PENNACO ENERGY INC
8-A12B, 1999-04-16
CRUDE PETROLEUM & NATURAL GAS
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<PAGE>

                          SECURITIES AND EXCHANGE COMMISSION
                               WASHINGTON, D.C.   20549

                                       FORM 8-A

                 FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES

                     PURSUANT TO SECTION 12(b) OR 12(g) OF THE

                          SECURITIES EXCHANGE ACT OF 1934
                                           

                               PENNACO ENERGY, INC. 
- -------------------------------------------------------------------------------
                (Exact name of registrant as specified in its charter)
                                           
     
                NEVADA                                  88-0384598 
- ----------------------------------------   ------------------------------------
(State of incorporation or organization)   (I.R.S. Employer Identification No.)

     
            1050 17TH STREET
               SUITE 700
            DENVER, COLORADO                              80265
- --------------------------------------------------------------------------------
(Address of principal executive office)                 (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
- ----------------------------------------     ----------------------------------
    Common Stock, par value $.001                  American Stock Exchange
   Rights to Purchase Common Stock                 American Stock Exchange 

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

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

     Securities Act registration statement file number to which this form
relates: __________ (if applicable)

SECURITIES TO BE REGISTERED PURSUANT TO SECTION 12(g) OF THE ACT:

                                          None  
- --------------------------------------------------------------------------------
                                    (Title of Class) 
<PAGE>

ITEM 1.  DESCRIPTION OF REGISTRANT'S SECURITIES TO BE REGISTERED.

SUMMARY OF THE COMMON STOCK

   A description of the common stock, par value $0.001 per share, of 
Pennaco Energy, Inc. (the "Company") to be registered hereunder is set forth 
under Item 8 -- "Description of Securities" in the prospectus included in the 
Registrant's Registration Statement on Form 10-SB, as amended (File No. 
000-24881), initially filed with the Securities and Exchange Commission on 
September 8, 1998, under the Securities Exchange Act of 1934, as amended, 
which description is incorporated herein by reference. 

SUMMARY OF RIGHTS TO PURCHASE COMMON STOCK

   On February 24, 1999, the Board of Directors of the Company declared a 
dividend distribution of one common stock purchase right (a "Right") for each 
outstanding share of Common Stock of the Company.  The distribution is 
payable to the stockholders of record at the close of business on March 9, 
1999 (the "Record Date").  Each Right entitles the registered holder thereof 
to purchase from the Company one-half of a share of Common Stock, at a price 
of $20, subject to adjustment.  The following is a summary of the Rights; the 
full description and terms of the Rights are set forth in a Rights Agreement 
(the "Rights Agreement") between the Company and Harris Trust and Savings 
Bank, as Rights Agent (the "Rights Agent"). Copies of the Rights Agreement 
are 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 all the provisions of the Rights Agreement, including the 
definitions therein of certain terms, which Rights Agreement is incorporated 
herein by reference.

   THE RIGHTS AGREEMENT

   Initially, the Rights will attach to all certificates representing shares 
of outstanding Company Common Stock, and no separate Rights Certificates will 
be distributed. The Rights will separate from the Company Common Stock and 
the Distribution Date will occur upon the earlier of (i) 10 days following 
the date of public announcement that a person or group of persons has become 
an Acquiring Person (as hereinafter defined) or (ii) 10 business days (or 
such later date as may be determined by action of the Board of Directors 
prior to the time a person becomes an Acquiring Person) following the 
commencement of, or the announcement of an intention to make, a tender offer 
or exchange offer upon consummation of which the offeror would, if 
successful, become an Acquiring Person (the earlier of such dates being 
called the "Distribution Date").

   The term "Acquiring Person" means any person who or which, together with 
all of its affiliates and associates, shall be the beneficial owner of 15% or 
more of the outstanding Common Stock, but shall not include (i) the Company 
or any Subsidiary of the Company or any employee benefit plan of the Company 
or (ii) R.I.S. Resources International Corp. and its subsidiaries 
(collectively, "RIS") or any other person or entity in which RIS is at the 
time of determination the direct record and beneficial of all outstanding 
voting securities (collectively, "Exempt Persons").

                                      -2-
<PAGE>

   The Rights Agreement provides that, until the Distribution Date, the 
Rights will be transferred with and only with the Common Stock.  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 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, even without such 
notation or a copy of this Summary of Rights being attached thereto, will 
also constitute the transfer of the Rights associated with the Common Stock 
represented by such certificate.  As soon as practicable following the 
Distribution Date, separate certificates evidencing the Rights ("Rights 
Certificates") will be mailed to holders of record of the Common Stock as of 
the close of business on the Distribution Date and such separate Rights 
Certificates alone will evidence the Rights.

   The Rights are not exercisable until the Distribution Date.  The Rights 
will expire on March 9, 2009 (the "Expiration Date").

   The Purchase Price payable, and the number of one-half of a share of 
Common 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 Common Stock, (ii) upon the grant to holders of the 
Common Stock of certain rights or warrants to subscribe for or purchase 
shares of Common Stock at a price, or securities convertible into Common 
Stock with a conversion price, less than the then current market price of the 
Common Stock or (iii) upon the distribution to holders of the Common Stock of 
evidences of indebtedness or assets (excluding regular periodic cash 
dividends paid or dividends payable in Common Stock) or of subscription 
rights or warrants (other than those referred to in (ii) above).

   The number of outstanding Rights and the number of one-half of a share of 
Common Stock issuable upon exercise of each Right are also subject to 
adjustment in the event of a stock split of the Common Stock or a stock 
dividend on the Common Stock payable in the Common Stock or subdivisions, 
consolidations or combinations of the Common Stock occurring, in any such 
case, prior to the Distribution Date.

   In the event that following a Stock Acquisition Date (the date of public 
announcement that an Acquiring Person has become such) the Company is 
acquired in a merger or other business combination transaction or more than 
50% of its consolidated assets or earning power are sold, proper provision 
will be made so that each holder of a Right will 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 the acquiring company which 
at the time of such transaction will have a market value of two times the 
exercise price of the Right (the "Flip-Over Right").

   In the event that a person (other than an Exempt Person) becomes an 
Acquiring Person, proper provision shall be made so that each holder of a 
Right (other than the Acquiring Person and its affiliates and associates) 
will thereafter have the right to receive upon exercise that number of shares 
of Common Stock (or, under certain circumstances, cash, other equity 
securities or property of the 

                                      -3-
<PAGE>

Company) having a market value equal to two times the Purchase Price of the
Rights (the "Flip-In Right").  Upon the occurrence of the foregoing event giving
rise to the exercisability of the Rights, any Rights that are or were at any
time owned by an Acquiring Person shall become void.

   With certain exceptions, no adjustment in the Purchase Price will be 
required until cumulative adjustments require an adjustment of at least 1% in 
such Purchase Price.  Upon exercise of the Rights, no fractional shares of 
Common Stock will be issued and cash will be paid in lieu of fractional 
shares of Common Stock.

   At any time prior to the earlier to occur of (i) 5:00 p.m., Houston, Texas 
time, on the 10th day after the Stock Acquisition Date or (ii) the expiration 
of the Rights, the Company may redeem the Rights in whole, but not in part, 
at a price of $0.01 per Right (the "Redemption Price"); PROVIDED, that (i) if 
the Board of Directors authorizes redemption on or after the time a person 
becomes an Acquiring Person, then such authorization must be by Board 
Approval (as hereinafter defined) and (ii) the period for redemption may, 
upon Board Approval, be extended by amending the Rights Agreement.  The term 
"Board Approval" means the approval of a majority of the directors of the 
Company. Immediately upon any redemption of the Rights described in this 
paragraph, the right to exercise the Rights will terminate and the only right 
of the holders of Rights will be to receive the Redemption Price.

   The terms of the Rights may be amended by the Board of Directors without 
the consent of the holders of the Rights at any time and from time to time 
provided that such amendment does not adversely affect the interests of the 
holders of the Rights.  In addition, during any time that the Rights are 
subject to redemption, the terms of the Rights may be amended by Board 
Approval, including an amendment that adversely affects the interests of the 
holders of the Rights, without the consent of the holders of Rights.

   Until a Right is exercised, the holder thereof, as such, will have no 
rights as a stockholder of the Company, including, without limitation, the 
right to vote or to receive dividends.  While the distribution of the Rights 
will not be taxable to stockholders or to the Company, stockholders may, 
depending upon the circumstances, recognize taxable income in the event that 
the Rights become exercisable for Common Stock (or other consideration).

ITEM 2.  EXHIBITS.

     The following exhibits to this Registration Statement on Form 8-A are
either filed herewith or are incorporated by reference from the documents
specified, which have been filed with the Securities and Exchange Commission.

<TABLE>
<S>       <C>
     1.   The Company's Registration Statement on Form 10-SB (File No.
          000-24881), as amended, filed with the Securities and Exchange
          Commission on September 8, 1998 (the "Registration Statement")
          (incorporated herein by reference).

                                       -4-
<PAGE>

     2.   Articles of Incorporation of the Company (incorporated herein by
          reference to Exhibit 3.1 to the Registration Statement).

     3.   Bylaws of the Company (incorporated herein by reference to Exhibit 3.2
          to the Registration Statement).

    *4.   Rights Agreement, dated February 24, 1999, between the
          Company and Harris Trust and Savings Bank, as Rights Agent.

    *5.   Specimen Certificate representing Common Stock of the Registrant.
</TABLE>
- -------------------
* FILED HEREWITH
 

                                          -5-
<PAGE>

                                      SIGNATURE

     Pursuant to the requirements of Section 12 of the Securities Exchange Act
of 1934, the Registrant has duly caused this registration statement to be signed
on its behalf by the undersigned, thereunto duly authorized.

Dated: April 16, 1999

                                          PENNACO ENERGY, INC.


                                          /s/ Glen C. Warren, Jr.
                                          --------------------------------------
                                          Glen C. Warren, Jr.
                                          CHIEF FINANCIAL OFFICER AND EXECUTIVE 
                                          VICE PRESIDENT






                                        -6-
<PAGE>

                                    EXHIBIT INDEX

<TABLE>
<S>       <C>
     1.   The Company's Registration Statement on Form 10-SB (File No.
          000-24881), as amended, filed with the Securities and Exchange
          Commission on September 8, 1998 (the "Registration Statement")
          (incorporated herein by reference).

     2.   Articles of Incorporation of the Company (incorporated herein by
          reference to Exhibit 3.1 to the Registration Statement).

     3.   Bylaws of the Company (incorporated herein by reference to 
          Exhibit 3.2 to the Registration Statement).

    *4.   Rights Agreement, dated February 24, 1999, between the
          Company and Harris Trust and Savings Bank, as Rights Agent.

    *5.   Specimen Certificate representing Common Stock of the Registrant.
</TABLE>
- -------------------
* FILED HEREWITH
 
                                      -7-

<PAGE>

                                 PENNACO ENERGY, INC.

                                         AND

                    HARRIS TRUST AND SAVINGS BANK, AS RIGHTS AGENT


                                   RIGHTS AGREEMENT


                            DATED AS OF FEBRUARY 24, 1999

<PAGE>

                                  TABLE OF CONTENTS
<TABLE>
<S>                                                                               <C>
Section 1.   Certain Definitions . . . . . . . . . . . . . . . . . . . . . . . . .  1
Section 2.   Appointment of Rights Agent . . . . . . . . . . . . . . . . . . . . .  8
Section 3.   Issue of Right Certificates . . . . . . . . . . . . . . . . . . . . .  8
Section 4.   Form of Right Certificates. . . . . . . . . . . . . . . . . . . . . . 10
Section 5.   Countersignature and Registration . . . . . . . . . . . . . . . . . . 11
Section 6.   Transfer, Split Up, Combination and Exchange of Right Certificates;
               Mutilated, Destroyed, Lost or Stolen Right Certificates . . . . . . 12
Section 7.   Exercise of Rights; Purchase Price; Expiration Date of Rights . . . . 13
Section 8.   Cancellation and Destruction of Right Certificates. . . . . . . . . . 15
Section 9.   Availability of Common Stock. . . . . . . . . . . . . . . . . . . . . 15
Section 10.  Common Stock Record Date. . . . . . . . . . . . . . . . . . . . . . . 17
Section 11.  Adjustment of Purchase Price, Number of Shares or Number 
               of Rights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Section 12.  Certificate of Adjusted Purchase Price or Number of Shares. . . . . . 31
Section 13.  Consolidation, Merger or Sale or Transfer of Assets or Earning
               Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Section 14.  Fractional Rights and Fractional Shares . . . . . . . . . . . . . . . 38
Section 15.  Rights of Action. . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Section 16.  Agreement of Right Holders. . . . . . . . . . . . . . . . . . . . . . 40
Section 17.  Right Certificate Holder Not Deemed a Stockholder . . . . . . . . . . 41
Section 18.  Concerning the Rights Agent . . . . . . . . . . . . . . . . . . . . . 41
Section 19.  Merger or Consolidation or Change of Name of Rights Agent . . . . . . 42

                                       -i-

<PAGE>

Section 20.  Duties of Rights Agent. . . . . . . . . . . . . . . . . . . . . . . . 43
Section 21.  Change of Rights Agent. . . . . . . . . . . . . . . . . . . . . . . . 47
Section 22.  Issuance of New Right Certificates. . . . . . . . . . . . . . . . . . 49
Section 23.  Redemption. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Section 24.  Exchange. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Section 25.  Notice of Certain Events. . . . . . . . . . . . . . . . . . . . . . . 53
Section 26.  Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Section 27.  Supplements and Amendments. . . . . . . . . . . . . . . . . . . . . . 55
Section 28.  Successors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Section 29.  Benefits of this Agreement. . . . . . . . . . . . . . . . . . . . . . 56
Section 30.  Determination and Actions by the Board of Directors . . . . . . . . . 56
Section 31.  Severability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Section 32.  Governing Law . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Section 33.  Counterparts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Section 34.  Descriptive Headings. . . . . . . . . . . . . . . . . . . . . . . . . 57
</TABLE>

                                       -ii-

<PAGE>

                                   RIGHTS AGREEMENT

     This Agreement, dated as of February 24, 1999 ("Agreement"), between 
Pennaco Energy, Inc., a Nevada corporation (the "Company"), and Harris Trust 
and Savings Bank, an Illinois banking corporation, as rights agent (the 
"Rights Agent").

                                   R E C I T A L S:

     WHEREAS, at a meeting of the Board of Directors of the Company duly 
called and held on February 24, 1999, at which a quorum was present and 
acting throughout, such Board of Directors has authorized and declared a 
dividend of one common stock purchase right (a "Right") for each share of 
Common Stock (as such term is hereinafter defined) of the Company outstanding 
at the close of business on March 9, 1999 (the "Record Date"), each Right 
representing the right to purchase one-half of a share of Common Stock, upon 
the terms and subject to the conditions herein set forth, and has further 
authorized and directed the issuance of one Right with respect to each share 
of Common Stock that shall become outstanding between the Record Date and the 
earliest of the Distribution Date, the Redemption Date and the Final 
Expiration Date (as such terms are hereinafter defined);

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

     Section 1.  CERTAIN DEFINITIONS.  For purposes of this Agreement, the 
following terms have the meanings indicated:

          (a)  "Acquiring Person" shall mean any Person (as such term is
     hereinafter defined) who or which shall be the Beneficial Owner (as such
     term is hereinafter defined) of 15% or more of the shares of Common Stock
     then outstanding, but shall not include an 

<PAGE>

     Exempt Person; PROVIDED, HOWEVER, that if the Board of Directors 
     of the Company determines in good faith that a Person who would 
     otherwise be an "Acquiring Person" has become such inadvertently 
     (including, without limitation, because (i) such Person was unaware 
     that it beneficially owned a percentage of Common Stock that would 
     otherwise cause such Person to be an "Acquiring Person" or (ii) such 
     Person was aware of the extent of its Beneficial Ownership of Common 
     Stock but was unaware of the consequences of such Beneficial Ownership 
     under this Agreement) and without any intention of changing or 
     influencing control of the Company, and such Person, as promptly as 
     practicable after being advised of such determination divested or 
     divests himself or itself of Beneficial Ownership of a sufficient 
     number of shares of Common Stock so that such Person would no longer be 
     an Acquiring Person, then such Person shall not be deemed to be or to 
     have become an "Acquiring Person" for any purposes of this Agreement.  
     Notwithstanding the foregoing, no Person shall become an "Acquiring 
     Person" as the result of an acquisition of Common Stock by the Company 
     which, by reducing the number of shares outstanding, increases the 
     proportionate number of shares beneficially owned by such Person to 15% 
     or more of the Common Stock of the Company then outstanding; PROVIDED, 
     HOWEVER, that if a Person shall become the Beneficial Owner of 15% or 
     more of the Common Stock of the Company then outstanding by reason of 
     the share purchases by the Company and shall, after such share 
     purchases by the Company, become the Beneficial Owner of any additional 
     Common Stock of the Company, then such Person shall be deemed to be an 
     "Acquiring Person" unless upon the consummation of the acquisition of 
     such additional shares of Common Stock such Person does not own 15% or 
     more of the shares of Common Stock then outstanding.

                                       -2-

<PAGE>

          (b)  "Affiliate" shall have the meaning ascribed to such term in Rule
     12b-2 of the General Rules and Regulations under the Exchange Act as in
     effect on the date of this Agreement.

          (c)  "Associate" shall have the meaning ascribed to such term in Rule
     l2b-2 of the General Rules and Regulations under the Exchange Act as in
     effect on the date of this Agreement.

          (d)  A Person shall be deemed the "Beneficial Owner" of and, shall be
     deemed to have "Beneficial Ownership" 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 to acquire (whether such right is
          exercisable immediately or only after the passage of time) pursuant to
          any agreement, arrangement or understanding (other than customary
          agreements with and between underwriters and selling group members
          with respect to a bona fide public offering of securities), or upon
          the exercise of conversion rights, exchange rights, rights (other than
          these Rights), warrants or options, or otherwise; PROVIDED, HOWEVER,
          that a Person shall not be deemed the Beneficial Owner of, or to
          beneficially own, (I) securities tendered pursuant to a tender or
          exchange offer made by or on behalf of such Person or any of such
          Person's Affiliates or Associates until such tendered securities are
          accepted for purchase or exchange or (II) securities which such Person
          has a right to acquire upon the exercise of Rights at any time prior
          to the time a Person becomes an 

                                       -3-

<PAGE>

          Acquiring Person; or (B) the right to vote pursuant to any agreement,
          arrangement or understanding; PROVIDED, HOWEVER, that a Person shall 
          not be deemed the Beneficial Owner of, or to beneficially own, any 
          security by reason of such an agreement, arrangement or understanding 
          if the agreement, arrangement or understanding to vote such security 
          (a) arises solely from a revocable proxy or consent given to such 
          Person in response to a public proxy or consent solicitation made 
          pursuant to, and in accordance with, the applicable rules and 
          regulations promulgated under the Exchange Act (as such term is 
          hereinafter defined) and (b) is not also then reportable on Schedule 
          13D under the Exchange Act (or any comparable or successor report); or

               (iii)  which are beneficially owned, directly or indirectly, by
          any other Person with which such Person or any of such Person's
          Affiliates or Associates has any agreement, arrangement or
          understanding (other than customary agreements with and between
          underwriters and selling group members with respect to a bona fide
          public offering of securities) for the purpose of acquiring, holding,
          voting (except to the extent contemplated by the proviso to Section
          1(d)(ii)(B)) or disposing of any securities of the Company.

          Notwithstanding anything in this definition of Beneficial Ownership to
     the contrary, the phrase "then outstanding," when used with reference to a
     Person's Beneficial Ownership of securities of the Company, shall mean the
     number of such securities then issued and outstanding together with the
     number of such securities not then issued and outstanding which such Person
     would be deemed to own beneficially hereunder.

                                       -4-

<PAGE>

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

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

          (g)  "Common Stock" when used with reference to the Company shall mean
     the shares of common stock, par value $0.001 per share, of the Company. 
     "Common Stock" when used with reference to any Person other then the
     Company shall mean the capital stock (or, in the case of an unincorporated
     entity, the equivalent equity interest) with the greatest voting power of
     such other Person or, if such other Person is a Subsidiary of another
     Person, the Person or Persons which ultimately control such first-mentioned
     Person.

          (h)  "Common Stock equivalent" shall have the meaning set forth in
     Section 11(a)(iii) hereof.

          (i)  "Company" shall have the meaning set forth in the preamble
     hereof.

          (j)  "Continuing Director" means (i) any member of the Board of
     Directors of the Company, while such Person is a member of the Board, who
     is not an Acquiring Person, an Affiliate or Associate of an Acquiring
     Person, or a representative or nominee of an Acquiring Person or of any
     such Affiliate or Associate, and was a member of the Board prior to the
     date of this Agreement, or (ii) any Person (A) who subsequently becomes a
     member of the Board, (B) who is not an Acquiring Person, an Affiliate or
     Associate of an Acquiring Person, or a representative or nominee of an
     Acquiring Person or of any such Affiliate or Associate, and 

                                       -5-

<PAGE>

     6(C) whose nomination for election to the Board is recommended or approved 
     by a majority of the Continuing Directors or a nominating committee of the 
     Board consisting solely of Continuing Directors.

          (k)  "current per share market price" shall have the meaning set forth
     in Section 11(d) hereof.

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

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

          (n)  "Exchange Act" shall mean the Securities Exchange Act of 1934, as
     amended.

          (o)  "Exchange Ratio" shall have the meaning set forth in Section
     24(a) hereof.

          (p)  "Exempt Person" shall mean (i) the Company or any Subsidiary (as
     such term is hereinafter defined) of the Company or any employee benefit
     plan of the Company, (ii) R.I.S. Resources or any of its Subsidiaries
     (collectively, "RIS") or (iii) any Person other than RIS which is the
     Beneficial Owner of Common Stock Beneficially Owned by RIS (a "Second Tier
     RIS Stockholder"), but only if the shares of Common Stock otherwise
     Beneficially Owned by RIS or such Second Tier RIS Stockholder (the "RIS
     Shares") do not exceed the sum of (A) such RIS Shares held on the date
     hereof and (B) 1% of the shares of Common Stock of the Company then
     outstanding; provided, however, that in the event that RIS shall at any
     time cease to beneficially own 15% or more of the Common Stock of the
     Company then outstanding, then RIS and all Second Tier RIS Stockholders
     shall, upon the occurrence of such event and thereafter, cease to be Exempt
     Persons. 

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

                                       -6-
<PAGE>

          (r)  "Invalidation Time" shall have the meaning set forth in Section
     11(a)(ii) hereof.

          (s)  "Nasdaq" shall mean the National Association of Securities
     Dealers, Inc.  Automated Quotations System.

          (t)  "Person" shall mean any individual, firm, corporation, limited
     liability company, partnership, limited partnership or other entity, and
     shall include any successor (by merger or otherwise) of such entity.

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

          (v)  "Purchase Price" shall have the meaning set forth in Section 7(b)
     hereof.

          (w)  "Record Date" shall have the meaning set forth in the second
     paragraph hereof.

          (x)  "Redemption Date" shall have the meaning set forth in Section
     7(a) hereof.

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

          (z)  "Requisite Majority" means, at any time, the affirmative vote of
     a majority of the Continuing Directors then in office.

          (aa) "Rights Agent" shall have the meaning set forth in the preamble
     hereof.

          (ab) "Right" shall have the meaning set forth in the second paragraph
     hereof.

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

          (ad) "Section 11(a)(ii) Event" shall have the meaning set forth in
     Section 11(a)(ii) hereof.

          (ae) "Section 11(a)(iii) Trigger Date" shall have the meaning set
     forth in Section 11(a)(iii) hereof.

                                       -7-

<PAGE>

          (af) "Security" shall have the meaning set forth in Section 11(d)
     hereof.

          (ag) "Spread" shall have the meaning set forth in Section 11(a)(iii)
     hereof.

          (ah) "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.

          (ai) "Subsidiary" of any Person shall mean any corporation or other
     entity of which a majority of the voting power of the voting equity
     securities or equity interest is owned, directly or indirectly, by such
     Person.

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

          (ak) "Summary of Rights" shall have the meaning set forth in Section
     3(b) hereof.

          (al) "Trading Day" shall have the meaning set forth in Section 11(d)
     hereof.

     Section 2.  APPOINTMENT OF RIGHTS AGENT.  The Company hereby appoints 
the Rights Agent to act as agent for the Company and the holders of the 
Rights (who, in accordance with Section 3 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.

     Section 3.  ISSUE OF RIGHT CERTIFICATES.  (a) Until the earlier of (i) the
tenth day after the Stock Acquisition Date or (ii) the tenth business day (or
such later date as may be determined by action of the Board of Directors of the
Company prior to such time as any Person becomes an Acquiring Person) after the
date of the commencement by any Person of, or of the first public announcement
of the intention of any Person to commence, a tender or exchange offer the
consummation of which 

                                       -8-

<PAGE>

would result in any Person becoming an Acquiring Person (including any such 
date which is 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 will be evidenced (subject to the 
provisions of Section 3(b) hereof) by the certificates for Common Stock 
registered in the names of the holders thereof (which certificates shall also 
be deemed to be Right Certificates) and not by separate Right Certificates, 
and (y) the Rights will be transferable only in connection with the transfer 
of Common Stock.  As soon as practicable after the Distribution Date, the 
Company will prepare and execute, the Rights Agent will countersign, and the 
Company will send or cause to be sent (and the Rights Agent will, if 
requested, at the expense of the Company, send) by first-class, insured, 
postage prepaid mail, to each record holder of 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 Right Certificate, in substantially the form of 
Exhibit A hereto (a "Right Certificate"), evidencing one Right for each share 
of Common Stock so held.  As of the Distribution Date, the Rights will be 
evidenced solely by such Right Certificates. 

     (b)  On the  Record Date, or as soon as practicable thereafter, the 
Company will send a copy of a Summary of Rights to Purchase Common Stock, in 
substantially the form of Exhibit B hereto (the "Summary of Rights"), by 
first-class, postage-prepaid mail, to each record holder of Common Stock as 
of the Close of Business on the Record Date, at the address of such holder 
shown on the records of the Company.  With respect to certificates for Common 
Stock outstanding as of the Record Date, until the Distribution Date, the 
Rights will be evidenced by such certificates registered in the names of the 
holders thereof together with a copy of the Summary of Rights attached 
thereto.  Until the Distribution Date (or the earlier of the Redemption Date 
or the Final 

                                       -9-

<PAGE>

Expiration Date), the surrender for transfer of any certificate for Common 
Stock outstanding on the Record Date, with or without a copy of the Summary 
of Rights attached thereto, shall also constitute the transfer of the Rights 
associated with the Common Stock represented thereby.

     (c)  Certificates for Common Stock which become outstanding (including, 
without limitation, reacquired Common Stock referred to in the last sentence 
of this paragraph (c) that are subsequently issued or distributed by the 
Company) after the Record Date but prior to the earliest of the Distribution 
Date, the Redemption Date or the Final Expiration Date shall have impressed 
on, printed on, written on or otherwise affixed to them the following legend:

          This certificate also evidences and entitles the holder 
     hereof to certain Rights as set forth in a Rights Agreement between 
     Pennaco Energy, Inc. and Harris Trust and Savings Bank (the "Rights 
     Agreement"), the terms of which are hereby incorporated herein by 
     reference and a copy of which is on file at the principal executive 
     offices of Pennaco Energy, Inc.  Under certain circumstances, as 
     set forth in the Rights Agreement, such Rights may be redeemed or 
     be evidenced by separate certificates and will no longer be 
     evidenced by this certificate. Pennaco Energy, Inc. will mail to 
     the holder of this certificate a copy of the Rights Agreement 
     without charge after receipt of a written request therefor. Under 
     certain circumstances, as set forth in the Rights Agreement, Rights 
     owned by or transferred to any Person who becomes an Acquiring 
     Person or an Affiliate or Associate thereof (as such terms are 
     defined in the Rights Agreement), and certain transferees thereof, 
     will become null and void and will no longer be transferable.

     With respect to such certificate containing the foregoing legend, until the
Distribution Date, 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 such certificate shall also constitute the
transfer of the Rights associated with the Common Stock represented thereby.  In
the event that the Company purchases or acquires any Common Stock after the
Record Date but prior to the Distribution Date, any Rights associated with such
Common Stock shall be deemed cancelled and 

                                       -10-

<PAGE>

retired so that the Company shall not be entitled to exercise any Rights 
associated with the Common Stock which are no longer outstanding.

     Section 4.  FORM OF RIGHT CERTIFICATES.  The Right Certificates (and the 
forms of election to purchase shares of Common Stock and of assignment to be 
printed on the reverse thereof) shall be substantially the same as Exhibit A 
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 Sections 11, 13 and 22 
hereof, the Right Certificates shall entitle the holders thereof to purchase 
such number of shares of Common Stock as shall be set forth therein at the 
Purchase Price, but the number of shares of Common Stock and the Purchase 
Price shall be subject to adjustment as provided herein.

     Section 5.  COUNTERSIGNATURE AND REGISTRATION.  (a) The Right 
Certificates shall be executed on behalf of the Company by its Chairman of 
the Board, its Chief Executive Officer, its President, any of its Vice 
Presidents, or its Treasurer, either manually or by facsimile signature, 
shall have affixed thereto the Company's seal or a facsimile thereof, and 
shall be attested by the Secretary or an Assistant Secretary of the Company, 
either manually or by facsimile signature.  The Right Certificates shall be 
manually countersigned by the Rights Agent and shall not be valid for any 
purpose unless countersigned.  In case any officer of the Company who shall 
have signed any of the Right Certificates shall cease to be such officer of 
the Company before countersignature by the Rights Agent and issuance and 
delivery by the Company, such Right Certificates, nevertheless, may 

                                       -11-

<PAGE>

be countersigned by the Rights Agent and issued and delivered by the Company 
with the same force and effect as though the Person who signed such Right 
Certificates had not ceased to be such officer of the Company; and any Right 
Certificate may be signed on behalf of the Company by any Person who, at the 
actual date of the execution of such Right Certificate, shall be a proper 
officer of the Company to sign such Right Certificates although at the date 
of the execution of this Rights Agreement any such Person was not such an 
officer.

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

     Section 6.   TRANSFER, SPLIT UP, COMBINATION AND EXCHANGE OF RIGHT 
CERTIFICATES; MUTILATED, DESTROYED, LOST OR STOLEN RIGHT CERTIFICATES.  (a) 
Subject to the provisions of Section 14 hereof, at any time after the Close 
of Business on the Distribution Date, and at or prior to the Close of 
Business on the earlier of the Redemption Date or the Final Expiration Date, 
any Right Certificate or Right Certificates (other than Right Certificates 
representing Rights that have become void pursuant to Section 11(a)(ii) 
hereof or that have been exchanged pursuant to Section 24 hereof) may be 
transferred, split up, combined or exchanged for another Right Certificate or 
Right Certificates entitling the registered holder to purchase a like number 
of shares of Common Stock as the Right Certificate or Right Certificates 
surrendered then entitled such holder to purchase.  Any registered holder 
desiring to transfer, split up, combine or exchange any Right Certificate or 
Right Certificates shall make such request in writing delivered to the Rights 
Agent, and shall surrender the Right 

                                       -12-

<PAGE>

Certificate or Right 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 Right 
Certificate or Right Certificates, as the case may be, as so requested.  The 
Company may require payment of a sum sufficient to cover any tax or 
governmental charge that may be imposed in connection with any transfer, 
split up, combination or exchange of Right Certificates.

     (b)  Subject to the provisions of Section 11(a)(ii) hereof, at any time 
after the Distribution Date and prior to the close of business on the earlier 
of the Redemption Date and the Final Expiration Date, upon receipt by the 
Company and the Rights Agent of evidence reasonably satisfactory to them of 
the loss, theft, destruction or mutilation of a Right Certificate, and, in 
case of loss, theft or destruction, of indemnity or security reasonably 
satisfactory to them, and, at the Company's request, reimbursement to the 
Company and the Rights Agent of all reasonable expenses incidental thereto, 
and upon surrender to the Rights Agent and cancellation of the Right 
Certificate if mutilated, the Company will make and deliver a new Right 
Certificate of like tenor to the Rights Agent for delivery to the registered 
holder in lieu of the Right Certificate so lost, stolen, destroyed or 
mutilated.

     Section 7.  EXERCISE OF RIGHTS; PURCHASE PRICE; EXPIRATION DATE OF 
RIGHTS. (a) The registered holder of any Right 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 surrender of the Right 
Certificate, with the 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 the appropriate 
number of shares of Common Stock as to which the Rights are exercised, at or 
prior to the earliest of (i) the Close of Business on March 8, 2009 (the 
"Final 

                                       -13-

<PAGE>

Expiration Date"), (ii) the time at which the Rights are redeemed as provided 
in Section 23 hereof (the "Redemption Date") and (iii) the time at which such 
Rights are exchanged as provided in Section 24 hereof.

     (b)  The Purchase Price for each whole share of Common Stock purchasable 
pursuant to the exercise of a Right shall initially be $20, and shall be 
subject to adjustment from time to time as provided in Section 11 or 13 
hereof (the "Purchase Price") and shall be payable in lawful money of the 
United States of America in accordance with paragraph (c) of this Section 7.

     (c)  Upon receipt of a Right Certificate representing exercisable 
Rights, with the form of election to purchase duly executed, accompanied by 
payment of the Purchase Price for the shares to be purchased and an amount 
equal to any applicable transfer tax required to be paid by the holder of 
such Right Certificate in accordance with Section 9 hereof by certified 
check, cashier's check or money order payable to the order of the Company, 
the Rights Agent shall thereupon promptly (i) requisition from any transfer 
agent of the Common Stock certificates for the number of shares of Common 
Stock to be purchased and the Company hereby irrevocably authorizes any such 
transfer agent to comply with all such requests; (ii) when appropriate, 
requisition from the Company the amount of cash to be paid in lieu of 
issuance of fractional shares in accordance with Section 14 hereof; (iii) 
promptly after receipt of such certificates or depositary receipts, cause the 
same to be delivered to or upon the order of the registered holder of such 
Right Certificate, registered in such name or names as may be designated by 
such holder; and (iv) when appropriate, after receipt, deliver such cash to 
or upon the order of the registered holder of such Right Certificate.

     (d)  Except as otherwise provided herein, in case the registered holder 
of any Right Certificate shall exercise less than all the Rights evidenced 
thereby, a new Right Certificate 

                                       -14-

<PAGE>

evidencing Rights equivalent to the Rights remaining unexercised shall be 
issued by the Rights Agent to the registered holder of such Right Certificate 
or to his duly authorized assigns, subject to the provisions of Section 14 
hereof.

     (e)  Notwithstanding anything in this Agreement to the contrary, neither 
the Rights Agent nor the Company shall be obligated to undertake any action 
with respect to a registered holder of Rights upon the occurrence of any 
purported transfer or exercise of Rights pursuant to Section 6 hereof or this 
Section 7 unless such registered holder shall have (i) completed and signed 
the certificate contained in the form of assignment or election to purchase 
set forth on the reverse side of the Rights Certificate surrendered for such 
transfer or exercise and (ii) provided such additional evidence of the 
identity of the Beneficial Owner (or former Beneficial Owner) thereof as the 
Company shall reasonably request.

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

                                       -15-

<PAGE>

     Section 9.  AVAILABILITY OF COMMON STOCK.  (a) The Company covenants and 
agrees that it will cause to be reserved and kept available out of its 
authorized and unissued shares of Common Stock or any shares of Common Stock 
held in its treasury, the number of shares of Common Stock that will be 
sufficient to permit the exercise in full of all outstanding Rights in 
accordance with Section 7.  The Company covenants and agrees that it will 
take all such action as may be necessary to ensure that all shares of Common 
Stock delivered upon exercise of Rights shall at the time of delivery of the 
certificates for such shares of Common Stock (subject to payment of the 
Purchase Price), be duly and validly authorized and issued and fully paid and 
nonassessable shares.

     (b)  So long as the shares of Common Stock (and, following the time that 
a Person becomes an Acquiring Person, shares of Common Stock and other 
securities) issuable upon the exercise of Rights may be listed or admitted to 
trading on any national securities exchange or quotation system, the Company 
shall use its best efforts to cause, from and after such time as the Rights 
become exercisable, all shares reserved for such issuance to be listed or 
admitted to trading on any other exchange or quotation system upon official 
notice of issuance upon such exercise.

     (c)  From and after such time as the Rights become exercisable, the 
Company shall use its best efforts, if then necessary to permit the issuance 
of shares of Common Stock (and following the time that a Person first becomes 
an Acquiring Person, shares of Common Stock and other securities) upon the 
exercise of Rights, to register and qualify such shares of Common Stock (and 
following the time that a Person first becomes an Acquiring Person, shares of 
Common Stock and other securities) under the Securities Act and any 
applicable state securities or "Blue Sky" laws (to the extent exemptions 
therefrom are not available), cause such registration statement and 
qualifications to become effective as soon as possible after such filing and 
keep such registration and 

                                       -16-

<PAGE>

qualifications effective until the earlier of the date as of which the 
Rights are no longer exercisable for such securities and the Final Expiration 
Date.  The Company may temporarily suspend, for a period of time not to 
exceed 90 days, the exercisability of the Rights in order to prepare and file 
a registration statement under the Securities Act and permit it to become 
effective.  Upon any such suspension, the Company shall issue a public 
announcement stating that the exercisability of the Rights has been 
temporarily suspended, as well as a public announcement at such time as the 
suspension is no longer in effect. Notwithstanding any provision of this 
Agreement to the contrary, the Rights shall not be exercisable in any 
jurisdiction unless the requisite qualification in such jurisdiction shall 
have been obtained and until a registration statement under the Securities 
Act (if required) shall have been declared effective.

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

                                       -17-

<PAGE>

     Section 10.  COMMON STOCK RECORD DATE.  Each Person in whose name any 
certificate for shares of Common Stock is issued upon the exercise of Rights 
shall for all purposes be deemed to have become the holder of record of the 
shares of Common Stock represented thereby on, and such certificate shall be 
dated, the date upon which the Right Certificate evidencing such Rights was 
duly surrendered and payment of the Purchase Price (and any applicable 
transfer taxes) was made; PROVIDED, HOWEVER, that if the date of such 
surrender and payment is a date upon which the Common Stock 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 Common Stock transfer books of the 
Company are open.  Prior to the exercise of the Rights evidenced thereby, the 
holder of a Right Certificate shall not be entitled to any rights of a holder 
of Common Stock 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.

     Section 11.  ADJUSTMENT OF PURCHASE PRICE, NUMBER OF SHARES OR NUMBER OF 
RIGHTS.  The Purchase Price, the number of shares of Common Stock or other 
securities or property 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 Common Stock payable in Common
     Stock, (B) subdivide the outstanding Common Stock, (C) combine the
     outstanding Common Stock into a smaller number of shares of Common Stock or
     (D) issue any shares of its capital stock in a re-

                                       -18-

<PAGE>

     classification of the Common Stock (including any such reclassification 
     in connection with a consolidation or merger in which the Company is the 
     continuing or surviving corporation), except as otherwise provided in 
     this Section 11(a), the Purchase Price in effect at the time of the 
     record date for such dividend or of the effective date of such 
     subdivision, combination or reclassification, and the number and kind of 
     shares of capital stock issuable on such date, shall be proportionately 
     adjusted so that the holder of any Right exercised after such time shall 
     be entitled to receive the aggregate number and kind of shares of 
     capital stock which, if such Right had been exercised immediately prior 
     to such date and at a time when the Common Stock transfer books of the 
     Company were open, such holder would have owned upon such exercise and 
     been entitled to receive by virtue of such dividend, subdivision, 
     combination or reclassification; PROVIDED, HOWEVER, that in no event 
     shall the consideration to be paid upon the exercise of one Right be 
     less than the aggregate par value of the shares of capital stock of the 
     Company issuable upon exercise of one Right.

          (ii)  Subject to Sections 23 and 24 of this Agreement, in the event
     any Person becomes an Acquiring Person (the first occurrence of such event
     being a "Section 11(a)(ii) Event"), then (A) the Purchase Price shall be
     adjusted to be the Purchase Price in effect immediately prior to such
     Person becoming an Acquiring Person multiplied by the number of one-half
     shares of Common Stock for which a Right was exercisable immediately prior
     to such Person becoming an Acquiring Person, whether or not such Right was
     then exercisable, and (B) each holder of a Right, except as otherwise
     provided in this Section 11(a)(ii) and Subsection 11(a)(iii) hereof, shall
     thereafter have the right to receive, upon exercise at a price equal to the
     Purchase Price (as so adjusted), in accordance with the 

                                       -19-

<PAGE>

     terms of this Agreement, 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 number of one-half shares of Common Stock 
     for which a Right is then exercisable and dividing that product by (y) 50%
     of the then current per share market price of the Company's Common Stock 
     (determined pursuant to Section 11(d) hereof) on the date such Person 
     became an Acquiring Person; PROVIDED, HOWEVER, that the Purchase Price 
     and the number of shares of Common Stock so receivable upon exercise of 
     a Right shall thereafter be subject to further adjustment as appropriate 
     in accordance with Section 11(f) hereof.  Notwithstanding anything in 
     this Agreement to the contrary, however, from and after the time (the 
     "Invalidation Time") when any Person first becomes an Acquiring Person, 
     any Rights that are beneficially owned by (x) any Acquiring Person (or 
     any Affiliate or Associate of any Acquiring Person), (y) a transferee of 
     any Acquiring Person (or any such Affiliate or Associate) who becomes a 
     transferee after the Invalidation Time or (z) a transferee of any 
     Acquiring Person (or any such Affiliate or Associate) who became a 
     transferee prior to or concurrently with the Invalidation Time pursuant 
     to either (I) a transfer from the Acquiring Person to holders of its 
     equity securities or to any person with whom it has any continuing 
     agreement, arrangement or understanding regarding the transferred Rights 
     or (II) a transfer which the Board of Directors has determined is part 
     of a plan, arrangement or understanding which has the purpose or effect 
     of avoiding the provisions of this paragraph, and subsequent transferees 
     of such Persons, shall be void without any further action, and any 
     holder of such Rights shall thereafter have no rights whatsoever with 
     respect to such Rights under any provision of this Agreement.  The 
     Company shall use all reasonable efforts to ensure that the 

                                       -20-

<PAGE>

     provisions of this Section 11(a)(ii) are complied with, but shall have 
     no liability to any holder of Right Certificates or other Person as a 
     result of its failure to make any determinations with respect to an 
     Acquiring Person or its Affiliates, Associates or transferees hereunder.  
     From and after the Invalidation Time, no Right Certificate shall be 
     issued pursuant to Section 3 or Section 6 hereof that represents Rights 
     that are or have become void pursuant to the provisions of this 
     paragraph, and any Right Certificate delivered to the Rights Agent that 
     represents Rights that are or have become void pursuant to the 
     provisions of this paragraph shall be cancelled.  From and after the 
     occurrence of an event specified in Section 13(a) hereof, any Rights 
     that theretofore have not been exercised pursuant to this Section 
     11(a)(ii) shall thereafter be exercisable only in accordance with 
     Section 13 and not pursuant to this Section 11(a)(ii).  Notwithstanding 
     the occurrence of an adjustment in accordance with this Section 
     11(a)(ii), the Rights (other than those that have been invalidated 
     pursuant to this Section 11(a)(ii)), shall remain subject to redemption 
     pursuant to Section 23 hereof on the terms set forth herein.
     
          (iii) In the event that there shall not be sufficient shares of
     Common Stock issued but not outstanding or authorized but unissued to
     permit the exercise in full of the Rights in accordance with the
     subparagraph (ii) of this Section 11(a), the Company shall take all such
     action as may be necessary to authorize additional shares of Common Stock
     for issuance upon exercise of the Rights.  In the event the Company shall,
     after good faith effort, be unable to take all such action as may be
     necessary to authorize such additional shares of Common Stock the Company
     shall, to the extent permitted by applicable law and any material
     agreements then in effect to which the Company is a party, (A) determine
     the excess 

                                       -21-

<PAGE>

     of (1) the value of the shares of Common Stock issuable upon the exercise 
     of a Right in accordance with the foregoing subparagraph (ii) (the 
     "Current Value") over (2) the then current Purchase Price multiplied by 
     the number of shares of Common Stock for which a Right was exercisable 
     immediately prior to the time that the Acquiring Person became such 
     (such excess, the "Spread"), and (B) with respect to each Right (other 
     than Rights which have become void pursuant to Section 11(a)(ii)), make 
     adequate provision to substitute for the shares of Common Stock issuable 
     in accordance with subparagraph (ii) upon exercise of the Right and 
     payment of the applicable Purchase Price, (1) cash, (2) a reduction in 
     the Purchase Price, (3) shares of Common Stock or other equity 
     securities of the Company (including, without limitation, shares or 
     fractions of shares of preferred stock which, by virtue of having 
     dividend, voting and liquidation rights substantially comparable to 
     those of the shares of Common Stock, are deemed in good faith by the 
     Board of Directors to have substantially the same value as the shares of 
     Common Stock (such shares of preferred stock and shares or fractions of 
     shares of preferred stock are hereinafter referred to as "Common Stock 
     equivalents")), (4) debt securities of the Company, (5) other assets, or 
     (6) any combination of the foregoing, having a value which, when added 
     to the value of the shares of Common Stock actually issued upon exercise 
     of such Right, shall have an aggregate value equal to the Current Value 
     (less the amount of any reduction in the Purchase Price), where such 
     aggregate value has been determined by the Board of Directors upon the 
     advice of a nationally recognized investment banking firm selected in 
     good faith by the Board of Directors; PROVIDED, HOWEVER, that if the 
     Company shall not make adequate provision to deliver value pursuant to 
     clause (B) above within 30 days following the date that the 

                                       -22-

<PAGE>

     Acquiring Person became such (the "Section 11(a)(iii) Trigger Date"), then
     the Company shall be obligated to deliver, to the extent permitted 
     by applicable law and any material agreements then in effect to which 
     the Company is a party, upon the surrender for exercise of a Right and 
     without requiring payment of the Purchase Price, shares of Common Stock 
     (to the extent available), and then, if necessary, such number of 
     fractions of shares of Common Stock (to the extent available) and then, 
     if necessary, cash, which shares and/or cash have an aggregate value 
     equal to the Spread. If, upon the date any Person becomes an Acquiring 
     Person, the Board of Directors shall determine in good faith that it is 
     likely that sufficient additional shares of Common Stock could be 
     authorized for issuance upon exercise in full of the Rights, then, if 
     the Board of Director so elects, the 30-day period set forth above may 
     be extended to the extent necessary, but not more than 90 days after the 
     Section 11(a)(iii) Trigger Date, in order that the Company may seek 
     stockholder approval for the authorization of such additional shares 
     (such 30-day period, as it may be extended, is herein called the 
     "Substitution Period").  To the extent that the Company determines that 
     some action need be taken pursuant to the second and/or third sentence 
     of this Section 11(a)(iii), the Company (x) shall provide, subject to 
     Section 11(a)(ii) hereof and the last sentence of this Section 
     11(a)(iii) hereof, that such action shall apply uniformly to all 
     outstanding Rights and (y) may suspend the exercisability of the Rights 
     until the expiration of the Substitution Period in order to seek any 
     authorization of additional shares and/or to decide the appropriate form 
     of distribution to be made pursuant to such second sentence and to 
     determine the value thereof.  In the event of any such suspension, the 
     Company shall issue a public announcement stating that the 
     exercisability of the Rights has been temporarily 

                                       -23-

<PAGE>

     suspended, as well as a public announcement at such time as the suspension
     is no longer in effect.  For purposes of this Section 11(a)(iii), the 
     value of the shares of Common Stock shall be the current per share 
     market price (as determined pursuant to Section 11(d)(i)) on the Section 
     11(a)(iii) Trigger Date and the per share or fractional value of any 
     "Common Stock equivalent" shall be deemed to equal the current per share 
     market price of the Common Stock.  The Board of Directors of the Company 
     may, but shall not be required to, establish procedures to allocate the 
     right to receive shares of Common Stock upon the exercise of the Rights 
     among holders of Rights pursuant to this Section 11(a)(iii).

     (b)  In case the Company shall fix a record date for the issuance of 
rights, options or warrants to all holders of shares of Common Stock 
entitling them (for a period expiring within 45 calendar days after such 
record date) to subscribe for or purchase shares of Common Stock or Common 
Stock equivalents or securities convertible into shares of Common Stock or 
Common Stock equivalents at a price per share of Common Stock or Common Stock 
equivalent (or having a conversion price per share, if a security convertible 
into shares of Common Stock or Common Stock equivalent) less than the then 
current per share market price of the Common 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 
Common Stock outstanding on such record date plus the number of shares of 
Common Stock which the aggregate offering price of the total number of shares 
of Common Stock and/or Common Stock equivalent so 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 Common Stock 

                                       -24-

<PAGE>

outstanding on such record date plus the number of additional shares of 
Common Stock and/or Common Stock equivalents to be offered for subscription 
or purchase (or into which the convertible securities so to be offered are 
initially convertible); PROVIDED, HOWEVER, that in no event shall the 
consideration to be paid upon the exercise of one Right be less than the 
aggregate par value of the shares of capital stock of the Company issuable 
upon exercise of one Right.  In case such subscription price may be paid in a 
consideration part or all of which shall be in a form other than cash, the 
value of such consideration shall be as determined in good faith by the Board 
of Directors of the Company, whose determination shall be described in a 
statement filed with the Rights Agent.  Shares of Common 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, 
options or warrants are not so issued, the Purchase Price shall be adjusted 
to be the Purchase Price that would then be in effect if such record date had 
not been fixed.

     (c)  In case the Company shall fix a record date for the making of a 
distribution to all holders of Common Stock (including any such distribution 
made in connection with a consolidation or merger in which the Company is the 
continuing or surviving corporation) of evidences of indebtedness or assets 
(other than a regular quarterly cash dividend or a dividend payable in Common 
Stock) or subscription rights or warrants (excluding those referred to in 
Section 11(b) hereof), the Purchase Price to be in effect after such record 
date shall be determined by multiplying the Purchase Price in effect 
immediately prior to such record date by a fraction, the numerator of which 
shall be the then current per share market price of the Common Stock on such 
record date, less the fair market value (as determined in good faith by the 
Board of Directors of the Company, whose 

                                       -25-

<PAGE>

determination shall be described in a statement filed with the Rights Agent) 
of the portion of the assets or evidences of indebtedness so to be 
distributed or of such subscription rights or warrants applicable to one 
share of Common Stock and the denominator of which shall be such current per 
share market price of the Common Stock; PROVIDED, HOWEVER, that in no event 
shall the consideration to be paid upon the exercise of one Right be less 
than the aggregate par value of the shares of capital stock of the Company to 
be issued upon exercise of one Right.  Such adjustments shall be made 
successively whenever such a record date is fixed; and in the event that such 
distribution is not so made, the Purchase Price shall again be adjusted to be 
the Purchase Price which would then be in effect if such record date had not 
been fixed.

     (d)(i)  For the purpose of any computation hereunder, the "current per
share market price" of any security (a "Security" for the purpose of this
Section 11(d)(i)) on any date shall be deemed to be the average of the daily
closing prices per share of such Security for the 30 consecutive Trading Days
immediately prior to such date; PROVIDED, HOWEVER, that in the event that the
current per share market price of the Security is determined during a period
following the announcement by the issuer of such Security of (A) a dividend or
distribution on such Security payable in shares of such Security or securities
convertible into such shares, or (B) any subdivision, combination or
reclassification of such Security and prior to the expiration of 30 Trading Days
after the ex-dividend date for such dividend or distribution, or the record date
for such subdivision, combination or reclassification then, and in each such
case, the current per share market price shall be appropriately adjusted to
reflect the current market price per share equivalent of such Security.  The
closing price for each day shall be the last sale price, regular way, or, in
case no such sale takes place on such day, the average of the closing bid and
asked prices, regular way in either case, as reported in the principal
consolidated 

                                       -26-

<PAGE>

transaction reporting system with respect to securities listed on the 
principal national securities exchange on which the Security is listed or 
admitted to trading or, if the Security is not listed or admitted to trading 
on any national securities exchange, the last quoted price or, if not so 
quoted, the average of the high bid and low asked prices in the 
over-the-counter market, as reported by Nasdaq or such other system then in 
use, or, if on any such date the Security is not quoted by any such 
organization, the average of the closing bid and asked prices as furnished by 
a professional market maker making a market in the Security selected by the 
Board of Directors of the Company.  The term "Trading Day" shall mean a day 
on which the principal national securities exchange on which the Security is 
listed or admitted to trading is open for the transaction of business or, if 
the Security is not listed or admitted to trading on any national securities 
exchange on which the security is listed or admitted to trading on any 
national securities exchange, a Business Day.

     (ii) For the purpose of an computation hereunder, the "current per share 
market price" of the Common Stock shall be determined in accordance with the 
method set forth in Section 11(d)(i).  If the Common Stock is not publicly 
held or so listed or traded, "current per share market price" shall mean the 
fair value per share as determined in good faith by the Board of Directors of 
the Company, whose determination shall be described in a statement filed with 
the Rights Agent.

     (e)  No adjustment in the Purchase Price shall be required unless such 
adjustment would require an increase or decrease of at least 1% in the 
Purchase Price; PROVIDED, HOWEVER, that any adjustments which by reason of 
this Section 11(e) are not required to be made shall be carried forward and 
taken into account in any subsequent adjustment.  All calculations under this 
Section 11 shall be made to the nearest cent or to the nearest one 
ten-thousandth of a share of Common Stock 

                                       -27-

<PAGE>

or one ten-thousandth of any other share or security as the case may be.  
Notwithstanding the first sentence of this Section 11(e), any adjustment 
required by this Section 11 shall be made no later than the earlier of (i) 
three years from the date of the transaction which require such adjustment 
and (ii) the date of the expiration of the right to exercise any Rights.

     (f)  If, as a result of an adjustment made pursuant to Section 11(a) 
hereof, the holder of any Right thereafter exercised shall become entitled to 
receive any shares of capital stock of the Company other than Common 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 Common Stock contained in Section 11(a) through (c), inclusive, and the 
provisions of Sections 7, 9, 10 and 13 with respect to the Common 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 one-half shares of 
Common Stock purchasable from time to time hereunder upon exercise of the 
Rights, all subject to further adjustment as provided herein.

     (h)  Unless the Company shall have exercised its election as provided in 
Section 11(i), upon each adjustment of the Purchase Price as a result of the 
calculations made in Sections 11(b) and (c), each Right outstanding 
immediately prior to the making of such adjustment shall thereafter evidence 
the right to purchase, at the adjusted Purchase Price, that number of 
one-half shares of Common Stock (calculated to the nearest one ten-thousandth 
of a share of Common Stock) obtained by (A) multiplying (x) the number of 
one-half shares of Common Stock covered by a Right immediately prior to this 
adjustment by (y) the Purchase Price in effect immediately prior to such 

                                       -28-

<PAGE>


adjustment of the Purchase Price and (B) 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 one-half shares of Common Stock purchasable upon 
the exercise of a Right.  Each of the Rights outstanding after such 
adjustment of the number of Rights shall be exercisable for the number of 
one-half shares of Common 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 ten-thousandth) obtained by dividing the Purchase Price in effect 
immediately prior to adjustment of the Purchase Price by the Purchase Price 
in effect immediately after adjustment of the Purchase Price.  The Company 
shall make a public announcement of its election to adjust the number of 
Rights, indicating the record date for the adjustment and, if known at the 
time, the amount of the adjustment to be made.  This record date may be the 
date on which the Purchase Price is adjusted or any day thereafter, but, if 
the Right Certificates have been issued, such record date shall be at least 
10 days later than the date of the public announcement.  If Right 
Certificates have been issued, upon each adjustment of the number of Rights 
pursuant to this Section 11(i), the Company shall, as promptly as 
practicable, cause to be distributed to holders of record of Right 
Certificates on such record date Right Certificates evidencing, subject to 
Section 14 hereof, the additional Rights to which such holders shall be 
entitled as a result of such adjustment, or, at the option of the Company, 
shall cause to be distributed to such holders of record in substitution and 
replacement for the Right Certificates held by such holders prior to the date 
of adjustment, and upon surrender thereof, if required by the Company, new 
Right Certificates 

                                       -29-

<PAGE>

evidencing all the Rights to which such holders shall he entitled after such 
adjustment.  Right Certificates to be so distributed shall be issued, 
executed and countersigned in the manner provided for herein and shall be 
registered in the names of the holders of record of Right Certificates on the 
record date specified in the public announcement.

     (j)  Irrespective of any adjustment or change in the Purchase Price or 
the number of one-half shares of Common Stock issuable upon the exercise of 
the Rights, the Right Certificates theretofore and thereafter issued may 
continue to express the Purchase Price and the number of one-half shares of 
Common Stock which were expressed in the initial Right Certificates issued 
hereunder.

     (k)  Before taking any action that would cause an adjustment reducing 
the Purchase Price below the then par value, if any, of the Common Stock or 
other shares of capital stock issuable upon exercise of the Rights, the 
Company shall take any corporate action which may, in the opinion of its 
counsel, be necessary in order that the Company may validly and legally issue 
fully paid and nonassessable shares of Common Stock or other such shares at 
such adjusted Purchase Price.

     (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 
of the Common Stock and other capital stock or securities of the Company, if 
any, issuable upon such exercise over and above the Common 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.

                                       -30-

<PAGE>

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

     (n)  In the event that at any time after the date of this Agreement and 
prior to the Distribution Date, the Company shall (i) declare or pay any 
dividend on the Common Stock payable in Common Stock or (ii) effect a 
subdivision, combination or consolidation of the Common Stock (by 
reclassification or otherwise than by payment of dividends in Common Stock) 
into a greater or lesser number of shares of Common Stock, then in any such 
case the Rights 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 Stock immediately prior to such event by 
a fraction, of which the numerator shall be equal to the number of shares of 
Common Stock outstanding immediately before such event and of which the 
denominator is the number of shares of Common Stock outstanding immediately 
after such event.  The adjustments provided for in this Section 11(n) shall 
be made successively whenever such a dividend is declared or paid or such a 
subdivision, combination or consolidation is effected.

                                       -31-

<PAGE>

     Section 12.  CERTIFICATE OF ADJUSTED PURCHASE PRICE OR NUMBER OF SHARES. 
Whenever an adjustment is made as provided in Section 11 or 13 hereof, the 
Company shall promptly (a) prepare a certificate setting forth such 
adjustment, and a brief statement of the facts accounting for such 
adjustment, (b) file with the Rights Agent and with each transfer agent for 
the Common Stock a copy of such certificate and (c) mail a brief summary 
thereof to each holder of a Right Certificate in accordance with Section 23 
hereof.  The Rights Agent shall be fully protected in relying on any such 
certificate and on any adjustment therein contained and shall not be 
obligated or responsible for calculating any adjustment nor shall it be 
deemed to have knowledge of such adjustment unless and until it shall have 
received such certificate.

     Section 13.  CONSOLIDATION, MERGER OR SALE OR TRANSFER OF ASSETS OR 
EARNING POWER.  (a) In the event, directly or indirectly, at any time after a 
Person has become an Acquiring Person, (i) the Company shall consolidate 
with, or merge with and into, any other Person, (ii) any Person shall 
consolidate with the Company, or merge with and into the Company and the 
Company shall be the continuing or surviving corporation of such merger and, 
in connection with such merger, all or part of the Common Stock shall be 
changed into or exchanged for stock or other securities of any other Person 
(or the Company) or cash or any other property, or (iii) the Company shall 
sell or otherwise transfer (or one or more of its Subsidiaries shall sell or 
otherwise transfer), in one or more transactions, assets or earning power 
aggregating 50% or more of the assets or earning power of the Company and its 
Subsidiaries (taken as a whole) to any other Person (other than the Company 
or one or more of its wholly-owned Subsidiaries), then, and in each such 
case, proper provision shall be made so that (A) each holder of a Right 
(other than Rights that have become void pursuant to Section 11(a)(ii)) shall 
thereafter have the right to receive, upon the exercise thereof at a price 
equal 

                                       -32-

<PAGE>

to the then current Purchase Price multiplied by the number of one-half 
shares of Common Stock for which a Right is then exercisable, in accordance 
with the terms of this Agreement and in lieu of shares of Common Stock, such 
number of validly issued, fully paid and non-assessable and freely tradeable 
shares of Common Stock of the Principal Party (as defined herein) not subject 
to any liens, encumbrances, rights of first refusal or other adverse claims, 
as shall equal the result obtained by (I) multiplying the then current 
Purchase Price by the number of one-half shares of Common Stock for which a 
Right is then exercisable and dividing that product by (II) 50% of the then 
current per share market price of the Common Stock of such Principal Party 
(determined in accordance to Section 11(d)(i) hereof) on the date of 
consummation of such consolidation, merger, sale or transfer; PROVIDED that 
the Purchase Price and the number of shares of Common Stock of such Principal 
Party issuable upon exercise of each Right shall be further adjusted as 
provided in Section 11(f) of this Agreement to reflect any events occurring 
in respect of such Principal Party after the date of such consolidation, 
merger, sale or transfer; (B) 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; (C) the term "Company" shall thereafter be deemed to refer to such 
Principal Party; and (D) such Principal Party shall take such steps 
(including, but not limited to, the reservation of a sufficient number of its 
shares of Common Stock in accordance with Section 9 hereof) in connection 
with such consummation of any such transaction as may be necessary to assure 
that the provisions hereof shall thereafter be applicable, as nearly as 
reasonably may be, in relation to the shares of its Common Stock thereafter 
deliverable upon the exercise of the Rights; provided that, upon the 
subsequent occurrence of any consolidation, merger, sale or transfer of 
assets or other extraordinary transaction in respect of such Principal Party, 
each holder of a Right 

                                       -33-

<PAGE>

shall thereupon be entitled to receive, upon exercise of a Right and payment 
of the Purchase Price as provided in this Section 13(a), such cash, shares, 
rights, warrants and other property which such holder would have been 
entitled to receive had such holder, at the time of such transaction, owned 
the Common Stock of the Principal Party receivable upon the exercise of a 
Right pursuant to this Section 13(a), and such Principal Party shall take 
such steps (including, but not limited to, reservation of shares of stock) as 
may be necessary to permit the subsequent exercise of the Rights in 
accordance with the terms hereof for such cash, shares, rights, warrants and 
other property.

     (b)  As used in this Section 13, "Principal Party" shall mean

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

          (ii)  in the case of any transaction described in clause (iii) of the
     first sentence in Section 13(a) hereof, the Person that is the party
     receiving the greatest portion of the assets or earning power transferred
     pursuant to such transaction or transactions, or, if each Person that is a
     party to such transaction or transactions receives the same portion of the
     assets or 

                                       -34-

<PAGE>

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

     (c)  The Company shall not consummate any consolidation, merger, sale or 
transfer referred to in Section 13(a) hereof unless prior thereto the Company 
and the Principal Party involved therein shall have executed and delivered to 
the Rights Agent an agreement confirming that the requirements of Sections 
13(a) and (b) hereof shall promptly be performed in accordance with their 


                                       -35-

<PAGE>

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

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

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

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

                                       -36-

<PAGE>

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

     (d)  In case the Principal Party has provision in any of its authorized 
securities or in its certificate of incorporation or by-laws or other 
instrument governing its corporate affairs, which provision would have the 
effect of (i) causing such Principal Party to issue (other than to holders of 
Rights pursuant to this Section 13), in connection with, or as a consequence 
of, the consummation of a transaction referred to in this Section 13, shares 
of Common Stock of such Principal Party at less than the then current per 
share market price thereof (determined pursuant to Section 11(d) hereof) or 
securities exercisable for, or convertible into, Common Stock of such 
Principal Party at less than such then current per share market price, or 
(ii) providing for any special payment, tax or similar provision in 
connection with the issuance of the Common Stock of such Principal Party 
pursuant to the provisions of Section 13, then, in such event, the Company 
hereby agrees with each holder of Rights that it shall not consummate any 
such transaction unless prior thereto the Company and such Principal Party 
shall have executed and delivered to the Rights Agent a supplemental 
agreement providing that the provision in question of such Principal Party 
shall have been cancelled, waived or amended, or that the authorized 
securities shall be redeemed, so that the applicable provision will have no 
effect in connection with, or as a consequence of, the consummation of the 
proposed transaction.

     (e)  The Company covenants and agrees that it shall not, at any time 
after a Person first becomes an Acquiring Person enter into any transaction 
of the type contemplated by any of clauses (i) - (iii) of Section 13(a) 
hereof if (x) at the time of or immediately after such consolidation, 

                                       -37-

<PAGE>

merger, sale, transfer or other transaction there are any rights, warrants or 
other instruments or securities outstanding or agreements in effect which 
would substantially diminish or otherwise eliminate the benefits intended to 
be afforded by the Rights, (y) prior to, simultaneously with or immediately 
after such consolidation, merger, sale, transfer of other transaction, the 
stockholders of the Person who constitutes, or would constitute, the 
Principal Party for purposes of Section 13(a) hereof shall have received a 
distribution of Rights previously owned by such Person or any of its 
Affiliates or Associates or (z) the form or nature of organization of the 
Principal Party would preclude or limit the exercisability of the Rights.

     Section 14.  FRACTIONAL RIGHTS AND FRACTIONAL SHARES.  (a) The Company 
shall not be required to issue fractions of Rights or to distribute Right 
Certificates which evidence fractional Rights.  In lieu of such fractional 
Rights, there shall be paid to the registered holders of the Right 
Certificates with regard to which such fractional Rights would otherwise be 
issuable, an amount in cash equal to the same fraction of the current market 
value of a whole Right.  For the purposes of this Section 14(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 for any day shall be 
the last sale price, regular way, or, in case no such sale takes place on 
such day, the average of the closing bid and asked prices, regular way, in 
either case, as reported in the principal consolidated transaction reporting 
system with respect to securities listed on the principal national securities 
exchange on which the Rights are listed or admitted to trading or, if the 
Rights are not listed or admitted to trading on any national securities 
exchange, the last quoted price or, if not so quoted, the average of the high 
bid and low asked prices in the over-the-counter market, as reported by 
Nasdaq or such other system then in use or, if on any 

                                       -38-

<PAGE>

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 in good faith 
by the Board of Directors of the Company shall be used.

     (b)  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 upon the exercise or exchange of Rights.  In lieu of such 
fractional shares of Common Stock, the Company shall pay to the registered 
holders of the Right Certificates with regard to which such fractional shares 
of Common Stock would otherwise be issuable an amount in cash equal to the 
same fraction of the current market value of a whole share of Common Stock 
(as determined in accordance with Section 14(a) hereof) for the Trading Day 
immediately prior to the date of such exercise or exchange.

     (c)  The holder of a Right by the acceptance of the Right expressly 
waives his right to receive any fractional Rights or any fractional shares 
upon exercise of a Right (except as provided above).

     Section 15.  RIGHTS OF ACTION.  All rights of action in respect of this 
Agreement, excepting the rights of action given to the Rights Agent under 
Section 18 hereof, are vested in the respective registered holders of the 
Right Certificates (and, prior to the Distribution Date, the registered 
holders of the Common Stock); and any registered holder of any Right 
Certificate (or, prior to the Distribution Date, of the Common Stock), 
without the consent of the Rights Agent or of the holder of any other Right 
Certificate (or, prior to the Distribution Date, of the Common Stock), may, 
in his 

                                       -39-

<PAGE>

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 Right 
Certificate in the manner provided in such Right Certificate and in this 
Agreement.  Without limiting the foregoing or any remedies available to the 
holders of Rights, it is specifically acknowledged that the holders of Rights 
would not have an adequate remedy at law for any breach of this Agreement and 
will be entitled to specific performance of the obligations under, and 
injunctive relief against actual or threatened violations of the obligations 
of any Person subject to, this Agreement.

     Section 16.  AGREEMENT OF RIGHT HOLDERS.  Every holder of a Right, by 
accepting the same, consents and agrees with the Company and the Rights Agent 
and with every other holder of a Right thus:

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

          (b)   after the Distribution Date, the Right Certificates are
     transferable only on the registry books of the Rights Agent if surrendered
     at the principal office or agency of the Rights Agent designated for such
     purpose, 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 the Right Certificate (or, prior to the Distribution Date,
     the associated Common Stock certificate) is registered as the absolute
     owner thereof and of the Rights evidenced thereby (notwithstanding any
     notations of ownership or writing on the Right Certificates or the
     associated Common Stock certificate made by anyone other than the Company
     or the Rights 

                                       -40-

<PAGE>

     Agent) for all purposes whatsoever, and neither the Company nor the Rights 
     Agent shall be affected by any notice to the contrary.

     Section 17.  RIGHT CERTIFICATE HOLDER NOT DEEMED A STOCKHOLDER.  No 
holder, as such, of any Right Certificate shall be entitled to vote, receive 
dividends or be deemed for any purpose the holder of Common Stock or any 
other securities of the Company which may at any time be issuable on the 
exercise of the Rights represented thereby, nor shall anything contained 
herein or in any Right Certificate be construed to confer upon the holder of 
any Right Certificate, as such, any of the rights of a stockholder of the 
Company or any right to vote for the election of directors or upon any matter 
submitted to stockholders at any meeting thereof, or to give or withhold 
consent to any corporate action, or to receive notice of meetings or other 
actions affecting stockholders (except as provided in Section 25 hereof), or 
to receive dividends or subscription rights, or otherwise, until the Right or 
Rights evidenced by such Right Certificate shall have been exercised in 
accordance with the provisions hereof.

     Section 18.  CONCERNING THE RIGHTS AGENT.  (a) 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 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 

                                       -41-

<PAGE>

costs and expenses of enforcing this right of indemnification shall also be 
paid by the company.  The indemnification provided for hereunder shall 
survive the expiration of the Rights and the termination of this Agreement.

     (b)  The Rights Agent may conclusively rely upon and shall be protected 
and shall incur no liability for, or in respect of any action taken, suffered 
or omitted by it in connection with, its administration of this Agreement in 
reliance upon any Right Certificate or certificate for the 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, or otherwise upon the advice 
of counsel as set forth in Section 20 hereof.  Notwithstanding anything in 
this Agreement to the contrary, in no event shall the Rights Agent be liable 
for special, indirect or consequential loss or damage of any kind whatsoever 
(including but not limited to lost profits), even if the Rights Agent has 
been advised of the likelihood of such loss or damage and regardless of the 
form of the action.

     (c)  Notwithstanding anything in this Agreement to the contrary, in no 
event shall the Rights Agent be liable for special, indirect or consequential 
loss or damage of any kind whatsoever (including but not limited to lost 
profits), even if the Rights Agent has been advised of the likelihood of such 
loss or damage and regardless of the form of the action.

     Section 19.  MERGER OR CONSOLIDATION OR CHANGE OF NAME OF RIGHTS AGENT. 
(a) Any corporation into which the Rights Agent or any successor Rights Agent 
may be merged or with which it may be consolidated, or any corporation 
resulting from any merger or consolidation to which the Rights Agent or any 
successor Rights Agent shall be a party, or any corporation 

                                       -42-

<PAGE>

succeeding to the stock transfer or corporate trust powers 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 would be eligible for appointment as a successor Rights Agent 
under the provisions of Section 21 hereof.  In case at the time such 
successor Rights Agent shall succeed to the agency created by this Agreement, 
any of the Right Certificates shall have been countersigned but not 
delivered, any such successor Rights Agent may adopt the countersignature of 
the predecessor Rights Agent and deliver such Right Certificates so 
countersigned; and in case at that time any of the Right Certificates shall 
not have been countersigned, any successor Rights Agent may countersign such 
Right Certificates either in the name of the predecessor Rights Agent or in 
the name of the successor Rights Agent; and in all such cases such Right 
Certificates shall have the full force provided in the Right Certificates and 
in this Agreement.

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

     Section 20.  DUTIES OF RIGHTS AGENT.  The Rights Agent undertakes the 
duties and obligations imposed by this Agreement upon the following terms and 
conditions, by all of which the Company 

                                       -43-

<PAGE>

and the holders of Right Certificates, by their acceptance thereof, shall be 
bound, and no implied duties or obligations shall be read into this Agreement 
against the Rights Agent: 

          (a)   Before the Rights Agent acts or refrains from acting, it may
     consult with legal counsel (who may be legal counsel for the Company), and
     the opinion of such counsel shall be full and complete authorization and
     protection to the Rights Agent as to any action taken or omitted 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 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 my one of the Chairman of
     the Board, the Chief Executive Officer, the President, any Vice President,
     the Treasurer or the 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 to the Company and
     any other Person 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
     Right Certificates (except its countersignature thereof) or be required to
     verify the same, but all such statements and recitals are and shall be
     deemed to have been made by the Company only.

                                       -44-

<PAGE>

          (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 Right Certificate (except its
     countersignature thereof); nor shall it be responsible for any breach by
     the Company of any covenant or condition contained in this Agreement or in
     any Right Certificate; nor shall it be responsible for any change in the
     exercisability of the Rights (including the Rights becoming void in
     accordance with Section 11(a)(ii) hereof) or any adjustment in the terms of
     the Rights (including the manner, method or amount thereof) provided for in
     Section 3, 11, 13, 23 or 24, or the ascertaining of the existence of facts
     that would require any such change or adjustment (except with respect to
     the exercise of Rights evidenced by Right Certificates after actual notice
     that such change or adjustment is required); nor shall it by any act
     hereunder be deemed to make any representation or warranty as to the
     authorization or reservation of any Common Stock to be issued pursuant to
     this Agreement or any Right Certificate or as to whether any Common Stock
     will, when issued, be validly authorized and issued, fully paid and
     nonassessable.

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

          (g)   The Rights Agent is hereby authorized and directed to accept
     instructions with respect to the performance of its duties hereunder from
     any one of the Chairman of the Board, the Chief Executive Officer, the
     President, any Vice President, the Secretary or the 

                                       -45-

<PAGE>

     Treasurer of the Company, and to apply to such officers for advice or 
     instructions in connection with its duties, and it shall not be liable 
     for any action taken or suffered by it in good faith in accordance with 
     instructions of any such officer or for any delay in acting while 
     waiting for those instructions. Any application by the Rights Agent for 
     written instructions from the Company may, at the option of the Rights 
     Agent, set forth in writing any action proposed to be taken or omitted 
     by the Rights Agent under this Agreement and the date on and/or after 
     which such action shall be taken or such omission shall be effective.  
     The Rights Agent shall not be liable for any action taken by, or 
     omission of, the Rights Agent in accordance with a proposal included in 
     any such application on or after the date specified in such application 
     (which date shall not be less than five Business Days after the date any 
     officer of the Company actually receives such application, unless any 
     such officer shall have consented in writing to an earlier date) unless, 
     prior to taking any such action (or the effective date in the case of an 
     omission), the Rights Agent shall have received written instructions in 
     response to such application specifying the action to be taken or 
     omitted.

          (h)   The Rights Agent and any stockholder, director, officer or
     employee of the Rights Agent may buy, sell or deal in any of the Rights or
     other securities of the Company or become pecuniarily interested in any
     transaction in which the Company may be interested, or contract with or
     lead 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 

                                       -46-

<PAGE>

     or agents, and the Rights Agent shall not be answerable or accountable for
     any act, default, neglect or misconduct of any such attorneys or agents or
     for any loss to the Company resulting from any such act, default, neglect 
     or misconduct.

          (j)   If, with respect to any Rights Certificate surrendered to the
     Rights Agent for exercise or transfer, the certificate contained in the
     form of assignment or the form of election to purchase set forth on the
     reverse thereof, as the case may be, has not been completed to certify the
     holder is not an Acquiring Person (or an Affiliate or Associate thereof),
     the Rights Agent shall not take any further action with respect to such
     requested exercise or transfer without first consulting with the Company.

          (k)   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.

          (l)   The Rights Agent shall not be required to take notice or be
     deemed to have notice of any fact, event or determination (including,
     without limitation, any dates or events defined in this Agreement or the
     designation of any Person as an Acquiring Person, Affiliate or Associate)
     under this Agreement unless and until the rights Agent shall be
     specifically notified in writing by the Company of such fact, event or
     determination.

     Section 21.  CHANGE OF RIGHTS AGENT.  The Rights Agent or any 
successor Rights Agent may resign and be discharged from its duties 
under this Agreement upon 30 days' notice in writing mailed to the 
Company and to each transfer agent of the Common Stock by registered or 
certified 

                                       -47-

<PAGE>

mail, and, at the expense of the Company, to the holders of the Right 
Certificates by first-class mail.  The Company may remove the Rights 
Agent or any successor Rights Agent upon 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 by registered or 
certified mail, and to the holders of the Right Certificates by 
first-class mail.  If the Rights Agent shall resign or be removed or 
shall otherwise become incapable of acting, the Company shall appoint a 
successor to the Rights Agent. If the Company shall fail to make such 
appointment within a period of 30 days after giving notice of such 
removal or after it has been notified in writing of such resignation or 
incapacity by the resigning or incapacitated Rights Agent or by the 
holder of a Right Certificate (who shall, with such notice, submit his 
Right Certificate for inspection by the Company), then the registered 
holder of any Right Certificate may apply to any court of competent 
jurisdiction for the appointment of a new Rights Agent.  Any successor 
Rights Agent, whether appointed by the Company or by such a court shall 
be a corporation organized and doing business under the laws of the 
United States (or of any other state of the United States so long as 
such corporation is authorized to do business as a banking institution 
in such state), in good standing, which is authorized under such laws to 
exercise corporate trust or stock transfer powers and is subject to 
supervision or examination by federal or state authority and which has 
at the time of its appointment as Rights Agent a combined capital and 
surplus of at least $50 million.  After appointment, the successor 
Rights Agent shall be vested with the same powers, rights, duties and 
responsibilities as if it had been originally named as Rights Agent 
without further act or deed; but the predecessor Rights Agent shall 
deliver and transfer to the successor Rights Agent any property at the 
time held by it hereunder, and execute and deliver any further 
assurance, conveyance, act or deed necessary for the purpose.  Not later 
than the effective 

                                       -48-

<PAGE>

date of any such appointment, the Company shall file notice thereof in 
writing with the predecessor Rights Agent and each transfer agent of the 
Common Stock, and mail a notice thereof in writing to the registered 
holders of the Right Certificates.  Failure to give any notice provided 
for in this Section 21, however, or any defect therein, shall not affect 
the legality or validity of the resignation or removal of the Rights 
Agent or the appointment of the successor Rights Agent, as the case may 
be.

     Section 22.  ISSUANCE OF NEW RIGHT CERTIFICATES.  Notwithstanding 
any of the provisions of this Agreement or of the Rights to the 
contrary, the Company may, at its option, issue new Right Certificates 
evidencing Rights in such form as may be approved by its Board of 
Directors to reflect any adjustment or change in the Purchase Price and 
the number or kind or class of shares or other securities or property 
purchasable under the Right Certificates made in accordance with the 
provisions of this Agreement.  In addition, in connection with the 
issuance or sale of Common Stock following the Distribution Date and 
prior to the earlier of the Redemption Date and the Final Expiration 
Date, the Company may with respect to shares of Common Stock so issued 
or sold pursuant to (i) the exercise of stock options, (ii) under any 
employee plan or arrangement, (iii) upon the exercise, conversion or 
exchange of securities, notes or debentures issued by the Company or 
(iv) a contractual obligation of the Company in each case existing prior 
to the Distribution Date, issue Rights Certificates representing the 
appropriate number of Rights in connection with such issuance or sale.

     Section 23.  REDEMPTION.  (a) The Company may, at its option, by 
action of a majority of the Board of Directors (including, following a 
Section 11(a)(ii) Event, a Requisite Majority) at any time prior to the 
Close of Business on the earlier of (i) the 10th business day after the 
Stock Acquisition 

                                       -49-

<PAGE>

Date and (ii) the Final Expiration Date, redeem all but not less than 
all the then outstanding Rights at a redemption price of $0.01 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").  The 
redemption of the Rights by the Board of Directors of the Company may be 
made effective at such time, on such basis and with such conditions as 
the Board of Directors of the Company, in its sole discretion may 
establish.  The Company may, at its option, pay the Redemption Price in 
cash, shares of Common Stock (based on the current market price of the 
Common Stock at the time of redemption) or any other form of 
consideration deemed appropriate by the Board of Directors.

     (b)  Immediately upon the action of a majority of the Board of 
Directors of the Company (including, following a Section 11(a)(ii) 
Event, a Requisite Majority) ordering the redemption of the Rights 
pursuant to paragraph (a) of this Section 23 (or at such later time as 
the Board of Directors may establish for the effectiveness of such 
redemption), and without any further action and without any notice, the 
right to exercise the Rights will terminate and the only right 
thereafter of the holders of Rights shall be to receive the Redemption 
Price.  The Company shall promptly give public notice of any such 
redemption; PROVIDED, HOWEVER, that the failure to give, or any defect 
in, any such notice shall not affect the validity of such redemption.  
Within 10 days after such action of the Board of Directors of the 
Company ordering the redemption of the Rights, the Company shall mail a 
notice of redemption to all the holders of the then outstanding Rights 
at their last addresses as they appear upon the registry books of the 
Rights Agent or, prior to the Distribution Date, on the registry books 
of the transfer agent for the Common Stock.  Any notice which is mailed 
in the manner herein provided shall be deemed given, whether or not the 
holder receives the notice.  Each such notice of 

                                       -50-

<PAGE>

redemption will state the method by which the payment of the Redemption 
Price will be made.  Neither the Company nor any of its Affiliates or 
Associates may redeem, acquire or purchase for value any Rights at any 
time in any manner other than that specifically set forth in this 
Section 23 or in Section 24 hereof, and other than in connection with 
the purchase of Common Stock prior to the Distribution Date.

     Section 24.  EXCHANGE.  (a) The Board of Directors of the Company 
may, at its option, at any time after any Person first 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 11(a)(ii) hereof) for shares of 
Common Stock at an exchange ratio of one share of Common Stock per 
Right, appropriately adjusted to reflect any stock split, stock dividend 
or similar transaction occurring after the date hereof (such exchange 
ratio being hereinafter referred to as the "Exchange Ratio"). 
Notwithstanding the foregoing, the Board of Directors of the Company 
shall not be empowered to effect such exchange at any time after any 
Person (other than an Exempt Person), together with all Affiliates and 
Associates of such Person, becomes the Beneficial Owner of 50% or more 
of the Common Stock then outstanding.  From and after the occurrence of 
an event specified in Section 13(a) hereof, any Rights that theretofore 
have not been exchanged pursuant to this Section 24(a) shall thereafter 
be exercisable only in accordance with Section 13 and may not be 
exchanged pursuant to this Section 24(a).  The exchange of the Rights by 
the Board of Directors may be made effective at such time, on such basis 
and with such conditions as the Board of Directors in its sole 
discretion may establish.

     (b)  Immediately upon the action of the Board of Directors of the 
Company ordering the exchange of any Rights pursuant to paragraph (a) of 
this Section 24 and without any further action 

                                       -51-

<PAGE>

and without any notice, the right to exercise such Rights shall 
terminate and the only right thereafter of a holder of such Rights shall 
be to receive that number of shares of Common Stock equal to the number 
of such Rights hold by such holder multiplied by the Exchange Ratio.  
The Company shall promptly give public notice of any such exchange; 
PROVIDED, HOWEVER, that the failure to give, or any defect in, such 
notice shall not affect the validity of such exchange.  The Company 
promptly shall mail a notice of any such exchange to all of the holders 
of such Rights at their last addresses as they appear upon the registry 
books of the Rights Agent.  Any notice which is mailed in the manner 
herein provided shall be deemed given, whether or not the holder 
receives the notice.  Each such notice of exchange will state the method 
by which the exchange of the Common Stock for Rights will be effected 
and, in the event of any partial exchange, the number of Rights which 
will be exchanged.  Any partial exchange shall be effected pro rata 
based on the number of Rights (other than Rights which have become void 
pursuant to the provisions of Section 11(a)(ii) hereof) held by each 
holder of Rights.

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

     (d)  The Company shall not be required to issue fractions of a 
share of Common Stock or to distribute certificates which evidence 
fractional shares of Common Stock.  In lieu of such fractional shares of 
Common Stock, the Company shall pay to the registered holders of the 
Right Certificates with regard to which such shares of fractional Common 
Stock would otherwise be issuable an amount in cash equal to the same 
fraction of the current market value of a whole share 

                                       -52-

<PAGE>

of Common Stock.  For the purposes of this Section 24(d), 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 the second 
sentence of Section 11(d)(i) hereof) for the Trading Day immediately 
prior to the date of exchange pursuant to this Section 24.

     Section 25.  NOTICE OF CERTAIN EVENTS.  (a) In case the Company 
shall at any time after the earlier of the Distribution Date and the 
Stock Acquisition Date propose (i) to pay any dividend payable in stock 
of any class to the holders of its Common Stock or to make any other 
distribution to the holders of its Common Stock (other than a regular 
quarterly cash dividend), (ii) to offer to the holders of its Common 
Stock rights or warrants to subscribe for or to purchase any additional 
shares of Common Stock or shares of stock of any class or any other 
securities, rights or options, (iii) to effect any reclassification of 
its Common Stock (other than a reclassification involving only the 
subdivision or combination of outstanding Common Stock), (iv) to effect 
any consolidation or merger with or into, or to effect any sale or other 
transfer (or to permit one or more of its Subsidiaries to effect any 
sale or other transfer), in one or more transactions, of 50% or more of 
the assets or earning power of the Company and its Subsidiaries (taken 
as a whole) to, any other Person, (v) to effect the liquidation, 
dissolution or winding up of the Company, or (vi) to declare or pay any 
dividend on the Common Stock payable in Common Stock or to effect a 
subdivision, combination or consolidation of the Common Stock (by 
reclassification or otherwise than by payment of dividends in Common 
Stock), then, in each such case, the Company shall give to each holder 
of a Right 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, or distribution of rights or warrants, 
or the date on which such reclassification. consolidation, merger, sale, 
transfer, liquidation, 

                                       -53-

<PAGE>

dissolution, or winding up is to take place and the date of participation 
therein by the holders of the Common Stock, if any such date is to be fixed, 
and such notice shall be so given in the case of any action covered by clause 
(i) or (ii) above at least 10 days prior to the record date for determining 
holders of the Common Stock for purposes of such action, and in the case of 
any such other action, at least 10 days prior to the date of the taking of 
such proposed action or the date of participation therein by the holders of 
the Common Stock, whichever shall be the earlier.

     (b)  In case the event set forth in Section 11(a)(ii) or Section 13 
hereof shall occur, then the Company shall as soon as practicable thereafter 
give to each holder of a Right Certificate (or if occurring prior to the 
Distribution Date, the holders of the Common Stock), in accordance with 
Section 26 hereof, a notice of the occurrence of such event, which notice 
shall describe such event and the consequences of such event to holders of 
Rights under Section 11(a)(ii) or Section 13 hereof, as the case may be.

     Section 26.  NOTICES.  Notices or demands authorized by this Agreement 
to be given or made by the Rights Agent or by the holder of any Right 
Certificate to or on the Company shall be sufficiently given or made if sent 
by registered or certified mail and deemed given upon receipt, addressed 
(until another address is filed in writing with the Rights Agent) as follows:

                Pennaco Energy, Inc.
                1050 17th Street
                Suite 700
                Denver, Colorado  80265
                Attention:  Secretary

Subject to the provisions of Section 21 hereof, any notice or demand 
authorized by this Agreement to be given or made by the Company or by the 
holder of any Right Certificate to or on the Rights 

                                       -54-

<PAGE>

Agent shall be sufficiently given or made if sent by registered or certified 
mail and shall be deemed given upon receipt, addressed (until another address 
is filed in writing with the Company) as follows:

                Harris Trust and Savings Bank
                700 Louisiana
                Suite 3350
                Houston, Texas 77002
                Attention: Administrator

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

     Section 27.  SUPPLEMENTS AND AMENDMENTS.  Except as otherwise provided 
in this Section 27, for so long as the Rights are then redeemable, the 
Company may in its sole and absolute discretion, and the Rights Agent shall 
if the Company so directs, supplement or amend any provision of this 
Agreement in any respect without the approval of any holders of the Rights, 
including, without limitation, as long as the Rights are then redeemable, to 
extend the period during which the Rights may be redeemed.  At any time when 
the Rights are no longer redeemable, except as otherwise provided in this 
Section 27, the Company may, and the Rights Agent shall, if the Company so 
directs, supplement or amend this Agreement without the approval of any 
holders of Rights Certificates in order to (i) cure any ambiguity, (ii) 
correct or supplement any provision contained herein which may be defective 
or inconsistent with any other provisions herein, (iii) shorten or lengthen 
any time period hereunder, or (iv) change or supplement the provisions 
hereunder in any manner which the Company may deem necessary or desirable; 
PROVIDED that no such supplement or amendment shall adversely affect the 
interests of the holders of Rights as such (other than an 

                                       -55-

<PAGE>

Acquiring Person or an Affiliate or Associate of an Acquiring Person), and no 
such amendment may cause the rights again to become redeemable or cause the 
Agreement again to become amendable other than in accordance with this 
sentence.  Notwithstanding anything contained in this Agreement to the 
contrary, no supplement or amendment shall be made which decreases the 
Redemption Price.  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.  Notwithstanding anything in this 
Agreement to the contrary, no supplement or amendment that changes the rights 
and duties of the Rights Agent under this Agreement will be effective against 
the Rights Agent without the execution of such supplement or amendment by the 
Rights Agent.

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

     Section 29.  BENEFITS OF THIS AGREEMENT.  Nothing in this Agreement 
shall be construed to give to any Person other than the Company, the Rights 
Agent and the registered holders of the Right Certificates (and, prior to the 
Distribution Date, the Common Stock) any legal or equitable right, remedy or 
claim under this Agreement; but this Agreement shall be for the sole and 
exclusive benefit of the Company, the Rights Agent and the registered holders 
of the Right Certificates (and, prior to the Distribution Date, the Common 
Stock).

     Section 30.  DETERMINATION AND ACTIONS BY THE BOARD OF DIRECTORS.  The
Board of Directors of the Company shall have the exclusive power and authority
to administer this Agreement and to exercise the rights and powers specifically
granted to the Board of Directors of the Company or to 

                                       -56-

<PAGE>

the Company, or as may be necessary or advisable in the administration of 
this Agreement, including, without limitation, the right and power to (i) 
interpret the provisions of this Agreement and (ii) make all determinations 
deemed necessary or advisable for the administration of this Agreement 
(including, without limitation, a determination to redeem or not redeem the 
Rights or to amend this Agreement).  All such actions, calculations, 
interpretations and determinations (including, for purposes of clause (y) 
below, all omissions with respect to the foregoing) that are done or made by 
the Board of Directors of the Company in good faith, shall (x) be final, 
conclusive and binding on the Company, the Rights Agent, the holders of the 
Rights, as such, and all other parties, and (y) not subject the Board of 
Directors to any liability to the holders of the Rights.

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

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

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

                                       -57-

<PAGE>

     Section 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.


                                       -58-

<PAGE>

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


                                PENNACO ENERGY, INC.

                                By:  /s/ Paul M. Rady
                                     ----------------------------------------
                                     Paul M. Rady
                                     President and Chief Executive Officer



                                HARRIS TRUST AND SAVINGS BANK,
                                as Rights Agent

                                By:  /s/ Lorraine Rodewald
                                     ----------------------------------------
                                     Lorraine Rodewald
                                     Assistant Vice President 


                                       -59-

<PAGE>

                                      EXHIBIT A

                              Form of Right Certificate
Certificate No. R-                                             __________ Rights

     NOT EXERCISABLE AFTER MARCH 9, 2009 OR EARLIER IF REDEMPTION OR EXCHANGE
     OCCURS.  THE RIGHTS ARE SUBJECT TO REDEMPTION AT $0.01 PER RIGHT AND TO
     EXCHANGE ON THE TERMS SET FORTH IN THE RIGHTS AGREEMENT.



                                 Pennaco Energy, 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 February _____, 1999 (the 
"Rights Agreement"), between Pennaco Energy, Inc., a Nevada corporation (the 
"Company"), and Harris Trust and Savings Bank (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., Denver, 
Colorado time, on March 9, 2009 at the principal office of the Rights Agent, 
or at the office of its successor as Rights Agent, one-half of a fully paid, 
non-assessable share of Common Stock, par value $0.001 per share, of the 
Company (the "Common Stock") at a purchase price of $20 (subject to 
adjustment as provided in the Rights Agreement) per one-half of a share of 
Common Stock (the "Purchase Price"), upon presentation and surrender of this 
Right Certificate with the Form of Election to Purchase duly executed.  The 
number of Rights evidenced by this Right Certificate (and the number of 
one-half shares of Common Stock which may be purchased upon exercise hereof) 
set forth above, and the Purchase Price set forth above, are the number and 
Purchase Price as of March 9, 1999, based on the Common Stock as constituted 
at such date.  As provided in the Rights Agreement, the Purchase Price and 
the number of one-half shares of Common Stock which may be purchased upon the 
exercise of the Rights evidenced by this Right Certificate are subject to 
modification and adjustment upon the happening of certain events.

     This Right Certificate is subject to all of the terms, provisions and 
conditions of the 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 Right Certificates.  
Copies of the Rights Agreement are on file at the principal executive offices 
of the Company and the offices of the Rights Agent.

     This Right Certificate, with or without other Right Certificates, upon
surrender at the principal office of the Rights Agent, may be exchanged for
another Right Certificate or Right 

                                       A-1

<PAGE>

Certificates of like tenor and date evidencing Rights entitling the holder to 
purchase a like aggregate number of shares of Common Stock as the Rights 
evidenced by the Right Certificate or Right Certificates surrendered shall 
have entitled such holder to purchase.  If this Right Certificate shall be 
exercised in part, the holder shall be entitled to receive upon surrender 
hereof another Right Certificate or Right Certificates for the number of 
whole Rights not exercised.

     Subject to the provisions of the Rights Agreement, the Rights evidenced 
by this Right Certificate (i) may be redeemed by the Company at a redemption 
price of $0.01 per Right or (ii) may be exchanged in whole or in part for 
shares of the Company's Common Stock.

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

     This Right 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 as of ______________________________, _______.


                                       A-2

<PAGE>

                                  PENNACO ENERGY, INC.

ATTEST:

                                  By
- -------------------------------      -------------------------------
Name:                                Name:
Title:                               Title:



Countersigned:                    Harris Trust and Savings Bank, as Rights Agent



                                  By
                                     -------------------------------
                                     Name:
                                     Title:



                                       A-3

<PAGE>

                      FORM OF REVERSE SIDE OF RIGHT CERTIFICATE

                                 FORM OF ASSIGNMENT

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


     FOR VALUE RECEIVED _________________________________ hereby sells, assigns
and transfers onto
_______________________________________________________________________________
                    (Please print name and address of transferee)

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

Dated: _______________________, ______

                                       Signature _______________________________

     Signature Guaranteed:

     Signatures must be guaranteed by a member firm of a registered national 
securities exchange, a member of the National Association of Securities 
Dealers, Inc., or a commercial bank or trust company having an office or 
correspondent in the United States.

_______________________________________________________________________________

     The undersigned hereby certifies that the Rights evidenced by this Right 
Certificate are not beneficially owned by an Acquiring Person or an Affiliate 
or Associate thereof (as defined in the Rights Agreement).

                                       Signature ______________________________

_______________________________________________________________________________


                                       A-4

<PAGE>
                Form of Reverse Side of Right Certificate - continued

                             FORM OF ELECTION TO PURCHASE

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

To:  Pennaco Energy, Inc.

     The undersigned hereby irrevocably elects to exercise ____________ 
Rights represented by this Right Certificate to purchase the shares of Common 
Stock issuable upon the exercise of such Rights and requests that 
certificates for such shares of Common Stock be issued in the name of:

Please insert social security          ______________________       
or other identifying number            ______________________       
______________________                 ______________________       

                           (Please print name and address)

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

Please insert social security          ______________________        
or other identifying number            ______________________        
______________________                 ______________________        

                           (Please print name and address)

Dated: ________________, ______

                                       Signature ______________________________

Signature Guaranteed:

     Signatures must be guaranteed by a member firm of a registered national 
securities exchange, a member of the National Association of Securities 
Dealers, Inc., or a commercial bank or trust company having an office or 
correspondent in the United States.


                                       A-5

<PAGE>

               (Form of Reverse Side of Right Certificate -- continued)

_______________________________________________________________________________

     The undersigned hereby certifies that the Rights evidenced by this Right 
Certificate are not beneficially owned by an Acquiring Person or an Affiliate 
or Associate thereof (as defined in the Rights Agreement).

                                       Signature ______________________________

_______________________________________________________________________________



                                       A-6

<PAGE>

                                     NOTICE

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

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


                                       A-7


<PAGE>
 
                             [FACE OF CERTIFICATE]
        SPECIMEN                                                 SPECIMEN
      COMMON STOCK                                             COMMON STOCK
        NUMBER                   PENNACO ENERGY                   SHARES


INCORPORATED UNDER THE LAWS                             SEE REVERSE FOR CERTAIN
OF THE STATE OF NEVADA                                  DEFINITIONS AND
                                                        RESTRICTIONS

THIS CERTIFICATE IS TRANSFERABLE                        CUSIP  708046  10  7
  EITHER IN CHICAGO, IL OR
     IN NEW YORK, NY

THIS IS TO CERTIFY THAT    



IS THE OWNER OF

     FULLY PAID AND NON-ASSESSABLE SHARES OF THE COMMON STOCK OF THE PAR 
VALUE OF $.001 PER SHARE OF

                               PENNACO ENERGY, INC.

(the "Corporation") transferable on the books of the Corporation by the 
holder hereof in person or by duly authorized attorney upon surrender of this 
certificate properly endorsed.  This certificate is not valid until 
countersigned by the Transfer Agent and registered by the Registrar.

          WITNESS the facsimile seal of the Corporation and the facsimile 
signatures of its duly authorized officers.

Dated: 

                           [Pennaco Energy, Inc. Seal]
                                          
                                                                     
     SECRETARY                                          PRESIDENT AND CHIEF
                                                         EXECUTIVE OFFICER

COUNTERSIGNED AND REGISTERED:
        HARRIS TRUST AND SAVINGS BANK

                                        TRANSFER AGENT AND REGISTRAR,
BY
                                             AUTHORIZED SIGNATURE
<PAGE>

                             [REVERSE OF CERTIFICATE]

                               PENNACO ENERGY, INC.

This certificate also evidences and entitles the holder hereof to certain 
Rights as set forth in a Rights Agreement between Pennaco Energy, Inc. and 
Harris Trust and Savings Bank (the "Rights Agreement"), the terms of which 
are hereby incorporated herein by reference and a copy of which is on file at 
the principal executive offices of Pennaco Energy, Inc.  Under certain 
circumstances, as set forth in the Rights Agreement, such Rights may be 
redeemed or be evidenced by separate certificates and will no longer be 
evidenced by this certificate. Pennaco Energy, Inc. will mail to the holder 
of this certificate a copy of the Rights Agreement without charge after 
receipt of a written request therefor.  Under certain circumstances, as set 
forth in the Rights Agreement, Rights owned by or transferred to any Person 
who becomes an Acquiring Person or an Affiliate or Associate thereof (as such 
terms are defined in the Rights Agreement), and certain transferees thereof, 
will become null and void and will no longer be transferable.

The following abbreviations, when used in the inscription on the face of this 
certificate, shall be construed as though they were written out in full 
according to applicable laws or regulations:

<TABLE>
<S>         <C>                                 <C>
TEN COM  -  as tenants in common                 UNIF GIFT MIN ACT - ______ Custodian______
TEN ENT  -  as tenants by the entireties                            (Cust)          (Minor)
JT TEN   -  as joint tenants with right of               under Uniform Gifts to Minors
            survivorship and not as tenants              Act  _________________________
            in common                                                (State)
</TABLE>

     Additional abbreviations may also be used though not in the above list.

For value received, __________________ hereby sell, assign, and transfer unto
PLEASE INSERT SOCIAL SECURITY OR OTHER
IDENTIFYING NUMBER OF ASSIGNEE

______________________________________________________________________________
      PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING POSTAL 
                             ZIP CODE OF ASSIGNEE

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

_______________________________________________________________________ Shares

of the common stock represented by the within Certificate, and do hereby 
irrevocably constitute 

                                   -2-
<PAGE>

and appoint___________________________________________________________________

______________________________________________________________________________
Attorney to transfer the said stock on the books of the within-named Company 
with full power of substitution in the premises.

Dated,_________________

                                      X ______________________________________
                                                                   (SIGNATURE)

                                      X ______________________________________
                                                                   (SIGNATURE)

                                      NOTICE:  THE SIGNATURE(S) TO THE 
                                               ASSIGNMENT MUST CORRESPOND 
                                               WITH THE NAME(S) AS WRITTEN
                                               UPON THE FACE OF THIS CERTIFICATE
                                               IN EVERY PARTICULAR, WITHOUT 
                                               ALTERATION OR ENLARGEMENT OR 
                                               ANY CHANGE WHATEVER.



SIGNATURE(S) GUARANTEED BY:           _________________________________________
                                      THE SIGNATURE(S) MUST BE GUARANTEED BY 
                                      AN ELIGIBLE GUARANTOR INSTITUTION (BANKS,
                                      STOCKBROKERS, SAVINGS AND LOAN 
                                      ASSOCIATIONS AND CREDIT UNIONS WITH 
                                      MEMBERSHIP IN AN APPROVED SIGNATURE 
                                      GUARANTEE MEDALLION PROGRAM), PURSUANT 
                                      TO S.E.C. RULE 17Ad-15.

                                     -3-


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