IKOS SYSTEMS INC
8-A12G/A, 1999-02-03
COMPUTER INTEGRATED SYSTEMS DESIGN
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<PAGE>
 
                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, DC  20549

                                   FORM 8-A/A

               FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES
                    PURSUANT TO SECTION 12(b) OR (g) OF THE
                        SECURITIES EXCHANGE ACT OF 1934

                               IKOS SYSTEMS, INC.
               (Exact name of registrant as specified in charter)


Delaware                                                              77-0100318
(State of incorporation                                            (IRS Employer
or organization)                                             Identification No.)

19050 Pruneridge Avenue, Cupertino, California                             95014
  (Address of principal executive offices)                            (Zip Code)

       Securities to be registered pursuant to Section 12(b) of the Act:

                                                Name of each exchange
     Title of each class                        on which each class is
     to be so registered                          to be registered

           None                                         None
                                        
         If this form relates to the registration of a class of securities
     pursuant to Section 12(b) of the Exchange Act and is effective pursuant to
     General Instruction A.(c), check the following box. [ ]

         If this form relates to the registration of a class of securities
     pursuant to Section 12(g) of the Exchange Act and is effective pursuant to
     General Instruction A.(d), check the following box [X]

       Securities to be registered pursuant to Section 12(g) of the Act:

                        Preferred Stock Purchase Rights
                               (Title of Class)
<PAGE>
 
                          AMENDMENT NO. 1 TO FORM 8-A

     The undersigned registrant hereby amends the following items, exhibits or
other portions of its Application for Registration on Form 8-A filed February
10, 1992 for its Series G Preferred Stock Purchase Rights as follows:

Item 1.   Description of Registrant's Securities to be Registered.
- -------   ------------------------------------------------------- 

     Pursuant to a Rights Agreement dated January 27, 1992 (the "Original Rights
Agreement") between IKOS Systems, Inc. (the "Company") and Manufacturers Hanover
Trust Company, as Rights Agent, the Board of Directors of the Company declared a
dividend distribution of one Preferred Stock Purchase Right (collectively, the
"Rights") for each outstanding share of Common Stock, $0.01 par value ("Common
Stock"), of the Company as of February 10, 1992 to stockholders of record as of
the close of business on that date.  Effective January 22, 1999, the Board of
Directors of the Company approved certain changes to the Original Rights
Agreement pursuant to an Amended and Restated Rights Agreement dated January 22,
1999 (the "Rights Agreement") between the Company and BankBoston, N.A., as
Rights Agent (the "Rights Agent").  The Original Rights Agreement was amended to
(i) change certain triggering percentages from twenty percent (20%) to fifteen
percent (15%), (ii) increase the exercise price from $10.00 to $30.00, (iii)
eliminate permitted offers and certain types of redemptions, (iv) add an
inadvertant person exemption, (v) extend the term of the Original Rights
Agreement from 2002 to 2009 and (vi) make certain additional technical
amendments.  Each Right entitles the registered holder to purchase from the
Company one-hundredth of a share of the Company's Series G Preferred Stock
("Preferred Stock") at a price of $30.00 per one-hundredth of a share (the
"Purchase Price").  The principal terms of the Rights Agreement are summarized
below and are qualified in their entirety by reference to the Rights Agreement
attached hereto as Exhibit 1.

     Until the earlier to occur of (i) the first date of a public announcement
that a person or group of affiliated or associated persons (an "Acquiring
Person"), other than the Company, any subsidiary of the Company or any employee
benefit plan or employee stock plan of the Company or of any subsidiary of the
Company ("Exempt Person"), has acquired, or obtained the right to acquire,
beneficial ownership of securities of the Company representing fifteen percent
(15%) or more of the outstanding Common Stock of the Company (other than solely
as a result of a reduction in the outstanding shares of the Common Stock of the
Company) or such earlier date as a majority of the Board of Directors shall
become aware of such acquisition of the Common Stock (the "Stock Acquisition
Date") or (ii) the tenth business day (subject to extension by the Board prior
to the time a person becomes an Acquiring Person) following the commencement of,
or public announcement of an intention to commence, by any person or group, a
tender or exchange offer (other than a tender or exchange offer by an Exempt
Person), the consummation of which would result in the beneficial ownership of
fifteen percent (15%) or more of the outstanding Common Stock (the earlier of
such dates being called the "Distribution Date"), the Rights will be evidenced,
with respect to any of the Common Stock certificates outstanding as of February
10, 1992, by such Common Stock certificate with a copy of a Summary of Rights
attached thereto.  The Rights Agreement provides that, until the Distribution
Date (or earlier 

                                       2
<PAGE>
 
redemption or expiration of the Rights), the Rights will be represented by and
transferred with, and only with, the Common Stock. Until the Distribution Date
(or earlier redemption or expiration of the Rights), new certificates issued for
Common Stock (including, without limitation, certificates issued upon transfer
or exchange of Common Stock) after February 10, 1992, will contain a legend
incorporating the Rights Agreement by reference. Until the Distribution Date (or
earlier redemption or expiration of the Rights), the surrender for transfer of
any of the Company's Common Stock certificates, with or without the aforesaid
legend or a copy of a Summary of Rights attached thereto, will also constitute
the transfer of the Rights associated with the Common Stock represented by such
certificate. As soon as practicable following the Distribution Date, separate
certificates evidencing the Rights ("Right Certificates") will be mailed to
holders of record of the Company's Common Stock as of the close of business on
the Distribution Date, and such Rights Certificates alone will evidence the
Rights from and after the Distribution Date.

     The Rights are not exercisable until the Distribution Date.  The Rights
will expire upon the earlier to occur of (i) ten (10) years after the date of
issuance (January 22, 2009) or (ii) the redemption or exchange by the Company as
described below.

     The Purchase Price payable, and the number of shares of Preferred Stock or
other securities or property issuable, upon exercise of the Rights are subject
to adjustment from time to time to prevent dilution (i) in the event of a stock
dividend on, or a subdivision, combination or reclassification of the Preferred
Stock, (ii) upon the grant to holders of the Preferred Stock of certain rights
or warrants to subscribe for Preferred Stock or convertible securities at less
than the current market price of the Preferred Stock or (iii) upon the
distribution to holders of the Preferred Stock of evidences of indebtedness or
assets (excluding dividends payable in Preferred Stock) or of subscription
rights or warrants (other than those referred to above).

     The Preferred Stock purchasable upon exercise of the Rights will be
nonredeemable and junior to any other series of preferred stock the Company may
issue (unless otherwise provided in the terms of such stock).  Each share of
Preferred Stock will have a preferential cumulative quarterly dividend in an
amount equal to the greater of (a) $25.00 or (b) 100 times the dividend declared
on each share of Common Stock.  In the event of liquidation, the holders of
Preferred Stock will receive a preferred liquidation payment equal to the
greater of (a) $1,000.00 per share, plus accrued dividends to the date of
distribution whether or not earned or declared, or (b) an amount per share equal
to 100 times the aggregate payment to be distributed per share of Common Stock.
Each share of Preferred Stock will have 100 votes, voting together with the
shares of Common Stock.  In the event of any merger, consolidation or other
transaction in which shares of Common Stock are exchanged for or changed into
other securities, cash and/or other property, each share of Preferred Stock will
be entitled to receive 100 times the amount and type of consideration received
per share of Common Stock.  The rights of the Preferred Stock as to dividends,
liquidation and voting, and in the event of mergers and consolidations, are
protected by customary anti-dilution provisions.  Fractional shares of Preferred
Stock will be issuable; however, the Company may elect to distribute depository
receipts in lieu of such fractional shares.  In lieu of fractional shares other
than fractions that are multiples of one-hundredth of a 

                                       3
<PAGE>
 
share, an adjustment in cash will be made based on the market price of the
Preferred Stock on the last trading date prior to the date of exercise.

     Unless the Rights are earlier redeemed, if, following the occurrence of a
Flip In Event (as defined below), the Company were to be acquired in a merger or
other business combination transaction (in which any shares of the Company's
Common Stock are converted into or exchanged for other securities or assets)
(other than a merger or other business combination in which the voting power
represented by the Company's securities outstanding immediately prior thereto
continues to represent all of the voting power represented by the securities of
the Company thereafter and the holders of such securities have not changed as a
result of such transaction) or fifty percent (50%) or more of the assets or
earnings power of the Company and its subsidiaries (taken as a whole) were to be
sold or transferred in one or a series of related transactions (such
transactions are collectively referred to herein as the "Schedule 13 Events"),
the Rights Agreement provides that proper provision shall be made so that each
holder of record of a Right (other than an Acquiring Person, or Affiliates or
Associates thereof) will from and after such date have the right to purchase,
upon payment of the then current Purchase Price, that number of shares of common
stock of the acquiring company having a market value at the time of such
transaction equal to the Purchase Price divided by one-half the Current Market
Price (as defined in the Rights Agreement) of such common stock.

     In the event (i) any Person (other than an Exempt Person) becomes the
beneficial owner of fifteen percent (15%) or more of the then outstanding shares
of Common Stock, or (ii) any Acquiring Person or any of its Affiliates or
Associates, directly or indirectly, (1) merges, consolidates or otherwise
combines with the Company or any of its subsidiaries or in a transaction in
which the Company or such subsidiary is the continuing or surviving corporation
of such merger, consolidation or combination, (2) transfers, in one or more
transactions, any assets to the Company or any of its subsidiaries in exchange
for securities of the Company or any of its subsidiaries or for securities
exercisable for or convertible into capital stock of the Company or any of its
subsidiaries or otherwise obtains from the Company or any of its subsidiaries,
with or without consideration, any capital stock of the Company or any of its
subsidiaries or securities exercisable for or convertible into capital stock of
the Company or any of its subsidiaries (other than as part of a pro rata offer
or distribution to all holders of such stock), (3) sells, purchases, leases,
exchanges, mortgages, pledges, transfers, acquires or otherwise acquires or
disposes, to, from or with the Company or any of its subsidiaries, as the case
may be, assets on terms and conditions less favorable to the Company or such
subsidiary than the Company or such subsidiary would be able to obtain in an
arm's length negotiation with an unaffiliated third party, (4) receives any
compensation from the Company or any of its subsidiaries for services other than
compensation for employment as a regular or part-time employee, or fees for
serving as a director at rates in accordance with the Company's (or its
subsidiary's) past practice, (5) receives the benefit (except proportionately as
a stockholder) of any loans, advances, guarantees, pledges or other financial
assistance or tax credit or advantage or (6) engages in any transaction with the
Company (or any of its subsidiaries) involving the sale, license or other
transfer of any right in, or disclosure of, any patents, copyrights, trade
secrets, trademarks or know-how (or any other intellectual or industrial
property rights recognized under any country's intellectual property rights
laws) which the Company (including its subsidiaries) 

                                       4
<PAGE>
 
owns or has the right to use on terms and conditions not approved by the Board
of Directors of the Company, or (iii) while there is an Acquiring Person, there
shall occur any reclassification of securities (including any reverse stock
split), any recapitalization of the Company, or any merger or consolidation of
the Company with any of its subsidiaries or any other transaction or
transactions involving the Company or any of its subsidiaries (whether or not
involving the Acquiring Person) which have the effect of increasing by more than
one percent (1%) the proportionate share of the outstanding shares of any class
of equity securities of the Company or any of its subsidiaries which is directly
or indirectly owned or controlled by the Acquiring Person (such events are
collectively referred to herein as the "Flip In Events"), then, and in each such
case, each holder of record of a Right, other than the Acquiring Person, will
thereafter have the right to purchase, upon payment of the then current Purchase
Price, such number of shares of Common Stock having a market value at the time
of the transaction equal to the Purchase Price divided by one-half the Current
Market Price (as defined in the Rights Agreement) of the Common Stock. Rights
are not exercisable following the occurrence of the events set forth in this
paragraph until the expiration of the period during which the Rights may be
redeemed as described below. The holder of any Rights that are or were at any
time, on or after the earlier of the Stock Acquisition Date or the Distribution
Date, beneficially owned by an Acquiring Person or any Associate or Affiliate
thereof or certain transferees, which is or was involved in or which caused or
facilitated, directly or indirectly, the event or transaction or transactions
described in this paragraph, shall be null and void and no longer be
transferable.

     No fractional shares of Common Stock will be issued upon exercise of the
Rights and, in lieu thereof, a payment in cash will be made to the holder of
such Rights equal to the same fraction of the current market value of a share of
Common Stock.

     The Rights are redeemable in whole, but not in part, at a price of $.001
per Right by the vote of the Company's Board of Directors at any time prior to
the earlier of (i) the first occurrence of a Flip In Event or (ii) the Close of
Business (as defined in the Rights Agreement) on the Expiration Date.
Immediately upon the action of the Board of Directors of the Company authorizing
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
without any interest thereon.

     If a Flip In Event occurs, and prior to the acquisition by an Acquiring
Person or group of fifty percent (50%) or more of the outstanding shares of the
Company's Common Stock, the Board of Directors of the Company may exchange all
or any portion of the outstanding and exercisable Rights (other than Rights held
by any Acquiring Person which have become void) for shares of Common Stock on a
pro rata basis at an exchange ratio of one share of Common Stock (or of a share
of a class or series of the Company's preferred stock having the equivalent
rights, preferences and privileges) per Right (subject to adjustment to reflect
any stock split, stock dividend or similar transaction).  Immediately upon the
ordering of such exchange 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 shares of Common Stock pursuant to the exchange.  In the
event there are insufficient shares of Common Stock issued but not outstanding
or authorized 

                                       5
<PAGE>
 
but unissued to permit any exchange of Rights, the Company shall take all
actions necessary to authorize additional shares.

     Until the Rights become nonredeemable, the Company may, except with respect
to the redemption price, amend the Rights Agreement in any manner without the
approval of any holders of the Rights.  After the Rights become nonredeemable,
the Company may, without the approval of any holders of Rights Certificates,
amend the Rights Agreement to (i) cure any ambiguity, (ii) correct or supplement
any provision which may be defective or inconsistent with any other provisions,
(iii) shorten or lengthen any time period under the Rights Agreement, or (iv)
change or supplement the provisions of the Rights Agreement in any manner which
the Company may deem necessary or desirable; provided that no such supplement or
amendment shall adversely affect the interests of the holders of the Rights
(other than an Acquiring Person or an Affiliate or an Associate of an Acquiring
Person) and no such amendment may cause the Rights again to become redeemable or
cause the Rights Agreement again to become freely amendable other than in
accordance with this sentence.

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

     The issuance of the Rights is not taxable to the Company or to stockholders
under presently existing federal income tax law, and will not change the way in
which stockholders can presently trade the Company's shares of Common Stock.  If
the Rights should become exercisable, stockholders, depending on then existing
circumstances, may recognize taxable income.

     The Rights have certain anti-takeover effects.  Under certain circumstances
the Rights could cause substantial dilution to a person or group who attempts to
acquire the Company on terms not approved by the Company's Board of Directors.
The Rights should not interfere with any merger or other business combination
approved by the Board.

     The foregoing description of the Rights is qualified in its entirety by
reference to the Rights Agreement (including Exhibit A, the Certificate of
Designation, Exhibit B, the form of Rights Certificate, and Exhibit C, the
Summary of Terms), which is attached hereto as Exhibit 1.

Item 2.   Exhibits
- -------   --------

     1.   Amended and Restated Rights Agreement dated January 22, 1999 between
          IKOS Systems, Inc. and BankBoston, N.A., as Rights Agent, including
          the Certificate of Designation, the form of Rights Certificate and the
          Summary of Terms attached thereto as Exhibits A, B and C,
          respectively.

     2.   Certificate of Incorporation of Registrant(1).

     3.   Certificate of Amendment of Certificate of Incorporation of
          Registrant(2).

                                       6
<PAGE>
 
     4.   Certificate of Amendment of Certificate of Incorporation of
          Registrant(3).

     5.   Certificate of Amendment of Certificate of Incorporation of
          Registrant(4).

     6.   Bylaws of Registrant(5).

     7.   Certificate of Amendment to the Bylaws of Registrant.

     8.   Press Release dated January 25, 1999.
 
- ------------------

     (1) Incorporated herein by reference to Exhibit 4.1 to the Company's
     Registration Statement on Form S-1 effective July 25, 1990.

     (2) Incorporated herein by reference to Exhibit 4.1 to the Company's
     Registration Statement on Form S-2 effective October 12, 1995.

     (3) Incorporated herein by reference to Exhibit 4.2 to the Company's
     Registration Statement on Form S-2 effective October 12, 1995.

     (4) Incorporated herein by reference to Exhibit 3.4 to the Company's
     Quarterly Report on Form 10-Q for the quarter ended March 29, 1997.

     (5) Incorporated herein by reference to Exhibit 3.2 to the Company's
     Registration Statement on Form S-1 effective July 25, 1990.

                                       7
<PAGE>
 
                                  SIGNATURES
                                  ----------

     Pursuant to the requirements of Section 12 of the Securities Exchange Act

of 1934, the Registrant has duly caused this Registration Statement to be signed

on its behalf by the undersigned, thereunto duly authorized.


                                IKOS SYSTEMS, INC.
                                (Registrant)



                                By:     /s/ JOSEPH W. ROCKOM
                                    -----------------------------------
                                Name:   Joseph W. Rockom
                                Title:  Chief Financial Officer


Dated:  January 31, 1999

                                       8
<PAGE>
 
                               INDEX TO EXHIBITS


Exhibit No.
- -----------

     1.     Amended and Restated Rights Agreement dated January 22, 1999 between
            IKOS Systems, Inc. and BankBoston, N.A., as Rights Agent, including
            the Certificate of Designation, the form of Rights Certificate and
            the Summary of Terms attached thereto as Exhibits A, B and C,
            respectively.

     2.     Certificate of Incorporation of Registrant(1).

     3.     Certificate of Amendment of Certificate of Incorporation of
            Registrant(2).

     4.     Certificate of Amendment of Certificate of Incorporation of
            Registrant(3).

     5.     Certificate of Amendment of Certificate of Incorporation of
            Registrant(4).

     6.     Bylaws of Registrant(5).

     7.     Certificate of Amendment to the Bylaws of Registrant.

     8.     Press Release dated January 25, 1999.

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

     (1) Incorporated herein by reference to Exhibit 4.1 to the Company's
     Registration Statement on Form S-1 effective July 25, 1990.

     (2) Incorporated herein by reference to Exhibit 4.1 to the Company's
     Registration Statement on Form S-2 effective October 12, 1995.

     (3) Incorporated herein by reference to Exhibit 4.2 to the Company's
     Registration Statement on Form S-2 effective October 12, 1995.

     (4) Incorporated herein by reference to Exhibit 3.4 to the Company's
     Quarterly Report on Form 10-Q for the quarter ended March 29, 1997.

     (5) Incorporated herein by reference to Exhibit 3.2 to the Company's
     Registration Statement on Form S-1 effective July 25, 1990.

                                       9

<PAGE>
 
                                                                     EXHIBIT 1

                             IKOS SYSTEMS, INC.
                                        
                                     and

                              BANK BOSTON, N.A.

                                Rights Agent

                    AMENDED AND RESTATED RIGHTS AGREEMENT
                        Dated as of January 22, 1999
                                        
<PAGE>
 
                               TABLE OF CONTENTS

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

2.   Appointment of Rights Agent...................................................   6

3.   Issuance of Right Certificates................................................   6

4.   Form of Right Certificates....................................................   8

5.   Countersignature and Registration.............................................   8

6.   Transfer, Split Up, Combination and Exchange of Right Certificates;
     Mutilated, Destroyed, Lost or Stolen Right Certificates.......................   9

7.   Exercise of Rights; Purchase Price; Expiration Date of Rights.................  10

8.   Cancellation and Destruction of Right Certificates............................  11

9.   Reservation and Availability of Shares of Preferred Stock.....................  11

10.  Preferred Stock Record Date...................................................  13

11.  Adjustments to Number and Kind of Shares, Number of Rights or Purchase Price..  13

12.  Certification of Adjustments..................................................  22

13.  Consolidation, Merger or Sale or Transfer of Assets or Earning Power..........  22

14.  Fractional Rights and Fractional Shares.......................................  26

15.  Rights of Action..............................................................  27

16.  Agreement of Right Holders....................................................  27

17.  Right Certificate Holder Not Deemed a Stockholder.............................  28

18.  Concerning the Rights Agent...................................................  28

19.  Merger or Consolidation or Changed Name of Rights Agent.......................  29

20.  Duties of Rights Agent........................................................  29

21.  Change of Rights Agent........................................................  31

22.  Issuance of New Right Certificates............................................  32
</TABLE> 

                                       i
<PAGE>
 
<TABLE> 
<CAPTION> 
<S>  <C>                                                                             <C> 
23.  Redemption....................................................................  32

24.  Exchange of Rights for Common Stock...........................................  33

25.  Notice of Proposed Actions....................................................  35

26.  Notices.......................................................................  35

27.  Supplements and Amendments....................................................  36

28.  Successors....................................................................  37

29.  Benefits of this Rights Agreement.............................................  37

30.  Governing Law.................................................................  37

31.  Counterparts..................................................................  37

32.  Descriptive Headings..........................................................  37

33.  Severability..................................................................  37
</TABLE>

                                       ii
<PAGE>
 
                     AMENDED AND RESTATED RIGHTS AGREEMENT
                     -------------------------------------

     This Amended and Restated Rights Agreement ("Rights Agreement"), dated as
of January 22, 1999, between IKOS Systems, Inc., a Delaware corporation (the
"Company"), and Bank Boston, N.A., a national banking association (the "Rights
Agent").

                              W I T N E S S E T H:
                              - - - - - - - - - - 

     WHEREAS, the Board of Directors of the Company on January 27, 1992 (i)
announced that it authorized the issuance and declared a dividend of one right
("Right") for each share of the common stock par value $0.01 per share of the
Company ("Common Stock") of the Company outstanding as of the Close of Business
(as defined herein) on February 10, 1992 (the "Record Date"), each Right
representing the right to purchase one-hundredth of a share of Series G
Preferred Stock of the Company having the rights, powers and preferences set
forth in the form of Certificate of Designation attached hereto as Exhibit A
                                                                   ---------
upon the terms and subject to the conditions hereinafter set forth, and (ii)
further authorized the issuance of one Right with respect to each share of
Common Stock of the Company that shall become outstanding between February 10,
1992, and the Distribution Date (as defined herein) pursuant to that certain
Rights Agreement dated as of January 27, 1992 (the "Prior Agreement");

     WHEREAS, the Board has determined that it is in the best interest of the
Company and its stockholders to (i) change certain triggering percentages
(including the percentage of beneficial ownership determining an Acquiring
Person) from 20% to 15%, (ii) eliminate permitted offers and certain types of
redemptions, (iii) add an inadvertent person exemption, (iv) extend the term of
the Rights Plan from 2002 to 2009 and (v) make certain additional technical
amendments to the prior Agreement.

     WHEREAS, the Company requested that the Prior Agreement be amended and
restated as set forth herein and the Rights Agent is willing to amend and
restate the Prior Agreement as set forth herein.

     NOW, THEREFORE, in consideration of the promises and the mutual agreements
herein set forth, the prior Agreement is hereby amended and restated to read in
full as follows:

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

          (a)   "Acquiring Person" shall mean any Person (as defined herein) who
or which, together with all Affiliates (as defined herein) and Associates (as
defined herein) of such Person, without the prior approval of the Board of
Directors, shall be the Beneficial Owner (as defined herein) of fifteen percent
(15%) or more of the outstanding Common Stock; provided, however, that in no
                                               ----------------- 
event shall a Person who or which, together with all Affiliates and Associates
of such Person, is the Beneficial Owner of less than fifteen percent (15%) of
the Company's outstanding shares of Common Stock, become an Acquiring Person
solely as a result of a reduction of the number of shares of outstanding Common
Stock, including repurchases of 
<PAGE>
 
outstanding shares of Common Stock by the Company, which reduction increases the
percentage of outstanding shares of Common Stock beneficially owned by such
Person, provided, however, that if a Person shall become the Beneficial
        -----------------                                              
Owner of fifteen percent (15%) or more of the Company's outstanding shares of
Common Stock then outstanding solely by reason of a reduction of the number of
shares of outstanding Common Stock, and shall thereafter become the Beneficial
Owner of any additional shares of Common Stock of the Company, then such Person
shall be deemed to be an "Acquiring Person" unless upon the consummation of the
acquisition of such additional shares of Common Stock such person does not own
fifteen percent (15%) or more of the shares of Common Stock then outstanding,
and provided further, that an Acquiring Person shall not include an Exempt
    ----------------         
Person (as defined herein). 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 paragraph (a), has become an "Acquiring Person" inadvertently
(including, without limitation, because (i) 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 (ii) such Person was aware of the extent
of its Beneficial Ownership but had no actual knowledge of the consequences of
such Beneficial Ownership under this Rights 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 shares of Common Stock so that
such Person would no longer be an "Acquiring Person," as defined pursuant to the
foregoing provisions of this paragraph (a), then such Person shall not be deemed
to be or to have become an "Acquiring Person" for any purpose of this Rights
Agreement.

         (b)   "Adjustment Shares" shall have the meaning set forth in Section
11(a)(ii) hereof.

         (c)   "Affiliate" and "Associate" shall have the respective meanings
ascribed to such terms in Rule 12b-2 of the General Rules and Regulations under
the Securities Exchange Act of 1934, as amended ("Exchange Act"), as in effect
on the date of this Rights Agreement.

         (d)   A Person shall be deemed the "Beneficial Owner" of any securities

               (i)    which such Person or any of such Person's Affiliates or
Associates beneficially owns, directly or indirectly;

               (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) pursuant to
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, or upon the
exercise of conversion rights, exchange rights, rights (other than the Rights),
warrants or options, or otherwise; provided, however, that a Person shall not be
                                   -----------------        
deemed the "Beneficial Owner" of, or to "beneficially own," securities tendered
pursuant to a tender or exchange offer made by such Person or any of such
Person's Affiliates or Associates until such tendered securities are accepted
for purchase or exchange; or (B) the right to vote or dispose of or has
"beneficial


                                      2

<PAGE>
 
ownership" of (as determined pursuant to Rule 13d-3 of the General Rules and
Regulations under the Exchange Act, or any comparable or successor rule),
including 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 securities if the
agreement, arrangement or understanding to vote such security (1) arises solely
from a revocable proxy or consent given 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 by such
Person 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 with which such Person or any of such Person's Affiliates or
Associates has any agreement, arrangement or understanding (whether or not in
writing) for the purpose of acquiring, holding, voting except as described in
the proviso to clause (B) of subparagraph (ii) of this Section 1(d) 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(d)),
including, without limitation, in a fiduciary capacity, by an Exempt Person or
by any other such officer, director or employee of an Exempt Person.

     For all purposes of this Rights Agreement, any calculation of the number of
shares of Common Stock outstanding at any particular time, including for
purposes of determining the particular percentage of such outstanding shares of
Common Stock 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 Exchange Act as in effect on the date hereof.

          (e)   "Business Day" shall mean any day other than a Saturday, Sunday
or a day on which banking institutions in the Commonwealth of Massachusetts are
authorized or obligated by law or executive order to close.

          (f)   "Close of Business" on any given date shall mean 5:00 P.M.,
Eastern time, on such date; provided, however, that if such date is not a
Business Day it shall mean 5:00 P.M., Eastern time, on the next succeeding
Business Day.

          (g)   "Common Stock" when used with reference to the Company shall
mean the common stock of the Company. "Common Stock" when used with reference to
any Person other than the Company which shall be organized in corporate form
shall mean the capital stock or other equity security with the greatest per
share voting power of such Person or, if such Person is a Subsidiary of or is
controlled by another Person, the Person which ultimately controls such first-
mentioned Person. "Common Stock," when used with reference to any Person other
than the Company which shall not be organized in corporate form, shall mean
units of beneficial interest which shall represent the right to participate in
profits, losses, deductions and credits of such Person and which shall be
entitled to exercise the greatest voting power per unit of such Person.


                                       3

<PAGE>
 
          (h)   "Common Stock Equivalents" shall have the meaning set forth in
Section 11(a)(iii) hereof.

          (i)   "Current Market Price" shall have the meaning set forth in
Section 11(d) hereof.

          (j)   "Current Value" shall have the meaning set forth in Section
11(a)(iii) hereof.

          (k)   "Distribution Date" shall have the meaning set forth in Section
3(a) hereof.

          (l)   "Equivalent Preferred Stock" shall have the meaning set forth in
Section 11(b) hereof.

          (m)   "Exchange Act" shall have the meaning set forth in Section 1(c)
hereof.

          (n)   "Exchange Date" shall have the meaning set forth in Section
24(d) hereof.

          (o)   "Exempt Person" shall mean the Company or any Subsidiary of the
Company including, without limitation, in its fiduciary capacity, any employee
benefit plan or employee stock plan of the Company or of any Subsidiary of the
Company, or any Person, organized, appointed, established or holding Common
Stock for or pursuant to the terms of any such plan or any Person funding other
employee benefits for employees of the Company or any Subsidiary of the Company.

          (p)   "Final Expiration Date" shall have the meaning set forth in
Section 7(a) hereof.

          (q)   "Flip-In Event" shall mean any event described in Section
11(a)(ii)(A), 11(a)(ii)(B) or 11(a)(ii)(C) hereof.

          (r)   "Flip-In Exercise Payment" shall have the meaning set forth in
Section 11(a)(ii) hereof.

          (s)   "Flip-In Trigger Date" shall have the meaning set forth in
Section 11(a)(iii) hereof.

          (t)   "Flip-Over Event" shall mean any event described in clause (x),
(y) or (z) of Section 13(a) hereof.

          (u)   "Flip-Over Exercise Payment" shall have the meaning set forth in
Section 13(a) hereof.

          (v)   "NASDAQ" shall have the meaning set forth in Section 9(b)
hereof.

          (w)   "Person" shall mean any individual, firm, corporation,
partnership, trust or other entity.


                                       4

<PAGE>
 
          (x)   "Preferred Stock" shall mean the Series G Preferred Stock, $0.01
par value of the Company having the rights, powers and preferences set forth in
Exhibit A hereto, and, to the extent that there is not a sufficient number
- ---------                                                                 
of shares of Series G Preferred Stock authorized to permit the full exercise of
the Rights, any other series of Preferred Stock, $0.01 par value, of the Company
designated for such purpose containing terms substantially similar to the terms
of the Series G Preferred Stock.

          (y)   "Principal Party" shall have the meaning set forth in Section
13(b) hereof.

          (z)   "Purchase Price" shall have the meaning set forth in Section
4(a) hereof.

          (aa)  "Record Date" shall have the meaning set forth in the initial
WHEREAS clause at the beginning of this Rights Agreement.

          (bb)  "Redemption Price" shall have the meaning set forth in Section
23(a) hereof.

          (cc)  "Right Certificate" shall have the meaning set forth in Section
3(a) hereof.

          (dd)  "Securities Act" shall mean the Securities Act of 1933, as
amended.

          (ee)  "Stock Acquisition Date" shall mean the first date of public
announcement by the Company or an Acquiring Person that an Acquiring Person has
become such or such earlier date as a majority of the directors shall become
aware of the existence of an Acquiring Person.

          (ff)  "Substitution Period" shall have the meaning set forth in
Section 11(a)(iii) hereof.

          (gg)  "Subsidiary" of a Person shall mean any corporation or other
entity of which securities or other ownership interests having ordinary voting
power sufficient to elect a majority of the board of directors or other persons
performing similar functions are beneficially owned, directly or indirectly, by
such Person and any corporation or other entity that is otherwise controlled by
such Person.

          (hh)  "Summary of Rights" shall have the meaning set forth in Section
3(b) hereof.
 
          (ii)  "Trading Day" shall have the meaning set forth in Section
11(d)(i) hereof.

          (jj)  "Triggering Event" shall mean any event described in Section
11(a)(ii)(A), 11(a)(ii)(B), or 11(a)(ii)(C) or Section 13 hereof.

          (kk)  "Voting Power" shall mean the voting power of all securities of
the Company then outstanding and generally entitled to vote for the election of
directors of the Company.


                                       5

<PAGE>
 
     Any determination required by the definitions contained in this Section 1
shall be made by the Board of Directors of the Company in its good faith
judgment, which determination shall be binding on the Rights Agent and the
holders of the Rights.

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

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

          (a)   Until the earlier of (i) the tenth day after the Stock
Acquisition Date (or, if the tenth day after the Stock Acquisition Date occurs
before the Record Date, the Close of Business on the Record Date) or (ii) the
tenth business day (or such later date as may be determined by action of the
Board of Directors prior to such time as any Person becomes an Acquiring Person)
after the date of the commencement by any Person (other than an Exempt Person)
of, or of the first public announcement of the intent of any Person (other than
an Exempt Person) to commence (which intention to commence remains in effect for
five business days after such announcement), a tender or exchange offer upon the
successful consummation of which such Person, together with its Affiliates and
Associates, would be the Beneficial Owner of fifteen percent (15%) or more of
the outstanding Common Stock (irrespective of whether any shares are actually
purchased pursuant to any such offer) (including any such date which is after
the date of this Rights Agreement and prior to the issuance of the Rights; the
earlier of such dates being herein referred to as the "Distribution Date"), (x)
the Rights will be evidenced (subject to the provisions of Section 3(c) hereof)
by the certificates for the Common Stock registered in the names of the holders
of the Common Stock and not by separate Right certificates, and (y) each Right
will be transferable only in connection with the transfer of a share (subject to
adjustment as hereinafter provided) of Common Stock. As soon as practicable
after the Distribution Date, the Rights Agent will mail, by first-class, postage
prepaid mail, to each record holder of the Common Stock as of the Close of
Business on the Distribution Date, as shown by the records of the Company, to
the address of such holder shown on such records, a Right certificate in
substantially the form of Exhibit B hereto (individually, a "Right Certificate"
                          ---------       
and collectively, the "Right Certificates") evidencing one Right for each share
of Common Stock so held. As of and after the Distribution Date the Rights will
be evidenced solely by such Right Certificates.

          (b)   On the Record Date, the Company sent a copy of a Summary of
Rights to Purchase Preferred Stock, substantially in the form attached hereto as
Exhibit C ("Summary of Rights"), by first-class, postage prepaid mail, to
- ---------                                                                
each record holder of Common Stock as of the Close of Business on the Record
Date at the address of such holder shown on the records of the Company.


                                       6

<PAGE>
 
          (c)   Rights shall be issued in respect of all shares of Common Stock
that are issued (either as an original issuance or from the Company's treasury)
after the Record Date prior to the earlier of the Distribution Date or the
Expiration Date. With respect to certificates representing such shares of Common
Stock, the Rights will be evidenced by such certificates for Common Stock
registered in the names of the holders thereof together with a copy of the
Summary of Rights. Until the Distribution Date (or, if earlier, the Redemption
Date or Final Expiration Date), the surrender for transfer of any certificate
for Common Stock outstanding on the Record Date, with or without a copy of the
Summary of Rights attached thereto, shall also constitute the surrender for
transfer of the Rights associated with the Common Stock represented thereby.

          (d)   Certificates issued for Common Stock (including, without
limitation, certificates issued upon transfer or exchange of Common Stock) after
the Record Date but prior to the earlier of the Distribution Date, or the
Expiration Date shall have impressed on, printed on, written on or otherwise
affixed to them the following legend:

     This certificate also evidences and entitles the holder hereof to certain
     Rights as set forth in the Rights Agreement between IKOS Systems, Inc. and
     Bank Boston, N.A., as Rights Agent, dated as of January 27, 1992, as the
     same may be amended from time to time (the "Rights Agreement"), the terms
     of which are incorporated herein by reference and a copy of which is on
     file at the principal executive office of IKOS Systems, Inc.  Under certain
     circumstances, as set forth in the Rights Agreement, such Rights will be
     evidenced by separate certificates and will no longer be evidenced by this
     certificate.  IKOS Systems, Inc. will mail to the holder of this
     certificate a copy of the Rights Agreement without charge within five days
     after receipt by it of a written request therefor.  Under certain
     circumstances as provided in the Rights Agreement, Rights issued to,
     beneficially owned by or transferred to any Person who is or becomes an
     Acquiring Person (as defined in the Rights Agreement) or an Associate or
     Affiliate (as defined in the Rights Agreement) thereof and certain
     transferees thereof will be null and void and will no longer be
     transferable.

     With respect to such certificates containing the foregoing legend, the
Rights associated with the Common Stock represented by such certificates shall,
until the Distribution Date, be evidenced by such certificates alone, registered
holders of Common Stock shall also be the registered holders of the associated
Rights, and the surrender for transfer of any such certificate shall also
constitute the surrender for transfer of the Rights associated with the Common
Stock represented thereby.  In the event that the Company purchases or acquires
any shares of Common Stock after the Record Date but prior to the earlier of the
Distribution Date, the Redemption Date or the Expiration Date, any Rights
associated with such shares of Common Stock shall be deemed canceled and retired
so that the Company shall not be entitled to exercise any Rights associated with
the shares of Common Stock no longer outstanding.

     Notwithstanding this paragraph (d), the omission of a legend shall not
affect the enforceability of any part of this Rights Agreement or the rights of
any holder of the Rights.


                                       7

<PAGE>
 
     4.   Form of Right Certificates.
          -------------------------- 

          (a)   The Right Certificates (and the forms of election to purchase
shares and of assignment to be printed on the reverse thereof), when, as and if
issued, shall be substantially in the form set forth in 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 Rights Agreement, or as may be required
to comply with any law or with any rule or regulation made pursuant thereto or
with any rule or regulation of any stock exchange on which the Rights may from
time to time be listed, or to conform to usage. Subject to the provisions of
Sections 11, 13 and 22 hereof, the Right Certificates evidencing the Rights
issued on the Record Date whenever such certificates are distributed shall be
dated as of the Record Date and the Right Certificates evidencing Rights to
holders of record of Common Stock issued after the Record Date shall be dated as
of the Record Date, but shall also be dated to reflect the date of issuance of
such Right Certificate. On their face, Right Certificates shall entitle the
holders thereof to purchase, for each Right, one-hundredth of a share of Series
G Preferred Stock, or other securities or property as provided herein, as the
same may from time to time be adjusted as provided herein, at the per share
exercise price of $30.00, as the same may from time to time be adjusted as
provided herein (the "Purchase Price").

          (b)   Notwithstanding any other provision of this Rights Agreement,
any Right Certificate that represents Rights that are or were at any time on or
after the earlier of the Stock Acquisition Date or the Distribution Date
beneficially owned by an Acquiring Person or any Affiliate or Associate thereof
(or any transferee of such Rights) shall have impressed on, printed on, written
on or otherwise affixed to it (if the Company or the Rights Agent has knowledge
that such Person is an Acquiring Person or an Associate or Affiliate thereof or
transferee of such Persons or a nominee of any of the foregoing) the following
legend:

     The beneficial owner of the Rights represented by this Right Certificate is
     an Acquiring Person or an Affiliate or Associate (as defined in the Rights
     Agreement) of an Acquiring Person or a subsequent holder of such Right
     Certificates beneficially owned by such Persons.  Accordingly, this Right
     Certificate and the Rights represented hereby are null and void and will no
     longer be transferable as provided in the Rights Agreement.

     The provisions of Section 11(a)(ii) and Section 24 of this Rights Agreement
shall be operative whether or not the foregoing legend is contained on any such
Right Certificates.

     5.   Countersignature and Registration.
          --------------------------------- 

          (a)   The Right Certificates shall be executed on behalf of the
Company by its Chairman of the Board, its Chief Executive Officer, its President
or any Vice President, either manually or by facsimile signature, and have
affixed thereto the Company's seal or a facsimile thereof which shall be
attested by the Secretary or an Assistant Secretary of the Company, either
manually or by facsimile signature. The Right Certificates shall be
countersigned, either manually or by facsimile, by the Rights Agent and shall
not be valid for any purpose unless so


                                       8

<PAGE>
 
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,
issued and delivered 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 Rights Agreement any such person was not such an
officer.

          (b)   Following the Distribution Date, the Rights Agent will keep or
cause to be kept, at one of its offices designated for such purposes, records
for registration and transfer of the Right Certificates issued hereunder. Such
records 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 date of each of the Right Certificates and the
certificate numbers for each of the Right Certificates.

     6.   Transfer, Split Up, Combination and Exchange of Right Certificates;
          -------------------------------------------------------------------
Mutilated, Destroyed, Lost or Stolen Right Certificates.
- ------------------------------------------------------- 

          (a)   Subject to the provisions of Sections 7(e), 11(a)(ii) and 14(b)
hereof, 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 Certificates (other than Right Certificates representing Rights that have
become void pursuant to Section 11(a)(ii) hereof or that have been exchanged
pursuant to Section 24 hereof) may be (i) transferred or (ii) split up, combined
or exchanged for another Right Certificate or Right Certificates, entitling the
registered holder to purchase a like number of shares of Preferred Stock or
other securities as the Right Certificate or Right Certificates surrendered then
entitled such holder to purchase. Any registered holder desiring to transfer any
Right Certificate shall surrender the Right Certificate at the office of the
Rights Agent designated for such purposes with the form of assignment on the
reverse side thereof duly endorsed (or enclose with such Right Certificate a
written instrument of transfer in form satisfactory to the Company and the
Rights Agent), duly executed by the registered holder thereof or his attorney
duly authorized in writing, and with such signature duly guaranteed by a member
of a securities approved medallion program. Any registered holder desiring to
split up, combine or exchange any Right Certificate shall make such request in
writing delivered to the Rights Agent, and shall surrender the Right Certificate
or Right Certificates to be split up, combined or exchanged at the principal
office of the Rights Agent. Thereupon the Rights Agent shall subject to Sections
4(b), 7(e), 11 and 14 hereof, countersign (by manual or facsimile signature) 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 of a sum sufficient to cover any tax or governmental charge that may be
imposed in connection with any transfer, split up, combination or exchange of
Right Certificates.

          (b)   Subject to the provisions of Section 11(a)(ii) hereof, upon
receipt by the Company and the Rights Agent of evidence reasonably satisfactory
to them of the loss, theft, 


                                       9

<PAGE>
 
destruction or mutilation of a Right Certificate, and, in case of loss, theft or
destruction, of indemnity or security reasonably satisfactory to them, and, if
requested by the Company, reimbursement to the Company of all reasonable
expenses incidental thereto, and upon surrender to the Rights Agent and
cancellation of the Right Certificate if mutilated, the Company will execute and
deliver a new Right Certificate of like tenor to the Rights Agent for delivery
to the registered owner in lieu of the Right Certificate so lost, stolen,
destroyed or mutilated.

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

          (a)   Subject to Section 11(a)(ii) hereof, the Rights shall become
exercisable, and may be exercised to purchase Preferred Stock, except as
otherwise provided herein, 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 on the reverse side thereof duly executed (with such
signature duly guaranteed), to the Rights Agent at the principal office of the
Rights Agent, together with payment of the Purchase Price with respect to each
Right exercised, subject to adjustment as hereinafter provided, at or prior to
the Close of Business on the earlier of (i) January 22, 2009 (the "Final
Expiration Date"), (ii) the time at which the Rights are redeemed as provided in
Section 23 hereof (such date being herein referred to as the "Redemption Date")
or (iii) the time at which all such Rights are exchanged as provided in Section
24 hereof (the earliest of (i), (ii) and (iii) being referred to as the
"Expiration Date").

          (b)   The Purchase Price and the number of shares of Preferred Stock
or other securities or consideration to be acquired upon exercise of a Right
shall be subject to adjustment from time to time as provided in Sections 11 and
13 hereof. The Purchase Price shall be payable in lawful money of the United
States of America, in accordance with Section 7(c) hereof.

          (c)   Except as provided in Section 11(a)(ii) hereof, upon receipt of
a Right Certificate with the form of election to purchase duly executed,
accompanied by payment of the Purchase Price (as such amount may be reduced
pursuant to Section 11(a)(iii) hereof) or so much thereof as is necessary for
the shares to be purchased and an amount equal to any applicable transfer tax,
by cash, certified check or official bank check payable to the order of the
Company or the Rights Agent, the Rights Agent shall, subject to Section 20(k),
thereupon promptly (i) requisition from any transfer agent of the Preferred
Stock (or make available if the Rights Agent is the transfer agent) certificates
for the number of shares of Preferred Stock so elected to be purchased and the
Company will comply and hereby authorizes and directs such transfer agent to
comply with all such requests, (ii) requisition from the Company the amount of
cash to be paid in lieu of issuance of fractional shares in accordance with
Section 14(b) hereof, and (iii) promptly after receipt of such Preferred Stock
certificates 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, when appropriate, after receipt promptly
deliver such cash to or upon the order of the registered holder of such Right
Certificate. In the event of a purchase of securities, other than Preferred
Stock, pursuant to Section 11(a) or Section 13 hereof, the Rights Agent shall
promptly take the appropriate actions corresponding to the foregoing clauses (i)
through (iii). 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(a) hereof, the


                                      10

<PAGE>
 
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.

          (d)   Except as otherwise provided herein, 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 to the
registered holder of such Right Certificate or to his duly authorized assigns,
subject to the provisions of Section 14 hereof.

          (e)   Notwithstanding anything in this Rights Agreement to the
contrary, neither the Rights Agent nor the Company shall be obligated to
undertake any action with respect to a registered holder upon the occurrence of
any purported exercise as set forth in this Section 7 unless such registered
holder shall have (i) completed and signed the certificate contained in the form
of election to purchase set forth on the reverse side of the Right Certificate
surrendered for such exercise and (ii) 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.

     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 Rights Agreement. The Company shall deliver to the
Rights Agent for cancellation and retirement, and the Rights Agent shall so
cancel and retire, any Right Certificate purchased or acquired by the Company
otherwise than upon the exercise thereof. The Rights Agent shall deliver all
canceled Right Certificates to the Company, or shall, at the written request of
the Company, destroy such canceled Right Certificates, and in such case shall
deliver a certificate of destruction thereof to the Company.

     9.   Reservation and Availability of Shares of Preferred Stock.
          --------------------------------------------------------- 

          (a)   The Company covenants and agrees that at all times it will cause
to be reserved and kept available, out of and to the extent of its authorized
and unissued shares of Preferred Stock not reserved for another purpose (and,
following the occurrence of a Triggering Event, other securities) or held in its
treasury, the number of shares of Preferred Stock (and, following the occurrence
of a Triggering Event, other securities) that, as provided in this Rights
Agreement, including Section 11(a)(iii) hereof, will be sufficient to permit the
exercise in full of all outstanding Rights, provided, however, that the Company
                                            -----------------  
shall not be required to reserve and keep available shares of Preferred Stock or
other securities sufficient to permit the exercise in full of all outstanding
Rights pursuant to the adjustments set forth in Section 11(a)(ii), Section
11(a)(iii) or Section 13 hereof unless, and only to the extent that, the Rights
become exercisable pursuant to such adjustments.


                                      11

<PAGE>
 
          (b)   The Company shall (i) use its best efforts to cause, from and
after such time as the Rights become exercisable, the Rights and all shares of
Preferred Stock (and following the occurrence of a Triggering Event, other
securities) issued or reserved for issuance upon exercise thereof to be reported
by the National Association of Securities Dealers, Inc. Automated Quotations
System ("NASDAQ") or such other system then in use, and if the Preferred Stock
shall become listed on any national securities exchange, to cause, from and
after such time as the Rights become exercisable, the Rights and all shares of
Preferred Stock (and, following the occurrence of a Triggering Event, other
securities) issued or reserved for issuance upon exercise thereof to be listed
on such exchange upon official notice of issuance upon such exercise and (ii) if
then necessary, to permit the offer and issuance of such shares of Preferred
Stock (and, following the occurrence of a Triggering Event, other securities),
register and qualify such shares of Preferred Stock (and, following the
occurrence of a Triggering Event, other securities) 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 Expiration Date of
the Rights. The Company may temporarily suspend, for a period of time not to
exceed ninety (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 Rights 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.

          (c)   The Company covenants and agrees that it will take all such
action as may be necessary to ensure that all shares of Preferred Stock (and
following the occurrence of a Triggering Event, 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 in respect thereof), be duly
and validly authorized and issued and fully paid and nonassessable shares in
accordance with applicable law.

          (d)   The Company further covenants and agrees that it will pay when
due and payable any and all federal and state transfer taxes which may be
payable in respect of the issuance or delivery of the Right Certificates or of
any shares of Preferred Stock (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 Preferred Stock (or other securities, as the case may be) upon
exercise of Rights in a name other than that of, the registered holder of the
Right Certificate, and the Company shall not be required to issue or deliver a
Right Certificate or certificate for Preferred Stock (or other securities, as
the case may be) to a person other than such registered holder 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.


                                      12

<PAGE>
 
     10.  Preferred Stock Record Date.  Each Person in whose name any 
          ---------------------------                                    
certificate for shares of Preferred Stock (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 shares of Preferred Stock (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. Prior to the exercise of the Rights evidenced thereby,
the holder of a Right Certificate, as such, shall not be entitled to any rights
of a stockholder of the Company with respect to the shares for which the Rights
shall be exercisable, including, without limitation, the right to vote, to
receive dividends or other distributions or to exercise any preemptive rights,
and shall not be entitled to receive any notice of any proceedings of the
Company, except as provided herein.

     11.  Adjustments to Number and Kind of Shares, Number of Rights or Purchase
          ----------------------------------------------------------------------
Price.  The number and kind of shares subject to purchase upon the exercise of
- -----                                                                         
each Right, the number of Rights outstanding and the Purchase Price are subject
to adjustment from time to time as provided in this Section 11.

          (a)   (i)    In the event the Company shall at any time after the date
of this Rights Agreement (A) declare or pay any dividend on Preferred Stock
payable in shares of Preferred Stock, (B) subdivide or split the outstanding
shares of Preferred Stock into a greater number of shares, (C) combine or
consolidate the outstanding shares of Preferred Stock into a smaller number of
shares or effect a reverse split of the outstanding shares of Preferred Stock,
or (D) issue any shares of its capital stock in a reclassification of the
Preferred Stock (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(a), 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 Preferred Stock or capital stock, as the case may
be, issuable on such date, shall be proportionately adjusted so that the holder
of any Right exercised after such time shall be entitled to receive, upon
payment of the Purchase Price then in effect, the aggregate number and kind of
shares of capital stock or other securities, which, if such Right had been
exercised immediately prior to such date, the holder thereof 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 this Section 11(a)(i) and Section 11(a)(ii)
hereof, the adjustment provided for in this Section 11(a)(i) shall be in
addition to, and shall be made prior to, any adjustment required pursuant to
Section 11(a)(ii).

                (ii)   Subject to Section 24, in the event

                       (A)   any Acquiring Person or any Associate or Affiliate
of any Acquiring Person, at any time after the date of this Rights Agreement,
directly or indirectly, (1) shall consolidate with or merge with and into the
Company or any of its Subsidiaries or otherwise combine with the Company or any
of its Subsidiaries and the Company or such Subsidiary shall be the continuing
or surviving corporation of such consolidation, merger or combination and the
Common Stock of the Company shall remain outstanding and no shares


                                      13

<PAGE>
 
thereof shall be changed into or exchanged for stock or other securities of the
Company or of any other Person or cash or any other property, or (2) shall, in
one or more transactions, other than in connection with the exercise of a Right
or Rights and other than in connection with the exercise or conversion of
securities exercisable for or convertible into securities of the Company or of
any Subsidiary of the Company, transfer any assets or property to the Company or
any of its Subsidiaries in exchange (in whole or in part) for any shares of any
class of capital stock of the Company or any of its Subsidiaries or any
securities exercisable for or convertible into shares of any class of capital
stock of the Company or any of its Subsidiaries, or otherwise obtain from the
Company or any of its Subsidiaries, with or without consideration, any
additional shares of any class of capital stock of the Company or any of its
Subsidiaries or any securities exercisable for or convertible into shares of any
class of capital stock of the Company or any of its Subsidiaries (other than as
part of a pro rata offer or distribution by the Company or such Subsidiary to
all holders of such shares), or (3) shall sell, purchase, lease, exchange,
mortgage, pledge, transfer or otherwise acquire (other than as a pro rata
dividend) or dispose, to, from or with, as the case may be, in one transaction
or a series of transactions, the Company or any of its Subsidiaries, assets
(including securities) on terms and conditions less favorable to the Company or
such Subsidiary than the Company or such Subsidiary would be able to obtain in
arm's-length negotiation with an unaffiliated third party, or (4) shall receive
any compensation from the Company or any of its Subsidiaries for services other
than compensation for employment as a regular or part-time employee, or fees for
serving as a director, at rates in accordance with the Company's (or its
Subsidiary's) past practices, or (5) shall receive the benefit, directly or
indirectly (except proportionately as a stockholder), of any loans, advances,
guarantees, pledges or other financial assistance or any tax credits or tax
advantage provided by the Company or any of its Subsidiaries, or (6) shall
engage in any transaction with the Company (or any of its Subsidiaries)
involving the sale, license, transfer or grant of any right in, or disclosure
of, any patents, copyrights, trade secrets, trademarks, know-how or any other
intellectual or industrial property rights recognized under any country's
intellectual property laws which the Company (including its Subsidiaries) owns
or has the right to use on terms and conditions not approved by the Board; or

                       (B)   any Person, alone or together with its Affiliates
and Associates, shall become an Acquiring Person ; or

                       (C)   that during such time as there is an Acquiring
Person, there shall be any reclassification of securities (including any reverse
stock split), or any recapitalization of the Company, or any merger or
consolidation of the Company with any of its Subsidiaries or any other
transaction or series of transactions involving the Company or any of its
Subsidiaries (whether or not with or into or otherwise involving an Acquiring
Person or any Affiliate or Associate of such Acquiring Person) which has the
effect, directly or indirectly, of increasing by more than 1% the proportionate
share of the outstanding shares of any class of equity securities of the Company
or any of its Subsidiaries, or securities exercisable for or convertible into
equity securities of the Company or any of its Subsidiaries, which is directly
or indirectly beneficially owned by any Acquiring Person or any Affiliate or
Associate of any Acquiring Person, (any of (A), (B) or (C) being referred to
herein as a "Flip-In Event"), then upon the first occurrence of such Flip-In
Event (A) the Purchase Price shall be adjusted to be the


                                      14

<PAGE>
 
Purchase Price in effect immediately prior to the Flip-In Event multiplied by
the number of one-hundredths of a share of Preferred Stock for which a Right was
exercisable immediately prior to such Flip-In Event, whether or not such Right
was then exercisable, and (B) each holder of a Right, except as otherwise
provided in this Section 11(a)(ii) and Section 11(a)(iii) hereof, shall
thereafter have the right to receive, upon exercise thereof at a price equal to
the Purchase Price (as so adjusted), in accordance with the terms of this Rights
Agreement and in lieu of shares of Preferred Stock, such number of shares of
Common Stock as shall equal the result obtained by dividing the Purchase Price
(as so adjusted) by 50% of the Current Market Price per share of the Common
Stock (determined pursuant to Section 11(d) hereof) on the date of such Flip-In
Event; provided, however, that the Purchase Price (as so adjusted) and the
       --------  -------                                                  
number of shares of Common Stock so receivable upon the exercise of a Right
shall, following the Flip-In Event, be subject to further adjustment as
appropriate in accordance with Section 11(f) hereof. Notwithstanding anything in
this Rights Agreement to the contrary, however, from and after the Flip-In
Event, any Rights that are beneficially owned by (x) any Acquiring Person (or
any Affiliate or Associate of any Acquiring Person), (y) a transferee of any
Acquiring Person (or any such Affiliate or Associate) who becomes a transferee
after the Flip-In Event or (z) a transferee of any Acquiring Person (or any such
Affiliate or Associate) who became a transferee prior to or concurrently with
the Flip-In Event pursuant to either (I) a transfer from the Acquiring Person to
holders of its equity securities or to any Person with whom it has any
continuing agreement, arrangement or understanding regarding the transferred
Rights or (II) a transfer which the Board of Directors has determined is part of
a plan, arrangement or understanding which has the purpose or effect of avoiding
the provisions of this paragraph, and subsequent transferees of such Persons,
shall be void without any further action and any holder of such Rights shall
thereafter have no rights whatsoever with respect to such Rights under any
provision of this Rights Agreement. The Company shall use all reasonable efforts
to ensure that the provisions of this Section 11(a)(ii) 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 an Acquiring
Person or its Affiliates, Associates or transferees hereunder. From and after
the Flip-In Event, no Right Certificate shall be issued pursuant to Section 3 or
Section 6 hereof 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.

                (iii)  The Company may at its option substitute for a share of
Common Stock issuable upon the exercise of Rights in accordance with the
foregoing subparagraph (ii) such number or fractions of shares of Preferred
Stock having an aggregate current market value equal to the Current Market Price
of a share of Common Stock. In the event that there shall not be sufficient
shares of Common Stock issued but not outstanding or authorized but unissued to
permit the exercise in full of the Rights in accordance with the foregoing
subparagraph (ii), the Board of Directors shall, to the extent permitted by
applicable law and any material agreements then in effect to which the Company
is a party (A) determine the excess (such excess, the "Spread") of (1) the value
of the shares of Common Stock issuable upon the exercise of a Right in
accordance with the foregoing subparagraph (ii) (the "Current Value") over (2)
the Purchase Price (as adjusted in accordance with the foregoing subparagraph
(ii)), and (B) with respect to each Right (other than Rights which have become


                                      15

<PAGE>
 
void pursuant to the foregoing subparagraph (ii)), make adequate provision to
substitute for the shares of Common Stock issuable in accordance with the
foregoing paragraph (ii) upon exercise of the Right and payment of the Purchase
Price (as adjusted in accordance therewith), (1) cash, (2) a reduction in such
Purchase Price, (3) shares of Preferred Stock or other equity securities of the
Company, including, without limitation, shares or fractions of shares of
preferred stock which, by virtue of having dividend, voting and liquidation
rights substantially comparable to those of the shares of Common Stock, are
deemed in good faith by the Board of Directors to have substantially the same
value as the shares of Common Stock (such shares of Preferred Stock and shares
or fractions of shares of preferred stock being hereinafter referred to as
"Common Stock Equivalents"), (4) debt securities of the Company, (5) other
assets, or (6) any combination of the foregoing, having a value which, when
added to the value of the shares of Common Stock actually issued upon exercise
of such Right, shall have an aggregate value equal to the Current Value (less
the amount of any reduction in such Purchase Price), where such aggregate value
has been determined by the Board of Directors upon the advice of a nationally
recognized investment banking firm selected in good faith by the Board of
Directors; provided, however, that if the Company shall not make adequate
           --------  -------      
provision to deliver value pursuant to clause (B) above within thirty (30) days
following the date of the Flip-In Event (the "Flip-in Trigger Date"), then the
Company shall be obligated to deliver, to the extent permitted by applicable law
and any material agreements then in effect to which the Company is a party, upon
the surrender for exercise of a Right and without requiring payment of such
Purchase Price, shares of Common Stock (to the extent available), and then, if
necessary, such number or fractions of shares of Preferred Stock (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 likely that sufficient additional
shares of Common Stock and/or Common Stock Equivalents could be authorized for
issuance upon exercise in full of the Rights, the thirty (30) day period set
forth above may be extended to the extent necessary, but not more than ninety
(90) days after the Flip-In Trigger Date, in order that the Company may seek
stockholder approval for the authorization of such additional shares or Common
Stock Equivalents (such thirty (30) day period, as it may be extended, being
hereinafter referred to as the "Substitution Period"). To the extent that the
Company determines that some action need be taken pursuant to the second and/or
third sentence of this Section 11(a)(iii), the Company (x) shall provide,
subject to the last sentence of Section 11(a)(ii) hereof, 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 the first sentence of
Section 11(a)(iii) 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(a)(iii), the value of the Common Stock shall be the Current
Market Price per share of the Common Stock on the Flip-In Trigger Date and the
per share or per unit value of any Common Stock Equivalent shall be deemed to
equal the Current Market Price per share of the Common Stock on such date. The
Board of Directors may, but shall not be required to, establish procedures to
allocate the right to receive Common Stock upon the exercise of the Rights among
holders of Rights pursuant to this Section 11(a)(iii).


                                      16

<PAGE>
 
          (b)   In case the Company shall fix a record date for the issuance of
rights (other than the Rights), options or warrants to all holders of Preferred
Stock entitling them to subscribe for or purchase (for a period expiring within
forty-five calendar days after such record date) Preferred Stock, shares having
the same rights, privileges and preferences as the Preferred Stock ("equivalent
preferred stock") or securities convertible into Preferred Stock or equivalent
preferred stock at a price per share of Preferred Stock or equivalent preferred
stock (or having a conversion price per share, if a security convertible into
Preferred Stock or equivalent preferred stock) less than the Current Market
Price per share of Preferred Stock 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 shares of Preferred Stock outstanding
on such record date, plus the number of shares of Preferred Stock which the
aggregate offering price of the total number of shares of Preferred Stock and/or
equivalent preferred stock (and/or the aggregate initial conversion price of the
convertible securities so to be offered) would purchase at such Current Market
Price, and the denominator of which shall be the number of shares of Preferred
Stock outstanding on such record date, plus the number of additional shares of
Preferred Stock and/or equivalent preferred 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 by delivery
of consideration part or all of which may be in a form other than cash, the
value of such non-cash 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 and binding upon the Rights Agent. Shares of Preferred
Stock owned by or held for the account of the Company shall not he deemed
outstanding for the purpose of any such computation. Such adjustment 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.

          (c)   In case the Company shall fix a record date for a distribution
to all holders of Preferred Stock (including any such distribution made in
connection with a consolidation or merger in which the Company is the continuing
corporation) of evidences of indebtedness, cash, assets (other than a dividend
payable in Preferred Stock, but including any dividend payable in stock other
than Preferred Stock) or subscription rights or warrants (excluding those
referred to in Section 11(b) hereof), 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 Market Price per share of Preferred Stock 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 or evidences of
indebtedness so to be distributed or of such subscription rights or warrants
applicable to a share of Preferred Stock and the denominator of which shall be
such Current Market Price per share of Preferred Stock. 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 be adjusted to be the
Purchase Price which would have been in effect if such record date had not been
fixed.


                                      17

<PAGE>
 
          (d)   (i)   For the purpose of any computation hereunder, other than
computations made pursuant to Section 11(a)(iii) hereof, the "Current Market
Price" per share of Common Stock on any date shall be deemed to be the average
of the daily closing prices per share of the Preferred Stock for the thirty
consecutive Trading Days (as defined herein) immediately prior to such date, and
for purpose of computations made pursuant to Section 11(a)(iii) hereof, the
"Current Market Price" per share of the Preferred Stock on any date shall be
deemed to be the average of the daily closing prices per share of the Preferred
Stock for the ten consecutive Trading Days immediately following such date;
provided, however, that in the event that the Current Market Price per
- ----------------- 
share of the Preferred Stock is determined during a period following the
announcement by the issuer of the Preferred Stock of (i) any dividend or
distribution on the Preferred Stock (other than a regular quarterly cash
dividend and other than the Rights), (ii) any subdivision, combination or
reclassification of the Preferred Stock, and prior to the expiration of the
requisite thirty Trading Day or ten Trading Day period, as set forth above,
after the ex-dividend date for such dividend or distribution, or the record date
for such subdivision, combination or reclassification occurs, then, and in each
such case, the Current Market Price shall be properly adjusted to take into
account ex-dividend trading. 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 shares of Common Stock 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 shares of Common Stock are listed or admitted
to trading or, if the shares of Common Stock are not listed or admitted to
trading on any national securities exchange, the last quoted sale 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 shares of Common Stock 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 Common Stock selected by the
Board of Directors of the Company. If on any such date no market maker is making
a market in the Common Stock, the fair value of such shares on such date as
determined in good faith by the Board of Directors of the Company shall be used
and shall be binding on the Rights Agent. The term "Trading Day" shall mean a
day on which the principal national securities exchange on which the shares of
Common Stock are listed or admitted to trading is open for the transaction of
business or, if the shares of Common Stock are not listed or admitted to trading
on any national securities exchange, a Business Day. If the Common Stock is not
publicly held or not so listed or traded, "Current Market Price" per share shall
mean the fair value per share 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 conclusive for all purposes;
 
                (ii)   For the purpose of any computation hereunder, the
"Current Market Price" per share (or one-hundredth of a share) of Preferred
Stock shall be determined in the same manner as set forth above for the Common
Stock in clause (i) of this Section 11(d) (other than the last sentence
thereof). If the Current Market Price per share (or one-hundredth of a share) of
Preferred Stock cannot be determined in the manner provided above or if the


                                      18

<PAGE>
 
Preferred Stock is not publicly held or listed or traded in a manner described
in clause (i) of this Section 11(d), the "Current Market Price" per share of
Preferred Stock 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 Stock occurring after
the date of this Rights Agreement) multiplied by the Current Market Price per
share of the Common Stock and the "Current Market Price" per one-hundredth of a
share of Preferred Stock shall be equal to the Current Market Price per share of
the Common Stock (as appropriately adjusted). If neither the Common Stock nor
the Preferred Stock is publicly held or so listed or traded, "Current Market
Price" per share shall mean the fair value per share 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 conclusive for all
purposes.

          (e)   Anything herein to the contrary notwithstanding, no adjustment
in the Purchase Price shall be required unless such adjustment would require an
increase or decrease of at least one percent in the Purchase Price; provided,
                                                                    ---------
however, that any adjustments which by reason of this Section 11(e) are not
- -------
required to be made shall be carried forward and taken into account in any
subsequent adjustment. All calculations under this Section 11 shall be made to
the nearest cent or to the nearest one hundred-thousandth of a share of Common
Stock or other share or one-hundred-thousandth of a share of Preferred Stock, as
the case may be. Notwithstanding the first sentence of this Section 11(e), any
adjustment required by this Section 11 shall be made no later than the earlier
of (i) three years from the date of the transaction which mandates such
adjustment, or (ii) the Expiration Date.

          (f)   If as a result of an adjustment made pursuant to Section
11(a)(ii) or Section 13(a) hereof, the holder of any Right thereafter exercised
shall become entitled to receive any shares of capital stock other than
Preferred Stock, thereafter the number of such other shares so receivable upon
exercise of any Right and the Purchase Price thereof 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 shares of Preferred Stock
contained in Section 11(a), (b), (c), (e), (g), (h), (i), (j), (k) and (m)
hereof, and the provisions of Sections 7, 9, 10, 13 and 14 hereof with respect
to the Preferred Stock shall apply on like terms to any such other shares.

          (g)   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 shares of Preferred
Stock purchasable from time to time hereunder upon exercise of the Rights, all
subject to further adjustment as provided herein.

          (h)   Unless the Company shall have exercised its election as provided
in Section 11(i), upon each adjustment of the Purchase Price as a result of the
calculations made in Sections 11(b) and (c), 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-hundredths of a
share of Preferred Stock (calculated to the nearest one-hundred-thousandth)
obtained by (i) multiplying (x) the number of one-hundredths of a share of
Preferred Stock covered by a Right immediately prior to this adjustment, by (y)
the Purchase Price in effect


                                      19

<PAGE>
 
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.

          (i)   The Company may elect on or after the date of any adjustment of
the Purchase Price or any adjustment to the number of shares of Preferred Stock
for which a Right may be made pursuant to Section 11(a)(i), 11(b) or 11(c) to
adjust the number of Rights, in lieu of any adjustment in the number of shares
of Preferred Stock purchasable upon the exercise of a Right. Each of the Rights
outstanding after the adjustment in the number of Rights shall be exercisable
for the number of shares of Preferred Stock 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 ten-thousandth) 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 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(i), the Company
shall, 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 hereof, the additional Rights to which such holders shall be
entitled as a result of such adjustment, or, at the option of the Company, shall
cause to be distributed to such holders of record in substitution and
replacement for the Right Certificates held by such holders prior to the date of
adjustment, and upon surrender thereof, if required by the Company, new Right
Certificates evidencing all the Rights to which such holders shall be entitled
after such adjustment. Right Certificates so to be distributed shall be issued,
executed and countersigned in the manner provided for herein (and may bear, at
the option of the Company, the adjusted Purchase Price) and shall be registered
in the names of the holders of record of Right Certificates on the record date
specified in the public announcement.

          (j)   Irrespective of any adjustment or change in the Purchase Price
or the number of shares of Preferred Stock 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 shares which were
expressed in the initial Right Certificate issued hereunder.

          (k)   Before taking any action that would cause an adjustment reducing
the Purchase Price below the then par value, if any, of the shares of Preferred
Stock, Common Stock or other capital stock issuable upon exercise of the Rights,
the Company shall take any corporate action, including using its best efforts to
obtain any required stockholder approvals, which may, in the opinion of its
counsel, be necessary in order that the Company may validly and legally issue
fully paid and nonassessable shares of Preferred Stock, Common Stock or other
capital stock at such adjusted Purchase Price. If upon any exercise of the
Rights, a holder is to receive a combination of Common Stock and Common Stock
Equivalents, a portion of the consideration paid upon such exercise, equal to at
least the then par value of a share of Common Stock of the 


                                      20

<PAGE>
 
Company, shall be allocated as the payment for each share of Common Stock of the
Company so received.

          (l)   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
the shares of Preferred Stock and other capital stock or securities of the
Company, if any, issuable upon such exercise over and above the shares of
Preferred Stock and other capital stock or securities 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 of Preferred Stock and other
capital stock or securities upon the occurrence of the event requiring such
adjustment.

          (m)   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 in their good faith judgment the Board of Directors of the
Company shall determine to be advisable in order that any (i) consolidation or
subdivision of the Preferred Stock, (ii) issuance for cash of any shares of
Preferred Stock at less than the Current Market Price, (iii) issuance for cash
of shares of Preferred Stock or securities which by their terms are convertible
into or exchangeable for shares of Preferred Stock, (iv) stock dividends or (v)
issuance of rights, options or warrants referred to in this Section 11,
hereafter made by the Company to holders of its Preferred Stock shall not be
taxable to such stockholders.

          (n)   The Company covenants and agrees that it shall not, at any time
after the Distribution Date, (i) consolidate with any other Person (other than a
Subsidiary of the Company), (ii) merge with or into any other Person (other than
a Subsidiary of the Company), or (iii) sell or transfer (or permit any
Subsidiary to sell or transfer), in one transaction or a series of related
transactions, assets or earning power aggregating more than 50% 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 and/or any of its Subsidiaries),
if (x) at the time of or immediately after such consolidation, merger or sale
there are any charter or by-law provisions or any rights, warrants or other
instruments or securities outstanding or agreements in effect which
substantially diminish or otherwise eliminate the benefits intended to be
afforded by the Rights or (y) prior to, simultaneously with or immediately after
such consolidation, merger or sale, the stockholders of the Person who
constitutes, or would constitute, the "Principal Party" for purposes of Section
13(a) hereof shall have received a distribution of Rights previously owned by
such Person or any of its Affiliates and Associates. The Company shall not
consummate any such consolidation, merger or sale unless prior thereto the
Company and such other Person shall have executed and delivered to the Rights
Agent a supplemental agreement evidencing compliance with this subsection.

          (o)   The Company covenants and agrees that, after the Distribution
Date, it will not, except as permitted by Section 23, Section 24 or Section 27
hereof, take (or permit any 


                                      21

<PAGE>
 
Subsidiary to take) any action if at the time such action is taken it is
reasonably foreseeable that such action will diminish substantially or eliminate
the benefits intended to be afforded by the Rights.

          (p)   Anything in this Rights Agreement to the contrary
notwithstanding, in the event that the Company shall at any time after the
Record Date and prior to the Distribution Date (i) declare or pay any dividend
on the outstanding shares of Common Stock payable in shares of Common Stock,
(ii) subdivide the outstanding shares of Common Stock, or (iii) combine the
outstanding shares of Common Stock into a smaller number of shares, the number
of Rights associated with each share of Common Stock then outstanding, or issued
or delivered thereafter, shall be proportionately adjusted so that the number of
Rights thereafter associated with each share of Common Stock following any such
event equals the result obtained by multiplying the number of Rights associated
with each share of Common Stock immediately prior to such event by a fraction,
the numerator of which shall be the number of shares of Common Stock outstanding
immediately prior to the occurrence of such event and the denominator of which
shall be the number of shares of Common Stock outstanding immediately following
the occurrence of such event.

     12.  Certification of Adjustments.  Whenever an adjustment is made as 
          ----------------------------                                 
provided in Sections 11 and 13 hereof, the Company shall (a) promptly prepare a
certificate signed by its Chief Executive Officer, its President or any Vice
President and by the Chief Financial Officer or the Secretary of the Company
setting forth such adjustment and a brief statement of the facts giving rise to
such adjustment, (b) promptly file with the Rights Agent and with each transfer
agent for the Preferred Stock and the Common Stock a copy of such certificate
and (c) mail a brief summary thereof to each holder of a Right Certificate (or,
if prior to the Distribution Date, to each holder of a certificate representing
shares of Common Stock) in accordance with Section 26 hereof. Notwithstanding
the foregoing sentence, the failure of the Company to give such notice shall not
affect the validity of or the force or effect of or the requirement for such
adjustment. The Rights Agent shall be fully protected in relying on any
certificate prepared by the Company pursuant to Sections 11 and 13 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. Any
adjustment to be made pursuant to Sections 11 and 13 of this Rights Agreement
shall be effective as of the date of the event giving rise to such adjustment.

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

          (a)   In the event that, following the first occurrence of a Flip-In
Event directly or indirectly, (x) the Company shall consolidate with, or merge
with and into, any other Person or Persons and the Company shall not be the
surviving or continuing corporation of such consolidation or merger, or (y) any
Person or Persons shall consolidate with, or merge with and into, the Company,
and the Company shall be the continuing or surviving corporation of such
consolidation or merger and, in connection with such consolidation or merger,
all or part of the outstanding shares of Common Stock shall be changed into or
exchanged for stock or other securities of any other Person or of the Company or
cash or any other property other than, in the case of the transactions described
in subparagraphs (x) or (y), a merger or consolidation which


                                      22

<PAGE>
 
would result in all of the Voting Power represented by the securities of the
Company outstanding immediately prior thereto continuing to represent (either by
remaining outstanding or by being converted into securities of the surviving
entity) all of the Voting Power represented by the securities of the Company or
such surviving entity outstanding immediately after such merger or consolidation
and the holders of such securities not having changed as a result of such
transactions, or (z) the Company or one or more of its Subsidiaries shall sell,
mortgage or otherwise transfer to any other Person or any Affiliate or Associate
of such Person, in one transaction, or a series of related transactions, assets
or earning power aggregating more than 50% of the assets or earning power of the
Company and its Subsidiaries (taken as a whole), then, on the first occurrence
of any such event (a "Flip-Over Event"), proper provision shall be made so that
(i) each holder of a Right (other than Rights which have become void pursuant to
Section 11(a)(ii) hereof) shall thereafter have the right to receive, upon the
exercise thereof at the Purchase Price (as theretofore adjusted in accordance
with Section 11(a)(ii) hereof), in accordance with the terms of this Rights
Agreement and in lieu of shares of Preferred Stock or Common Stock of the
Company, such number of validly authorized and issued, fully paid, non-
assessable and freely tradeable shares of Common Stock of the Principal Party
(as defined herein), not subject to any liens, encumbrances, rights of first
refusal or other adverse claims, as shall equal the result obtained by dividing
the Purchase Price (as theretofore adjusted in accordance with Section 11(a)(ii)
hereof) by 50% of the Current Market Price per share of the Common Stock of such
Principal Party (determined pursuant to Section 11(d) hereof) on the date of
consummation of such consolidation, merger, sale or transfer; provided, however,
                                                              --------  -------
that the Purchase Price (as theretofore adjusted in accordance with Section
11(a)(ii) hereof) and the number of shares of Common Stock of such Principal
Party so receivable upon exercise of a Right shall be subject to further
adjustment as appropriate in accordance with Section 11(f) hereof to reflect any
events occurring in respect of the Common Stock of such Principal Party after
the occurrence of such consolidation, merger, sale or transfer; (ii) such
Principal Party shall thereafter be liable for, and shall assume, by virtue of
such Flip-Over Event, all the obligations and duties of the Company pursuant to
this Rights Agreement; (iii) the term "Company" for all purposes of this Rights
Agreement shall thereafter be deemed to refer to such Principal Party, it being
specifically intended that the provisions of Section 11 hereof shall only apply
to such Principal Party following the first occurrence of a Flip-Over Event; and
(iv) such Principal Party shall take such steps (including, but not limited to,
the reservation of a sufficient number of shares of its Common Stock in
accordance with Section 9 hereof) in connection with the consummation of any
such transaction as may be necessary to assure that the provisions hereof shall
thereafter be applicable, as nearly as reasonably may be, in relation to its
shares of Common Stock thereafter deliverable upon the exercise of the Rights;
provided, however, that, upon the subsequent occurrence of any merger,
- --------  -------
consolidation, sale of all or substantially all assets, recapitalization,
reclassification of shares, reorganization 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, such cash, shares, rights,
warrants and other property which such holder would have been entitled to
receive had he, at the time of such transaction, owned the shares of Common
Stock of the Principal Party purchasable upon the exercise of a Right, and such
Principal Party shall take such steps (including, but not limited to,
reservation of shares of stock)


                                      23

<PAGE>
 
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.

     (b)  "Principal Party" shall mean:

          (i)   in the case of any transaction described in (x) or (y) of the
first sentence of Section 13(a) hereof, (A) the Person that is the issuer of the
securities into which shares of Common Stock of the Company are converted in
such merger or consolidation, or, if there is more than one such issuer, the
issuer the Common Stock of which has the greatest market value or (B) if no
securities are so issued, (x) the Person that is the other party to the merger
or consolidation and that survives said merger or consolidation, or, if there is
more than one such Person, the Person the Preferred Stock of which has the
greatest market value or (y) if the Person that is the other party to the merger
or consolidation does not survive the merger or consolidation, the Person that
does survive the merger or consolidation (including the Company if it survives);
and

          (ii)  in the case of any transaction described in (z) of the first
sentence in Section 13(a) hereof, 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 as is
the issuer of Common Stock having the greatest aggregate market value of shares
outstanding; provided, however, that in any such case described in the foregoing
             -----------------
paragraphs (b)(i) or (b)(ii), (A) if the Common Stock of such Person is not at
such time and has not been continuously over the preceding 12-month period
registered under Section 12 of the Exchange Act, and such Person is a direct or
indirect Subsidiary of another Person the Common Stock of which is and has been
so registered, the term "Principal Party" shall refer to such other Person, or
(B) if such Person is a Subsidiary, directly or indirectly, of more than one
Person, the Common Stocks 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
the Common Stock having the greatest market value of shares outstanding or (C)
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 (A) and (B) above shall apply to each of
the owners having an interest in the joint venture as if the Person owned by the
joint venture was a Subsidiary of both or all of such joint ventures, and the
Principal Party in each such case shall bear the obligations set forth in this
Section 13 in the same ratio as its interest in such Person bears to the total
of such interests.

     (c)  The Company shall not consummate any consolidation, merger, sale or
transfer referred to in Section 13(a) unless the Principal Party shall have a
sufficient number of authorized shares of its Common Stock that have not been
issued or reserved for issuance to permit the exercise in full of the Rights in
accordance with this Section 13 and unless prior thereto the Company and the
Principal Party involved therein shall have executed and delivered to the Rights
Agent an agreement confirming that the requirements of Sections 13(a) and (b)
hereof shall promptly be performed in accordance with their terms and that such


                                      24

<PAGE>
 
consolidation, merger, sale or transfer of assets shall not result in a default
by the Principal Party under this Rights Agreement as the same shall have been
assumed by the Principal Party pursuant to Sections 13(a) and (b) hereof and
further providing that, as soon as practicable after executing such agreement
pursuant to this Section 13, the Principal Party at its own expense shall:

                (i)     prepare and file a registration statement under the
Securities Act, if necessary, with respect to the Rights and the securities
purchasable upon exercise of the Rights on an appropriate form, use its best
efforts to cause such registration statement to become effective as soon as
practicable after such filing and use its best efforts to cause such
registration statement to remain effective (with a prospectus at all times
meeting the requirements of the Act) until the date of expiration of the Rights,
and similarly comply with applicable state securities laws;

                (ii)    use its best efforts, if the Common Stock of the
Principal Party shall become listed on a national securities exchange, to list
(or continue the listing of) the Rights and the securities purchasable upon
exercise of the Rights on such securities exchange and, if the Common Stock of
the Principal Party shall not be listed on a national securities exchange, to
cause the Rights and the securities purchased upon exercise of the Rights to be
reported by NASDAQ or such other system then in use;

                (iii)   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

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

     In the event that any of the transactions described in Section 13(a) hereof
shall occur at any time after the occurrence of a transaction described in
Section 11(a)(ii) hereof, the Rights which have not theretofore been exercised
shall thereafter be exercisable in the manner described in Section 13(a).

     (d)  Furthermore, in case the Principal Party which is to be a party to a
transaction referred to in this Section 13 has a 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, in connection with, or as a
consequence of, the consummation of a transaction referred to in this Section
13, shares of Common Stock of such Principal Party at less than the then Current
Market Price per share (determined pursuant to Section 11(d) hereof) or
securities exercisable for, or convertible into, Common Stock 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,
tax or similar provisions in connection with the issuance of the Common Stock of
such Principal Party pursuant to the provisions 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


                                      25

<PAGE>
 
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.

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

          (a)   The Company shall not be required to issue fractions of Rights
or to distribute Right Certificates which evidence fractional Rights. In lieu of
such fractional Rights, there shall be paid to the holders of record 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 then current
market value of a whole Right. For the purposes of this Section 14(a), the then
current market value of a Right shall be determined in the same manner as the
Current Market Price of a share of Common Stock shall be determined pursuant to
Section 11(d) hereof.

          (b)   The Company shall not be required to issue fractions of shares
of Preferred Stock (other than fractions which are integral multiples of one-
hundredth of a share of Preferred Stock) upon exercise of the Rights or to
distribute certificates which evidence fractional shares of Preferred Stock
(other than fractions which are integral multiples of one-hundredth of a share
of Preferred Stock). Fractions of shares of Preferred Stock in integral
multiples of one-hundredth of a share of Preferred Stock may, at the election of
the Company, be evidenced by depository receipts, pursuant to an appropriate
agreement between the Company and a depository selected by it, provided that
such agreement shall provide that the holders of such depository receipts shall
have all the rights, privileges and preferences to which they are entitled as
beneficial owners of the shares of Preferred Stock represented by such
depository receipts. In lieu of fractional shares of Preferred Stock that are
not integral multiples of one-hundredth of a share of Preferred Stock, the
Company may pay to the registered holders of Right Certificates at the time such
Rights are exercised as herein provided an amount in cash equal to the same
fraction of the current market value of one-hundredth of a share of Preferred
Stock. For purposes of this Section 14(b), the current market value of one-
hundredth of a share of Preferred Stock shall be the Current Market Price of a
share of Common Stock (as determined pursuant to Section 11(d)(ii) hereof) for
the Trading Day immediately prior to the date of such exercise.

     (c)  Following the occurrence of a Flip-In Event, the Company shall not be
required to issue fractions of shares or units of Common Stock or Common Stock
Equivalents or other securities upon exercise of the Rights or to distribute
certificates which evidence fractional shares of such Common Stock or Common
Stock Equivalents or other securities. In lieu of fractional shares or units of
Common Stock or Common Stock Equivalents or other securities, the Company may
pay to the registered holders of Right Certificates at the time such Rights are
exercised as herein provided an amount in cash equal to the same fraction of the
Current Market Value of a share or unit of Common Stock or Common Stock
Equivalent or other securities. For purposes of this Section 14(c), the Current
Market Value shall be determined in the manner set forth in Section 11(d) hereof
for the Trading Day immediately prior to the date of such exercise


                                      26

<PAGE>
 
and, if such Common Stock Equivalent is not traded, each such Common Stock
Equivalent shall have the value of one-hundredth of a share of Preferred Stock.

     (d)  The holder of a Right by the acceptance of a Right expressly waives
his right to receive any fractional Right or any fractional shares upon exercise
of a Right.

     15.  Rights of Action.  All rights of action in respect of this Rights
          ----------------                                                 
Agreement, other than any rights of action vested in the Rights Agent pursuant
to Sections 18 and 20 below, are vested in the respective holders of record of
the Right Certificates (and, prior to the Distribution Date, the holders of
record of the Common Stock); and any holder of record of any Right Certificate
(or, prior to the Distribution Date, of the Common Stock), 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 Stock), may, in his own behalf and for
his own benefit, enforce, and may institute and maintain any suit, action or
proceeding against the Company or any other Person to enforce, or otherwise 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 Rights
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 Rights Agreement
and, accordingly, that they will be entitled to specific performance of the
obligations under, and injunctive relief against actual or threatened violations
of, the obligations of any Person subject to this Rights Agreement.  Holders of
Rights shall be entitled to recover the reasonable costs and expenses, including
attorneys' fees, incurred by them in any action to enforce the provisions of
this Rights Agreement.
 
     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 not be evidenced
by a Right Certificate and will be transferable only in connection with the
transfer of Common Stock;

          (b)   after the Distribution Date, the Right Certificates will be
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;

          (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 Stock certificate) is registered as the absolute owner thereof
and of the Rights evidenced thereby (notwithstanding any notations of ownership
or writing on the Right Certificate or the associated Common Stock certificate
made by anyone other than the Company or the Rights Agent or the transfer agent
of the Common Stock) for all purposes whatsoever, and neither the Company nor
the Rights Agent shall be affected by any notice to the contrary; and

          (d)   notwithstanding anything in this Rights Agreement to the
contrary, neither the Company nor the Rights Agent shall have any liability to
any holder of a Right or other Person as a result of its inability to perform
any of its obligations under this Rights Agreement


                                      27

<PAGE>
 
by reason of any preliminary or permanent injunction or other order, decree or
ruling issued by a court of competent jurisdiction or by a governmental,
regulatory or administrative agency or commission, or any statute, rule,
regulation or executive order promulgated or enacted by any governmental
authority, prohibiting or otherwise restraining performance of such obligation;
provided, however, that the Company must use its best efforts to have any such
- -----------------
order, decree or ruling lifted or otherwise overturned as soon as possible.

     17.  Right Certificate Holder Not Deemed a Stockholder.  No holder of a 
          -------------------------------------------------      
Right, as such, shall be entitled to vote, receive dividends in respect of or be
deemed for any purpose to be the holder of Common Stock or any other securities
of the Company which may at any time be issuable upon the exercise of the
Rights, 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 in 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 25 hereof), or to receive dividends or subscription rights in respect
of any such stock or securities, or otherwise, until the Right or Rights
evidenced by such Right Certificate shall have been exercised in accordance with
the provisions hereof.

     18.  Concerning the Rights Agent.
          --------------------------- 

          (a)   The Company agrees to pay to the Rights Agent reasonable
compensation for all service rendered by it hereunder 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 Rights
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 gross negligence, bad faith or
willful misconduct on the part of the Rights Agent for any thing done or omitted
to be done by the Rights Agent in connection with the acceptance and
administration of this Rights Agreement, including the cost and expenses of
defending against any claim of liability in the premises. The indemnity provided
herein shall survive the expiration of the Rights and the termination of this
Rights Agreement.

          (b)   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 Rights Agreement in reliance upon any Right
Certificate, certificate for Common Stock or other securities of the Company,
instrument of assignment or transfer, power of attorney, endorsement, affidavit,
letter, notice, direction, consent, certificate, statement or other paper or
document believed by it to be genuine and to be signed, executed and, where
necessary, guaranteed, verified or acknowledged, by the proper Person or
Persons.


                                      28

<PAGE>
 
     19.  Merger or Consolidation or Changed Name of Rights Agent.
          ------------------------------------------------------- 

          (a)   Any corporation into which the Rights Agent or any successor
Rights Agent may be merged or with which it may be consolidated, or any
corporation resulting from any merger or consolidation to which the Rights Agent
or any successor Rights Agent shall be a party, or any corporation 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
Rights 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 would
                                          --------
be eligible for appointment as a successor Rights Agent under the provisions of
Section 21 hereof. In case at the time such successor Rights Agent shall succeed
to the agency created by this Right 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 Rights Agreement.

          (b)   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 such 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
Certificate shall have the full force provided in the Right Certificates and in
this Rights Agreement.

     20.  Duties of Rights Agent.  The Rights Agent undertakes the duties and
          ----------------------   
obligations imposed by this Rights 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:

          (a)   The Rights Agent may consult with legal counsel (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 to be taken by it in good faith and in accordance with such
opinion.

          (b)   Whenever in the performance of its duties under this Rights
Agreement the Rights Agent shall deem it necessary or desirable that any fact or
matter (including, without limitation, the identity of any Acquiring Person and
the determination of "Current Market Price") 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 certificate signed by the
Chairman of the Board, the Chief Executive Officer, the President or any Vice
President and by the Chief Financial Officer or the Secretary or any 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


                                      29

<PAGE>
 
taken or suffered in good faith by it under the provisions of this Rights
Agreement in reliance upon such certificate.

          (c)   The Rights Agent shall be liable hereunder only for its own
gross negligence, bad faith or willful misconduct.

          (d)   The Rights Agent shall not be liable for or by reason of any of
the statements of fact or recitals contained in this Rights Agreement or in the
Right Certificates (except 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.

          (e)   The Rights Agent shall not be under any responsibility in
respect of the validity of this Rights 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 Rights Agreement or in any Right
Certificate; nor shall it be responsible for any adjustment required under the
provisions of Sections 11, 13, 23 or 24 hereof 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 receipt of a
Certificate furnished pursuant to Section 12 describing any such adjustment);
nor shall it by any act hereunder be deemed to make any representation or
warranty as to the authorization or reservation of any shares of Common Stock to
be issued pursuant to this Rights Agreement or any Right Certificate or as to
whether any shares of Common Stock will, when issued, be validly authorized and
issued, fully paid and nonassessable.

          (f)   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 Rights Agreement.

          (g)   The Rights Agent is hereby authorized and directed to accept
instructions with respect to the performance of its duties hereunder from the
Chairman of the Board, the Chief Executive Officer, the President or any Vice
President or the Secretary or any Assistant Secretary or the Chief Financial
Officer of the Company, and to apply to such officers for advice or instructions
in connection with its duties, 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. 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 under this Rights
Agreement and the date on and/or after which such action shall be taken or such
omission shall be effective. Subject to Section 20(c) hereof, the Rights Agent
shall not be liable 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 in such application (which date shall not be less than five Business
Days after the date any officer of the Company actually receives such
application, unless any such officer shall have consented in writing to an
earlier


                                      30

<PAGE>
 
date) unless, prior to taking any such action (or the effective date in the case
of an omission), the Rights Agent shall have received written instructions in
response to such application specifying the action to be taken or omitted.

          (h)   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 the Rights
Agent under this Rights Agreement. Nothing herein shall preclude the Rights
Agent from acting in any other capacity for the Company or for any other entity.

          (i)   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, default, neglect or misconduct of any such attorneys or
agents or for any loss to the Company resulting from any such act, default,
neglect or misconduct, provided reasonable care was exercised in the selection
and continued employment thereof.

          (j)   No provision of this Rights Agreement shall require the Rights
Agent to expend or risk its own funds or otherwise incur any financial liability
in the performance of any of its duties hereunder or in the exercise of its
rights if there shall be reasonable grounds for believing that repayment of such
funds or adequate indemnification against such risk or liability is not
reasonably assured to it.

          (k)   If, with respect to any Right 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 either not been completed or indicates an affirmative
response to clause 1 and/or 2 thereof, the Rights Agent shall not take any
further action with respect to such requested exercise of transfer without first
consulting with the Company.

     21.  Change of Rights Agent.  The Rights Agent or any successor Rights
          ----------------------   
Agent may resign and be discharged from its duties under this Rights Agreement
upon 30 days' notice in writing, or such earlier period as shall be agreed to in
writing, mailed to the Company and to each transfer agent of the Common Stock by
registered or certified mail, and to the holders of the Right Certificates by
first-class mail. The Company may remove the Rights Agent or any successor
Rights Agent (with or without cause) upon 30 days' notice in writing, or such
earlier period as shall be agreed to in writing, mailed to the Rights Agent or
successor Rights Agent, as the case may be, and to each transfer agent of the
Common Stock 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 Company shall appoint a
successor to the Rights Agent. Notwithstanding the foregoing provisions of this
Section 21, in no event shall the resignation or removal of a Rights Agent be
effective until a successor Rights Agent shall have been appointed and have
accepted such appointment. If the Company shall fail to make such appointment
within a period of 30 days after such removal or after it has been


                                      31

<PAGE>
 
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 incumbent Rights Agent or the holder of record 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) a corporation organized and doing business under the
laws of the United States or any State thereof, in good standing, which is
authorized under such laws to exercise corporate trust or stock transfer 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 $50,000,000 or (b) an Affiliate controlled by a corporation
described in clause (a) of this sentence. After appointment, the successor
Rights Agent shall be vested with the same powers, rights, duties and
responsibilities as if it had been originally named as Rights Agent without
further act or deed; but the predecessor Rights Agent shall deliver and transfer
to the successor Rights Agent any property at the time held by it hereunder, and
execute and deliver any further assurance, conveyance, act or deed necessary for
the purpose. Not later than the effective date of any such appointment the
Company shall file notice thereof in writing with the predecessor Rights Agent
and each transfer agent of the Common Stock, and 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.

     22.  Issuance of New Right Certificates.  Notwithstanding any of the
          ----------------------------------   
provisions of this Rights 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 per share and the number or kind or class of
shares of stock or other securities or property purchasable under the Right
Certificates made in accordance with the provisions of this Rights Agreement. In
addition, in connection with the issuance or sale of shares of Common Stock
following the Distribution Date and prior to the redemption or expiration of the
Rights, the Company shall, with respect to shares of Common Stock so issued or
sold pursuant to the exercise of stock options or under any employee plan or
arrangement, or upon the exercise, conversion or exchange of securities
hereinafter issued by the Company, issue Right Certificates representing the
appropriate number of Rights in connection with such issuance or sale; provided,
                                                                       --------
however, that (i) no such Right Certificate shall be issued if, and to the
- -------
extent that, the Company shall be advised by counsel that such issuance would
create a significant risk of material adverse tax consequences to the Company or
the Person to whom such Right Certificate would be issued, and (ii) no such
Right Certificate shall be issued, if, and to the extent that, appropriate
adjustment shall otherwise have been made in lieu of the issuance thereof.

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

          (a)   The Board of Directors of the Company may, at its option, at any
time prior to the earlier of (x) the first occurrence of a Flip-In Event or (y)
the Close of Business on the Expiration Date, redeem all but not less than all
the then outstanding Rights at a redemption


                                      32

<PAGE>
 
price of $0.001 per Right, as such amount may be appropriately adjusted to
reflect any stock split, stock dividend or similar transaction occurring after
the Record Date (such redemption price being hereinafter referred to as the
"Redemption Price").
 
          (b)   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. The Company shall promptly give public
notice of any such redemption; provided, however, that the failure to give, or
                               --------  -------
any defect in, any such notice shall not affect the validity of such redemption.
Within (10) days after such action of the Board of Directors ordering the
redemption of the Rights (or such later time as the Board of Directors may
establish for the effectiveness of such redemption), the Company shall mail a
notice of redemption to all the holders of the then outstanding Rights 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 Stock. 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. The failure to give notice required by this Section 23(b) or
any defect therein shall not affect the legality or validity of the action taken
by the Company.

     (c)  In the case of a redemption permitted under Section 23(a), the Company
may, at its option, discharge all of its obligations with respect to the Rights
by (i) issuing a press release announcing the manner of redemption of the Rights
and (ii) mailing payment of the Redemption Price to the registered holders of
the Rights at their last addresses as they appear on the registry books of the
Rights Agent or, prior to the Distribution Date, on the registry books of the
transfer agent of the Common Stock, and upon such action, all outstanding Right
Certificates shall be null and void without any further action by the Company.

     24.  Exchange of Rights for Common Stock.
          ----------------------------------- 

          (a)   The Board of Directors of the Company may, at its option, at any
time after the occurrence of a Flip-In Event, exchange all or part of the then
outstanding and exercisable Rights (which (i) shall not include Rights that have
become void pursuant to the provisions of Section 11(a)(ii) and (ii) shall
include, without limitation, any Rights issued after the Distribution Date in
accordance with Section 22) for shares of Common Stock at an exchange ratio of
one share of Common Stock per Right, appropriately adjusted to reflect any stock
split, stock dividend or similar transaction occurring after the Record Date
(such exchange ratio being hereinafter referred to as the "Exchange Ratio");
provided, however, that the Board of Directors shall not be empowered to effect
such exchange at any time after any Person (other than an Exempt Person),
together with all Affiliates and Associates of such Person, becomes the
Beneficial Owner of shares of Common Stock aggregating 50% or more of the shares
of Common Stock then outstanding. From and after the occurrence of an event
specified in Section 13(a) hereof, any Rights that theretofore have not been
exchanged pursuant to this Section 24(a)


                                      33

<PAGE>
 
shall thereafter be exercisable only in accordance with Section 13 and may not
be exchanged pursuant to this Section 24(a).

          (b)   Immediately upon the action of the Board of Directors of the
Company ordering the exchange of any Rights pursuant to subsection (a) of this
Section 24 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 that number of shares of Common Stock equal
to the number of such Rights held by such holder multiplied by the Exchange
Ratio. 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 will state the
method by which the exchange of the shares of Common Stock 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 Rights which have become void pursuant to the
provisions of Section 11(a)(ii) hereof) held by each holder of Rights.

          (c)   In any exchange pursuant to this Section 24, the Company, at its
option, may substitute, and, in the event that there shall not be sufficient
shares of Common Stock issued but not outstanding or authorized but unissued to
permit any exchange of Rights as contemplated in accordance with this Section
24, the Company shall substitute to the extent of such insufficiency, for each
share of Common Stock that would otherwise be issuable upon exchange of a Right,
a number of shares of Preferred Stock or fractions thereof (or equivalent
preferred shares, as such term is defined in Section 11(b)) having an aggregate
current per share market price (determined pursuant to Section 11(d) hereof)
equal to the current per share market price of one share of Common Stock
(determined pursuant to Section 11(d) hereof) as of the date of the Flip-In
Event.

          (d)   In the event that there shall not be sufficient shares of Common
Stock issued but not outstanding or authorized but unissued to permit any
exchange of Rights as contemplated in accordance with this Section 24, the
Company shall take all such action as may be necessary to authorize additional
shares of Common Stock for issuance upon exchange of the Rights.

          (e)   The Company shall not be required to issue fractions of shares
of Common Stock or to distribute certificates which evidence fractional shares
of Common Stock. In lieu of such fractional shares of Common Stock, the Company
shall pay to the registered holders of the Right Certificates with regard to
which such fractional shares of Common Stock would otherwise be issuable an
amount in cash equal to the same fraction of the current market value of a whole
share of Common Stock. For the purposes of this paragraph (d), the current
market value of a whole share of Common Stock shall be the Current Market Price
of a share of Common Stock (as defined in Section 11(d) hereof for the purposes
of computations made other


                                      34

<PAGE>
 
than pursuant to Section 11(a)(iii)) for the Trading Day immediately prior to
the date of exchange pursuant to this Section 24.

     25.  Notice of Proposed Actions.
          -------------------------- 

          (a)   In case the Company, after the Distribution Date, shall propose
(i) to effect any of the transactions referred to in Section 11(a)(i) or to pay
any dividend to the holders of record of its Preferred Stock payable in stock of
any class or to make any other distribution to the holders of record of its
Preferred Stock (other than a regular periodic cash dividend), or (ii) to offer
to the holders of record of its Preferred Stock, Common Stock or options,
warrants, or other rights to subscribe for or to purchase shares of Preferred
Stock (including any security convertible into or exchangeable for Preferred
Stock) or shares of stock of any other class or any other securities, options,
warrants, convertible or exchangeable securities or other rights, or (iii) to
effect any reclassification of its Preferred Stock or any recapitalization or
reorganization of the Company, or (iv) to effect any consolidation or merger
with or into, 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 more than 50% of the assets or earning power of the Company and
its Subsidiaries (taken as a whole) to, any other Person or Persons, or (v) to
effect the liquidation, dissolution or winding up of the Company, then, in each
such case, the Company shall give to each holder of record of a Right
Certificate, in accordance with Section 26 hereof, notice of such proposed
action, which shall specify the record date for the purposes of such transaction
referred to in Section 11(a)(i), or such dividend or distribution, or the date
on which such reclassification, recapitalization, reorganization, consolidation,
merger, sale or transfer of assets, liquidation, dissolution or winding up is to
take place and the record date for determining participation therein by the
holders of record of Preferred Stock, if any such date is to be fixed, and such
notice shall be so given in the case of any action covered by clause (i) or (ii)
above at least 10 days prior to the record date for determining holders of
record of the Preferred Stock for purposes of such action, and in the case of
any such other action, at least 10 days prior to the date of the taking of such
proposed action or the date of participation therein by the holders of record of
Preferred Stock, whichever shall be the earlier.

          (b)   In case any of the transactions referred to in Section 11(a)(ii)
or Section 13 of this Rights Agreement are proposed, then, in any such case, the
Company shall give to each holder of Rights, in accordance with Section 26
hereof, notice of the proposal of such transaction at least 10 days prior to
consummating such transaction, which notice shall specify the proposed event and
the consequences of the event to holders of Rights under Section 11(a)(ii) or
Section 13 hereof, as the case may be, and, upon consummating such transaction,
shall similarly give notice thereof to each holder of Rights.

          (c)   The failure to give notice required by this Section 25 or any
defect therein shall not affect the legality or validity of the action taken by
the Company or the vote upon any such action.

     26.  Notices.  Notices or demands authorized by this Rights Agreement to be
          -------   
given or made by the Rights Agent or by the holder of record of any Right
Certificate or Right to or on 


                                      35

<PAGE>
 
behalf of 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:

     IKOS Systems, Inc.
     19050 Pruneridge Avenue
     Cupertino, CA  95014
     Attention:  Secretary

     Subject to the provisions of Section 20 hereof, any notice or demand
authorized by this Rights Agreement to be given or made by the Company or by the
holder of record of any Right Certificate or Right 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:

     Bank Boston, N.A.
     c/o Boston EquiServe Limited Partnership
     150 Royall Street
     Canton, MA  02021
     Attention:  Client Administration

     Notices or demands authorized by this Rights Agreement to be given or made
by the Company or the Rights Agent to the holder of record of any Right
Certificate or Right 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
it appears upon the registry books of the Rights Agent or, prior to the
Distribution Date, on the registry books of the Transfer Agent.

     27.  Supplements and Amendments.  Except as provided in the penultimate 
          --------------------------   
sentence of this Section 27, 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 Rights
Agreement in any respect without the approval of any holders of the Rights. At
any time when the Rights are no longer redeemable, except as provided in the
penultimate sentence of this Section 27, the Company may, and the Rights Agent
shall, if the Company so directs, supplement or amend this Rights Agreement
without the approval of any holders of Right Certificates in order to (i) cure
any ambiguity, (ii) correct or supplement any provision contained herein which
may be defective or inconsistent with any other provisions herein, (iii) shorten
or lengthen any time period hereunder, or (iv) change or supplement the
provisions hereunder in any manner which the Company may deem necessary or
desirable; provided 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 amendment may
cause the Rights again to become redeemable or cause the Rights Agreement again
to become amendable other than in accordance with this sentence. Notwithstanding
anything contained in this Rights Agreement to the contrary, no supplement or
amendment shall be made which changes the Redemption Price. Prior to the
Distribution Date, the interests of the holders of Rights shall be deemed
coincident with the interests of the holders of Common Stock.


                                      36

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

     29.  Benefits of this Rights Agreement.  Nothing in this Rights 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 Stock) any legal or equitable right,
remedy or claim under this Rights Agreement; but this Rights Agreement shall be
for the sole and exclusive benefit of the Company, the Rights Agent and the
holders of record of the Right Certificates (and, prior to the Distribution
Date, the Common Stock).

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

     31.  Counterparts.  This Rights 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.

     32.  Descriptive Headings.  Descriptive headings of the several sections 
          --------------------   
of this Rights Agreement are inserted for convenience only and shall not control
or affect the meaning or construction of any of the provisions hereof.

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


                                      37

<PAGE>
 
     IN WITNESS WHEREOF, the parties hereto have caused this Rights Agreement to
be duly executed, and their seals affixed and attested, all as of the date first
above written.

[SEAL]                                      

ATTEST:                                     IKOS SYSTEMS, INC.


By: /s/ Joseph W. Rockom                    By: /s/ Ramon Nunez
   -------------------------------             -------------------------------
    Name: Joseph W. Rockom                      Name: Ramon Nunez
    Title: Secretary                            Title: President and Chief 
                                                Executive Officer

[SEAL]

ATTEST:                                     BANK BOSTON, N.A.


By: /s/ Kevin M. Breen                      By: /s/ Carol Mulvey-Eori
   -------------------------------             -------------------------------
    Name: Kevin M. Breen                        Name:  Carol Mulvey-Eori
    Title: Account Manager                      Title: Administration Manager





                                      38

<PAGE>
 
                                   EXHIBIT A

                          CERTIFICATE OF DESIGNATION
                                        


<PAGE>
 
                              IKOS SYSTEMS, INC.

                                        
                                  CERTIFICATE
                    OF DESIGNATION, PREFERENCES AND RIGHTS
                              OF THE TERMS OF THE
                           SERIES G PREFERRED STOCK
                                        

     Pursuant to Section 151 of the General Corporation Law of the State of
Delaware


     We, Gerald S. Casilli, Chairman of the Board and Chief Executive Officer,
and Joseph W. Rockom, Assistant Secretary, of IKOS Systems, Inc., organized and
existing under the General Corporation Law of the State of Delaware, in
accordance with the provisions of Section 103 thereof, DO HEREBY CERTIFY:

     That pursuant to the authority conferred upon the Board of Directors by the
Certificate of Incorporation of the said Corporation, the said Board of
Directors on January 23, 1992, adopted the following resolution creating a
series of 500,000 shares of Preferred Stock designated as Series G Preferred
Stock:

     RESOLVED, that pursuant to the authority vested in the Board of Directors
of this Corporation in accordance with the provisions of its Certificate of
Incorporation, a series of Preferred Stock of the Corporation be and it hereby
is created, and that the designation and amount thereof and the powers,
preferences and relative, participating, optional and other special rights of
the shares of such series, and the qualifications, limitations or restrictions
thereof are as follows:

     1.   Designation and Amount.  The shares of such series shall be designated
          ----------------------   
as "Series G Preferred Stock" (the "Series G Preferred Stock"), $0.01 par value
per share, and the number of shares constituting such series shall be 500,000.

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

          (a)   The dividend rate on the shares of Series G Preferred Stock
shall be for each quarterly dividend (hereinafter referred to as a "quarterly
dividend period"), which quarterly dividend periods shall commence on October 1,
January 1, April 1 and July 1, in each year (each such date being referred to
herein as a "Quarterly Dividend Payment Date") (or in the case of original
issuance, from the date of original issuance) and shall end on and include the
day next preceding the first date of the next quarterly dividend period, at a
rate per quarterly dividend period (rounded to the nearest cent) equal to the
greater of (a) $25.00 or (b) subject to the provisions 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 cash, based
upon the fair market value at the time the non-cash dividend or other
distribution is declared as determined in good faith by the Board of Directors)
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
<PAGE>
 
Common Stock (by reclassification or otherwise), declared (but not withdrawn) on
the Common Stock, par value $.01 per share, of the Corporation (the "Common
Stock") during the immediately preceding quarterly dividend period, or, with
respect to the first quarterly dividend period, since the first issuance of any
share or fraction of a share of Series G Preferred Stock. In the event this
Company shall at any time after February 10, 1992 (the "Rights Declaration
Date") (i) declare any dividend on Common Stock payable in shares of Common
Stock, (ii) subdivide the outstanding Common Stock, or (iii) combine the
outstanding Common Stock into a smaller number of shares, then in each such case
the amount to which holders of shares of Series G Preferred Stock were entitled
immediately prior to such event under clause (b) of the preceding sentence shall
be adjusted by multiplying such amount by a fraction the numerator of which is
the number of shares of Common Stock outstanding immediately after such event
and the denominator of which is the number of shares of Common Stock that were
outstanding immediately prior to such event.

          (b)   Dividends shall begin to accrue and be cumulative on outstanding
shares of Series G Preferred Stock from the Quarterly Dividend Payment Date next
preceding the date of issue of such shares of Series G Preferred Stock, 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 G Preferred 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 G Preferred Stock in
an amount less than the total amount of such dividends at the time accrued and
payable on such shares shall be allocated pro rata on a share-by-share basis
among all such shares at the time outstanding. The Board of Directors may fix a
record date for the determination of holders of shares of Series G Preferred
Stock entitled to receive payment of a dividend or distribution declared
thereon, which record date shall be no more than 45 days prior to the date fixed
for the payment thereof.

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

          (a)   Subject to the provision for adjustment hereinafter set forth,
each share of Series G Preferred Stock shall entitle the holder thereof to 100
votes on all matters submitted to a vote of the stockholders of the Corporation.
In the event the Corporation shall at any time after the Rights Declaration Date
(i) declare any dividend on Common Stock payable in shares of Common Stock, (ii)
subdivide the outstanding Common Stock, or (iii) combine the outstanding Common
Stock into a smaller number of shares, then in each such case the number of
votes per share to which holders of shares of Series G Preferred Stock were
entitled immediately prior to such event shall be adjusted by multiplying such
number by a fraction the numerator of which is the number of shares of Common
Stock outstanding immediately after such event and the denominator of which is
the number of shares of Common Stock that were outstanding immediately prior to
such event.


                                       2
<PAGE>
 
          (b)   Except as otherwise provided herein, in the Certificate of
Incorporation or by law, the holders of shares of Series G Preferred Stock and
the holders of shares of Common Stock shall vote together as one class on all
matters submitted to a vote of stockholders of the Corporation.

          (c)   Except as set forth herein, in the Certificate of Incorporation
and in the By-laws, holders of Series G Preferred Stock shall have no special
voting rights and their consent shall not be required (except to the extent they
are entitled to vote with holders of Common Stock as set forth herein) for
taking any corporate action.

     4.   Reacquired Shares.  Any shares of Series G Preferred Stock purchased
          -----------------   
or otherwise acquired by the Corporation in any manner whatsoever shall be
retired and cancelled promptly after the acquisition thereof. All such shares
shall upon their cancellation become authorized but unissued shares of Preferred
Stock and may be reissued as part of a new series of Preferred Stock to be
created by resolution or resolutions of the Board of Directors, subject to the
conditions and restrictions on issuance set forth herein.

     5.   Liquidation, Dissolution or Winding Up.
          -------------------------------------- 

          (a)   In the event of any voluntary or involuntary liquidation,
dissolution or winding up of the Corporation, the holders of the Series G
Preferred Stock shall be entitled to receive the greater of (a) $1,000.00 per
share, plus accrued dividends to the date of distribution, whether or not earned
or declared, or (b) an 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 Common Stock. In the event the Corporation shall at any
time after the Rights Declaration Date (i) declare any dividend on Common Stock
payable in shares of Common Stock, (ii) subdivide the outstanding Common Stock,
or (iii) combine the outstanding Common Stock into a smaller number of shares,
then in each such case the amount to which holders of shares of Series G
Preferred Stock were entitled immediately prior to such event pursuant to 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.

     6.   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 the shares of Series G
Preferred Stock shall at the same time be similarly exchanged or changed in an
amount per share (subject to the provision for adjustment hereinafter set forth)
equal to 100 times the aggregate amount of stock, securities, cash and/or 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 after the Rights Declaration Date (i) declare any dividend on
Common Stock payable in shares of Common Stock, (ii) subdivide the outstanding
Common Stock, or (iii) combine the outstanding Common Stock into a smaller
number of shares, then in each such case the amount set forth in the


                                       3
<PAGE>
 
preceding sentence with respect to the exchange or change of shares of Series G
Preferred Stock shall be adjusted by multiplying such amount by a fraction the
numerator of which is the number of shares of Common Stock outstanding
immediately after such event and the denominator of which is the number of
shares of Common Stock that were outstanding immediately prior to such event.

     7.   No Redemption.  The shares of Series G Preferred Stock shall not be
          -------------                                                      
redeemable.

     8.   Fractional Shares.  Series G Preferred Stock may be issued in
          -----------------   
fractions of a share which shall entitle the holder, in proportion to such
holder's fractional shares, to exercise voting rights, receive dividends,
participate in distributions and have the benefit of all other rights of holders
of Series G Preferred Stock. All payments made with respect to fractional shares
hereunder shall be rounded to the nearest whole cent.

     9.   Certain Restrictions.
          -------------------- 

          (a)   Whenever quarterly dividends or other dividends or distributions
payable on the Series G Preferred Stock as provided in Section 2 are in arrears,
thereafter and until all accrued and unpaid dividends and distributions, whether
or not declared, on shares of Series G Preferred Stock outstanding shall have
been paid in full, the Corporation shall not:

                (i)    declare or pay dividends on, make any other distributions
on, or redeem or purchase or otherwise acquire for consideration any shares of
stock ranking junior (either as to dividends or upon liquidation, dissolution or
winding up) to the Series G Preferred Stock;

                (ii)   declare or pay dividends on 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 G Preferred
Stock, except dividends paid ratably on the Series G Preferred Stock and all
such parity stock on which dividends are payable or in arrears in proportion to
the total amounts to which the holders of all such shares are then entitled;

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

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


                                       4
 
<PAGE>
 
          (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 9, purchase or otherwise acquire such shares at such time and in
such manner.

     10.  Ranking.  The Series G Preferred Stock shall be junior to all other
          -------                                                            
Series of the Corporation's preferred stock as to the payment of dividends and
the distribution of assets, unless the terms of any series shall provide
otherwise.

     11.  Amendment.  The Certificate of Incorporation of the Corporation shall
          ---------       
not be amended in any manner which would materially alter or change the powers,
preferences or special rights of the Series G Preferred Stock so as to affect
them adversely without the affirmative vote of the holders of two-thirds or more
of the outstanding shares of Series G Preferred Stock voting together as a
single class.

     IN WITNESS WHEREOF, we have executed and subscribed this Certificate and do
affirm the foregoing as true under the penalties of perjury this ____ day of
February, 1992.



                                       ----------------------------------------
                                       Gerald S. Casilli, Chairman of the Board 
                                       and Chief Executive Officer


Attest:



- ------------------------------------- 
Joseph W. Rockom, Assistant Secretary



                                        
                                       5
 
PA\836037.4
1090303-903400
<PAGE>
 
                                   EXHIBIT B

                              RIGHTS CERTIFICATE


<PAGE>
 
                          [Form of Right Certificate]

Certificate No. W-                                         _____________Rights

     NOT EXERCISABLE AFTER JANUARY 22, 2009, OR EARLIER IF REDEEMED OR
     EXCHANGED. AT THE OPTION OF THE COMPANY, THE RIGHTS MAY BE REDEEMED AT
     $.001 PER RIGHT OR EXCHANGED FOR COMMON STOCK ON THE TERMS SET FORTH IN THE
     RIGHTS AGREEMENT. IN THE EVENT THAT THE RIGHTS REPRESENTED BY THIS
     CERTIFICATE ARE ISSUED TO A PERSON WHO IS AN ACQUIRING PERSON OR A
     TRANSFEREE OF THE RIGHTS PREVIOUSLY OWNED BY SUCH PERSONS, THIS RIGHT
     CERTIFICATE AND THE RIGHTS REPRESENTED HEREBY MAY BE SUBJECT TO CERTAIN
     LIMITATIONS IN THE CIRCUMSTANCES SPECIFIED IN SECTION 11(a)(ii) AND SECTION
     24 OF THE RIGHTS AGREEMENT.

                               RIGHT CERTIFICATE

                               IKOS SYSTEMS, INC.

     This certifies that _________________ , or registered assigns, is the
registered owner of the number of Rights set forth above, each of which entitles
the owner thereof, subject to the terms, provisions and conditions of the
Amended and Restated Rights Agreement dated as of January 22, 1999 ("Rights
Agreement") between IKOS Systems, Inc., a Delaware corporation ("Company"), and
BankBoston, N.A. ("Rights Agent"), to purchase from the Company at any time
after the Distribution Date (as such term is defined in the Rights Agreement)
and prior to 5:00 p.m. (Eastern time) on January 22, 2009, at the principal
office of the Rights Agent, or its successors as Rights Agent, designated for
such purposes, one-hundredth of a fully paid and nonassessable share of Series G
Preferred Stock of the Company ("Preferred Stock") at a purchase price of $30.00
per one-hundredth of a share, as the same may from time to time be adjusted in
accordance with the Rights Agreement ("Purchase Price"), upon presentation and
surrender of this Right Certificate with the Form of Election to Purchase duly
executed.

     As provided in the Rights Agreement, the Purchase Price and the number of
shares of Preferred Stock or other securities 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 and, upon the
happening of certain events, securities other than shares of Preferred Stock, or
other property, may be acquired upon exercise of the Rights evidenced by this
Right Certificate, as provided by the Rights Agreement.

     This Right Certificate is subject to all the terms, provisions and
conditions of the Rights Agreement, which terms, provisions and conditions are
incorporated herein by reference and made a part hereof and to which Rights
Agreement reference is hereby made for a full description of the rights,
limitations of rights, obligations, duties and immunities of the Rights Agent,
the Company and the holders of record of the Right Certificates.  Copies of the
Rights Agreement are on file at the principal executive office of the Company.
<PAGE>
 
     This Right Certificate, with or without other Right Certificates, upon
surrender at the principal office of the Rights Agent, may be exchanged for
another Right Certificate or Right Certificates of like tenor and date
evidencing Rights entitling the holder of record to purchase a like aggregate
number of shares of Preferred Stock 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 Rights Agreement, at any time prior to the
earlier of (i) the occurrence of a Stock Acquisition Date (as such term is
defined in the Rights Agreement) or (ii) the Final Expiration Date, the Rights
evidenced by this Certificate may be redeemed by the Company at its option at a
redemption price of $.00l per Right of exchanged by the Company at its option in
whole or in part for shares of Common Stock.  The Company may redeem all but not
less than all of the then outstanding Rights at the Redemption Price following
the occurrence of a Stock Acquisition Date but prior to any Flip-Over Event (as
such term is defined in the Rights Agreement) in connection with a Flip-Over
Event in which all holders of Common Stock are treated alike and not involving
(other than as a holder of Common Stock being treated like all other holders) an
Acquiring Person or an Affiliate or Associate (as such terms are defined in the
Rights Agreement) of an Acquiring Person or any other Person or Person in which
such Acquiring Person, Affiliate or Associate has an interest, in the aggregate,
in excess of five percent of such Person, or any other Person or Persons acting
directly or indirectly on behalf of or in association with any such Acquiring
Person, Affiliate or Associate.

     No fractional shares of Preferred Stock shall be issued upon the exercise
of any Right or Rights evidenced hereby (other than fractions which are integral
multiples of one-hundredth of a share of Preferred Stock, which may, at the
option of the Company, be evidenced by depositary receipts), and no fractional
shares of Common Stock will be issued upon the exchange of any Right or Rights
evidenced hereby, and in lieu thereof, as provided in the Rights Agreement,
fractions of shares of Preferred Stock or Common Stock shall receive an amount
in cash equal to the same fraction of the then Current Market Price (as such
term is defined in the Rights Agreement) of a share of Preferred Stock or Common
Stock, as the case may be.

     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 Common Stock 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 Rights 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 in 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 (other than certain actions specified in
the Rights Agreement) or to receive dividends or subscription rights, or
otherwise, until the Right or Rights evidenced by this Right Certificate shall
have been exercised or exchanged as provided in the Rights Agreement.


                                       2
<PAGE>
 
        This Right Certificate shall not be valid or obligatory for any purpose
until it shall have been countersigned by the Rights Agent.


                                       3
<PAGE>
 
     WITNESS the facsimile signature of the proper officers of the Company and
its corporate seal.

     
     Dated as of____________, 19___.


ATTEST:                                   IKOS Systems, Inc.
 
 
 
____________________________________      By:_________________________________
 
                                          Title:______________________________
 
 
 
COUNTERSIGNED:                            BankBoston, N.A.
                                          As Rights Agent
 
 
                                          By:_________________________________
                                              Authorized Signature


                                       4

<PAGE>
 
                   Form of Reverse Side of Right Certificate

                              FORM OF ASSIGNMENT

            (To be executed by the registered holder if such holder
                 desires to transfer any or all of the Rights
                    represented by this Right Certificate)

FOR VALUE RECEIVED, the undersigned hereby sells, assigns and transfers unto

________________________________________________________________________________

________________________________________________________________________________
                  (Name, address and social security or other
                       identifying number of transferee)

___________________________________ (____________________) of the Rights
represented by this Right Certificate, together with all right, title and
interest in and to said Rights, and hereby irrevocably constitutes and appoints 
_________________________________ attorney to transfer said Rights on the 
books of the within-named Company with full power of substitution.


     Dated:________________, 19__           _____________________________
                                            (Signature)

Signature Guaranteed:


                                  CERTIFICATE
                                  -----------

     The undersigned hereby certifies by checking the appropriate boxes that:

     (1)   the rights evidenced by this Right Certificate [  ] are [  ] are not
being sold, assigned and transferred by or an behalf of a Person who is or was
an Acquiring Person (as such capitalized terms are defined in the Rights
Agreement);

     (2)   after due inquiry and to the best knowledge of the undersigned, it 
[ ] did [ ] did not acquire the Rights evidenced by this Right Certificate from
any Person who is or was an Acquiring Person or an Affiliate or Associate of an
Acquiring Person or any transferee of such Persons.


     Dated:________________, 19__           _____________________________
                                            (Signature)

Signature Guaranteed:
<PAGE>
 
                   Form of Reverse Side of Right Certificate
                                  (continued)


                                    NOTICE
                                    ------

     The signatures to the foregoing Assignment and the foregoing Certificate,
if applicable, must correspond to the name as written upon the face of this
Right Certificate in every particular, without alteration or enlargement or any
change whatsoever, and must be guaranteed by a member firm of a registered
national securities exchange, a member of the National Association of Securities
Dealers, Inc., or a commercial bank or trust company having an office or
correspondent in the United States.

     In the event that the foregoing Certificate is not duly executed, with
signature guaranteed, the Company may deem the Rights represented by this Right
Certificate to be Beneficially Owned by an Acquiring Person or an Affiliate or
Associate of an Acquiring Person (as such capitalized terms are defined in the
Rights Agreement), and not issue any Right Certificate or Right Certificates in
exchange for this Right Certificate.
<PAGE>
 
                     Form of Reverse of Right Certificate
                                  (continued)

                         FORM OF ELECTION TO PURCHASE

            (To be executed by the registered holder if such holder
                 desires to exercise any or all of the Rights
                    represented by this Right Certificate)

To IKOS Systems, Inc.:

     The undersigned hereby irrevocably elects to exercise _____________
(_______________) of the Rights represented by this Right Certificate to
purchase the shares of the Common Stock of the Company, or other securities or
property issuable upon the exercise of said number of Rights pursuant to the
Rights Agreement.

     The undersigned hereby requests that a certificate for any such securities
and any such property be issued in the name of and delivered to:

________________________________________________________________________________

________________________________________________________________________________
                  (Name, address and social security or other
                         identifying number of issuee)

     The undersigned hereby further requests that if said number of Rights shall
not be all the Rights represented by this Right Certificate, a new Right
Certificate for the remaining balance of such Rights be issued in the name of
and delivered to:

________________________________________________________________________________

________________________________________________________________________________
                  (Name, address and social security or other
                         identifying number of issuee)

     Dated:________________, 19__           _____________________________
                                            (Signature)


Signature Guaranteed:
<PAGE>
 
                   Form of Reverse Side of Right Certificate
                                  (continued)

                                  CERTIFICATE

     The undersigned hereby certifies by checking the appropriate boxes that:

     (1)   the Rights evidenced by this Right Certificate [  ] are [  ] are not
being exercised by or on behalf of a Person who is or was an Acquiring Person or
an Affiliate or Associate of any such Acquiring Person or an Affiliate or
Associate of any such Acquiring Person (as such terms are defined pursuant to
the Rights Agreement);

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


     Dated:________________, 19__           _____________________________
                                            (Signature)


Signature Guaranteed:

                                    NOTICE
                                    ------

     The signature to the foregoing Election to Purchase and the foregoing
Certificate, if applicable, must correspond to the name as written upon the face
of the this Right Certificate in every particular, without alteration or
enlargement or any change whatsoever, and must be guaranteed by a member firm of
a registered national securities exchange, a member of the National Association
of Securities Dealers, Inc., or a commercial bank or trust company having an
office or correspondent in the United States.

     In the event that the foregoing Certificate is not executed, with signature
guaranteed, the Company may deem the Rights represented by this Right
Certificate to be Beneficially Owned by an Acquiring Person or an Affiliate or
Associate of an Acquiring Person (as such capitalized terms are defined in the
Rights Agreement), and not issue any Right Certificate or Right Certificates in
exchange for this Right Certificate.



<PAGE>
 
                                   EXHIBIT C

                               SUMMARY OF TERMS

<PAGE>
 
UNDER CERTAIN CIRCUMSTANCES, AS SET FORTH IN THE RIGHTS AGREEMENT, RIGHTS ISSUED
TO, BENEFICIALLY OWNED BY OR TRANSFERRED TO ANY PERSON WHO IS OR BECOMES AN
ACQUIRING PERSON (AS DEFINED IN THE RIGHTS AGREEMENT) OR AN ASSOCIATE OR
AFFILIATE (AS DEFINED IN THE RIGHTS AGREEMENT) THEREOF AND CERTAIN TRANSFEREES
THEREOF WILL BE NULL AND VOID AND WILL NO LONGER BE TRANSFERABLE.

                              IKOS SYSTEMS, INC.
                                        
                              Summary of Terms of
                               Rights Agreement

<TABLE> 
<CAPTION> 
<S>                            <C>
Nature of Right:               When exercisable, each Right (a "Right") will initially entitle the holder 
                               to purchase one-hundredth of a share of Series G Preferred Stock ("Preferred 
                               Stock") of IKOS Systems, Inc. (the "Company").

Means of Distribution:         The Rights will be distributed to holders of the Company's outstanding
                               Common Stock as a dividend of one Right for each share of Common Stock.  The
                               Rights will also be attached to all future issuances of Common Stock prior
                               to the Distribution Date (as defined below).

Exercisability:                Rights become exercisable on the earlier of:  (i) the first date of public
                               announcement by the Company or any person or group (an "Acquiring Person")
                               that such person or group has acquired beneficial ownership of 15% or more
                               of the Company's outstanding Common Stock, or (ii) the tenth business day
                               (unless extended by the Board prior to the time a person becomes an
                               Acquiring Person) following the commencement, or announcement of an
                               intention to commence, by any person or group of a tender or exchange offer
                               which would result in such person owning 15% or more of the outstanding
                               Common Stock of the Company (the earlier of such dates is referred to as the
                               "Distribution Date").  Rights will trade separately from the Common Stock
                               once the Rights become exercisable.

Exercise Price:                $30.00 per share, which is the amount that in the judgment of the Board of
                               Directors represents the long-term value of the Common Stock (the "Exercise
                               Price").

Term:                          The Rights will expire upon the earlier of (i) ten years after the date of
                               issuance, or January 22, 2009 or (ii) redemption or exchange by the Company
                               as described below.

Redemption of Rights:          Rights are redeemable at a price of $.001 per Right, by the vote of the
                               Company's Board of Directors, at any time until the occurrence of a 
                               Section 11(a)(ii) Event (defined below).

Preferred Stock:               The Preferred Stock purchasable upon exercise of the Rights will be
                               nonredeemable and junior to any other series of preferred stock the Company
                               may issue (unless otherwise provided in the terms of such stock).  Each
                               share of Preferred Stock will have a preferential cumulative quarterly
                               dividend in an amount equal to the greater of (a) $25.00 or (b) 100 times
                               the dividend declared on each share of Common Stock.  In the event of
                               liquidation, the holders of Preferred Stock will receive a preferred
                               liquidation payment equal to the greater of (1) $1,000.00 per share, plus
                               accrued dividends to the date of distribution whether or not earned or
                               declared, or (b) an amount per share equal to 100 
</TABLE> 
<PAGE>
 
<TABLE> 
<S>                                  <C>
                                     times the aggregate payment to be distributed per share of Common Stock.  
                                     Each share of Preferred Stock will have 100 votes, voting together with the 
                                     shares of Common Stock. In the event of any merger, consolidation or other 
                                     transaction in which shares of Common Stock are exchanged for or changed into 
                                     other securities, cash and/or other property, each share of Preferred Stock 
                                     will be entitled to receive 100 times the amount and type of consideration 
                                     received per share of Common Stock. The rights of the Preferred Stock as to 
                                     dividends, liquidation and voting, and in the event of mergers and consolidations, 
                                     are protected by customary anti-dilution provisions. Fractional shares of  
                                     Preferred Stock will be issuable; however, the Company may elect to distribute 
                                     depositary receipts in lieu of such fractional shares. In lieu of fractional 
                                     shares other than fractions that are multiples of one one-hundredth of a share, 
                                     an adjustment in cash will be made based on the market price of the Preferred 
                                     Stock on the last trading date prior to the date of exercise.

Rights in Event of Self-Dealing      In the event that  an  Acquiring Person engages  in certain  self- dealing
Transaction or Acquisition of        transactions with the Company, or a Person becomes the beneficial owner of
Stock                                15% or more of the outstanding Common Stock of the Company ("Section
                                     11(a)(ii) Events"), a holder of a Right thereafter has the right to
                                     purchase, upon payment of the then current Exercise Price, such number of
                                     shares of Common Stock having a market value at the time of the transaction
                                     equal to the Exercise Price divided by one-half the Current Market Price (as
                                     defined in the Rights Agreement) of the Common Stock.  Notwithstanding the
                                     foregoing, Rights held by the Acquiring Person or any Associate or Affiliate
                                     thereof or certain transferees will be null and void and no longer be
                                     transferable.

                                     Self-dealing transactions are defined to include (i) a consolidation, merger
                                     or other combination of an Acquiring Person with the Company in which the
                                     Company is the surviving corporation, (ii) the transfer of assets to the
                                     Company in exchange for securities of the Company, or otherwise obtaining
                                     securities of the Company (other than in a pro rata distribution to all
                                     stockholders), (iii) the sale, purchase, transfer, distribution, lease,
                                     mortgage, pledge or acquisition of assets by the Acquiring Person to, from
                                     or with the Company on other than an arm's length basis, (iv) compensation
                                     to an Acquiring Person for services (other than for employment as a regular
                                     or part-time employee or director on a basis consistent with the Company's
                                     past practice), (v) a loan or provision of other financial assistance
                                     (except proportionately as a stockholder) to an Acquiring Person, (vi) the
                                     licensing, sale or other transfer of proprietary technology or know-how from
                                     the Company to the Acquiring Person on terms not approved by the Board of
                                     Directors or (vii) a reclassification, recapitalization or other transaction
                                     with the effect of increasing by more than 1% the Acquiring Person's
                                     proportionate share of any class of securities of the Company.

Rights in Event of Business          If, following  the occurrence  of a Section 11(a)(ii) Event, the Company is
Combination:                         acquired by any person in a merger or other business combination transaction 
                                     in which the Common Stock is exchanged or converted or in which the 
                                     corporation is not the surviving corporation, or 50% or more of its assets 
                                     or earnings power are sold to any person, each holder of a Right (other 
                                     than an Acquiring Person, or Affiliates or Associates thereof) shall
                                     thereafter have the right to purchase, upon payment of the then current
                                     Exercise Price, such number of shares of common stock of the acquiring
                                     company having a current market value equal to the Exercise Price divided 
                                     by one-half the Current Market Price of such common stock.
</TABLE> 


                                       2
<PAGE>
 
<TABLE> 
<S>                                  <C>
Exchange Option:                     In the event (i) any person or group becomes an Acquiring Person or (ii) any
                                     of the types of transactions, acquisitions or other events described above
                                     as self-dealing transactions occur, and prior to the acquisition by such
                                     person or group of 50% or more of the outstanding shares of Common Stock,
                                     the Board may require all or any portion of the outstanding Rights (other
                                     than Rights owned by such Acquiring Person which have become void) to be
                                     exchanged for Common Stock on a pro rata basis, at an exchange ratio of one
                                     share of Common Stock (or of a share of a class or series of the Company's
                                     preferred stock having equivalent rights, preferences and privileges), per
                                     Right (subject to adjustment).

Fractional Shares:                   No fractional shares of Common Stock will be issued upon exercise of the
                                     Rights and, in lieu thereof, a payment in cash will be made to the holder of
                                     such Rights equal to the same fraction of the current market value of a
                                     share of Common Stock.

Adjustment:                          The Exercise Price payable, and the number of shares of Preferred Stock or
                                     other securities or property issuable, upon exercise of the Rights are
                                     subject to adjustment from time to time to prevent dilution (i) in the event
                                     of a stock dividend on, or a subdivision, combination or reclassification of
                                     the Preferred Stock, (ii) upon the grant to holders of the Preferred Stock
                                     of certain rights or warrants to subscribe for Preferred Stock or
                                     convertible securities at less than the current market price of the
                                     Preferred Stock or (iii) upon the distribution to holders of the Preferred
                                     Stock of evidences of indebtedness or assets (excluding dividends payable in
                                     Preferred Stock) or of subscription rights or warrants (other than those
                                     referred to above).

Voting Power of Rights:              The Rights themselves do not entitle the holder thereof to any voting rights.

Amendment of Rights:                 Until the Rights become nonredeemable, the Company may, except with respect
                                     to the redemption price, amend the Agreement in any manner.  After the
                                     Rights become nonredeemable, the Company may amend the Agreement to cure any
                                     ambiguity, to correct or supplement any provision which may be defective or
                                     inconsistent with any other provisions, to shorten or lengthen any time
                                     period under the Rights Agreement, or to change or supplement any provision
                                     in any manner the Company may deem necessary or desirable, provided that no
                                     such amendment may adversely affect the interests of the holders of the
                                     Rights (other than the Acquiring Person or its Affiliates or Associates) or
                                     cause the Rights to again be redeemable or the Agreement to again be freely
                                     amendable.
</TABLE>

     A copy of the Rights Agreement is available, free of charge, from the
     Company, 19050 Pruneridge Ave., Cupertino, CA 95014, Attention: Secretary.
     This summary description of the Rights Agreement does not purport to be
     complete and is qualified in its entirety by reference to the Rights
     Agreement which is incorporated in this summary description by reference.


                                       3

<PAGE>
 
                                                                     EXHIBIT 7


                       CERTIFICATE OF AMENDMENT OF BYLAWS
                                       OF
                               IKOS SYSTEMS, INC.



     The undersigned, Joseph W. Rockom, hereby certifies that he is the duly
elected and acting Secretary of IKOS Systems, Inc. and that the following
amendment to the Corporation's Bylaws was approved by the Corporation's Board of
Directors effective as of January 22, 1999:

     Section 2 of Article I of the Bylaws of this Corporation is hereby amended
to read in its entirety as follows:

     "Special meetings of stockholders of the Corporation may be called only (1)
     by the board of directors pursuant to a resolution adopted by a majority of
     the total number of authorized directors (whether or not there exists any
     vacancies in previously authorized directorships at the time any such
     resolution is presented to the Board for adoption) or (2) by the holders of
     not less than ten percent (10%) of all of the shares entitled to cast votes
     at the meeting.

     Upon request in writing sent by registered mail to the president or chief
     executive officer by any stockholder or stockholders entitled to call a
     special meeting of stockholders pursuant to this Section 2, the board of
     directors shall determine a place and time for such meeting, which time
     shall be not less than one hundred twenty (120) nor more than one hundred
     thirty (130) days after the receipt of such request, and a record date for
     the determination of stockholders entitled to vote at such meeting shall be
     fixed by the board of directors, in advance, which shall not be more than
     60 days nor less than 10 days before the date of such meeting, nor more
     than 60 days prior to any other action.  Following such receipt of a
     request and determination of the validity of the request, it shall be the
     duty of the secretary to cause notice to be given to the stockholders
     entitled to vote at such meeting, in the manner set forth in Section 2
     hereof, that a meeting will be held at the place and time so determined".

     IN WITNESS WHEREOF, the undersigned has executed this Certificate as of the
date first written above.


                                         /s/ Joseph W. Rockom
                                        --------------------------------- 
                                        Joseph W. Rockom,                      
                                        Secretary

<PAGE>
 
                                                                       Exhibit 8

              IKOS SYSTEMS, INC. AMENDS SHAREHOLDER RIGHTS PLAN

CUPERTINO, California --  January 22, 1999

IKOS Systems, Inc. (NASDAQ:  IKOS) announced today that its Board of Directors
has approved amendments to its Rights Plan to better protect the Company against
certain coercive takeover tactics and inadequate offers.  The Company's
Shareholder Rights Plan has been amended to extend the term of the Plan to
January 22, 2009.  The amendments also reduce the stock ownership level at which
the rights become exercisable, increase the exercise price from $10.00 to
$30.00, address the situation where a person crosses the triggering threshold
inadvertently, eliminate permitted offers and make certain other technical
changes.

The Company's Board believes that the amendments will help ensure that the Plan
remains effective in preserving the Company's long-term value for its
stockholders.  The amendments are intended to bring the Rights Plan more in line
with the current provisions of shareholders rights plans of many other public
companies.  The amendments were not made in response to any proposal to acquire
the Company, and the Company's Board is not aware of any such effort.

As amended, the Rights Plan provides that if any person or group acquires 15% or
more of the Company's stock, each right not owned by such person or group will
entitle its holder to purchase, at the right's then-current exercise price, IKOS
common stock having a value of twice the right's exercise price.

In connection with the amendments to its Rights Plan, the Company also adopted
an amendment to the Company's Bylaws to clarify the timing of a special meeting
of stockholders after a request for such a meeting from a greater than ten
percent stockholder.  The new special meeting provision sets a minimum of 120
days and a maximum of 130 days as the time frame pursuant to which the Company
establishes the date of a special meeting after a request from a greater than
ten percent stockholder.

IKOS Systems, Inc. is a technology leader in high-performance design
verification solutions, including hardware and software simulation, for
language-based design, logic emulation for hardware/software co-verification and
consulting services.  The Company's mission is to help customers realize their
high complexity electronic systems through innovative design verification
solutions.

IKOS supports direct sales operations in North America, UK, France, Germany, and
Japan, and a distribution network throughout Europe and Asia.  Corporate
headquarters is in California.  IKOS Systems, Inc. 19050 Pruneridge Ave.,
Cupertino, California, 95014, 408/255-4567.  For more information, visit our
corporate website at http://www.ikos.com.


     CONTACT:  IKOS Systems, Inc.
               Joseph W. Rockom, 408/366-8514
               [email protected]
               or
               Public Relations
               Eileen Elam, 650/917-1488
               [email protected]
               or
               Investor Relations
               Alex Wellins/Doug Sherk, 415/296-7383


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