Document:

<PAGE>

                                                                     EXHIBIT 4.1

================================================================================

                           VARCO INTERNATIONAL, INC.

                                      and

                   CHASEMELLON SHAREHOLDER SERVICES, L.L.C.

                                as Rights Agent

                               RIGHTS AGREEMENT

                         Dated as of November 29, 2000

================================================================================
<PAGE>

                               RIGHTS AGREEMENT
                               ----------------

          Rights Agreement, dated as of November 29, 2000, between Varco
International, Inc., a Delaware corporation (the "Company"), and ChaseMellon
Shareholder Services, L.L.C., a New Jersey limited liability company, as Rights
Agent (the "Rights Agent").

                                   RECITALS
                                   --------

          WHEREAS, on November 9, 2000, the Board of Directors of the Company
(the "Board of Directors") adopted this Rights Agreement (the "Agreement"), and
has authorized and declared a dividend of one preferred share purchase right (a
"Right") for each Common Share (as defined in Section 1.6) of the Company
outstanding at the close of business on December 4, 2000 (the "Record Date") and
has authorized and directed the issuance of one Right (subject to adjustment as
provided herein) with respect to each Common Share that shall become outstanding
between the Record Date and the earliest of the Distribution Date and the
Expiration Date (as such terms are defined in Sections 3.1 and 7.1,
respectively), each Right initially representing the right to purchase one one-
hundredth (subject to adjustment) of a share of Series A Junior Participating
Preferred Stock (the "Preferred Shares") of the Company having the rights,
powers and preferences set forth in the form of Certificate of Designation
attached hereto as Exhibit A, upon the terms and subject to the conditions
hereinafter set forth; provided, however, that Rights may be issued with respect
to Common Shares that shall become outstanding after the Distribution Date and
prior to the Expiration Date in accordance with Section 22.

          NOW, THEREFORE, in consideration of the premises and the mutual
agreements herein set forth, the parties hereby agree as follows:

          1.       Certain Definitions.  For purposes of this Agreement, the
                   -------------------
following terms have the meanings indicated:

          1.1      "Acquiring Person" shall mean any Person (as such term is
hereinafter defined) who or which, together with all Affiliates and Associates
(as such terms are hereinafter defined) of such Person, shall be the Beneficial
Owner (as such term is hereinafter defined) of 15% or more of the Common Shares
of the Company then outstanding but shall not include (i) an Exempt Person (as
such term is hereinafter defined) or (ii) any Existing Holder. "Existing Holder"
shall mean L.E. Simmons, together with all of his Affiliates and Associates,
including, without limitation D.O.S. Partners, L.P., SCF-III, L.P., FGSI
Partners, L.P., SCF Partners, L.P. and L.E. Simmons & Associates, Incorporated.
Notwithstanding the foregoing, no Person shall become an "Acquiring Person" as
the result of an acquisition of Common Shares by the Company which, by reducing
the number of shares outstanding, increases the proportionate number of shares
beneficially owned by such Person to 15% or more of the Common Shares of the
Company then outstanding; provided, however, that if a Person shall become the
Beneficial Owner of 15% or more of the Common Shares of the Company then
outstanding solely by reason of share purchases by the Company and shall, after
such share purchases by the Company, become the Beneficial Owner of one or more
additional Common Shares of the Company (other

                                       1
<PAGE>

than pursuant to a dividend or distribution paid or made by the Company on the
outstanding Common Shares in Common Shares or pursuant to a split or subdivision
of the outstanding Common Shares), then such Person shall be deemed to be an
"Acquiring Person," unless upon becoming the Beneficial Owner of such additional
shares of Common Stock such Person does not beneficially own 15% or more of the
shares of Common Stock then outstanding. Notwithstanding the foregoing, if the
Board of Directors of the Company determines in good faith that a Person who
would otherwise be an "Acquiring Person," as defined pursuant to the foregoing
provisions of this Section 1.1, has become such inadvertently (including,
without limitation, because (A) such Person was unaware that it beneficially
owned a percentage of Common Stock that would otherwise cause such Person to be
an "Acquiring Person" or (B) such Person was aware of the extent of its
Beneficial Ownership of Common Stock but had no actual knowledge of the
consequences of such Beneficial Ownership under this Agreement), and without any
intention of changing or influencing control of the Company, and such Person
divests as promptly as practicable a sufficient number of Common Shares so that
such Person would no longer be an Acquiring Person, as defined pursuant to the
foregoing provisions of this Section 1.1, then such Person shall not be deemed
to be or have become an "Acquiring Person" at any time for any purposes of this
Agreement. For all purposes of this Agreement, any calculation of the number of
Common Shares outstanding at any particular time, including for purposes of
determining the particular percentage of such outstanding Common Shares of which
any Person is the Beneficial Owner, shall be made in accordance with the last
sentence of Rule 13d-3(d)(1)(i) of the General Rules and Regulations under the
Securities Exchange Act of 1934, as amended (the "Exchange Act"), as in effect
on the date of this Agreement.

          1.2  "Affiliate" and "Associate" shall have the respective meanings
ascribed to such terms in Rule 12b-2 of the General Rules and Regulations, under
the Exchange Act, as in effect on the date of this Agreement.

          1.3  A Person shall be deemed the "Beneficial Owner" of and shall be
deemed to "beneficially own" any securities:

               (i)  which such Person or any of such Person's Affiliates or
Associates beneficially owns, directly or indirectly (as determined pursuant to
Rule 13d-3 of the General Rules and Regulations under the Exchange Act as in
effect on the date of this Agreement);

               (ii) which such Person or any of such Person's Affiliates or
Associates, directly or indirectly, has (A) the right to acquire (whether such
right is exercisable immediately, or only after the passage of time, compliance
with regulatory requirements, fulfillment of a condition or otherwise) pursuant
to any agreement, arrangement or understanding, whether or not in writing (other
than customary agreements with and between underwriters and selling group
members with respect to a bona fide public offering of securities), or upon the
exercise of conversion rights, exchange rights, rights, warrants or options, or
otherwise; provided, however, that a Person shall not be deemed the Beneficial
Owner of, or to beneficially own, (w) securities tendered pursuant to a tender
or exchange offer made by or on behalf of such Person or any of such Person's
Affiliates or Associates until such tendered securities are accepted for
purchase or exchange, (x) securities which such Person has a right to acquire
upon the exercise of Rights at

                                       2
<PAGE>

any time prior to the time that any Person becomes an Acquiring Person, (y)
securities issuable upon the exercise of Rights from and after the time that any
Person becomes an Acquiring Person if such Rights were acquired by such Person
or any of such Person's Affiliates or Associates prior to the Distribution Date
or pursuant to Section 3.1 or Section 22 ("Original Rights") or pursuant to
Section 11.9 or Section 11.15 with respect to an adjustment to Original Rights
or (z) securities which such Person or any of such Person's Affiliates or
Associates may acquire, does or do acquire or may be deemed to acquire or may be
deemed to have the right to acquire, pursuant to any merger or other acquisition
agreement between the Company and such Person (or one or more of such Person's
Affiliates or Associates) if prior to such Person becoming an Acquiring Person
the Board of Directors of the Company has approved such agreement and determined
that such Person shall not be or be deemed to be the Beneficial Owner of such
securities within the meaning of this Section 1.3; or (B) the right to vote
pursuant to any agreement, arrangement or understanding (whether or not in
writing); provided, however, that a Person shall not be deemed the Beneficial
Owner of, or to beneficially own, any security under this clause (B) if the
agreement, arrangement or understanding to vote such security (1) arises solely
from a revocable proxy or consent given to such Person in response to a public
proxy or consent solicitation made pursuant to, and in accordance with, the
applicable rules and regulations of the Exchange Act and (2) is not also then
reportable on Schedule 13D under the Exchange Act (or any comparable or
successor report); or

               (iii) which are beneficially owned, directly or indirectly, by
any other Person (or any Affiliate or Associate thereof) and with respect to
which such Person or any of such Person's Affiliates or Associates has any
agreement, arrangement or understanding (other than customary agreements with
and between underwriters and selling group members with respect to a bona fide
public offering of securities), whether or not in writing, for the purpose of
acquiring, holding, voting (except pursuant to a revocable proxy or consent as
described in the proviso to Section 1.3(ii)(B)) or disposing of any securities
of the Company;

provided, however, that no Person who is an officer, director or employee of an
Exempt Person shall be deemed, solely by reason of such Person's status or
authority as such, to be the "Beneficial Owner" of, to have "Beneficial
Ownership" of or to "beneficially own" any securities that are "beneficially
owned" (as defined in this Section 1.3), including, without limitation, in a
fiduciary capacity, by an Exempt Person or by any other such officer, director
or employee of an Exempt Person.

          1.4  "Business Day" shall mean any day other than a Saturday, Sunday,
or a day on which banking institutions in the State of New York are authorized
or obligated by law or executive order to close.

          1.5  "close of business" on any given date shall mean 5:00 p.m., New
York time, on such date; provided, however, that if such date is not a Business
Day it shall mean 5:00 p.m., New York time, on the next succeeding Business Day.

          1.6  "Common Shares" when used with reference to the Company shall
mean the shares of common stock, par value $.01 per share, of the Company.
"Common Shares" when

                                       3
<PAGE>

used with reference to any Person other than the Company shall mean the capital
stock with the greatest voting power, or the equity securities or other equity
interest having power to control or direct the management, of such other Person
or, if such Person is a Subsidiary (as such term is hereinafter defined) of
another Person, the Person or Persons which ultimately control such first-
mentioned Person, and which has issued and outstanding such capital stock,
equity securities or equity interest.

          1.7    "Exempt Person" shall mean the Company, any Subsidiary of the
Company, in each case including, without limitation, its fiduciary capacity, or
any employee benefit plan of the Company or of any Subsidiary of the Company or
any entity or trustee holding shares of capital stock of the Company for or
pursuant to the terms of any such plan, or for the purpose of funding other
employee benefits for employees of the Company or any Subsidiary of the Company.

          1.8    "Person" shall mean any individual, partnership, joint venture,
limited liability company, firm, corporation, unincorporated organization,
association, trust or other entity, and shall include any successor (by merger
or otherwise) of such entity.

          1.9    "Shares Acquisition Date" shall mean the first date of public
announcement (which, for purposes of this definition, shall include, without
limitation, the filing of a report pursuant to Section 13(d) of the Exchange Act
or pursuant to a comparable successor statute) by the Company or an Acquiring
Person that an Acquiring Person has become such or that discloses information
which reveals the existence of an Acquiring Person or such earlier date as a
majority of the Board of Directors shall become aware of the existence of an
Acquiring Person.

          1.10   "Subsidiary" of any Person shall mean any corporation or other
Person of which a majority of the voting power of the voting equity securities
or equity interests is owned, of record or beneficially, directly or indirectly,
by such Person.

          1.11   A "Trigger Event" shall be deemed to have occurred upon any
Person becoming an Acquiring Person.

          1.12   The following terms shall have the meanings defined for such
terms in the Sections set forth below:

                    Term                      Section
                    ----                      -------

          Adjustment Shares                 11.1.2
          Acquiring Person                  26
          Agreement                         Recitals
          Board of Directors                Recitals
          common stock equivalent           11.1.3
          Company                           Recitals
          current per share market price    11.4

                                       4
<PAGE>

                     Term                              Section
                     ----                              -------

          Current Value                             11.1.3
          Distribution Date                         3.1
          equivalent preferred stock                11.2
          Exchange Act                              1.1
          Exchange Consideration                    27.1
          Existing Holder                           1.1
          Expiration Date                           7.1
          Final Expiration Date                     7.1
          Nasdaq                                    9
          Original Rights                           1.3(ii)(A)(y)
          Preferred Shares                          Recitals
          Principal Party                           13.2
          Purchase Price                            4
          Record Date                               Recitals
          Redemption Date                           7.1
          Redemption Price                          23.1
          Right                                     Recitals
          Right Certificate                         3.1
          Rights Agent                              Recitals
          Security                                  11.4
          Spread                                    11.1.3
          Substitution Period                       11.1.3
          Summary of Rights                         3.2
          Trading Day                               11.4.1

          2.   Appointment of Rights Agent.  The Company hereby appoints the
               ---------------------------
Rights Agent to act as agent for the Company in accordance with the terms and
conditions hereof, and the Rights Agent hereby accepts such appointment. The
Company may from time to time appoint such co-Rights Agents as it may deem
necessary or desirable upon ten (10) days prior written notice to the Rights
Agent. In the event the Company appoints one or more co-Rights Agents, the
respective duties of the Rights Agent and any co-Rights Agent shall be as the
Company shall determine. Contemporaneously with such appointment, if any, the
Company shall notify the Rights Agent thereof. The Rights Agent shall have no
duty to supervise and in no event shall be liable for, the acts or omissions of
any such Co-Rights Agent.

           3.  Issuance of Right Certificates.
               ------------------------------

          3.1  Rights Evidenced by Share Certificates.  Until the earlier of (i)
               --------------------------------------
the tenth day after the Shares Acquisition Date or (ii) the tenth Business Day
after the date of the commencement of, or first public announcement of the
intent of any Person (other than an Exempt Person or Existing Holder) to
commence, a tender or exchange offer the consummation of which would result in
any Person (other than an Exempt Person or Existing Holder) becoming the
Beneficial Owner of Common Shares aggregating 15% or more of the then
outstanding

                                       5
<PAGE>

Common Shares of the Company (the earlier of (i) and (ii) being herein referred
to as the "Distribution Date"), (x) the Rights (unless earlier expired, redeemed
or terminated) will be evidenced (subject to the provisions of Section 3.2) by
the certificates for Common Shares registered in the names of the holders
thereof (which certificates for Common Shares shall also be deemed to be Right
Certificates) and not by separate certificates, and (y) the Rights (and the
right to receive certificates therefor) will be transferable only in connection
with the transfer of the underlying Common Shares. The preceding sentence
notwithstanding, prior to the occurrence of a Distribution Date specified as a
result of an event described in clause (ii) (or such later Distribution Date as
the Board of Directors of the Company may select pursuant to this sentence), the
Board of Directors may postpone, one or more times, the Distribution Date which
would occur as a result of an event described in clause (ii) beyond the date set
forth in such clause (ii). Nothing herein shall permit such a postponement of a
Distribution Date after a Person becomes an Acquiring Person. As soon as
practicable after the Distribution Date, the Company shall promptly notify in
writing the Rights Agent thereof and provide the Rights Agent with the names and
addresses of all record holders of Common Shares, and the Company will prepare
and execute, and provide the Rights Agent with a list of shareholders (together
with all other necessary information), the Rights Agent will countersign and the
Company (or, if requested, the Rights Agent) will send, by first-class, postage-
prepaid mail, to each record holder of Common Shares as of the close of business
on the Distribution Date (other than any Acquiring Person or any Associate or
Affiliate of an Acquiring Person), at the address of such holder shown on the
records of the Company, one or more certificates for Rights, in substantially
the form of Exhibit B hereto (a "Right Certificate"), evidencing one Right
(subject to adjustment as provided herein) for each Common Share so held. As of
the Distribution Date, the Rights will be evidenced solely by such Right
Certificates.

          3.2  Summary of Rights.  On the Record Date or as soon as practicable
               ----------------
thereafter, the Company will send or cause to be sent a copy of a Summary of
Rights to Purchase Preferred Shares, in substantially the form attached hereto
as Exhibit C (the "Summary of Rights"), by first-class, postage-prepaid mail, to
each record holder of Common Shares as of the close of business on the Record
Date at the address of such holder shown on the records of the Company. With
respect to certificates for Common Shares outstanding as of the close of
business on the Record Date, until the Distribution Date (or the earlier
Expiration Date), the Rights will be evidenced by such certificates for Common
Shares registered in the names of the holders thereof together with a copy of
the Summary of Rights and the registered holders of the Common Shares shall also
be registered holders of the associated Rights. Until the Distribution Date (or
the earlier Expiration Date), the surrender for transfer of any certificate for
Common Shares outstanding at the close of business on the Record Date, with or
without a copy of the Summary of Rights, shall also constitute the transfer of
the Rights associated with the Common Shares represented thereby.

          3.3  New Certificates After Record Date.  Certificates for Common
               ----------------------------------
Shares which become outstanding (whether upon issuance out of authorized but
unissued Common Shares, disposition out of treasury or transfer or exchange of
outstanding Common Shares) after

                                       6
<PAGE>

the Record Date but prior to the earliest of the Distribution Date or the
Expiration Date, shall have impressed, printed, stamped, written or otherwise
affixed onto them the following legend:

     This certificate also evidences and entitles the holder hereof to
     certain rights as set forth in a Rights Agreement between Varco
     International, Inc. (the "Company") and ChaseMellon Shareholder
     Services, L.L.C., as Rights Agent, dated as of November 29, 2000,
     as the same may be amended from time to time (the "Agreement"),
     the terms of which are hereby incorporated herein by reference
     and a copy of which is on file at the principal executive offices
     of the Company. Under certain circumstances, as set forth in the
     Agreement, such Rights will be evidenced by separate certificates
     and will no longer be evidenced by this certificate. The Company
     will mail to the holder of this certificate a copy of the
     Agreement without charge after receipt of a written request
     therefor. As described in the Agreement, Rights which are owned
     by, transferred to or have been owned by Acquiring Persons or
     Associates or Affiliates thereof (as defined in the Agreement)
     shall become null and void and will no longer be transferable.

With respect to such certificates containing the foregoing legend, until the
Distribution Date (or the earlier Expiration Date), the Rights associated with
the Common Shares represented by such certificates shall be evidenced by such
certificates alone, and the surrender for transfer of any such certificates,
except as otherwise provided herein, shall also constitute the transfer of the
Rights associated with the Common Shares represented thereby. In the event that
the Company purchases or acquires any Common Shares after the Record Date but
prior to the Distribution Date, any Rights associated with such Common Shares
shall be deemed canceled and retired so that the Company shall not be entitled
to exercise any Rights associated with the Common Shares which are no longer
outstanding.

          Notwithstanding this Section 3.3, the omission of a legend shall not
affect the enforceability of any part of this Agreement or the rights of any
holder of the Rights.

          4.  Form of Right Certificates.  The Right Certificates (and the forms
              --------------------------
of election to purchase shares, certification and assignment to be printed on
the reverse thereof) shall be substantially the same as Exhibit B hereto and may
have such marks of identification or designation and such legends, summaries or
endorsements printed thereon as the Company may deem appropriate, provided that
such marks, legends, summaries and endorsements do not affect the rights, duties
or responsibilities of the Rights Agent, and as are not inconsistent with the
provisions of this Agreement, or as may be required to comply with any
applicable law or with any rule or regulation made pursuant thereto or with any
rule or regulation of any stock exchange or trading system on which the Rights
may from time to time be listed or quoted, or to conform to usage. Subject to
the terms and conditions hereof, the Right Certificates, whenever issued, shall
be dated as of the Record Date, and shall show the date of countersignature by
the Rights Agent, and on their face shall entitle the holders thereof to
purchase such number of one one-hundredths of a Preferred Share as shall be set
forth therein at the price per one one-hundredth of a Preferred Share set forth
therein (the "Purchase Price"), but the number of

                                       7
<PAGE>

such one one-hundredths of a Preferred Share and the Purchase Price shall be
subject to adjustment as provided herein.

          5.  Countersignature and Registration. The Right Certificates shall be
              ---------------------------------
executed on behalf of the Company by its Chairman of the Board of Directors, the
Chief Executive Officer, President or any Vice President, either manually or by
facsimile signature, and shall have affixed thereto the Company's seal or a
facsimile thereof which shall be attested by the Secretary or any Assistant
Secretary of the Company, either manually or by facsimile signature. The Right
Certificates shall be countersigned, either manually or by facsimile signature,
by an authorized signatory of the Rights Agent, but it shall not be necessary
for the same signatory to countersign all of the Right Certificates hereunder.
No Right Certificate shall be valid for any purpose unless so countersigned. In
case any officer of the Company who shall have signed any of the Right
Certificates shall cease to be such officer of the Company before
countersignature by the Rights Agent and issuance and delivery by the Company,
such Right Certificates, nevertheless, may be countersigned by the Rights Agent,
and issued and delivered by the Company with the same force and effect as though
the person who signed such Right Certificates had not ceased to be such officer
of the Company; and any Right Certificate may be signed on behalf of the Company
by any person who, at the actual date of the execution of such Right
Certificate, shall be a proper officer of the Company to sign such Right
Certificate, although at the date of the execution of this Agreement any such
person was not such an officer.

          Following the Distribution Date and receipt by the Rights Agent of all
relevant information, the Rights Agent will keep or cause to be kept, at its
office, designated for such purpose pursuant to Section 25, books for
registration and transfer of the Right Certificates issued hereunder. Such books
shall show the names and addresses of the respective holders of the Right
Certificates, the number of Rights evidenced on its face by each of the Right
Certificates, the certificate number of each of the Right Certificates and the
date of each of the Right Certificates.

          6.  Transfer, Split Up, Combination and Exchange of Right Certificates
              ------------------------------------------------------------------
Mutilated, Destroyed, Lost or Stolen Right Certificates.  Subject to the
-------------------------------------------------------
provisions of Section 11.1.2 and Section 14, at any time after the close of
business on the Distribution Date, and at or prior to the close of business on
the Expiration Date, any Right Certificate or Right Certificates (other than
Right Certificates representing Rights that have become null and void pursuant
to Section 11.1.2 or that have been exchanged pursuant to Section 27) may be
transferred, split up or combined or exchanged for another Right Certificate or
Right Certificates, entitling the registered holder to purchase a like number of
one one-hundredths of a Preferred Share as the Right Certificate or Right
Certificates surrendered then entitled such holder to purchase. Any registered
holder desiring to transfer, split up or combine or exchange any Right
Certificate shall make such request in writing delivered to the Rights Agent,
and shall surrender, together with any required form of assignment and
certificate duly completed, the Right Certificate or Right Certificates to be
transferred, split up or combined or exchanged at the office of the Rights Agent
designated for such purpose pursuant to Section 25. Neither the Rights Agent nor
the Company shall be obligated to take any action whatsoever with respect to the

                                       8
<PAGE>

transfer of any such surrendered Right Certificate or Right Certificates until
the registered holder shall have properly completed and signed the certificate
contained in the form of assignment on the reverse side of such Right
Certificate or Right Certificates and shall have provided such additional
evidence of the identity of the Beneficial Owner (or former Beneficial Owner) or
Affiliates or Associates thereof as the Company shall reasonably request.
Thereupon the Rights Agent shall countersign and deliver to the Person entitled
thereto a Right Certificate or Right Certificates, as the case may be, as so
requested. The Company may require payment from the holders of Right
Certificates of a sum sufficient to cover any tax or governmental charge that
may be imposed in connection with any transfer, split up or combination or
exchange of such Right Certificates. The Rights Agent shall have no duty or
obligation under this Section 6 or any other similar provision of this Agreement
unless and until it is satisfied that all such taxes and/or governmental charges
have been paid in full.

          Subject to the provisions of Section 11.1.2 , at any time after the
Distribution Date and prior to the Expiration Date, upon receipt by the Company
and the Rights Agent of evidence satisfactory to them of the loss, theft,
destruction or mutilation of a Right Certificate, and, in case of loss, theft or
destruction, of indemnity or security satisfactory to them, and, at the
Company's request, reimbursement to the Company and the Rights Agent of all
reasonable expenses incidental thereto, and upon surrender to the Rights Agent
and cancellation of the Right Certificate if mutilated, the Company will make
and deliver a new Right Certificate of like tenor to the Rights Agent for
countersignature and delivery to the registered owner in lieu of the Right
Certificate so lost, stolen, destroyed or mutilated.

          7.   Exercise of Rights; Purchase Price; Expiration Date of Rights.
               -------------------------------------------------------------

          7.1  Exercise of Rights.  Subject to Section 11.1.2 and except as
               ------------------
otherwise provided herein, the registered holder of any Right Certificate may
exercise the Rights evidenced thereby in whole or in part at any time after the
Distribution Date upon surrender of the Right Certificate, with the form of
election to purchase and certification on the reverse side thereof duly
executed, to the Rights Agent at the office of the Rights Agent designated for
such purpose pursuant to Section 25, together with payment of the aggregate
Purchase Price for the total number of one one-hundredths of a Preferred Share
(or other securities, cash or other assets) as to which the Rights are
exercised, at or prior to the time (the "Expiration Date") that is the earliest
of (i) the close of business on December 4, 2010 (the "Final Expiration Date"),
(ii) the time at which the Rights are redeemed as provided in Section 23 (the
"Redemption Date"), (iii) the closing of any merger or other acquisition
transaction involving the Company pursuant to an agreement of the type described
in Section 13.3 at which time the Rights are deemed terminated, or (iv) the time
at which the Rights are exchanged as provided in Section 27.

          7.2  Purchase.  The Purchase Price for each one one-hundredth of a
               --------
Preferred Share pursuant to the exercise of a Right shall be initially $75,
shall be subject to adjustment from time to time as provided in Sections 11, 13
and 26 and shall be payable in lawful money of the United States of America in
accordance with Section 7.3.

                                       9
<PAGE>

          7.3       Payment Procedures.  Upon receipt of a Right Certificate
                    ------------------
representing exercisable Rights, with the form of election to purchase and
certification duly executed, accompanied by payment of the aggregate Purchase
Price for the total number of one one-hundredths of a Preferred Share to be
purchased and an amount equal to any applicable tax or governmental charge
required to be paid by the holder of such Right Certificate in accordance with
Section 9, in cash or by certified or cashier's check or money order payable to
the order of the Company, the Rights Agent shall thereupon promptly (i)(A)
requisition from any transfer agent of the Preferred Shares (or make available,
if the Rights Agent is the transfer agent) certificates for the number of
Preferred Shares to be purchased and the Company hereby irrevocably authorizes
its transfer agent to comply with all such requests, or (B) if the Company shall
have elected to deposit the total number of Preferred Shares issuable upon
exercise of the Rights hereunder with a depository agent, requisition from the
depositary agent depositary receipts representing interests in such number of
one one-hundredths of a Preferred Share as are to be purchased (in which case
certificates for the Preferred Shares represented by such receipts shall be
deposited by the transfer agent with the depositary agent) and the Company
hereby directs the depositary agent to comply with all such requests, (ii) when
necessary to comply with this Agreement, requisition from the Company the amount
of cash to be paid in lieu of the issuance of fractional shares in accordance
with Section 14 or otherwise in accordance with Section 11.1.3, (iii) promptly
after receipt of such certificates or depositary receipts, cause the same to be
delivered to or upon the order of the registered holder of such Right
Certificate, registered in such name or names as may be designated by such
holder and (iv) when necessary to comply with this Agreement, after receipt,
promptly deliver such cash to or upon the order of the registered holder of such
Right Certificate.  In the event that the Company is obligated to issue other
securities of the Company, pay cash and/or distribute other property pursuant to
Section 11.1.3, the Company will make all arrangements necessary so that such
other securities, cash and/or other property are available for distribution by
the Rights Agent, if and when necessary to comply with this Agreement.

          7.4       Partial Exercise.  In case the registered holder of any
                    ----------------
Right Certificate shall exercise less than all the Rights evidenced thereby, a
new Right Certificate evidencing Rights equivalent to the Rights remaining
unexercised shall be issued by the Rights Agent and delivered to the registered
holder of such Right Certificate or to his duly authorized assigns, subject to
the provisions of Section 14.

          7.5       Full Information Concerning Ownership.  Notwithstanding
                    -------------------------------------
anything in this Agreement to the contrary, neither the Rights Agent nor the
Company shall be obligated to undertake any action with respect to a registered
holder of Rights upon the occurrence of any purported exercise as set forth in
this Section 7 unless the certificate contained in the form of election to
purchase set forth on the reverse side of the Right Certificate surrendered for
such exercise shall have been duly completed and signed by the registered holder
thereof and the Company shall have been provided with such additional evidence
of the identity of the Beneficial Owner (or former Beneficial Owner) or
Affiliates or Associates thereof as the Company shall reasonably request.

                                       10
<PAGE>

          8.        Cancellation and Destruction of Right Certificates.  All
                    --------------------------------------------------
Right Certificates surrendered for the purpose of exercise, transfer, split up,
combination or exchange shall, if surrendered to the Company or to any of its
agents, be delivered to the Rights Agent for cancellation or in canceled form,
or, if surrendered to the Rights Agent, shall be canceled by it, and no Right
Certificates shall be issued in lieu thereof except as expressly permitted by
any of the provisions of this Agreement.  The Company shall deliver to the
Rights Agent for cancellation and retirement, and the Rights Agent shall so
cancel and retire, any other Right Certificate purchased or acquired by the
Company otherwise than upon the exercise thereof.  The Rights Agent shall
deliver all canceled Right Certificates to the Company, or shall, at the written
request of the Company, destroy such canceled Right Certificates, and in such
case shall deliver a certificate of destruction thereof to the Company.

          9.        Reservation and Availability of Capital Stock.  The Company
                    ---------------------------------------------
covenants and agrees that from and after the Distribution Date it will cause to
be reserved and kept available out of its authorized and unissued Preferred
Shares (and, following the occurrence of a Trigger Event, out of its authorized
and unissued Common Shares or other securities or out of its shares held in its
treasury) the number of Preferred Shares (and, following the occurrence of a
Trigger Event, Common Shares and/or other securities) that will be sufficient to
permit the exercise in full of all outstanding Rights.

          So long as the Preferred Shares (and, following the occurrence of a
Trigger Event, Common Shares and/or other securities) issuable upon the exercise
of Rights may be listed on any national securities exchange or traded in the
over-the-counter market and quoted on the National Association of Securities
Dealers, Inc. Automated Quotation System ("Nasdaq") (including the National
Market or Small Cap Market), the Company shall use its best efforts to cause,
from and after such time as the Rights become exercisable, all shares reserved
for such issuance to be listed or admitted to trading on such exchange or quoted
on Nasdaq upon official notice of issuance upon such exercise.

          The Company covenants and agrees that it will take all such action as
may be necessary to ensure that all Preferred Shares (and, following the
occurrence of a Trigger Event, Common Shares  and/or other securities) delivered
upon exercise of Rights shall, at the time of delivery of the certificates for
such shares (subject to payment of the Purchase Price), be duly and validly
authorized and issued and fully paid and nonassessable shares.

          From and after such time as the Rights become exercisable, the Company
shall use its best efforts, if then necessary to permit the issuance of
Preferred Shares upon the exercise of Rights, to register and qualify such
Preferred Shares under the Securities Act and any applicable state securities or
"Blue Sky" laws (to the extent exemptions therefrom are not available), cause
such registration statement and qualifications to become effective as soon as
possible after such filing and keep such registration and qualifications
effective until the earlier of the date as of which the Rights are no longer
exercisable for such securities and the Expiration Date.  The Company may
temporarily suspend, for a period of time not to exceed 90 days, the
exercisability of the Rights in order to prepare and file a registration
statement under the Securities Act and permit it to become effective.  Upon any
such suspension, the Company shall

                                       11
<PAGE>

promptly notify the Rights Agent in writing thereof and issue a public
announcement stating that the exercisability of the Rights has been temporarily
suspended, as well as a public announcement at such time as the suspension is no
longer in effect (with prompt notice thereof to the Rights Agent).
Notwithstanding any provision of this Agreement to the contrary, the Rights
shall not be exercisable in any jurisdiction unless the requisite qualification
in such jurisdiction shall have been obtained and until a registration statement
under the Securities Act (if required) shall have been declared effective.

          The Company further covenants and agrees that it will pay when due and
payable any and all taxes and governmental charges which may be payable in
respect of the issuance or delivery of the Right Certificates or of any
Preferred Shares (or Common Shares and/or other securities, as the case may be)
upon the exercise of Rights.  The Company shall not, however, be required to pay
any tax or charge which may be payable in respect of any transfer or delivery of
Right Certificates to a Person other than, or the issuance or delivery of
certificates for the Preferred Shares (or Common Shares and/or other securities,
as the case may be) in a name other than that of, the registered holder of the
Right Certificate evidencing Rights surrendered for exercise or to issue or
deliver any certificates for Preferred Shares (or Common Shares and/or other
securities, as the case may be) in a name other than that of the registered
holder upon the exercise of any Rights until any such tax or charge shall have
been paid (any such tax or charge being payable by the holder of such Right
Certificate at the time of surrender) or until it has been established to the
Company's satisfaction that no such tax or charge is due.

          10.       Preferred Shares Record Date.  Each Person in whose name any
                    ----------------------------
certificate for Preferred Shares (or Common Shares and/or other securities, as
the case may be) is issued upon the exercise of Rights shall for all purposes be
deemed to have become the holder of record of the Preferred Shares (or Common
Shares and/or other securities, as the case may be) represented thereby on, and
such certificate shall be dated, the date upon which the Right Certificate
evidencing such Rights was duly surrendered and payment of the Purchase Price
(and any applicable taxes and governmental charges) was made; provided, however,
that if the date of such surrender and payment is a date upon which the
Preferred Shares (or Common Shares and/or other securities, as the case may be)
transfer books of the Company are closed, such Person shall be deemed to have
become the record holder of such shares (fractional or otherwise) on, and such
certificate shall be dated, the next succeeding Business Day on which the
Preferred Shares (or Common Shares and/or other securities, as the case may be)
transfer books of the Company are open.  Prior to the exercise of the Rights
evidenced thereby, the holder of a Right Certificate shall not be entitled to
any rights of a holder of Preferred Shares for which the Rights shall be
exercisable, including, without limitation, the right to vote or to receive
dividends or other distributions, and shall not be entitled to receive any
notice of any proceedings of the Company, except as provided herein.

          11.       Adjustment of Purchase Price, Number of Shares or Number of
                    -----------------------------------------------------------
Rights. The Purchase Price, the number of Preferred Shares or other securities
------
or property purchasable upon exercise of each Right and the number of Rights
outstanding are subject to adjustment from time to time as provided in this
Section 11.

                                       12
<PAGE>

          11.1      Post-Execution Events.
                    ---------------------

          11.1.1    Corporate Dividends, Reclassifications, Etc.  In the event
                    -------------------------------------------
the Company shall at any time after the date of this Agreement (A) declare and
pay a dividend on the Preferred Shares payable in Preferred Shares, (B)
subdivide the outstanding Preferred Shares, (C) combine the outstanding
Preferred Shares into a smaller number of Preferred Shares or (D) issue any
shares of its capital stock in a reclassification of the Preferred Shares
(including any such reclassification in connection with a consolidation or
merger in which the Company is the continuing or surviving corporation), except
as otherwise provided in this Section 11.1, the Purchase Price in effect at the
time of the record date for such dividend or of the effective date of such
subdivision, combination or reclassification, and the number and kind of shares
of capital stock issuable on such date, shall be proportionately adjusted so
that the holder of any Right exercised after such time shall be entitled to
receive the aggregate number and kind of shares of capital stock which, if such
Right had been exercised immediately prior to such date and at a time when the
Preferred Shares transfer books of the Company were open, he or she would have
owned upon such exercise and been entitled to receive by virtue of such
dividend, subdivision, combination or reclassification; provided, however, that
in no event shall the consideration to be paid upon the exercise of one Right be
less than the aggregate par value of the shares of capital stock of the Company
issuable upon exercise of one Right.  If an event occurs which would require an
adjustment under both Section 11.1.1 and Section 11.1.2, the adjustment provided
for in this Section 11.1.1 shall be in addition to, and shall be made prior to,
the adjustment required pursuant to, Section 11.1.2.

          11.1.2    Acquiring Person Events; Triggering Events.  Subject to
                    ------------------------------------------
Sections 23.1 and 27, in the event that a Trigger Event occurs, then, from and
after the first occurrence of such event, each holder of a Right, except as
provided below, shall thereafter have a right to receive, upon exercise thereof
at a price per Right equal to the then current Purchase Price multiplied by the
number of one one-hundredths of a Preferred Share for which a Right is then
exercisable (without giving effect to this Section 11.1.2), in accordance with
the terms of this Agreement and in lieu of Preferred Shares, such number of
Common Shares as shall equal the result obtained by (x) multiplying the then
current Purchase Price by the then number of one one-hundredths of a Preferred
Share for which a Right is then exercisable (without giving effect to this
Section 11.1.2) and (y) dividing that product by 50% of the current per share
market price of the Common Shares (determined pursuant to Section 11.4) on the
first of the date of the occurrence of, or the date of the first public
announcement of, a Trigger Event (the "Adjustment Shares"); provided that the
Purchase Price and the number of Adjustment Shares shall thereafter be subject
to further adjustment as appropriate in accordance with Section 11.6.
Notwithstanding the foregoing, upon the occurrence of a Trigger Event, any
Rights that are or were acquired or beneficially owned by (1) any Acquiring
Person or any Associate or Affiliate thereof, (2) a transferee of any Acquiring
Person (or of any such Associate or Affiliate) who becomes a transferee after
the Acquiring Person becomes such, or (3) a transferee of any Acquiring Person
(or of any such Associate or Affiliate) who becomes a transferee prior to or
concurrently with the Acquiring Person becoming such and receives such Rights
pursuant to either (A) a transfer (whether or not for consideration) from the
Acquiring Person to holders of equity interests in

                                       13
<PAGE>

such Acquiring Person or to any Person with whom the Acquiring Person has any
continuing agreement, arrangement or understanding regarding the transferred
Rights or (B) a transfer which the Board of Directors of the Company has
determined is part of an agreement, arrangement or understanding which has as a
primary purpose or effect avoidance of this Section 11.1.2, and subsequent
transferees, shall become null and void without any further action, and any
holder (whether or not such holder is an Acquiring Person or an Associate or
Affiliate of an Acquiring Person) of such Rights shall thereafter have no right
to exercise such Rights under any provision of this Agreement or otherwise. From
and after the Trigger Event, no Right Certificate shall be issued pursuant to
Section 3 or Section 6 that represents Rights that are or have become null and
void pursuant to the provisions of this paragraph, and any Right Certificate
delivered to the Rights Agent that represents Rights that are or have become
null and void pursuant to the provisions of this paragraph shall be canceled.

          The Company shall use all reasonable efforts to ensure that the
provisions of this Section 11.1.2 are complied with, but shall have no liability
to any holder of Right Certificates or other Person as a result of its failure
to make any determinations with respect to any Acquiring Person or its
Affiliates, Associates or transferees hereunder.

          From and after the occurrence of an event specified in Section 13.1,
any Rights that theretofore have not been exercised pursuant to this Section
11.1.2 shall thereafter be exercisable only in accordance with Section 13 and
not pursuant to this Section 11.1.2.

          11.1.3    Insufficient Shares.  The Company may at its option
                    -------------------
substitute for a Common Share issuable upon the exercise of Rights in accordance
with the foregoing Section 11.1.2 a number of Preferred Shares or fraction
thereof such that the current per share market price of one Preferred Share
multiplied by such number or fraction is equal to the current per share market
price of one Common Share.  In the event that upon the occurrence of a Trigger
Event there shall not be sufficient Common Shares authorized but unissued, or
held by the Company as treasury shares, to permit the exercise in full of the
Rights in accordance with the foregoing Section 11.1.2, the Company shall take
all such action as may be necessary to authorize additional Common Shares for
issuance upon exercise of the Rights, provided, however, that if the Company
determines that it is unable to cause the authorization of a sufficient number
of additional Common Shares, then, in the event the Rights become exercisable,
the Company, with respect to each Right and to the extent necessary and
permitted by applicable law and any agreements or instruments in effect on the
date hereof to which it is a party, shall:  (A) determine the excess of (1) the
value of the Adjustment Shares issuable upon the exercise of a Right (the
"Current Value"), over (2) the Purchase Price (such excess, the "Spread") and
(B) with respect to each Right (other than Rights which have become null and
void pursuant to Section 11.1.2), make adequate provision to substitute for the
Adjustment Shares, upon payment of the applicable Purchase Price, (1) cash, (2)
a reduction in the Purchase Price, (3) Preferred Shares or other equity
securities of the Company (including, without limitation, shares, or fractions
of shares, of preferred stock which, by virtue of having dividend and
liquidation rights substantially comparable to those of the Common Shares, the
Board of Directors of the Company has deemed in good faith to have substantially
the same value as

                                       14
<PAGE>

Common Shares) (each such share of preferred stock or fractions of shares of
preferred stock constituting a "common stock equivalent")), (4) debt securities
of the Company, (5) other assets or (6) any combination of the foregoing having
an aggregate value equal to the Current Value, where such aggregate value has
been determined by the Board of Directors of the Company based upon the advice
of a nationally recognized investment banking firm selected in good faith by the
Board of Directors of the Company; provided, however, that if the Company shall
not have made adequate provision to deliver value pursuant to clause (B) above
within thirty (30) days following the occurrence of a Trigger Event, then the
Company shall be obligated to deliver, to the extent necessary and permitted by
applicable law and any agreements or instruments in effect on the date hereof to
which it is a party, upon the surrender for exercise of a Right and without
requiring payment of the Purchase Price, Common Shares (to the extent available)
and then, if necessary, such number or fractions of Preferred Shares (to the
extent available) and then, if necessary, cash, which shares and/or cash have an
aggregate value equal to the Spread. If the Board of Directors of the Company
shall determine in good faith that it is unlikely that sufficient additional
Common Shares could be authorized for issuance upon exercise in full of the
Rights, the thirty (30) day period set forth above may be extended and re-
extended to the extent necessary, but not more than ninety (90) days following
the occurrence of a Trigger Event, in order that the Company may seek
stockholder approval for the authorization of such additional shares (such
period as may be extended, the "Substitution Period"). To the extent that the
Company determines that some action need be taken pursuant to the second and/or
third sentences of this Section 11.1.3, the Company (x) shall provide that such
action shall apply uniformly to all outstanding Rights, and (y) may suspend the
exercisability of the Rights until the expiration of the Substitution Period in
order to seek any authorization of additional shares and/or to decide the
appropriate form of distribution to be made pursuant to such first sentence and
to determine the value thereof. In the event of any such suspension, the Company
shall promptly notify the Rights Agent in writing thereof and issue a public
announcement stating that the exercisability of the Rights has been temporarily
suspended as well as a public announcement at such time as the suspension is no
longer in effect (with prompt notice thereof to the Rights Agent). For purposes
of this Section 11.1.3, the value of a Common Share shall be the current per
share market price (as determined pursuant to Section 11.4) on the date of the
occurrence of a Trigger Event and the value of any "common stock equivalent"
shall be deemed to have the same value as the Common Shares on such date. The
Board of Directors of the Company may, but shall not be required to, establish
procedures to allocate the right to receive Common Shares upon the exercise of
the Rights among holders of Rights pursuant to this Section 11.1.3.

          11.2      Dilutive Rights Offering.  In case the Company shall fix a
                    ------------------------
record date for the issuance of rights, options or warrants to all holders of
Preferred Shares entitling them (for a period expiring within 45 calendar days
after such record date) to subscribe for or purchase Preferred Shares (or
securities having the same rights, privileges and preferences as the Preferred
Shares ("equivalent preferred stock")) or securities convertible into Preferred
Shares or equivalent preferred stock at a price per Preferred Share or per share
of equivalent preferred stock (or having a conversion or exercise price per
share, if a security convertible into or exercisable for Preferred Shares or
equivalent preferred stock) less than the current per share market price of

                                       15
<PAGE>

the Preferred Shares (as determined pursuant to Section 11.4) on such record
date, the Purchase Price to be in effect after such record date shall be
determined by multiplying the Purchase Price in effect immediately prior to such
record date by a fraction, the numerator of which shall be the number of
Preferred Shares and shares of equivalent preferred stock outstanding on such
record date plus the number of Preferred Shares and shares of equivalent
preferred stock which the aggregate offering price of the total number of
Preferred Shares and/or shares of equivalent preferred stock to be offered
(and/or the aggregate initial conversion price of the convertible securities so
to be offered) would purchase at such current per share market price and the
denominator of which shall be the number of Preferred Shares and shares of
equivalent preferred stock outstanding on such record date plus the number of
additional Preferred Shares and/or shares of equivalent preferred stock to be
offered for subscription or purchase (or into which the convertible securities
so to be offered are initially convertible); provided, however, that in no event
shall the consideration to be paid upon the exercise of one Right be less than
the aggregate par value of the shares of capital stock of the Company issuable
upon exercise of one Right. In case such subscription price may be paid in a
consideration part or all of which shall be in a form other than cash, the value
of such consideration shall be as determined in good faith by the Board of
Directors of the Company, whose determination shall be described in a reasonably
detailed statement filed with the Rights Agent and shall be binding on the
Rights Agent and the holders of the Rights. Preferred Shares and shares of
equivalent preferred stock owned by or held for the account of the Company or
any Subsidiary of the Company shall not be deemed outstanding for the purpose of
any such computation. Such adjustments shall be made successively whenever such
a record date is fixed; and in the event that such rights or warrants are not so
issued, the Purchase Price shall be adjusted to be the Purchase Price which
would then be in effect if such record date had not been fixed.

          11.3      Distributions.  In case the Company shall fix a record date
                    -------------
for the making of a distribution to all holders of the Preferred Shares
(including any such distribution made in connection with a consolidation or
merger in which the Company is the continuing or surviving corporation) of
evidences of indebtedness, cash, securities or assets (other than a regular
periodic cash dividend at a rate not in excess of 125% of the rate of the last
regular periodic cash dividend theretofore paid or, in case regular periodic
cash dividends have not theretofore been paid, at a rate not in excess of 50% of
the average net income per share of the Company for the four quarters ended
immediately prior to the payment of such dividend, or a dividend payable in
Preferred Shares (which dividend, for purposes of this Agreement, shall be
subject to the provisions of Section 11.1.1(A))) or convertible securities, or
subscription rights or warrants (excluding those referred to in Section 11.2),
the Purchase Price to be in effect after such record date shall be determined by
multiplying the Purchase Price in effect immediately prior to such record date
by a fraction, the numerator of which shall be the current per share market
price of the Preferred Shares (as determined pursuant to Section 11.4) on such
record date, less the fair market value (as determined in good faith by the
Board of Directors of the Company, whose determination shall be described in a
reasonably detailed statement filed with the Rights Agent) of the portion of the
cash, assets, securities or evidences of indebtedness so to be distributed or of
such subscription rights or warrants applicable to one Preferred Share and the
denominator of which shall be such current per share market price of the
Preferred Shares (as determined

                                       16
<PAGE>

pursuant to Section 11.4); provided, however, that in no event shall the
consideration to be paid upon the exercise of one Right be less than the
aggregate par value of the shares of capital stock of the Company to be issued
upon exercise of one Right. Such adjustments shall be made successively whenever
such a record date is fixed; and in the event that such distribution is not so
made, the Purchase Price shall again be adjusted to be the Purchase Price which
would then be in effect if such record date had not been fixed.

          11.4     Current Per Share Market Value.
                   ------------------------------

          11.4.1   General.  For the purpose of any computation hereunder, the
                   -------
"current per share market price" of any security (a "Security" for the purpose
of this Section 11.4.1) on any date shall be deemed to be the average of the
daily closing prices per share of such Security for the thirty (30) consecutive
Trading Days (as such term is hereinafter defined) immediately prior to, but not
including, such date; provided, however, that in the event that the current per
share market price of the Security is determined during any period following the
announcement by the issuer of such Security of (i) a dividend or distribution on
such Security payable in shares of such Security or securities convertible into
such shares or (ii) any subdivision, combination or reclassification of such
Security, and prior to the expiration of thirty (30) Trading Days after the ex-
dividend date for such dividend or distribution, or the record date for such
subdivision, combination or reclassification, then, and in each such case, the
"current per share market price" shall be appropriately adjusted to reflect the
current market price per share equivalent of such Security.  The closing price
for each day shall be the last sale price, regular way, or, in case no such sale
takes place on such day, the average of the closing bid and asked prices,
regular way, in either case as reported in the principal consolidated
transaction reporting system with respect to securities listed or admitted to
trading on the New York Stock Exchange or, if the Security is not listed or
admitted to trading on the New York Stock Exchange, as reported in the principal
consolidated transaction reporting system with respect to securities listed on
the principal national securities exchange on which the Security is listed or
admitted to trading or, if the Security is not listed or admitted to trading on
any national securities exchange, the last quoted price or, if not so quoted,
the average of the high bid and low asked prices in the over-the-counter market,
as reported by Nasdaq or such other system then in use, or, if on any such date
the Security is not quoted by any such organization, the average of the closing
bid and asked prices as furnished by a professional market maker making a market
in the Security selected by the Board of Directors of the Company. The term
"Trading Day" shall mean a day on which the principal national securities
exchange on which the Security is listed or admitted to trading is open for the
transaction of business or, if the Security is not listed or admitted to trading
on any national securities exchange, a Business Day.  If the Security is not
publicly held or not so listed or traded, or if on any such date the Security is
not so quoted and no such market maker is making a market in the Security,
"current per share market price" shall mean the fair value per share as
determined in good faith by the Board of Directors of the Company or, if at the
time of such determination there is an Acquiring Person, by a nationally
recognized investment banking firm selected by the Board of Directors, which
shall have the duty to make such determination in

                                       17
<PAGE>

a reasonable and objective manner, whose determination shall be described in a
reasonably detailed statement filed with the Rights Agent and shall be
conclusive for all purposes.

          11.4.2    Preferred Shares.  Notwithstanding Section 11.4.1, for the
                    ----------------
purpose of any computation hereunder, the "current per share market price" of
the Preferred Shares shall be determined in the same manner as set forth above
in Section 11.4.1 (other than the last sentence thereof).  If the current per
share market price of the Preferred Shares cannot be determined in the manner
described in Section 11.4.1, the "current per share market price" of the
Preferred Shares shall be conclusively deemed to be an amount equal to 100 (as
such number may be appropriately adjusted for such events as stock splits, stock
dividends and recapitalizations with respect to the Common Shares occurring
after the date of this Agreement) multiplied by the current per share market
price of the Common Shares (as determined pursuant to Section 11.4.1). If
neither the Common Shares nor the Preferred Shares are publicly held or so
listed or traded, or if on any such date neither the Common Shares nor the
Preferred Shares are so quoted and no such market maker is making a market in
either the Common Shares or the Preferred Shares, "current per share market
price" of the Preferred Shares shall mean the fair value per share as determined
in good faith by the Board of Directors of the Company, or, if at the time of
such determination there is an Acquiring Person, by a nationally recognized
investment banking firm selected by the Board of Directors of the Company, which
shall have the duty to make such determination in a reasonable and objective
manner, which determination shall be described in a reasonably detailed
statement filed with the Rights Agent and shall be conclusive for all purposes.
For purposes of this Agreement, the "current per share market price" of one one-
hundredth of a Preferred Share shall be equal to the "current per share market
price" of one Preferred Share divided by 100.

          11.5      Insignificant Changes.  No adjustment in the Purchase Price
                    ---------------------
shall be required unless such adjustment would require an increase or decrease
of at least 1% in the Purchase Price.  Any adjustments which by reason of this
Section 11.5 are not required to be made shall be carried forward and taken into
account in any subsequent adjustment.  All calculations under this Section 11
shall be made to the nearest cent or to the nearest one-hundred thousandth of a
Preferred Share or the nearest one-hundredth of a Common Share or other share or
security, as the case may be.

          11.6      Shares Other Than Preferred Shares.  If as a result of an
                    ----------------------------------
adjustment made pursuant to Section 11.1, the holder of any Right thereafter
exercised shall become entitled to receive any shares of capital stock of the
Company other than Preferred Shares, thereafter the number of such other shares
so receivable upon exercise of any Right shall be subject to adjustment from
time to time in a manner and on terms as nearly equivalent as practicable to the
provisions with respect to the Preferred Shares contained in Sections 11.1,
11.2, 11.3, 11.5, 11.8, 11.9 and 11.13, and the provisions of Sections 7, 9, 10,
13 and 14 with respect to the Preferred Shares shall apply on like terms to any
such other shares.

          11.7      Rights Issued Prior to Adjustment.  All Rights originally
                    ---------------------------------
issued by the Company subsequent to any adjustment made to the Purchase Price
hereunder shall evidence the right to purchase, at the adjusted Purchase Price,
the number of one one-hundredths of a

                                       18
<PAGE>

Preferred Share purchasable from time to time hereunder upon exercise of the
Rights, all subject to further adjustment as provided herein.

          11.8      Effect of Adjustments.  Unless the Company shall have
                    ---------------------
exercised its election as provided in Section 11.9, upon each adjustment of the
Purchase Price as a result of the calculations made in Sections 11.2 and 11.3,
each Right outstanding immediately prior to the making of such adjustment shall
thereafter evidence the right to purchase, at the adjusted Purchase Price, that
number of one one-hundredths of a Preferred Share (calculated to the nearest
one-hundred thousandth of a Preferred Share) obtained by (i) multiplying (x) the
number of one one-hundredths of a Preferred Share covered by a Right immediately
prior to this adjustment by (y) the Purchase Price in effect immediately prior
to such adjustment of the Purchase Price and (ii) dividing the product so
obtained by the Purchase Price in effect immediately after such adjustment of
the Purchase Price.

          11.9      Adjustment in Number of Rights.  The Company may elect on or
                    ------------------------------
after the date of any adjustment of the Purchase Price to adjust the number of
Rights, in substitution for any adjustment in the number of one one-hundredths
of a Preferred Share issuable upon the exercise of a Right.  Each of the Rights
outstanding after such adjustment of the number of Rights shall be exercisable
for the number of one one-hundredths of a Preferred Share for which a Right was
exercisable immediately prior to such adjustment.  Each Right held of record
prior to such adjustment of the number of Rights shall become that number of
Rights (calculated to the nearest one-hundredth) obtained by dividing the
Purchase Price in effect immediately prior to adjustment of the Purchase Price
by the Purchase Price in effect immediately after adjustment of the Purchase
Price.  The Company shall promptly notify the Rights Agent in writing thereof
and shall make a public announcement of its election to adjust the number of
Rights, indicating the record date for the adjustment, and, if known at the
time, the amount of the adjustment to be made.  This record date may be the date
on which the Purchase Price is adjusted or any day thereafter, but, if the Right
Certificates have been issued, shall be at least ten (10) days later than the
date of the public announcement.  If Right Certificates have been issued, upon
each adjustment of the number of Rights pursuant to this Section 11.9, the
Company may, as promptly as practicable, cause to be distributed to holders of
record of Right Certificates on such record date Right Certificates evidencing,
subject to Section 14, the additional Rights to which such holders shall be
entitled as a result of such adjustment, or, at the option of the Company, shall
cause to be distributed to such holders of record in substitution and
replacement for the Right Certificates held by such holders prior to the date of
adjustment, and upon surrender thereof, if required by the Company, new Right
Certificates evidencing all the Rights to which such holders shall be entitled
after such adjustment.  Right Certificates so to be distributed shall be issued,
executed and countersigned in the manner provided for herein (and may bear, at
the option of the Company, the adjusted Purchase Price) and shall be registered
in the names of the holders of record of Right Certificates on the record date
specified in the public announcement.

          11.10     Right Certificates Unchanged.  Irrespective of any
                    ----------------------------
adjustment or change in the Purchase Price or the number of one one-hundredths
of a Preferred Share issuable upon the exercise of the Rights, the Right
Certificates theretofore and thereafter issued may continue to

                                       19
<PAGE>

express the Purchase Price per share and the number of one one-hundredths of a
Preferred Share which were expressed in the initial Right Certificates issued
hereunder.

          11.11     Par Value Limitations.  Before taking any action that would
                    ---------------------
cause an adjustment reducing the Purchase Price below one one-hundredth of the
then par value, if any, of the Preferred Shares or other shares of capital stock
issuable upon exercise of the Rights, the Company shall take any corporate
action which may, in the opinion of its counsel, be necessary in order that the
Company may validly and legally issue fully paid and nonassessable Preferred
Shares or other such shares at such adjusted Purchase Price.

          11.12     Deferred Issuance.  In any case in which this Section 11
                    -----------------
shall require that an adjustment in the Purchase Price be made effective as of a
record date for a specified event, the Company may elect to defer (with prompt
written notice thereof to the Rights Agent) until the occurrence of such event
the issuance to the holder of any Right exercised after such record date of that
number of Preferred Shares and shares of other capital stock or securities of
the Company, if any, issuable upon such exercise over and above the Preferred
Shares and shares of other capital stock or other securities, assets or cash of
the Company, if any, issuable upon such exercise on the basis of the Purchase
Price in effect prior to such adjustment; provided, however, that the Company
shall deliver to such holder a due bill or other appropriate instrument
evidencing such holder's right to receive such additional shares upon the
occurrence of the event requiring such adjustment.

          11.13     Reduction in Purchase Price.  Anything in this Section 11 to
                    ---------------------------
the contrary notwithstanding, the Company shall be entitled to make such
reductions in the Purchase Price, in addition to those adjustments expressly
required by this Section 11, as and to the extent that it in its sole discretion
shall determine to be advisable in order that any consolidation or subdivision
of the Preferred Shares, issuance wholly for cash of any of the Preferred Shares
at less than the current market price, issuance wholly for cash of Preferred
Shares or securities which by their terms are convertible into or exchangeable
for Preferred Shares, dividends on Preferred Shares payable in Preferred Shares
or issuance of rights, options or warrants referred to hereinabove in this
Section 11, hereafter made by the Company to holders of its Preferred Shares
shall not be taxable to such stockholders.

          11.14     Company Not to Diminish Benefits of Rights.  The Company
                    ------------------------------------------
covenants and agrees that after the earlier of the Shares Acquisition Date or
Distribution Date it will not, except as permitted by Section 23, Section 26 or
Section 27, take (or permit any Subsidiary to take) any action if at the time
such action is taken it is reasonably foreseeable that such action will
substantially diminish or otherwise eliminate the benefits intended to be
afforded by the Rights.

          11.15     Adjustment of Rights Associated with Common Shares.
                    --------------------------------------------------
Notwithstanding anything contained in this Agreement to the contrary, in the
event that the Company shall at any time after the date hereof and prior to the
Distribution Date (i) declare or pay any dividend on the outstanding Common
Shares payable in Common Shares, (ii) effect a subdivision or consolidation of
the outstanding Common Shares (by reclassification or otherwise than by the

                                       20
<PAGE>

payment of dividends payable in Common Shares), or (iii) combine the outstanding
Common Shares into a greater or lesser number of Common Shares, then in any such
case, the number of Rights associated with each Common Share then outstanding,
or issued or delivered thereafter but prior to the Distribution Date or in
accordance with Section 22 shall be proportionately adjusted so that the number
of Rights thereafter associated with each Common Share following any such event
shall equal the result obtained by multiplying the number of Rights associated
with each Common Share immediately prior to such event by a fraction, the
numerator of which shall be the total number of Common Shares outstanding
immediately prior to the occurrence of the event and the denominator of which
shall be the total number of Common Shares outstanding immediately following the
occurrence of such event.  The adjustments provided for in this Section 11.15
shall be made successively whenever such a dividend is declared or paid or such
a subdivision, combination or consolidation is effected.

          12.       Certificate of Adjusted Purchase Price or Number of Shares.
                    ----------------------------------------------------------
Whenever an adjustment is made as provided in Sections 11 or 13, the Company
shall (a) promptly prepare a certificate setting forth such adjustment, and a
brief, reasonably detailed statement of the facts, methodology and computations
accounting for such adjustment, (b) promptly file with the Rights Agent and with
each transfer agent for the Common Shares or the Preferred Shares a copy of such
certificate and (c) mail a brief summary thereof to each holder of a Right
Certificate in accordance with Section 25.  The Rights Agent shall be fully
authorized and protected in relying on any such certificate and on any
adjustment therein contained and shall have no duty with respect to and shall
not be deemed to have knowledge of any such adjustment unless and until it shall
have received such certificate.

           13.      Consolidation, Merger or Sale or Transfer of Assets or
                    ------------------------------------------------------
Earning Power.
-------------

          13.1      Certain Transactions.  In the event that, from and after the
                    --------------------
first occurrence of a Trigger Event, directly or indirectly, (A) the Company
shall consolidate with, or merge with and into, any other Person and the Company
shall not be the continuing or surviving corporation, (B) any Person shall
consolidate with the Company, or merge with and into the Company and the Company
shall be the continuing or surviving corporation of such merger and, in
connection with such merger, all or part of the Common Shares shall be changed
into or exchanged for stock or other securities of the Company or any other
Person or cash or any other property, or (C) the Company shall sell, exchange,
mortgage or otherwise transfer (or one or more of its Subsidiaries shall sell,
exchange, mortgage or otherwise transfer), in one or more transactions, assets
or earning power aggregating 50% or more of the assets or earning power of the
Company and its Subsidiaries (taken as a whole) to any other Person or Persons
(other than the Company or one or more wholly-owned Subsidiaries of the Company
in one or more transactions each of which complies with Section 11.14), then,
and in each such case, proper provision shall be made so that (i) each holder of
a Right (other than Rights which have become null and void pursuant to Section
11.1.2) shall thereafter have the right to receive, upon the exercise thereof at
a price per Right equal to the then current Purchase Price multiplied by the
number of one one-hundredths of a Preferred Share for which a Right was
exercisable immediately prior to the first occurrence of a Trigger Event (as
subsequently adjusted pursuant to Sections 11.1.1, 11.2, 11.3, 11.8, 11.9

                                       21
<PAGE>

and 11.12), in accordance with the terms of this Agreement and in lieu of
Preferred Shares or Common Shares, such number of validly authorized and issued,
fully paid, non-assessable and freely tradable Common Shares of the Principal
Party (as such term is hereinafter defined) not subject to any liens,
encumbrances, rights of first refusal or other adverse claims, as shall be equal
to the result obtained by (x) multiplying the then current Purchase Price by the
number of one one-hundredths of a Preferred Share for which a Right was
exercisable immediately prior to the first occurrence of a Trigger Event (as
subsequently adjusted pursuant to Sections 11.1.1, 11.2, 11.3, 11.8, 11.9 and
11.12) and (y) dividing that product by 50% of the then current per share market
price of the Common Shares of such Principal Party (determined pursuant to
Section 11.4) on the date of consummation of such consolidation, merger, sale or
transfer; provided, that the price per Right so payable and the number of Common
Shares of such Principal Party so receivable upon exercise of a Right shall
thereafter be subject to further adjustment as appropriate in accordance with
Section 11.6 to reflect any events covered thereby occurring in respect of the
Common Shares of such Principal Party after the occurrence of such
consolidation, merger, sale or transfer; (ii) such Principal Party shall
thereafter be liable for, and shall assume, by virtue of such consolidation,
merger, sale or transfer, all the obligations and duties of the Company pursuant
to this Agreement; (iii) the term "Company" shall thereafter be deemed to refer
to such Principal Party; and (iv) such Principal Party shall take such steps
(including, but not limited to, the reservation of a sufficient number of its
Common Shares in accordance with Section 9) in connection with such consummation
as may be necessary to assure that the provisions hereof shall thereafter be
applicable, as nearly as reasonably may be, in relation to its Common Shares
thereafter deliverable upon the exercise of the Rights; provided that, upon the
subsequent occurrence of any consolidation, merger, sale or transfer of assets
or other extraordinary transaction in respect of such Principal Party, each
holder of a Right shall thereupon be entitled to receive, upon exercise of a
Right and payment of the Purchase Price as provided in this Section 13.1, such
cash, shares, rights, warrants and other property which such holder would have
been entitled to receive had such holder, at the time of such transaction, owned
the Common Shares of the Principal Party receivable upon the exercise of a Right
pursuant to this Section 13.1, and such Principal Party shall take such steps
(including, but not limited to, reservation of shares of stock) as may be
necessary to permit the subsequent exercise of the Rights in accordance with the
terms hereof for such cash, shares, rights, warrants and other property. The
Company shall not consummate any such consolidation, merger, sale or transfer
unless prior thereto the Company and such Principal Party shall have executed
and delivered to the Rights Agent a supplemental agreement confirming that the
requirements of this Section 13.1 and Section 13.2 shall promptly be performed
in accordance with their terms and that such consolidation, merger, sale or
transfer of assets shall not result in a default by the Principal Party under
this Agreement as the same shall have been assumed by the Principal Party
pursuant to this Section 13.1 and Section 13.2 and providing that, as soon as
practicable after executing such agreement pursuant to this Section 13, the
Principal Party, at its own expense, shall

          (1) prepare and file a registration statement under the Securities
Act, if necessary, with respect to the Rights and the securities purchasable
upon exercise of the Rights on an appropriate form, use its best efforts to
cause such registration statement to become effective as soon as practicable
after such filing and use its best efforts to cause such registration

                                       22
<PAGE>

statement to remain effective (with a prospectus at all times meeting the
requirements of the Securities Act) until the Expiration Date and similarly
comply with applicable state securities laws;

               (2) use its best efforts, if the Common Shares of the Principal
Party shall be listed or admitted to trading on the New York Stock Exchange or
on another national securities exchange, to list or admit to trading (or
continue the listing of) the Rights and the securities purchasable upon exercise
of the Rights on the New York Stock Exchange or such securities exchange, or, if
the Common Shares of the Principal Party shall not be listed or admitted to
trading on the New York Stock Exchange or a national securities exchange, to
cause the Rights and the securities receivable upon exercise of the Rights to be
authorized for quotation on Nasdaq or on such other system then in use;

               (3) deliver to holders of the Rights historical financial
statements for the Principal Party which comply in all respects with the
requirements for registration on Form 10 (or any successor form) under the
Exchange Act; and

               (4) obtain waivers of any rights of first refusal or preemptive
rights in respect of the Common Shares of the Principal Party subject to
purchase upon exercise of outstanding Rights.

          In case the Principal Party has provision in any of its authorized
securities or in its certificate of incorporation or by-laws or other instrument
governing its corporate affairs, which provision would have the effect of (i)
causing such Principal Party to issue (other than to holders of Rights pursuant
to this Section 13), in connection with, or as a consequence of, the
consummation of a transaction referred to in this Section 13, Common Shares or
common stock equivalents of such Principal Party at less than the then current
market price per share thereof (determined pursuant to Section 11.4) or
securities exercisable for, or convertible into, Common Shares or common stock
equivalents of such Principal Party at less than such then current market price
(other than to holders of Rights pursuant to this Section 13), or (ii) providing
for any special payment, taxes or similar provision in connection with the
issuance of the Common Shares of such Principal Party pursuant to the provision
of Section 13, then, in such event, the Company hereby agrees with each holder
of Rights that it shall not consummate any such transaction unless prior thereto
the Company and such Principal Party shall have executed and delivered to the
Rights Agent a supplemental agreement providing that the provision in question
of such Principal Party shall have been canceled, waived or amended, or that the
authorized securities shall be redeemed, so that the applicable provision will
have no effect in connection with, or as a consequence of, the consummation of
the proposed transaction.

          The Company covenants and agrees that it shall not, at any time after
the Trigger Event, enter into any transaction of the type described in clauses
(A) through (C) of this Section 13.1 if (i) at the time of or immediately after
such consolidation, merger, sale, transfer or other transaction there are any
rights, warrants or other instruments or securities outstanding or agreements in
effect which would substantially diminish or otherwise eliminate the benefits
intended to be afforded by the Rights, (ii) prior to, simultaneously with or
immediately after such

                                       23
<PAGE>

consolidation, merger, sale, transfer or other transaction, the stockholders of
the Person who constitutes, or would constitute, the Principal Party for
purposes of Section 13.2 shall have received a distribution of Rights previously
owned by such Person or any of its Affiliates or Associates or (iii) the form or
nature of organization of the Principal Party would preclude or limit the
exercisability of the Rights. The provisions of this Section 13 shall similarly
apply to successive transactions of the type described in clauses (A) through
(C) of this Section 13.1.

           13.2     Principal Party.  "Principal Party" shall mean:
                    ---------------

                    (i)  in the case of any transaction described in (A) or (B)
of the first sentence of Section 13.1: (i) the Person that is the issuer of the
securities into which the Common Shares are converted in such merger or
consolidation, or, if there is more than one such issuer, the issuer the Common
Shares of which have the greatest aggregate market value of shares outstanding,
or (ii) if no securities are so issued, (x) the Person that is the other party
to the merger, if such Person survives said merger, or, if there is more than
one such Person, the Person the Common Shares of which have the greatest
aggregate market value of shares outstanding or (y) if the Person that is the
other party to the merger does not survive the merger, the Person that does
survive the merger (including the Company if it survives) or (z) the Person
resulting from the consolidation; and

                    (ii) in the case of any transaction described in (C) of the
first sentence in Section 13.1, the Person that is the party receiving the
greatest portion of the assets or earning power transferred pursuant to such
transaction or transactions, or, if each Person that is a party to such
transaction or transactions receives the same portion of the assets or earning
power so transferred or if the Person receiving the greatest portion of the
assets or earning power cannot be determined, whichever of such Persons is the
issuer of Common Shares having the greatest aggregate market value of shares
outstanding; provided, however, that in any such case described in the foregoing
clause (i) or (ii) of this Section 13.2, if the Common Shares of such Person are
not at such time or have not been continuously over the preceding 12-month
period registered under Section 12 of the Exchange Act, then (1) if such Person
is a direct or indirect Subsidiary of another Person the Common Shares of which
are and have been so registered, the term "Principal Party" shall refer to such
other Person, or (2) if such Person is a Subsidiary, directly or indirectly, of
more than one Person, the Common Shares of all of which are and have been so
registered, the term "Principal Party" shall refer to whichever of such Persons
is the issuer of Common Shares having the greatest aggregate market value of
shares outstanding, or (3) if such Person is owned, directly or indirectly, by a
joint venture formed by two or more Persons that are not owned, directly or
indirectly, by the same Person, the rules set forth in clauses (1) and (2) above
shall apply to each of the owners having an interest in the venture as if the
Person owned by the joint venture was a Subsidiary of both or all of such joint
ventures, and the Principal Party in each such case shall bear the obligations
set forth in this Section 13 in the same ratio as its interest in such Person
bears to the total of such interests.

          13.3      Approved Acquisitions.  Notwithstanding anything contained
                    ---------------------
herein to the contrary, upon the consummation of any merger or other acquisition
transaction of the type described in clause (A), (B) or (C) of Section 13.1
involving the Company pursuant to a merger

                                       24
<PAGE>

or other acquisition agreement between the Company and any Person (or one or
more of such Person's Affiliates or Associates) which agreement has been
approved by the Board of Directors of the Company prior to any Person becoming
an Acquiring Person, this Agreement and the rights of holders of Rights
hereunder shall be terminated in accordance with Section 7.1.

          14.       Fractional Rights and Fractional Shares.
                    ---------------------------------------

          14.1      Cash in Lieu of Fractional Rights.  The Company shall not be
                    ---------------------------------
required to issue fractions of Rights or to distribute Right Certificates which
evidence fractional Rights (except prior to the Distribution Date in accordance
with Section 11.15).  In lieu of such fractional Rights, there shall be paid to
the registered holders of the Right Certificates with regard to which such
fractional Rights would otherwise be issuable an amount in cash equal to the
same fraction of the current market value of a whole Right.  For the purposes of
this Section 14.1, the current market value of a whole Right shall be the
closing price of the Rights for the Trading Day immediately prior to the date on
which such fractional Rights would have been otherwise issuable.  The closing
price for any day shall be the last sale price, regular way, or, in case no such
sale takes place on such day, the average of the closing bid and asked prices,
regular way, in either case as reported in the principal consolidated
transaction reporting system with respect to securities listed or admitted to
trading on the New York Stock Exchange or, if the Rights are not listed or
admitted to trading on the New York Stock Exchange, as reported in the principal
consolidated transaction reporting system with respect to securities listed on
the principal national securities exchange on which the Rights are listed or
admitted to trading or, if the Rights are not listed or admitted to trading on
any national securities exchange, the last quoted price or, if not so quoted,
the average of the high bid and low asked prices in the over-the-counter market,
as reported by Nasdaq or such other system then in use or, if on any such date
the Rights are not quoted by any such organization, the average of the closing
bid and asked prices as furnished by a professional market maker making a market
in the Rights selected by the Board of Directors of the Company.  If on any such
date no such market maker is making a market in the Rights, the current market
value of the Rights on such date shall be the fair value of the Rights as
determined in good faith by the Board of Directors of the Company, or, if at the
time of such determination there is an Acquiring Person, by a nationally
recognized investment banking firm selected by the Board of Directors of the
Company, which shall have the duty to make such determination in a reasonable
and objective manner, which determination shall be described in a reasonably
detailed statement filed with the Rights Agent and shall be conclusive for all
purposes.

          14.2      Cash in Lieu of Fractional Preferred Shares.  The Company
                    -------------------------------------------
shall not be required to issue fractions of Preferred Shares (other than
fractions which are integral multiples of one one-hundredth of a Preferred
Share) upon exercise or exchange of the Rights or to distribute certificates
which evidence fractional Preferred Shares (other than fractions which are
integral multiples of one one-hundredth of a Preferred Share).  Interests in
fractions of Preferred Shares in integral multiples of one one-hundredth of a
Preferred Share may, at the election of the Company, be evidenced by depositary
receipts, pursuant to an appropriate agreement between the Company and a
depositary selected by it; provided, that such agreement shall provide that the

                                       25
<PAGE>

holders of such depositary receipts shall have all the rights, privileges and
preferences to which they are entitled as beneficial owners of the Preferred
Shares represented by such depositary receipts.  In lieu of fractional Preferred
Shares that are not integral multiples of one one-hundredth of a Preferred
Share, the Company shall pay to the registered holders of Right Certificates at
the time such Rights are exercised or exchanged as herein provided an amount in
cash equal to the same fraction of the current per share market price of one
Preferred Share (as determined in accordance with Section 14.1) for the Trading
Day immediately prior to the date of such exercise or exchange.

          14.3      Cash in Lieu of Fractional Common Shares.  The Company shall
                    ----------------------------------------
not be required to issue fractions of Common Shares or to distribute
certificates which evidence fractional Common Shares upon the exercise or
exchange of Rights.  In lieu of such fractional Common Shares, the Company shall
pay to the registered holders of the Right Certificates with regard to which
such fractional Common Shares would otherwise be issuable an amount in cash
equal to the same fraction of the current market value of a whole Common Share
(as determined in accordance with Section 14.1) for the Trading Day immediately
prior to the date of such exercise or exchange.

          14.4      Waiver of Right to Receive Fractional Rights or Shares.  The
                    ------------------------------------------------------
holder of a Right by the acceptance of the Rights expressly waives his right to
receive any fractional Rights or any fractional shares upon exercise or exchange
of a Right, except as permitted by this Section 14.

          14.5      Obligations of Rights Agent.  The Rights Agent shall have no
                    ---------------------------
duty or obligation with respect to this Section 14 unless and until it has
received specific instructions (and sufficient cash, if required) from the
Company with respect to its duties and obligations under such Section.

          15.       Rights of Action.  All rights of action in respect of this
                    ----------------
Agreement, except the rights of action given to the Rights Agent under Section
18 hereof, are vested in the respective registered holders of the Right
Certificates (and, prior to the Distribution Date, the registered holders of the
Common Shares); and any registered holder of any Right Certificate (or, prior to
the Distribution Date, of the Common Shares), without the consent of the Rights
Agent or of the holder of any other Right Certificate (or, prior to the
Distribution Date, of the Common Shares), may, in his own behalf and for his own
benefit, enforce this Agreement, and may institute and maintain any suit, action
or proceeding against the Company to enforce this Agreement, or otherwise
enforce or act in respect of his right to exercise the Rights evidenced by such
Right Certificate in the manner provided in such Right Certificate and in this
Agreement. Without limiting the foregoing or any remedies available to the
holders of Rights, it is specifically acknowledged that the holders of Rights
would not have an adequate remedy at law for any breach of this Agreement and
shall be entitled to specific performance of the obligations under, and
injunctive relief against actual or threatened violations of, the obligations of
any Person (including, without limitation, the Company) subject to this
Agreement.

                                       26
<PAGE>

          16.       Agreement of Right Holders.  Every holder of a Right by
                    --------------------------
accepting the same consents and agrees with the Company and the Rights Agent and
with every other holder of a Right that:

                    (a) prior to the Distribution Date, the Rights will be
     transferable only in connection with the transfer of the Common Shares;

                    (b) as of and after the Distribution Date, the Right
     Certificates are transferable only on the registry books of the Rights
     Agent if surrendered at the office of the Rights Agent designated for such
     purpose, duly endorsed or accompanied by a proper instrument of transfer
     with all required certifications completed and such other and further
     documentation as the Rights Agent may require; and

                    (c) the Company and the Rights Agent may deem and treat the
     Person in whose name the Right Certificate (or, prior to the Distribution
     Date, the associated Common Shares certificate) is registered as the
     absolute owner thereof and of the Rights evidenced thereby (notwithstanding
     any notations of ownership or writing on the Right Certificates or the
     associated Common Shares certificate made by anyone other than the Company
     or the Rights Agent) for all purposes whatsoever, and neither the Company
     nor the Rights Agent shall be affected by any notice to the contrary.

                    (d) notwithstanding anything in this Agreement to the
     contrary, neither the Company nor the Rights Agent shall have any liability
     to any holder of a Right or other Person as a result of its inability to
     perform any of its obligations under this Agreement by reason of any
     preliminary or permanent injunction or other order, decree, judgment or
     ruling (whether interlocutory or final) issued by a court of competent
     jurisdiction or by a governmental, regulatory or administrative agency or
     commission, or any statute, rule, regulation or executive order promulgated
     or enacted by any governmental authority, prohibiting or otherwise
     restraining performance of such obligation; provided, however, that the
                                                 --------  -------
     Company must use reasonable commercial efforts to have any such order,
     decree, judgment or ruling lifted or otherwise overturned as soon as
     possible.

          17.       Right Certificate Holder Not Deemed a Stockholder.  No
                    -------------------------------------------------
holder, as such, of any Right Certificate shall be entitled to vote, receive
dividends or be deemed for any purpose the holder of the Preferred Shares or any
other securities of the Company which may at any time be issuable on the
exercise of the Rights represented thereby, nor shall anything contained herein
or in any Right Certificate be construed to confer upon the holder of any Right
Certificate, as such, any of the rights of a stockholder of the Company or any
right to vote for the election of directors or upon any matter submitted to
stockholders at any meeting thereof, or to give or withhold consent to any
corporate action, or to receive notice of meetings or other actions affecting
stockholders (except as provided in Section 24), or to receive dividends or
subscription

                                       27
<PAGE>

rights, or otherwise, until the Right or Rights evidenced by such Right
Certificate shall have been exercised in accordance with the provisions hereof.

          18.       Concerning the Rights Agent.  The Company agrees to pay to
                    ---------------------------
the Rights Agent reasonable compensation for all services rendered by it
hereunder in accordance with a fee schedule to be mutually agreed upon and, from
time to time, on demand of the Rights Agent, its reasonable expenses and counsel
fees and other disbursements incurred in the preparation, delivery, acceptance,
administration, execution and amendment of this Agreement and the exercise and
performance of its duties hereunder.  The Company also agrees to indemnify the
Rights Agent for, and to hold it harmless against, any loss, liability, damage,
judgment, ruling (interlocutory or final), fine, penalty, claim, demand,
settlement, cost or expense, incurred without gross negligence, bad faith or
willful misconduct (as finally determined by a court of competent jurisdiction)
on the part of the Rights Agent, for any action taken, suffered or omitted by
the Rights Agent in connection with the acceptance and administration of this
Agreement or the exercise or performance of its duties hereunder, including,
without limitation, the costs and expenses of defending against any claim of
liability arising therefrom, directly or indirectly.  The indemnity provided
herein shall survive the termination of this Agreement and the termination and
the expiration of the Rights.  The costs and expenses incurred in enforcing this
right of indemnification shall be paid by the Company.  Anything in this
Agreement to the contrary notwithstanding, in no event shall the Rights Agent be
liable for special, punitive, indirect, incidental or consequential loss or
damage of any kind whatsoever (including, but not limited to, lost profits),
even if the Rights Agent has been advised of the possibility of such loss or
damage. Any liability of the Rights Agent under this Agreement shall be limited
to five times the amount of fees paid by the Company to the Rights Agent.

          The Rights Agent shall be authorized to rely on, shall be protected
and shall incur no liability for or in respect of any action taken, suffered or
omitted by it in connection with the acceptance and administration of this
Agreement in reliance upon any Right Certificate or certificate for the
Preferred Shares or the Common Shares or for other securities of the Company,
instrument of assignment or transfer, power of attorney, endorsement, affidavit,
letter, notice, instruction, direction, consent, certificate, statement, or
other paper or document believed by it to be genuine and to be signed, executed
and, where necessary, verified or acknowledged, by the proper Person or Persons.
The Rights Agent shall not be deemed to have any duty or notice unless and until
the Company has provided the Rights Agent with actual written notice.

          19.       Merger or Consolidation or Change of Name of Rights Agent.
                    ---------------------------------------------------------
Any Person into which the Rights Agent or any successor Rights Agent may be
merged or with which it may be consolidated, or any Person resulting from any
merger or consolidation to which the Rights Agent or any successor Rights Agent
shall be a party, or any Person succeeding to the shareholder services business
of the Rights Agent or any successor Rights Agent, shall be the successor to the
Rights Agent under this Agreement without the execution or filing of any paper
or any further act on the part of any of the parties hereto, provided that such
Person would be eligible for appointment as a successor Rights Agent under the
provisions of Section 21.  In case at the time such successor Rights Agent shall
succeed to the agency created by this Agreement,

                                       28
<PAGE>

any of the Right Certificates shall have been countersigned but not delivered,
any such successor Rights Agent may adopt the countersignature of the
predecessor Rights Agent and deliver such Right Certificates so countersigned;
and in case at that time any of the Right Certificates shall not have been
countersigned, any successor Rights Agent may countersign such Right
Certificates either in the name of the predecessor Rights Agent or in the name
of the successor Rights Agent; and in all such cases such Right Certificates
shall have the full force provided in the Right Certificates and in this
Agreement.

          In case at any time the name of the Rights Agent shall be changed and
at such time any of the Right Certificates shall have been countersigned but not
delivered, the Rights Agent may adopt the countersignature under its prior name
and deliver Right Certificates so countersigned; and in case at that time any of
the Right Certificates shall not have been countersigned, the Rights Agent may
countersign such Right Certificates either in its prior name or in its changed
name; and in all such cases such Right Certificates shall have the full force
provided in the Right Certificates and in this Agreement.

          20.       Duties of Rights Agent.  The Rights Agent undertakes the
                    ----------------------
duties and obligations expressly imposed by this Agreement (and no implied
duties or obligations) upon the following terms and conditions, by all of which
the Company and the holders of Right Certificates, by their acceptance thereof,
shall be bound:

          20.1      Legal Counsel.  The Rights Agent may consult with legal
                    -------------
counsel selected by it (who may be legal counsel for the Company), and the
advice or opinion of such counsel shall be full and complete authorization and
protection to the Rights Agent, and the Rights Agent shall incur no liability
for or in respect of any action taken, suffered or omitted by it in good faith
and in accordance with such advice or opinion.

          20.2      Certificates as to Facts or Matters.  Whenever in the
                    -----------------------------------
performance of its duties under this Agreement the Rights Agent shall deem it
necessary or desirable that any fact or matter be proved or established by the
Company prior to taking, suffering or omitting to take any action hereunder,
such fact or matter (unless other evidence in respect thereof be herein
specifically prescribed) may be deemed to be conclusively proved and established
by a certificate signed by any one of the Chairman of the Board of Directors,
the Chief Executive Officer, the President, the Chief Financial Officer, any
Vice President, the Treasurer, the Secretary or any Assistant Treasurer or
Assistant Secretary of the Company and delivered to the Rights Agent; and such
certificate shall be full authorization and protection to the Rights Agent, and
the Rights Agent shall incur no liability for or in respect of any action taken,
suffered or omitted in good faith by it under the provisions of this Agreement
in reliance upon such certificate.

          20.3      Standard of Care.  The Rights Agent shall be liable
                    ----------------
hereunder only for its own gross negligence, bad faith or willful misconduct (as
finally determined by a court of competent jurisdiction).

          20.4      Reliance on Agreement and Right Certificates.  The Rights
                    --------------------------------------------
Agent shall not be liable for or by reason of any of the statements of fact or
recitals contained in this Agreement

                                       29
<PAGE>

or in the Right Certificates (except as to its countersignature thereof) or be
required to verify the same, but all such statements and recitals are and shall
be deemed to have been made by the Company only.

          20.5   No Responsibility as to Certain Matters.  The Rights Agent
                 ---------------------------------------
shall not have any liability for, nor be under any responsibility in respect of
the validity of this Agreement or the execution and delivery hereof (except the
due execution hereof by the Rights Agent) or in respect of the validity or
execution of any Right Certificate (except its countersignature thereof); nor
shall it have any liability for, nor be responsible for any breach by the
Company of any covenant or condition contained in this Agreement or in any Right
Certificate; nor shall it have any liability for, nor be responsible for any
change in the exercisability of the Rights (including the Rights becoming null
and void pursuant to Section 11.1.2) or any adjustment required under the
provisions of Sections 3, 11, 13, 23 or 27 or responsible for the manner, method
or amount of any such adjustment or the ascertaining of the existence of facts
that would require any such adjustment (except with respect to the exercise of
Rights evidenced by Right Certificates after actual notice of any such change or
adjustment); nor shall it by any act hereunder be deemed to make any
representation or warranty as to the authorization or reservation of any
Preferred Shares or other securities to be issued pursuant to this Agreement or
any Right Certificate or as to whether any Preferred Shares will, when so
issued, be validly authorized and issued, fully paid and nonassessable.

          20.6   Further Assurance by Company.  The Company agrees that it will
                 ----------------------------
perform, execute, acknowledge and deliver or cause to be performed, executed,
acknowledged and delivered all such further and other acts, instruments and
assurances as may reasonably be required by the Rights Agent for the carrying
out or performing by the Rights Agent of the provisions of this Agreement.

          20.7   Authorized Company Officers.  The Rights Agent is hereby
                 ---------------------------
authorized and directed to accept advice or instructions with respect to the
performance of its duties hereunder from any one of the Chairman of the Board of
Directors, the Chief Executive Officer, the President, the Chief Financial
Officer, any Vice President, the Treasurer, the Secretary or any Assistant
Treasurer or Assistant Secretary of the Company, and to apply to such officers
for advice or instructions in connection with its duties under this Agreement,
and such advice or instructions shall be full authorization and protection to
the Rights Agent and the Rights Agent shall incur no liability for or in respect
of any action taken, suffered or omitted to be taken by it in good faith in
accordance with the advice or instructions of any such officer or for any delay
in acting while waiting for the advice or instructions.  Any application by the
Rights Agent for written advice or instructions from the Company may, at the
option of the Rights Agent, set forth in writing any action proposed to be
taken, suffered or omitted by the Rights Agent with respect to its duties or
obligations under this Agreement and the date on and/or after which such action
shall be taken or suffered or such omission shall be effective.  The Rights
Agent shall not be liable to the Company for any action taken or suffered by, or
omission of, the Rights Agent in accordance with a proposal included in any such
application on or after the date specified therein (which date shall not be less
than three business days after the date any such officer actually

                                       30
<PAGE>

receives such application, unless any such officer shall have consented in
writing to an earlier date) unless, prior to taking or suffering any such advice
or action (or the effective date in the case of omission), the Rights Agent
shall have received written instructions in response to such application
specifying the action to be taken, suffered or omitted. The Rights Agent may
conclusively rely in good faith on the most recent advice or instructions given
by any such officer.

          20.8   Freedom to Trade in Company Securities.  The Rights Agent and
                 --------------------------------------
any stockholder, affiliate, director, officer or employee of the Rights Agent
may buy, sell or deal in any of the Rights or other securities of the Company or
become pecuniarily interested in any transaction in which the Company may be
interested, or contract with or lend money to the Company or otherwise act as
fully and freely as though it were not Rights Agent under this Agreement.
Nothing herein shall preclude the Rights Agent from acting in any other capacity
for the Company or for any other Person.

          20.9   Reliance on Attorneys and Agents.  The Rights Agent may execute
                 --------------------------------
and exercise any of the rights or powers hereby vested in it or perform any duty
hereunder either itself or by or through its attorneys or agents, and the Rights
Agent shall not be answerable or accountable for any act, omission, default,
neglect or misconduct of any such attorneys or agents or for any loss to the
Company or any other Person resulting from any such act, omission, default,
neglect or misconduct, absent gross negligence, bad faith or willful misconduct
(as finally determined by a court of competent jurisdiction) in the selection
and continued employment thereof.

          20.10  Incomplete Certificate.  If, with respect to any Rights
                 ----------------------
Certificate surrendered to the Rights Agent for exercise or transfer, the
certificate contained in the form of assignment or the form of election to
purchase set forth on the reverse thereof, as the case may be, has not been
properly completed to certify the holder is not an Acquiring Person (or an
Affiliate or Associate thereof), the Rights Agent shall not take any further
action with respect to such requested exercise or transfer without first
consulting with the Company, provided however, that the Rights Agent shall be
protected and shall incur no liability for, or in respect of any action taken,
suffered or omitted in connection with any such Rights Certificate surrendered
to the Rights Agent for exercise or transfer.  The Company agrees to give the
Rights Agent prompt written notice of any event or ownership that comes to the
Company's attention that would prohibit the exercise or transfer of the Rights
Certificates.

          20.11  Rights Holders List.  At any time and from time to time after
                 -------------------
the Distribution Date, upon the request of the Company, the Rights Agent shall
promptly deliver to the Company a list, as of the most recent practicable date
(or as of such earlier date as may be specified by the Company), of the holders
of record of Rights.

          20.12  Risk of Funds.  No provision of this Agreement shall require
                 -------------
the Rights Agent to expend or risk its own funds or otherwise incur any
financial liability in the performance of any of its duties hereunder or in the
exercise of its rights if it believes that

                                       31
<PAGE>

repayment of such funds or adequate indemnification against such risk or
liability is not assured it.

          21.    Change of Rights Agent.  The Rights Agent or any successor
                 ----------------------
Rights Agent may resign and be discharged from its duties under this Agreement
upon thirty (30) days' notice in writing mailed to the Company and to each
transfer agent of the Common Shares and/or Preferred Shares, as applicable, by
registered or certified mail.  Following the Distribution Date, the Company
shall promptly notify the holders of the Right Certificates by first-class mail
of any such resignation.  The Company may remove the Rights Agent or any
successor Rights Agent upon thirty (30) days' notice in writing, mailed to the
Rights Agent or successor Rights Agent, as the case may be, and to each transfer
agent of the Common Shares and/or Preferred Shares, as applicable, by registered
or certified mail, and to the holders of the Right Certificates by first-class
mail.  If the Rights Agent shall resign or be removed or shall otherwise become
incapable of acting, the resigning, removed, or incapacitated Rights Agent shall
remit to the Company, or to any successor Rights Agent designated by the
Company, all books, records, funds, certificates or other documents or
instruments of any kind then in its possession which were acquired by such
resigning, removed or incapacitated Rights Agent in connection with its services
as Rights Agent hereunder, and shall thereafter be discharged from all duties
and obligations hereunder.  Following notice of such removal, resignation or
incapacity, the Company shall appoint a successor to such Rights Agent.  If the
Company shall fail to make such appointment within a period of thirty (30) days
after giving notice of such removal or after it has been notified in writing of
such resignation or incapacity by the resigning or incapacitated Rights Agent or
by the holder of a Right Certificate (who shall, with such notice, submit his
Right Certificate for inspection by the Company), then the registered holder of
any Right Certificate may apply to any court of competent jurisdiction for the
appointment of a new Rights Agent. Any successor Rights Agent, whether appointed
by the Company or by such a court, shall be (i) a Person organized and doing
business under the laws of the United States or of the State of New York or the
State of California (or any other state of the United States so long as such
Person is authorized to do business as a banking institution in the State of New
York or California) in good standing, having an office in the State of New York
or the State of California, which is authorized under such laws to conduct
shareholder services business and is subject to supervision or examination by
Federal or state authority and which has at the time of its appointment as
Rights Agent a combined capital and surplus of at least $50 million or (ii) an
Affiliate of such Person described in clause (i) of this sentence.  After
appointment, the successor Rights Agent shall be vested with the same powers,
rights, duties and responsibilities as if it had been originally named as Rights
Agent without further act or deed; but the predecessor Rights Agent shall
deliver and transfer to the successor Rights Agent any property at the time held
by it hereunder, and execute and deliver any further assurance, conveyance, act
or deed necessary for the purpose.  Not later than the effective date of any
such appointment, the Company shall file notice thereof in writing with the
predecessor Rights Agent and each transfer agent of the Common Shares and/or
Preferred Shares, as applicable, and, following the Distribution Date, mail a
notice thereof in writing to the registered holders of the Right Certificates.
Failure to give any notice provided for in this Section 21, however, or any
defect therein, shall not affect the

                                       32
<PAGE>

legality or validity of the resignation or removal of the Rights Agent or the
appointment of the successor Rights Agent, as the case may be.

          22.    Issuance of New Right Certificates.  Notwithstanding any of
                 ----------------------------------
the provisions of this Agreement or of the Rights to the contrary, the Company
may, at its option, issue new Right Certificates evidencing Rights in such form
as may be approved by its Board of Directors to reflect any adjustment or change
in the Purchase Price and the number or kind or class of shares or other
securities or property purchasable under the Right Certificates made in
accordance with the provisions of this Agreement.  In addition, in connection
with the issuance or sale of Common Shares following the Distribution Date and
prior to the Expiration Date, the Company shall, with respect to Common Shares
so issued or sold pursuant to the exercise of stock options or under any
employee plan or arrangement, granted or awarded, or upon exercise, conversion
or exchange of securities hereinafter issued by the Company, in each case
existing prior to the Distribution Date, issue Right Certificates representing
the appropriate number of Rights in connection with such issuance or sale;
provided, however, that (i) no such Right Certificate shall be issued if, and to
the extent that, the Company shall be advised by counsel that such issuance
would create a significant risk of material adverse tax consequences to the
Company or the Person to whom such Right Certificate would be issued and (ii) no
such Right Certificate shall be issued if, and to the extent that, appropriate
adjustment shall otherwise have been made in lieu of the issuance thereof.

           23.   Redemption.
                 ----------

          23.1   Right to Redeem.  The Board of Directors of the Company may, at
                 ---------------
its option, at any time prior to a Trigger Event, redeem all but not less than
all of the then outstanding Rights at a redemption price of $.01 per Right,
appropriately adjusted to reflect any stock split, stock dividend,
recapitalization or similar transaction occurring after the date hereof (such
redemption price being hereinafter referred to as the "Redemption Price"), and
the Company may, at its option, pay the Redemption Price in Common Shares (based
on the "current per share market price," determined pursuant to Section 11.4, of
the Common Shares at the time of redemption), cash or any other form of
consideration deemed appropriate by the Board of Directors. The redemption of
the Rights by the Board of Directors may be made effective at such time, on such
basis and subject to such conditions as the Board of Directors in its sole
discretion may establish.

          23.2   Redemption Procedures.  Immediately upon the action of the
                 ---------------------
Board of Directors of the Company ordering the redemption of the Rights (or at
such later time as the Board of Directors may establish for the effectiveness of
such redemption), and without any further action and without any notice, the
right to exercise the Rights will terminate and the only right thereafter of the
holders of Rights shall be to receive the Redemption Price for each Right so
held.  The Company shall promptly give the Rights Agent written notice of such
redemption of the Rights and shall promptly give public notice of such
redemption; provided, however, that the failure to give, or any defect in, any
such notice shall not affect the validity of such redemption.  The Company shall
promptly give, or cause the Rights Agent to give, notice of such redemption to
the holders of the then outstanding Rights by mailing such notice to all such

                                       33
<PAGE>

holders at their last addresses as they appear upon the registry books of the
Rights Agent or, prior to the Distribution Date, on the registry books of the
transfer agent for the Common Shares.  Any notice which is mailed in the manner
herein provided shall be deemed given, whether or not the holder receives the
notice.  Each such notice of redemption shall state the method by which the
payment of the Redemption Price will be made.  Neither the Company nor any of
its Affiliates or Associates may redeem, acquire or purchase for value any
Rights at any time in any manner other than that specifically set forth in this
Section 23 or in Section 27, and other than in connection with the purchase,
acquisition or redemption of Common Shares prior to the Distribution Date.

          24.    Notice of Certain Events.  In case the Company shall propose at
                 ------------------------
any time after the earlier of the Shares Acquisition Date and the Distribution
Date (a) to pay any dividend payable in stock of any class to the holders of
Preferred Shares or to make any other distribution to the holders of Preferred
Shares (other than a regular periodic cash dividend at a rate not in excess of
125% of the rate of the last regular periodic cash dividend theretofore paid or,
in case regular periodic cash dividends have not theretofore been paid, at a
rate not in excess of 50% of the average net income per share of the Company for
the four quarters ended immediately prior to the payment of such dividends, or a
stock dividend on, or a subdivision, combination or reclassification of the
Common Shares), or (b) to offer to the holders of Preferred Shares rights or
warrants to subscribe for or to purchase any additional Preferred Shares or
shares of stock of any class or any other securities, rights or options, or (c)
to effect any reclassification of its Preferred Shares (other than a
reclassification involving only the subdivision of outstanding Preferred
Shares), or (d) to effect any consolidation or merger into or with, or to effect
any sale or other transfer (or to permit one or more of its Subsidiaries to
effect any sale or other transfer), in one or more transactions, of 50% or more
of the assets or earning power of the Company and its Subsidiaries (taken as a
whole) to, any other Person (other than pursuant to a merger or other
acquisition agreement of the type described in Section 1.3(ii)(A)(z)), or (e) to
effect the liquidation, dissolution or winding up of the Company, or (f) to
declare or pay any dividend on the Common Shares payable in Common Shares or to
effect a subdivision, combination or consolidation of the Common Shares (by
reclassification or otherwise than by payment of dividends in Common Shares),
then, in each such case, the Company shall give to the Rights Agent and to each
holder of a Right Certificate, in accordance with Section 25, a notice of such
proposed action, which shall specify the record date for the purposes of such
stock dividend, distribution of rights or warrants, or the date on which such
reclassification, consolidation, merger, sale, transfer, liquidation,
dissolution, or winding up is to take place and the date of participation
therein by the holders of the Preferred Shares and/or Common Shares, if any such
date is to be fixed, and such notice shall be so given in the case of any action
covered by clause (a) or (b) above at least ten (10) days prior to the record
date for determining holders of the Preferred Shares for purposes of such
action, and in the case of any such other action, at least ten (10) days prior
to the date of the taking of such proposed action or the date of participation
therein by the holders of the Preferred Shares and/or Common Shares, whichever
shall be the earlier.

                                       34
<PAGE>

          In case any event set forth in Section 11.1.2 or Section 13 shall
occur, then, in any such case, (i) the Company shall as soon as practicable
thereafter give to the Rights Agent and to each holder of a Right Certificate,
in accordance with Section 25, a notice of the occurrence of such event, which
notice shall describe the event and the consequences of the event to holders of
Rights under Section 11.1.2 and Section 13, and (ii) all references in this
Section 24 to Preferred Shares shall be deemed thereafter to refer to Common
Shares and/or, if appropriate, other securities.

          Notwithstanding anything in this Agreement to the contrary, prior to
the Distribution Date a filing by the Company with the Securities and Exchange
Commission shall constitute sufficient notice to the holders of securities of
the Company, including the Rights, for purposes of this Agreement and no other
notice need be given.

          25.    Notices.  Notices or demands authorized by this Agreement to be
                 -------
given or made by the Rights Agent or by the holder of any Right Certificate to
or on the Company shall be sufficiently given or made if sent by first-class
mail, postage prepaid, addressed (until another address is filed in writing with
the Rights Agent) as follows:

                 Varco International, Inc.
                 2835 Holmes Road
                 Houston, Texas 77051
                 Attention: Secretary

Subject to the provisions of Section 21 and Section 24, any notice or demand
authorized by this Agreement to be given or made by the Company or by the holder
of any Right Certificate to or on the Rights Agent shall be sufficiently given
or made if sent by first-class mail, postage prepaid, addressed (until another
address is filed in writing with the Company) as follows:

                 ChaseMellon Shareholder Services, L.L.C.
                 2323 Bryan Street, Suite 2300
                 Dallas, TX 75201
                 Attention: Relationship Manager

                 with a copy to:

                 ChaseMellon Shareholder Services, L.L.C.
                 85 Challenger Road
                 Ridgefield Park, NJ 07660
                 Attention: General Counsel

Notices or demands authorized by this Agreement to be given or made by the
Company or the Rights Agent to the holder of any Right Certificate (or, prior to
the Distribution Date, to the holder of any certificate representing Common
Shares) shall be sufficiently given or made if sent

                                       35
<PAGE>

by first-class mail, postage prepaid, addressed to such holder at the address of
such holder as shown on the registry books of the Company.

          26.    Supplements and Amendments.  Except as otherwise provided in
                 --------------------------
this Section 26, for so long as the Rights are then redeemable and subject to
the penultimate sentence of this Section 26, the Company may in its sole and
absolute discretion, and the Rights Agent shall, if the Company so directs,
supplement or amend any provision of this Agreement in any respect without the
approval of any holders of Rights or Common Shares.  From and after the time
that the Rights are no longer redeemable and subject to the penultimate sentence
of this Section 26, the Company may, and the Rights Agent shall, if the Company
so directs, from time to time supplement or amend this Agreement without the
approval of any holders of Rights (i) to cure any ambiguity or to correct or
supplement any provision contained herein which may be defective or inconsistent
with any other provisions herein or (ii) to make any other changes or provisions
in regard to matters or questions arising hereunder which the Company may deem
necessary or desirable, including but not limited to extending the Final
Expiration Date; provided, however, that no such supplement or amendment shall
adversely affect the interests of the holders of Rights as such (other than an
Acquiring Person or an Affiliate or Associate of an Acquiring Person), and no
such supplement or amendment may cause the Rights again to become redeemable or
cause this Agreement again to become amendable other than in accordance with
this sentence; provided further, that the right of the Board of Directors to
extend the Distribution Date shall not require any amendment or supplement
hereunder. Notwithstanding anything to the contrary herein, no amendment or
modification shall be made (i) to the definition of "Existing Holder" or (ii) to
the exception of Existing Holders from the definition of "Acquiring Person" or
the substantive equivalent thereof, unless such amendment or modification is
unanimously approved by the Board of Directors.  Upon the delivery of a
certificate from an appropriate officer of the Company which states that the
proposed supplement or amendment is in compliance with the terms of this Section
26, and, provided such supplement or amendment does not change or increase the
Rights Agent's duties, liabilities or obligations hereunder, the Rights Agent
shall execute such supplement or amendment.  Without limiting the foregoing, at
any time prior to such time as any Person becomes an Acquiring Person, the
Company and the Rights Agent may amend this Agreement to lower the thresholds
set forth in Sections 1.1 and 3.1 to not less than the greater of (i) any
percentage greater than the largest percentage of the outstanding Common Shares
then known by the Company to be beneficially owned by any Person (other than an
Exempt Person or Existing Holder) and (ii) 10%.

           27.   Exchange.
                 --------

          27.1   Exchange of Common Shares for Rights.  The Board of Directors
                 ------------------------------------
of the Company may, at its option, at any time after the occurrence of a Trigger
Event, exchange Common Shares for all or part of the then outstanding and
exercisable Rights (which shall not include Rights that have become null and
void pursuant to the provisions of Section 11.1.2) by exchanging at an exchange
ratio of one Common Share per Right, appropriately adjusted to reflect any stock
split, stock dividend or similar transaction occurring after the date hereof
(such amount per Right being hereinafter referred to as the "Exchange
Consideration").

                                       36
<PAGE>

Notwithstanding the foregoing, the Board of Directors shall not be empowered to
effect such exchange at any time after any Acquiring Person shall have become
the Beneficial Owner of 50% or more of the Common Shares then outstanding. From
and after the occurrence of an event specified in Section 13.1, any Rights that
theretofore have not been exchanged pursuant to this Section 27.1 shall
thereafter be exercisable only in accordance with Section 13 and may not be
exchanged pursuant to this Section 27.1. The exchange of the Rights by the Board
of Directors may be made effective at such time, on such basis and with such
conditions as the Board of Directors in its sole discretion may establish.

          27.2   Exchange Procedures.  Immediately upon the action of the
                 -------------------
Board of Directors of the Company ordering the exchange for any Rights pursuant
to Section 27.1 and without any further action and without any notice, the right
to exercise such Rights shall terminate and the only right thereafter of a
holder of such Rights shall be to receive the Exchange Consideration.  The
Company shall promptly give the Rights Agent written notice of any such exchange
and shall promptly give public notice of any such exchange; provided, however,
that the failure to give, or any defect in, such notice shall not affect the
validity of such exchange. The Company promptly shall mail a notice of any such
exchange to all of the holders of such Rights at their last addresses as they
appear upon the registry books of the Rights Agent.  Any notice which is mailed
in the manner herein provided shall be deemed given, whether or not the holder
receives the notice.  Each such notice of exchange shall state the method by
which the exchange of the Common Shares for Rights will be effected and, in the
event of any partial exchange, the number of Rights which will be exchanged.
Any partial exchange shall be effected pro rata based on the number of Rights
(other than the Rights that have become null and void pursuant to the provisions
of Section 11.1.2) held by each holder of Rights.

          27.3   Insufficient Shares.  The Company may at its option
                 -------------------
substitute, and, in the event that there shall not be sufficient Common Shares
issued but not outstanding or authorized but unissued to permit an exchange of
Rights for Common Shares as contemplated in accordance with this Section 27, the
Company shall substitute to the extent of such insufficiency, for each Common
Share that would otherwise be issuable upon exchange of a Right, a number of
Preferred Shares or fraction thereof (or equivalent preferred stock, as such
term is defined in Section 11.2) such that the current per share market price
(determined pursuant to Section 11.4) of one Preferred Share (or equivalent
preferred share) multiplied by such number or fraction is equal to the current
per share market price of one Common Share (determined pursuant to Section 11.4)
as of the date of such exchange.

          28.    Successors.  All the covenants and provisions of this
                 ----------
Agreement by or for the benefit of the Company or the Rights Agent shall bind
and inure to the benefit of their respective successors and assigns hereunder.

          29.    Benefits of this Agreement.  Nothing in this Agreement shall be
                 --------------------------
construed to give to any Person other than the Company, the Rights Agent and the
registered holders of the Right Certificates (and, prior to the Distribution
Date, the Common Shares) any legal or equitable right, remedy or claim under
this Agreement; but this Agreement shall be for the sole

                                       37
<PAGE>

and exclusive benefit of the Company, the Rights Agent and the registered
holders of the Right Certificates (and, prior to the Distribution Date, the
Common Shares).

          30.    Determination and Actions by the Board of Directors.  The
                 ---------------------------------------------------
Board of Directors of the Company shall have the exclusive power and authority
to administer this Agreement and to exercise the rights and powers specifically
granted to the Board of Directors of the Company or to the Company, or as may be
necessary or advisable in the administration of this Agreement, including,
without limitation, the right and power to (i) interpret the provisions of this
Agreement and (ii) make all determinations deemed necessary or advisable for the
administration of this Agreement (including, without limitation, a determination
to redeem or not redeem the Rights or amend this Agreement).  All such actions,
calculations, interpretations and determinations (including, for purposes of
clause (y) below, all omissions with respect to the foregoing) that are done or
made by the Board of Directors of the Company in good faith shall (x) be final,
conclusive and binding on the Company, the Rights Agent, the holders of the
Rights, as such, and all other Persons, and (y) not subject the Board of
Directors to any liability to the holders of the Rights.  The Rights Agent shall
always be entitled to assume that the Company's Board of Directors acted in good
faith and shall be fully protected and incur no liability in reliance thereon.

          31.    Severability.  If any term, provision, covenant or restriction
                 ------------
of this Agreement is held by a court of competent jurisdiction or other
authority to be invalid, void or unenforceable, the remainder of the terms,
provisions, covenants and restrictions of this Agreement shall remain in full
force and effect and shall in no way be affected, impaired or invalidated.

          32.    Governing Law.  This Agreement and each Right Certificate
                 -------------
issued hereunder shall be deemed to be a contract made under the laws of the
State of New York and for all purposes shall be governed by and construed in
accordance with the laws of such State applicable to contracts to be made and
performed entirely within such State.

          33.    Counterparts.  This Agreement may be executed in any number of
                 ------------
counterparts and each of such counterparts shall for all purposes be deemed to
be an original, and all such counterparts shall together constitute but one and
the same instrument.

          34.    Descriptive Heading.  Descriptive headings of the several
                 -------------------
Sections of this Agreement are inserted for convenience only and shall not
control or affect the meaning or construction of any of the provisions hereof.

                                       38
<PAGE>

          IN WITNESS WHEREOF, the parties hereto have caused this Agreement to
be duly executed, as of the day and year first above written.

                                   VARCO INTERNATIONAL, INC.

                                   By    /s/ JOSEPH C. WINKLER
                                      -------------------------------------
                                      Joseph C. Winkler
                                      Executive Vice President, Chief
                                      Financial Officer and Treasurer

                                   CHASEMELLON SHAREHOLDER SERVICES, L.L.C.

                                   By    /s/ CINDY BENNETT
                                      -------------------------------------
                                      Name:  Cindy Bennett
                                      Title: Relationship Manager

                                      39
<PAGE>

                                                                       EXHIBIT A
                                                                       ---------

                                    FORM OF

                          CERTIFICATE OF DESIGNATIONS

                                      of

                 SERIES A JUNIOR PARTICIPATING PREFERRED STOCK

                                      of

                           VARCO INTERNATIONAL, INC.

                        (Pursuant to Section 151 of the
                       Delaware General Corporation Law)

                         _____________________________

          Varco International, Inc., a corporation organized and existing under
the General Corporation Law of the State of Delaware (hereinafter called the
"Corporation"), hereby certifies that the following resolution was adopted by
the Board of Directors of the Corporation as required by Section 151 of the
General Corporation Law at a meeting duly called and held on November 9, 2000.

          RESOLVED, that pursuant to the authority granted to and vested in the
Board of Directors of this Corporation (hereinafter called the "Board of
Directors" or the "Board") in accordance with the provisions of the Certificate
of Incorporation of this Corporation, the Board of Directors hereby creates a
series of Preferred Stock, par value $.01 per share (the "Preferred Stock"), of
the Corporation and hereby states the designation and number of shares, and
fixes the relative rights, powers and preferences, and qualifications,
limitations and restrictions thereof as follows:

          Section 1.     Designation and Amount.  The shares of such series
                         ----------------------
shall be designated as "Series A Junior Participating Preferred Stock" (the
"Series A Preferred Stock") and the number of shares constituting the Series A
Preferred Stock shall be 2,000,000.  Such number of shares may be increased or
decreased by resolution of the Board of Directors; provided, that no decrease
shall reduce the number of shares of Series A Preferred Stock to a number less
than the number of shares then outstanding plus the number of shares reserved
for issuance upon the exercise of outstanding options, rights or warrants or
upon the conversion of any outstanding securities issued by the Corporation
convertible into Series A Preferred Stock.

          Section 2.     Dividends and Distributions.
                         ---------------------------

          (A)  Subject to the prior and superior rights of the holders of any
     shares of any class or series of stock of this Corporation ranking prior
     and superior to the Series A

                                      A-1
<PAGE>

     Preferred Stock with respect to dividends, the holders of shares of Series
     A Preferred Stock, in preference to the holders of Common Stock, par value
     $.01 per share (the "Common Stock"), of the Corporation, and of any other
     stock ranking junior to the Series A Preferred Stock, shall be entitled to
     receive, when, as and if declared by the Board of Directors out of funds
     legally available for the purpose, quarterly dividends payable in cash on
     the first day of March, June, September and December in each year (each
     such date being referred to herein as a "Quarterly Dividend Payment Date"),
     commencing on the first Quarterly Dividend Payment Date after the first
     issuance of a share or fraction of a share of Series A Preferred Stock, in
     an amount per share (rounded to the nearest cent) equal to the greater of
     (a) $1.00 or (b) subject to the provision for adjustment hereinafter set
     forth, 100 times the aggregate per share amount of all cash dividends, and
     100 times the aggregate per share amount (payable in kind) of all non-cash
     dividends or other distributions, other than a dividend payable in shares
     of Common Stock or a subdivision of the outstanding shares of Common Stock
     (by reclassification or otherwise), declared on the Common Stock since the
     immediately preceding Quarterly Dividend Payment Date or, with respect to
     the first Quarterly Dividend Payment Date, since the first issuance of any
     share or fraction of a share of Series A Preferred Stock. In the event the
     Corporation shall at any time declare or pay any dividend on the Common
     Stock payable in shares of Common Stock, or effect a subdivision,
     combination or consolidation of the outstanding shares of Common Stock (by
     reclassification or otherwise than by payment of a dividend in shares of
     Common Stock) into a greater or lesser number of shares of Common Stock,
     then in each such case the amount to which holders of shares of Series A
     Preferred Stock were entitled immediately prior to such event under clause
     (b) of the preceding sentence shall be adjusted by multiplying such amount
     by a fraction, the numerator of which is the number of shares of Common
     Stock outstanding immediately after such event and the denominator of which
     is the number of shares of Common Stock that were outstanding immediately
     prior to such event.

          (B)  The Corporation shall declare a dividend or distribution on the
     Series A Preferred Stock as provided in paragraph (A) of this Section 2
     immediately after it declares a dividend or distribution on the Common
     Stock (other than a dividend payable in shares of Common Stock); provided
     that, in the event no dividend or distribution shall have been declared on
     the Common Stock during the period between any Quarterly Dividend Payment
     Date and the next subsequent Quarterly Dividend Payment Date, a dividend of
     $1.00 per share on the Series A Preferred Stock shall nevertheless be
     payable on such subsequent Quarterly Dividend Payment Date.

          (C)  Dividends shall begin to accrue and be cumulative on outstanding
     shares of Series A Preferred Stock from the Quarterly Dividend Payment Date
     next preceding the date of issue of such shares, unless the date of issue
     of such shares is prior to the record date for the first Quarterly Dividend
     Payment Date, in which case dividends on such shares shall begin to accrue
     from the date of issue of such shares, or unless the date of issue is a
     Quarterly Dividend Payment Date or is a date after the record date for the
     determination of holders of shares of Series A Preferred Stock entitled to
     receive a

                                      A-2
<PAGE>

     quarterly dividend and before such Quarterly Dividend Payment Date, in
     either of which events such dividends shall begin to accrue and be
     cumulative from such Quarterly Dividend Payment Date. Accrued but unpaid
     dividends shall not bear interest. Dividends paid on the shares of Series A
     Preferred Stock in an amount less than the total amount of such dividends
     at the time accrued and payable on such shares shall be allocated pro rata
     on a share-by-share basis among all such shares at the time outstanding.
     The Board of Directors may fix a record date for the determination of
     holders of shares of Series A Preferred Stock entitled to receive payment
     of a dividend or distribution declared thereon, which record date shall be
     not more than 60 days prior to the date fixed for the payment thereof.

          Section 3.     Voting Rights.  The holders of shares of Series A
                         -------------
Preferred Stock shall have the following voting rights:

          (A)  Subject to the provision for adjustment hereinafter set forth,
     each share of Series A Preferred Stock shall entitle the holder thereof to
     100 votes on all matters submitted to a vote of the stockholders of the
     Corporation.  In the event the Corporation shall at any time declare or pay
     any dividend on the Common Stock payable in shares of Common Stock, or
     effect a subdivision, combination or consolidation of the outstanding
     shares of Common Stock (by reclassification or otherwise than by payment of
     a dividend in shares of Common Stock) into a greater or lesser number of
     shares of Common Stock, then in each such case the number of votes per
     share to which holders of shares of Series A Preferred Stock were entitled
     immediately prior to such event shall be adjusted by multiplying such
     number by a fraction, the numerator of which is the number of shares of
     Common Stock outstanding immediately after such event and the denominator
     of which is the number of shares of Common Stock that were outstanding
     immediately prior to such event.

          (B)  Except as otherwise provided herein, in any other Certificate of
     Designations creating a series of Preferred Stock or any similar stock, or
     by law, the holders of shares of Series A Preferred Stock and the holders
     of shares of Common Stock and any other capital stock of the Corporation
     having general voting rights shall vote together as one class on all
     matters submitted to a vote of stockholders of the Corporation.

          (C)  Except as set forth herein, or as otherwise provided by law,
     holders of Series A Preferred Stock shall have no special voting rights and
     their consent shall not be required (except to the extent they are entitled
     to vote with holders of Common Stock as set forth herein) for taking any
     corporate action.

          Section 4.     Certain Restrictions.
                         --------------------

          (A)  Whenever quarterly dividends or other dividends or distributions
     payable on the Series A Preferred Stock as provided in Section 2 are in
     arrears, thereafter and until all accrued and unpaid dividends and
     distributions, whether or not declared, on

                                      A-3
<PAGE>

     shares of Series A Preferred Stock outstanding shall have been paid in
     full, the Corporation shall not:

               (i)   declare or pay dividends, or make any other distributions,
          on any shares of stock ranking junior (either as to dividends or upon
          liquidation, dissolution or winding up) to the Series A Preferred
          Stock;

               (ii)  declare or pay dividends, or make any other distributions,
          on any shares of stock ranking on a parity (either as to dividends or
          upon liquidation, dissolution or winding up) with the Series A
          Preferred Stock, except dividends paid ratably on the Series A
          Preferred Stock and all such parity stock on which dividends are
          payable or in arrears in proportion to the total amounts to which the
          holders of all such shares are then entitled;

               (iii) redeem or purchase or otherwise acquire for consideration
          shares of any stock ranking junior (either as to dividends or upon
          liquidation, dissolution or winding up) to the Series A Preferred
          Stock, provided that the Corporation may at any time redeem, purchase
          or otherwise acquire shares of any such junior stock in exchange for
          shares of any stock of the Corporation ranking junior (both as to
          dividends and upon dissolution, liquidation or winding up) to the
          Series A Preferred Stock; or

               (iv)  redeem or purchase or otherwise acquire for consideration
          any shares of Series A Preferred Stock, or any shares of stock ranking
          on a parity with the Series A Preferred Stock, except in accordance
          with a purchase offer made in writing or by publication (as determined
          by the Board of Directors) to all holders of such shares upon such
          terms as the Board of Directors, after consideration of the respective
          annual dividend rates and other relative rights and preferences of the
          respective series and classes, shall determine in good faith will
          result in fair and equitable treatment among the respective series or
          classes.

          (B)  The Corporation shall not permit any subsidiary of the
     Corporation to purchase or otherwise acquire for consideration any shares
     of stock of the Corporation unless the Corporation could, under paragraph
     (A) of this Section 4, purchase or otherwise acquire such shares at such
     time and in such manner.

          Section 5.     Reacquired Shares.  Any shares of Series A Preferred
                         -----------------
Stock purchased or otherwise acquired by the Corporation in any manner
whatsoever shall be retired and canceled promptly after the acquisition thereof.
All such shares shall upon their cancellation become authorized but unissued
shares of Preferred Stock and may be reissued as part of a new series of
Preferred Stock subject to the conditions and restrictions on issuance set forth
herein, in the Certificate of Incorporation, or in any other Certificate of
Designations creating a series of Preferred Stock or any similar stock or as
otherwise required by law.

                                      A-4
<PAGE>

          Section 6.     Liquidation, Dissolution or Winding Up.  (A) Upon any
                         --------------------------------------
liquidation, dissolution or winding up of the Corporation, voluntary or
otherwise no distribution shall be made (1) to the holders of shares of stock
ranking junior (either as to dividends or upon liquidation, dissolution or
winding up) to the Series A Preferred Stock unless, prior thereto, the holders
of shares of Series A Preferred Stock shall have received an amount per share
(the "Series A Liquidation Preference") equal to $100 per share, plus an amount
equal to accrued and unpaid dividends and distributions thereon, whether or not
declared, to the date of such payment, provided that the holders of shares of
Series A Preferred Stock shall be entitled to receive an aggregate amount per
share, subject to the provision for adjustment hereinafter set forth, equal to
100 times the aggregate amount to be distributed per share to holders of shares
of Common Stock, or (2) to the holders of shares of stock ranking on a parity
(either as to dividends or upon liquidation, dissolution or winding up) with the
Series A Preferred Stock, except distributions made ratably on the Series A
Preferred Stock and all such parity stock in proportion to the total amounts to
which the holders of all such shares are entitled upon such liquidation,
dissolution or winding up.  In the event the Corporation shall at any time
declare or pay any dividend on the Common Stock payable in shares of Common
Stock, or effect a subdivision, combination or consolidation of the outstanding
shares of Common Stock (by reclassification or otherwise than by payment of a
dividend in shares of Common Stock) into a greater or lesser number of shares of
Common Stock, then in each such case the aggregate amount to which holders of
shares of Series A Preferred Stock were entitled immediately prior to such event
under the proviso in clause (1) of the preceding sentence shall be adjusted by
multiplying such amount by a fraction the numerator of which is the number of
shares of Common Stock outstanding immediately after such event and the
denominator of which is the number of shares of Common Stock that are
outstanding immediately prior to such event.

          (B)  In the event, however, that there are not sufficient assets
     available to permit payment in full of the Series A Liquidation Preference
     and the liquidation preferences of all other classes and series of stock of
     the Corporation, if any, that rank on a parity with the Series A Preferred
     Stock in respect thereof, then the assets available for such distribution
     shall be distributed ratably to the holders of the Series A Preferred Stock
     and the holders of such parity shares in proportion to their respective
     liquidation preferences.

          (C)  Neither the merger or consolidation of the Corporation into or
     with another corporation nor the merger or consolidation of any other
     corporation into or with the Corporation shall be deemed to be a
     liquidation, dissolution or winding up of the Corporation within the
     meaning of this Section 6.

          Section 7.     Consolidation, Merger, etc.  In case the Corporation
                         --------------------------
shall enter into any consolidation, merger, combination or other transaction in
which the shares of Common Stock are exchanged for or changed into other stock
or securities, cash and/or any other property, then in any such case each share
of Series A Preferred Stock shall at the same time be similarly exchanged or
changed into an amount per share, subject to the provision for adjustment
hereinafter set forth, equal to 100 times the aggregate amount of stock,
securities, cash and/or

                                      A-5
<PAGE>

any other property (payable in kind), as the case may be, into which or for
which each share of Common Stock is changed or exchanged. In the event the
Corporation shall at any time declare or pay any dividend on the Common Stock
payable in shares of Common Stock, or effect a subdivision, combination or
consolidation of the outstanding shares of Common Stock (by reclassification or
otherwise than by payment of a dividend in shares of Common Stock) into a
greater or lesser number of shares of Common Stock, then in each such case the
amount set forth in the preceding sentence with respect to the exchange or
change of shares of Series A Preferred Stock shall be adjusted by multiplying
such amount by a fraction, the numerator of which is the number of shares of
Common Stock outstanding immediately after such event and the denominator of
which is the number of shares of Common Stock that were outstanding immediately
prior to such event.

          Section 8.     No Redemption.  The shares of Series A Preferred Stock
                         -------------
shall not be redeemable by the Company.

          Section 9.     Rank.  The Series A Preferred Stock shall rank, with
                         ----
respect to the payment of dividends and the distribution of assets upon
liquidation, dissolution or winding up, junior to all series of any other class
of the Corporation's Preferred Stock, except to the extent that any such other
series specifically provides that it shall rank on a parity with or junior to
the Series A Preferred Stock.

          Section 10.    Amendment.  At any time any shares of Series A
                         ---------
Preferred Stock are outstanding, the Certificate of Incorporation of the
Corporation shall not be amended in any manner which would materially alter or
change the powers, preferences or special rights of the Series A Preferred Stock
so as to affect them adversely without the affirmative vote of the holders of at
least two-thirds of the outstanding shares of Series A Preferred Stock, voting
separately as a single class.

          Section 11.    Fractional Shares.  Series A Preferred Stock may be
                         -----------------
issued in fractions of a share that shall entitle the holder, in proportion to
such holder's fractional shares, to exercise voting rights, receive dividends,
participate in distributions and to have the benefit of all other rights of
holders of Series A Preferred Stock.

          IN WITNESS WHEREOF, this Certificate of Designations is executed on
behalf of the Corporation by its Chairman of the Board this ___ day of _______,
2000.

                                      A-6
<PAGE>

                                                                       EXHIBIT B
                                                                       ---------

                          [Form of Right Certificate]

Certificate No. R-                                                _______ Rights

     NOT EXERCISABLE AFTER DECEMBER 4, 2010 OR EARLIER IF NOTICE OF
     REDEMPTION OR EXCHANGE IS GIVEN OR IF THE COMPANY IS MERGED OR
     ACQUIRED PURSUANT TO AN AGREEMENT OF THE TYPE DESCRIBED IN SECTION
     1.3(ii)(A)(z) OF THE AGREEMENT. THE RIGHTS ARE SUBJECT TO REDEMPTION
     AT $.01 PER RIGHT, AND TO EXCHANGE ON THE TERMS SET FORTH IN THE
     AGREEMENT. UNDER CERTAIN CIRCUMSTANCES (SPECIFIED IN SECTION 11.1.2 OF
                -----------------------------------------------------------
     THE AGREEMENT), RIGHTS BENEFICIALLY OWNED BY OR TRANSFERRED TO AN
     -----------------------------------------------------------------
     ACQUIRING PERSON (AS DEFINED IN THE AGREEMENT), OR ANY SUBSEQUENT
     -----------------------------------------------------------------
     HOLDER OF SUCH RIGHTS WILL BECOME NULL AND VOID AND WILL NO LONGER BE
     ---------------------------------------------------------------------
     TRANSFERABLE.
     ------------

                               Right Certificate

                           VARCO INTERNATIONAL, INC.

          This certifies that           , or registered assigns, is the
registered owner of the number of Rights set forth above, each of which entitles
the owner thereof, subject to the terms, provisions and conditions of the Rights
Agreement, dated as of November 29, 2000, as the same may be amended from time
to time (the "Agreement"), between Varco International, Inc., a Delaware
corporation (the "Company"), and ChaseMellon Shareholder Services, L.L.C., a New
Jersey limited liability company, as Rights Agent (the "Rights Agent"), to
purchase from the Company at any time after the Distribution Date and prior to
5:00 P.M. New York City time on December 4, 2010, at the offices of the Rights
Agent, or its successors as Rights Agent, designated for such purpose, one one-
hundredth of a fully paid, nonassessable share of Series A Junior Participating
Preferred Stock, par value $.01 per share (the "Preferred Shares") of the
Company, at a purchase price of $75 per one one-hundredth of a Preferred Share,
subject to adjustment (the "Purchase Price"), upon presentation and surrender of
this Right Certificate with the Form of Election to Purchase and certification
duly executed. The number of Rights evidenced by this Right Certificate (and the
number of one one-hundredths of a Preferred Share which may be purchased upon
exercise thereof) set forth above, and the Purchase Price set forth above, are
the number and Purchase Price as of December 4, 2000 based on the Preferred
Shares as constituted at such date. Capitalized terms used in this Right
Certificate without definition shall have the meanings ascribed to them in the
Agreement. As provided in the Agreement, the Purchase Price and the number of
Preferred Shares which may be purchased upon the exercise of the Rights
evidenced by this Right Certificate are subject to modification and adjustment
upon the happening of certain events.

                                      B-1
<PAGE>

          This Right Certificate is subject to all of the terms, provisions and
conditions of the Agreement, which terms, provisions and conditions are hereby
incorporated herein by reference and made a part hereof and to which Agreement
reference is hereby made for a full description of the rights, limitations of
rights, obligations, duties and immunities hereunder of the Rights Agent, the
Company and the holders of the Right Certificates.  Copies of the Agreement are
on file at the designated offices of the Company and the Rights Agent.

          This Right Certificate, with or without other Right Certificates, upon
surrender at the offices of the Rights Agent designated for such purpose, may be
exchanged for another Right Certificate or Right Certificates of like tenor and
date evidencing Rights entitling the holder to purchase a like aggregate number
of one one-hundredths of a Preferred Share as the Rights evidenced by the Right
Certificate or Right Certificates surrendered shall have entitled such holder to
purchase.  If this Right Certificate shall be exercised in part, the holder
shall be entitled to receive upon surrender hereof another Right Certificate or
Right Certificates for the number of whole Rights not exercised.

          Subject to the provisions of the Agreement, the Board of Directors
may, at its option, (i) redeem the Rights evidenced by this Right Certificate at
a redemption price of $.01 per Right or (ii) exchange Common Shares for the
Rights evidenced by this Certificate, in whole or in part.

          No fractional Preferred Shares will be issued upon the exercise of any
Right or Rights evidenced hereby (other than fractions of Preferred Shares which
are integral multiples of one one-hundredth of a Preferred Share, which may, at
the election of the Company, be evidenced by depository receipts), but in lieu
thereof a cash payment will be made, as provided in the Agreement.

          No holder of this Right Certificate, as such, shall be entitled to
vote or receive dividends or be deemed for any purpose the holder of the
Preferred Shares or of any other securities of the Company which may at any time
be issuable on the exercise hereof, nor shall anything contained in the
Agreement or herein be construed to confer upon the holder hereof, as such, any
of the rights of a stockholder of the Company or any right to vote for the
election of directors or upon any matter submitted to stockholders at any
meeting thereof, or to give or withhold consent to any corporate action, or to
receive notice of meetings or other actions affecting stockholders (except as
provided in the Agreement), or to receive dividends or subscription rights, or
otherwise, until the Right or Rights evidenced by this Right Certificate shall
have been exercised as provided in the Agreement.

          If any term, provision, covenant or restriction of the Agreement is
held by a court of competent jurisdiction or other authority to be invalid, void
or unenforceable, the remainder of the terms, provisions, covenants and
restrictions of the Agreement shall remain in full force and effect and shall in
no way be affected, impaired or invalidated.

                                      B-2
<PAGE>

          This Right Certificate shall not be valid or binding for any purpose
until it shall have been countersigned by the Rights Agent.

          WITNESS the facsimile signature of the proper officers of the Company
and its corporate seal.  Dated as of ____________, _____.

Attest:                            VARCO INTERNATIONAL, INC.

By ______________________          By _________________________________
   Title:                             Title:

Countersigned:

CHASEMELLON SHAREHOLDER
SERVICES, L.L.C., as Rights Agent

By ____________________________
   Authorized Signature

                                      B-3
<PAGE>

                  [Form of Reverse Side of Right Certificate]

                              FORM OF ASSIGNMENT
                              ------------------

            (To be executed by the registered holder if such holder
                  desires to transfer the Right Certificate.)

FOR VALUE RECEIVED _____________________________________________________________
hereby sells, assigns and transfers unto _______________________________________
________________________________________________________________________________
________________________________________________________________________________

                        (Please print name and address
                                of transferee)

Rights evidenced by this Right Certificate, together with all right, title and
interest therein, and does hereby irrevocably constitute and appoint
________________ Attorney, to transfer the within Right Certificate on the books
of the within-named Company, with full power of substitution.

Dated:  ________________

                                   _________________________________
                                   Signature

Signature Guaranteed:

_______________________

          Signatures must be guaranteed by an "eligible guarantor institution"
as defined in Rule 17Ad-15 promulgated under the Securities Exchange Act of
1934, as amended.

                                      B-4
<PAGE>

________________________________________________________________________________

The undersigned hereby certifies that:

          (1)  the Rights evidenced by this Right Certificate are not
beneficially owned by and are not being assigned to an Acquiring Person or an
Affiliate or an Associate thereof; and

          (2)  after due inquiry and to the best knowledge of the undersigned,
the undersigned did not acquire the Rights evidenced by this Right Certificate
from any person who is, was or subsequently became an Acquiring Person or an
Affiliate or Associate thereof.

Dated: _________________

                                   _______________________________
                                   Signature

                                      B-5
<PAGE>

                         FORM OF ELECTION TO PURCHASE
                         ----------------------------

                     (To be executed if holder desires to
                       exercise the Right Certificate.)

To: Varco International, Inc.

          The undersigned hereby irrevocably elects to exercise ________________
Rights represented by this Right Certificate to purchase the Preferred Shares
issuable upon the exercise of such Rights (or such other securities or property
of the Company or of any other Person which may be issuable upon the exercise of
the Rights) and requests that certificates for such shares be issued in the name
of:

____________________________________________________________
(Please print name and address)

____________________________________________________________

If such number of Rights shall not be all the Rights evidenced by this Right
Certificate, a new Right Certificate for the balance remaining of such Rights
shall be registered in the name of and delivered to:

Please insert social security
or other identifying number

____________________________________________________________
          (Please print name and address)

____________________________________________________________

Dated: __________________

                                   ______________________________
                                   Signature

Signature Guaranteed:

____________________________

          Signatures must be guaranteed by an "eligible guarantor institution"
as defined in Rule 17Ad-15 promulgated under the Securities Exchange Act of
1934, as amended.

                                      B-6
<PAGE>

The undersigned hereby certifies that:

          (1)  the Rights evidenced by this Right Certificate are not
beneficially owned by and are not being assigned to an Acquiring Person or an
Affiliate or an Associate thereof; and

          (2)  after due inquiry and to the best knowledge of the undersigned,
the undersigned did not acquire the Rights evidenced by this Right Certificate
from any person who is, was or subsequently became an Acquiring Person or an
Affiliate or Associate thereof.

Dated:  _____________________

                                   _______________________________
                                   Signature

________________________________________________________________________________

                                    NOTICE
                                    ------

          The signature in the foregoing Form of Assignment and Form of Election
to Purchase must conform to the name as written upon the face of this Right
Certificate in every particular, without alteration or enlargement or any change
whatsoever.

          In the event the certification set forth above in the Form of
Assignment or Form of Election to Purchase is not completed, the Company will
deem the beneficial owner of the Rights evidenced by this Right Certificate to
be an Acquiring Person or an Affiliate or Associate hereof and such Assignment
or Election to Purchase will not be honored.

                                      B-7
<PAGE>

                                                                       EXHIBIT C
                                                                       ---------

            As described in the Rights Agreement, Rights which are
            ------------------------------------------------------
        held by or have been held by an Acquiring Person or Associates
        --------------------------------------------------------------
    or Affiliates thereof (as defined in the Rights Agreement) and certain
    ----------------------------------------------------------------------
     transferees thereof shall become null and void and will no longer be
     --------------------------------------------------------------------
                                 transferable.
                                 ------------

                        SUMMARY OF RIGHTS TO PURCHASE
                               PREFERRED SHARES

          On November 9, 2000 the Board of Directors of Varco International,
Inc. (the "Company") declared a dividend of one preferred share purchase right
(a "Right") for each share of common stock, $.01 par value (the "Common
Shares"), of the Company outstanding at the close of business on December 4,
2000 (the "Record Date").  As long as the Rights are attached to the Common
Shares, the Company will issue one Right (subject to adjustment) with each new
Common Share so that all such shares will have attached Rights.  When
exercisable, each Right will entitle the registered holder to purchase from the
Company one one-hundredth of a share of Series A Junior Participating Preferred
Stock (the "Preferred Shares") at a price of $75 per one one-hundredth of a
Preferred Share, subject to adjustment (the "Purchase Price").  The description
and terms of the Rights are set forth in a Rights Agreement, dated as of
November 29, 2000, as the same may be amended from time to time (the
"Agreement"), between the Company and ChaseMellon Shareholder Services, L.L.C.,
as Rights Agent (the "Rights Agent").

          Except as otherwise provided in the Agreement, until the earlier to
occur of (i) ten (10) days following a public announcement that a Person or
group of affiliated or associated Persons (other than L.E. Simmons and his
associates and affiliates) has acquired, or obtained the right to acquire,
beneficial ownership of 15% or more of the Common Shares (an "Acquiring Person")
or (ii) ten (10) business days (or such later date as may be determined by
action of the Board of Directors prior to such time as any Person or group of
affiliated Persons becomes an Acquiring Person) following the commencement or
announcement of an intention to make a tender offer or exchange offer the
consummation of which would result in the beneficial ownership by a Person or
group of 15% or more of the Common Shares (the earlier of (i) and (ii) being
called the "Distribution Date"), the Rights will be evidenced, with respect to
any of the Common Share certificates outstanding as of the Record Date, by such
Common Share certificate together with a copy of this Summary of Rights.

          The Agreement provides that until the Distribution Date (or earlier
redemption exchange, termination, or expiration of the Rights), the Rights will
be transferred with and only with the Common Shares.  Until the Distribution
Date (or earlier redemption or expiration of the Rights), new Common Share
certificates issued after the close of business on the Record Date upon transfer
or new issuance of the Common Shares will contain a notation incorporating the
Agreement by reference.  Until the Distribution Date (or earlier redemption,
exchange, termination or expiration of the Rights), the surrender for transfer
of any certificates for Common Shares, with or without such notation or a copy
of this Summary of Rights, will also constitute

                                      C-1
<PAGE>

the transfer of the Rights associated with the Common Shares represented by such
certificate. As soon as practicable following the Distribution Date, separate
certificates evidencing the Rights ("Right Certificates") will be mailed to
holders of record of the Common Shares as of the close of business on the
Distribution Date and such separate Right Certificates alone will evidence the
Rights.

          The Rights are not exercisable until the Distribution Date.  The
Rights will expire on December 4, 2010, subject to the Company's right to extend
such date (the "Final Expiration Date"), unless earlier redeemed or exchanged by
the Company or terminated.

          Each Preferred Share purchasable upon exercise of the Rights will be
entitled, when, as and if declared, to a minimum preferential quarterly dividend
payment of $1.00 per share but will be entitled to an aggregate dividend of 100
times the dividend, if any, declared per Common Share. In the event of
liquidation, dissolution or winding up of the Company, the holders of the
Preferred Shares will be entitled to a minimum preferential liquidation payment
of $100 per share (plus any accrued but unpaid dividends) but will be entitled
to an aggregate payment of 100 times the payment made per Common Share.  Each
Preferred Share will have 100 votes and will vote together with the Common
Shares.  Finally, in the event of any merger, consolidation or other transaction
in which Common Shares are exchanged, each Preferred Share will be entitled to
receive 100 times the amount received per Common Share.  Preferred Shares will
not be redeemable.  These rights are protected by customary antidilution
provisions.  Because of the nature of the Preferred Share's dividend,
liquidation and voting rights, the value of one one-hundredth of a Preferred
Share purchasable upon exercise of each Right should approximate the value of
one Common Share.

          The Purchase Price payable, and the number of Preferred Shares or
other securities or property issuable, upon exercise of the Rights are subject
to adjustment from time to time to prevent dilution (i) in the event of a stock
dividend on, or a subdivision, combination or reclassification of the Preferred
Shares, (ii) upon the grant to holders of the Preferred Shares of certain rights
or warrants to subscribe for or purchase Preferred Shares or convertible
securities at less than the current market price of the Preferred Shares or
(iii) upon the distribution to holders of the Preferred Shares of evidences of
indebtedness, cash, securities or assets (excluding regular periodic cash
dividends at a rate not in excess of 125% of the rate of the last regular
periodic cash dividend theretofore paid or, in case regular periodic cash
dividends have not theretofore been paid, at a rate not in excess of 50% of the
average net income per share of the Company for the four quarters ended
immediately prior to the payment of such dividend, or dividends payable in
Preferred Shares (which dividends will be subject to the adjustment described in
clause (i) above)) or of subscription rights or warrants (other than those
referred to above).

          In the event that a Person becomes an Acquiring Person or if the
Company were the surviving corporation in a merger with an Acquiring Person or
any affiliate or associate of an Acquiring Person and the Common Shares were not
changed or exchanged, each holder of a Right, other than Rights that are or were
acquired or beneficially owned by the Acquiring Person (which Rights will
thereafter be null and void), will thereafter have the right to receive upon
exercise that number of Common Shares having a market value of two times the
then current

                                      C-2
<PAGE>

Purchase Price of the Right. In the event that, after a Person has become an
Acquiring Person, the Company were acquired in a merger or other business
combination transaction or more than 50% of its assets or earning power were
sold, proper provision shall be made so that each holder of a Right shall
thereafter have the right to receive, upon the exercise thereof at the then
current Purchase Price of the Right, that number of shares of common stock of
the acquiring company which at the time of such transaction would have a market
value of two times the then current Purchase Price of the Right.

          At any time after a Person becomes an Acquiring Person and prior to
the earlier of one of the events described in the last sentence of the previous
paragraph or the acquisition by such Acquiring Person of 50% or more of the
outstanding Common Shares, the Board of Directors may cause the Company to
exchange the Rights (other than Rights owned by an Acquiring Person which will
have become null and void), in whole or in part, for Common Shares at an
exchange rate of one Common Share per Right (subject to adjustment).

          No adjustment in the Purchase Price will be required until cumulative
adjustments require an adjustment of at least 1% in such Purchase Price.  No
fractional Preferred Shares or Common Shares will be issued (other than
fractions of Preferred Shares which are integral multiples of one one-hundredth
of a Preferred Share, which may, at the election of the Company, be evidenced by
depository receipts), and in lieu thereof, a payment in cash will be made based
on the market price of the Preferred Shares or Common Shares on the last trading
date prior to the date of exercise.

          The Rights may be redeemed in whole, but not in part, at a price of
$.01 per Right (the "Redemption Price") by the Board of Directors at any time
prior to the time that an Acquiring Person has become such.  The redemption of
the Rights may be made effective at such time, on such basis and with such
conditions as the Board of Directors in its sole discretion may establish.
Immediately upon any redemption of the Rights, the right to exercise the Rights
will terminate and the only right of the holders of Rights will be to receive
the Redemption Price.

          Until a Right is exercised, the holder thereof, as such, will have no
rights as a stockholder of the Company beyond those as an existing stockholder,
including, without limitation, the right to vote or to receive dividends.

          Any of the provisions of the Agreement may be amended by the Board of
Directors of the Company for so long as the Rights are then redeemable, and
after the Rights are no longer redeemable, the Company may amend or supplement
the Agreement in any manner that does not adversely affect the interests of the
Rights Agent or the holders of the Rights (other than an Acquiring Person or an
affiliate or associate of an Acquiring Person).  The Company may at any time
prior to such time as any Person becomes an Acquiring Person amend the Agreement
to lower the thresholds described above to no less than the greater of (i) any
percentage greater than the largest percentage of the outstanding Common Shares
then known by the Company to be beneficially owned by any Person or group of
affiliated or associated persons (other than an certain exempt Persons) and (ii)
10%.

                                      C-3
<PAGE>

          A copy of the Agreement has been filed with the Securities and
Exchange Commission as an Exhibit to a Current Report on Form 8-K.  A copy of
the Agreement is available free of charge from the Company.  This summary
description of the Rights does not purport to be complete and is qualified in
its entirety by reference to the Agreement, which is incorporated herein by
reference.

                                      C-4<PAGE>

                                                                     EXHIBIT 4.3

================================================================================

                         NEUROCRINE BIOSCIENCES, INC.

                 INFORMATION AND REGISTRATION RIGHTS AGREEMENT

================================================================================
<PAGE>

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                            Page
                                                                                            ----
<S>                                                                                         <C>
1.   Certain Definitions....................................................................  1
     -------------------

2.   Information Rights.....................................................................  2
     ------------------
     2.1  Financial Statements..............................................................  2
          --------------------
     2.2  Additional Information............................................................  3
          ----------------------

3.   Inspection.............................................................................  3
     ----------

4.   Right of First Refusal.................................................................  3
     ----------------------

5.   Termination of Covenants...............................................................  5
     ------------------------

6.   Demand Registration....................................................................  5
     -------------------
     6.1  Request for Registration on Form Other Than Form S-3..............................  5
          ----------------------------------------------------
     6.2 Right of Deferral of Registration on Form Other Than Form S-3.....................   5
         -------------------------------------------------------------
     6.3 Request for Registration on Form S-3..............................................   5
         ------------------------------------
     6.4 Registration of Other Securities in Demand Registration...........................   6
         -------------------------------------------------------
     6.5 Underwriting in Demand Registration...............................................   6
         -----------------------------------
     6.6 Blue Sky in Demand Registration...................................................   7
         -------------------------------

7.   Piggyback Registration.................................................................  7
     ----------------------
     7.1 Notice of Piggyback Registration and Inclusion of Registrable Securities...........  7
         ------------------------------------------------------------------------
     7.2 Underwriting in Piggyback Registration.............................................  7
         --------------------------------------
     7.3 Blue Sky in Piggyback Registration.................................................  8
         ----------------------------------

8.   Expenses of Registration...............................................................  8
     ------------------------

9.   Registration Procedures................................................................  9
     -----------------------

10.  Information Furnished by Holder........................................................  9
     -------------------------------

11.  Indemnification........................................................................  9
     ---------------
     11.1 Company's Indemnification of Holders.............................................. 10
          ------------------------------------
     11.2 Holder's Indemnification of Company............................................... 10
          -----------------------------------
     11.3 Indemnification Procedure......................................................... 11
          -------------------------

12.  Limitations on Registration Rights Granted to Other Securities......................... 11
     --------------------------------------------------------------

13.  Reports Under Securities Exchange Act of 1934.......................................... 12
     ---------------------------------------------

14.  Market Stand-off....................................................................... 12
     ----------------

15.  Conversion of Preferred Stock.......................................................... 12
     -----------------------------

16.  Termination of Registration Rights..................................................... 12
     ----------------------------------
</TABLE>

                                       i
<PAGE>

<TABLE>
<S>                                                                              <C>
17.  Transfer of Rights........................................................  13
     ------------------

18. Miscellaneous..............................................................  13
    -------------
    18.1 Entire Agreement; Successors and Assigns..............................  13
         ----------------------------------------
    18.2 Governing Law.........................................................  13
         -------------
    18.3 Counterparts..........................................................  13
         ------------
    18.4 Headings..............................................................  13
         --------
    18.5 Notices...............................................................  13
         -------
    18.6 Amendment of Agreement................................................  14
         ----------------------
    18.7 Aggregation of Stock..................................................  14
         --------------------
    18.8 Severability..........................................................  14
         ------------
</TABLE>

                                      ii
<PAGE>

                 INFORMATION AND REGISTRATION RIGHTS AGREEMENT

          This INFORMATION AND REGISTRATION RIGHTS AGREEMENT (the "Agreement")
is made as of September 25, 1992, by and among Neurocrine Biosciences, Inc., a
California corporation (the "Company"), the persons listed on the attached
Schedule A who become signatories to this Agreement (collectively, the
"Investors"), and the persons listed on the attached Schedule B who become
signatories to this Agreement (collectively, the "Founders").

                                R E C I T A L S
                                ---------------

          A.   The Company and the Investors have entered into agreements for
sale by the Company and purchase by the Investors of the Company's securities.

          B.   In connection with the purchase and sale of the Company's
securities, the Company and the Investors desire to provide for (i) the rights
of the Investors with respect to information about the Company and registration
of the Common Stock issued upon conversion or exercise of the shares of the
Company's stock held by the Investors according to the terms of this Agreement,
(ii) a right of first refusal for the Investors with respect to certain future
stock issuances by the Company, and (iii) certain other provisions as set forth
below.

          THE PARTIES AGREE AS FOLLOWS:

     1.   Certain Definitions.
          -------------------

          As used in this Agreement, the following terms shall have the
following respective meanings:

          (a)  "Commission" shall mean the Securities and Exchange Commission or
                ----------
any other federal agency at the time administering the Securities Act.

          (b)  "Convertible Securities" shall mean securities of the Company
                ----------------------
convertible into or exchangeable for Registrable Securities, including the
Series A Preferred Stock, and any other securities of the Company convertible
into or exchangeable for Registrable Securities included in this Agreement
pursuant to Section 12.

          (c)  "Form S-3" shall mean Form S-3 issued by the Commission or any
                --------
substantially similar form then in effect.

          (d)  "Founders' Stock" shall mean all Common Stock of the Company
                ---------------
currently held by the Founders and the Investors, any Common Stock subsequently
acquired by such persons (other than Common Stock issued or issuable upon
conversion of Series A Preferred Stock), and any Common Stock issued or issuable
with respect to such Common Stock upon any stock splits, stock dividends or
similar distributions.

          (e)  "Holder" shall mean any holder of outstanding Registrable
                ------
Securities which have not been sold to the public, but only if such holder is an
Investor (or,
<PAGE>

solely with regard to Sections 7, 11 and 14, a Founder) or an assignee or
transferee of Registration rights as permitted by Section 17.

          (f)  "Initiating Holders" shall mean Holders who in the aggregate hold
                ------------------
at least forty percent (40%) of the Registrable Securities.

          (g)  "Material Adverse Event" shall mean an occurrence having a
                ----------------------
consequence that either (a) is materially adverse as to the business,
properties, prospects or financial condition of the Company or (b) is reasonably
foreseeable, has a reasonable likelihood of occurring, and if it were to occur
would materially adversely affect the business, properties, prospects or
financial condition of the Company.

          (h)  The terms "Register", "Registered" and "Registration" refer to a
                          --------    ----------       ------------
registration effected by preparing and filing a registration statement in
compliance with the Securities Act ("Registration Statement"), and the
declaration or ordering of the effectiveness of such Registration Statement.

          (i)  "Registrable Securities" shall mean all Common Stock of the
                ----------------------
Company issued or issuable upon conversion of the Company's Series A Preferred
Stock purchased by or issued to the Investors, including Common Stock issued
pursuant to stock splits, stock dividends and similar distributions with respect
to such shares, and any securities of the Company granted registration rights
pursuant to Section 12 of this Agreement, provided that such shares have not
previously been sold to the public.  For purposes of the registration rights
granted to holders of Company securities pursuant to Section 7 hereof and for
purposes of the obligations imposed upon holders of Registrable Securities under
Sections 11 and 14, but not for the definition of Initiating Holders,
"Registrable Securities" shall include Founders' Stock.

          (j)  "Registration Expenses" shall mean all expenses incurred in
                ---------------------
complying with Sections 6 or 7 of this Agreement, including, without limitation,
all federal and state registration, qualification and filing fees, printing
expenses, fees and disbursements of counsel for the Company, blue sky fees and
expenses, and the expense of any special audits incident to or required by any
such registration, other than Selling Expenses.

          (k)  "Securities Act" shall mean the Securities Act of 1933, as
                --------------
amended, or any similar federal statute, and the rules and regulations of the
Commission thereunder, all as the same shall be in effect at the time.

          (l)  "Selling Expenses" shall mean all underwriting discounts and
                ----------------
selling commissions applicable to the sale of Registrable Securities pursuant to
this Agreement, as well as fees and disbursements of legal counsel for the
selling Holders.

     2.   Information Rights.
          ------------------

          2.1  Financial Statements. The Company shall deliver to the Investors
               --------------------
as soon as practicable after the end of each fiscal year of the Company, and in
any event without 120 days thereafter, an audited consolidated balance sheets of
the Company as of the end of such year and audited consolidated statements of
income, shareholders' equity and cash flows for such year, which year-end
financial reports shall be in reasonable detail and shall be prepared in

                                       2
<PAGE>

accordance with generally accepted accounting principles and be accompanied by
the opinion of independent public accountants of recognized standing selected by
the Board of Directors of the Company.

          2.2  Additional Information. As long as an Investor holds not less
               ----------------------
than 500,000 shares of Convertible Securities and/or Registrable Securities, as
adjusted for recapitalizations, stock splits, stock dividends and the like, the
Company will deliver to such Investor:

          (a)  As soon as practicable after the end of each month, and in any
event within 30 days thereafter, consolidated balance sheets of the Company and
its subsidiaires, if any, as of the end of such month, and consolidated
statements of income and cash flow for such month and for the current fiscal
year to date, including a comparison between the actual monthly financial
statements and the projected figures for such monthly periods.

          (b)  As soon as practicable following submission to and approval by
the Board of Directors of the Company, but in no event later than 30 days prior
to the beginning of each fiscal year, an operating budget and plan for the
Company respecting the next fiscal year containing a monthly breakdown of income
and cash flow.

          (c)  As soon as practicable after the end of each fiscal quarter, and
in any event within 30 days thereafter, a statement of shareholders' equity as
of the end of such fiscal quarter and a statement showing the number of shares
of each class and series of capital stock and securities convertible into or
exercisable for shares of capital stock outstanding at the end of the period,
the number of shares of Common Stock issuable upon conversion or exercise of any
outstanding securities convertible or exercisable for shares of Common Stock and
the exchange ratio or exercise price applicable thereto, all in sufficient
detail as to permit the Investor to calculate its percentage equity ownership in
the Company.

     3.   Inspection.
          ----------

          The Company shall permit each Investor holding the number of shares
set forth in Section 2.2 hereof, at such Investor's expense, to visit and
inspect the Company's properties, to examine its books of account and records
and to discuss the Company's affairs, finances and accounts with its officers,
all at such reasonable times as may be requested by each such Investor;
provided, however, that the Company shall not be obligated pursuant to this
Section 3 to provide any information which it reasonably considers to be a trade
secret or confidential information. The rights of an Investor under this Section
3 may not be assigned as part of such Investor's sale of any of the Registrable
Securities or Convertible Securities except with the consent of the Company,
which consent shall not be unreasonably withheld.

     4.   Right of First Refusal.
          ----------------------

          The Company hereby grants to each Investor the right of first refusal
to purchase its Pro Rata Amount (as defined below) of any New Securities (as
defined in this Section 4) which the Company may, from time to time, propose to
sell and issue. An Investor's Pro Rata Amount, for purposes of this :right of
first refusal, shall be the ratio of (i) the number of shares (on an as-
converted basis) of Convertible Securities and/or Registrable Securities held by
such

                                       3
<PAGE>

Investor to (ii) the total number of shares of Common Stock of the Company
outstanding (on an as-converted basis), including all outstanding securities
convertible into, exchangeable for or exercisable for Common Stock on an as-
converted or exercised basis (including but not limited to the Convertible
Securities and outstanding options exercisable for Common Stock). This right of
first refusal shall be subject to the following provisions:

               (a)  "New Securities" shall mean any capital stock of the Company
whether or not now authorized, the rights, options or warrants to purchase
capital stock and securities of any type whatsoever that are, or may become,
convertible into capital stock; provided that the term "New Securities" does not
include (i) securities issuable upon exercise or conversion of currently
outstanding securities; (ii) the Series A Preferred Stock; (iii) securities
issued pursuant to an underwritten public offering pursuant to an effective
Registration Statement; (iv) securities issued pursuant to the Company's
acquisition of another corporation by merger, purchase of substantially all
assets or other reorganization; (v) securities issued to employees, officers,
directors, or consultants of the Company pursuant to plans and arrangements
approved by the Board of Directors; (vi) securities issued in connection with
equipment lease financing arrangements, credit agreements or other commercial
transactions approved by the Board of Directors; (vii) securities issued
pursuant to a corporate strategic partner transaction involving the license of
technology, establishment of a joint venture, research and development
agreement, product development or marketing agreement, or other similar
arrangement; and (viii) securities issued in connection with any stock split,
stock dividend or recapitalization of the Company.

               (b)  In the event the Company proposes to undertake an issuance
of New Securities, it shall live each Investor written notice of its intention,
describing the type of New Securities, the price and number of snares and the
general terms upon which the Company proposes to issue the same. Each Investor
shall have twenty (20) days from the date of receipt of any such notice to agree
to purchase up to the amount of New Securities equal to the Investor's Pro Rata
Amount of such New Securities for the price and upon the general terms specified
in the notice by giving written notice to the Company. Each Investor shall have
a right of overallotment such that if any investor fails to exercise its right
hereunder to purchase all of such Investor's Pro Rata Amount of New Securities,
the Company shall notify the other Investor(s) exercising their rights to
purchase their full Pro Rata Amount and such other Investor(s) shall have the
right to purchase the non fully-participating investor's unpurchased portion on
a pro rata basis (based upon the ratio of the number of shares (on an as-
converted basis) of Convertible Securities and/or Registrable Securities held by
each such Investor to the total number of shares (on an as-converted basis) of
Registrable Securities and/or Convertible Securities held by all fully-
participating Investors) by agreeing to purchase such amount of New Securities
within ten (10) days from the date such notice shall have been deemed given
under Section 18.5.

               (c)  In the event an Investor fails to exercise in full the right
of first refusal within said twenty (20) day period, the Company shall have one
hundred twenty (120) days thereafter to sell the New Securities respecting which
the Investor's option was not exercised. at the price and upon the terms
specified in the Company's notice. In the event the Company has not sold the New
Securities within said one hundred and twenty (120) day period, the Company
shall not thereafter issue or sell any New Securities, without first offering
such securities to the investors in the manner provided above.

                                       4
<PAGE>

     5.   Termination of Covenants.
          ------------------------

          Except as otherwise provided herein, the covenants of the Company set
forth in Sections 2, 3 and 4 shall be terminated and be of no further force or
effect upon the closing of the Company's initial public offering of its Common
Stock at a price per share (prior to underwriter commissions and offering
expenses) of not less than $1.50 per share (appropriately adjusted for any stock
splits, stock dividends, recapitalizations and similar events) and an aggregate
offering price to the public of more than $7,500,000 (prior to deduction of
underwriter commissions and offering expenses) pursuant to a Registration
Statement filed by the Company under the Securities Act ("IPO").

     6.   Demand Registration.
          -------------------

          6.1  Request for Registration on Form Other Than Form S-3. Subject to
               ----------------------------------------------------
terms of this Agreement, in the event that the Company shall receive from the
Initiating Holders at any time after the earlier of (i) December 31, 1996, or
(ii) three months after the effective date of the IPO, a written request that
the Company effect any Registration with respect to all or a part of the
Registrable Securities on a Form other than Form S-3 for an offering of at least
thirty-three percent (33%) of the then outstanding Registrable Securities (or
any lesser percent if the reasonably anticipated aggregate offering price to the
public would exceed $5,000,000), the Company shall (i) promptly give written
notice of the proposed Registration to all other Holders and shall (ii) as soon
as practicable, and in any event within ninety (90) days of such request, use
its best efforts to effect Registration of the Registrable Securities specified
in such request, together with any Registrable Securities of any Holder joining
in such request as are specified in a written request given within 20 days after
written notice from the Company. The Company shall not be obligated to take any
action to effect any such registration pursuant to this Section 6.1 (i) within
three (3) months of the effective date of a Registration initiated by the
Company or (ii) after the Company has effected two such Registrations pursuant
to this Section 6.1 and such Registrations have been declared effective and, if
underwritten, have closed.

          6.2  Right of Deferral of Registration on Form Other Than Form S-3. If
               -------------------------------------------------------------
If the Company shall furnish to all such Holders who joined in the request a
certificate signed by the President of the Company stating that, in the good
faith judgment of the Board of Directors of the Company, it would be seriously
detrimental to the Company for any Registration to be effected as requested
under Section 6.1, the Company shall have the right, exercisable one time only,
to defer the filing of a Registration Statement with respect to such offering
for a period of not more than ninety (90) days from delivery of the request of
the Initiating Holders; provided, however, that the Company may not utilize this
right more than once in any 12-month period.

          6.3  Request for Registration on Form S-3. Subject to the terms of
               ------------------------------------
this Agreement, in the event that the Company receives from Holders a written
request that the Company effect any Registration on Form S-3 (or any successor
form to Form S-3 regardless of its designation) at a time when the Company is
eligible to register securities on Form S-3 (or any successor form to Form S-3
regardless of its designation) for an offering of Registrable Securities the
reasonably anticipated aggregate offering price to the public of which would
exceed $500,000, the Company will promptly give written notice of the proposed
Registration to all the Holders and will as soon as practicable use its best
efforts to effect Registration of the

                                       5
<PAGE>

Registrable Securities specified in such request, together with all or such
portion of the Registrable Securities of any Holder joining in such request as
are specified in a written request delivered to the Company within 30 days after
written notice from the Company of the proposed Registration.

          6.4  Registration of Other Securities in Demand Registration. Any
               -------------------------------------------------------
Registration Statement filed pursuant to the request of the initiating Holders
under this Section 6 may, subject to the provisions of Section 6.5, include
securities of the Company other than Registrable Securities.

          6.5  Underwriting in Demand Registration.
               -----------------------------------

                    6.5.1  Notice of Underwriting. If the Initiating Holders
                           ----------------------
intend to distribute the Registrable Securities covered by their request by
means of an underwriting, they shall so advise the Company as a part of their
request :made pursuant to this Section 6, and the Company shall include such
information in the written notice referred to in Section 6.1 or 6.3. The right
of any Holder to Registration pursuant to Section 6.1 shall be conditioned upon
such Holders agreement to participate in such underwriting and the inclusion of-
such Holders Registrable Securities in the underwriting (unless otherwise
mutually agreed by a majority in interest of the Initiating Holders and such
Holder with respect to such participation and inclusion).

                    6.5.2  Inclusion of Other Holders in Demand Registration. If
                           -------------------------------------------------
the Company, officers or directors of the Company holding Common Stock other
than Registrable Securities or holders of securities other than Registrable
Securities, request inclusion in such Registration, the Initiating Holders, to
the extent they deem advisable and consistent with the goals of such
Registration and subject to the allocation provisions of Section 6.5.4 below,
shall, on behalf of all Holders, offer to any or all of the Company, such
officers or directors and such holders of securities other than Registrable
Securities that such securities other than Registrable Securities be included in
the underwriting and may condition such offer on the acceptance by such persons
of the terms of this Section 6.

                    6.5.3  Selection of Underwriter in Demand Registration. The
                           -----------------------------------------------
Company shall (together with all Holders proposing to distribute their
securities through such underwriting) enter into and perform its obligations
under an underwriting agreement in usual and customary form with the
representative ("Underwriter's Representative") of the underwriter or
underwriters selected for such underwriting by the Holders of a majority of the
Registrable Securities being registered by the Initiating Holders and consented
to by the Company (which consent shall not be unreasonably withheld).

                    6.5.4  Marketing Limitation in Demand Registration. In the
                           -------------------------------------------
event the Underwriter's Representative advises the Initiating Holders in writing
that market factors (including, without limitation, the aggregate number of
shares of Common Stock requested to be Registered, the general condition of the
market, and the status of the persons proposing to sell securities pursuant to
the Registration) require a limitation of the number of shares to be
underwritten, then the Initiating Holders shall so advise all Holders, and the
number of shares of Registrable Securities that may be included in the
Registration and underwriting shall be

                                       6
<PAGE>

allocated among all Holders in proportion, as nearly as practicable, to the
number of shares proposed to be included in such Registration by such Holder;
provided, however, that the number of shares of Registrable Securities to be
included in such underwriting shall not be reduced unless all other securities
(including those proposed to be included by the Company) are first entirely
excluded from the underwriting. No Registrable Securities or other securities
excluded from the underwriting by reason of this Section 6.5.4 shall be included
in such Registration Statement:

                    6.5.5  Right of Withdrawal in Demand Registration. If any
                           ------------------------------------------
Holder of Registrable Securities, or a holder of other securities entitled (upon
request) to be included in such Registration, disapproves of the terms of the
underwriting, such person may elect to withdraw therefrom by written notice to
the Company, the underwriter and the Initiating Holders delivered at least seven
days prior to the effective date of the Registration Statement. The securities
so withdrawn shall also be withdrawn from the Registration Statement.

          6.6  Blue Sky in Demand Registration. In the event of any Registration
               -------------------------------
pursuant to Section 6, the Company will exercise its best efforts to Register
and qualify the securities covered by the Registration Statement under such
other securities or Blue Sky laws of such jurisdictions as the Holders shall
reasonably request and as shall be reasonably appropriate for the distribution
of such securities; provided, however, that the Company shall not be required to
qualify to do business or to file a general consent to service of process in any
such states or jurisdictions.

     7.   Piggyback Registration.
          ----------------------

          7.1  Notice of Piggyback Registration and Inclusion of Registrable
               -------------------------------------------------------------
Securities. Subject to the terms of this Agreement, in the event the Company
----------
decides to Register any of its Common Stock (either for its own account or the
account of a security holder or holders exercising their respective demand
registration rights) on a form that would be suitable for a registration
involving solely Registrable Securities, the Company will: (i) promptly give
each Holder written notice thereof which shall include a list of the
jurisdictions in which the Company intends to attempt to qualify such securities
under the applicable Blue Sky or other state securities laws) and (ii) include
in such Registration and any related qualification under Blue Sky laws or other
compliance), and in any underwriting involved therein, all the Registrable
Securities specified in a written request delivered to the Company by any Holder
within twenty (20) days after delivery of such written notice from the Company.

          7.2  Underwriting in Piggyback Registration.
               --------------------------------------

                    7.2.1  Notice of Underwriting in Piggyback Registration. If
                           ------------------------------------------------
the Registration of which the Company gives notice is for a Registered public
offering involving an underwriting, :he Company shall so advise the Holders as a
part of the written. notice given pursuant to Section 7.1. In such event the
right of any Holder to Registration shall be conditioned upon such underwriting
and the inclusion of such Holder's Registrable Securities in such underwriting
to the extent provided in this Section 7. All Holders proposing to distribute
their securities through such underwriting shall (together with the Company and
the other holders distributing their securities through such underwriting) enter
into an underwriting agreement

                                       7
<PAGE>

with the Underwriter's Representative for such offering. The Holders shall have
no right to participate in the selection of the underwriters for an offering
pursuant to this Section 7.

                    7.2.2  Marketing Limitation in Piggyback Registration. In
                           ----------------------------------------------
the event the Underwriter's Representative advises the Holders seeking
registration of Registrable Securities pursuant to Section 7 in writing that
market factors (including, without limitation, the aggregate number of shares of
Common Stock requested to be Registered, the general condition of the market,
and the status of the persons proposing to sell securities pursuant to the
Registration) require a limitation of the number of shares to be underwritten,
the Underwriter's Representative may:

               (a)  in the case of the Company's initial public offering,
exclude some or all Registrable Securities from such registration and
underwriting; and

               (b)  in the case of any Registered public offering subsequent to
the Company's initial public offering, limit the number of shares of Registrable
Securities to be included in such Registration and underwriting to not less than
twenty percent (20%) of the total number of shares included in such
Registration. In such event, the Underwriters Representative shall so advise all
Holders and the number of shares of Registrable Securities that may be included
in the Registration and underwriting (if any) shall be allocated as follows:
first, among all Holders of Registrable Securities excluding Holders who solely
hold Founders' Stock) in proportion, as nearly as practicable, to the respective
amounts, of Registrable Securities (excluding Founders' Stock) held by such
Holders at the time of filing of the registration statement, and second, among
all Holders of Founders' Stock, in proportion, as nearly as practicable, to the
respective amounts of Founders' Stock held by such Holders at the time of filing
of the registration statement. The number of shares of Registrable Securities to
be :included in such underwriting shall not be reduced unless all other
securities (other than those to be sold by the Company) are first entirely
excluded from the underwriting. No Registrable Securities or other securities
excluded from the underwriting by reason of this Section 7.2.2 shall be included
in such Registration Statement.

                    7.2.3  Withdrawal in Piggyback Registration.  If any Holder,
                           ------------------------------------
or a holder of other securities entitled (upon request) to be included in such
Registration, disapproves of the terms of any such underwriting, such Holder may
elect to withdraw therefrom by written notice to the Company and the underwriter
delivered at least seven (7) days prior to the effective date of the
Registration Statement. Any Registrable Securities or other securities excluded
or withdrawn from such underwriting shall be withdrawn from such Registration.

          7.3  Blue Sky in Piggyback Registration.  In the event of any
               ----------------------------------
Registration of Registrable Securities pursuant to Section 7, the Company will
exercise its best efforts to Register and qualify the securities covered by the
Registration Statement under such other securities or Blue Sky laws of such
jurisdictions as the Holders shall reasonably request and as shall be reasonably
appropriate for the distribution of such securities; provided, however, that the
Company shall not be required to qualify to do business or to file a general
consent to service of process in any such states or jurisdictions.

     8.   Expenses of Registration.
          ------------------------

                                       8
<PAGE>

          All Registration Expenses incurred in connection with two
Registrations pursuant to Section 6.1, up to four Registrations on Form S-3
pursuant to Section 6.3, and all Registrations pursuant to Section 7 shall be
borne by the Company. All Registration Expenses incurred in connection with any
other registration, qualification or compliance shall be apportioned among the
Holders and other holders of the securities so registered on the basis of the
number of shares so registered. Notwithstanding the above, the Company shall not
be required to pay for any expenses of Holders in connection with any
registration proceeding begun pursuant to Section 6.1 if the registration
request is subsequently withdrawn at the request of the Holders of a majority of
the Registrable Securities to be registered which Holders shall bear such
expenses), unless the Holders of a majority of the Registrable Securities agree
to forfeit their right to one demand registration pursuant to Section 6.1;
provided further, however, that (i) if at the time of such withdrawal, the
Holders have learned of a Material Adverse Event with respect to the condition,
business or prospects of the Company not known to the Holders at the time of
their request or (ii) such withdrawal is made after a deferral of such
registration by the Company pursuant to Section 6.2, then the Holders shall not
be required to pay any of such expenses and shall retain their rights pursuant
to Section 6.1. All Selling Expenses shall be borne by the holders of the
securities registered pro rata on the basis of the number of shares registered.

     9.   Registration Procedures.
          -----------------------

          The Company will keep each Holder whose Registrable Securities are
included in any registration pursuant to this Agreement advised as to the
initiation and completion of such Registration. At its expense the Company will:
(a) use its best efforts to keep such Registration effective for a period of 180
days or until the Holder or Holders have completed the distribution described in
the Registration Statement relating thereto, whichever first occurs; (b) furnish
such number of prospectuses (including preliminary prospectuses) and other
documents as a Holder from time to time may reasonably request; (c) prepare and
file with the SEC such amendments and supplements to such registration statement
and the prospectus used in connection with such registration statement as may be
necessary to comply with the provisions of the Securities Act with respect to
the disposition of all securities covered by such registration statement; and
(d) notify each Holder of Registrable Securities covered by such Registration
Statement at any time when a prospectus relating thereto is required to be
delivered under the Securities Act of the happening of any event as a result of
which the prospectus included in such Registration Statement, as then in effect,
includes an untrue statement of a material fact or omits to state a material
fact required to be stated therein or necessary to make the statements therein
not misleading in the light of the circumstances then existing.

     10.  Information Furnished by Holder.
          -------------------------------

          It shall be a condition precedent of the Company's obligations under
this Agreement that each Holder of Registrable Securities included in any
Registration furnish to the Company such information regarding such Holder and
the distribution proposed by such Holder or Holders as the Company may
reasonably request.

     11.  Indemnification.
          ---------------

                                       9
<PAGE>

          11.1  Company's Indemnification of Holders.  To the extent permitted
                ------------------------------------
by law, the Company will indemnify each Holder, each of its officers, directors
and constituent partners, legal counsel for the Holders, and each person
controlling such Holder, with respect to which Registration, qualification or
compliance of Registrable Securities has been effected pursuant to this
Agreement, and each underwriter, if any, and each person who controls any
underwriter against all claims, losses, damages or liabilities (or actions in
respect thereof) to the extent such claims, losses, damages or liabilities arise
out of or are based upon any untrue statement (or alleged untrue statement) of a
material fact contained in any prospectus or other document (including any
related Registration Statement) incident to any such Registration, qualification
or compliance, or are based on any omission (or alleged omission) to state
therein a material fact required to be stated therein or necessary to make the
statements therein not misleading, or any violation by the Company of the
Securities Act, the Securities Exchange Act of 1934, as amended (the "1934
Act"), or any state securities law, or any rule or regulation promulgated under
the Securities Act, the 1934 Act or any state securities law, applicable to the
Company and relating to action or inaction required of the Company in connection
with any such Registration, qualification or compliance; and the Company will
reimburse each such Holder, each of its officers, directors and constituent
partners, and legal counsel, each such underwriter, and each person who controls
any such Holder or underwriter, for any legal and any other expenses reasonably
incurred, as incurred, in connection with investigating or defending any such
claim, loss, damage, liability or action; provided, however, that the indemnity
contained in this Section 11.1 shall not apply to amounts paid in settlement of
any such claim, loss, damage, liability or action if settlement is effected
without the consent of the Company (which consent shall not unreasonably be
withheld); and provided, further, that the Company will not be liable in any
such case to the extent that any such claim, loss, damage, liability or expense
arises out of or is based upon any untrue statement or omission based upon
written information furnished to the Company by such Holder, its officers,
directors, constituent partners, or legal counsel, underwriter, or controlling
person and stated to be for use in connection with the offering of securities of
the Company.

          11.2  Holder's Indemnification of Company.  To the extent permitted by
                -----------------------------------
law, each Holder will, if Registrable Securities held by such Holder are
included in the securities as to which such Registration, qualification or
compliance is being effected pursuant to this Agreement, indemnify the Company,
each of its directors and officers, each legal counsel and independent
accountant of the Company, each underwriter, if any, of the Company's securities
covered by such a Registration Statement, each person who controls the Company
or such underwriter within the meaning of the Securities Act, and each other
such Holder, each of its officers, directors and constituent partners and each
person controlling such other Holder, against all claims, losses, damages and
liabilities (or actions in respect thereof) arising out of or based upon any
untrue statement (or alleged untrue statement) of a material fact contained in
any such Registration Statement, prospectus, offering circular or other document
(including any related Registration Statement) incident to any such
Registration, qualification or compliance, or any omission (or alleged omission)
to state therein a material fact required to be stated therein or necessary to
make the statements therein not misleading, or any violation by such Holder of
the Securities Act, the 1934 Act or any state securities law, or any rule or
regulation promulgated under the Securities Act, the 1934 Act or any state
securities law, applicable to such Holder and relating to action or inaction
required of such Holder in connection with any such Registration, qualification
or compliance; and will reimburse the Company, such Holders, such directors,

                                       10
<PAGE>

officers, partners, persons, law and accounting firms, underwriters or control
persons for any legal and any other expenses reasonably incurred, as incurred,
in connection with investigating or defending any such claim, loss, damage,
liability or action, in each case to the extent, but only to the extent, that
such untrue statement (or alleged untrue statement) or omission (or alleged
omission) is made in such Registration Statement, prospectus, offering circular
or other document in reliance upon and in conformity with written information
furnished to the Company by such Holder and stated to be specifically for use in
connection with the offering of securities of the Company, provided, however,
that each Holders liability under this Section 11.2 shall not exceed such
Holder's proceeds from the offering of securities made in connection with such
Registration; and provided, further, that the indemnity contained in this
Section 11.2 shall not apply to amounts paid in settlement of any such claim,
loss, damage, liability or action if settlement is effected without the consent
of the Holder (which consent shall not unreasonably be withheld).

          11.3  Indemnification Procedure.  Promptly after receipt by an
                -------------------------
indemnified party under this Section 11 of notice of the commencement of any
action, such indemnified party will, if a claim in respect thereof is to be made
against an indemnifying party under this Section 11, notify the indemnifying
party in writing of the commencement thereof and generally summarize such
action. The indemnifying party shall have the right to participate in and to
assume the defense of such claim, jointly with any other indemnifying party
similarly noticed; provided, however, that the indemnifying party shall be
entitled to select counsel for the defense of such claim with the approval of
any parties entitled to indemnification, which approval shall not be
unreasonably withheld; provided further, however, that if either party
reasonably determines that there may be a conflict between the position of the
Company and the Investors in conducting the defense of such action, suit or
proceeding by reason of recognized claims for indemnity under this Section 11,
then counsel for such party shall be entitled to conduct the defense to the
extent reasonably determined by such counsel to be necessary to protect the
interest of such party. The failure to notify an indemnifying party promptly of
the commencement of any such action, if prejudicial to the ability of the
indemnifying party to defend such action, shall relieve such indemnifying party,
to the extent so prejudiced, of any liability to the indemnified party under
this Section 11, but the omission so to notify the indemnifying party will not
relieve such party of any liability that such party may have to any indemnified
party otherwise other than under this Section 11.

     12.  Limitations on Registration Rights Granted to Other Securities.
          --------------------------------------------------------------

          From and after the date of this Agreement, the Company shall not enter
into any agreement with any holder or prospective holder of any securities of
the Company providing for the granting to such holder of any Registration rights
unless such rights are subordinate to the Registration rights set forth herein,
except that, with the consent of the Holders of fifty percent (50%) of the
aggregate of the Convertible Securities and Registrable Securities then
outstanding, additional holders may be added as parties to this Agreement with
regard to any or all securities of the Company held by them. Any such additional
parties shall execute a counterpart of this Agreement, and upon execution by
such additional parties and by the Company, shall be considered an Investor for
all purposes of this Agreement. The additional parties and the additional
Registrable Securities shall be identified in an amendment to Schedule A hereto.

                                       11
<PAGE>

     13.  Reports Under Securities Exchange Act of 1934.
          ---------------------------------------------

          With a view to making available to the investors the benefits of Rule
144 and any other rule or regulation of the Commission that may at any time
permit an investor to sell securities of the Company to the public without
Registration or pursuant to a Registration on Form S-3, the Company agrees to:

               (a)  make and keep public information available, as those terms
are defined in Rule 144, at all times after ninety (90) days after the effective
date of the first registration statement filed by the Company for the offering
of its securities to the general public;

               (b)  file with the Commission in a timely manner all reports and
other documents required of the Company under the Securities Act and the 1934
Act; and

               (c)  furnish to any Investor, so long as such Investor owns any
Convertible Securities or Registrable Securities, forthwith upon request (i) a
written statement by the Company that it has complied with the resorting
requirements of Rule 144 at any time after ninety (90) days after the effective
date of the first registration statement filed by the Company), the Securities
Act and the 1934 Act (at any time after it has become subject to such reporting
requirements), or that it qualifies as a registrant whose securities may be
resold pursuant to Form S-3 (at any time after it so qualifies), (ii) a copy of
the most recent annual or quarterly report of the Company and such other reports
and documents so filed by the Company, and (iii) such other information as may
be reasonably requested in availing any Investor of any rule or regulation of
the Commission which permits the selling of any such securities without
registration.

     14.  Market Stand-off.
          ----------------

          Each Holder hereby agrees that, if so requested by the Company and the
Underwriter's Representative (if any), such Holder shall not sell or otherwise
transfer (other than to donees who agree to be similarly bound) any Registrable
Securities or other securities of the Company during the 180-day period
following the effective date of a Registration Statement of the Company filed
under the Securities Act; provided that such restriction shall only apply to the
first two Registration Statements of the Company to become effective which
include securities to be sold on behalf of the Company to the public in an
underwritten offering; and provided, further, that all officers and directors of
the Company and all other persons with registration rights (whether or not
pursuant to this Agreement) enter into similar agreements.

     15.  Conversion of Preferred Stock.
          -----------------------------

          The Registration rights of the Holders of the Shares set forth in this
Agreement are conditioned upon the conversion of the Shares with respect to
which registration is sought into Common Stock prior to the effective date of
the Registration Statement.

     16.  Termination of Registration Rights.
          ----------------------------------

          The right to cause the Company to Register securities granted by the
Company to the Investors under the Agreement shall terminate five years after
the date of the closing of the Company's initial public offering of its
securities.

                                       12
<PAGE>

     17.  Transfer of Rights.
          ------------------

          The rights to information under Sections 2 and 3, the right of first
refusal set forth in Section 4 and the Registration rights of the Investors set
forth in Sections 6, 7, 8 and 9 may be assigned by any Holder to a transferee or
assignee of any Convertible Securities or Registrable Securities not sold to the
public acquiring at least 500,000 shares of such Holder's Convertible Securities
or Registrable Securities (equitably adjusted, for any recapitalizations, stock
splits, combinations, and the like) or acquiring all of the Convertible
securities and Registrable Securities held by such Holder if transferred to a
single entity; provided, however, that (i) the Company must receive written
notice prior to the time of said transfer, stating the name and address of said
transferee or assignee and identifying the securities with respect to which such
information and Registration rights are being assigned, and (ii) the transferee
or assignee of such rights must not be a person deemed by the Board of Directors
of the Company to be a competitor or potential competitor of the Company.
Notwithstanding the limitation set forth in the foregoing sentence respecting
the minimum number of shares which must be transferred, any Holder which is a
partnership may transfer such Holder's Registration rights to such Holder's
constituent partners (or may transfer to their heirs in the. case of
individuals) without restriction as to the number or percentage of shares
acquired by any such constituent partner (or heirs).

     18.  Miscellaneous.
          -------------

          18.1  Entire Agreement; Successors and Assigns.  This Agreement
                ----------------------------------------
constitutes the entire contract between the Company, the Investors and the
Founders relative to the subject matter hereof. Any previous agreement between
the Company and the Investors or the Founders concerning information rights,
rights of first refusal or Registration rights is superseded by this Agreement.
Subject to the exceptions specifically set forth in this Agreement, the terms
and conditions of this Agreement shall inure to the benefit of and be binding
upon the respective executors, administrators, heirs, successors and assigns of
the parties.

          18.2  Governing Law.  This Agreement shall be governed by and
                -------------
construed in accordance with the laws of the State of California applicable to
contracts entered into and wholly to be performed within the State of California
by California residents.

          18.3  Counterparts.  This Agreement may be executed in two or more
                ------------
counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument.

          18.4  Headings.  The headings of the Sections of this Agreement are
                --------
for convenience and shall not by themselves determine the interpretation of this
Agreement.

          18.5  Notices.  Any notice required or permitted hereunder shall be
                -------
given in writing and shall be conclusively deemed effectively given upon
personal delivery, or five (5) days after deposit in, the United States mail, by
first class mail, postage prepaid, or upon sending if sent by commercial
overnight deliver, service addressed (i) if to the Company, as set forth below
the Company's name on the signature page of this Agreement, and (ii) if to an
Investor or a Founder, at such Investor's or Founder's address as set forth on
the attached Schedule A or B,

                                       13
<PAGE>

or at such other address as the Company or such Investor or Founder may
designate by ten (10) days' advance written notice to the Investors and Founders
or to the Company, respectively.

          18.6  Amendment of Agreement.  Except as otherwise specifically
                ----------------------
provided herein, any provision of this Agreement :nay be amended by a written
instrument signed by the Company and by persons holding more than fifty percent
(50%) of the then outstanding Convertible Securities and Registrable Securities
(calculated on an as-converted basis); provided, that no amendment to Section
1(d) or Section 7.2.2 which adversely affects the rights of the holders of
Founders' Stock shall be enforceable against the holders of Founders' Stock
unless approved by persons holding more than fifty percent (50%) of the
Founders' Stock.

          18.7  Aggregation of Stock.  All Convertible Securities and
                --------------------
Registrable Securities held or acquired by affiliated entities or persons shall
be aggregated together for the purpose of determining the availability of any
rights under this Agreement.

          18.8  Severability.  If any provision of this Agreement is held to be
unenforceable for any reason, it shall be adjusted rather than voided, if
possible, in order to achieve the intent of the parties to the extent possible.
In any event, all other provisions of this Agreement shall be deemed valid and
enforceable to the full extent possible.

                                       14
<PAGE>

          IN WITNESS WHEREOF, the parties hereto have executed this Agreement as
of the day and year first above written.

          THE COMPANY:                 NEUROCRINE BIOSCIENCES, INC.

                                       By:______________________________________
                                       Title:___________________________________
                                       Address: 1020 Prospect Street
                                                Suite 405
                                                La Jolla, California 92037
                                                Attn: President

          THE INVESTORS:               D. BLECH & COMPANY, INC.

                                       By:______________________________________
                                       Title:___________________________________

                                       AVALON MEDICAL PARTNERS, L.P.

                                       By:______________________________________
                                          General Partner

                                       KLEINER PERKINS CAULFIELD &
                                          BYERS VI
                                       By: Kleiner Perkins Caulfield & Byers VI
                                           Associates

                                       By:______________________________________
                                          General Partner

                                       15
<PAGE>

                                       KLEINER PERKINS CAULFIELD & BYERS
                                       FOUNDERS VI

                                       By: Kleiner Perkins Caulfield & Byers VI
                                           Associates

                                       By:______________________________________
                                          General Partner

                                       _________________________________________
                                       DAVID SCHNELL

                                       _________________________________________
                                       DR. LAWRENCE STEINMAN

                                       VALE PARTNERS

                                       By:______________________________________
                                          General Partner

                                       THE HIXSON FAMILY TRUST, DATED
                                       AUGUST 25, 1986, HARRY F. HIXSON, JR.
                                       AND GEORGIANA B. HIXSON, TRUSTEES

                                       By:______________________________________
                                          Harry F. Hixon, Jr., Trustee

                                       16
<PAGE>

          THE FOUNDERS:

                                       _________________________________________
                                       DR. WYLIE W. VALE

                                       _________________________________________
                                       ERROL B. DE SOUZA

                                       _________________________________________
                                       DAVID BLECH

                                       _________________________________________
                                       MARK GERMAIN

                                       17
<PAGE>

                                  SCHEDULE A
                                  ----------

Frontier Charitable Remainder Trust
c/o Nicholas Madonia
30 Outwater Lane
Garfield, New Jersey 07026

Avalon Medical Partners, L.P.
1020 Prospect Street, Suite 405
La Jolla, California 92037
Attn: Mr. Lawrence A. Bock

Kleiner Perkins Caufield & Byers VI
Kleiner Perkins Caufield & Byers VI Founders Fund
2200 Geng Road, Suite 205
Two Embarcadero Place
Palo Alto, California 94303
Attn: Mr. Brook H. Byers

The Hixson Family Trust, dated August 25, 1986
Harry F. Hixson, Jr. and
Georgiana B. Hixson, Trustees
8518 Ruette Monte Carlo
La Jolla, California 92037

David Schnell
1020 Prospect Street
Suite 405
La Jolla, California 92037

Dr. Lawrence Steinman
Professor of Neurology
Department of Neurology
Stanford University Medical Center
Stanford, California 94305-5235

Vale Partners
c/o Dr. Wylie W. Vale
Professor and Head
Clayton Foundation Laboratories
for Peptide Biology
The Salk Institute
10010 N. Torrey Pines Road
La Jolla, California 92037-1099

Howard Birndorf
9360 Towne Center Drive
Suite 110B
San Diego, California 92121
<PAGE>

                                  SCHEDULE B
                                  ----------

Dr. Wylie W. Vale
Professor and Head
Clayton Foundation Laboratories
for Peptide Biology
The Salk Institute
10010 N. Torrey Pine Road
La Jolla, California 92037-1099

Errol B. de Souza
21 Montbard Drive
Chadds Ford, Pennsylvania 19317

David Blech
599 Lexington Avenue
Forty-First Floor
New York, New York 10022

Mark Germain
c/o D. Blech & Company Inc.
599 Lexington Avenue
Forty-First Floor
New York, New York 10022
<PAGE>

                                FIRST AMENDMENT
                                ---------------

     This Amendment dated as of December 5, 1992 is made between Neurocrine
Biosciences, Inc., a California corporation (the "Company"), and the persons
identified in Exhibit A hereto (collectively referred to as the "Investors").

                                   RECITALS

     1.   The Company and the Investors have entered into a Series A Preferred
Stock Purchase Agreement dated as of September 25, 1992 (the "Purchase
Agreement") providing for the sale of Series A Preferred Stock of the Company
(the "Series A Preferred") to the Investors, as provided in the Purchase
Agreement.

     2.   The Company and the Investors have entered into an Information and
Registration Rights Agreement dated September 25, 1992 (the "Information and
Registration Rights Agreement"), granting the Investors certain information,
registration and other rights (the "Rights") in connection with their purchase
of shares of Series A Preferred pursuant to the Purchase Agreement.

     3.   The Company and the Investors now wish to amend the Purchase Agreement
to provide for the sale of an additional 166,666 and 666,667 shares of Series A
Preferred (the "Additional Shares") to Schroder Ventures U.S. Trust and Schroder
Ventures Limited Partnership, respectively, (hereinafter referred to as
"Schroder").

     4.   The Company and the Investors now wish to amend the Information and
Registration Rights Agreement to provide Schroder with the same Rights as the
Investors.

     NOW, THEREFORE, the parties agree as follows:

     1.   The Company and the Investors holding more than fifty percent (50%) of
the outstanding shares of Series A Preferred purchased by all Investors hereby
agree, pursuant to Section 10.7 of the Purchase Agreement, that the Purchase
Agreement is hereby amended to provide that the Company shall have the right to
sell the Additional Shares of Series A Preferred to Schroder at the price and on
the terms set forth in the Purchase Agreement. Schroder shall be considered an
"Investor" and such Additional Shares of Series A Preferred shall be considered
part of the "Shares" for purposes of the Purchase Agreement.

     2.   The Company and the Investors holding more than fifty percent (50%) of
the outstanding shares of Series A Preferred hereby agree, pursuant to Section
18.6 of the Information and Registration Rights Agreement, that the Information
and Registration Rights Agreement is hereby amended to add Schroder as a
signatory in connection with Schroder's purchase of shares of the Series A
Preferred pursuant to the Purchase Agreement, as hereby amended. Schroder shall
be considered an "Investor" and "Holder," and shall have the same Rights as the
Investors under the Information and Registration Rights Agreement. The
Additional Shares shall be considered part of the Series A Preferred Stock under
the Information and Registration Rights Agreement.

<PAGE>

     3.   Except as provided herein, the Purchase Agreement and the Information
and Registration Rights Agreement shall continue in full force and effect.

     4.   This Amendment may be executed in any number of counterparts, each of
which may be executed by less than all of the Investors, each of which shall be
enforceable against the parties actually executing such counterparts, and all of
which together shall constitute one instrument.

     This Amendment is hereby executed as of the date first above written.

                             "COMPANY"

                             NEUROCRINE BIOSCIENCES, INC.,
                             a California Corporation

                             By:______________________________________
                             Title:___________________________________

                             "INVESTORS"

                             FRONTIER CHARITABLE REMAINDER TRUST

                             By:______________________________________
                             Name:
                             Title:

                             AVALON MEDICAL PARTNERS, L.P.

                             By:______________________________________
                                          General Partner

                             KLEINER PERKINS CAUFIELD & BYERS VI
                             By:  Kleiner Perkins Caufield & Byers VI Associates

                                    By:______________________________________
                                                  General Partner

                             KLEINER PERKINS CAUFIELD & BYERS VI
                             FOUNDERS FUND
                             By:  Kleiner Perkins Caufield & Byers VI Associates

                                    By:______________________________________
                                                  General Partner

                                       2
<PAGE>

                                       _______________________________________
                                       David Schnell

                                       _______________________________________
                                       Dr. Lawrence Steinman

                                       VALE PARTNERS

                                       By:____________________________________
                                                     General Partner

                                       THE HIXSON FAMILY TRUST, DATED
                                       AUGUST 25, 1986, HARRY F. HIXSON, JR. AND
                                       GEORGIANNA B. HIXSON, TRUSTEES

                                       By:_____________________________________
                                               Harry F. Hixson, Jr., Trustee

                                       _______________________________________
                                                     HOWARD BIRNDORF

                                       3

<PAGE>

                                THIRD AMENDMENT
                                ---------------

     This Amendment dated as of March 15, 1993 is made between Neurocrine
Biosciences, Inc., a California corporation (the "Company"), and the persons
identified in Exhibit A hereto (collectively referred to as the "Investors").

                                   RECITALS

     5.   The Company and the Investors have entered into a Series A Preferred
Stock Purchase Agreement dated as of September 25, 1992, amended as of December
5, 1992 and January 8, 1993 (the "Purchase Agreement") providing for the sale of
Series A Preferred Stock of the Company (Series A Preferred") to the Investors,
as provided in the Purchase Agreement.

     6.   The Company and the Investors have entered into an Information and
Registration Rights Agreement dated September 25, 1992, amended as of December
5, 1992 and January 8, 1993 (the "Information and Registration Rights
Agreement"), granting the Investors certain information, registration and other
rights (the "Rights") in connection with their purchase of shares of Series A
Preferred pursuant to the Purchase Agreement.

     7.   The Company and the Investors now wish to amend the Purchase Agreement
to provide for the sale of an additional 50,000 shares of 250,000 shares of
Series A Preferred (the "Additional Shares") to Kevin C. Gorman and Gary A.
Lyons, respectively, (hereinafter referred to as the "Purchasers").

     8.   The Company and the Investors now wish to amend the Information and
Registration Rights Agreement to provide the Purchasers with the same Rights as
the Investors.

     NOW, THEREFORE, the parties agree as follows:

     5.   The Company and the Investors holding more than fifty percent (50%) of
the outstanding shares of Series A Preferred hereby agree, pursuant to Section
10.7 of the Purchase Agreement, that the Purchase Agreement is hereby amended to
provide that the Company shall have the right to sell the Additional Shares of
Series A Preferred to the Purchasers at the price and on the terms set forth in
the Purchase Agreement, with such modifications to such terms as are set forth
in Paragraph 2 below. The Purchasers shall be considered an "Investor" and such
Additional Shares of Series A Preferred shall be considered part of the "Shares"
for purposes of the Purchase Agreement.

     6.   The Purchasers shall pay the purchase price for the Shares to be sold
to them as follows: one half in case and one-half by execution of an interest-
bearing promissory note payable to the Company amortized over a five-year
period.

     7.   The Company and the Investors holding more than fifty percent (50%) of
the outstanding shares of Series A Preferred hereby agree, pursuant to Section
18.6 of the Information and Registration Rights Agreement, that the Information
and Registration Rights Agreement is hereby amended to add the Purchasers as a
signatory in connection with the
<PAGE>

Purchasers' purchase of shares of the Series A Preferred pursuant to the
Purchase Agreement, as hereby amended. Each Purchaser shall be considered an
"Investor" and "Holder," and shall have the same Rights as the Investors under
the Information and Registration Rights Agreement. The Additional Shares shall
be considered part of the Series A Preferred Stock under the Information and
Registration Rights Agreement.

     8.   Except as provided herein, the Purchase Agreement and the Information
and Registration Rights Agreement shall continue in full force and effect.

     9.   This Amendment may be executed in any number of counterparts, each of
which may be executed by less than all of the Investors, each of which shall be
enforceable against the parties actually executing such counterparts, and all of
which together shall constitute one instrument.

     This Amendment is hereby executed as of the date first above written.

                                   "COMPANY"

                                   NEUROCRINE BIOSCIENCES, INC.,
                                   a California Corporation

                                   By:_______________________________________

                                   Title:____________________________________

                                   "INVESTORS"

                                   AVALON MEDICAL PARTNERS, L.P.

                                   By:_______________________________________
                                                   General Partner

                                   __________________________________________
                                   Howard C. Birndorf

                                   __________________________________________
                                   Anna Hung De Souza

                                   __________________________________________
                                   Errol B. De Souza

                                       2

<PAGE>

                             FRONTIER CHARITABLE REMAINDER TRUST

                             By:_______________________________________

                             Title:____________________________________

                             THE HIXSON FAMILY TRUST, DATED
                             AUGUST 25, 1986, HARRY F. HIXSON, JR. AND
                             GEORGIANNA B. HIXSON, TRUSTEES

                             By:_______________________________________
                                    Harry F. Hixson, Jr., Trustee

                             KLEINER PERKINS CAUFIELD & BYERS VI

                             By:  Kleiner Perkins Caufield & Byers VI Associates

                                     By:_______________________________
                                                General Partner

                             KLEINER PERKINS CAUFIELD & BYERS VI
                             FOUNDERS FUND

                             By:  Kleiner Perkins Caufield & Byers VI Associates

                                     By:_______________________________
                                                General Partner

                             __________________________________________
                             David Schnell

                             __________________________________________
                             Lawrence Steinman

                             VALE PARTNERS

                             By:_______________________________________
                                           General Partner

                                       3

<PAGE>

                               FOURTH AMENDMENT

          This Amendment is made effective as of January 24, 1995 between
Neurocrine Biosciences, Inc. (the "Company") and the undersigned holders (the
"Holders") of Common Stock of the Company who are parties to, or have been
assigned rights under, the Company's Information and Registration Rights
Agreement dated September 25, 1992 attached hereto as Exhibit A (the "Rights
Agreement") with regard to the issuance by the Company of up to a total of
782,005 shares of the Company's Common Stock (the "Shares") to Johnson & Johnson
Development Corporation ("Johnson"). The Company and the Holders agree as
follows:

      1.  The Holders hereby waive the right of first refusal granted to such
  Holders pursuant to the Rights Agreement and any other similar rights they may
  have to purchase any of the Shares or to receive notice of the proposed sale
  of the Shares from the Company.

      2.  The Holders hereby consent to the inclusion of (i) Johnson as a party
  to the Rights Agreement, and (ii) the Shares as "Registrable Securities" as
  defined in Section 1(i) of the Rights Agreement. The Rights Agreement is
  hereby amended to include Johnson as a "Holder" thereunder and to include the
  Shares in the definition of "Registrable Securities" thereunder.

      3.  Section 2 of the Rights Agreement is hereby amended and restated to
  read as set forth below:

               2.   Information Rights.
                    ------------------

               2.1. Financial Information. The Company will provide the
                    ---------------------
    Investors the following reports for so long as the Investor is a holder of a
    minimum of 100,000 shares of Common Stock (as adjusted for
    recapitalizations, stock splits, stock dividends, and the like):

                    (a)  As soon as practicable after the end of each fiscal
    year, and in any event within one hundred twenty (120) days thereafter,
    consolidated balance sheets of the Company and its subsidiaries, if any, as
    of the end of such fiscal year, and consolidated statements of income,
    stockholders' equity and cash flows of the Company and its subsidiaries, if
    any, for such year, prepared in accordance with generally accepted
    accounting principles and setting forth in each case in comparative form the
    figures for the previous fiscal year, all in reasonable detail and audited
    by independent auditors of national standing selected by the Company.

                    (b)  As soon as practicable after the end of each fiscal
    quarter and in any event within forty five (45) days thereafter, a
    consolidated balance sheet of the Company and its subsidiaries, if any, as
    of the end of each such quarter, and consolidated statements of income and
    cash flows of the Company and its subsidiaries for such quarter (set forth
    on a monthly basis) and for the current fiscal year to date, and setting
    forth in comparative form the budgeted figures for such quarter and for the
    current fiscal year to date then reported, prepared in accordance with
    generally accepted accounting principles (other than for accompanying notes
    and subject to changes resulting from year-end audit adjustments)."
<PAGE>

          This Amendment shall be effective with regard to all Holders upon
execution by the Company and the Holders who hold more than fifty percent (50%)
of the outstanding Registrable Securities as provided in Section 18.6 of the
Rights Agreement. This Amendment may be executed in one or more counterparts,
each of which shall be deemed an original, and all of which together shall
constitute one instrument.

THE COMPANY:

                      NEUROCRINE BIOSCIENCES, INC.

                      By:_______________________________________________

                      Title:____________________________________________

HOLDERS:

                      ABINGWORTH BIOVENTURES

                      By:_______________________________________________

                      Title:____________________________________________

                      AVALON MEDICAL PARTNERS, L.P.

                      By:_______________________________________________
                                        General Partner

                      __________________________________________________
                      HOWARD BIRNDORF

                      __________________________________________________
                      ERROL B. DE SOUZA

                      __________________________________________________
                      MARK S. GERMAIN

                      THE HIXSON FAMILY TRUST, DATED
                      AUGUST 25, 1986, HARRY F. HIXSON, JR.
                      AND GEORGIANA B. HIXSON, TRUSTEES

                      By:_______________________________________________
                               Harry F. Hixson, Jr., Trustee

                                       2

<PAGE>

                      KLEINER PERKINS CAUFIELD & BYERS VI

                      By:  Kleiner Perkins Caufield & Byers VI Associates

                           By:__________________________________________
                                         General Partner

                      KLEINER PERKINS CAUFIELD & BYERS
                      VI FOUNDERS FUND
                      By:  Kleiner Perkins Caufield & Byers VI Associates

                           By:__________________________________________
                                         General Partner

                      __________________________________________________
                      DAVID SCHNELL

                      SCHRODER VENTURES LIMITED PARTNERSHIP

                      By:_______________________________________________

                      Title:____________________________________________

                      SCHRODERS INCORPORATED

                      By:_______________________________________________

                      Title:____________________________________________

                      SCHRODER VENTURE U.S. TRUST

                      By:_______________________________________________

                      Title:____________________________________________

                      __________________________________________________
                      DR. LAWRENCE STEINMAN

                      VALE PARTNERS

                      __________________________________________________
                                        General Partner

                      __________________________________________________
                      DR. WYLIE W. VALE

                                       3

<PAGE>

                                FIFTH AMENDMENT

          This Amendment is made effective as of February 22, 1995 between
Neurocrine Biosciences, Inc. (the "Company") and the undersigned holders (the
"Holders") of Common Stock of the Company who are parties to, or have been
assigned rights under, the Company's Information and Registration Rights
Agreement dated September 25, 1992 (as amended on January 24, 1995) attached
hereto as Exhibit A (the "Rights Agreement") with regard to the issuance by the
Company of up to a total of approximately 215,000 shares of the Company's Common
Stock (the "Shares") to Neuroscience Partners Limited Partnership ("MDS"). The
Company and the Holders agree as follows:

      4.  The Holders hereby consent to the changes made to the previously
  executed Amendment between the Holder and the Company dated January 24, 1995.
  The revised Amendment dated January 24, 1995 is attached hereto as Exhibit B.

      5.  The Holders hereby consent to the inclusion of (i) MDS as a party to
  the Rights Agreement, and (ii) the Shares as "Registrable Securities" as
  defined in Section 1(i) of the Rights Agreement. The Rights Agreement is
  hereby amended to include MDS as a "Holder" and an "Investor" for the purposes
  of Sections 6 through 18 thereunder and to include the Shares in the
  definition of "Registrable Securities" thereunder.

          This Amendment shall be effective with regard to all Holders upon
execution by the Company and the Holders who hold more than fifty percent (50%)
of the outstanding Registrable Securities as provided in Section 18.6 of the
Rights Agreement. This Amendment may be executed in one or more counterparts,
each of which shall be deemed an original, and all of which together shall
constitute one instrument.

THE COMPANY:

                                             NEUROCRINE BIOSCIENCES, INC.

                                             By:_____________________________

                                             Title:__________________________
<PAGE>

MDS: By its signature below, MDS hereby agrees to become a party to the Rights
Agreement as a "Holder" and an "Investor" for the purposes of Sections 6 through
18 thereof and shall be entitled to all of the rights and subject to all of the
obligations of a "Holder" and an "Investor" for the purposes of Sections 6
through 18 of the Rights Agreement.

                                   NEUROSCIENCE PARTNERS LIMITED PARTNERSHIP

                                   By:____________________________________

                                   Title:_________________________________

HOLDERS:

                                   ABINGWORTH BIOVENTURES

                                   By:____________________________________

                                   Title:_________________________________

                                   AVALON MEDICAL PARTNERS, L.P.

                                   By:____________________________________
                                         General Partner

                                   _______________________________________
                                   HOWARD BIRNDORF

                                   _______________________________________
                                   ERROL B. DE SOUZA

                                   _______________________________________
                                   MARK S. GERMAIN

                                   THE HIXSON FAMILY TRUST, DATED
                                   AUGUST 25, 1986, HARRY F. HIXSON, JR.
                                   AND GEORGIANA B. HIXSON, TRUSTEES

                                   By:____________________________________
                                         Harry F. Hixson, Jr., Trustee

                                       2
<PAGE>

                                   JOHNSON & JOHNSON DEVELOPMENT CORPORATION

                                   By:____________________________________

                                   Title:_________________________________

                                   KLEINER PERKINS CAUFIELD & BYERS VI

                                   By: Kleiner Perkins Caufield & Byers VI
                                       Associates

                                       By:________________________________
                                              General Partner

                                   KLEINER PERKINS CAUFIELD & BYERS
                                   VI FOUNDERS FUND

                                   By: Kleiner Perkins Caufield & Byers VI
                                       Associates

                                       By:________________________________
                                              General Partner

                                   _______________________________________
                                   DAVID SCHNELL

                                   SCHRODER VENTURES LIMITED PARTNERSHIP

                                   By:____________________________________

                                   Title:_________________________________

                                   SCHRODERS INCORPORATED

                                   By:____________________________________

                                   Title:_________________________________

                                   SCHRODER VENTURE U.S. TRUST

                                   By:____________________________________

                                   Title:_________________________________

                                   _______________________________________
                                   DR. LAWRENCE STEINMAN

                                       3
<PAGE>

                                   VALE PARTNERS

                                   _______________________________________
                                              General Partner

                                   _______________________________________
                                   DR. WYLIE W. VALE

                                       4
<PAGE>

                                SIXTH AMENDMENT

          This Amendment is made effective as of January 19, 1996 between
Neurocrine Biosciences, Inc. (the "Company") and the undersigned holders (the
"Holders") of Common Stock of the Company who are parties to, or have been
assigned rights under, the Company's Information and Registration Rights
Agreement dated September 25, 1992 attached hereto as Exhibit A (the "Rights
Agreement") with regard to the issuance by the Company of up to a total of
645,162 shares of the Company's Common Stock (the "Shares") to Ciba Geigy
Limited ("Ciba"). The Company and the Holders agree as follows:

      6.  The Holders hereby waive the right of first refusal granted to such
  Holders pursuant to the Rights Agreement and any other similar rights they may
  have to purchase any of the Shares or to receive notice of the proposed sale
  of the Shares from the Company.

      7.  The Holders hereby consent to the inclusion of (i) Ciba as a party to
  the Rights Agreement, and (ii) the Shares as "Registrable Securities" as
  defined in Section 1(i) of the Rights Agreement. The Rights Agreement is
  hereby amended to include Ciba as a "Holder" thereunder and to include the
  Shares in the definition of "Registrable Securities" thereunder.

          This Amendment shall be effective with regard to all Holders upon
execution by the Company and the Holders who hold more than fifty percent (50%)
of the outstanding Registrable Securities as provided in Section 18.6 of the
Rights Agreement. This Amendment may be executed in one or more counterparts,
each of which shall be deemed an original, and all of which together shall
constitute one instrument.

THE COMPANY:

                                             NEUROCRINE BIOSCIENCES, INC.

                                             By:______________________________

                                             Title:___________________________
<PAGE>

HOLDERS:

                         ABINGWORTH BIOVENTURES

                         By:___________________________________

                         Title:________________________________

                         AVALON MEDICAL PARTNERS, L.P.

                         By:___________________________________
                               General Partner

                         ______________________________________
                         HOWARD BIRNDORF

                         ______________________________________
                         ERROL B. DE SOUZA

                         ______________________________________
                         MARK S. GERMAIN

                         THE HIXSON FAMILY TRUST, DATED
                         AUGUST 25, 1986, HARRY F. HIXSON, JR.
                         AND GEORGIANA B. HIXSON, TRUSTEES

                         By:___________________________________
                               Harry F. Hixson, Jr., Trustee

                         JOHNSON & JOHNSON DEVELOPMENT CORPORATION

                         By:___________________________________

                         Title:________________________________

                         KLEINER PERKINS CAUFIELD & BYERS VI

                         By: Kleiner Perkins Caufield & Byers VI Associates

                             By:_______________________________
                                    General Partner

                                       2
<PAGE>

                         KLEINER PERKINS CAUFIELD & BYERS VI FOUNDERS FUND

                         By: Kleiner Perkins Caufield & Byers VI Associates

                             By:_______________________________
                                    General Partner

                         ______________________________________
                         DAVID SCHNELL

                         SCHRODER VENTURES LIMITED PARTNERSHIP

                         By:___________________________________

                         Title:________________________________

                         SCHRODERS INCORPORATED

                         By:___________________________________

                         Title:________________________________

                         SCHRODER VENTURE U.S. TRUST

                         By:___________________________________

                         Title:________________________________

                         ______________________________________
                         DR. LAWRENCE STEINMAN

                         VALE PARTNERS

                         ______________________________________
                                    General Partner

                         ______________________________________
                         DR. WYLIE W. VALE

                                       3

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00018-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00018-of-00352.parquet"}]]