, to purchase from the Company and each of the Selling Stockholders,
at a purchase price per share of $16.74, the number of Firm Shares (to
be adjusted by you so as to eliminate fractional shares) determined by
multiplying the aggregate number of Shares to be sold by the Company and each of
the Selling Stockholders as set forth opposite their respective names in
Schedule II hereto by a fraction, the numerator of which is the aggregate number
of Firm Shares to be purchased by such Underwriter as set forth opposite the
name of such Underwriter in Schedule I hereto and the denominator of which is
the aggregate number of Firm Shares to be purchased by all of the Underwriters
from the Company and all of the Selling Stockholders hereunder and (b) in the
event and to the extent that the Underwriters shall exercise the election to
purchase Optional Shares as provided below, the Company agrees to sell to each
of the Underwriters, and each of the Underwriters agrees, severally and not
jointly, to purchase from the Company, at the purchase price per share set forth
in clause (a) of this Section 2, that portion of the number of Optional Shares
as to which such election shall have been exercised (to be adjusted by you so as
to eliminate fractional shares) determined by multiplying such number of
Optional Shares by a fraction, the numerator of which is the maximum number of
Optional Shares which such Underwriter is entitled to purchase as set forth
opposite the name of such Underwriter in Schedule I hereto and the denominator
of which is the maximum number of Optional Shares that all of the Underwriters
are entitled to purchase hereunder.

     The Company hereby grants to the Underwriters the right to purchase at
their election up to 338,100 Optional Shares, at the purchase price per share
set forth in the paragraph above, for the sole purpose of covering
overallotments in the sale of the Firm Shares. Any such election to purchase
Optional Shares may be exercised only by written notice from you to the Company,
given within a period of 30 calendar days after the date of this Agreement and
setting forth the aggregate number of Optional Shares to be purchased and the
date on which such Optional Shares are to be delivered, as determined by you but
in no event earlier than the First Time of Delivery (as defined in Section 4
hereof) or, unless you and the Company otherwise agree in writing, earlier than
two or later than ten business days after the date of such notice.

     3.   Upon the authorization by you of the release of the Firm Shares, the
several Underwriters propose to offer the Firm Shares for sale upon the terms
and conditions set forth in the Prospectus.

     4.   (a)  The Shares to be purchased by each Underwriter hereunder, in

                                      -7-
<PAGE>
 
definitive form, and in such authorized denominations and registered in such
names as Goldman, Sachs & Co. may request upon at least forty-eight hours' prior
notice to the Company and the Selling Stockholders shall be delivered by or on
behalf of the Company and the Selling Stockholders to Goldman, Sachs & Co., for
the account of such Underwriter, against payment by or on behalf of such
Underwriter of the purchase price therefor by wire transfer, payable to the
order of the Company and the Custodian, as their interests may appear, in
federal (same day) funds. The Company will cause the certificates representing
the Shares to be made available for checking and packaging at least twenty-four
hours prior to the Time of Delivery (as defined below) with respect thereto at
the office of Goldman, Sachs & Co., 85 Broad Street, New York, New York 10004
(the "Designated Office"). The time and date of such delivery and payment shall
be, with respect to the Firm Shares, 9:30 a.m., New York time, on June 15,
1998 or such other time and date as Goldman, Sachs & Co., the Company and the
Selling Stockholders may agree upon in writing, and, with respect to the
Optional Shares, 9:30 a.m., New York time, on the date specified by Goldman,
Sachs & Co. in the written notice given by Goldman, Sachs & Co. of the
Underwriters' election to purchase such Optional Shares, or such other time and
date as Goldman, Sachs & Co and the Company may agree upon in writing. Such time
and date for delivery of the Firm Shares is herein called the "First Time of
Delivery", such time and date for delivery of the Optional Shares, if not the
First Time of Delivery, is herein called the "Second Time of Delivery", and each
such time and date for delivery is herein called a "Time of Delivery."
     
     (b)  The documents to be delivered at each Time of Delivery by or on behalf
of the parties hereto pursuant to Section 7 hereof, including the cross receipt
for the Shares and any additional documents requested by the Underwriters
pursuant to Section 7(l) hereof, will be delivered at the offices of Wilson,
Sonsini, Goodrich & Rosati, 650 Page Mill Road, Palo Alto, California 94304 (the
"Closing Location"), and the Shares will be delivered at the Designated Office,
all at such Time of Delivery.  A meeting will be held at the Closing Location at
10:00 a.m., New York City time, on the New York Business Day next preceding
such Time of Delivery, at which meeting the final drafts of the documents to be
delivered pursuant to the preceding sentence will be available for review by the
parties hereto.  For the purposes of this Section 4, "New York Business Day"
shall mean each Monday, Tuesday, Wednesday, Thursday and Friday which is not a
day on which banking institutions in New York are generally authorized or
obligated by law or executive order to close.

     5.   The Company agrees with each of the Underwriters:

          (a)  To prepare the Prospectus in a form approved by you and to file
     such Prospectus pursuant to Rule 424(b) under the Act not later than the
     Commission's close of business on the second business day following the
     execution and delivery of this Agreement, or, if applicable, such earlier
     time as may be required by Rule 430A(a)(3) under the Act; to make no
     further amendment or any supplement to the Registration Statement or
     Prospectus which shall be disapproved by you promptly after reasonable
     notice thereof; to advise you, promptly after it receives notice thereof,
     of the time when any amendment to the Registration Statement has been filed
     or becomes effective or any supplement to the Prospectus or any amended
     Prospectus has been filed and to furnish you with copies thereof; to advise
     you, promptly after it receives notice thereof, of the issuance by the
     Commission of any stop order or of any order preventing or suspending the
     use of any Preliminary Prospectus or prospectus, of the suspension of the
     qualification of the Shares for offering or sale in any jurisdiction, of
     the initiation or threatening of any proceeding for any such purpose, or of
     any request by the Commission for the amending or supplementing of the
     Registration Statement or Prospectus or for additional information; and, in
     the event of the issuance of any stop order or of any order preventing or
     suspending the use of any Preliminary Prospectus or prospectus or
     suspending any such qualification, promptly to use its best efforts to
     obtain the withdrawal of such order;

          (b)  Promptly from time to time to take such action as you may
     reasonably request to qualify the Shares for offering and sale under the
     securities laws of such jurisdictions as you may 

                                      -8-
<PAGE>
 
     request and to comply with such laws so as to permit the continuance of
     sales and dealings therein in such jurisdictions for as long as may be
     necessary to complete the distribution of the Shares, provided that in
     connection therewith the Company shall not be required to qualify as a
     foreign corporation or to file a general consent to service of process in
     any jurisdiction;

          (c)  Prior to 10:00 a.m., New York City time, on the New York Business
     Day next succeeding the date of this Agreement and from time to time, to
     furnish the Underwriters with copies of the Prospectus in New York City in
     such quantities as you may reasonably request, and, if the delivery of a
     prospectus is required at any time prior to the expiration of nine months
     after the time of issue of the Prospectus in connection with the offering
     or sale of the Shares and if at such time any events shall have occurred as
     a result of which the Prospectus as then amended or supplemented would
     include an untrue statement of a material fact or omit to state any
     material fact necessary in order to make the statements therein, in the
     light of the circumstances under which they were made when such Prospectus
     is delivered, not misleading, or, if for any other reason it shall be
     necessary during such period to amend or supplement the Prospectus in order
     to comply with the Act, to notify you and upon your request to prepare and
     furnish without charge to each Underwriter and to any dealer in securities
     as many copies as you may from time to time reasonably request of an
     amended Prospectus or a supplement to the Prospectus which will correct
     such statement or omission or effect such compliance, and in case any
     Underwriter is required to deliver a prospectus in connection with sales of
     any of the Shares at any time nine months or more after the time of issue
     of the Prospectus, upon your request but at the expense of such
     Underwriter, to prepare and deliver to such Underwriter as many copies as
     you may request of an amended or supplemented Prospectus complying with
     Section 10(a)(3) of the Act;

          (d)  To make generally available to its securityholders as soon as
     practicable, but in any event not later than eighteen months after the
     effective date of the Registration Statement (as defined in Rule 158(c)
     under the Act), an earnings statement of the Company and its subsidiaries
     (which need not be audited) complying with Section 11(a) of the Act and the
     rules and regulations of the Commission thereunder (including, at the
     option of the Company, Rule 158);

          (e)  During the period beginning from the date hereof and continuing
     to and including the date 180 days after the date of the Prospectus, not to
     offer, sell, contract to sell or otherwise dispose of, except as provided
     hereunder, any securities of the Company that are substantially similar to
     the Shares, including but not limited to any securities that are
     convertible into or exchangeable for, or that represent the right to
     receive, Stock or any such substantially similar securities (other than (i)
     pursuant to employee stock option plans and employee stock purchase plans
     existing on, or upon the conversion or exchange of convertible or
     exchangeable securities, or the exercise of warrants, outstanding as of,
     the date of this Agreement or (ii) pursuant to an acquisition transaction
     accounted for under the "pooling of interests" method of accounting,
     provided that any person or entity who acquires securities of the Company
     in this manner agrees not to offer, sell, contract to sell or otherwise
     dispose of such securities for the period of time beginning from the date
     of the acquisition of such securities and continuing to and including the
     date 180 days after the date of the Prospectus), without your prior written
     consent;

          (f)  To furnish to its stockholders as soon as practicable after the
     end of each fiscal year an annual report (including a balance sheet and
     statements of income, stockholders' equity and cash flows of the Company
     and its consolidated subsidiaries certified by independent public
     accountants) and, as soon as practicable after the end of each of the first
     three quarters of each fiscal year (beginning with the fiscal quarter
     ending after the effective date of the Registration Statement),
     consolidated summary financial information of the Company and its
     subsidiaries for such quarter in accordance with applicable Commission
     regulations;

                                      -9-
<PAGE>
 
          (g)  During a period of three years from the effective date of the
     Registration Statement, to furnish to you copies of all reports or other
     communications (financial or other) furnished to stockholders, and to
     deliver to you (i) as soon as they are available, copies of any reports and
     financial statements furnished to or filed with the Commission or any
     national securities exchange on which any class of securities of the
     Company is listed; and (ii) such additional public information concerning
     the business and financial condition of the Company as you may from time to
     time reasonably request (such financial statements to be on a consolidated
     basis to the extent the accounts of the Company and its subsidiaries are
     consolidated in reports furnished to its stockholders generally or to the
     Commission);

          (h)  To use the net proceeds received by it from the sale of the
     Shares pursuant to this Agreement in the manner specified in the Prospectus
     under the caption "Use of Proceeds";

          (i)  To use its best efforts to list for quotation the Shares on the
     National Association of Securities Dealers Automated Quotations National
     Market System ("NASDAQ");

          (j)  If the Company elects to rely upon Rule 462(b), the Company shall
     file a Rule 462(b) Registration Statement with the Commission in compliance
     with Rule 462(b) by 10:00 p.m. Washington, D.C. time, on the date of this
     Agreement, and the Company shall at the time of filing either pay to the
     Commission the filing fee for the Rule 462(b) Registration Statement or
     give irrevocable instructions for the payment of such fee pursuant to Rule
     111(b) under the Act; and

          (k)  To make such disclosure as may be required by Rule 463 under the
     Act.

     6.   The Company and each of the Selling Stockholders covenant and agree
with one another and with the several Underwriters that (a) the Company will pay
or cause to be paid the following: (i) the fees, disbursements and expenses of
the Company's counsel and accountants in connection with the registration of the
Shares under the Act and all other expenses in connection with the preparation,
printing and filing of the Registration Statement, any Preliminary Prospectus
and the Prospectus and amendments and supplements thereto and the mailing and
delivering of copies thereof to the Underwriters and dealers; (ii) the cost of
printing or producing any Agreement among Underwriters, this Agreement, the Blue
Sky Memorandum, closing documents (including any compilations thereof) and any
other documents in connection with the offering, purchase, sale and delivery of
the Shares; (iii) all expenses in connection with the qualification of the
Shares for offering and sale under state securities laws as provided in Section
5(b) hereof, including the fees and disbursements of counsel for the
Underwriters in connection with such qualification and in connection with the
Blue Sky survey (iv) all fees and expenses in connection with listing the Shares
on NASDAQ; (v) the filing fees incident to, and the fees and disbursements of
counsel for the Underwriters in connection with, securing any required review by
the National Association of Securities Dealers, Inc. of the terms of the sale of
the Shares; (vi) the cost of preparing stock certificates; (vii) the cost and
charges of any transfer agent or registrar; and (viii) all other costs and
expenses incident to the performance of its obligations hereunder which are not
otherwise specifically provided for in this Section; and (b) such Selling
Stockholder will pay or cause to be paid all costs and expenses incident to the
performance of such Selling Stockholder's obligations hereunder which are not
otherwise specifically provided for in this Section, including (i) such Selling
Stockholder's pro rata share of the fees and expenses of the Attorneys-in-Fact
and the Custodian, if any, and (ii) all expenses and taxes incident to the sale
and delivery of the Shares to be sold by such Selling Stockholder to the
Underwriters hereunder.  In connection with clause (b) of the preceding
sentence, Goldman, Sachs & Co. agrees to pay New York State stock transfer tax,
and the Selling Stockholder agrees to reimburse Goldman, Sachs & Co. for
associated carrying costs if such tax payment is not rebated on the day of
payment and for any portion of such tax payment not rebated.  It is understood,
however, that the Company shall bear, and the Selling Stockholders shall not be
required to pay or to reimburse the Company for, the cost of any other 

                                      -10-
<PAGE>
 
matters not directly relating to the sale and purchase of the Shares pursuant to
this Agreement, and that, except as provided in this Section, and Sections 8 and
11 hereof, the Underwriters will pay all of their own costs and expenses,
including the fees of their counsel, stock transfer taxes on resale of any of
the Shares by them, and any advertising expenses connected with any offers they
may make.

     7.   The obligations of the Underwriters hereunder, as to the Shares to be
delivered at each Time of Delivery, shall be subject, in their discretion, to
the condition that all representations and warranties and other statements of
the Company and of the Selling Stockholders herein are, at and as of such Time
of Delivery, true and correct, the condition that the Company and the Selling
Stockholders shall have performed all of its and their obligations hereunder
theretofore to be performed, and the following additional conditions:

          (a)  The Prospectus shall have been filed with the Commission pursuant
     to Rule 424(b) within the applicable time period prescribed for such filing
     by the rules and regulations under the Act and in accordance with Section
     5(a) hereof; if the Company has elected to rely upon Rule 462(b), the Rule
     462(b) Registration Statement shall have become effective by 10:00 p.m.,
     Washington, D.C. time, on the date of this Agreement; no stop order
     suspending the effectiveness of the Registration Statement or any part
     thereof shall have been issued and no proceeding for that purpose shall
     have been initiated or threatened by the Commission; and all requests for
     additional information on the part of the Commission shall have been
     complied with to your reasonable satisfaction;

          (b)  Venture Law Group, A Professional Corporation, counsel for the
     Underwriters, shall have furnished to you such opinion or opinions (a draft
     of such opinion or opinions is attached as Annex II(a) hereto), dated such
     Time of Delivery, with respect to the matters covered in paragraphs (i),
     (ii), (vii), (xi) and (xiii) of subsection (c) below as well as such other
     related matters as you may reasonably request, and such counsel shall have
     received such papers and information as they may reasonably request to
     enable them to pass upon such matters;

          (c)  Wilson Sonsini Goodrich & Rosati, Professional Corporation,
     counsel for the Company, shall have furnished to you their written opinion,
     dated such Time of Delivery, in form and substance satisfactory to you, to
     the effect that:

               (i)   The Company has been duly incorporated and is validly
          existing as a corporation in good standing under the laws of the State
          of Delaware, with power and authority (corporate and other) to own its
          properties and conduct its business as described in the Prospectus;

               (ii)  The Company has an authorized capitalization as set forth
          in the Prospectus, and all of the issued shares of capital stock of
          the Company (including the Shares being delivered at such Time of
          Delivery) have been duly and validly authorized and issued and are
          fully paid and non-assessable; and the Shares conform to the
          description of the Stock contained in the Prospectus;

               (iii) The Company has been duly qualified as a foreign
          corporation for the transaction of business and is in good standing
          under the laws of each other jurisdiction in which it owns or leases
          properties or conducts any business so as to require such
          qualification, except where the failure to be so qualified would not
          have a material adverse effect on the Company (such counsel being
          entitled to rely in respect of the opinion in this clause upon
          opinions of local counsel and in respect of matters of fact upon
          certificates of officers of the Company, provided that such counsel
          shall state that they believe that both you and they are justified in
          relying upon such opinions and certificates);

                                      -11-
<PAGE>
 
               (iv)   To such counsel's knowledge and other than as set forth in
          the Prospectus, there are no legal or governmental proceedings pending
          to which the Company is a party or of which any property of the
          Company is the subject which, if determined adversely to the Company,
          would individually or in the aggregate have a material adverse effect
          on the current or future consolidated financial position,
          stockholders' equity or results of operations of the Company; and, to
          the best of such counsel's knowledge, no such proceedings are
          threatened or contemplated by governmental authorities or threatened
          by others;

               (v)    This Agreement has been duly authorized, executed and
          delivered by the Company;

               (vi)   The issue and sale of the Shares being delivered at such
          Time of Delivery and the compliance by the Company with all of the
          provisions of this Agreement and the consummation of the transactions
          herein contemplated will not conflict with or result in a breach or
          violation of any of the terms or provisions of, or constitute a
          default under, any agreement included as an exhibit to the
          Registration Statement, nor will such action result in any violation
          of the provisions of the Certificate of Incorporation or By-laws of
          the Company or any statute or any order, rule or regulation known to
          such counsel of any court or governmental agency or body having
          jurisdiction over the Company or any of its subsidiaries or any of
          their properties;

               (vii)  No consent, approval, authorization, order, registration
          or qualification of or with any such court or governmental agency or
          body is required for the issue and sale of the Shares or the
          consummation by the Company of the transactions contemplated by this
          Agreement, except the registration under the Act of the Shares, and
          such consents, approvals, authorizations, registrations or
          qualifications as may be required under state securities or Blue Sky
          laws in connection with the purchase and distribution of the Shares by
          the Underwriters;

               (viii) To such counsel's knowledge, the Company is not in
          violation of its Certificate of Incorporation or By-laws;

               (ix)   The statements set forth in the Prospectus under the
          caption "Description of Capital Stock," insofar as they purport to
          constitute a summary of the terms of the Stock, and under the caption
          "Underwriting," insofar as they purport to describe the provisions of
          the laws and documents referred to therein, are accurate, complete and
          fair in all material respects;

               (x)    The Company is not an "investment company" or an entity
          "controlled" by an "investment company", as such terms are defined in
          the Investment Company Act, assuming that, pending their uses
          identified in the Prospectus, the net proceeds of the offering
          contemplated by the Prospectus will be invested in "government
          securities" within the meaning of the Investment Company Act; and

               (xi)   The Registration Statement and the Prospectus and any
          further amendments and supplements thereto made by the Company prior
          to such Time of Delivery (other than the financial statements and
          related schedules and financial data therein, as to which such counsel
          need express no opinion) comply as to form in all material respects
          with the requirements of the Act and the rules and regulations
          thereunder; although they do not assume any responsibility for the
          accuracy, completeness or fairness of the statements contained in the
          Registration Statement or the Prospectus, except for those referred to
          in the opinion in subsection (xi) of this Section 7(c), they have no
          reason to believe that, as of its effective date, the Registration
          Statement or any further 

                                      -12-
<PAGE>
 
          amendment thereto made by the Company prior to such Time of Delivery
          (other than the financial statements and related schedules and
          financial data therein, as to which such counsel need express no
          opinion) contained an untrue statement of a material fact or omitted
          to state a material fact required to be stated therein or necessary to
          make the statements therein not misleading or that, as of its date,
          the Prospectus or any further amendment or supplement thereto made by
          the Company prior to such Time of Delivery (other than the financial
          statements and related schedules therein, as to which such counsel
          need express no opinion) contained an untrue statement of a material
          fact or omitted to state a material fact necessary to make the
          statements therein, in the light of the circumstances under which they
          were made, not misleading or that, as of such Time of Delivery, either
          the Registration Statement or the Prospectus or any further amendment
          or supplement thereto made by the Company prior to such Time of
          Delivery (other than the financial statements and related schedules
          and financial data therein, as to which such counsel need express no
          opinion) contains an untrue statement of a material fact or omits to
          state a material fact necessary to make the statements therein, in the
          light of the circumstances under which they were made, not misleading;
          and they do not know of any amendment to the Registration Statement
          required to be filed or of any contracts or other documents of a
          character required to be filed as an exhibit to the Registration
          Statement or required to be described in the Registration Statement or
          the Prospectus which are not filed or described as required.

          (d)  Wilson Sonsini Goodrich & Rosati, Professional Corporation, shall
     have furnished to you their written opinion with respect to each of the
     Selling Stockholders, dated such Time of Delivery, in form and substance
     satisfactory to you, to the effect that:

               (i)   A Power-of-Attorney and a Custody Agreement have been duly
          executed and delivered by such Selling Stockholder and constitute
          valid and binding agreements of such Selling Stockholder enforceable
          in accordance with their terms;

               (ii)  This Agreement has been duly executed and delivered by or
          on behalf of such Selling Stockholder; and the sale of the Shares to
          be sold by such Selling Stockholder hereunder and the compliance by
          such Selling Stockholder with all of the provisions of this Agreement,
          the Power-of-Attorney and the Custody Agreement and the consummation
          of the transactions herein and therein contemplated will not conflict
          with or result in a breach or violation of any terms or provisions of,
          or constitute a default under, any statute, indenture, mortgage, deed
          of trust, loan agreement or other agreement or instrument known to
          such counsel to which such Selling Stockholder is a party or by which
          such Selling Stockholder is bound or to which any of the property or
          assets of such Selling Stockholder is subject, nor will such action
          result in any violation of the provisions of the Certificate of
          Incorporation or By-laws of such Selling Stockholder if such Selling
          Stockholder is a corporation, the Partnership Agreement of such
          Selling Stockholder if such Selling Stockholder is a partnership or
          any order, rule or regulation known to such counsel of any court or
          governmental agency or body having jurisdiction over such Selling
          Stockholder or the property of such Selling Stockholder;

               (iii) To such counsel's knowledge, no consent, approval,
          authorization or order of any court or governmental agency or body is
          required for the consummation of the transactions contemplated by this
          Agreement in connection with the Shares to be sold by such Selling
          Stockholder hereunder, except [NAME ANY SUCH CONSENT, APPROVAL,
          AUTHORIZATION OR ORDER] which [HAS] [HAVE] been duly obtained and [IS]
          [ARE] in full force and effect, such as have been obtained under the
          Act and such as may be required under state securities or Blue Sky
          laws in connection with the purchase and distribution of such Shares
          by the Underwriters;

                                      -13-
<PAGE>
 
                 (iv) Immediately prior to such Time of Delivery, such Selling
          Stockholder had good and valid title to the Shares to be sold at such
          Time of Delivery by such Selling Stockholder under this Agreement,
          free and clear of all liens, encumbrances, equities or claims, and
          full right, power and authority to sell, assign, transfer and deliver
          the Shares to be sold by such Selling Stockholder hereunder; and

                 (v)  Good and valid title to such Shares, free and clear of all
          liens, encumbrances, equities or claims, has been transferred to each
          of the several Underwriters who have purchased such Shares in good
          faith and without notice of any such lien, encumbrance, equity or
          claim or any other adverse claim within the meaning of the Uniform
          Commercial Code.

     In rendering the opinion in paragraph (iv), such counsel may rely upon a
certificate of such Selling Stockholder in respect of matters of fact as to
ownership of, and liens, encumbrances, equities or claims on, the Shares sold by
such Selling Stockholder, provided that such counsel shall state that they
believe that both you and they are justified in relying upon such certificate;

          (e)    On the date of the Prospectus at a time prior to the execution
     of this Agreement, at 9:30 a.m., New York City time, on the effective date
     of any post-effective amendment to the Registration Statement filed
     subsequent to the date of this Agreement and also at each Time of Delivery,
     Coopers & Lybrand, L.L.P. shall have furnished to you a letter or letters,
     dated the respective dates of delivery thereof, in form and substance
     satisfactory to you, to the effect set forth in Annex I hereto (the
     executed copy of the letter delivered prior to the execution of this
     Agreement is attached as Annex I(a) hereto and a draft of the form of
     letter to be delivered on the effective date of any post-effective
     amendment to the Registration Statement and as of each Time of Delivery is
     attached as Annex I(b) hereto);

          (f)(i) Neither the Company nor any of its subsidiaries shall have
     sustained since the date of the latest audited financial statements
     included in the Prospectus any loss or interference with its business from
     fire, explosion, flood or other calamity, whether or not covered by
     insurance, or from any labor dispute or court or governmental action, order
     or decree, otherwise than as set forth or contemplated in the Prospectus,
     and (ii) since the respective dates as of which information is given in the
     Prospectus there shall not have been any change in the capital stock or
     long-term debt of the Company or any of its subsidiaries (except for
     changes occurring as a result of the exercise of previously granted stock
     options) or any change, or any development involving a prospective change,
     in or affecting the general affairs, management, financial position,
     stockholders' equity or results of operations of the Company and its
     subsidiaries, otherwise than as set forth or contemplated in the
     Prospectus, the effect of which, in any such case described in Clause (i)
     or (ii), is in the judgment of the Representatives so material and adverse
     as to make it impracticable or inadvisable to proceed with the public
     offering or the delivery of the Shares being delivered at such Time of
     Delivery on the terms and in the manner contemplated in the Prospectus;

          (g)    On or after the date hereof there shall not have occurred any
     of the following: (i) a suspension or material limitation in trading in
     securities generally on the New York Stock Exchange or on NASDAQ; (ii) a
     suspension or material limitation in trading in the Company's securities on
     NASDAQ; (iii) a general moratorium on commercial banking activities
     declared by either Federal or New York State authorities; or (iv) the
     outbreak or escalation of hostilities involving the United States or the
     declaration by the United States of a national emergency or war, if the
     effect of any such event specified in this Clause (iv) in the judgment of
     the Representatives makes it impracticable or inadvisable to proceed with
     the public offering or the delivery of the Shares being delivered at such
     Time of Delivery on the terms and in the manner contemplated in the
     Prospectus;

                                      -14-
<PAGE>
 
          (h)    The Shares at such Time of Delivery shall have been duly
     listed, subject to notice of issuance, for quotation on NASDAQ;

          (i)    The Company shall have obtained and delivered to the
     Underwriters executed copies of an agreement from each officer, director,
     stockholder and optionholder of the Company (except for those officers,
     directors, stockholders or optionholders of the Company set forth on
     Schedule III hereto and agreed to by you), substantially to the effect set
     forth in Subsection 1(b)(iv) hereof in form and substance satisfactory to
     you;

          (j)    The Company shall have complied with the provisions of Section
     5(c) hereof with respect to the furnishing of prospectuses on the New York
     Business Day next succeeding the date of this Agreement; and

          (k)    The Company and the Selling Stockholders shall have furnished
     or caused to be furnished to you at such Time of Delivery certificates of
     officers of the Company and of the Selling Stockholders, respectively,
     satisfactory to you as to the accuracy of the representations and
     warranties of the Company and the Selling Stockholders, respectively,
     herein at and as of such Time of Delivery, as to the performance by the
     Company and the Selling Stockholders of all of their respective obligations
     hereunder to be performed at or prior to such Time of Delivery, and as to
     such other matters as you may reasonably request, and the Company shall
     have furnished or caused to be furnished certificates as to the matters set
     forth in subsections (a) and (f) of this Section.

     8.   (a)  The Company will indemnify and hold harmless each Underwriter
against any losses, claims, damages or liabilities, joint or several, to which
such Underwriter may become subject, under the Act or otherwise, insofar as such
losses, claims, damages or liabilities (or actions in respect thereof) arise out
of or are based upon an untrue statement or alleged untrue statement of a
material fact contained in any Preliminary Prospectus, the Registration
Statement or the Prospectus, or any amendment or supplement thereto, or arise
out of or are based upon the omission or alleged omission to state therein a
material fact required to be stated therein or necessary to make the statements
therein not misleading, and will reimburse each Underwriter for any legal or
other expenses reasonably incurred by such Underwriter in connection with
investigating or defending any such action or claim as such expenses are
incurred; provided, however, that the Company shall not be liable in any such
case to the extent that any such loss, claim, damage or liability arises out of
or is based upon an untrue statement or alleged untrue statement or omission or
alleged omission made in any Preliminary Prospectus, the Registration Statement
or the Prospectus or any such amendment or supplement in reliance upon and in
conformity with written information furnished to the Company by any Underwriter
through Goldman, Sachs & Co. expressly for use therein.

          (b)  Each of the Selling Stockholders will indemnify and hold harmless
each Underwriter against any losses, claims, damages or liabilities, severally
and not jointly, to which such Underwriter may become subject, under the Act or
otherwise, insofar as such losses, claims, damages or liabilities (or actions in
respect thereof) arise out of or are based upon an untrue statement or alleged
untrue statement of a material fact contained in any Preliminary Prospectus, the
Registration Statement or the Prospectus, or any amendment or supplement
thereto, or arise out of or are based upon the omission or alleged omission to
state therein a material fact required to be stated therein or necessary to make
the statements therein not misleading, in each case to the extent, but only to
the extent, that such untrue statement or alleged untrue statement or omission
or alleged omission was made in any Preliminary Prospectus, the Registration
Statement or the Prospectus or any such amendment or supplement in reliance upon
and in conformity with written information furnished to the Company by such
Selling Stockholder expressly for use therein; and will reimburse each
Underwriter for any legal or other expenses reasonably incurred by such
Underwriter in connection with investigating or defending any such action or
claim as such expenses are incurred; provided, however, that such Selling
Stockholder

                                      -15-
<PAGE>
 
shall not be liable in any such case to the extent that any such loss, claim,
damage or liability arises out of or is based upon an untrue statement or
alleged untrue statement or omission or alleged omission made in any Preliminary
Prospectus, the Registration Statement or the Prospectus or any such amendment
or supplement in reliance upon and in conformity with written information
furnished to the Company by any Underwriter through Goldman, Sachs & Co.
expressly for use therein.

          (c)  Each Underwriter will indemnify and hold harmless the Company and
each Selling Stockholder against any losses, claims, damages or liabilities to
which the Company or such Selling Stockholder may become subject, under the Act
or otherwise, insofar as such losses, claims, damages or liabilities (or actions
in respect thereof) arise out of or are based upon an untrue statement or
alleged untrue statement of a material fact contained in any Preliminary
Prospectus, the Registration Statement or the Prospectus, or any amendment or
supplement thereto, or arise out of or are based upon the omission or alleged
omission to state therein a material fact required to be stated therein or
necessary to make the statements therein not misleading, in each case to the
extent, but only to the extent, that such untrue statement or alleged untrue
statement or omission or alleged omission was made in any Preliminary
Prospectus, the Registration Statement or the Prospectus or any such amendment
or supplement in reliance upon and in conformity with written information
furnished to the Company by such Underwriter through Goldman, Sachs & Co.
expressly for use therein; and will reimburse the Company and each Selling
Stockholder for any legal or other expenses reasonably incurred by the Company
or such Selling Stockholder in connection with investigating or defending any
such action or claim as such expenses are incurred.

          (d)  Promptly after receipt by an indemnified party under subsection
(a) or (b) above of notice of the commencement of any action, such indemnified
party shall, if a claim in respect thereof is to be made against the
indemnifying party under such subsection, notify the indemnifying party in
writing of the commencement thereof; but the omission so to notify the
indemnifying party shall not relieve it from any liability which it may have to
any indemnified party otherwise than under such subsection. In case any such
action shall be brought against any indemnified party and it shall notify the
indemnifying party of the commencement thereof, the indemnifying party shall be
entitled to participate therein and, to the extent that it shall wish, jointly
with any other indemnifying party similarly notified, to assume the defense
thereof, with counsel satisfactory to such indemnified party (who shall not,
except with the consent of the indemnified party, be counsel to the indemnifying
party), and, after notice from the indemnifying party to such indemnified party
of its election so to assume the defense thereof, the indemnifying party shall
not be liable to such indemnified party under such subsection for any legal
expenses of other counsel or any other expenses, in each case subsequently
incurred by such indemnified party, in connection with the defense thereof other
than reasonable costs of investigation. No indemnifying party shall, without the
written consent of the indemnified party, effect the settlement or compromise
of, or consent to the entry of any judgment with respect to, any pending or
threatened action or claim in respect of which indemnification or contribution
may be sought hereunder (whether or not the indemnified party is an actual or
potential party to such action or claim) unless such settlement, compromise or
judgment (i) includes an unconditional release of the indemnified party from all
liability arising out of such action or claim and (ii) does not include a
statement as to or an admission of fault, culpability or a failure to act, by or
on behalf of any indemnified party.

          (e)  If the indemnification provided for in this Section 8 is
unavailable to or insufficient to hold harmless an indemnified party under
subsection (a) or (b) above in respect of any losses, claims, damages or
liabilities (or actions in respect thereof) referred to therein, then each
indemnifying party shall contribute to the amount paid or payable by such
indemnified party as a result of such losses, claims, damages or liabilities (or
actions in respect thereof) in such proportion as is appropriate to reflect the
relative benefits received by the Company and the Selling Stockholders on the
one hand and the Underwriters on the other from the offering of the Shares.  If,
however, the allocation provided by the immediately preceding sentence is not
permitted by applicable law or if the indemnified party failed to 

                                      -16-
<PAGE>
 
give the notice required under subsection (c) above, then each indemnifying
party shall contribute to such amount paid or payable by such indemnified party
in such proportion as is appropriate to reflect not only such relative benefits
but also the relative fault of the Company and the Selling Stockholders on the
one hand and the Underwriters on the other in connection with the statements or
omissions which resulted in such losses, claims, damages or liabilities (or
actions in respect thereof), as well as any other relevant equitable
considerations. The relative benefits received by the Company and the Selling
Stockholders on the one hand and the Underwriters on the other shall be deemed
to be in the same proportion as the total net proceeds from the offering (before
deducting expenses) received by the Company and the Selling Stockholders bear to
the total underwriting discounts and commissions received by the Underwriters,
in each case as set forth in the table on the cover page of the Prospectus. The
relative fault shall be determined by reference to, among other things, whether
the untrue or alleged untrue statement of a material fact or the omission or
alleged omission to state a material fact relates to information supplied by the
Company or the Selling Stockholders on the one hand or the Underwriters on the
other and the parties' relative intent, knowledge, access to information and
opportunity to correct or prevent such statement or omission. The Company, each
of the Selling Stockholders and the Underwriters agree that it would not be just
and equitable if contributions pursuant to this subsection (d) were determined
by pro rata allocation (even if the Underwriters were treated as one entity for
such purpose) or by any other method of allocation which does not take account
of the equitable considerations referred to above in this subsection (d). The
amount paid or payable by an indemnified party as a result of the losses,
claims, damages or liabilities (or actions in respect thereof) referred to above
in this subsection (d) shall be deemed to include any legal or other expenses
reasonably incurred by such indemnified party in connection with investigating
or defending any such action or claim. Notwithstanding the provisions of this
subsection (d), no Underwriter shall be required to contribute any amount in
excess of the amount by which the total price at which the Shares underwritten
by it and distributed to the public were offered to the public exceeds the
amount of any damages which such Underwriter has otherwise been required to pay
by reason of such untrue or alleged untrue statement or omission or alleged
omission. No person guilty of fraudulent misrepresentation (within the meaning
of Section 11(f) of the Act) shall be entitled to contribution from any person
who was not guilty of such fraudulent misrepresentation. The Underwriters'
obligations in this subsection (d) to contribute are several in proportion to
their respective underwriting obligations and not joint.

          (f)  The obligations of the Company and the Selling Stockholders under
this Section 8 shall be in addition to any liability which the Company and the
respective Selling Stockholders may otherwise have and shall extend, upon the
same terms and conditions, to each person, if any, who controls any Underwriter
within the meaning of the Act; and the obligations of the Underwriters under
this Section 8 shall be in addition to any liability which the respective
Underwriters may otherwise have and shall extend, upon the same terms and
conditions, to each officer and director of the Company (including any person
who, with his or her consent, is named in the Registration Statement as about to
become a director of the Company) and to each person, if any, who controls the
Company or any Selling Stockholder within the meaning of the Act.

     9.   (a)  If any Underwriter shall default in its obligation to purchase
the Shares which it has agreed to purchase hereunder at a Time of Delivery, you
may in your discretion arrange for you or another party or other parties to
purchase such Shares on the terms contained herein. If within thirty-six hours
after such default by any Underwriter you do not arrange for the purchase of
such Shares, then the Company and the Selling Stockholders shall be entitled to
a further period of thirty-six hours within which to procure another party or
other parties satisfactory to you to purchase such Shares on such terms. In the
event that, within the respective prescribed periods, you notify the Company and
the Selling Stockholders that you have so arranged for the purchase of such
Shares, or the Company and the Selling Stockholders notify you that they have so
arranged for the purchase of such Shares, you or the Company and the Selling
Stockholders shall have the right to postpone a Time of Delivery for a period of
not more than seven days, in order to effect whatever changes may thereby be
made 

                                      -17-
<PAGE>
 
necessary in the Registration Statement or the Prospectus, or in any other
documents or arrangements, and the Company agrees to file promptly any
amendments to the Registration Statement or the Prospectus which in your opinion
may thereby be made necessary. The term "Underwriter" as used in this Agreement
shall include any person substituted under this Section with like effect as if
such person had originally been a party to this Agreement with respect to such
Shares.

          (b)  If, after giving effect to any arrangements for the purchase of
the Shares of a defaulting Underwriter or Underwriters by you and the Company
and the Selling Stockholders as provided in subsection (a) above, the aggregate
number of such Shares which remains unpurchased does not exceed one-eleventh of
the aggregate number of all the Shares to be purchased at such Time of Delivery,
then the Company and the Selling Stockholders shall have the right to require
each non-defaulting Underwriter to purchase the number of Shares which such
Underwriter agreed to purchase hereunder at such Time of Delivery and, in
addition, to require each non-defaulting Underwriter to purchase its pro rata
share (based on the number of Shares which such Underwriter agreed to purchase
hereunder) of the Shares of such defaulting Underwriter or Underwriters for
which such arrangements have not been made; but nothing herein shall relieve a
defaulting Underwriter from liability for its default.

          (c)  If, after giving effect to any arrangements for the purchase of
the Shares of a defaulting Underwriter or Underwriters by you and the Company
and the Selling Stockholders as provided in subsection (a) above, the aggregate
number of such Shares which remains unpurchased exceeds one-eleventh of the
aggregate number of all of the Shares to be purchased at such Time of Delivery,
or if the Company and the Selling Stockholders shall not exercise the right
described in subsection (b) above to require non-defaulting Underwriters to
purchase Shares of a defaulting Underwriter or Underwriters, then this Agreement
(or, with respect to the Second Time of Delivery, the obligations of the
Underwriters to purchase and of the Company and the Selling Stockholders to sell
the Optional Shares) shall thereupon terminate, without liability on the part of
any non-defaulting Underwriter or the Company or the Selling Stockholders,
except for the expenses to be borne by the Company and the Selling Stockholders
and the Underwriters as provided in Section 6 hereof and the indemnity and
contribution agreements in Section 8 hereof; but nothing herein shall relieve a
defaulting Underwriter from liability for its default.

     10.  The respective indemnities, agreements, representations, warranties
and other statements of the Company, the Selling Stockholders and the several
Underwriters, as set forth in this Agreement or made by or on behalf of them,
respectively, pursuant to this Agreement, shall remain in full force and effect,
regardless of any investigation (or any statement as to the results thereof)
made by or on behalf of any Underwriter or any controlling person of any
Underwriter, or the Company, or any of the Selling Stockholders, or any officer
or director or controlling person of the Company, or any controlling person of
any Selling Stockholder, and shall survive delivery of and payment for the
Shares.

     11.  If this Agreement shall be terminated pursuant to Section 9 hereof,
neither the Company nor the Selling Stockholders shall then be under any
liability to any Underwriter except as provided in Sections 6 and 8 hereof; but,
if for any other reason any Shares are not delivered by or on behalf of the
Company and the Selling Stockholders as provided herein, the Company will
reimburse the Underwriters through you for all out-of-pocket expenses approved
in writing by you, including fees and disbursements of counsel, reasonably
incurred by the Underwriters in making preparations for the purchase, sale and
delivery of the Shares not so delivered, but the Company and the Selling
Stockholders shall then be under no further liability to any Underwriter in
respect of the Shares not so delivered except as provided in Sections 6 and 8
hereof.

     12.  In all dealings hereunder, you shall act on behalf of each of the
Underwriters, and the parties hereto shall be entitled to act and rely upon any
statement, request, notice or agreement on behalf of any Underwriter made or
given by you jointly or by Goldman, Sachs & Co. on behalf of you as 

                                      -18-
<PAGE>
 
the representatives; and in all dealings with any Selling Stockholder hereunder,
you and the Company shall be entitled to act and rely upon any statement,
request, notice or agreement on behalf of such Selling Stockholder made or given
by any or all of the Attorneys-in-Fact for such Selling Stockholder.

     All statements, requests, notices and agreements hereunder shall be in
writing, and if to the Underwriters shall be delivered or sent by mail, telex or
facsimile transmission to you as the representatives in care of Goldman, Sachs &
Co., 85 Broad Street, New York, New York 10004, Attention: Registration
Department; if to any Selling Stockholder shall be delivered or sent by mail,
telex or facsimile transmission to counsel for such Selling Stockholder at its
address set forth in Schedule II hereto; and if to the Company shall be
delivered or sent by mail, telex or facsimile transmission to the address of the
Company set forth in the Registration Statement, Attention: Secretary; provided,
however, that any notice to an Underwriter pursuant to Section 8(c) hereof shall
be delivered or sent by mail, telex or facsimile transmission to such
Underwriter at its address set forth in its Underwriters' Questionnaire or telex
constituting such Questionnaire, which address will be supplied to the Company
or the Selling Stockholders by you on request.  Any such statements, requests,
notices or agreements shall take effect upon receipt thereof.

     13.  This Agreement shall be binding upon, and inure solely to the benefit
of, the Underwriters, the Company and the Selling Stockholders and, to the
extent provided in Sections 8 and 10 hereof, the officers and directors of the
Company and each person who controls the Company, any Selling Stockholder or any
Underwriter, and their respective heirs, executors, administrators, successors
and assigns, and no other person shall acquire or have any right under or by
virtue of this Agreement.  No purchaser of any of the Shares from any
Underwriter shall be deemed a successor or assign by reason merely of such
purchase.

     14.  Time shall be of the essence of this Agreement.  As used herein, the
term "business day" shall mean any day when the Commission's office in
Washington, D.C.  is open for business.

     15.  This Agreement shall be governed by and construed in accordance with
the laws of the State of New York.

     16.  This Agreement may be executed by any one or more of the parties
hereto in any number of counterparts, each of which shall be deemed to be an
original, but all such counterparts shall together constitute one and the same
instrument.

     If the foregoing is in accordance with your understanding, please sign and
return to us one for the Company and each of the Representatives plus one for
each counsel and the Custodian, if any counterparts hereof, and upon the
acceptance hereof by you, on behalf of each of the Underwriters, this letter and
such acceptance hereof shall constitute a binding agreement among each of the
Underwriters, the Company and each of the Selling Stockholders.  It is
understood that your acceptance of this letter on behalf of each of the
Underwriters is pursuant to the authority set forth in a form of Agreement among
Underwriters, the form of which shall be submitted to the Company and the
Selling Stockholders for examination, upon request, but without warranty on your
part as to the authority of the signers thereof.

                                      -19-
<PAGE>
 
     Any person executing and delivering this Agreement as Attorney-in-Fact for
a Selling Stockholder represents by so doing that he has been duly appointed as
Attorney-in-Fact by such Selling Stockholder pursuant to a validly existing and
binding Power-of-Attorney which authorizes such Attorney-in-Fact to take such
action.

                                    Very truly yours,

                                    Inktomi Corporation

                                    By:      
                                       ----------------------------
                                       Name:  David C. Peterschmidt 
                                       Title: President and 
                                              Chief Executive Offier
 
                                                                   
                                    David A. Brewer 
                                    United Capital Group LP
                                    Thomas Lamar
                                    Adam Sah
                                    Pittiglio Rabin Todd & McGrath
                                    David Bernstein 
                                                                   
                                    By:
                                       ----------------------------
                                       Name: David C. Peterschmidt
                                       Title:
                                       As Attorney-in-Fact acting on behalf of
                                        each of the Selling Stockholders named
                                        in Schedule II to this Agreement.

Accepted as of the date hereof at New York, New York,


Goldman, Sachs & Co.
BT Alex. Brown
Hambrecht & Quist LLC

By:
   --------------------------------
          (Goldman, Sachs & Co.)

On behalf of each of the Underwriters
  
                                      -20-
<PAGE>
 
                                  SCHEDULE I

<TABLE> 
<CAPTION> 
                                                                          NUMBER OF OPTIONAL
                                                                            SHARES TO BE
                                                 TOTAL NUMBER OF             PURCHASED IF
                                                  FIRM  SHARES             MAXIMUM OPTION
          UNDERWRITER                           TO BE PURCHASED               EXERCISED
          -----------                           ---------------               ---------
<S>                                             <C>                           <C>
Goldman, Sachs & Co.....................            558,000                       83,700
BT Alex. Brown Incorporated.............            558,000                       83,700
Hambrecht & Quist LLC...................            558,000                       83,700
Advest, Inc.............................             50,000                        7,500
BancAmerica Robertson Stephens..........             95,000                       14,250
Dain Rauscher Wessels...................             50,000                        7,500
Deutsche Bank Securities Inc............             95,000                       14,250
Jesup & Lamont, Securities Corporation..             50,000                        7,500
Merrill Lynch, Pierce, Fenner & Smith
Incorporated............................             95,000                       14,250
NationsBanc Montogomery Securities LLC..             95,000                       14,250
Sutro & Co. Incorporated................             50,000                        7,500

          Total.........................          2,254,000                      338,100
</TABLE>

                                      -21-
<PAGE>
 
                                  SCHEDULE II

<TABLE> 
<CAPTION> 
                                                                               NUMBER OF OPTIONAL
                                                                                  SHARES TO BE
                                                          TOTAL NUMBER OF            SOLD IF
                                                            FIRM SHARES          MAXIMUM OPTION
                                                             TO BE SOLD             EXERCISED
                                                         ------------------  -----------------------
<S>                                                      <C>                 <C>
The Company...........................................       2,018,397               338,100
    The Selling Stockholder(s):....................... 
           David A. Brewer............................          50,000                     0
           United Capital Group LP....................         100,000                     0
           Thomas Lamar...............................          35,936                     0
           Adam Sah...................................           5,000                     0
           Pittiglio Rabin Todd & McGrath.............          43,334                     0
           David Bernstein............................           1,333                     0
    Total.............................................       2,254,000               338,100
</TABLE>

 .........

                                      -22-
<PAGE>
 
                                                                         ANNEX I


     Pursuant to Section 7(e) of the Underwriting Agreement, the accountants
shall furnish letters to the Underwriters to the effect that:

          (i)   They are independent certified public accountants with respect
     to the Company and its subsidiaries within the meaning of the Act and the
     applicable published rules and regulations thereunder;

          (ii)  In their opinion, the financial statements and any supplementary
     financial information and schedules (and, if applicable, financial
     forecasts and/or pro forma financial information) examined by them and
     included in the Prospectus or the Registration Statement comply as to form
     in all material respects with the applicable accounting requirements of the
     Act and the related published rules and regulations thereunder; and, if
     applicable, they have made a review in accordance with standards
     established by the American Institute of Certified Public Accountants of
     the unaudited consolidated interim financial statements, selected financial
     data, pro forma financial information, financial forecasts and/or condensed
     financial statements derived from audited financial statements of the
     Company for the periods specified in such letter, as indicated in their
     reports thereon, copies of which have been furnished to the representatives
     of the Underwriters (the "Representatives");

          (iii) They have made a review in accordance with standards established
     by the American Institute of Certified Public Accountants of the unaudited
     condensed consolidated statements of income, consolidated balance sheets
     and consolidated statements of cash flows included in the Prospectus as
     indicated in their reports thereon, copies of which have been furnished to
     the Representatives, and on the basis of specified procedures including
     inquiries of officials of the Company who have responsibility for financial
     and accounting matters regarding whether the unaudited condensed
     consolidated financial statements referred to in paragraph (vi)(A)(i) below
     comply as to form in all material respects with the applicable accounting
     requirements of the Act and the related published rules and regulations,
     nothing came to their attention that caused them to believe that the
     unaudited condensed consolidated financial statements do not comply as to
     form in all material respects with the applicable accounting requirements
     of the Act and the related published rules and regulations;

          (iv)  The unaudited selected financial information with respect to the
     consolidated results of operations and financial position of the Company
     for the five most recent fiscal years included in the Prospectus agrees
     with the corresponding amounts (after restatements where applicable) in the
     audited consolidated financial statements for such five fiscal years,
     copies of which have been furnished to the Representatives;


          (v)   They have compared the information in the Prospectus under
     selected captions with the disclosure requirements of Regulation S-K and on
     the basis of limited procedures specified in such letter nothing came to
     their attention as a result of the foregoing procedures that caused them to
     believe that this information does not conform in all material respects
     with the disclosure requirements of Items 301, 302, 402 and 503(d),
     respectively, of Regulation S-K;

          (vi)  On the basis of limited procedures, not constituting an
     examination in accordance with generally accepted auditing standards,
     consisting of a reading of the unaudited financial statements and other
     information referred to below, a reading of the latest available interim
     financial statements of the Company and its subsidiaries, inspection of the
     minute books of the Company and its subsidiaries since the date of the
     latest audited financial statements included in 

                                      -23-
<PAGE>
 
     the Prospectus, inquiries of officials of the Company and its subsidiaries
     responsible for financial and accounting matters and such other inquiries
     and procedures as may be specified in such letter, nothing came to their
     attention that caused them to believe that:

               (A)  (i)  the unaudited consolidated statements of income,
          consolidated balance sheets and consolidated statements of cash flows
          included in the Prospectus do not comply as to form in all material
          respects with the applicable accounting requirements of the Act and
          the related published rules and regulations, or (ii) any material
          modifications should be made to the unaudited condensed consolidated
          statements of income, consolidated balance sheets and consolidated
          statements of cash flows included in the Prospectus for them to be in
          conformity with generally accepted accounting principles;

               (B)  any other unaudited income statement data and balance sheet
          items included in the Prospectus do not agree with the corresponding
          items in the unaudited consolidated financial statements from which
          such data and items were derived, and any such unaudited data and
          items were not determined on a basis substantially consistent with the
          basis for the corresponding amounts in the audited consolidated
          financial statements included in the Prospectus;

               (C)  the unaudited financial statements which were not included
          in the Prospectus but from which were derived any unaudited condensed
          financial statements referred to in Clause (A) and any unaudited
          income statement data and balance sheet items included in the
          Prospectus and referred to in Clause (B) were not determined on a
          basis substantially consistent with the basis for the audited
          consolidated financial statements included in the Prospectus;

               (D)  any unaudited pro forma consolidated condensed financial
          statements included in the Prospectus do not comply as to form in all
          material respects with the applicable accounting requirements of the
          Act and the published rules and regulations thereunder or the pro
          forma adjustments have not been properly applied to the historical
          amounts in the compilation of those statements;

               (E)  as of a specified date not more than five days prior to the
          date of such letter, there have been any changes in the consolidated
          capital stock (other than issuances of capital stock upon exercise of
          options and stock appreciation rights, upon earn-outs of performance
          shares and upon conversions of convertible securities, in each case
          which were outstanding on the date of the latest financial statements
          included in the Prospectus) or any increase in the consolidated long-
          term debt of the Company and its subsidiaries, or any decreases in
          consolidated net current assets or stockholders' equity or other items
          specified by the Representatives, or any increases in any items
          specified by the Representatives, in each case as compared with
          amounts shown in the latest balance sheet included in the Prospectus,
          except in each case for changes, increases or decreases which the
          Prospectus discloses have occurred or may occur or which are described
          in such letter; and

               (F)  for the period from the date of the latest financial
          statements included in the Prospectus to the specified date referred
          to in Clause (E) there were any decreases in consolidated net revenues
          or operating profit or the total or per share amounts of consolidated
          net income or other items specified by the Representatives, or any
          increases in any items specified by the Representatives, in each case
          as compared with

                                      -24-
<PAGE>
 
          the comparable period of the preceding year and with
          any other period of corresponding length specified by the
          Representatives, except in each case for decreases or increases which
          the Prospectus discloses have occurred or may occur or which are
          described in such letter; and

          (vii)  In addition to the examination referred to in their report(s)
     included in the Prospectus and the limited procedures, inspection of minute
     books, inquiries and other procedures referred to in paragraphs (iii) and
     (vi) above, they have carried out certain specified procedures, not
     constituting an examination in accordance with generally accepted auditing
     standards, with respect to certain amounts, percentages and financial
     information specified by the Representatives, which are derived from the
     general accounting records of the Company and its subsidiaries, which
     appear in the Prospectus, or in Part II of, or in exhibits and schedules
     to, the Registration Statement specified by the Representatives, and have
     compared certain of such amounts, percentages and financial information
     with the accounting records of the Company and its subsidiaries and have
     found them to be in agreement.

                                      -25-

<PAGE>
 
                                                                   EXHIBIT 5.1
                       WILSON SONSINI GOODRICH & ROSATI
                           Professional Corporation
                              650 Page Mill Road
                       Palo Alto, California  94304-1050
              Telephone (650) 493-9300  Facsimile  (650) 493-6811

                                June 11, 1998


Inktomi Corporation
1900 S. Norfolk Street, Suite 310
San Mateo, California  94403

          RE:  REGISTRATION STATEMENT ON FORM S-1

Ladies and Gentlemen:

     We have examined the Registration Statement on Form S-1 initially filed
by you with the Securities and Exchange Commission on April 16, 1998, as
subsequently amended (the "Registration Statement") in connection with the
registration under the Securities Act of 1933, as amended, of 2,254,000 shares
of Common Stock of Inktomi Corporation (the "Shares"). As your counsel in
connection with this transaction, we have examined the proceedings proposed to
be taken in connection with said sale and issuance of the Shares.

     It is our opinion that, upon completion of the proceedings being taken or 
contemplated by us, as your counsel, to be taken prior to the issuance of the 
Shares, and upon completion of the proceedings being taken in order to permit 
such transactions to be carried out in accordance with the securities laws of 
various states, where required, the Shares when issued and sold in the manner 
referred to in the Registration Statement will be legally and validly issued, 
fully paid and nonassessable.

     We consent to the use of this opinion as an exhibit to the Registration 
Statement, and further consent to the use of our name wherever appearing in the 
Registration Statement, including the prospectus constituting a part thereof, 
and any amendment thereto.

                              Very truly yours,

                              WILSON, SONSINI, GOODRICH & ROSATI
                              Professional Corporation


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