EXECUTION COPY



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                           Mentor Graphics Corporation


                                       and


                      American Stock, Transfer & Trust Co.

                                 as Rights Agent


                                Rights Agreement

                          Dated as of February 10, 1999



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

          Rights Agreement, dated as of February 10, 1999, between Mentor
Graphics Corporation, an Oregon corporation (the "Company"), and American Stock,
Transfer & Trust Co., a New York corporation, as Rights Agent (the "Rights
Agent").

                                    RECITALS

          WHEREAS, on February 10, 1999, the Board of Directors of the Company
adopted this Agreement, and authorized and declared a dividend of one incentive
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 March 5, 1999 (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), each Right initially representing the right to purchase one
one-hundredth (subject to adjustment) of a share of Series A Junior
Participating Incentive Stock (the "Incentive Shares") of the Company having the
rights, powers and preferences set forth in the form of Amendment of 1987
Restated Articles of Incorporation of Mentor Graphics Corporation 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:

          Section 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) if, as of the date hereof, any Person
is the Beneficial Owner of 15% or more of the Common Shares outstanding (an
"Existing Holder"), such Existing Holder shall not be or become an "Acquiring
Person" unless and until such time as such Existing Holder shall become the
Beneficial Owner of one or more additional Common Shares of the Company (other
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), unless, upon becoming the Beneficial Owner of
such additional Common Shares, such Existing Holder is not then the Beneficial
Owner of 15% or more of the Common Shares then outstanding. 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

                                       1

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 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,

                                       2

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 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.

                                       3

          1.5. "close of business" on any given date shall mean 5:00 p.m.,
pacific time, on such date; provided, however, that if such date is not a
Business Day it shall mean 5:00 p.m., pacific 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, no par value, of the Company. "Common Shares"
when 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 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
entity 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
          common stock equivalent                        11.1.3

                                       4

          Company                                        Recitals
          current per share market price                 11.4
          Current Value                                  11.1.3
          Distribution Date                              3.1
          equivalent incentive stock                     11.2
          Exchange Act                                   1.1
          Exchange Consideration                         27
          Existing Holder                                1.1
          Expiration Date                                7.1
          Final Expiration Date                          7.1
          Nasdaq                                         9
          Original Rights                                1.3
          Incentive 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

          Section 2. Appointment of Rights Agent. The Company hereby appoints
the Rights Agent to act as agent for the Company and the holders of the Rights
(who, in accordance with Section 3, shall prior to the Distribution Date also be
the holders of the Common Shares) 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. 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.

          Section 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) to commence, a tender or
exchange offer the consummation of which would result in any Person (other than
an Exempt Person) becoming the Beneficial Owner of Common Shares aggregating 15%
or more of the then outstanding Common Shares of the Company (the 

                                       5

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, except as a result of the operation
of the third sentence of Section 1.1. As soon as practicable after the
Distribution Date, the Company will prepare and execute, 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 Incentive 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 or transfer or exchange of outstanding Common Shares)
after 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 an Agreement between Mentor Graphics
     Corporation (the "Company") 

                                     6

     and American Stock, Transfer & Trust Co., as Rights Agent, dated as of
     February 10, 1999, 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.

          Section 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 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 an Incentive
Share as shall be set forth therein at the price per one one-hundredth of an
Incentive Share set forth therein (the "Purchase Price"), but the number of such
one one-hundredths of an Incentive Share and the Purchase Price shall be subject
to adjustment as provided herein.

          Section 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

                                       7

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, the Rights Agent will keep or cause
to be kept, at its principal office, 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.

          Section 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 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 an Incentive 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. Neither the Rights Agent nor the Company shall be
obligated to take any action whatsoever with respect to the transfer of any such
surrendered Right Certificate or Right Certificates until the registered holder
shall have 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.

          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 

                                       8

reasonably 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 reasonably 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.

          Section 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, together with payment of the aggregate Purchase Price for the
total number of one one-hundredths of an Incentive 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 February 10, 2009 (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 an
Incentive Share pursuant to the exercise of a Right shall be initially $95.00,
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.

          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 an Incentive Share to be
purchased and an amount equal to any applicable transfer tax 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 Incentive Shares (or make available, if the Rights Agent
is the transfer agent) certificates for the number of Incentive 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 Incentive 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 an Incentive Share as are to be purchased (in which case certificates for the
Incentive 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 appropriate, requisition from
the Company the amount of cash to be paid in lieu of the issuance of fractional
shares in accordance 

                                       9

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 appropriate, 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 appropriate.

          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.

          Section 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.

          Section 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 Incentive
Shares (and, following the occurrence of a Trigger Event, out of its authorized
and unissued Common Shares or other securities) the number of Incentive 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.

                                       10

          So long as the Incentive 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 Incentive 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
Incentive Shares upon the exercise of Rights, to register and qualify such
Incentive 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 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.
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 Federal and state transfer taxes and charges which may be
payable in respect of the issuance or delivery of the Right Certificates or of
any Incentive 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 transfer tax 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 Incentive 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 Incentive 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 shall have been paid
(any such tax 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 is due.

                                       11

          Section 10. Incentive Shares Record Date. Each person in whose name
any certificate for Incentive 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 Incentive 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 transfer taxes) was made; provided, however, that if the
date of such surrender and payment is a date upon which the Incentive 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 Incentive 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
Incentive Shares for which the Rights shall be exercisable, including, without
limitation, the right 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.

          Section 11. Adjustment of Purchase Price, Number of Shares or Number
of Rights. The Purchase Price, the number of Incentive 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.

          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 Incentive Shares payable in Incentive Shares, (B) subdivide the
outstanding Incentive Shares, (C) combine the outstanding Incentive Shares into
a smaller number of Incentive Shares or (D) issue any shares of its capital
stock in a reclassification of the Incentive 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 Incentive
Shares transfer books of the Company were open, he would have owned upon such
exercise and been entitled to receive by virtue of such dividend, subdivision,
combination or reclassification. 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 occurrence of such event, each holder of a Right, except as provided
below, shall thereafter have a right to receive, upon 

                                       12

exercise thereof at a price per Right equal to the then current Purchase Price
multiplied by the number of one one-hundredths of an Incentive 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 Incentive 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 an Incentive 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 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 a plan, arrangement or understanding which has as a
primary purpose or effect avoidance of this Section 11.1.2, and subsequent
transferees, shall become 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 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
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 Incentive Shares or fraction thereof such
that the current per share market price of one Incentive 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 

                                       13

Event there shall not be sufficient Common Shares authorized but unissued 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 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) Incentive Shares or
other equity securities of the Company (including, without limitation, shares,
or fractions of shares, of incentive 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 Common Shares) (each such share of incentive
stock or fractions of shares of incentive 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 Incentive 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 one 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 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. 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 

                                       14

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 Incentive
Shares entitling them (for a period expiring within 45 calendar days after such
record date) to subscribe for or purchase Incentive Shares (or securities having
the same rights, privileges and preferences as the Incentive Shares ("equivalent
incentive stock")) or securities convertible into Incentive Shares or equivalent
incentive stock at a price per Incentive Share or per share of equivalent
incentive stock (or having a conversion or exercise price per share, if a
security convertible into or exercisable for Incentive Shares or equivalent
incentive stock) less than the current per share market price of the Incentive
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 Incentive Shares
and shares of equivalent incentive stock outstanding on such record date plus
the number of Incentive Shares and shares of equivalent incentive stock which
the aggregate offering price of the total number of Incentive Shares and/or
shares of equivalent incentive 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 Incentive Shares and shares of equivalent incentive stock outstanding
on such record date plus the number of additional Incentive Shares and/or shares
of equivalent incentive stock to be offered for subscription or purchase (or
into which the convertible securities so to be offered are initially
convertible). 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 statement filed with
the Rights Agent and shall be binding on the Rights Agent and the holders of the
Rights. Incentive Shares and shares of equivalent incentive 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 Incentive 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

                                       15

Incentive 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 Incentive 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
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 Incentive Share and the
denominator of which shall be such current per share market price of the
Incentive Shares (as determined pursuant to Section 11.4). 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 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. If on any
such date no such market maker is making a market in the Security, the fair
value of the Security on such date as determined in good faith by the Board of
Directors of the Company shall be used. The term "Trading Day" shall mean a day
on which the principal national securities exchange on which the Security is
listed or admitted to 

                                       16

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

          11.4.2. Incentive Shares. Notwithstanding Section 11.4.1, for the
purpose of any computation hereunder, the "current per share market price" of
the Incentive 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 Incentive Shares cannot be determined in the manner
described in Section 11.4.1, the "current per share market price" of the
Incentive 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 Incentive Shares are publicly held or so
listed or traded, or if on any such date neither the Common Shares nor the
Incentive Shares are so quoted and no such market maker is making a market in
either the Common Shares or the Incentive Shares, "current per share market
price" of the Incentive 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 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 an
Incentive Share shall be equal to the "current per share market price" of one
Incentive 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 an
Incentive 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 Incentive 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 Incentive 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 Incentive Shares contained in Sections 11.1,
11.2, 11.3, 11.5, 11.8, 

                                       17

11.9 and 11.13, and the provisions of Sections 7, 9, 10, 13 and 14 with respect
to the Incentive 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 an Incentive 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 an Incentive Share (calculated to the nearest one-hundred
thousandth of an Incentive Share) obtained by (i) multiplying (x) the number of
one one-hundredths of an Incentive 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 an Incentive 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 an Incentive 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 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 

                                       18

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 an Incentive
Share issuable upon the exercise of the Rights, the Right Certificates
theretofore and thereafter issued may continue to express the Purchase Price per
share and the number of one one-hundredths of an Incentive Share which were
expressed in the initial Right Certificates issued hereunder.

          11.11. [Intentionally Blank]

          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 until the
occurrence of such event the issuance to the holder of any Right exercised after
such record date of that number of Incentive Shares and shares of other capital
stock or securities of the Company, if any, issuable upon such exercise over and
above the Incentive 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
Incentive Shares, issuance wholly for cash of any of the Incentive Shares at
less than the current market price, issuance wholly for cash of Incentive Shares
or securities which by their terms are convertible into or exchangeable for
Incentive Shares, dividends on Incentive Shares payable in Incentive Shares or
issuance of rights, options or warrants referred to hereinabove in this Section
11, hereafter made by the Company to holders of its Incentive 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
payment of dividends payable in Common Shares), or (iii) combine the outstanding
Common 

                                       19

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.

          Section 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 statement of the facts accounting for such adjustment, (b) promptly
file with the Rights Agent and with each transfer agent for the Common Shares or
the Incentive 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 protected in relying on any such certificate and on
any adjustment therein contained and shall not be deemed to have knowledge of
any such adjustment unless and until it shall have received such certificate.

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

          13.1. Certain Transactions. In the event that, from and after the
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) the Company shall engage in
a share exchange (as defined in Oregon Revised Statutes ss. 60.484) as a result
of which the holders of a majority of the outstanding Common Shares immediately
prior to such share exchange hold less than a majority of the outstanding Common
Shares immediately following such share exchange, (C) 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 (D) 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 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 an Incentive Share for which a Right was 

                                       20

exercisable immediately prior to the 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), in accordance with the terms of this Agreement and in lieu of Incentive
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 an Incentive Share for which a Right was exercisable
immediately prior to the 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, share exchange, 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, share
exchange, sale or transfer; (ii) such Principal Party shall thereafter be liable
for, and shall assume, by virtue of such consolidation, merger, share exchange,
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, share exchange, 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, share exchange,
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, share exchange, 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

                                       21

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 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 (D) of this Section 13.1 if (i) at the time of or immediately after
such consolidation, merger, share exchange, 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

                                       22

the benefits intended to be afforded by the Rights, (ii) prior to,
simultaneously with or immediately after such consolidation, merger, share
exchange, 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
(D) of this Section 13.1.

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

               (i) in the case of any transaction described in (A), (B) or (C)
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,
consolidation or share exchange, 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 or share exchange, 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 (D) 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
venturers, 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 

                                       23

described in clause (A), (B), (C) or (D) of Section 13.1 involving the Company
pursuant to a merger 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.

          Section 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 statement
filed with the Rights Agent and shall be conclusive for all purposes.

          14.2. Cash in Lieu of Fractional Incentive Shares. The Company shall
not be required to issue fractions of Incentive Shares (other than fractions
which are integral multiples of one one-hundredth of an Incentive Share) upon
exercise or exchange of the Rights or to distribute certificates which evidence
fractional Incentive Shares (other than fractions which are integral multiples
of one one-hundredth of an Incentive Share). Interests in fractions of Incentive
Shares in integral multiples of one one-hundredth of an Incentive 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 holders of such depositary
receipts shall have all the rights, privileges and 

                                       24

preferences to which they are entitled as beneficial owners of the Incentive
Shares represented by such depositary receipts. In lieu of fractional Incentive
Shares that are not integral multiples of one one-hundredth of an Incentive
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
Incentive 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.

          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, 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.

          Section 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;

                                       25

               (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

               (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.

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

          Section 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 administration and execution 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, or expense, incurred without negligence, bad faith
or willful misconduct on the part of the Rights Agent, for anything done or
omitted by the Rights Agent in connection with the acceptance and administration
of this Agreement, including the costs and expenses of defending against any
claim of liability arising therefrom, directly or indirectly.

          The Rights Agent shall be protected and shall incur no liability for
or in respect of any action taken, suffered or omitted by it in connection with
its administration of this Agreement in reliance upon any Right Certificate or
certificate for the Incentive 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.

          Section 19. Merger or Consolidation or Change of Name of Rights Agent.
Any corporation or limited liability company into which the Rights Agent or any
successor 

                                       26

Rights Agent may be merged or with which it may be consolidated, or any
corporation or limited liability company resulting from any merger or
consolidation to which the Rights Agent or any successor Rights Agent shall be a
party, or any corporation or limited liability company succeeding to the
corporate trust or stock transfer 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 corporation or limited liability
company 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, 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.

          Section 20. Duties of Rights Agent. The Rights Agent undertakes the
duties and obligations imposed by this Agreement 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 opinion of
such counsel shall be full and complete authorization and protection to the
Rights Agent as to any action taken or omitted by it in good faith and in
accordance with such 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 or suffering 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 to the Rights
Agent for any action taken or suffered in good faith by it under the provisions
of this Agreement in reliance upon such certificate.

                                       27

          20.3. Standard of Care. The Rights Agent shall be liable hereunder
only for its own negligence, bad faith or willful misconduct.

          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 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 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 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 be responsible for any change in the
exercisability of the Rights (including the Rights becoming 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 Incentive Shares or other
securities to be issued pursuant to this Agreement or any Right Certificate or
as to whether any Incentive 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 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 it shall
not be liable for any action taken or suffered to be taken by it in good faith
in accordance with instructions of any such officer or for any delay in acting
while waiting for these instructions. Any application by the Rights Agent for
written instructions from the Company may, at the option of the Rights Agent,
set forth in writing any action proposed to be taken 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 such omission shall be
effective. The Rights Agent shall not be liable to the Company for any action
taken 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 receives such 

                                       28

application, unless any such officer shall have consented in writing to an
earlier date) unless, prior to taking of any such 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
or omitted.

          20.8. Freedom to Trade in Company Securities. The Rights Agent and any
stockholder, 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 legal entity.

          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 resulting from any such act, omission, default, neglect or misconduct,
provided that reasonable care was exercised 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
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.

          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.

          Section 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 Incentive 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 Incentive 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 

                                       29

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 a
corporation 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 corporation 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 exercise stock transfer or corporate trust powers
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 $10 million. 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 Incentive 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 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.

          Section 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 

                                       30

Certificate shall be issued if, and to the extent that, appropriate adjustment
shall otherwise have been made in lieu of the issuance thereof.

          Section 23. Redemption.

          Section 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.

          Section 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 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
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.

          Section 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 Incentive Shares or to make any other distribution to the holders of
Incentive 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
Incentive Shares rights or warrants to subscribe for or to purchase any
additional Incentive Shares or shares 

                                       31

of stock of any class or any other securities, rights or options, or (c) to
effect any reclassification of its Incentive Shares (other than a
reclassification involving only the subdivision of outstanding Incentive
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 Incentive 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 Incentive 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 Incentive Shares and/or Common Shares, whichever
shall be the earlier.

          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 Incentive 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.

          Section 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:

                   Mentor Graphics Corporation
                   8005 S.W. Boeckman
                   Wilsonville, Oregon  97070-7777
                   Attention:  Secretary

                                       32

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:

                   American Stock, Transfer & Trust Co.
                   40 Wall Street, 46th Floor
                   New York, New York  10005
                   Attention:  Corporate Trust Division

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 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.

          Section 26. Supplements and Amendments. For so long as the Rights are
then redeemable, 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, 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. 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, 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) and (ii) 10%.

          Section 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 

                                       33

include Rights that have become 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"). 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 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 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 Incentive
Shares or fraction thereof (or equivalent incentive 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 Incentive Share (or equivalent
incentive 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.

          Section 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.

          Section 29. Benefits of this Agreement. Nothing in this Agreement
shall be construed to give to any Person or corporation other than the Company,
the Rights Agent and the registered holders of the Right Certificates (and,
prior to the Distribution Date, the Common 

                                       34

Shares) any legal or equitable right, remedy or claim under this Agreement; but
this Agreement shall be for the sole 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).

          Section 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 parties, and (y) not subject the Board of
Directors to any liability to the holders of the Rights.

          Section 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.

          Section 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 Oregon 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.

          Section 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.

          Section 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.

                                       35

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

                                    MENTOR GRAPHICS CORPORATION



                                    By DEAN FREED
                                       -----------------------------------------
                                       Name: Dean Freed
                                       Title: Vice President and General Counsel



                                    AMERICAN STOCK, TRANSFER & TRUST CO.



                                    By HERBERT J. LEMMER
                                       -----------------------------------------
                                       Name: Herbert J. Lemmer
                                       Title: Vice President

                                       36

                                                                       EXHIBIT A

                                     FORM OF

                                    AMENDMENT

                                       of

                     1987 RESTATED ARTICLES OF INCORPORATION

                                       of

                           MENTOR GRAPHICS CORPORATION

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

          The following Section D is added to Article III of the 1987 Restated
Articles of Incorporation of Mentor Graphics Corporation (the "Corporation"):

          D. This Article III.D sets forth the designation, preferences,
limitations and relative rights of a series of Incentive Stock of the
Corporation as determined by the Board of Directors of the Corporation (the
"Board of Directors" or the "Board") pursuant to its authority under ORS 60.134
and Article III.B of these Articles of Incorporation.

          1. Designation and Amount. The shares of such series shall be
designated as "Series A Junior Participating Incentive Stock" (the "Series A
Incentive Stock") and the number of shares constituting the Series A Incentive
Stock shall be 1,000,000.

          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 Incentive Stock with respect to dividends, the
     holders of shares of Series A Incentive Stock, in preference to the holders
     of Common Stock, no par value (the "Common Stock"), of the Corporation, and
     of any other stock ranking junior to the Series A Incentive 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

                                       A-1

     Date"), commencing on the first Quarterly Dividend Payment Date after the
     first issuance of a share or fraction of a share of Series A Incentive
     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
     Incentive 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 Incentive 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 Incentive 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 Incentive 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 Incentive 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 Incentive Stock entitled to
     receive a 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
     Incentive 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 Incentive 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.

          3. Voting Rights. Except as otherwise provided by law, the holders of
shares of Series A Incentive Stock shall not be entitled to vote on any matter
submitted to the vote of stockholders.

                                      A-2

          4. Certain Restrictions.

          (A) Whenever quarterly dividends or other dividends or distributions
     payable on the Series A Incentive Stock as provided in Section 2 are in
     arrears, thereafter and until all accrued and unpaid dividends and
     distributions, whether or not declared, on shares of Series A Incentive
     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 Incentive
          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
          Incentive Stock, except dividends paid ratably on the Series A
          Incentive 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 Incentive
          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 Incentive Stock; or

               (iv) redeem or purchase or otherwise acquire for consideration
          any shares of Series A Incentive Stock, or any shares of stock ranking
          on a parity with the Series A Incentive 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.

          5. Reacquired Shares. Any shares of Series A Incentive Stock purchased
or otherwise acquired by the Corporation in any manner whatsoever shall be
restored to the status of authorized but unissued shares after the acquisition
thereof. All such shares shall upon any such restoration become authorized but
unissued shares of Incentive Stock and may be reissued as part of a new series
of Incentive Stock subject to the conditions and restrictions on issuance 

                                      A-3

set forth herein, in the Restated Articles of Incorporation, or in any amendment
thereto creating a series of Incentive Stock or any similar stock or as
otherwise required by law.

          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 Incentive Stock unless, prior thereto, the holders of shares of Series
A Incentive 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
Incentive 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 Incentive Stock, except distributions made ratably on the Series A
Incentive 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 Incentive 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 Incentive
     Stock in respect thereof, then the assets available for such distribution
     shall be distributed ratably to the holders of the Series A Incentive 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.

          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 Incentive Stock shall at the same time be similarly exchanged or
changed into an amount per share, subject to the provision for adjustment

                                      A-4

hereinafter set forth, equal to 100 times the aggregate amount of stock,
securities, cash and/or 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 Incentive 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.

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

          9. Rank. The Series A Incentive 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 Incentive 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 Incentive Stock.

          10. Amendment. The Articles 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 Incentive 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 Incentive Stock, voting
separately as a single class.

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

                                      A-5

                                                                       EXHIBIT B

                           [Form of Right Certificate]

Certificate No. R-                                                _______ Rights

     NOT EXERCISABLE AFTER FEBRUARY 10, 2009 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
     13.3 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

                           MENTOR GRAPHICS CORPORATION

          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 February 10, 1999, as the same may be amended from time
to time (the "Agreement"), between Mentor Graphics Corporation, an Oregon
corporation (the "Company"), and American Stock, Transfer & Trust Co., a New
York corporation, 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. (pacific
time) on February 10, 2009, 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 Incentive
Stock, no par value (the "Incentive Shares"), of the Company, at a purchase
price of $95.00 per one one-hundredth of an Incentive 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 an Incentive 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 March 5, 1999 based on the Incentive 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 Incentive 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.

          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 

                                       B-1

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 principal 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 an Incentive 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 Incentive Shares will be issued upon the exercise of any
Right or Rights evidenced hereby (other than fractions of Incentive Shares which
are integral multiples of one one-hundredth of an Incentive 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
Incentive 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.

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

                                      B-2

          WITNESS the facsimile signature of the proper officers of the Company
and its corporate seal. Dated as of _______________.

Attest:                                MENTOR GRAPHICS CORPORATION


By _______________________________     By _______________________________
   Title:                                 Title:


Countersigned:

AMERICAN STOCK, TRANSFER & TRUST CO.,
as Rights Agent


By _______________________________
   Authorized Signature

                                      B-3

                   [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.

________________________________________________________________________________

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-4

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

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

To:  Mentor Graphics Corporation

          The undersigned hereby irrevocably elects to exercise ________________
Rights represented by this Right Certificate to purchase the Incentive 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-5

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-6

                                                                       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
                                INCENTIVE SHARES

          On February 10, 1999 the Board of Directors of Mentor Graphics
Corporation (the "Company") declared a dividend of one incentive share purchase
right (a "Right") for each share of common stock, no par value (the "Common
Shares"), of the Company outstanding at the close of business on March 5, 1999
(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 Incentive Stock (the
"Incentive Shares") at a price of $95.00 per one one-hundredth of an Incentive
Share, subject to adjustment (the "Purchase Price"). The description and terms
of the Rights are set forth in a Rights Agreement, dated as of February 10,
1999, as the same may be amended from time to time (the "Agreement"), between
the Company and American Stock, Transfer & Trust Co., as Rights Agent (the
"Rights Agent").

          Until the earlier to occur of (i) ten (10) days following a public
announcement that a person or group of affiliated or associated persons 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 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 

                                      C-1

("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 February 10, 2009, 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 Incentive 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
Incentive 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. Finally,
in the event of any merger, consolidation or other transaction in which Common
Shares are exchanged, each Incentive Share will be entitled to receive 100 times
the amount received per Common Share. Incentive Shares will not be redeemable.
These rights are protected by customary antidilution provisions. Except as
otherwise provided by law, the Incentive Shares are not entitled to vote on
matters submitted to the shareholders. Because of the nature of the Incentive
Share's dividend and liquidation rights, the value of one one-hundredth of an
Incentive Share purchasable upon exercise of each Right should approximate the
value of one Common Share.

          The Purchase Price payable, and the number of Incentive 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 Incentive
Shares, (ii) upon the grant to holders of the Incentive Shares of certain rights
or warrants to subscribe for or purchase Incentive Shares or convertible
securities at less than the current market price of the Incentive Shares or
(iii) upon the distribution to holders of the Incentive 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
Incentive 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 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
Purchase Price of the Right. In the event that, after a person has become an
Acquiring Person, the Company 

                                       C-2

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 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 Incentive Shares or Common Shares will be issued (other than
fractions of Incentive Shares which are integral multiples of one one-hundredth
of an Incentive 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 Incentive 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
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 Exempt Person) and (ii) 10%.

                                      C-3

          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