AGOURON PHARMACEUTICALS INC
8-A12G, 1996-11-08
PHARMACEUTICAL PREPARATIONS
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                       SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C.  20549

                                    FORM 8-A

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



                        Agouron Pharmaceuticals, Inc.   
                          (Exact name of registrant as specified
                                     in its charter)

                      California                     33-0061928    
                (State of incorporation          (I.R.S. Employer
                     or organization)            Identification No.)

     10350 North Torrey Pines Road, Suite 100, La Jolla, California 92037
                   (Address of principal executive offices) (Zip Code)


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


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

            None                                        N/A

If this Form relates to the registration of a class of debt securities and is 
effective upon filing pursuant to General Instruction A.(c)(1), please check 
the following box.  / /

If this Form relates to the registration of a class of debt securities and is 
to become effective simultaneously with the effectiveness of a concurrent 
registration statement under the Securities Act of 1933 pursuant to General 
Instruction A.(c)(2), please check the following box.  / /

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

Preferred Stock Purchase Rights (the "Rights")

                                     -1-
[PAGE]

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

     On November 7, 1996 the Board of Directors of Agouron Pharmaceuticals, 
Inc. (the "Company") declared a dividend distribution of one Right for each 
outstanding share of common stock, no par value (the "Common Stock"), of the 
Company to shareholders of record at the close of business on November 21, 
1996 (the "Record Date").  Except as set forth below, each Right, when 
exercisable, entitles the registered holder to purchase from the Company one
one-ten thousandth share of a new series of preferred stock, designated as 
Series B Participating Preferred Stock, no par value (the "Preferred Stock"), 
at a price of $500.00 per share (the "Purchase Price"), subject to 
adjustment.  The description and terms of the Rights are set forth in a 
Rights Agreement (the "Rights Agreement") between the Company and Chase 
Mellon Shareholder Services, L.L.C., as Rights Agent.

     Initially, the Rights will be attached to all Common Stock certificates 
representing shares then outstanding, and no separate Rights certificates 
will be distributed.  The Rights will separate from the Common Stock and a 
Distribution Date will occur upon the earliest of (a) public announcement 
that a Person or group of affiliated or associated Persons (an "Acquiring 
Person") has acquired, or obtained the right to acquire beneficial ownership 
of securities having fifteen percent (15%) or more of the voting power of all 
outstanding voting securities of the Company or (b) ten (10) days (unless 
such date is extended by the Board of Directors) following the commencement 
of (or a public announcement of an intention to make) a tender offer or 
exchange offer which would result in any Person or group and related Persons 
becoming an Acquiring Person.

     Until the Distribution Date the Rights will be evidenced, with respect 
to any of the Common Stock certificates outstanding as of the Record Date, by 
such Common Stock certificate together with this Summary of Rights.  The 
Rights Agreement provides that, until the Distribution Date, the Rights will 
be transferred with and only with Common Stock certificates.  From as soon as 
practicable after the Record Date and until the Distribution Date (or earlier 
redemption or expiration of the Rights), new Common Stock certificates issued 
after the Record Date upon transfer or new issuance of the Common Stock will 
contain a notation incorporating the Rights Agreement by reference.  Until 
the Distribution Date (or earlier redemption or expiration of the Rights), 
the surrender for transfer of any certificates for Common Stock outstanding 
as of the Record Date (with or without this Summary of Rights attached) 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 ("Rights 
Certificates") will be mailed to holders of record of the Common Stock as of 
the close of business on the Distribution Date, and the separate Rights 
Certificates alone will evidence the Rights.

                                     -2-
[PAGE]


      The Rights are not exercisable until the Distribution Date.  The Rights 
will expire on the earliest of (a) November 21, 2006, (b) consummation of a 
merger transaction with a Person or group who acquired Common Stock pursuant 
to a Permitted Offer (as defined below), and is offering in the merger the 
same price per share and form of consideration paid in the Permitted Offer, 
or (c) redemption or exchange of the Rights 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, certain 
convertible securities or securities having the same or more favorable 
rights, privileges and preferences as the Preferred Stock 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 regular quarterly cash dividends out of earnings or retained 
earnings) or of subscription rights or warrants (other than those referred to 
above).

     In the event that, after the first date of public announcement by the 
Company or an Acquiring Person that an Acquiring Person has become such, the 
Company is involved in a merger or other business combination transaction 
(whether or not the Company is the surviving corporation) or fifty percent 
 (50%) or more of the Company's assets or earning power are sold (in one 
transaction or a series of transactions), proper provision shall be made so 
that each holder of a Right (other than an Acquiring Person) shall thereafter 
have the right to receive, upon the exercise thereof at the then current 
exercise price of the Right, that number of shares of common stock of either 
the Company, in the event that it is the surviving corporation of a merger or 
consolidation, or the acquiring company (or, in the event there is more than 
one acquiring company, the acquiring company receiving the greatest portion 
of the assets or earning power transferred) which at the time of such 
transaction would have a market value of two times the exercise price of the 
Right (such right being called the "Merger Right").  In the event that a 
Person becomes the beneficial owner of securities having fifteen percent 
 (15%) or more of the voting power of all then outstanding voting securities 
of the Company (unless pursuant to a tender offer or exchange offer for all 
outstanding shares of Common Stock at a price and on terms determined prior 
to the date of the first acceptance of payment for any of such shares by at 
least a majority of the members of the Board of Directors who are not 
officers of the Company and are not Acquiring Persons or Affiliates or 
Associates thereof to be both adequate and otherwise in the best interests of 
the Company and its shareholders (a "Permitted Offer")), then 

                                     -3-
[PAGE]

proper provision shall be made so that each holder of a Right will for a 
sixty (60) day period (subject to extension under certain circumstances) 
thereafter have the right to receive upon exercise that number of shares of 
Common Stock having a market value of two times the exercise price of the 
Right, to the extent available, and then (after all authorized and unreserved 
shares of Common Stock have been issued) a common stock equivalent (such as 
Preferred Stock or another equity security with at least the same economic 
value as the Common Stock) having a market value of two times the exercise 
price of the Right, with Common Stock to the extent available being issued 
first (such right being called the "Subscription Right").  The holder of a 
Right will continue to have the Merger Right whether or not such holder 
exercises the Subscription Right.  Notwithstanding the foregoing, upon the 
occurrence of any of the events giving rise to the exercisability of the 
Merger Right or the Subscription Right, any Rights that are or were at any 
time after the Distribution Date owned by an Acquiring Person shall 
immediately become null and void.

     With certain exceptions, no adjustments in the Purchase Price will be 
required until cumulative adjustments require an adjustment of at least one 
percent (1%) in such Purchase Price.  No fractions of shares will be issued 
and, in lieu thereof, an adjustment in cash will be made based on the market 
price of the Common Stock on the last trading date prior to the date of 
exercise.

     At any time prior to the earlier to occur of (i) a Person becoming an 
Acquiring Person or (ii) the expiration of the Rights, the Company may redeem 
the Rights in whole, but not in part, at a price of $.001 per Right (the 
"Redemption Price"), which redemption shall be effective upon the action of 
the Board of Directors.  Additionally, the Company may thereafter redeem the 
then outstanding Rights in whole, but not in part, at the Redemption Price 
 (A) if such redemption is incidental to a merger or other business 
combination transaction or series of transactions involving the Company but 
not involving an Acquiring Person or certain related Persons or (B) following 
an event giving rise to, and the expiration of the exercise period for, the 
Subscription Right if and for as long as an Acquiring Person beneficially 
owns securities representing less than fifteen percent (15%) of the voting 
power of the Company's voting securities.  The redemption of Rights described 
in the preceding sentence shall be effective only as of such time when the 
Subscription Right is not exercisable, and in any event, only after ten (10) 
Business Days prior notice.  Upon the effective date of the 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.

     Subject to applicable law, the Board of Directors, at its option, may at 
any time after a Person becomes an Acquiring Person (but not after the 
acquisition by such Person of fifty percent (50%) or more of the outstanding 
Common Stock), exchange all or 

                                     -4-
[PAGE]

part of the then outstanding and exercisable rights (except for Rights which 
have become void) for shares of Common Stock equivalent to one share of 
Common Stock per Right or, alternatively, for substitute consideration 
consisting of cash, securities of the Company or other assets (or any 
combination thereof).

     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 quarterly dividend in an amount 
equal to 10,000 times the dividend declared on each share of Common Stock, 
but in no event less than $100.  In the event of liquidation, the holders of 
Preferred Stock will receive a preferred liquidation payment equal to the 
greater of 10,000 times $1.00 or 10,000 times the payment made per each share 
of Common Stock.  Each share of Preferred Stock will have 10,000 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, each share of Preferred Stock will be entitled to receive 10,000 
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 antidilution 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-ten thousandth 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.

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

Item 2.     Exhibits.

  1     Form of Rights Agreement dated as of November 7, 1996 between Agouron 
Pharmaceuticals, Inc. and Chase Mellon Shareholder Services, L.L.C., which 
includes as Exhibit B the form of Rights Certificate.  Pursuant to the Rights 
Agreement, Rights Certificates will not be mailed until the earlier of (i) a 
public announcement that a person or a group of affiliated or associated 
persons has acquired beneficial ownership of securities representing 15% or 
more of the outstanding common stock or (ii) ten days after a person or a 
group of affiliated or associated persons has commenced or announced an 
intent to commence a tender offer or exchange offer which, upon consummation 
thereof, would cause such person or group to own beneficially securities 
representing 15% or more of the outstanding common stock.

                                     -5-
[PAGE]

                                  SIGNATURE

     Pursuant to the requirements of Section 12 of the Securities Exchange 
Act of 1934, as amended, the Registrant has duly caused this Registration 
Statement to be signed on its behalf by the undersigned, thereto duly 
authorized.

     Dated:  November 7, 1996.

                                     AGOURON PHARMACEUTICALS, INC.



                                     By  /s/ Peter Johnson
                                         ----------------------------------
                                                  Peter Johnson
                                                  President and
                                             Chief Executive Officer


                                     -6-
[PAGE]

                          EXHIBIT INDEX


Exhibit                                                            Page
  1         Form of Rights Agreement dated as of November 7, 
            1996 between Agouron Pharmaceuticals, Inc. and 
            Chase Mellon Shareholder Services, L.L.C., which
            includes as Exhibit B the form of Rights Certificate. 
            Pursuant to the Rights Agreement, Rights Certificates 
            will not be mailed until the earlier of (i) a public 
            announcement that a person or a group of affiliated or 
            associated persons has acquired beneficial ownership of
            securities representing 15% or more of the outstanding 
            common stock or (ii) ten days after a person or a group 
            of affiliated or associated persons has commenced or 
            announced an intent to commence a tender offer or
            exchange offer which, upon consummation thereof, would
            cause such person or group to own beneficially securities 
            representing 15% or more of the outstanding common stock.


                                     -7-
[PAGE]




                                                                    EXHIBIT 1









                            AGOURON PHARMACEUTICALS, INC.





                                       and





                     CHASE MELLON SHAREHOLDER SERVICES, L.L.C.





                                   Rights Agent


                               ___________________

                                 Rights Agreement




                          Dated as of November 7, 1996





[PAGE]




                               TABLE OF CONTENTS



                                                                     Page

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

2.     Appointment of Rights Agent  . . . . . . . . . . . . . . . . .  4

3.     Issue of Rights Certificates  . . . . . . . . . . . . . . . . . 4

4.     Form of Rights Certificates  . . . . . . . . . . . . . . . . .  6

5.     Countersignature and Registration  . . . . . . . . . . . . . .  7

6.     Transfer, Split Up, Combination and Exchange 
       of Rights Certificates; Mutilated, Destroyed, 
       Lost or Stolen Rights Certificates . . . . . . . . . . . . . .  7

7.     Exercise of Rights; Purchase Price; Expiration Date
       of Rights . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

8.     Cancellation and Destruction of Rights Certificates . . . . .  10

9.     Reservation and Availability of Preferred Stock . . . . . . . .10

10.    Preferred Stock Record Date  . . . . . . . . . . . . . . . . . 12

11.    Adjustment of Purchase Price, Number and Kind of  
       Shares or Number of Rights . . . . . . . . . . . . . . . . . . 12

12.    Certificate of Adjusted Purchase Price or Number of
       Shares . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

13.    Consolidation, Merger or Sale or Transfer of
       Assets or Earning Power . . . . . . . . . . . . . . . . . . .  20

14.    Additional Covenants  . . . . . . . . . . . . . . . . . . . .  23

15.    Fractional Rights and Fractional Shares . . . . . . . . . . .  24

16.    Rights of Action  . . . . . . . . . . . . . . . . . . . . . .  25

17.    Agreement of Rights Holders  . . . . . . . . . . . . . . . . . 26

18.    Rights Certificate Holder Not Deemed a Shareholder . . . . . . 26

19.    Concerning the Rights Agent . . . . . . . . . . . . . . . . .  27

20.    Merger or Consolidation or Change of Name of 
       Rights Agent . . . . . . . . . . . . . . . . . . . . . . . . . 27

21.    Duties of Rights Agent  . . . . . . . . . . . . . . . . . . .  28

                                       -i-
[PAGE]

22.    Change of Rights Agent  . . . . . . . . . . . . . . . . . . .  30

23.    Issuance of New Rights Certificates  . . . . . . . . . . . . . 31

24.    Redemption, Termination and Exchange  . . . . . . . . . . . .  32

25.    Notice of Certain Events . . . . . . . . . . . . . . . . . . . 35

26.    Notices . . . . . . . . . . . . . . . . . . . . . . . . . . .  36

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

28.    Determination and Actions by the Board of 
       Directors, etc. . . . . . . . . . . . . . . . . . . . . . . .  37

29.    Successors . . . . . . . . . . . . . . . . . . . . . . . . . . 37

30.    Benefits of This Agreement . . . . . . . . . . . . . . . . . . 37

31.    Severability . . . . . . . . . . . . . . . . . . . . . . . . . 38

32.    Governing Law . . . . . . . . . . . . . . . . . . . . . . . .  38

33.    Counterpartsb . . . . . . . . . . . . . . . . . . . . . . . .  38

34.    Descriptive Headings . . . . . . . . . . . . . . . . . . . . . 38

Exhibit A   -  Certificate of Designation, Preferences and
               Rights of Series B Participating Preferred 
               Stock . . . . . . . . . . . . . . . . . . . . . . . .  A-1

Exhibit B   -  Form of Rights Certificate. . . . . . . . . . . . . .  B-1



Exhibit C   -  Form of Summary of Rights. . . . . . . . . . . . . . . C-1

                                       -ii-
[PAGE]


                                RIGHTS AGREEMENT


     THIS RIGHTS AGREEMENT, dated as of November 7, 1996 by and between 
AGOURON PHARMACEUTICALS, INC., a California corporation (the "Company"), and 
CHASE MELLON SHAREHOLDER SERVICES, L.L.C., a New Jersey limited liability 
company (the "Rights Agent"),

                               W I T N E S S E T H:

     WHEREAS, on November 7, 1996, the Board of Directors of the Company 
authorized and declared a dividend distribution of one Right (as hereinafter 
defined) for each share of Common Stock, no par value, of the Company (the 
"Common Stock") outstanding as of the close of business on November 21, 1996 
(the "Record Date"), and contemplates the issuance of one Right (subject to 
adjustment as provided herein) for each share of Common Stock of the Company 
issued between the Record Date and the earlier of the Distribution Date and 
the Expiration Date, as such terms are hereinafter defined (with Rights also 
to be issued in connection with certain issuances of Common Stock after the 
Distribution Date, as provided more fully herein), each Right representing 
the right to purchase one one-ten thousandth of a share of Series B 
Participating Preferred Stock of the Company having the rights, powers and 
preferences set forth in the form of Certificate of Designation, Preferences 
and Rights attached hereto as Exhibit A, upon the terms and subject to the 
conditions hereinafter set forth (the "Rights"):

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

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

      (a)    "Acquiring Person" shall mean any Person (as such term is 
hereinafter defined) who or which, together with all Affiliates (as such term 
is hereinafter defined) and Associates (as such term is hereinafter defined) 
of such Person, shall be the Beneficial Owner (as such term is hereinafter 
defined) of securities representing fifteen percent (15%) or more of the 
shares of Common Stock then outstanding or who was such a Beneficial Owner at 
any time after the date hereof, whether or not such Person continues to be 
the Beneficial Owner of securities representing fifteen percent (15%) or more 
of the outstanding shares of Common Stock.  Notwithstanding the foregoing, 
(i) 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 outstanding shares of 
Common Stock by the Company, which reduction 

                                       -1-
[PAGE]

increases the percentage of outstanding shares of Common Stock beneficially 
owned by such Person (provided that any subsequent increase in the amount of 
Common Stock beneficially owned by such Person, together with all Affiliates 
and Associates of such Person, without the prior approval of the Company 
shall cause such Person to be an Acquiring Person); (ii) the term Acquiring 
Person shall not mean (A) the Company, (B) any subsidiary of the Company (as 
such term is hereinafter defined), (C) any employee benefit plan of the 
Company or any of its subsidiaries, or (D) any entity holding securities of 
the Company organized, appointed or established by the Company or any of its 
subsidiaries for or pursuant to the terms of any such plan; and (iii) no 
Person shall be deemed to be an Acquiring Person if (A) within five (5) 
business days after such Person would otherwise have become an Acquiring 
Person (but for the operation of this clause (iii)), such Person notifies the 
Board of Directors that such Person did so inadvertently and within two (2) 
business days after such notification, such Person is the Beneficial Owner of 
less than fifteen percent (15%) of the outstanding shares of Common Stock or 
 (B) by reason of such Person's Beneficial Ownership of fifteen percent (15%) 
or more of the outstanding shares of Common Stock on the date hereof if prior 
to the Record Date, such Person notifies the Board of Directors that such 
Person is no longer the Beneficial Owner of fifteen percent (15%) or more of 
the then outstanding shares of Common Stock.

      (b)     "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 (the "Exchange Act"), 
as in effect on the date of this Agreement.

     (c)     A Person shall be deemed the "Beneficial Owner" of, and shall be 
deemed to "beneficially own," any securities:

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

     (ii)     which such Person or any of such Person's Affiliates or 
Associates has (A) the right or obligation to acquire (whether such right or 
obligation is exercisable or effective immediately or only after the passage 
of time) pursuant to any agreement, arrangement or understanding (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 payment or exchange; or (B) 
the right to vote pursuant to any agreement, arrangement or understanding 
(whether or not in writing); provided,

                                       -2-
[PAGE]

however, that a Person shall not be deemed the "Beneficial Owner" of, or to 
"beneficially own," any security under this clause (B) if the agreement, 
arrangement or understanding to vote such security (1) arises solely from a 
revocable proxy 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 (or any Affiliate or Associate thereof) with which such Person 
or any of such Person's Affiliates or Associates has any agreement, 
arrangement or understanding (whether or not in writing) (other than 
customary agreements with and between underwriters and selling group members 
with respect to a bona fide public offering of securities), or with which 
such Person or any of such Person's Affiliates have otherwise formed a group, 
for the purpose of acquiring, holding, voting (except pursuant to a revocable 
proxy as described in clause (B) of subparagraph (ii) of this paragraph (c)) 
or disposing of any securities of the Company.

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

     (e)     "Close of business" on any given date shall mean 5:00 p.m., 
Pacific time, on such date; provided, however, that if such date is not a 
Business Day it shall mean 5:00 p.m., Pacific time, on the next succeeding 
Business Day.

     (f)     "Common Stock" shall mean the Common Stock, no par value, of the 
Company, except that "Common Stock" when used with reference to stock issued 
by any Person other than the Company shall mean the capital stock with the 
greatest voting power, or the equity securities or other equity interest 
having power to control or direct the management, of such Person or, if such 
Person is a subsidiary of another Person, of the Person which ultimately 
controls such first-mentioned Person and which has issued and outstanding 
such capital stock, equity securities or equity interests.

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

     (h)     "Person" shall mean any individual, firm, corporation, 
partnership, limited liability company, joint venture, association, trust or 
other entity.

     (i)     "Preferred Stock" shall mean the Series B Participating 
Preferred Stock, no par value, of the Company.


                                       -3-
[PAGE]

     (j)     "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.

     (k)     A "subsidiary" of any Person shall mean any corporation or other 
entity of which a majority of the voting power of the voting equity 
securities or voting interests is owned, directly or indirectly, by such 
Person, or which is otherwise controlled by such Person.

     (l)     "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.

     2.     Appointment of Rights Agent.  The Company hereby appoints the 
Rights Agent to act as agent for the Company and the holders of the Rights 
(who, in accordance with Section 3 hereof, shall prior to the Distribution 
Date also be the holders of the Common Stock) in accordance with the terms 
and conditions hereof, and the Rights Agent hereby accepts such appointment. 
The Company may from time to time appoint such Co-Rights Agents as it may 
deem necessary or desirable.  In the event the Company appoints one or more 
Co-Rights Agents, the respective duties of the Rights Agents and any Co-
Rights Agents shall be as the Company shall determine.

     3.     Issue of Rights Certificates.

     (a)     Until the earlier of (i) the Stock Acquisition Date or (ii) the 
tenth day (or such later date as may be determined by action of the Board of 
Directors) after the date of the commencement of, or first public 
announcement of the intent of any Person (other than the Company, any 
subsidiary of the Company, or any employee benefit plan of the Company or any 
of its subsidiaries) to commence (which intention to commence remains in 
effect for five (5) Business Days after such announcement), a tender or 
exchange offer which would result in such Person becoming an Acquiring Person 
(including any such date which is on or after the date of this 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 shall be evidenced 
(subject to the provisions of paragraph (b) of this Section 3) by the 
certificates for Common Stock registered in the names of the holders of the 
Common Stock (which certificates for Common Stock shall be deemed also to be 
certificates for Rights) and not by separate certificates, and (y) the Rights 
(and the right to receive certificates therefor) shall be transferable only 
in connection with the transfer of the underlying shares of Common Stock.  As 
soon as practicable after the Distribution Date, the Rights Agent shall send 
by first-class, insured, postage prepaid mail, to each record holder of the 
Common Stock as of the close of business on the Distribution Date, at the 
address of such holder shown on the records of the Company, a certificate for 
Rights, in 

                                       -4-
[PAGE]

substantially the form of Exhibit B hereto (the "Rights Certificates"), 
evidencing one Right for each share of Common Stock so held.  As of and after 
the Distribution Date, the Rights shall be evidenced solely by such Rights 
Certificates.

     As soon as practicable following the Record Date, the Company shall send 
a copy of a Summary of Rights, in substantially the form attached hereto as 
Exhibit C (the "Summary of Rights"), by first-class, postage prepaid mail, to 
each record holder of the 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.  With respect to certificates for the Common Stock outstanding as of 
the Record Date, until the Distribution Date (or earlier redemption, 
expiration or termination of the Rights), the Rights shall be evidenced by 
such certificates for the Common Stock together with the Summary of Rights 
and the registered holders of the Common Stock shall also be the registered 
holders of the associated Rights.  Until the Distribution Date (or earlier 
redemption, expiration or termination of the Rights), the surrender for 
transfer of any of the certificates for the Common Stock outstanding on the 
Record Date, even without a copy of the Summary of Rights attached thereto, 
shall also constitute the transfer of the Rights associated with the Common 
Stock represented by such certificate.

     (b)     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 (as such term is hereinafter defined), shall be deemed 
also to be certificates for Rights, and shall have impressed, printed, 
stamped, written or otherwise affixed onto them the following legend:

This certificate also evidences and entitles the holder hereof to certain 
Rights as set forth in a Rights Agreement between Agouron Pharmaceuticals, 
Inc. (the "Company") and Chase Mellon Shareholder Services, L.L.C. (the 
"Rights Agent") dated as of November 7, 1996 (the "Rights Agreement"), the 
terms of which are hereby incorporated herein by reference and a copy of 
which is on file at the principal offices of the Company.   Under certain 
circumstances, as set forth in the Rights Agreement, such Rights may be 
redeemed, may expire, or may be evidenced by separate Certificates and will 
no longer be evidenced by this Certificate.  The Company will mail to the 
holder of this certificate a copy of the Rights Agreement without charge 
within five (5) days after receipt of a written request therefor.  Under 
certain circumstances, Rights issued to Acquiring Persons (as defined in the 
Rights Agreement) or certain related Persons and any subsequent holder of 
such Rights may become null and void.

                                       -5-
[PAGE]


With respect to such certificates containing the foregoing legend, until the 
Distribution Date (or earlier redemption, expiration or termination of the 
Rights), the Rights associated with the Common Stock represented by such 
certificates shall be evidenced by such certificates alone, and the surrender 
for transfer of any of such certificates shall also constitute the transfer 
of the Rights associated with the Common Stock represented by such 
certificate.

     4.     Form of Rights Certificates.

     (a)     The Rights Certificates (and the forms of election to purchase 
shares and of assignment and certificates to be printed on the reverse 
thereof) shall each 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 
Agreement, or as may be required to comply with any applicable law or with 
any rule or regulation made pursuant thereto or with any rule or regulation 
of any stock exchange on which the Rights may from time to time be listed, or 
to conform to usage.  Subject to the provisions of Section 11 and Section 23 
hereof, the Rights Certificates, whenever distributed, shall be dated as of 
the Record Date, and on their face shall entitle the holders thereof to 
purchase such number of one one-ten thousandths of a share of Preferred Stock 
as shall be set forth therein at the price per one one-ten thousandth of a 
share set forth therein (the "Purchase Price"), but the number of such shares 
and the Purchase Price shall be subject to adjustment as provided herein.

     (b)     Any Rights Certificate issued pursuant to Section 3(a) hereof 
that represents Rights beneficially owned by an Acquiring Person or any 
Associate or Affiliate thereof and any Rights Certificate issued at any time 
upon the transfer of any Rights to such an Acquiring Person or any Associate 
or Affiliate thereof or to any nominee of such Acquiring Person, Associate or 
Affiliate, and any Rights Certificate issued pursuant to Section 6 or Section 
11 upon transfer, exchange, replacement or adjustment of any other Rights 
Certificate referred to in this sentence, shall contain the following legend:

The Rights represented by this Rights Certificate were issued to a Person who 
was an Acquiring Person or an Affiliate or an Associate of an Acquiring 
Person, as such terms are defined in the Rights Agreement.  This Rights 
Certificate and the Rights represented hereby may become void under the 
circumstances specified in Section 7(e) of the Rights Agreement.

The provisions of Section 7(e) of this Rights Agreement shall be operative 
whether or not the foregoing legend is contained on any such Rights 
Certificate.

                                       -6-
[PAGE]

     5.     Countersignature and Registration.  The Rights  Certificates 
shall be executed on behalf of the Company by its President or any Vice 
President, either manually or by facsimile signature, and shall have affixed 
thereto the Company's seal or a facsimile thereof which shall be attested by 
the Secretary or an Assistant Secretary of the Company, either manually or by 
facsimile signature.  The Rights Certificates shall be countersigned by the 
Rights Agent, either manually or by facsimile signature, and shall not be 
valid for any purpose unless so countersigned.  In case any officer of the 
Company who shall have signed any of the Rights Certificates shall cease to 
be such officer of the Company before countersignature by the Rights Agent 
and issuance and delivery by the Company, such Rights Certificates, 
nevertheless, may be countersigned by the Rights Agent, and issued and 
delivered by the Company with the same force and effect as though the Person 
who signed such Rights Certificates had not ceased to be such officer of the 
Company; and any Rights Certificates may be signed on behalf of the Company 
by any Person who, at the actual date of the execution of such Rights 
Certificate, shall be a proper officer of the Company to sign such Rights 
Certificate, although at the date of the execution of this Rights Agreement 
any such Person was not such an officer.

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

     6.     Transfer, Split Up, Combination and Exchange of Rights 
Certificates; Mutilated, Destroyed, Lost or Stolen Rights  Certificates.  
Subject to the provisions of Section 15 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 Rights Certificate or Certificates may 
be transferred, split up, combined or exchanged for another Rights 
Certificate or Rights Certificates, entitling the registered holder to 
purchase a like number of shares of Preferred Stock as the Rights Certificate 
or Rights Certificates surrendered then entitled such holder to purchase. 
Any registered holder desiring to transfer, split up, combine or exchange any 
Rights Certificate shall make such request in writing delivered to the Rights 
Agent, and shall surrender the Rights Certificate or Rights Certificates to 
be transferred, split up, combined or exchanged at the principal office of 
the Rights Agent.   Thereupon the Rights Agent shall countersign and deliver 
to the Person entitled thereto a Rights Certificate or Rights 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 Rights 
Certificates.

                                       -7-
[PAGE]

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

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

     (a)     The registered holder of any Rights Certificate may exercise the 
Rights evidenced thereby (except as otherwise provided herein) in whole or in 
part at any time after the Distribution Date upon presentation of the Rights 
Certificate, with the appropriate form of election to purchase on the reverse 
side thereof duly executed, to the Rights Agent at the principal office of 
the Rights Agent, together with payment of the Purchase Price for each one 
one-ten thousandth of a share of  Preferred Stock (or such other number of 
shares or other securities) as to which the Rights are exercised, at or prior 
to the earliest of (i) the close of business on November 21, 1996 (the "Final 
Expiration Date"), (ii) the time at which the Rights are redeemed as provided 
in Section 24 hereof, (iii) the consummation of a transaction contemplated by 
Section 13(d) hereof, or (iv) the time at which the Rights are exchanged as 
provided in Section 24(c) hereof (such earliest time being herein referred to 
as the "Expiration Date").  Notwithstanding any other provision of this 
Agreement, any Person who prior to the Distribution Date becomes a record 
holder of shares of Common Stock may exercise all of the rights of a 
registered holder of a Rights Certificate with respect to the Rights 
associated with such shares of Common Stock in accordance with and subject to 
the provisions of this Agreement, including the provisions of Section 7(e) 
hereof, as of the date such Person becomes a record holder of shares of 
Common 
Stock.

     (b)     The Purchase Price for each one one-ten thousandth share of 
Preferred Stock pursuant to the exercise of a Right shall initially be 
$500.00, shall be subject to adjustment from time to time as provided in 
Sections 11 and 13 hereof and shall be payable in lawful money of the United 
States of America in accordance with paragraph (c) below.

     (c)     Upon receipt of a Rights Certificate representing exercisable 
Rights, with the appropriate form of election to 

                                       -8-
[PAGE]

purchase duly executed, accompanied by payment of the Purchase Price for the 
shares (or other securities or property) to be purchased and an amount equal 
to any applicable transfer tax (as determined by the Rights Agent) in cash, 
or by certified check or bank draft payable to the order of the Company, the 
Rights Agent shall, subject to Section 21(k), thereupon promptly (i)(A) 
requisition from any transfer agent of the shares of Preferred Stock (or make 
available, if the Rights Agent is the transfer agent) certificates for the 
number of shares of Preferred Stock to be purchased, and the Company hereby 
irrevocably authorizes its transfer agent to comply with all such requests, 
or (B) if the Company, in its sole discretion, shall have elected to deposit 
the shares of Preferred Stock issuable upon exercise of the Rights hereunder 
into a depositary, requisition from the depositary agent depositary receipts 
representing such number of one one-ten thousandths of a share of Preferred 
Stock as are to be purchased (in which case certificates for the shares of 
Preferred Stock represented by such receipts shall be deposited by the 
transfer agent with the depositary agent) and the Company shall direct the 
depositary agent to comply with such request, (ii) when appropriate, 
requisition from the Company the amount of cash, if any, to be paid in lieu 
of issuance of fractional shares in accordance with Section 15, (iii) 
promptly after receipt of such certificates or depositary receipts, cause the 
same to be delivered to or upon the order of the registered holder of such 
Rights Certificate, registered in such name or names as may be designated by 
such holder, and (iv) when appropriate, after receipt promptly deliver such 
cash to or upon the order of the registered holder of such Rights 
Certificate.  In the event that the Company is obligated to issue other 
securities of the Company, and/or distribute other property pursuant to 
Section 11(a), the Company shall make all arrangements necessary so that such 
other securities and/or property are available for distribution by the Rights 
Agent, if and when appropriate.  In addition, in the case of an exercise of 
the Rights by a holder pursuant to Section 11(a)(ii), the Rights Agent shall 
return such Rights Certificate to the registered holder thereof after 
imprinting, stamping or otherwise indicating thereon that the rights 
represented by such Rights Certificate no longer include the rights provided 
by Section 11(a)(ii) of the Rights Agreement and if less than all the Rights 
represented by such Rights Certificate were so exercised, the Rights Agent 
shall indicate on the Rights Certificate the number of Rights represented 
thereby which continue to include the rights provided by Section 11(a)(ii).

     (d)     In case the registered holder of any Rights Certificate shall 
exercise (except pursuant to Section 11(a)(ii)) less than all the Rights 
evidenced thereby, a new Rights Certificate evidencing Rights equivalent to 
the Rights remaining unexercised shall be issued by the Rights Agent and 
delivered to the registered holder of such Rights Certificate or to his duly 
authorized assigns, subject to the provisions of Section 15 hereof.

                                       -9-
[PAGE]

     (e)     Notwithstanding anything in this Agreement to the contrary, if 
there occurs any of the events set forth in Section 11(a)(ii) or Section 
13(a) then any Rights that are or were on or after the Distribution Date 
beneficially owned by an Acquiring Person or any Associate or Affiliate of an 
Acquiring Person shall become null and void, without any further action, and 
any holder of such Rights shall thereafter have no rights whatsoever with 
respect to such Rights, whether under any provision of this Agreement or 
otherwise.

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

     8.     Cancellation and Destruction of Rights Certificates.  All Rights 
Certificates surrendered for the purpose of exercise, transfer, split up, 
combination or exchange shall, if  surrendered to the Company or 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 
Rights 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 other Rights Certificate 
purchased or acquired by the Company otherwise than upon the exercise 
thereof.  The Rights Agent shall deliver all canceled Rights Certificates to 
the Company, or shall, at the written request of the Company, destroy such 
canceled Rights Certificates, and in such case shall deliver a certificate of 
destruction thereof to the Company.

     9.     Reservation and Availability of Preferred Stock.  The Company 
covenants and agrees that it shall cause to be reserved and kept available 
out of its authorized and unissued shares of Preferred Stock, or any 
authorized and issued shares of Preferred Stock held in its treasury, the 
number of shares of Preferred Stock that will be sufficient to permit the 
exercise in full of all outstanding Rights and, after the occurrence of an 
event specified in Sections 11 and 13, shall so reserve and keep available a 
sufficient number of shares of Common Stock (and/or other securities) which 
may be required to permit the exercise in full of the Rights pursuant to this 
Agreement.

                                       -10-
[PAGE]

     So long as the shares of Preferred Stock (and, after the occurrence of 
an event specified in Section 11 and 13, any other securities) issuable upon 
the exercise of the Rights may be listed on any national securities exchange 
or national quotation system, the Company shall use its best efforts to 
cause, from and after such time as the Rights become exercisable, all shares 
(or other securities) reserved for such issuance to be listed on such 
exchange or system upon official notice of issuance upon such exercise.

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

     The Company further covenants and agrees that it shall pay when due and 
payable any and all federal and state transfer taxes and charges which may be 
payable in respect of the issuance or delivery of the Rights Certificates or 
of any  certificates for shares of Preferred Stock and/or other securities 
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 Rights  Certificates to a Person other than, or in respect of the 
issuance or delivery of the shares of Preferred Stock and/or other securities 
in a name other than that of, the registered holder of the Rights 
Certificates evidencing Rights surrendered for exercise or to issue or 
deliver any certificates for shares of Preferred Stock, and/or other 
securities in a name other than that of the registered holder upon the 
exercise of any Rights until such tax shall have been paid (any such tax 
being payable by the holder of such Rights Certificate at the time of 
surrender) or until it has been 
established to the Company's satisfaction that no such tax is due.

     The Company shall use its best efforts to (a) file, if required by law, 
as soon as practicable following the Distribution Date, a registration 
statement under the Securities Act of 1933, as amended (the "Act"), with 
respect to the securities purchasable upon exercise of the Rights on an 
appropriate form, (b) cause such registration statement to become effective 
as soon as practicable after such filing, and (c) cause such registration 
statement to remain effective (with a prospectus at all times meeting the 
requirements of the Act and the rules and regulations thereunder) until the 
Expiration Date (unless and until the Company shall have received an opinion 
of counsel to the effect that the maintenance of such registration statement 
in effect is no longer necessary).  The Company will also take such action as 
may be appropriate under the blue sky laws of the various states.

                                       -11-
[PAGE]

     10.     Preferred Stock Record Date.  Each Person in whose name any 
certificate for shares of Preferred Stock (or other securities) 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) 
represented thereby on, and such certificate shall be dated, the date upon 
which the Rights Certificate evidencing such Rights was duly presented and 
payment of the Purchase Price (and any applicable transfer taxes) was made; 
provided, however, that if the date of such presentation and payment is a 
date upon which the Preferred Stock (or other securities) transfer books of 
the Company are closed, such Person shall be deemed to have become the record 
holder of such shares on, and such certificate shall be dated, the next 
succeeding Business Day on which the Preferred Stock (or other securities) 
transfer books of the Company are open.  Prior to the exercise of the Rights 
evidenced thereby, the holder of a Rights Certificate, as such, shall not be 
entitled to any rights of a shareholder of the Company with respect to 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.     Adjustment of Purchase Price, Number and Kind of Shares or 
Number of Rights.  The Purchase Price, the number of shares covered by each 
Right and the number of Rights outstanding 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 Agreement (A) declare a dividend on the Preferred Stock payable 
in shares of Preferred Stock, (B) subdivide the outstanding Preferred Stock, 
(C) combine the outstanding Preferred Stock into a smaller number of shares 
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) and in 
Section 7(e), the Purchase Price in effect at the time of the record date for 
such dividend or of the effective date of such subdivision, combination or 
reclassification, and the number and kind of shares of capital stock issuable 
on such date, shall be proportionately adjusted so that the holder of any 
Right exercised after such time shall be entitled to receive the aggregate 
number and kind of shares of capital stock and other securities which, if 
such Right had been exercised immediately prior to such date and at a time 
when the Preferred Stock transfer books of the Company were open, he would 
have owned upon such exercise and been entitled to receive by virtue of such 
dividend, subdivision, combination or reclassification.  If an event occurs 
which would require an adjustment under both Section 11(a)(i) and Section 
11(a)(ii), the adjustment provided for in this Section 

                                       -12-
[PAGE]

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(c) of this Agreement, in the event any 
Person, alone or together with its Affiliates and Associates, shall become an 
Acquiring Person (except pursuant to a tender or exchange offer for all 
outstanding shares of Common Stock at a price and on terms determined by at 
least a majority of the members of the Board of Directors who are not 
officers of the Company and are not Acquiring Persons or Affiliates or 
Associates thereof to be in the best interests of the Company and its 
shareholders (other than the Person or an Affiliate or Associate thereof on 
whose behalf the offer is being made) (a "Permitted Offer")), then, promptly 
following the first occurrence of an event described in this Section 
11(a)(ii), proper provision shall be made so that each holder of a Right, 
except as provided in Section 7(e) hereof, shall, for a period of sixty (60) 
days after the later of the occurrence of any such event and the effective 
date of an appropriate registration statement pursuant to Section 9, have a 
right to receive, upon exercise thereof at the then current Purchase Price in 
accordance with the terms of this Agreement, in lieu of shares of Preferred 
Stock, such number of shares of Common Stock of the Company as shall equal 
the result obtained by (x) multiplying the then current Purchase Price by the 
then number of one one-ten thousandths of a share of Preferred Stock for 
which a Right is then exercisable and (y) dividing that product by fifty 
percent (50%) of the current market price per one share of Common Stock 
(determined pursuant to Section 11(d)) on the date of the occurrence of the 
event set forth in this 
subparagraph (ii) (such number of shares being referred to as the "number of 
Adjustment Shares"); provided, however, that if the transaction that would 
otherwise give rise to the foregoing adjustment is also subject to the 
provisions of Section 13 hereof, then only the provisions of Section 13 
hereof shall apply and no adjustment shall be made pursuant to this Section 
11(a)(ii); and provided, further, that such sixty (60) day period shall not 
be deemed to run during any period in which the exercise of the Rights or the 
fulfillment by the Company or the Rights Agent of its or their obligations 
under their Agreement shall be enjoined or otherwise prohibited in full or in 
part by any court or other governmental agency or body.

     (iii)     In lieu of issuing shares of Common Stock in accordance with 
Section 11(a)(ii) hereof, the Company may, if a majority of the Board of 
Directors then in office determines that such action is necessary or 
appropriate and not contrary to the interests of holders of Rights, elect to 
(and, in the event that the Board of Directors has not exercised the exchange 
right contained in Section 24(c) hereof and there are not sufficient treasury 
shares and authorized but unissued shares of Common Stock to permit the 
exercise in full of the Rights in accordance with the foregoing subparagraph 
(ii), the Company shall) take all such action as may be necessary to 
authorize, issue or pay, upon the exercise of the Rights, cash (including by 
way of a reduction of the Purchase 

                                       -13-
[PAGE]

Price), property, shares of Common Stock, other securities or any combination 
thereof having an aggregate value equal to the value of the shares of Common 
Stock which otherwise would have been issuable pursuant to Section 11(a)(ii), 
which aggregate value shall be determined by a nationally recognized 
investment banking firm selected by a majority of the Board of Directors. 
For purposes of the preceding sentence, the value of the Common Stock shall 
be determined pursuant to Section 11(d) hereof and the value of any preferred 
stock or preference stock which a majority of the Board of Directors 
determines to be a "common stock equivalent" shall be deemed to have the same 
value as the Common Stock.  Any such election by the Board of Directors must 
be made and publicly announced within sixty (60) days following the date on 
which the event described in Section 11(a)(ii) shall have occurred. 
Following the occurrence of the event described in Section 11(a)(ii) hereof, 
a majority of the Board of Directors then in office may suspend the 
exercisability of the Rights for a period of up to sixty (60) days following 
the date on which the event described in Section 11(a)(ii) shall have 
occurred to the extent that such directors have not determined whether to 
exercise their rights of election under this Section 11(a)(iii).  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.

     (b)     If the Company shall fix a record date for the issuance of 
rights, options or warrants to all holders of Preferred Stock entitling them 
(for a period expiring within forty-five (45) calendar days after such record 
date) to subscribe for or purchase Preferred Stock (or shares having the same 
or more favorable 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 per share of 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 (as defined in Section 11(d)) 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 to be offered (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 in a consideration 
part or all of which shall be in a form

                                       -14-
[PAGE]

other than cash, the value of such consideration shall be determined 
reasonably and with good faith to the holders of Rights by the Board of 
Directors of the Company, whose determination shall be described in a 
statement filed with the Rights Agent and shall be binding on the Rights 

Agent and conclusive for all purposes.  Shares of Preferred Stock owned by 
or held for the account of the Company shall not be 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)     If the Company shall fix a record date for the making of 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 
(other than a regular quarterly  cash dividend out of the earnings or 
retained earnings of the Company), 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)), 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 (as defined in Section 11(d)) per share of 
Preferred Stock on such record date, less the fair market value (as 
determined reasonably and with good faith to the holders of Rights by the 
Board of Directors of the Company, whose determination shall be described in 
a statement filed with the Rights Agent and shall be binding on the Rights 
Agent and  conclusive for all purposes) of the portion of the cash, assets or 
evidences of indebtedness so to be distributed or of such subscription rights 
or warrants distributable in respect of one share of Preferred Stock and the 
denominator of which shall be the current market price (as defined in Section 
11(d)) per share of the 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 again be adjusted to be 
the Purchase Price which would be in effect if such record date had not been 
fixed.

     (d)     (i)     For the purpose of any computation hereunder, other than 
in Section 11(a)(iii), 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 such Common Stock for the thirty (30) consecutive Trading Days (as 
such term is hereinafter defined) immediately prior to such date; provided, 
however, that in the event that the current per share market price of the 
Common Stock is determined during a period following the announcement by the 
issuer of such Common Stock of (A) a dividend or distribution on such Common 
Stock payable in shares of such Common Stock or securities convertible into 
shares of such Common Stock or (B) any 

                                       -15-
[PAGE]

subdivision, combination or reclassification of such Common Stock, and prior 
to the expiration of thirty (30) Trading Days after the ex-dividend date for 
such dividend or distribution, or the record date for such subdivision, 
combination or reclassification, then, and in each such case, the "current 
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 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 the Nasdaq National 
Market 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 
reasonably and with 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 determined 
reasonably and with good faith to the holders of Rights by the Board of 
Directors of the Company, whose determination shall be described in a 
statement filed with the Rights Agent and shall be binding on the Rights 
Agent.

     (ii)     For the purpose of any computation hereunder, the "current 
market price" per share (or one one-ten thousandth of a share) of Preferred 
Stock shall be determined in the same manner as set forth above for the 
Common Stock in Section 11(d) (other than the last sentence thereof).  If the 
current market price per share (or one one-ten thousandth of a share) of 
Preferred Stock cannot be determined in the manner provided above or if the 
Preferred Stock is not publicly held or listed or traded in a manner 
described in Section 11(d)(i), the "current market price" per share of 
Preferred Stock shall be conclusively deemed to be an amount equal to 10,000 
 (as such number may be appropriately adjusted for such events as stock 
splits, stock dividends 

                                       -16-
[PAGE]

and recapitalization with respect to the Common Stock occurring after the 
date of this Agreement) multiplied by the current market price per share of 
the Common Stock and the "current market price" per one one-ten thousandth 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 (1%) 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 thousandth of a share of Common 
Stock or other share or one-ten thousand 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 (3) years from the date of the 
transaction which mandates such adjustment or (ii) the Expiration Date.

     (f)     If as a result of any provision of Section 11(a), the holder of 
any Right thereafter exercised shall become entitled to receive any shares of 
capital stock of the Company other than Preferred Stock, thereafter the 
number of such other shares so receivable upon exercise of any Right shall be 
subject to adjustment from time to time in a manner and on terms as nearly 
equivalent as practicable to the provisions with respect to the shares 
contained in Section 11(a) through (c), inclusive, and the provisions of 
Sections 7, 9, 10, 13 and 15 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 Section 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 
one-ten thousandths of a share of Preferred Stock (calculated to the 

                                       -17-
[PAGE]

nearest one-millionth) obtained by (i) multiplying (x) the number of one one-
ten thousandths of a share of Preferred Stock covered by a Right immediately 
prior to this adjustment by (y) the Purchase Price in effect immediately 
prior to such adjustment of the Purchase Price and (ii) dividing the product 
so obtained by the Purchase Price in effect immediately after such adjustment 
of the Purchase Price.

     (i)     The Company may elect on or after the date of any adjustment of 
the Purchase Price to adjust the number of Rights, in substitution for any 
adjustment in the number of 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 one one-ten 
thousandths of a share 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 one millionth) 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 Rights Certificates have been issued, shall be at 
least ten (10) days later than the date of the public announcement.  If 
Rights 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 Rights 
Certificates on such record date Rights Certificates evidencing, subject to 
Section 15 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 Rights Certificates held by such holders prior to the 
date of adjustment, and upon surrender thereof, if required by the Company, 
new Rights Certificates evidencing all the Rights to which such holders shall 
be entitled after such adjustment.  Rights 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 Rights 
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 Rights 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 Rights Certificates issued hereunder.

                                       -18-
[PAGE]


     (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 securities issuable upon exercise of 
the Rights, the Company shall take any corporate action which may, in the 
opinion of its counsel, be necessary in order that the Company may validly 
and legally issue fully paid and nonassessable shares of Preferred Stock, 
Common Stock or other securities 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, if any, of a share of 
Common Stock of the 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 issuing 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 upon the occurrence of the 
event requiring such adjustment.

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

     (n)     Anything in this Agreement to the contrary notwithstanding, in 
the event that the Company shall at any time after the date of this Agreement 
and prior to the Distribution Date (i) declare a dividend on the outstanding 
shares of Common Stock payable in shares of Common Stock, (ii) subdivide the 
outstanding Common Stock, (iii) combine the outstanding Common Stock into a 
smaller number of shares, or (iv) issue any shares of its capital stock in a 
reclassification of the outstanding Common Stock, the number of Rights 
associated with each share of Common Stock then outstanding, or issued or 
delivered thereafter but prior to the Distribution Date, shall be 
proportionately adjusted so that the number of Rights thereafter associated 
with each share of Common Stock following any such event shall equal the 
result obtained by multiplying the number of Rights associated with each 
share of Common 

                                       -19-
[PAGE]

Stock immediately prior to such event by a fraction the numerator of which 
shall be the total number of shares of Common Stock outstanding immediately 
prior to the occurrence of the event and the denominator of which shall be 
the total number of shares of Common Stock outstanding immediately following 
the occurrence of such event.

     (o)     The exercise of Rights under Section 11(a)(ii) shall only result 
in the loss of rights under Section 11(a)(ii) to the extent so exercised and 
shall not otherwise affect the rights represented by the Rights under this 
Rights Agreement, including the rights represented by Section 13.

     12.     Certificate of Adjusted Purchase Price or Number of Shares.  
Whenever an adjustment is made as provided in  Sections 11 and 13 hereof, the 
Company shall (a) promptly prepare a certificate setting forth such 
adjustment and a brief statement of the facts accounting for such adjustment, 
(b) promptly file with the Rights Agent and with each transfer agent for the 
Preferred Stock and the Common Stock a copy of such certificate and (c) mail 
a brief summary thereof to each holder of a Rights Certificate in accordance 
with Section 26 hereof.  The Rights Agent shall be fully protected in relying 
on any such certificate and on any adjustment therein contained and shall not 
be deemed to have knowledge of any adjustment unless and until it shall have 
received such certificate.

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

     (a)     In the event that, following the Stock Acquisition Date, 
directly or indirectly, (x) the Company shall consolidate with, or merge with 
and into, any other Person, (y) any Person shall consolidate with the 
Company, or merge with and into the Company and the Company shall be the 
continuing or surviving corporation of such merger (other than, in the case 
of either transaction described in (x) or (y), a merger or consolidation 
which 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 merger or consolidation), or (z) the Company shall sell, 
mortgage or otherwise transfer (or one or more of its subsidiaries shall 
sell, mortgage or otherwise transfer), in one or more transactions, assets or 
earning power aggregating more than fifty 

                                       -20-
[PAGE]

percent (50%) of the assets or earning power of the Company and its 
subsidiaries (taken as a whole) to any other Person, then, and in each such 
case, proper provision shall be made so that (i) following the Distribution 
Date, each holder of a Right (other than as provided in Section 7(e) hereof) 
shall have the right to receive, upon the exercise thereof at the then 
current Purchase Price in accordance with the terms of this Agreement, such 
number of shares of freely tradable Common Stock of the Principal Party (as 
hereinafter defined), free and clear of liens, rights of call or first 
refusal, encumbrances or other adverse claims, as shall be equal to the 
result obtained by (x) multiplying the then current Purchase Price by the 
number of one one-ten thousandths of a share of Preferred Stock for which a 
Right is then exercisable (without taking into account any adjustment 
previously made pursuant to Section 11(a)(ii) hereof) and (y) dividing that 
product by fifty percent (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; (ii) such Principal Party shall thereafter be liable for, and shall 
assume, by virtue of such consolidation, merger, sale or transfer, all the 
obligations and duties of the Company pursuant to this Agreement; (iii) the 
term "Company" shall thereafter be deemed to refer to such Principal Party, 
it being specifically intended that the provisions of Section 11 hereof shall 
apply to such Principal Party; and (iv) such Principal Party shall take such 
steps (including, but not limited to, the reservation of a sufficient number 
of shares of its Common Stock in accordance with Section 9 hereof) in 
connection with such consummation as may be necessary to assure that the 
provisions hereof shall thereafter be applicable, as nearly as reasonably may 
be, in relation to its shares of Common Stock thereafter deliverable upon the 
exercise of the Rights.

     (b)     "Principal Party" shall mean:

     (i)     in the case of any transaction described in (x) or (y) of the 
first sentence of this Section 13, the Person that is the issuer of any 
securities into which shares of Common Stock of the Company are  converted in 
such merger or consolidation, and if no securities are so issued, the Person 
that is the other party to the merger or consolidation (including, if 
applicable, the Company, if it is the surviving corporation); and

     (ii)     in the case of any transaction described in (z) of the first 
sentence in this Section 13, the Person that is the party receiving the 
greatest portion of the assets or earning power transferred pursuant to such 
transaction or transactions;

     provided, however, that in any such case, (A) if the Common Stock of 
such Person is not at such time and has not been continuously over the 
preceding twelve (12) month period 

                                       -21-
[PAGE]

registered under Section 12 of the Exchange Act, and such Person is a direct 
or indirect subsidiary or Affiliate of another Person, "Principal Party" 
shall refer to such other Person; (B) in case such Person is a subsidiary, 
directly or indirectly, or Affiliate of more than one Person, the Common 
Stock of two or more of which are and have been so registered, "Principal 
Party" shall refer to whichever of such Persons is the issuer of the Common 
Stock having the greatest aggregate market value; and (C) in case 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 (A) and (B) above shall apply to each of the chains of 
ownership having an interest in such joint venture as if such party were a 
"Subsidiary" of both or all of such joint venturers and the Principal Parties 
in each such chain shall bear the obligations set forth in this Section 13 in 
the same ratio as their direct or indirect interests in such Person bear to 
the total of such interests.

     (c)     The Company shall not consummate any such consolidation, merger, 
sale or transfer 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 each Principal Party 
and each other Person who may become a Principal Party as a result of such 
consolidation, merger, sale or  transfer shall have executed and delivered to 
the Rights Agent a supplemental agreement providing for the terms set forth 
in paragraphs (a) and (b) of this Section 13 and further providing that, as 
soon as practicable after the date of any consolidation, merger, sale or 
transfer of assets mentioned in paragraph (a) of this Section 13, the 
Principal Party at its own expense shall:

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

          (ii)     use its best efforts to qualify or register the Rights and 
the securities purchasable upon exercise of the Rights under the blue sky 
laws of such jurisdictions as may be necessary or appropriate; and

          (iii)     deliver to holders of the Rights historical financial 
statements for the Principal Party and each of its Affiliates which comply in 
all  material respects with the requirements for registration on Form 10 
under the Exchange Act.

                                       -22-
[PAGE]


The provisions of this Section 13 shall similarly apply to successive mergers 
or consolidations or sales or other transfers.  The rights under this Section 
13 shall be in addition to the rights to exercise Rights and adjustments 
under Section 11(a)(ii) and shall survive any exercise thereunder.

     (d)     Notwithstanding anything in this Agreement to the contrary, 
Section 13 shall not be applicable to a transaction described in 
subparagraphs (x) and (y) of Section 13(a) if (i) such transaction is 
consummated with a Person or Persons who acquired shares of Common Stock 
pursuant to a Permitted Offer (or a wholly owned subsidiary of any such 
Person or Persons), (ii) the price per share of Common Stock offered in such 
transaction is not less than the price per share of Common Stock paid to all 
holders of Common Stock whose shares were purchased pursuant to such 
Permitted Offer and (iii) the form of consideration being offered to the 
remaining holders of Common Stock pursuant to such transaction is the same as 
the form of consideration paid pursuant to such Permitted Offer.  Upon 
consummation of any such transaction contemplated by this subsection (d), all 
Rights hereunder shall expire.

     14.     Additional Covenants.

     (a)     The Company covenants and agrees that after the Stock 
Acquisition Date it shall not (i) consolidate with, (ii) merge with or into, 
or (iii) sell or transfer to any other Person, in one or more transactions, 
assets or earning power aggregating more than fifty percent (50%) of the 
assets or earning power of the Company and its subsidiaries taken as a whole, 
if at the time of or after such consolidation, merger or sale there are any 
charter or bylaw provisions or any rights, warrants or other instruments 
outstanding or any other action taken which would diminish or otherwise 
eliminate the benefits intended to be afforded by the Rights.  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.

     (b)     The Company covenants and agrees that, after the Stock 
Acquisition Date, it will not, except as permitted by Section 24 hereof, take 
any action the purpose or effect of which is to diminish or otherwise 
eliminate the benefits intended to be afforded by the Rights.

     15.     Fractional Rights and Fractional Shares.

     (a)     The Company shall not be required to issue fractions of Rights, 
except prior to the Distribution Date as provided in Section 11(n), or to 
distribute Rights Certificates which  evidence fractional Rights.  In lieu of 
such fractional Rights, there shall be paid to the registered holders of the 
Rights 

                                       -23-
[PAGE]

Certificates with regard to which such fractional Rights would 
otherwise be issuable, an amount in cash equal to the same fraction of the 
current market value of a whole Right.  For the purposes of this Section 
15(a), the current market value of a whole Right shall be the closing price 
of the Rights for the Trading Day immediately prior to the date on which such  
fractional Rights would have been otherwise issuable.  The closing price of 
the Rights for any day shall be the last sale price, the last quoted price 
or, if not so quoted, the average of the high bid and low asked prices in the 
over-the-counter market, as reported by the Nasdaq National Market or such 
other system then in use or, if on any such date the Rights are not quoted by 
any such organization, the average of the closing bid and asked prices as 
furnished by a professional market maker making a market in the Rights 
selected by the Board of Directors of the Company.  If on any such date no 
such market maker is making a market in the Rights the fair value of the 
Rights on such date as determined reasonably and with good faith to the 
holders of Rights by the Board of Directors of the Company shall be used and 
shall be binding on the Rights Agent.

     (b)     The Company shall not be required to issue fractions of shares 
of Preferred Stock (other than fractions which are integral multiples of one 
one-ten thousandth 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 one-ten 
thousandth of a share of Preferred Stock).  Fractions of shares of Preferred 
Stock in integral multiples of one one-ten thousandth of a share of Preferred 
Stock may, at the election of the Company, be evidenced by depositary 
receipts, pursuant to an appropriate agreement between the Company and a 
depositary selected by it, provided that such agreement shall provide that 
the holders of such depositary receipts shall have all the rights, privileges 
and preferences to which they are entitled as beneficial owners of the shares 
of Preferred Stock represented by such depositary receipts.  In lieu of 
fractional shares of Preferred Stock that are not integral multiples of one 
one-ten thousandth of a share of Preferred Stock, the Company may pay to the 
registered holders of Rights 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 one-ten thousandth of a share of Preferred 
Stock.  For purposes of this Section 15(b), the current market value of one 
one-ten thousandth of a share of Preferred Stock shall be one one-ten 
thousandth of the closing price of a share of Preferred 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 one of the transactions or events 
specified in Section 11 or Section 13 giving rise to the right to receive 
common stock equivalents (other than Preferred Stock) or other securities 
upon the exercise of a Right, the Company shall not be required to issue 
fractions of shares or 

                                       -24-
[PAGE]

units of such common stock equivalents or other securities upon exercise of 
the Rights or to distribute certificates which evidence fractional shares of 
such common stock equivalents or other securities.  In lieu of fractional 
shares or units of such common stock equivalents or other securities, the 
Company may pay to the registered holders of Rights 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 such common 
stock equivalent or other securities.  For purposes of this Section 15(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 and, if such common stock equivalent is not traded, each such 
common stock equivalent shall have the value of one one-ten thousandth of a 
share of Preferred Stock.

     (d)     Except as otherwise expressly provided herein, the holder of a 
Right by the acceptance of the Rights expressly waives his right to receive 
any fractional Rights or any  fractional shares (other than, in the case of 
Preferred Stock, fractions which are integral multiples of one one-ten 
thousandth of a share of Preferred Stock) upon exercise of a Right.

     16.     Rights of Action.  All rights of action in respect of this 
Agreement, except those rights of action vested in the Rights Agent pursuant 
to Section 21, are vested in the respective registered holders of the Rights 
Certificates (and, prior to the Distribution Date, the registered holders of 
the Common Stock); and any registered holder of any Rights 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 Rights 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 to enforce, or otherwise act in respect of, 
his right to exercise the Rights evidenced by such Rights Certificate in the 
manner provided in such Rights Certificate and in this Agreement.  Without 
limiting the foregoing or any remedies available to the holders of Rights, it 
is specifically acknowledged that the holders of Rights would not have an 
adequate remedy at law for any breach of this Agreement and shall be entitled 
to specific performance of the obligations hereunder and injunctive relief 
against actual or threatened violations of the obligations hereunder of any 
Person subject to this 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 Agreement.

     17.     Agreement of Rights 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:

                                       -25-
[PAGE]


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

     (b)     after the Distribution Date, the Rights Certificates are 
transferable only on the registry books of the Rights Agent if surrendered at 
the principal office of the Rights Agent, duly endorsed or accompanied by a 
proper instrument of transfer; and

     (c)     the Company and the Rights Agent may deem and treat the Person 
in whose name a Rights 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 Rights Certificates or the associated Common 
Stock certificate made by anyone other than the Company or the Rights Agent) 
for all purposes whatsoever, and neither the Company nor the Rights Agent 
shall be affected by any notice to the contrary.

     18.     Rights Certificate Holder Not Deemed a Shareholder.  No holder, 
as such, of any Rights Certificate shall be entitled to vote, receive 
dividends or be deemed for any purpose the holder of the shares of Preferred 
Stock, Common Stock or any other securities of the Company which may at any 
time be issuable upon exercise of the Rights represented thereby, nor shall 
anything contained herein or in any Rights Certificate be construed to confer 
upon the holder of any Rights Certificate, as such, any of the rights of a 
shareholder of the Company or any right to vote for the election of directors 
or upon any matter submitted to shareholders at any meeting thereof, or to 
give or withhold consent to any corporate action, or to receive notice of 
meetings or other actions affecting shareholders (except as provided in 
Section 25 hereof), or to receive dividends or subscription rights, or 
otherwise, until the Right or Rights evidenced by such Rights Certificate 
shall have been exercised in accordance with the provisions thereof.

     19.     Concerning the Rights Agent.  The Company agrees to pay to the 
Rights Agent reasonable compensation for all services rendered by it 
hereunder and, from time to time, on demand of the Rights Agent, its 
reasonable expenses and counsel fees and disbursements and other 
disbursements incurred in the administration and execution of this Agreement 
and the exercise and performance of its duties hereunder.  The Company also 
agrees to indemnify the Rights Agent for, and to hold it harmless against, 
any loss, liability, or expense, incurred without negligence, bad faith or 
willful misconduct on the part of the Rights Agent, for anything done or 
omitted by the Rights Agent in connection with the acceptance and 
administration of this Agreement, including the costs and expenses of 
defending against any claim of liability arising therefrom, directly or 
indirectly.

     The Rights Agent shall be protected and shall incur no liability for or 
in respect of any action taken, suffered or 

                                       -26-
[PAGE]

omitted by it in connection with its administration of this Agreement in 
reliance upon any Rights Certificate or certificate for Common Stock or for 
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,  verified or 
acknowledged, by the proper Person or Persons.

     20.     Merger or Consolidation or Change of Name of Rights Agent.  Any 
corporation or other entity into which the Rights Agent or any successor 
Rights Agent may be merged or with which it may be consolidated, or any 
corporation or other entity resulting from any merger or consolidation to 
which the Rights Agent or any successor Rights Agent shall be a party, or any 
corporation or other entity succeeding to the corporate trust or shareholder 
services business of the Rights Agent or any successor Rights Agent, shall be 
the successor to the Rights Agent under this Agreement without the execution 
or filing of any paper or any further act on the part of any of the parties 
hereto, provided that such corporation or other entity would be eligible for 
appointment as a successor Rights Agent under the provisions of Section 22 
hereof.  In case at the time such successor Rights Agent shall succeed to the 
agency created by this Agreement, any of the Rights 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 
Rights Certificates so countersigned; and in case at that time any of the 
Rights Certificates shall not have been countersigned, any successor Rights 
Agent may countersign such Rights Certificates either in the name of the 
predecessor or in the name of the successor Rights Agent; and in all such 
cases such Rights Certificates shall have the full force provided in the 
Rights Certificates in this Agreement.

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

     21.     Duties of Rights Agent.  The Rights Agent undertakes the duties 
and obligations imposed by this Agreement upon the following terms and 
conditions, by all of which the Company and the holders of Rights 
Certificates, by their acceptance thereof, shall be bound:

                                       -27-
[PAGE]


     (a)     The Rights Agent may consult with legal counsel selected by it 
(who may be legal counsel for the Company), and the opinion of such counsel 
shall be full and complete authorization and protection to the Rights Agent 
as to any action taken or omitted by it in good faith and in accordance with 
such opinion.

     (b)     Whenever in the performance of its duties under this 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 a 
certificate signed by the President, any Vice President, the Chief Financial 
Officer, 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 taken or suffered in good 
faith by it under the provisions of this Agreement in reliance upon such 
certificate.

     (c)     The Rights Agent shall be liable hereunder only for its own 
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 Agreement or in the 
Rights Certificates (except as to the fact that it has countersigned the 
Rights Certificates) 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 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 Rights Certificate (except its 
countersignature thereof); nor shall it be responsible for any breach by the 
Company of any covenant or condition contained in this Agreement or in any 
Rights Certificate; nor shall it be responsible for any adjustment required 
under the provisions of Section 11 or 13 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 Rights Certificates after 
receipt of certificate pursuant to Section 12 describing any such 
adjustment); nor shall it be responsible for any determination by the Board 
of Directors of the Company of the current market value of the Rights or 
Preferred Stock or Common Stock pursuant to the provisions of Section 15 
hereof; 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 Preferred Stock or other securities to be issued pursuant to this 
Agreement or any Rights Certificate or as to whether any shares of Preferred 
Stock 

                                       -28-
[PAGE]

or other securities will, when so 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 Agreement.

     (g)     The Rights Agent is hereby authorized and directed to accept 
instructions with respect to the performance of its duties hereunder and 
certificates delivered pursuant to any provision hereof from the President, 
any Vice President, the Secretary, any Assistant Secretary, the Chief 
Financial Officer of the Company, and is authorized 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 with respect to its duties or obligations under 
this Rights Agreement and the date on and/or after which such action shall be 
taken or omitted and the Rights Agent shall not be liable for any action 
taken or omitted in accordance with a proposal included in any such 
application on or after the date specified therein (which date shall not be 
less than three (3) Business Days after the date any such officer actually 
receives such application, unless any such officer shall have consented in 
writing to an earlier date) unless, prior to taking or omitting any such 
action, the Rights Agent has received written instructions in response to 
such application specifying the action to be taken or omitted.

     (h)     The Rights Agent and any shareholder, director, officer or 
employee of the Rights Agent may buy, sell or deal in any of the Rights or 
other securities of the Company or become pecuniarily interested in any 
transaction in which the Company may be interested, or contract with or lend 
money to the Company or otherwise act as fully and freely as though it were 
not Rights Agent under this Agreement.  Nothing herein shall preclude the 
Rights Agent from acting in any other capacity for the Company or for any 
other legal entity.

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

                                       -29-
[PAGE]


     (j)     No provision of this Agreement shall require the Rights Agent to 
expend or risk its own funds or otherwise incur any financial liability in 
the performance of any of its duties hereunder or in the exercise of its 
rights if 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 Rights Certificate surrendered to the 
Rights Agent for exercise or transfer, the Certificate attached to the form 
of assignment or form of election to purchase, 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.

     22.     Change of Rights Agent.  The Rights Agent or any successor 
Rights Agent may resign and be discharged from its duties under this 
Agreement upon thirty (30) days notice in writing mailed to the Company and 
to each transfer agent of the Common Stock and Preferred Stock by registered 
or certified mail, and to holders of the Rights Certificates by first-class 
mail.  The Company may remove the Rights Agent or any successor Rights Agent 
upon thirty (30) days notice in writing, mailed to the Rights Agent or 
successor Rights Agent, as the case may be, and to each transfer agent of the 
Common Stock and Preferred Stock by registered or certified mail, and to the 
holders of the Rights 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.  If the Company shall 
fail to make such appointment within a period of thirty (30) days after 
giving notice of such removal or after it has been notified in writing of 
such resignation or incapacity by the resigning or incapacitated Rights Agent 
or by the holder of a Rights Certificate (who shall, with such notice, submit 
his Rights Certificate for inspection by the Company), then the registered 
holder of any Rights 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 or other entity organized and doing business under the laws of 
the United States or of the State of New York or the State of California (or 
of any other state of the United States so long as such corporation or other 
entity is authorized to do business as a banking institution in the State of 
New York or the State of California), in good standing, having a principal 
office in the State of New York or the State of California, which is 
authorized under such laws to exercise corporate trust or shareholder 
services 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 of 
a corporation or other 

                                       -30-
[PAGE]

entity 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 mail notice thereof in writing to the 
predecessor Rights Agent and each transfer agent of the Common Stock and 
Preferred Stock, and mail a notice thereof in writing to the registered 
holders of the Rights Certificates.  Failure to give any notice provided for 
in this Section 22, 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.

     23.     Issuance of New Rights Certificates.  Notwithstanding any of the 
provisions of this Agreement or of the Rights to the contrary, the Company 
may, at its option, issue new Rights 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 or other securities or property purchasable under the Rights 
Certificates made in accordance with the provisions of this 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 (a) shall, with respect to shares of Common Stock so 
issued or sold pursuant to the exercise of stock options or otherwise under 
any employee plan or arrangement, which plan or arrangement is existing as of 
the Distribution Date, or upon the exercise, conversion or exchange of any 
other securities issued by the Company on or prior to the Distribution Date, 
and (b) may, in any other case, if deemed necessary or appropriate by the 
Board of Directors of the Company, issue Rights Certificates representing the 
appropriate number of Rights in connection with such issuance or sale; 
provided, however, that (i) no such Rights Certificates 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 Rights Certificates would be 
issued, and (ii) no such Rights Certificates shall be issued if, and to the 
extent that appropriate adjustment shall otherwise have been made in lieu of 
the issuance thereof.

     24.     Redemption, Termination and Exchange.

     (a)     (i)     The Board of Directors of the Company may, at its 
option, at any time prior to the earlier of (x) the Stock Acquisition Date or 
(y) 5:00 p.m., Pacific time, on the Final Expiration Date, redeem all but not 
less than all of the then 

                                       -31-
[PAGE]

outstanding Rights at a redemption price of $.001 per Right, appropriately 
adjusted to reflect any stock split, stock dividend or similar transaction 
occurring after the date hereof (such redemption price being hereinafter 
referred to as the "Redemption Price").

     (ii)     In addition, and notwithstanding the provisions of Section 
24(a)(i), the Board of Directors of the Company may redeem all but not less 
than all of the then outstanding Rights at the Redemption Price following the 
Stock Acquisition Date but prior to any event described in Section 13(a) 
either (x) in connection with any event specified in Section 13(a) 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 such holders) an 
Acquiring Person or an Affiliate or Associate thereof or any other Person in 
which such Acquiring Person or Affiliate or Associate thereof has any 
interest, or any other Person acting directly or indirectly on behalf of or 
in association with any such Acquiring Person or Affiliate or Associate 
thereof, or (y) following the occurrence of an event set forth in, and the 
expiration of any period during which the holder of Rights may exercise the 
rights under, Section 11(a)(ii) if and for as long as any Acquiring Person 
having triggered such event is not thereafter the Beneficial Owner of 
securities representing fifteen percent (15%) or more of the outstanding 
shares, and at the time of redemption there are no other Persons who are 
Acquiring Persons.

     (b)     In the case of a redemption permitted under Section 24(a)(i), 
immediately upon the action of the Board of Directors of the Company ordering 
the redemption of the Rights, evidence of which shall have been filed with 
the Rights Agent 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.  In the case 
of a redemption permitted only under Section 24(a)(ii), evidence of which 
shall have been filed with the Rights Agent, the right to exercise the Rights 
will terminate and represent only the right to receive the Redemption Price 
only after ten (10) Business Days following the giving of notice of such 
redemption to the holders of such Rights if no event set forth in Section 
11(a)(ii) shall have occurred, and, if such event shall have occurred, upon 
the later of ten (10) Business Days following the giving of such notice or 
the expiration of any period during which the rights under Section 11(a)(ii) 
may be exercised.  Within ten (10) days after the action of the Board of 
Directors ordering any such redemption of the Rights, the Company shall give 
notice of such redemption to the Rights Agent and the holders of the then 
outstanding Rights by mailing such notice to the Rights Agent and to all such 
holders at their last addresses as they appear upon the registry books of the 
Rights Agent or, prior to the Distribution Date, on the registry books of the 
Transfer Agent for the Common Stock.  Any notice which is mailed in the 
manner herein provided shall be deemed given, whether or not the holder 
receives 

                                       -32-
[PAGE]

the notice.  Each such notice of redemption will state the method by which 
the payment of the Redemption Price will be made.

     In the case of a redemption permitted under Section  24(a)(i) or (ii), 
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 Rights Certificates shall be null and void 
without any further action by the Company.

     (c)     (i)     Subject to the limitations of applicable law, the Board 
of Directors of the Company may, at its option, at any time after any Person 
becomes an Acquiring Person, exchange all or part of the then outstanding and 
exercisable Rights (which shall not include Rights that have become void 
pursuant to the provisions of Section 7(e) hereof) for (A) 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 date hereof (the "Exchange Shares") or (B) 
Substitute Consideration (as that term is defined below).  The Board of 
Directors may determine, in its sole discretion, whether to deliver Exchange 
Shares or Substitute Consideration.  Notwithstanding the foregoing, the Board 
of Directors shall not be empowered to effect such exchange at any time after 
any Person (other than the Company, any subsidiary of the Company, any 
employee benefit plan of the Company or any such subsidiary, or any entity 
holding Common Stock for or pursuant to the terms of any such plan), together 
with all Affiliates and Associates of such Person, becomes the Beneficial 
Owner of fifty percent (50%) or more of the Common Stock then outstanding.

     (ii)     In the event the Board of Directors shall determine to deliver 
Substitute Consideration in exchange for Rights, the Company shall (A) 
determine the value of the Exchange Shares (the "Exchange Value"), and (B) 
with respect to each Right to be exchanged, make adequate provision to 
substitute for Exchange Shares the following (the "Substitute 
Consideration"):  (v) cash, (w) Common Stock or common stock equivalents (as 
that term is defined in Section 11(a)(iii) hereof) or Preferred Stock or 
equivalent preferred stock (as that term is defined in Section 11(b) hereof), 
(x) debt securities of the Company, (y) other assets, or (z) any combination 
of the foregoing, having an aggregate value equal to the Exchange Value, 
where such aggregate value has been determined by the Board of Directors of 
the Company based upon the advice of a nationally recognized investment 
banking firm selected by the Board of Directors of the Company.  For purposes 
of this Section 24(c), the value of a share of Common Stock shall be the 
current market price (as determined pursuant to Section 11(d) hereof) per 
share of Common Stock on the day that is the later of (x) the first 
occurrence of an event described in 

                                       -33-
[PAGE]

Section 11(a)(ii) hereof and (y) the date on which the Company's right of 
redemption pursuant to Section 24(a) expires; and the value of any common 
stock equivalent shall be deemed to have the same value as the Common Stock 
on such date.

     (iii)     Immediately upon the action of the Board of Directors of the 
Company ordering the exchange of any Rights pursuant to this Section 24(c), 
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 Exchange Shares or Substitute Consideration for 
each Right exchanged by such holder.  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 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 7(e) 
hereof) held by each holder of Rights.

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

     (v)     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 Rights 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 
Section 24(c)(v), the current market value of a whole share of Common Stock 
shall be the closing price of a share of  Common Stock (as determined 
pursuant to Section 11(d) hereof) for the Trading Day immediately prior to 
the date of exchange pursuant to this Section 24(c).

     25.     Notice of Certain Events.  In case the Company shall propose (a) 
to pay any dividend payable in stock of any class to the holders of Preferred 
Stock or to make any other distribution to the holders of Preferred Stock 
(other than a regular  quarterly 

                                       -34-
[PAGE]

dividend out of earnings or retained earnings of the Company) or (b) to offer 
to the holders of Preferred Stock rights or warrants to subscribe for or to 
purchase any additional shares of Preferred Stock or shares of stock of any 
class or any other securities, rights or options, or (c) to effect any 
reclassification of its Preferred Stock (other than a reclassification 
involving only the subdivision of outstanding shares of Preferred Stock), or 
 (d) to effect any consolidation or merger into or with, or to effect any 
sale or other transfer (or to permit one or more of its subsidiaries to 
effect any sale or other transfer), in one or more transactions, of more than 
fifty percent (50%) of the assets or earning power of the Company and its 
subsidiaries (taken as a whole) to, any other Person, or (e) to effect the 
liquidation, dissolution or winding up of the Company, then, in each such 
case, the Company shall give to each holder of a Rights Certificate, in 
accordance with Section 26 hereof, a notice of such proposed action, which 
shall specify the record date for the purposes of such stock dividend, 
distribution of rights or warrants, or the date on which such 
reclassification, consolidation, merger, sale, transfer, liquidation, 
dissolution, or winding up is to take place and the date of participation 
therein by the holders of the shares 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 (a) or (b) above at least twenty (20) days prior to the 
record date for determining holders of the shares of Preferred Stock for 
purposes of such action, and in the case of any such other action, at least 
twenty (20) days prior to the date of the taking of such proposed action or 
the date of participation therein by the holders of the shares of Preferred 
Stock whichever shall be the earlier.

In case any of the events set forth in Section 11(a)(ii) or 13(a) of this 
Agreement shall occur, then, in any such case, the Company or the Principal 
Party, as the case may be, shall as soon as practicable thereafter give to 
each holder of a Rights Certificate, in accordance with Section 26 hereof, a 
notice of the occurrence of such event, which shall specify the event and the 
consequences of the event to holders of Rights under Section 11(a)(ii) or 
13(a) hereof, as the case may be.

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

               Agouron Pharmaceuticals, Inc.
               10350 North Torrey Pines Road
               La Jolla, CA  92037
               Attention:  President

                                       -35-
[PAGE]


     Subject to the provisions of Section 22, any notice or demand authorized 
by this Agreement to be given or made by the Company or by the holder of any 
Rights Certificate to or on the Rights Agent shall be sufficiently given or 
made if sent by first-class mail, postage prepaid, or sent by nationwide 
overnight delivery, addressed (until another address is filed in writing with 
the Company) as follows:

               Chase Mellon Shareholder Services, L.L.C.
               85 Challenger Road
               Ridgefield Park, NJ 07660
               Attention:  Compliance Area

     Notices or demands authorized by this Agreement to be given or made by 
the Company or the Rights Agent to the holder of any Rights Certificate shall 
be sufficiently given or made if sent by first-class mail, postage prepaid, 
or sent by nationwide overnight delivery, addressed to such holder at the 
address of such holder as shown on the registry books of the Company.

     Each such notice or demand shall be effective (i) if given by mail, 
three (3) days after the notice or demand is deposited in the mails with 
first class postage prepaid, addressed as specified herein, (ii) if given by 
nationwide overnight delivery, the date of delivery at the address specified 
herein or (iii) if given by any other means, the date of delivery at the 
address specified herein.

     27.     Supplements and Amendments.  The Company and the Rights Agent 
may from time to time supplement or amend this Agreement without approval of 
any holders of Rights or Rights Certificates in order (a) to cure any 
ambiguity, (b) to correct or supplement any provision contained herein which 
may be defective or inconsistent with any other provisions herein, (c) prior 
to the Distribution Date, to change or supplement any provision hereunder in 
any manner which the Company may deem necessary or desirable, or (d) on or 
following the Distribution Date, to change or supplement any provision 
hereunder in any manner which the Company may deem necessary or desirable and 
which shall not adversely affect the interests of the holders of Rights 
Certificates.  Upon the delivery of a certificate from an appropriate officer 
of the Company which states that the  proposed supplement or amendment is in 
compliance with the terms of this Section 27, the Rights Agent shall execute 
such supplement or amendment unless the Rights Agent shall have determined in 
good faith that such supplement or amendment would adversely affect its 
interests under this Agreement.  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.

     28.     Determination and Actions by the Board of Directors, etc.  For 
all purposes of this Agreement, any calculation of the number of shares of 
Common Stock outstanding at any particular 

                                       -36-
[PAGE]

time, including for purposes of determining the particular percentage of such 
outstanding shares of Common Stock or any other securities 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 of this Agreement.  Except as 
otherwise provided herein, the Board of Directors of the Company shall have 
the exclusive power and authority to administer this Agreement and to 
exercise all rights and powers  specifically granted to the Board, or the 
Company, or as may be necessary or advisable in the administration of this 
Agreement, including, without limitation, the right and power to (a) 
interpret the provisions of this Agreement, and (b) make all determinations 
deemed necessary or advisable for the administration of this Agreement 
 (including a determination to redeem or not redeem the Rights or to amend 
the Agreement).  All such actions, calculations, interpretations and 
determinations (including, for purposes of clause (y) below, all omissions 
with respect to the foregoing) which are done or made by the Board in good 
faith, shall (x) be final, conclusive and binding on the Company, the Rights 
Agent, the holders of the Rights Certificates and all other parties, and (y) 
not subject the Board to any liability to the holders of the Rights 
Certificates.

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

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

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

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

                                       -37-
[PAGE]


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

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



     IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be 
duly executed and their respective corporate seals to be hereunto affixed and 
attested, all as of the day and year first above written.



Attest:                               AGOURON PHARMACEUTICALS, INC.



    /s/ Peter Johnson                     /s/ Gary E. Friedman
By --------------------------------   By --------------------------------


       President                              Vice President
Title -----------------------------   Title  ----------------------------





Attest:                              CHASE MELLON SHAREHOLDER 
                                     SERVICES, L.L.C.



                                         /s/ Ronald E. Lug
By --------------------------------   By --------------------------------


                                              Vice President
Title -----------------------------   Title  ----------------------------


                                      -38-
[PAGE]

                                   EXHIBIT A
 
                           CERTIFICATE OF DESIGNATION,

                            PREFERENCES AND RIGHTS

                   OF SERIES B PARTICIPATING PREFERRED STOCK

                                     OF

                         AGOURON PHARMACEUTICALS, INC.

     We, Peter Johnson, President, and Gary E. Friedman, Secretary, of 
Agouron Pharmaceuticals, Inc., a corporation organized and existing under the 
General Corporation Law of the State of California, DO HEREBY CERTIFY:

     That pursuant to the authority conferred upon the Board of Directors by 
the Articles of Incorporation of the Corporation, the said Board of Directors 
on November 7, 1996 adopted the following resolution creating a series of two 
thousand (2,000) shares of Preferred Stock designated as Series B 
Participating Preferred Stock:

     RESOLVED, that pursuant to the authority vested in the Board of 
Directors of the Corporation in accordance with the provisions of its 
Articles 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 B Participating Preferred Stock," no par value, and the 
number of shares constituting such series shall be two thousand (2,000). Such 
number of shares may be increased or decreased by resolution of the Board of 
Directors; provided, that no decrease shall reduce the number of shares of 
Series B Participating Preferred Stock to a number less than that of the 
shares then outstanding plus the number of shares issuable upon exercise of 
outstanding rights, options or warrants or upon conversion of outstanding 
securities issued by the Corporation.

     2.     Dividends and Distributions.

     (a)     Subject to the prior and superior rights of the  holders of any 
shares of any series of Preferred Stock ranking prior and superior to the 
shares of Series B Participating Preferred Stock with respect to dividends, 
the holders of shares of Series B Participating Preferred Stock in preference 
to the holders of shares of Common Stock, no par value (the "Common Stock"), 
of the 

                                        A-1
[PAGE]

Corporation and any other junior stock, shall be entitled to receive, 
when, as and if declared by the Board of Directors out of funds legally 
available for the purpose, quarterly dividends payable in cash on the first 
day of March, June, September and December in each year (each such date being 
referred to herein as a "Quarterly Dividend Payment Date"), commencing on the 
first Quarterly Dividend Payment Date after the first issuance of a share or 
fraction of a share of Series B Participating Preferred Stock in an amount 
per share (rounded to the nearest cent) equal to the greater of (i) $100, or 
(ii) subject to the provision for adjustment hereinafter set forth, 10,000 
times the aggregate per share amount of all cash dividends, and 10,000 times 
the aggregate per share amount (payable in kind) of all non-cash dividends or 
other distributions other than a dividend payable in shares of Common Stock 
or a subdivision of the outstanding shares of Common Stock (by 
reclassification or otherwise), declared on the Common Stock, since the 
immediately preceding Quarterly Dividend Payment Date, or, with respect to 
the first Quarterly Dividend Payment Date, since the first issuance of any 
share or fraction of a share of Series B Participating Preferred Stock.  In 
the event the Corporation shall at any time after the close of business on 
November 7, 1996 (the "Rights Declaration Date") (A) declare any dividend on 
Common Stock payable in shares of Common Stock, (B) subdivide the outstanding 
Common Stock, or (C) combine the outstanding Common Stock into a smaller 
number of shares, by reclassification or otherwise, then in each such case 
the amount to which holders of shares of Series B Participating Preferred 
Stock were entitled immediately prior to such event under clause (ii) of the 
preceding sentence shall be adjusted by multiplying such amount by a fraction 
the numerator of which is the number of shares of Common Stock outstanding 
immediately after such event and the denominator of which is the number of 
shares of Common Stock that were outstanding immediately prior to such event.

     (b)     The Corporation shall declare a dividend or distribution on the 
Series B Participating Preferred Stock as provided in paragraph (a) above 
immediately after it declares a dividend or distribution on the Common Stock 
(other than a dividend payable in shares of Common Stock); provided that, in 
the event no dividend or distribution shall have been declared on the Common 
Stock during the period between any Quarterly Dividend Payment Date and the 
next subsequent Quarterly Dividend Payment Date, a dividend of $100 per share 
on the Series B Participating Preferred Stock shall nevertheless be payable 
on such subsequent Quarterly Dividend Payment Date.

     (c)     Dividends shall begin to accrue and be cumulative on outstanding 
shares of Series B Participating Preferred Stock from the Quarterly Dividend 
Payment Date next preceding the date of issue of such shares of Series B 
Participating 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 

                                        A-2
[PAGE]

Dividend Payment Date or is a date after the record date for the 
determination of holders of shares of Series B Participating 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 B Participating 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 B Participating Preferred Stock 
entitled to receive payment of a dividend or distribution declared thereon, 
which record date shall be no more than thirty (30) days prior to the date 
fixed for the payment thereof.

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

     (a)     Subject to the provision for adjustment hereinafter set forth, 
each share of Series B Participating Preferred Stock shall entitle the holder 
thereof to 10,000 votes on all matters submitted to a vote of the 
shareholders 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 into a greater number of shares, or (iii) combine the 
outstanding Common Stock into a smaller number of shares, by reclassification 
or otherwise, then in each such case the number of votes per share to which 
holders of shares of Series B Participating 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 outstanding immediately prior to such event.

     (b)     Except as otherwise provided herein or by law, the holders of 
shares of Series B Participating Preferred Stock and the holders of shares of 
Common Stock shall vote together as one class on all matters submitted to a 
vote of shareholders of the Corporation.

     (c)     (i)     If at any time dividends on any Series B Participating 
Preferred Stock shall be in arrears in an amount equal to six quarterly 
dividends thereon, the occurrence of such contingency shall mark the 
beginning of a period (herein called a "default period") which shall extend 
until such time when all accrued and unpaid dividends for all previous 
quarterly dividend periods and for the current quarterly dividend period on 
all shares of Series B Participating Preferred Stock then outstanding 

                                        A-3
[PAGE]

shall have been declared and paid or set apart for payment.  During each 
default period, all holders of Preferred Stock (including holders of the 
Series B Participating Preferred Stock) with dividends in arrears in an 
amount equal to six quarterly dividends thereon, voting as a class, 
irrespective of series, shall have the right to elect one Director.

(ii)     During any default period, such voting right of the holders of 
Series B Participating Preferred Stock may be exercised initially at a 
special meeting called pursuant to subparagraph (iii) of this Section 3(c) or 
at any annual meeting of shareholders, and thereafter at annual meetings of 
shareholders, provided that neither such voting right nor the right of the 
holders of any other series of Preferred Stock, if any, to increase, in 
certain cases, the authorized number of Directors shall be exercised unless 
the holders of ten percent (10%) in number of shares of Preferred Stock 
outstanding shall be present in person or by proxy.  The absence of a quorum 
of the holders of Common Stock shall not affect the exercise by the holders 
of Preferred Stock of such voting right.  At any meeting at which the holders 
of Preferred Stock shall exercise such voting right initially during an 
existing default period, they shall have the right, voting as a class, to 
elect one Director to fill such vacancy, if any, in the Board of Directors as 
may then exist for one Director or, if such right is exercised at an annual 
meeting, to elect one Director.  If the number which may be so elected at any 
special meeting does not amount to the required number, the holders of the 
Preferred Stock shall have the right to make such increase in the number of 
Directors as shall be necessary to permit the election by them of their 
Director.  After the holders of the Preferred Stock shall have exercised 
their right to elect one Director in any default period and during the 
continuance of such period, the number of Directors shall not be increased or 
decreased except by vote of the holders of Preferred Stock as herein provided 
or pursuant to the rights of any equity securities ranking senior to or pari 
passu with the Series B Participating Preferred Stock.

(iii)     Unless the holders of Preferred Stock shall, during an existing 
default period, have previously exercised their right to elect one Director, 
the Board of Directors may order, or any shareholder or shareholders owning 
in the aggregate not less than ten percent (10%) of the total number of 
shares of  Preferred Stock outstanding, irrespective of series, may request, 
the calling of a special meeting of the holders of Preferred Stock, which 
meeting shall thereupon be called by the President, a Vice President or the 
Secretary of the Corporation.  Notice of such meeting and of any annual 
meeting at which holders of Preferred Stock are entitled to vote pursuant to 
this paragraph (c)(iii) shall be given to each holder of record of Preferred 
Stock by mailing a copy of such notice to him at his last address as the same 
appears on 

                                        A-4
[PAGE]

the books of the Corporation.  Such meeting shall be called for a time not 
earlier than ten (10) days and not later than sixty (60) days after such 
order or request or in default of the calling of such meeting within sixty 
 (60) days 
after such order or request, such meeting may be called on similar notice by 
any shareholder or shareholders owning in the aggregate not less than ten 
percent (10%) of the total number of shares of Preferred Stock outstanding.  
Notwithstanding the provisions of this paragraph (c)(iii), no such special 
meeting shall be called during the period within sixty (60) days immediately 
preceding the date fixed for the next annual meeting of the shareholders.

(iv)     In any default period, the holders of Common Stock, and other 
classes of stock of the Corporation, if applicable, shall continue to be 
entitled to elect the whole number of Directors until the holders of 
Preferred Stock shall have exercised their right to elect one Director voting 
as a class, after the exercise of which right (x) the Director so elected by 
the holders of Preferred Stock shall continue in office until his or her 
successor shall have been elected by such holders or until the expiration of 
the default period, and (y) any vacancy in the Board of Directors may (except 
as provided in paragraph (c)(ii) of this Section 3) be filled by vote of a 
majority of the remaining Directors (if any) theretofore elected by the 
holders of the class of stock which elected the Director whose office shall 
have become vacant.  References in this paragraph (c) to Directors elected by 
the holders of a particular class of stock shall include Directors elected by 
such Directors to fill vacancies as provided in clause (y) of the foregoing 
sentence.

(v)     Immediately upon the expiration of a default period, (x) the right of 
the holders of Preferred Stock as a class to elect one Director shall cease, 
(y) the term of the Director elected by the holders of Preferred Stock as a 
class shall terminate, and (z) the number of Directors shall be such number 
as may be provided for in, or pursuant to, the Articles of Incorporation or 
Bylaws irrespective of any increase made pursuant to the provisions of 
paragraph (c)(ii) of this Section 3 (such number being subject, however, to 
change thereafter in any manner provided by law or in the Articles of 
Incorporation or Bylaws).  Any vacancy or vacancies in the Board of Directors 
effected by the provisions of clauses (y) and (z) in the preceding sentence 
may be filled by a majority of the remaining Directors, even though less than 
a quorum.

     (d)     Except as set forth herein, holders of Series B Participating 
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.

                                        A-5
[PAGE]


     4.     Certain Restrictions.

     (a)     Whenever quarterly dividends or other dividends or distributions 
payable on the Series B Participating 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 B Participating 
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 B Participating 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 B  Participating 
Preferred Stock except dividends paid ratably on the Series B Participating 
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 B Participating 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 B Participating 
Preferred Stock; or

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

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

                                        A-6
[PAGE]


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

     6.     Liquidation, Dissolution or Winding Up.

     (a)     Upon any liquidation (voluntary or otherwise), dissolution or 
winding up of the Corporation, no distribution shall be made to the holders 
of shares of stock ranking junior (either as to dividends or upon 
liquidation, dissolution or winding up) to the Series B Participating 
Preferred Stock unless, prior thereto, the holders of shares of Series B 
Participating Preferred Stock shall have received per share, the greater of 
10,000 times $1.00 or 10,000 times the payment made per share of Common 
Stock, plus an amount equal to accrued and unpaid dividends and distributions 
thereon, whether or not declared, to the date of such payment (the "Series B 
Liquidation Preference").  Following the payment of the full amount of the 
Series B Liquidation Preference, no additional distributions shall be made to 
the holders of shares of Series B Participating Preferred Stock unless, prior 
thereto, the holders of shares of Common Stock shall have received an amount 
per share (the "Common Adjustment") equal to the quotient obtained by 
dividing (i) the Series B Liquidation Preference by (ii) 10,000 (as 
appropriately adjusted as set forth in subparagraph (c) below to reflect such 
events as stock splits, stock dividends and recapitalization with respect to 
the Common Stock) (such number in clause (ii), the "Adjustment Number").  
Following the payment of the full amount of the Series B Liquidation 
Preference and the Common Adjustment in respect of all outstanding shares of 
Series B Participating Preferred Stock and Common Stock, respectively, 
holders of Series B Participating Preferred Stock and holders of shares of 
Common Stock shall receive their ratable and proportionate share of the 
remaining assets to be distributed in the ratio of the Adjustment Number to 1 
with respect to such Preferred Stock and Common Stock, on a per share basis, 
respectively.

     (b)     In the event there are not sufficient assets available to permit 
payment in full of the Series B Liquidation Preference and the liquidation 
preferences of all other series of Preferred Stock, if any, which rank on a 
parity with the Series B Participating Preferred Stock then such remaining 
assets shall be distributed ratably to the holders of such parity shares in 
proportion to their respective liquidation preferences.  In the event there 
are not sufficient assets available to permit payment 

                                        A-7
[PAGE]
in full of the Common Adjustment, then such remaining assets shall be 
distributed ratably to the holders of Common Stock.

     (c)     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, by 
reclassification or otherwise, then in each such case the Adjustment Number 
in effect immediately prior to such event shall be adjusted by multiplying 
such Adjustment 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.

     7.     Consolidation, Merger, etc.  In case the Corporation shall enter 
into any consolidation, merger, combination or other transaction in which the 
shares of Common Stock are exchanged for or changed into other stock or 
securities, cash and/or any other property, then in any such case the shares 
of Series B Participating 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 10,000 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 (a) declare any dividend on Common 
Stock payable in shares of Common Stock, (b) subdivide the outstanding Common 
Stock, or (c) combine the outstanding Common Stock into a smaller number of 
shares, then in each such case the amount set forth in the preceding sentence 
with respect to the exchange or change of shares of Series B Participating 
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 are outstanding immediately prior to such event.

     8.     Redemption.  The shares of Series B Participating Preferred Stock 
shall not be redeemable.

     9.     Ranking.  The Series B Participating Preferred Stock shall rank 
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 
such series shall provide otherwise.

     10.     Amendment.  The Articles of Incorporation and the Bylaws of the 
Corporation shall not be further amended in any manner which would materially 
alter or change the powers, preferences or special rights of the Series B 
Participating Preferred Stock so as to affect them adversely without the 
affirmative vote of the 

                                        A-8
[PAGE]

holders of at least sixty-six and two-thirds percent (66-2/3%) of the 
outstanding shares of Series B Participating Preferred Stock voting 
separately as a class.

     11.     Fractional Shares.  Series B Participating 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 to have the benefit of 
all other rights of holders of Series B Participating Preferred Stock.

     IN WITNESS WHEREOF, we have executed and subscribed this Certificate and 
do affirm the foregoing as true under the  penalties of perjury this 7th day 
of November, 1996.



                                                ----------------------------
                                                         President



                                               Attest:




                                                ----------------------------
                                                         Secretary

                                        A-9
[PAGE]

                                       EXHIBIT B


                             [Form of Rights Certificate]





Certificate No. R-______________               _____________ Rights



     NOT EXERCISABLE AFTER NOVEMBER 21, 2006 OR EARLIER IF NOTICE OF 
REDEMPTION IS GIVEN.  THE RIGHTS ARE SUBJECT TO REDEMPTION, AT THE OPTION OF 
THE COMPANY, AT $.001 PER RIGHT ON THE TERMS SET FORTH IN THE RIGHTS 
AGREEMENT.  [THE RIGHTS REPRESENTED BY THIS RIGHTS CERTIFICATE WERE ISSUED TO 
A PERSON WHO WAS AN ACQUIRING PERSON OR AN AFFILIATE OR AN ASSOCIATE OF AN 
ACQUIRING PERSON, AS SUCH TERMS ARE DEFINED IN THE RIGHTS AGREEMENT.  THIS 
RIGHTS CERTIFICATE AND THE RIGHTS REPRESENTED HEREBY MAY BECOME VOID UNDER 
THE CIRCUMSTANCES SPECIFIED IN SECTION 7(E) OF THE RIGHTS AGREEMENT.]*

                                RIGHTS CERTIFICATE

                          AGOURON PHARMACEUTICALS, INC.


This certifies that ___________, or registered assigns, is the registered 
owner of the number of Rights set forth above, each of which entitles the 
owner thereof, subject to the terms, provisions and conditions of the Rights 
Agreement dated as of November 7, 1996 (the "Rights Agreement") between 
Agouron Pharmaceuticals, Inc., a California corporation (the "Company"), and 
Chase Mellon Shareholder Services, L.L.C. (the "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. (Pacific time) on 
November 21, 2006, at the office of the Rights Agent designated for such 
purpose, one one-ten thousandth of a fully paid, nonassessable share of 
Series B Participating Preferred Stock (the "Preferred Stock") of the 
Company, at a purchase price of $500.00 per one one-ten thousandth of a share 
(the "Purchase Price"), upon presentation and surrender of this Rights 
Certificate with the appropriate Form of Election to purchase and certificate 
duly executed.  The number of Rights evidenced by this Rights Certificate 
(and the number of shares which may be purchased upon exercise thereof) set 
forth above, and the Purchase Price set forth above, are the number and 
Purchase Price as of the close of business on November 21, 1996, based on the 
Preferred Stock as constituted at such date.

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 Rights Certificate are subject to 
modification and adjustment upon the happening of certain events.

                                        B-1
[PAGE]


     This Rights Certificate is subject to all of the terms, provisions and 
conditions of the Rights Agreement, which terms, provisions and conditions 
are hereby 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  hereunder 
of the Rights Agent, the Company and the holders of the Rights Certificates.  
Copies of the Rights Agreement are on file at the principal office of the 
Company and are also  available upon written request to the Company.

     This Rights Certificate, with or without other Rights Certificates, upon 
surrender at the office of the Rights Agent designated for such purpose, may 
be exchanged for another Rights Certificate or Rights Certificates of like 
tenor and date  evidencing Rights entitling the holder to purchase a like 
aggregate number of shares of Preferred Stock as the Rights evidenced by the 
Rights Certificate or Rights Certificates surrendered shall have entitled 
such holder to purchase.  If this Rights Certificate shall be exercised 
(other than pursuant to Section 11(a)(ii) of the Rights Agreement) in part, 
the holder shall be entitled to receive upon surrender hereof another Rights 
Certificate or Rights Certificates for the number of whole Rights not 
exercised.  If this Rights Certificate shall be exercised in whole or in part 
pursuant to Section 11(a)(ii) of the Rights Agreement, the holder shall be 
entitled to receive this Rights Certificate duly marked to indicate that such 
exercise has occurred as set forth in the Rights Agreement.

     Subject to the provisions of the Rights Agreement, the Rights evidenced 
by this Certificate may be redeemed by the Company at its option at a 
redemption price of $.001 per Right.  Subject to the provisions of the Rights 
Agreement, the Company, at its option, may elect to mail payment of the 
redemption price to the registered holder of the Right at the time of 
redemption, in which event this certificate may become void without any 
further action by the Company.

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

     No holder of this Rights Certificate, as such, shall be entitled to vote 
or receive dividends or be deemed for any purpose the holder of shares of 
Preferred 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 shareholder of the Company or any right to vote 
for the election of directors or upon any matter submitted to shareholders at 
any meeting  thereof, or to give or withhold

                                        B-2
[PAGE]

consent to any corporate action, or to receive notice of meetings or other 
actions affecting shareholders (except as provided in the Rights Agreement), 
or to receive dividends or subscription rights, or otherwise, until the Right 
or Rights evidenced by this Rights Certificate shall have been exercised as 
provided in the Rights 
Agreement.

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

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



     Dated: _______________________ .



Attest:                                     AGOURON PHARMACEUTICALS, INC.

       
                                            By ___________________________
 



Title ___________________________           Title ________________________


Countersigned:



CHASE MELLON SHAREHOLDER
SERVICES, L.L.C.




By ___________________________


                                        B-3
[PAGE]


                  [Form of Reverse Side of Rights Certificate]

                               FORM OF ASSIGNMENT

(To be executed by the registered holder if such

holder desires to transfer the Rights Certificate.)


     FOR VALUE RECEIVED, ___________________________ hereby sells, assigns and
transfers unto  ______________________________________________________
                        (please print name and address of transferee)
_________________________________________________________________________
this Rights Certificate, together with all right, title and interest therein, 
and does hereby irrevocably constitute and appoint _________________________ 
Attorney, to transfer the within Rights Certificate on the books of the 
within-named Company, with full power of substitution.


     Dated: ___________________________.


                                           ___________________________ 
                                                    Signature



Signature Guaranteed:



                                        B-4
[PAGE]

                                   CERTIFICATE





     The undersigned hereby certifies by checking the appropriate boxes that:



      (1)     the Rights evidenced by this Rights Certificate / / are
/ / are not being sold, assigned and transferred by or on behalf of a Person 
who is or was an Acquiring Person or an Affiliate or Associate of any such 
Acquiring Person (as such 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 Rights 
Certificate from any Person who is, was or subsequently became an Acquiring 
Person or an Affiliate or Associate of an Acquiring Person.



     Dated: _____________________.







                                             ___________________________
                                                       Signature


                                       NOTICE



     The signature to the foregoing Assignment must correspond to the name as 
written upon the face of this Rights Certificate in every particular, without 
alteration or enlargement or any change whatsoever.


                                        B-5
[PAGE]


                            FORM OF ELECTION TO PURCHASE

                       (To be executed if holder desires to
                   exercise the Rights Certificate pursuant to
                     Section 11(a)(ii) of the Rights Agreement.)

To  AGOURON PHARMACEUTICALS, INC.:





     The undersigned hereby irrevocably elects to exercise __________ Rights 
represented by this Rights Certificate to purchase the shares of Common Stock 
(or such other securities of the Company) issuable upon the exercise of the 
Rights and  requests that certificates for such shares be issued in the name 
of:
____________________________________________________________________________
          (Please insert social security or other identifying number)

 _____________________________________________________________________________
                       (Please print name and address)

_____________________________________________________________________________


     The Rights Certificate indicating the balance, if any, of such Rights 
which may still be exercised pursuant to Section 11(a)(ii) of the Rights 
Agreement shall be returned to the undersigned unless such Person requests 
that the Rights Certificate be registered in the name of and delivered to:

____________________________________________________________________________

Please insert social security or other identifying number  (complete only if 
Rights Certificate is to be registered in a name other than the undersigned)

_____________________________________________________________________________

_____________________________________________________________________________
                        (Please print name and address)



     Dated: _____________________.




                                            _______________________________
                                                       Signature



Signature Guaranteed:  


                                        B-6
[PAGE]

                                     CERTIFICATE





     The undersigned hereby certifies by checking the appropriate boxes that:



     (1)     the Rights evidenced by this Rights 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 
 (as such terms are defined pursuant to the Rights Agreement);

     (2)     this Rights Certificate / / is / / is not being sold, assigned 
and transferred by or on behalf of a Person who is or was an Acquiring Person 
or an Affiliate or Associate of any such Acquiring Person (as such terms are 
defined in the Rights Agreement);

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



     Dated: ______________________.



                                                 ____________________________
                                                           Signature


                                      NOTICE


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



                                        B-7
[PAGE]

                            FORM OF ELECTION TO PURCHASE

                 (To be executed if holder desires to exercise
                 the Rights Certificate other than pursuant to
                  Section 11(a)(ii) of the Rights Agreement.)



To  AGOURON PHARMACEUTICALS, INC.:


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

_____________________________________________________________________________
     (Please insert social security or other identifying number)

_____________________________________________________________________________
                        (Please print name and address)

_____________________________________________________________________________

     The Rights Certificate indicating the balance, if any, of such Rights 
which may still be exercised pursuant to Section 11(a)(ii) of the Rights 
Agreement shall be returned to the undersigned unless such Person requests 
that the Rights Certificate be registered in the name of and delivered to:

_____________________________________________________________________________
Please insert social security or other identifying number (complete only if 
Rights Certificate is to be registered in a name other than the undersigned)

_____________________________________________________________________________
                          (Please print name and address)

_____________________________________________________________________________



     Dated: __________________.



                                              ______________________________ 
                                                         Signature



Signature Guaranteed:  



                                        B-8
[PAGE]

                                   CERTIFICATE


     The undersigned hereby certifies by checking the appropriate boxes that:

     (1)     the Rights evidenced by this Rights Certificate / / are 
/ / are not being sold, assigned and transferred by or on behalf of a Person 
who is or was an Acquiring Person or an Affiliate or Associate of any such 
Acquiring Person (as such 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 Rights 
Certificate from any Person who is, was or subsquently became an Acquiring 
Person or an Affiliate or Associate of an Acquiring Person.

     Dated: __________________.



                                            _________________________________
                                                        Signature



                                     NOTICE


     The signature to the foregoing Election to Purchase must correspond to 
the name as written upon the fact of this Rights Certificate in every 
particular, without alteration or enlargement or any change whatsoever.


                                        B-9
[PAGE]


                                    EXHIBIT C

                               SUMMARY OF RIGHTS


     On November 7, 1996 the Board of Directors of Agouron Pharmaceuticals, 
Inc. (the "Company") declared a dividend distribution of one Right for each 
outstanding share of common stock, no par value (the "Common Stock"), of the 
Company to shareholders of record at the close of business on November 21, 
1996 (the "Record Date").  Except as set forth below, each Right, when 
exercisable, entitles the registered holder to purchase from the Company one 
one-ten thousandth share of a new series of preferred stock, designated as 
Series B Participating Preferred Stock, no par value (the "Preferred Stock"), 
at a price of $500.00 per share (the "Purchase Price"), subject to 
adjustment.  The description and terms of the Rights are set forth in a 
Rights Agreement (the "Rights Agreement") between the Company and Chase 
Mellon Shareholder Services, L.L.C., as Rights Agent.

     Initially, the Rights will be attached to all Common Stock certificates 
representing shares then outstanding, and no separate Rights certificates 
will be distributed.  The Rights will separate from the Common Stock and a 
Distribution Date will occur upon the earliest of (a) a public announcement 
that a Person or group of affiliated or associated Persons (an "Acquiring 
Person") has acquired, or obtained the right to acquire beneficial ownership 
of securities having fifteen percent (15%) or more of the voting power of all 
outstanding voting securities of the Company or (b) ten (10) days (unless 
such date is extended by the Board of Directors) following the commencement 
of (or a public announcement of an intention to make) a tender offer or 
exchange offer which would result in any Person or group and related Persons 
becoming an Acquiring Person.

     Until the Distribution Date the Rights will be evidenced, with respect 
to any of the Common Stock certificates outstanding as of the Record Date, by 
such Common Stock certificate together with this Summary of Rights.  The 
Rights Agreement provides that, until the Distribution Date, the Rights will 
be transferred with and only with Common Stock certificates.  From as soon as 
practicable after the Record Date and until the Distribution Date (or earlier 
redemption or expiration of the Rights), new Common Stock certificates issued 
after the Record Date upon transfer or new issuance of the Common Stock will 
contain a notation incorporating the Rights Agreement by reference.  Until 
the Distribution Date (or earlier redemption or expiration of the Rights), 
the surrender for transfer of any certificates for Common Stock outstanding 
as of the Record Date (with or without this Summary of Rights attached) 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 ("Rights 
Certificates") will be mailed to holders of record of the Common 

                                        C-1
[PAGE]

Stock as of the close of business on the Distribution Date, and the separate 
Rights Certificates alone will evidence the Rights.

     The Rights are not exercisable until the Distribution Date.  The Rights 
will expire on the earliest of (a) November 21, 2006, (b) consummation of a 
merger transaction with a Person or group who acquired Common Stock pursuant 
to a Permitted Offer (as defined below), and is offering in the merger the 
same price per share and form of consideration paid in the Permitted Offer, 
or (c) redemption or exchange of the Rights 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, certain 
convertible securities or securities having the same or more favorable 
rights, privileges and preferences as the Preferred Stock 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 
regular quarterly cash dividends out of earnings or retained 
earnings) or of subscription rights or warrants (other than those referred to 
above).

     In the event that, after the first date of public announcement by the 
Company or an Acquiring Person that an Acquiring Person has become such, the 
Company is involved in a merger or other business combination transaction 
(whether or not the Company is the surviving corporation) or fifty percent 
(50%) or more of the Company's assets or earning power are sold (in one 
transaction or a series of transactions), proper provision shall be made so 
that each holder of a Right (other than an Acquiring Person) shall thereafter 
have the right to receive, upon the exercise thereof at the then current 
exercise price of the Right, that number of shares of common stock of either 
the Company, in the event that it is the surviving corporation of a merger or 
consolidation, or the acquiring company (or, in the event there is more than 
one acquiring company, the acquiring company receiving the greatest portion 
of the assets or earning power transferred) which at the time of such 
transaction would have a market value of two times the exercise price of the 
Right (such right being called the "Merger Right").  In the event that a 
Person becomes the beneficial owner of securities having fifteen percent 
 (15%) or more of the voting power of all then outstanding voting securities 
of the Company (unless pursuant to a tender offer or exchange offer for all 
outstanding shares of Common Stock at a price and on terms determined prior 
to the date of the first acceptance of payment for any of such shares by at 
least a majority of the members of the Board of Directors who are not 
officers of the Company and are not Acquiring Persons or Affiliates or 
Associates 

                                        C-2
[PAGE]

thereof to be both adequate and otherwise in the best interests of the 
Company and its shareholders (a "Permitted Offer")), then proper provision 
shall be made so that each holder of a Right will for a sixty (60) day period 
 (subject to extension under certain circumstances) thereafter have the right 
to receive upon exercise that number of shares of Common Stock having a 
market value of two times the exercise price of the Right, to the extent 
available, and then (after all authorized and unreserved shares of Common 
Stock have been issued) a common stock equivalent (such as Preferred Stock or 
another equity security with at least the same economic value as the Common 
Stock) having a market value of two times the exercise price of the Right, 
with Common Stock to the extent available being issued first (such right 
being called the "Subscription Right").  The holder of a Right will continue 
to have the Merger Right whether or not such holder exercises the 
Subscription Right.  Notwithstanding the foregoing, upon the occurrence of 
any of the events giving rise to the exercisability of the Merger Right or 
the Subscription Right, any Rights that are or were at any time after the 
Distribution Date owned by an Acquiring Person shall immediately become null 
and void.

     With certain exceptions, no adjustments in the Purchase Price will be 
required until cumulative adjustments require an adjustment of at least one 
percent (1%) in such Purchase Price.  No fractions of shares will be issued 
and, in lieu thereof, an adjustment in cash will be made based on the market 
price of the Common Stock on the last trading date prior to the date of 
exercise.

     At any time prior to the earlier to occur of (i) a Person becoming an 
Acquiring Person or (ii) the expiration of the Rights, the Company may redeem 
the Rights in whole, but not in part, at a price of $.001 per Right (the 
"Redemption Price"), which redemption shall be effective upon the action of 
the Board of Directors.  Additionally, the Company may thereafter redeem the 
then outstanding Rights in whole, but not in part, at the Redemption Price 
(A) if such redemption is incidental to a merger or other business 
combination transaction or series of transactions involving the Company but 
not involving an Acquiring Person or certain related Persons or (B) following 
an event giving rise to, and the expiration of the exercise period for, the 
Subscription Right if and for as long as an Acquiring Person beneficially 
owns securities representing less than fifteen percent (15%) of the voting 
power of the Company's voting securities.  The redemption of Rights described 
in the preceding sentence shall be effective only as of such time when the 
Subscription Right is not exercisable, and in any event, only after ten (10) 
Business Days prior notice.  Upon the effective date of the 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.

     Subject to applicable law, the Board of Directors, at its option, may at 
any time after a Person becomes an Acquiring Person 

                                        C-3
[PAGE]

(but not after the acquisition by such Person of fifty percent (50%) or more 
of the outstanding Common Stock), exchange all or part of the then 
outstanding and exercisable rights (except for Rights which have become void) 
for shares of Common Stock equivalent to one share of Common Stock per Right 
or, alternatively, for substitute consideration consisting of cash, 
securities of the Company or other assets (or any combination thereof).

     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 quarterly dividend in an amount 
equal to 10,000 times the dividend declared on each share of Common Stock, 
but in no event less than $100.  In the event of liquidation, the holders of 
Preferred Stock will receive a preferred liquidation payment equal to the 
greater of 10,000 times $1.00 or 10,000 times the payment made per each share 
of Common Stock.  Each share of Preferred Stock will have 10,000 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, each share of Preferred Stock will be entitled to receive 10,000 
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 antidilution 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-ten thousandth 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.

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

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

                                        C-4





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