NCI BUILDING SYSTEMS INC
8-K, 1998-07-09
PREFABRICATED METAL BUILDINGS & COMPONENTS
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<PAGE>   1





                       SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C.  20549

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

                                    FORM 8-K

                                 CURRENT REPORT
               PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
                              EXCHANGE ACT OF 1934

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

                                 JUNE 24, 1998
                                (Date of Report)

                           NCI BUILDING SYSTEMS, INC.
             (Exact name of registrant as specified in its charter)



    DELAWARE                     0-19885                       76-0127701
(State or other                (Commission                  (I.R.S. Employer
jurisdiction of               File Number)                Identification No.)
 incorporation)               


                                 7301 FAIRVIEW
                             HOUSTON, TEXAS  77041
                    (Address of principal executive offices)

                                 (713) 466-7788
                        (Registrant's telephone number,
                              including area code)
<PAGE>   2
         ITEM 5:          OTHER EVENTS

                          On June 24, 1998, the Board of Directors (the
"Board") of NCI Building Systems, Inc. (the "Company") declared a dividend of
one preferred stock purchase right ("Right") for each outstanding share of
common stock, $0.01 par value ("Common Stock"), of the Company.  The dividend
is payable on July 22, 1998 to stockholders of record at the close of business
on July 8, 1998 (the "Record Date").  Each Right entitles the registered holder
to purchase from the Company one one-hundredth (1/100th) of a share of the
Company's Series A Junior Participating Preferred Stock ("Series A Preferred
Stock") at a purchase price of $125.00, in each case after giving effect to and
taking into account a concurrent 2 for 1 split of the Common Stock of the
Company.  The terms and conditions of the Rights are set forth in that certain
Rights Agreement, dated June 24, 1998 by and between the Company and Harris
Trust and Savings Bank.

                          Initially the Rights will not be exercisable,
certificates for the Rights will not be issued and the Rights will automatically
trade with the Common Stock.  Until the Distribution Date (as hereinafter
defined) or the earlier redemption, exchange or expiration of the Rights, the
Rights will be represented by the Common Stock certificates and will be
transferred with, and only with, the Common Stock.  Until the Distribution Date
(or the earlier redemption, exchange or expiration of the Rights), all new
Common Stock certificates issued by the Company will contain a legend
incorporating the Rights Agreement by reference and the surrender for transfer
of any of the Company's Common Stock certificates, with or without the aforesaid
legend, will also constitute the simultaneous transfer of the Rights associated
with the Common Stock represented by such certificate.  As soon as practicable
following the Distribution Date, separate Right Certificates ("Rights
Certificates") will be mailed to holders of record of Common Stock at the close
of business on the Distribution Date, and, thereafter, the Right Certificates
alone will evidence the Rights, and the Rights will be transferable separate and
apart from the Common Stock.

                          The Distribution Date will occur on the (i)
fifteenth day following a public announcement that a person or group of
affiliated or associated persons, other than the Company, any subsidiary of the
Company or any employee benefit plan or employee stock plan of the Company
(each, an "Exempt Person"), has acquired, or has obtained the right to acquire,
beneficial ownership of 20% or more of the outstanding Common Stock other than
by reason of  an original issuance from the Company or as a result of
repurchases of shares by the Company (each, an "Acquiring Person") (the "Stock
Acquisition Date") or (ii) fifteenth business day following the commencement of
or public announcement of the intent by any Person other than an Exempt Person
to commence a tender or exchange offer which, if consummated, would result in
the ownership by such Person of 20% or more of the outstanding Common Stock,
irrespective of whether any shares of Common Stock are acquired pursuant to such
offer (such dates referenced in clauses (i) or (ii) above being called the
"Distribution Date").  The Rights Agreement provides that the Distribution Date
may be extended by the Continuing Directors (as hereinafter defined) prior to
the expiration of the time periods referenced in the preceding sentence.

                          A "Continuing Director" is a member of the Board who
either (i) is not an Acquiring Person or a person who is at the time engaged in
a tender or exchange offer that could result in that person's becoming the
beneficial owner of 20% or more of the outstanding Common Stock (or an affiliate
or an associate of either of the foregoing) and who was a member of the Board
before the time the Acquiring Person became an Acquiring Person or the tender or
exchange offer began or (ii) is not an Acquiring Person or a person who is at
the time engaged in a tender or exchange offer that could result in that
person's becoming the beneficial owner of 20% or more of the outstanding Common
Stock (or an affiliate or an associate of either of the foregoing) and was
recommended to serve on the Board by a majority of Continuing Directors.
<PAGE>   3
                          The Rights are not exercisable until the Distribution
Date.  The Rights will expire at the close of business on June 24, 2008, unless
redeemed or exchanged earlier as described below.

                          The Series A Preferred Stock will be nonredeemable
and, unless otherwise provided in connection with the creation of a subsequent
series of preferred stock, will be subordinate to all other series of the
Company's preferred stock.  The Series A Preferred Stock will not be issued
except upon exercise of Rights.  Each share of Series A Preferred Stock will be
entitled to receive, when, as and if declared, a quarterly dividend in an
amount equal to 100 times the quarterly cash dividend declared on the Company's
Common Stock.  In addition, the Series A Preferred Stock is entitled to 100
times any noncash dividends declared on the Common Stock, in like kind.  In the
event of dissolution, liquidation or winding-up of the Company, the holders of
Series A Preferred Stock will be entitled to receive a liquidation payment in
an amount equal to  $100 per share, plus 100 times the liquidation payment made
per share of Common Stock.  Each share of Series A Preferred Stock will have
100 votes, voting together with the Common Stock.  In the event of any merger,
consolidation or other transaction in which common shares are exchanged, each
share of Series A Preferred Stock will be entitled to receive 100 times the
amount received per share of Common Stock.  The rights of the Series A
Preferred Stock as to dividends, liquidation payments and voting rights are
protected by antidilution provisions.

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

                          If any person (other than an Exempt Person) becomes
an Acquiring Person, each holder of a Right, other than the Acquiring Person,
will have the right to receive, upon payment of the Purchase Price, in lieu of
Series A Preferred Stock, a number of shares of Common Stock having a market
value equal to twice the Purchase Price.  In lieu of issuing shares of Common
Stock upon exercise of Rights, the Company may, and to the extent that
insufficient shares of Common Stock are available for the exercise in full of
the Rights, the Company shall, issue cash, property or other securities of the
Company, or any combination thereof (which may be accompanied by a reduction in
the Purchase Price) in proportion determined by the Company, so that the
aggregate value received is equal to twice the Purchase Price.  Although the
Rights Agreement contains an exemption from the definition of an Acquiring
Person for any person to whom or which the Company directly issues shares of
Common Stock (for example, in a private placement or an acquisition by the
Company in which Common Stock is used as consideration), even if that person
thereby would become the beneficial owner of 20% or more of the Common Stock,
such person may nonetheless become an Acquiring Person thereafter if such
person acquires any additional shares of Common Stock.  Notwithstanding the
foregoing, after the acquisition of shares of Common Stock as described in this
paragraph, Rights that are (or, under certain circumstances, Rights that were)
beneficially owned by an Acquiring Person will be null and void.





                                       2
<PAGE>   4
                          The Board may, at its option, at any time after a
person becomes an Acquiring Person, exchange all or part of the then
outstanding and exercisable Rights for shares of Common Stock at an exchange
ratio of one share of Common Stock per Right; provided, however, the Board may
not effect such exchange after the time that any Person becomes the beneficial
owner of 50% or more of the Common Stock then outstanding.

                          If, after the Stock Acquisition Date, the Company is
acquired in a merger or other business combination (in which any shares of the
Common Stock are changed into or exchanged for other securities or assets) or
more than 50% of the assets or earnings power of the Company and its
subsidiaries (taken as a whole) are sold or transferred in one or a series of
related transactions, the Rights Agreement provides that proper provision shall
be made so that each holder of record of a Right (unless the Rights have been
earlier redeemed) will from and after that time have the right to receive, upon
payment of the Purchase Price, that number of shares of common stock of the
acquiring company which has a market value at the time of such transaction equal
to twice the Purchase Price.

                          At any time after the date of the Rights Agreement
until the time that a person becomes an Acquiring Person, the Continuing
Directors may redeem the Rights in whole, but not in part, at a price of $0.01
per Right (the "Redemption Price"), which may (at the option of the Company) be
paid in cash, shares of Common Stock or other consideration deemed appropriate
by the Continuing Directors.  Upon the effectiveness of any action of the Board
ordering redemption of the Rights, the Rights will terminate and the only right
of the holders of Rights will be to receive the Redemption Price.

                          The provisions of the Rights Agreement may be amended
by the Company, except that any amendment adopted after the time that a person
becomes an Acquiring Person may not adversely affect the interests of holders
of Rights.

                          The Rights have certain anti-takeover effects.  The
Rights will cause substantial dilution to a person or group that attempts to
acquire the Company without conditioning the offer on the Rights being redeemed
or a substantial number of Rights being acquired, and under certain
circumstances the Rights beneficially owned by such a person or group may
become void.  The Rights should not interfere with any merger or other business
combination approved by the Board because, if the Rights would become
exercisable as a result of such merger or business combination, the Board at
its option (and with the concurrence of a majority of the Continuing Directors)
may at any time prior to the time that any Person becomes an Acquiring Person
redeem all (but not less than all) of the then outstanding Rights at the
Redemption Price.

         ITEM 7:          FINANCIAL STATEMENTS AND EXHIBITS

         (a)     Exhibits.  The following exhibits are filed herewith:

                 10.1     Rights Agreement, dated June 24, 1998, by and between
                          the Company and Harris Trust and Savings Bank

                 99       Press Release issued by the Company





                                       3
<PAGE>   5
                                   SIGNATURES

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



                                  NCI BUILDING SYSTEMS, INC.
                                          (Registrant)
                                  
                                  
                                  
                                  By: /s/ ROBERT J. MEDLOCK
                                     ------------------------------------------
                                        Robert J. Medlock, Vice President and
                                        Chief Financial Officer
                                  
                                  Dated: July 9, 1998





                                       4
<PAGE>   6
                               INDEX TO EXHIBITS

<TABLE>
<CAPTION>
EXHIBIT
NUMBER                             EXHIBIT
- -------                            -------
<S>            <C>
 10.1          Rights Agreement, dated June 24, 1998.

 99            Press Release
</TABLE>

<PAGE>   1
                                RIGHTS AGREEMENT



                                     between



                           NCI BUILDING SYSTEMS, INC.



                                       and



                         HARRIS TRUST AND SAVINGS BANK,

                                  Rights Agent












                            Dated as of June 24, 1998




<PAGE>   2



                                TABLE OF CONTENTS


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

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

Section 3.        Issue of Right Certificates.....................................................................5

Section 4.        Form of Right Certificates......................................................................6

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

Section 6.        Transfer, Split Up, Combination, and Exchange of Right Certificates;
                  Mutilated, Destroyed, Lost, or Stolen Right Certificates........................................8

Section 7.        Exercise of Rights; Purchase Price; Expiration Date of Rights...................................9

Section 8.        Cancellation and Destruction of Right Certificates.............................................10

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

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

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

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

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

Section 14.       Fractional Rights and Fractional Shares........................................................22

Section 15.       Rights of Action...............................................................................23

Section 16.       Agreement of Rights Holders....................................................................23

Section 17.       Right Certificate Holder Not Deemed a Stockholder..............................................24

Section 18.       Concerning the Rights Agent....................................................................24

Section 19.       Merger or Consolidation or Change of Name of Rights Agent......................................25
</TABLE>

                                       -i-

<PAGE>   3

<TABLE>
<S>               <C>                                                                                            <C>
Section 20.       Duties of Rights Agent.........................................................................25

Section 21.       Change of Rights Agent.........................................................................28

Section 22.       Issuance of New Right Certificates.............................................................28

Section 23.       Redemption and Termination; Exchange...........................................................29

Section 24.       Notice of Certain Events.......................................................................31

Section 25.       Notices........................................................................................32

Section 26.       Supplements and Amendments.....................................................................33

Section 27.       Successors.....................................................................................33

Section 28.       Determinations and Actions by the Board of Directors, etc......................................33

Section 29.       Benefits of this Agreement.....................................................................34

Section 30.       Severability...................................................................................34

Section 31.       Governing Law..................................................................................34

Section 32.       Counterparts...................................................................................34

Section 33.       Descriptive Headings...........................................................................34


Exhibit A         Certificate of Designation of Series A Junior Participating Preferred Stock

Exhibit B         Form of Right Certificate
</TABLE>

                                      -ii-

<PAGE>   4



                                RIGHTS AGREEMENT

         THIS RIGHTS AGREEMENT (this "Agreement"), dated as of June 24, 1998, is
by and between NCI Building Systems, Inc., a Delaware corporation (the
"Company"), and Harris Trust and Savings Bank, an Illinois banking corporation
(the "Rights Agent").

         The Board of Directors of the Company has authorized and declared a
distribution of one Right (as defined below) for each share of Common Stock, par
value $0.01, of the Company (the "Common Stock") outstanding at the close of
business on the Record Date (as defined below) and, in connection with that
declaration, has authorized the issuance of one Right for each share of Common
Stock of the Company issued between the Record Date and the Distribution Date
(as defined below).

         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 that, together
         with all Affiliates and Associates of such Person, is the Beneficial
         Owner of 20% or more of the voting power of the capital stock of the
         Company then outstanding, but shall not include the Company, any
         Subsidiary, any employee benefit plan of the Company or of any
         Subsidiary, or any Person organized, appointed or established by the
         Company or any Subsidiary for or pursuant to the terms of any such
         plan.

                Notwithstanding the foregoing, no Person shall become an
         "Acquiring Person" as the result of (a) an acquisition of shares of
         capital stock of the Company by the Company which, by reducing the
         number of shares outstanding, increases the proportionate number of
         shares beneficially owned by such Person to 20% or more of the voting
         power of the capital stock of the Company then outstanding or (b) the
         acquisition by such Person of newly issued shares of capital stock
         directly from the Company (it being understood that a purchase from an
         underwriter or other intermediary is not directly from the Company);
         provided, however, that if a Person shall become the Beneficial Owner
         of 20% or more of the voting power of the capital stock of the Company
         then outstanding by reason of share purchases by the Company or the
         receipt of newly issued shares of capital stock directly from the
         Company and shall, after such share purchases or direct issuance by the
         Company, become the Beneficial Owner of any additional shares of
         capital stock of the Company, then such Person shall be deemed to be an
         "Acquiring Person"; provided further, however, that any transferee from
         such Person who becomes the Beneficial Owner of 20% or more of the
         voting power of the capital stock of the Company then outstanding shall
         nevertheless be deemed to be an "Acquiring Person." Notwithstanding the
         foregoing, if the Board of Directors of the




<PAGE>   5



         Company determines in good faith that a Person who would otherwise be
         an "Acquiring Person," as defined pursuant to the foregoing provisions
         of this paragraph, has become such inadvertently, and such Person
         divests as promptly as practicable (and in any event within ten
         business days after notification by the Company) a sufficient number of
         shares of capital stock so that such Person would no longer be an
         Acquiring Person, as defined pursuant to the foregoing provisions of
         this paragraph, then such Person shall not be deemed to be an
         "Acquiring Person" for any purposes of this Agreement. The word
         "outstanding," when used with reference to a Person's Beneficial
         Ownership of shares of capital stock of the Company, shall mean the
         number of such shares then issued and outstanding together with the
         number of such shares not then issued and outstanding which such Person
         would be deemed to own beneficially hereunder.

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

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

                         (i)     that such Person or any of such Person's
                  Affiliates or Associates, directly or indirectly, has (A) the
                  right to acquire (whether such right is exercisable
                  immediately or only after the passage of time) pursuant to any
                  agreement, arrangement or understanding (whether or not in
                  writing) or upon the exercise of conversion rights, exchange
                  rights, rights (other than the Rights at any time before the
                  occurrence of a Triggering Event but thereafter including
                  Rights), warrants or options, or otherwise; provided, however,
                  that a Person shall not be deemed the "Beneficial Owner" of,
                  or to "beneficially own," securities tendered pursuant to a
                  tender or exchange offer made by such Person or any of such
                  Person's Affiliates or Associates until such tendered
                  securities are accepted for purchase or exchange; or (B) the
                  right to vote or dispose of or "beneficial ownership" (as
                  determined pursuant to Rule 13d-3 of the General Rules and
                  Regulations under the Exchange Act) of (including pursuant to
                  any agreement, arrangement or understanding, whether or not in
                  writing); provided, however, that a Person shall not be deemed
                  the "Beneficial Owner" of, or to "beneficially own," any
                  security under this clause (B) as a result of an agreement,
                  arrangement or understanding to vote such security if such
                  agreement, arrangement or understanding (1) arises solely from
                  a revocable proxy given in response to a public proxy or
                  consent solicitation made pursuant to, and in accordance with,
                  the applicable provisions of the General Rules and Regulations
                  under the Exchange Act, and (2) does not result in ownership
                  required to be reported by such Person on Schedule 13D under
                  the Exchange Act (or any comparable or successor report); or


                                        2

<PAGE>   6



                         (ii)    that are beneficially owned, by any other
                  Person (or any Affiliate or Associate thereof) with which such
                  Person or any of such Person's Affiliates or Associates has
                  any agreement, arrangement, or understanding (whether or not
                  in writing), for the purpose of acquiring, holding, voting
                  (except pursuant to a revocable proxy as described in the
                  proviso to Section 1(c)(i)(B)), or disposing of any securities
                  or equity interests;

         provided, however, that nothing in this paragraph (c) shall cause a
         Person engaged in business as an underwriter of securities to be the
         "Beneficial Owner" of, or to "beneficially own," any securities
         acquired through such Person's participation in good faith in a firm
         commitment underwriting until the expiration of 40 days after the date
         of such acquisition.

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

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

                (f)      "Common Stock" shall mean the Common Stock, $0.01 par
         value, of the Company, except that "common stock" when used with
         reference to any Person other than the Company shall mean the class of
         capital stock of such Person with the greatest voting power, or the
         equity securities or other equity interests having power to control or
         direct the management, of such Person.

                (g)      "Continuing Director" shall mean any member of the 
         Board of Directors of the Company who (i) (A) is not an Acquiring
         Person or a Person who is at the time engaged in a tender or exchange
         offer that could result in that Person's becoming the Beneficial Owner
         of 20% or more of the outstanding Common Stock, or an Affiliate or an
         Associate of either of the foregoing, and (B) who was a member of the
         Board of Directors of the Company before the time the Acquiring Person
         became an Acquiring Person or the tender or exchange offer began or
         (ii)(A) is not an Acquiring Person or a Person who is at the time
         engaged in a tender or exchange offer that could result in that
         Person's becoming the Beneficial Owner of 20% or more of the
         outstanding Common Stock, or an Affiliate or an Associate of either of
         the foregoing, and (B) was recommended to serve on the Board of
         Directors of the Company by a majority of Continuing Directors.

                (h)      "Distribution Date" shall have the meaning given it in
         Section 3(a) hereof.

                (i)      "Expiration Date" shall have the meaning given it in
         Section 7 hereof.



                                        3

<PAGE>   7



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

                (k)      "Preferred Stock" shall mean the Series A Junior
         Participating Preferred Stock, $1.00 par value, of the Company having
         the designations, preferences, rights, qualifications, limitations, and
         restrictions set forth in Exhibit A hereto.

                (l)      "Record Date" shall mean July 8, 1998.

                (m)      "Right" shall mean the right to purchase one 
         one-hundredth of a share of Series A Junior Participating Preferred
         Stock, par value $1.00, of the Company, or other securities or
         property, upon the terms and subject to the conditions hereinafter set
         forth.

                (n)      "Right Certificates" shall mean certificates
         substantially in the form of Exhibit B hereto, evidencing the rights or
         any other form of certificate evidencing the Rights, which form is
         adopted pursuant to this Agreement.

                (o)      "Stock Acquisition Date" shall mean the first date of
         public announcement (which, for purposes of this definition, shall
         include a report filed pursuant to Section 13(d) of the Exchange Act)
         by the Company or an Acquiring Person that an Acquiring Person has
         become such.

                (p)      "Subsidiary" shall mean any corporation or other entity
         of which a majority of any class of equity securities or of any equity
         interests is beneficially owned by the Company or a Subsidiary of the
         Company, or that is otherwise controlled by the Company or a Subsidiary
         of the Company, and "subsidiary," with reference to any other Person,
         shall mean any corporation or other entity of which a majority of any
         class of equity securities or of any equity interests is beneficially
         owned by such other Person, or which is otherwise controlled by such
         other Person.

                (q)      "Triggering Event" shall mean any event described in
         Section 11(a)(ii) or Section 13(a) 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 before 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.


                                        4

<PAGE>   8



         Section 3. Issue of Right Certificates.

                (a)      Until the earlier of (i) the close of business on the
         fifteenth day (subject to extension by the Board of Directors as
         provided below) after the Stock Acquisition Date, or (ii) the close of
         business on the fifteenth day (subject to extension by the Board of
         Directors as provided below) after the commencement of, or first public
         announcement of the intent to commence, a tender or exchange offer by
         any Person (other than the Company, any Subsidiary, any employee
         benefit plan of the Company or of any Subsidiary, or any Person
         organized, appointed, or established by the Company or any Subsidiary
         for or pursuant to the terms of any such plan), if upon consummation
         thereof, such Person would be the Beneficial Owner of 20% or more of
         the shares of Common Stock then outstanding (the earlier of such dates,
         after any extensions, being herein referred to as the "Distribution
         Date"), (A) the Rights will be evidenced (subject to the provisions of
         paragraph (b) of this Section 3) by the certificates for the Common
         Stock registered in the names of the holders of the Common Stock (which
         certificates for Common Stock shall be deemed also to be certificates
         for Rights) and not by separate certificates, and (B) the Rights will
         be transferable only in connection with the transfer of the underlying
         shares of Common Stock (including a transfer to the Company). The
         fifteen-day periods referred to in clauses (i) and (ii) of the
         preceding sentence may be extended by the Board of Directors, provided
         that no such extension may be made when a majority of the directors in
         office are not Continuing Directors, and any such extension shall
         expire immediately when a majority of the directors in office are not
         Continuing Directors. As soon as practicable after the Distribution
         Date, the Rights Agent will send, at the expense of the Company, by
         first-class, postage-prepaid mail, to each record holder of the Common
         Stock as of the close of business on the Distribution Date, at the
         address of such holder shown on the records of the Company, one or more
         Right Certificates evidencing one Right for each share of Common Stock
         so held, subject to adjustment as provided herein. As of and after the
         Distribution Date, the Rights will be evidenced solely by such Right
         Certificates.

                (b)      As promptly as practicable following the Record Date,
         the Company will send a copy of a summary of the Rights to each record
         holder of the Common Stock as of the close of business on the Record
         Date, at the address of such holder shown on the records of the
         Company. With respect to certificates for the Common Stock outstanding
         as of the Record Date, until the Distribution Date, the Rights will be
         evidenced by such certificates for the Common Stock and the registered
         holders of the Common Stock shall also be the registered holders of the
         associated Rights. Until the earlier of the Distribution Date or the
         Expiration Date, the transfer of any certificates representing shares
         of Common Stock in respect of which Rights have been issued shall also
         constitute the transfer of the Rights associated with such shares of
         Common Stock.

                (c)      Rights shall be issued in respect of all shares of
         Common Stock issued on or after the Record Date but before the earlier
         of the Distribution Date or the Expiration Date. Common Stock
         certificates issued on or after the Record Date but before the earlier
         of the


                                        5

<PAGE>   9



         Distribution Date or the Expiration Date upon the transfer or new
         issuance of shares of Common Stock shall also be deemed to be
         certificates for Rights, and shall bear the following legend:

                This certificate also evidences and entitles the holder hereof
                to certain Rights as set forth in the Rights Agreement between
                the Corporation and Harris Trust and Savings Bank, dated as of
                June 24, 1998 (the "Rights Agreement"), the terms of which are
                incorporated herein and a copy of which is on file at the
                principal offices of the Corporation. Under certain
                circumstances, as set forth in the Rights Agreement, such Rights
                will be evidenced by separate certificates and will no longer be
                evidenced by this certificate. Promptly after receipt of a
                written request therefor, the Corporation will mail or cause to
                be mailed to the holder of this certificate a copy of the Rights
                Agreement without charge. Under certain circumstances, Rights
                issued to, or held by, Acquiring Persons or Affiliates or
                Associates thereof (as such terms are defined in the Rights
                Agreement) and any subsequent holder of such Rights may become
                null and void.

                With respect to such certificates containing the foregoing
         legend, until the earlier of (i) the Distribution Date or (ii) the
         Expiration Date, the Rights associated with the Common Stock
         represented by such certificates shall be evidenced by such
         certificates alone and registered holders of Common Stock shall also be
         the registered holders of the associated Rights, and the transfer of
         any of such certificates shall also constitute the transfer of the
         Rights associated with the Common Stock represented by such
         certificates.

         Section 4. Form of Right Certificates.

                (a)      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 each be substantially in the form set forth in
         Exhibit B hereto and may have marks of identification or designation
         and such legends, summaries, or endorsements printed thereon that the
         Company may deem appropriate and that are not inconsistent with the
         provisions of this Agreement, or as may be required to comply with any
         applicable law or with any rule or regulation made pursuant thereto or
         with any rule or regulation of any stock exchange on which the Rights
         may from time to time be listed, or to conform to usage. Subject to the
         provisions of Section 11 and Section 22 hereof, the Right Certificates,
         whenever distributed, shall be dated as of the Distribution Date and on
         their face shall entitle the holders thereof to purchase the number of
         shares of Preferred Stock set forth therein at the Purchase Price (as
         such term is defined in Section 7), but the number of shares
         purchasable upon the exercise of each Right and the Purchase Price
         thereof shall be subject to adjustment as provided herein.



                                        6

<PAGE>   10



                (b)      Any Right Certificate that represents Rights
         beneficially owned by: (i) an Acquiring Person or any Associate or
         Affiliate of an Acquiring Person, (ii) a transferee of an Acquiring
         Person (or such Associate or Affiliate) who becomes a transferee after
         the Acquiring Person becomes such, or (iii) a transferee of an
         Acquiring Person (or such Associate or Affiliate) who becomes a
         transferee before or at the same time the Acquiring Person becomes such
         and receives such Rights pursuant to either (A) a transfer (whether or
         not for consideration) from the Acquiring Person to holders of equity
         interest in such Acquiring Person or to any Person with whom the
         Acquiring Person has any continuing agreement, arrangement, or
         understanding regarding the transferred Rights or (B) a transfer that
         is part of a plan, arrangement, or understanding that has as a primary
         purpose or effect avoidance of Section 7(e) hereof, and any Right
         Certificate issued upon transfer, exchange, replacement, or adjustment
         of any other Right Certificate referred to in this sentence, shall
         contain (to the extent feasible) the following legend:

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

         Section 5. Countersignature and Registration.

                (a)      The Right Certificates shall be executed on behalf of
         the Company by its Chairman of the Board, its President, or any Vice
         President, either manually or by facsimile signature, and shall have
         affixed thereto the Company's seal or a facsimile thereof, which shall
         be attested by the Secretary or an Assistant Secretary of the Company,
         either manually or by facsimile signature. The Right Certificates shall
         be manually countersigned by the Rights Agent and shall not be valid
         for any purpose unless so countersigned. In case any officer of the
         Company who has signed any of the Right Certificates ceases to be such
         officer of the Company before countersignature by the Rights Agent and
         issuance and delivery by the Company, such Right Certificates,
         nevertheless, may be countersigned by the Rights Agent and issued and
         delivered by the Company with the same force and effect as though the
         person who signed such Right Certificates had not ceased to be such
         officer of the Company; and any Right Certificate may be signed on
         behalf of the Company by any person who, at the actual date of the
         execution of such Right Certificate, shall be a proper officer of the
         Company to sign such Right Certificate, although at the date of the
         execution of this 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 the office designated by the Rights Agent
         as the appropriate place for surrender of Right Certificates upon
         exercise or transfer, books for registration and transfer of the Right


                                        7

<PAGE>   11



         Certificates issued hereunder. Such books shall show the names and
         addresses of the holders of the Right Certificates, the number of
         Rights evidenced on the face of each of the Right Certificates, and the
         date of each of the Right Certificates.

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

                (a)      Subject to the provisions of Section 4(b), Section 
         7(e), and Section 14 hereof, at any time after the close of business on
         the Distribution Date and until the close of business on the Expiration
         Date, any Right Certificate may be transferred, split up, combined, or
         exchanged for another Right Certificate or Certificates, entitling the
         registered holder to purchase a like number of shares of Preferred
         Stock (or, following a Triggering Event, other securities or property,
         as the case may be) as the Right Certificate or Certificates
         surrendered then entitled such holder (or former holder in the case of
         a transfer) to purchase. Any registered holder desiring to transfer,
         split up, combine, or exchange any Right Certificate shall make such
         request in writing delivered to the Rights Agent, and shall surrender
         the Right Certificate to be transferred, split up, combined, or
         exchanged at the office of the Rights Agent designated for such
         purpose. Neither the Rights Agent nor the Company shall be obligated to
         take any action whatsoever with respect to the transfer of any such
         surrendered Right Certificate until the registered holder shall have
         completed and signed the certificate contained in the form of
         assignment set forth on the reverse side of each such Right Certificate
         and shall have provided such additional evidence of the identity of the
         Beneficial Owner (or former Beneficial Owner) or Affiliates or
         Associates thereof as the Company shall reasonably request. Thereupon
         the Rights Agent shall, subject to Section 4(b) and Section 7(e)
         hereof, 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)      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 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 execute and deliver a new Right Certificate
         of like tenor (except for the issuance date thereof) to the Rights
         Agent for countersignature and delivery to the registered owner in lieu
         of the Right Certificate so lost, stolen, destroyed, or mutilated.



                                        8

<PAGE>   12



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

                (a)      Subject to Section 7(e) hereof, the registered holder
         of any Right Certificate may exercise the Rights evidenced thereby
         (except as otherwise provided herein including the restrictions on
         exercisability set forth in Section 9(c), Section 11(a)(iii), and
         Section 23(a) hereof) 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 set forth on the reverse side thereof and
         the certificate contained therein duly executed, to the Rights Agent at
         the office of the Rights Agent designated for such purpose, together
         with payment of the Purchase Price with respect to each surrendered
         Right for the total number of shares (or other securities or property,
         as the case may be) as to which such surrendered Rights are
         exercisable, at or before the earlier of (i) the close of business on
         June 24, 2008 (the "Final Expiration Date"), or (ii) the time at which
         the Rights are redeemed as provided in Section 23 hereof (such earlier
         time being herein referred to as the "Expiration Date").

                (b)      The purchase price for each one one-hundredth of a
         share of Preferred Stock pursuant to the exercise of a Right (the
         "Purchase Price") shall initially be $125, and shall be subject to
         adjustment from time to time as provided in Section 11 hereof and shall
         be payable in lawful money of the United States of America in
         accordance with paragraph (c) below.

                (c)      Upon receipt of a Right Certificate representing
         exercisable Rights, with the form of election to purchase set forth on
         the reverse side thereof and the certificate contained therein duly
         executed, accompanied by payment, with respect to each Right so
         exercised (by certified bank check or bank draft payable to the order
         of the Rights Agent), of the Purchase Price for the shares of Preferred
         Stock (or other securities or property, as the case may be) to be
         purchased and an amount equal to any applicable transfer tax, the
         Rights Agent shall, subject to Section 20(k) hereof, promptly (i) (A)
         requisition from any transfer agent of the shares of Preferred Stock
         (or make available, if the Rights Agent is the transfer agent for the
         Preferred Stock) certificates for the number of shares of Preferred
         Stock to be purchased and the Company hereby irrevocably authorizes its
         transfer agent to comply with all such requests or (B) requisition from
         the depositary agent depositary receipts representing the number of one
         one-hundredths of a share of Preferred Stock being purchased (in which
         case certificates for the shares of Preferred Stock represented by such
         receipts shall be deposited by the transfer agent with the depositary
         agent) and the Company hereby directs the depositary agent to comply
         with such request, (ii) requisition from the Company the amount of
         cash, if any, to be paid in lieu of fractional shares of Preferred
         Stock in accordance with Section 14 hereof, (iii) after receipt of such
         certificates for shares of Preferred Stock, cause the same to be
         delivered to or upon the order of the registered holder of such Right
         Certificate, registered in the name or names designated by such holder,
         and (iv) after receipt thereof, deliver such cash, if any, to or upon
         the order of the registered holder of such Right Certificate. All funds
         received by the Rights Agent pursuant to the exercise of Rights shall
         be held in trust for the benefit of the Company and paid over to the
         Company on demand. If the Company is obligated to issue other
         securities of the Company, pay cash, or distribute


                                        9

<PAGE>   13



         other property pursuant to Section 11(a) hereof, the Company will make
         all arrangements necessary so that such other securities, cash, or
         other property is available for distribution by the Rights Agent, if
         and when appropriate.

                (d)      If the registered holder of any Right Certificate
         exercises less than all the Rights evidenced thereby, a new Right
         Certificate evidencing the Rights remaining unexercised shall be issued
         by the Rights Agent and 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, subject to the provisions of
         Section 14 hereof.

                (e)      Notwithstanding anything in this Agreement to the
         contrary, from and after the occurrence of a Triggering Event, any
         Rights beneficially owned by (i) an Acquiring Person or an Associate or
         Affiliate of an Acquiring Person, (ii) a transferee of an Acquiring
         Person (or such Associate or Affiliate) who becomes a transferee after
         the Acquiring Person becomes such, or (iii) a transferee of an
         Acquiring Person (or such Associate or Affiliate) who becomes a
         transferee before or at the same time the Acquiring Person becomes such
         and receives such Rights pursuant to either (A) a transfer (whether or
         not for consideration) from the Acquiring Person to holders of equity
         interests in such Acquiring Person or to any Person with whom the
         Acquiring Person has any continuing agreement, arrangement, or
         understanding regarding the transferred Rights or (B) a transfer that
         is part of a plan, arrangement, or understanding that has as a primary
         purpose or effect the avoidance of this Section 7(e), shall become null
         and void without any further action, and any holder of such Rights
         shall thereupon have no rights whatsoever with respect to such Rights,
         whether under any provision of this Agreement or otherwise. The Company
         shall use all reasonable efforts to insure that the provisions of this
         Section 7(e) 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 determination with respect to an Acquiring Person or its
         Affiliates, Associates, or transferees hereunder.

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

         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 any of its
agents, be delivered to the Rights Agent for cancellation or in canceled form,
or, if surrendered to the Rights Agent, shall be canceled by it, and no Right
Certificates shall be issued in lieu thereof except as expressly permitted by
any of the provisions of


                                       10

<PAGE>   14



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

         Section 9. Reservation and Availability of Preferred Stock.

                (a)      The Company will cause to be reserved and kept
         available out of its authorized and unissued shares of Preferred Stock
         (and, following the occurrence of a Triggering Event, other securities)
         or any authorized and issued shares of Preferred Stock (and, following
         the occurrence of a Triggering Event, other securities) held in its
         treasury, the number of shares of Preferred Stock (and, following the
         occurrence of a Triggering Event, other securities) that, except as
         provided in Section 11(a)(iii) hereof, will be sufficient to permit the
         exercise in full of all outstanding Rights.

                (b)      If shares of Preferred Stock (and, following the
         occurrence of a Triggering Event, other securities issuable and
         deliverable upon the exercise of the Rights) are listed on any national
         securities exchange, the Company shall use its best efforts to cause,
         from and after the time the Rights become exercisable (but only to the
         extent that it is reasonably likely that the Rights will be exercised),
         all shares reserved for issuance upon the exercise of the Rights to be
         listed on such exchange upon official notice of issuance upon such
         exercise.

                (c)      The Company shall use its best efforts to (i) file, as
         soon as practicable following the first occurrence of a Triggering
         Event, a registration statement under the Securities Act of 1933, as
         amended (the "Securities Act"), with respect to the Preferred Stock or
         other securities purchasable upon exercise of the Rights on an
         appropriate form, (ii) cause such registration statement to become
         effective as soon as practicable after such filing, and (iii) cause
         such registration statement to remain effective (with a prospectus at
         all times meeting the requirements of the Securities Act) until the
         Expiration Date. The Company will also take such action as may be
         appropriate under the securities or "blue sky laws" of the various
         states. The Company may temporarily suspend, for a period of time not
         to exceed ninety (90) days, the exercisability of the Rights in order
         to prepare and file such registration statement. Upon any such
         suspension, the Company shall issue a public announcement stating that
         the exercisability of the Rights has been temporarily suspended.

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



                                       11

<PAGE>   15



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

         Section 10. Preferred Stock Record Date. Each person in whose name any
certificate for shares of Preferred Stock (or other securities, as the case may
be) is issued upon the exercise of Rights shall for all purposes be deemed to
have become the holder of record of the shares of Preferred Stock (or other
securities, as the case may be) represented thereby on, and such certificate
shall be dated, the date upon which the Right Certificate evidencing such Rights
was duly surrendered and payment of the Purchase Price (and all applicable
transfer taxes) was made; provided, however, that if the date of such surrender
and payment is a date upon which the Preferred Stock (or other securities, as
the case may be) transfer books of the Company are closed, such person shall be
deemed to have become the record holder of such shares on, and such certificate
shall be dated, the next succeeding Business Day on which the Preferred Stock
(or other securities, as the case may be) transfer books of the Company are
open. Before the exercise of the Rights evidenced thereby, the holder of a Right
Certificate shall not be entitled to any rights of a stockholder of the Company
with respect to shares for which the Rights shall be exercisable, including 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, and Kind of Shares,
or Number of Rights. The Purchase Price, the number and kind of shares covered
by each Right, and the number of Rights outstanding are subject to adjustment
from time to time as provided in this Section 11.

                  (a)    (i)  If the Company at any time after the date of this
                  Agreement (A) declares a dividend on the Preferred Stock
                  payable in shares of Preferred Stock, (B) subdivides the
                  outstanding Preferred Stock, (C) combines the outstanding
                  Preferred Stock into a smaller number of shares, or (D) issues
                  or authorizes the issuance of any shares of its capital stock
                  in a reclassification of the Preferred Stock (including any
                  such reclassification in connection with a consolidation or
                  merger in which the Company is the continuing or surviving
                  corporation), except as otherwise provided in this Section
                  11(a) and Section 7(e) hereof, the Purchase Price in effect at
                  the time of the record date for such dividend or of the
                  effective date of such


                                       12

<PAGE>   16



                  subdivision, combination, or reclassification, and the number
                  and kind of shares of Preferred Stock or capital stock, as the
                  case may be, issuable on such date, shall be proportionately
                  adjusted so that the holder of any Right exercised after such
                  time shall be entitled to receive the aggregate number and
                  kind of shares of Preferred Stock or capital stock, as the
                  case may be, which, if such Right had been exercised
                  immediately before such date and at a time when the Preferred
                  Stock (or other capital stock, as the case may be) transfer
                  books of the Company were open, he would have owned upon such
                  exercise and been entitled to receive by virtue of such
                  dividend, subdivision, combination, or reclassification. If an
                  event occurs that would require an adjustment under both this
                  Section 11(a)(i) and Section 11(a)(ii) hereof, the adjustment
                  provided for in this Section 11(a)(i) shall be in addition to,
                  and shall be made before, any adjustment required pursuant to
                  Section 11(a)(ii) hereof.

                         (ii)      If, at any time after the date of this
                  Agreement, any Person, alone or together with its Affiliates
                  or Associates, shall become an Acquiring Person, then proper
                  provision shall be made so that each holder of a Right (except
                  as provided below and in Section 7(e) hereof) shall thereafter
                  have the right to receive, upon exercise thereof at the
                  Purchase Price then current in accordance with the terms of
                  this Agreement, in lieu of the number of shares of Preferred
                  Stock for which a Right would otherwise be exercisable, a
                  number of shares of Common Stock of the Company equal to the
                  result obtained by (1) multiplying the Purchase Price then
                  current by the number of hundredths of a share of Preferred
                  Stock for which a Right was exercisable immediately before the
                  first occurrence of an event set forth in this Section
                  11(a)(ii), and dividing that product by (2) 50% of the current
                  market price (determined pursuant to Section 11(d) hereof) per
                  share of Common Stock on the date of such first occurrence
                  (the "Adjustment Shares").

                         (iii)     If there are not sufficient authorized but
                  unissued and treasury shares of Common Stock to permit the
                  exercise in full of the Rights in accordance with the
                  foregoing subparagraph (ii), the Company shall take all such
                  action as may be necessary to authorize additional shares of
                  Common Stock for issuance upon exercise of the Rights;
                  provided, however, if the Company is unable to cause the
                  authorization of a sufficient number of additional shares of
                  Common Stock, then, if the Rights become so exercisable, the
                  Company, with respect to each Right and to the extent
                  necessary and permitted by applicable law and any agreements
                  or instruments in effect on the Stock Acquisition Date to
                  which it is a party, shall, upon the exercise of any such
                  Right, make adequate provision to: (A) pay an amount in cash
                  equal to the excess of (1) the product of (a) the number of
                  Adjustment Shares, multiplied by (b) the current market price
                  (determined pursuant to Section 11(d) hereof) per share of the
                  Common Stock on the date of the first occurrence of an event
                  set forth in Section 11(a)(ii) above (such product is herein
                  called the "Current Value"), over (2) the Purchase Price, in
                  lieu of issuing shares of Common Stock and requiring payment
                  therefor; (B) issue debt or equity securities (other than
                  Common


                                       13

<PAGE>   17



                  Stock) having a value equal to the Current Value, where the
                  value of such securities shall be determined by an investment
                  banking firm selected by the Board of Directors of the
                  Company, and requiring the payment of the Purchase Price
                  therefor; (C) issue a number of shares, or units of shares, of
                  preference stock equal to the number of Adjustment Shares
                  where the Board of Directors of the Company shall have deemed
                  such shares or units to have the same value as the Common
                  Stock (a "Common Stock Equivalent"), and requiring the payment
                  of the Purchase Price; or (D) deliver any combination of cash,
                  property, preference stock, Common Stock Equivalents, or other
                  securities having the requisite value as determined by the
                  Board of Directors and requiring the payment of all or any
                  requisite portion of the Purchase Price; provided further,
                  however, if the Company shall not have made adequate provision
                  to deliver value pursuant to clause (A), (B), (C), or (D)
                  above within sixty (60) days following the date of the first
                  occurrence of the event listed in Section 11(a)(ii), then the
                  Company shall be obligated to deliver cash in accordance with
                  clause (A) above. To the extent that the Company determines
                  that some action need be taken pursuant to clause (A), (B),
                  (C), or (D) of the first proviso to the first sentence of this
                  Section 11(a)(iii), the Company may suspend the exercisability
                  of the Rights for a period of up to sixty (60) days (or ninety
                  (90) days if a registration statement pursuant to Section 9(c)
                  hereof is being filed and pursued) following the date on which
                  the event listed in Section 11(a)(ii) shall have occurred, in
                  order to decide the appropriate form of distribution to be
                  made pursuant to such first proviso and to determine the value
                  thereof. In the event of any such suspension, the Company
                  shall issue a public announcement stating that the
                  exercisability of the Rights has been temporarily suspended.

                  (b)    If the Company fixes a record date for the issuance of
         rights, options or warrants to all holders of Preferred Stock entitling
         them to subscribe for or purchase (for a period expiring within
         forty-five (45) calendar days after such record date) Preferred Stock
         or securities convertible into Preferred Stock at a price per share of
         Preferred Stock (or having a conversion price per share, if a security
         convertible into Preferred Stock) less than the current market price
         (as determined pursuant to Section 11(d) hereof) per share of Preferred
         Stock on such record date, the Purchase Price to be in effect after
         such record date shall be determined by multiplying the Purchase Price
         in effect immediately before such record date by a fraction, the
         numerator of which shall be the number of shares of Preferred Stock
         outstanding on such record date, plus the number of shares of Preferred
         Stock which the aggregate offering price of the total number of shares
         of Preferred Stock so to be offered (or the aggregate initial
         conversion price of the convertible securities so to be offered) would
         purchase at such current market price and the denominator of which
         shall be the number of shares of Preferred Stock outstanding on such
         record date, plus the number of additional shares of Preferred Stock to
         be offered for subscription or purchase (or into which the convertible
         securities so to be offered are initially convertible). If the
         subscription price may be paid by delivery of consideration part or all
         of which may be in a form other than cash, the value of such non-cash
         consideration shall be as determined in good faith by the Board


                                       14

<PAGE>   18



         of Directors of the Company, whose determination shall be described in
         a statement filed with the Rights Agent and shall be binding on the
         Rights Agent. Shares of Preferred Stock owned by or held for the
         account of the Company shall not be deemed outstanding for the purpose
         of any such computation. Such adjustment shall be made successively
         whenever such a record date is fixed; and if such rights 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)    If the Company fixes a record date for a distribution
         to all holders of Preferred Stock (including any such distribution made
         in connection with a consolidation or merger in which the Company is
         the continuing corporation) of evidences of indebtedness, cash (other
         than a regular cash dividend out of the earnings or retained earnings
         of the Company), assets (other than a dividend payable in Preferred
         Stock, but including any dividend payable in stock other than Preferred
         Stock) or subscription rights or warrants (excluding those referred to
         in Section 11(b) hereof), the Purchase Price to be in effect after such
         record date shall be determined by multiplying the Purchase Price in
         effect immediately before such record date by a fraction, the numerator
         of which shall be the current market price (as determined pursuant to
         Section 11(d) hereof) per share of Preferred Stock on such record date,
         less the fair market value (as determined in good faith by the Board of
         Directors of the Company, whose determination shall be described in a
         statement filed with the Rights Agent and shall be binding on the
         Rights Agent) of the portion of the cash, assets, or evidences of
         indebtedness so to be distributed or of such subscription rights or
         warrants applicable to a share of Preferred Stock and the denominator
         of which shall be such current market price (as determined pursuant to
         Section 11(d) hereof) per share of Preferred Stock. Such adjustments
         shall be made successively whenever such a record date is fixed; and if
         such distribution is not so made, the Purchase Price shall be adjusted
         to be the Purchase Price that would have been in effect if such record
         date had not been fixed.

                  (d)    (i)  For the purpose of any computation hereunder,
                  other than in Section 11(a)(iii) hereof, the "current market
                  price" per share of Common Stock on any date shall be deemed
                  to be the average of the daily closing prices per share of
                  such Common Stock for the thirty (30) consecutive Trading Days
                  (as such term is hereinafter defined) immediately before such
                  date (or, if the Common Stock has been traded on fewer than
                  thirty (30) Trading Days, then the number of Trading Days on
                  which the Common Stock has been traded,) and for the purpose
                  of any computation in Section 11(a)(iii) hereof, the "current
                  market price" per share of Common Stock on any date shall be
                  deemed to be the average of the daily closing prices per share
                  of such Common Stock for the ten (10) consecutive Trading Days
                  immediately following such date; provided, however, that if
                  the current market price per share of the Common Stock is
                  determined during a period following the announcement by the
                  issuer of such Common Stock of (i) a dividend or distribution
                  on such Common Stock payable in shares of such Common Stock or
                  securities convertible into shares of such Common Stock (other
                  than the Rights), or (ii) any subdivision, combination,


                                       15

<PAGE>   19



                  or reclassification of such Common Stock, and before the
                  expiration of the requisite thirty (30) Trading Day or ten
                  (10) Trading Day period, as set forth above, the ex-dividend
                  date for such dividend or distribution, or the record date for
                  such subdivision, combination or reclassification occurs,
                  then, and in each such case, the "current market price" shall
                  be properly adjusted to take into account ex-dividend trading.
                  The closing price for each day shall be the last sale price,
                  regular way, or, if no such sale takes place on such day, the
                  average of the closing bid and asked prices, regular way, in
                  either case as reported in the principal consolidated
                  transaction reporting system with respect to securities listed
                  or admitted to trading on the New York Stock Exchange or, if
                  the shares of Common Stock are not listed or admitted to
                  trading on the New York Stock Exchange, as reported in the
                  principal consolidated transaction reporting system with
                  respect to securities listed on the principal national
                  securities exchange on which the shares of Common Stock are
                  listed or admitted to trading or, if the shares of Common
                  Stock are not listed or admitted to trading on any national
                  securities exchange, the last quoted sale price or, if not so
                  quoted, the average of the high bid and low asked prices in
                  the over-the-counter market, as reported by the National
                  Association of Securities Dealers, Inc. Automated Quotation
                  System ("Nasdaq") or such other system then in use, or, if on
                  any such date the shares of Common Stock are not quoted by any
                  such organization, the average of the closing bid and asked
                  prices as furnished by a professional market maker making a
                  market in the Common Stock selected by the Board of Directors
                  of the Company. If on any such date no market maker is making
                  a market in the Common Stock, the fair value of such shares on
                  such date as determined in good faith by the Board of
                  Directors of the Company shall be used. The term "Trading Day"
                  shall mean a day on which the principal national securities
                  exchange on which the shares of Common Stock are listed or
                  admitted to trading is open for the transaction of business
                  or, if the shares of Common Stock are not listed or admitted
                  to trading on any national securities exchange, a Business
                  Day.

                            (ii)   For the purpose of any computation hereunder,
                  the "current market price" of the Preferred Stock shall be
                  determined in the same manner as set forth above for Common
                  Stock in Section 11(d)(i). If the current market price of the
                  Preferred Stock cannot be determined in the manner provided
                  above, the "current market price" of the Preferred Stock shall
                  be conclusively deemed to be the current market price of the
                  Common Stock (appropriately adjusted to reflect any stock
                  split, stock dividend, or similar transaction occurring after
                  the date hereof), multiplied by one hundred. If neither the
                  Common Stock nor the Preferred Stock is publicly held or so
                  listed or traded, "current 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 and shall
                  be conclusive for all purposes.



                                       16

<PAGE>   20



                (e)      Anything herein to the contrary notwithstanding (except
         the last sentence of this Section 11(e)), no adjustment in the Purchase
         Price shall be required unless such adjustment would require an
         increase or decrease of at least one percent (1%) in the Purchase
         Price; provided, however, that any adjustments that 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
         ten-thousandth of a share, as the case may be. Notwithstanding the
         first sentence of this Section 11(e), any adjustment required by this
         Section 11 shall be made not later than the earlier of (i) three (3)
         years from the date of the transaction that requires such adjustment,
         or (ii) the Expiration Date.

                (f)      If as a result of an adjustment made pursuant to
         Section 11(a) or Section 13(a) hereof, the holder of any Right
         thereafter exercised shall become entitled to receive any shares of
         capital stock other than Preferred Stock, thereafter the number of such
         other shares so receivable upon exercise of any Right and the Purchase
         Price thereof shall be subject to adjustment from time to time in a
         manner and on terms as nearly equivalent as practicable to the
         provisions with respect to the shares of Preferred Stock contained in
         this Section 11, and the provisions of Sections 7, 9, 10, 13, and 14
         hereof with respect to the Preferred Stock shall apply on like terms to
         any such other shares.

                (g)      All Rights originally issued by the Company after any
         adjustment made to the Purchase Price hereunder shall evidence the
         right to purchase, at the adjusted Purchase Price, the number of shares
         of Preferred Stock purchasable from time to time hereunder upon
         exercise of the Rights, all subject to further adjustment as provided
         herein.

                (h)      Unless the Company has 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 before the making of such adjustment
         shall thereafter evidence the right to purchase, at the adjusted
         Purchase Price, that number of shares of Preferred Stock (calculated to
         the nearest ten-thousandth) obtained by (i) multiplying (A) the number
         of shares covered by a Right immediately before this adjustment, by (B)
         the Purchase Price in effect immediately before such adjustment of the
         Purchase Price, and (ii) dividing the product so obtained by the
         Purchase Price in effect immediately after such adjustment of the
         Purchase Price.

                (i)      The Company may elect on or after the date of any
         adjustment of the Purchase Price to adjust the number of Rights, in
         substitution for any adjustment in the number of shares of Preferred
         Stock purchasable upon the exercise of a Right. Each of the Rights
         outstanding after the adjustment in the number of Rights shall be
         exercisable for the number of shares of Preferred Stock for which a
         Right was exercisable immediately before such adjustment. Each Right
         held of record before such adjustment of the number of Rights shall
         become that number of Rights (calculated to the nearest ten-thousandth)
         obtained by dividing the Purchase Price in effect immediately before
         adjustment of the Purchase Price by the


                                       17

<PAGE>   21



         Purchase Price in effect immediately after adjustment of the Purchase
         Price. The Company shall make a public announcement of its election to
         adjust the number of Rights, indicating the record date for the
         adjustment, and, if known at the time, the amount of the adjustment to
         be made. This record date may be the date on which the Purchase Price
         is adjusted or any day thereafter, but, if the Right Certificates have
         been issued, shall be at least ten (10) days later than the date of the
         public announcement. If Right Certificates have been issued, upon each
         adjustment of the number of Rights pursuant to this Section 11(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 before the date of
         adjustment, and upon surrender thereof, if required by the Company, new
         Right Certificates evidencing all the Rights to which such holders
         shall be entitled after such adjustment. Right Certificates so to be
         distributed shall be issued, executed and countersigned in the manner
         provided for herein (and may bear, at the option of the Company, the
         adjusted Purchase Price) and shall be registered in the names of the
         holders of record of Right Certificates on the record date specified in
         the public announcement.

                (j)      Irrespective of any adjustment or change in the
         Purchase Price or the number of shares of Preferred Stock issuable upon
         the exercise of the Rights, the Right Certificates theretofore and
         thereafter issued may continue to express the Purchase Price per share
         and the number of shares that 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 par value of the shares of
         Preferred Stock issuable upon exercise of the Rights, the Company shall
         take any corporate action that may, in the opinion of its counsel, be
         necessary in order that the Company may validly and legally issue fully
         paid and nonassessable shares of Preferred Stock 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 issuance to the holder of any Right
         exercised after such record date the shares of Preferred Stock and
         other capital stock or securities of the Company, if any, issuable upon
         such exercise over and above the shares of Preferred Stock and other
         capital stock or securities of the Company, if any, issuable upon such
         exercise on the basis of the Purchase Price in effect before such
         adjustment; provided, however, that the Company shall deliver to such
         holder a due bill or other appropriate instrument evidencing such
         holder's right to receive such additional shares of Preferred Stock and
         other capital stock or securities upon the occurrence of the event
         requiring such adjustment.



                                       18

<PAGE>   22



                (m)      Anything in this Section 11 to the contrary
         notwithstanding, the Company shall be entitled to make such reductions
         in the Purchase Price, in addition to those adjustments expressly
         required by this Section 11, as and to the extent that in the good
         faith judgment of the Board of Directors of the Company is advisable in
         order that any (i) consolidation or subdivision of the Preferred Stock,
         (ii) issuance for cash of any shares of Preferred Stock at less than
         the current market price, (iii) issuance for cash of shares of
         Preferred Stock or securities that by their terms are convertible into
         or exchangeable for shares of Preferred Stock, (iv) stock dividends, or
         (v) issuance of rights, options or warrants referred to in this Section
         11, hereafter made by the Company to holders of its Preferred Stock
         shall not be taxable to such stockholders.

                (n)      If at any time after the Record Date and before the
         Distribution Date, the Company (i) declares or pays any dividend on the
         Common Stock payable in Common Stock or (ii) effects 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 (A) the number of hundredths of a share of Preferred Stock
         purchasable after such event upon proper exercise of each Right shall
         be determined by multiplying the number of hundredths of a share of
         Preferred Stock so purchasable immediately before such event by a
         fraction, the numerator of which is the number of shares of Common
         Stock outstanding immediately before such event and the denominator of
         which is the number of shares of Common Stock outstanding immediately
         after such event, and (B) each share of Common Stock outstanding
         immediately after such event shall have issued with respect to it that
         number of Rights which each share of Common Stock outstanding
         immediately before such event had issued with respect to it. 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. If an event
         occurs that would require an adjustment under Section 11(a)(ii) and
         this Section 11(n), the adjustments provided for in this Section 11(n)
         shall be in addition and prior to any adjustment required pursuant to
         Section 11(a)(ii).

                (o)      If at the time of or immediately after such
         consolidation, merger, or sale there are any rights, warrants, or other
         instruments or securities outstanding or agreements in effect that
         would substantially diminish or otherwise eliminate the benefits
         intended to be afforded by the Rights, the Company shall not, at any
         time after the Distribution Date, (i) consolidate with, (ii) merge with
         or into, or (iii) sell or transfer (or permit any Subsidiary to sell or
         transfer), in one or more transactions, assets or earning power
         aggregating more than 50% of the assets or earning power of the Company
         and its Subsidiaries (taken as a whole) to, any other Person.

                (p)      The Company shall not, after the Distribution Date,
         except as permitted by Section 23 hereof, take (or permit any
         Subsidiary to take) any action if at the time such action is taken it
         is reasonably foreseeable that such action will diminish substantially
         or eliminate the benefits intended to be afforded by the Rights.


                                       19

<PAGE>   23



         Section 12. Certificate of Adjusted Purchase Price or Number of Shares.
Whenever an adjustment is made as provided in Section 11 or Section 13 hereof,
the Company shall (a) promptly prepare a certificate setting forth such
adjustment and a brief statement of the facts accounting for such adjustment,
(b) promptly file with the Rights Agent, and with each transfer agent for the
Preferred Stock, a copy of such certificate, and (c) mail a brief summary
thereof to each holder of a Right Certificate in accordance with Section 25
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 and adjustment. The Rights Agent may rely on such
certificate and shall not be deemed to have knowledge of any adjustment unless
and until it has received such certificate.

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

                (a)      If, following the Distribution Date, directly or
         indirectly, (i) the Company consolidates with, or merges with and into,
         any other Person, and the Company is not the continuing or surviving
         corporation of such consolidation or merger, (ii) any Person
         consolidates with, or merges with or into, the Company, and the Company
         shall be the continuing or surviving corporation of such consolidation
         or merger and, in connection with such consolidation or merger, all or
         part of the outstanding shares of Common Stock, shall be changed into
         or exchanged for stock or other securities of any other Person or cash
         or any other property, or (iii) the Company sells or otherwise
         transfers (or one or more of its Subsidiaries shall sell or otherwise
         transfer), in one or more transactions, assets or earning power
         aggregating more than 50% of the assets or earning power of the Company
         and its Subsidiaries (taken as a whole) to any Person or Persons (other
         than the Company or any Subsidiary), then, and in each such case,
         proper provision shall be made so that: (A) each holder of a Right,
         except as provided in Section 7(e) hereof, shall thereafter have the
         right to receive, upon the exercise thereof at the Purchase Price then
         current in accordance with the terms of this Agreement, the number of
         validly authorized and issued, fully paid, nonassessable and freely
         tradable shares of common stock of the Principal Party (as such term is
         hereinafter defined), not subject to any rights of first refusal, equal
         to the result obtained by (1) multiplying the Purchase Price then
         current by the number of hundredths of a share of Preferred Stock for
         which a Right was exercisable immediately before the consummation of
         such consolidation, merger, sale, or transfer (without taking into
         account any adjustment previously made pursuant to Section 11(a)(ii)
         hereof) and dividing that product by (2) 50% of the current market
         price (determined pursuant to Section 11(d) hereof) per share of the
         common stock of such Principal Party on the date of consummation 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 of 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,
         it being specifically intended that the provisions of Section 11 hereof
         shall apply only to such Principal Party following the first occurrence
         of an event set forth in this Section 13(a); and (D) such Principal
         Party shall take such steps (including, but not limited to, the
         reservation of a sufficient number of shares


                                       20

<PAGE>   24



         of its common stock) in connection with the consummation of any such
         transaction as may be necessary to assure that the provisions hereof
         shall thereafter be applicable, as nearly as reasonably may be, in
         relation to its shares of common stock thereafter deliverable upon the
         exercise of the Rights.

                (b)      "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), the
                  Person that is the issuer of any securities into which shares
                  of Common Stock of the Company are converted in such merger or
                  consolidation, and if no securities are so issued, the Person
                  that is the other party to such merger or consolidation; and

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

         provided, however, that in any such case, (1) if the common stock of
         such Person is not at such time and has not been continuously over the
         preceding twelve-month period registered under Section 12 of the
         Exchange Act, and such Person is a direct or indirect subsidiary of
         another Person the common stock of which is and has been so registered,
         "Principal Party" shall refer to such other Person; and (2) in case
         such Person is a subsidiary, directly or indirectly, of more than one
         Person, the common stocks of two or more of which are and have been so
         registered, "Principal Party" shall refer to whichever of such Persons
         is the issuer of the common stock having the greatest aggregate market
         value.

                (c)      The Company shall not consummate any such
         consolidation, merger, sale, or transfer unless the Company and such
         Principal Party have executed and delivered to the Rights Agent a
         supplemental agreement providing for the terms set forth in paragraphs
         (a) and (b) of this Section 13 and further providing that, as soon as
         practicable after the date of any consolidation, merger, or sale of
         assets mentioned in paragraph (a) of this Section 13, the Principal
         Party will

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



                                       21

<PAGE>   25



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

         The provisions of this Section 13 shall similarly apply to successive
         mergers or consolidations or sales or other transfers. If one of the
         transactions described in Section 13(a) hereof occurs at any time after
         the occurrence of a transaction described in Section 11(a)(ii) hereof,
         the Rights that have not theretofore been exercised shall thereafter
         become exercisable in the manner described in Section 13(a).

         Section 14. Fractional Rights and Fractional Shares.

                (a)      The Company shall not be required to issue fractions of
         Rights or to distribute Right Certificates that 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
         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 before the date on which such fractional Rights would have
         been otherwise issuable. The closing price of the Rights for any day
         shall be the last sale price, regular way, or, in case no such sale
         takes place on such day, the average of the closing bid and asked
         prices, regular way, in either case as reported in the principal
         consolidated transaction reporting system with respect to securities
         listed or admitted to trading on the New York Stock Exchange or, if the
         Rights are not listed or admitted to trading on the New York Stock
         Exchange, as reported in the principal consolidated transaction
         reporting system with respect to securities listed on the principal
         national securities exchange on which the Rights are listed or admitted
         to trading, or if the Rights are not listed or admitted to trading on
         any national securities exchange, the last quoted price or, if not so
         quoted, the average of the high bid and low asked prices in the
         over-the-counter market, as reported by Nasdaq or such other system
         then in use or, if on any such date the Rights are not quoted by any
         such organization, the average of the closing bid and asked prices as
         furnished by a professional market maker making a market in the Rights
         selected by the Board of Directors of the Company. If on any such date
         no such market maker is making a market in the Rights, the 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 Preferred Stock (other than integral multiples of a hundredth
         of a share of Preferred Stock) upon exercise of the Rights or to
         distribute certificates that evidence fractional shares of Preferred
         Stock (other than integral multiples of a hundredth of a share of
         Preferred Stock). Fractions of shares of Preferred Stock in integral
         multiples of a hundredth of a share may, at the election of the
         Company, be evidenced by depositary receipts, pursuant to an
         appropriate agreement between the Company and a depositary selected by
         it, provided that such


                                       22

<PAGE>   26



         agreement shall provide that the holders of such depositary receipts
         shall have all of the rights, privileges, and preferences to which they
         are entitled as beneficial owners of the shares of Preferred Stock
         represented by such depositary receipts. In lieu of fractional shares
         of Preferred Stock other than integral multiples of a hundredth of a
         share, the Company may pay to the registered holders of Right
         Certificates at the time such Rights are exercised as herein provided
         an amount in cash equal to the same fraction of the current market
         value of one share of Preferred Stock. Any holder of more than one
         Right Certificate may exercise and aggregate all or part of the Rights
         evidenced by two or more Right Certificates so as to obtain a whole
         number of shares of Preferred Stock and to avoid receiving cash in lieu
         of a fractional share of Preferred Stock to which such holder would
         otherwise be entitled upon exercise of the Rights evidenced by a single
         Right Certificate. For purposes of this Section 14(b), the current
         market value of one share of Preferred Stock shall be the closing price
         of a share of Preferred Stock (as determined pursuant to Section 11(d)
         hereof) for the Trading Day immediately before the date of such
         exercise.

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

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

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

                (a)      before the Distribution Date, the Rights will be
         transferable only in connection with the transfer of 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 office of the Rights Agent designated for such
         purposes, duly endorsed or accompanied by a proper instrument of
         transfer; and


                                       23

<PAGE>   27



                (c)      the Company and the Rights Agent may deem and treat the
         person in whose name a Right Certificate (or, before 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 Agent) for all purposes
         whatsoever, and neither the Company nor the Rights Agent shall be
         required to 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 or receive
dividends or be deemed for any purpose the holder of the shares of Preferred
Stock or any other securities of the Company that may at any time be issuable on
the exercise of the Rights represented thereby, nor shall anything contained
herein or in any Right Certificate be construed to confer upon the holder of any
Right Certificate, as such, any of the rights of a stockholder of the Company or
any right to vote for the election of directors or upon any matter submitted to
stockholders at any meeting thereof, or to give or withhold consent to any
corporate action, or to receive notice of meetings or other actions affecting
stockholders (except as provided in Section 24 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 disbursements and other disbursements
         incurred in the administration and execution of this Agreement and the
         exercise and performance of its duties hereunder. The Company also
         agrees to indemnify the Rights Agent for, and to hold it harmless
         against, any loss, liability, or expense, incurred without negligence,
         bad faith, or willful misconduct on the part of the Rights Agent, for
         anything done or omitted by the Rights Agent in connection with the
         acceptance and administration of this Agreement, including the costs
         and expenses of defending against any claim of liability in the
         premises. The indemnification provided for hereunder shall survive the
         expiration of the Rights, the termination of this Agreement and the
         resignation or removal of the Rights Agent. The costs and expenses of
         enforcing this right of indemnification also shall be paid by the
         Company,

                (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 Preferred 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.


                                       24

<PAGE>   28



                (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 succeeding to the shareholder
         services business of the Rights Agent or any successor Rights Agent,
         shall be the successor to the Rights Agent under this Agreement without
         the execution or filing of any paper or any further act on the part of
         any of the parties hereto; provided, however, that such corporation
         would be eligible for appointment as a successor Rights Agent under the
         provisions of Section 21 hereof. If at the time such successor Rights
         Agent succeeds 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 a predecessor
         Rights Agent and deliver such Right Certificates so countersigned; and
         if at that time any of the Right Certificates have not been
         countersigned, any successor Rights Agent may countersign such Right
         Certificates either in the name of the predecessor 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)      If at any time the name of the Rights Agent is changed
         and at such time any of the Right Certificates have been countersigned
         but not delivered, the Rights Agent may adopt the countersignature
         under its prior name and deliver Right Certificates so countersigned;
         and if at that time any of the Right Certificates have not 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, and no implied duties or obligations shall be read into this
Agreement against the Rights Agent, by all of which the Company and the holders
of Right Certificates, by their acceptance thereof, shall be bound:

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



                                       25

<PAGE>   29



                (b)      Whenever in the performance of its duties under this
         Agreement the Rights Agent shall deem it necessary or desirable that
         any fact or matter (including, without limitation, the identity of any
         Acquiring Person and the determination of "current market price") be
         proved or established by the Company before 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 a person
         believed by the Rights Agent to be the Chairman of the Board, the
         President, any Vice President, the Treasurer, any Assistant Treasurer,
         the Secretary, or any Assistant Secretary of the Company, and delivered
         to the Rights Agent; and such certificate shall be full authorization
         to the Rights Agent for any action taken or suffered in good faith by
         it under the provisions of this Agreement in reliance upon such
         certificate.

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

                (d)      The Rights Agent shall not be liable for or by reason
         of any of the statements of fact or recitals contained in this
         Agreement or in the Right Certificates or be required to verify the
         same (except as to its countersignature on such Right Certificates),
         but all such statements and recitals are and shall be deemed to have
         been made by the Company only.

                (e)      The Rights Agent shall not be under any responsibility
         in respect of the validity of this Agreement or the execution and
         delivery hereof (except the due execution hereof by the Rights Agent),
         or in respect of the validity or execution of any 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 adjustment required under the provisions of Section 11 or
         Section 13 hereof or responsible for the manner, method, or amount of
         any such adjustment or the ascertaining of the existence of facts that
         would require any such adjustment (except with respect to the exercise
         of Rights evidenced by Right Certificates after receipt of a
         certificate furnished pursuant to Section 12 describing such change or
         adjustment); nor shall it by any act hereunder be deemed to make any
         representation or warranty as to the authorization or reservation of
         any shares of Preferred Stock or other securities to be issued pursuant
         to this Agreement or any Right Certificate or as to whether any shares
         of Preferred Stock or other securities will, when so issued, be validly
         authorized and issued, fully paid and nonassessable.

                (f)      The Company 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.



                                       26

<PAGE>   30



                (g)      The Rights Agent is hereby authorized and directed to
         accept instructions with respect to the performance of its duties
         hereunder from a person believed by the Rights Agent to be the Chairman
         of the Board, the President, any Vice President, the Secretary, any
         Assistant Secretary, the Treasurer, or any Assistant 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 to be taken by it in good faith in accordance with
         instructions of any such person. Any application by the Rights Agent
         for written instructions from the Company may, at the option of the
         Rights Agent, set forth in writing any action proposed to be taken or
         omitted by the Rights Agent under this Rights Agreement and the date on
         and/or after which such action shall be taken or such omission shall be
         effective. 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 lend money to the Company, or otherwise act as
         fully and freely as though it were not Rights Agent under this
         Agreement. Nothing herein shall preclude the Rights Agent from acting
         in any other capacity for the Company or for any other legal entity.

                (i)      The Rights Agent may execute and exercise any of the
         rights or powers hereby vested in it or perform any duty hereunder
         either itself or by or through its attorneys or agents, and the Rights
         Agent shall not be answerable or accountable for any act, default,
         neglect, or misconduct of any such attorneys or agents, or for any loss
         to the Company resulting from any such act, default, neglect or
         misconduct; provided, however, reasonable care was exercised in the
         selection and continued employment thereof.

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

                (k)      If, with respect to any Right Certificate surrendered
         to the Rights Agent for exercise or transfer, the certificate contained
         in the form of assignment or the form of election to purchase set forth
         on the reverse thereof, as the case may be, has either not been


                                       27

<PAGE>   31



         completed or indicates an affirmative response to clause 1 or 2
         thereof, the Rights Agent shall not take any further action with
         respect to such requested exercise of transfer without first consulting
         with the Company.

                (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 thirty (30) days' notice in writing mailed to the Company, and to each
transfer agent of the Preferred Stock, by registered or certified 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 thirty (30) days' notice in writing, mailed to the Rights
Agent or successor Rights Agent, as the case may be, and to each transfer agent
of the Preferred Stock, by registered or certified mail, and to the holders of
the Right Certificates by first-class mail. If the Rights Agent resigns or is
removed or otherwise becomes incapable of acting, the Company shall appoint a
successor to the Rights Agent. If the Company fails to make such appointment
within a period of thirty (30) days after giving notice of such removal or after
it has been notified in writing of such resignation or incapacity by the
resigning or incapacitated Rights Agent or by any 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 State, in good standing, that is authorized under such laws to
exercise corporate trust powers and is subject to supervision or examination by
federal or state authority and that has at the time of its appointment as Rights
Agent a combined capital and surplus of at least $10,000,000. After appointment,
the successor Rights Agent shall be vested with the same powers, rights, duties
and responsibilities as if it had been originally named as Rights Agent without
further act or deed; but the predecessor Rights Agent shall deliver and transfer
to the successor Rights Agent any property at the time held by it hereunder, and
execute and deliver any further assurance, conveyance, act or deed necessary for
the purpose. Not later than the effective date of any such appointment, the
Company shall file notice thereof in writing with the predecessor Rights Agent
and each transfer agent of the Preferred 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


                                       28

<PAGE>   32



any adjustment or change in the Purchase Price per share and the number, 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 shares of Common Stock
following the Distribution Date and before the redemption or expiration of the
Rights, the Corporation may, with respect to shares of Common Stock so issued or
sold pursuant to the exercise of stock options or under any employee plan or
arrangement granted or awarded on or before the Distribution Date or upon the
exercise, conversion, or exchange of securities hereafter issued by the
Corporation or in any other case, if deemed necessary or appropriate by the
Board of Directors, issue Right Certificates representing the appropriate number
of Rights in connection with such issuance or sale, provided that (i) no such
Right Certificate shall be issued if, and to the extent that, the Corporation
shall be advised by counsel that such issuance would create a significant risk
of material adverse tax consequences to the Corporation or the Person to whom
such Rights Certificate would be issued, and (ii) no such Rights Certificate
shall be issued if, and to the extent that, appropriate adjustment shall
otherwise have been made in lieu of the issuance thereof.

         Section 23.  Redemption and Termination; Exchange.

                (a)      The Board of Directors of the Company may (at any time
         when a majority of the directors then serving are Continuing
         Directors), at its option, at any time before 5:00 p.m., Dallas, Texas,
         time, on the earlier of (i) the close of business on the fifteenth day
         (subject to extension by the Board of Directors as provided below)
         following the Stock Acquisition Date, or (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, as such amount may be
         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
         fifteen-day period referred to in the preceding sentence may be
         extended by the Board of Directors, provided that no such extension may
         be made when a majority of the directors in office are not Continuing
         Directors, and any such extension shall expire immediately when a
         majority of the directors in office are not Continuing Directors. If,
         following the occurrence of a Stock Acquisition Date and following the
         expiration of the Company's right of redemption set forth in the
         preceding sentence but before any Triggering Event, each of the
         following shall have occurred and remain in effect: (1) a Person who
         was an Acquiring Person shall have transferred or otherwise disposed of
         a number of shares of Common Stock in a transaction, or series of
         transactions, that did not result in the occurrence of a Triggering
         Event so that such Person is thereafter a Beneficial Owner of 5% or
         less of the outstanding shares of Common Stock, (2) such Person
         continues for a period of ninety (90) days to beneficially own 5% or
         less of the outstanding shares of Common Stock, (3) during such
         ninety-day period, there are no other Persons who are Acquiring
         Persons, and (4) the transfer or other disposition described in clause
         (1) above was other than pursuant to a transaction, or series of
         transactions that directly or indirectly involved the Company or any of
         its Subsidiaries; then the Company's right of redemption set forth in
         the preceding sentence shall be reinstated. Notwithstanding anything
         contained in this Agreement to the


                                       29

<PAGE>   33



         contrary, the Rights shall not be exercisable pursuant to Section
         11(a)(ii) hereof before the expiration of the Company's right of
         redemption set forth in the first sentence of this Section 23(a).

                (b)      Immediately upon the action of the Board of Directors
         of the Company ordering the redemption of the Rights, evidence of which
         shall have been filed with the Rights Agent, and without any further
         action and without any notice, the right to exercise the Rights will
         terminate and the only right thereafter of the holders of Rights shall
         be to receive the Redemption Price for each Right so held. Promptly
         after the action of the Board of Directors ordering the redemption of
         the Rights, the Company shall give notice of such redemption to the
         Rights Agent and the holders of the Rights then outstanding by mailing
         such notice to all such holders at each holder's last address as it
         appears upon the registry books of the Rights Agent or, before the
         Distribution Date, on the registry books of the Transfer Agent for the
         Common Stock. Any notice that is mailed in the manner herein provided
         shall be deemed given, whether or not the holder receives the notice.
         Each such notice of redemption will state the method by which the
         payment of the Redemption Price will be made.

                (c)      The Board of Directors may, at its option, at any time
         after the occurrence of a Triggering Event, exchange all or part of the
         then outstanding and exercisable Rights 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 shall not be empowered to effect such
         exchange at any time after any Person (other than the Company or any
         Subsidiary, or any Person organized, appointed or established by the
         Company or any Subsidiary for or pursuant to the terms of any such
         plan), together with all Affiliates and Associates of such Person,
         becomes the Beneficial Owner of 50% or more of the Common Stock then
         outstanding.

                (d)      Immediately upon the effective time of the exchange of
         the Rights as specified by the action of the Board of Directors
         ordering the exchange of any Rights pursuant to Section 23(c) and
         without any further action and without any notice, the right to
         exercise such Rights shall terminate and the only right thereafter of a
         holder of such Rights shall be to receive that number of shares of
         Common Stock equal to the number of such Rights held by such holder
         multiplied by the Exchange Ratio. The Company shall promptly give
         public notice of any such exchange; provided, however, that the failure
         to give, or any defect in, such notice shall not affect the validity of
         such exchange. The Company promptly shall mail a notice of any such
         exchange to all of the holders of such Rights at their last addresses
         as they appear upon the registry books of the Rights Agent.



                                       30

<PAGE>   34



                Any notice that 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
         shares of Common Stock for Rights will be effected and, in the event of
         any partial exchange, the number of Rights that will be exchanged. Any
         partial exchange shall be effected pro rata based on the number of
         Rights held by each holder of Rights.

                (e)      In any exchange pursuant to Section 23(c), the Company,
         at its option, may substitute shares of Preferred Stock (or equivalent
         shares) for shares of Common Stock exchangeable for Rights, at the
         initial rate of one one-hundredth of a share of Preferred Stock (or
         equivalent shares) for each share of Common Stock, as appropriately
         adjusted to reflect adjustments in the voting rights of the Preferred
         Stock pursuant to the terms thereof, so that the fraction of a share of
         Preferred Stock delivered in lieu of each share of Common Stock shall
         have the same voting rights as one share of Common Stock.

                In the event that there shall not be sufficient shares of
         Common Stock or shares of Preferred Stock issued but not outstanding or
         authorized but unissued to permit any exchange of Rights as
         contemplated in accordance with this Section 23, the Company shall take
         all such action as may be necessary to authorize additional shares of
         Common Stock or Preferred Stock for issuance upon exchange of the
         Rights.

                (f)      The Company shall not be required to issue fractions of
         shares of Common Stock or to distribute certificates which evidence
         fractional shares of Common Stock. In lieu of such fractional shares of
         Common Stock, the Company shall pay to the registered holders of the
         Right Certificates with regard to which such fractional shares of
         Common Stock would otherwise be issuable an amount in cash equal to the
         same fraction of the current market value of a whole share of Common
         Stock. For the purposes of this Section 23(f), the current market value
         of a whole share of Common Stock shall be the "current market price" of
         a share of Common Stock (as determined pursuant to Section 11(d)(i)
         hereof) for the Trading Day immediately prior to the date of exchange
         pursuant to Section 23(c) hereof.

         Section 24. Notice of Certain Events.

                (a)      If the Company proposes, at any time after the
         Distribution Date, (i) to declare or pay any dividend payable in stock
         of any class to the holders of Preferred Stock or to make any other
         distribution to the holders of Preferred Stock (other than a regular
         quarterly cash dividend out of earnings or retained earnings of the
         Company), or (ii) to offer to the holders of Preferred Stock rights or
         warrants to subscribe for or to purchase any additional shares of
         Preferred Stock or shares of stock of any class or any other
         securities, rights or options, or (iii) to effect any reclassification
         of its Preferred Stock (other than a reclassification involving only
         the subdivision of outstanding shares of Preferred Stock), or (iv) to
         effect any consolidation or merger into or with, or to effect any sale
         or other transfer (or to permit one or more of its Subsidiaries to
         effect any sale or other transfer), in one or


                                       31

<PAGE>   35



         more transactions, of more than 50% of the assets or earning power of
         the Company and its Subsidiaries (taken as a whole) to, any other
         Person, or (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 shares of Common Stock or to effect a subdivision,
         combination, or consolidation of the Common Stock (by reclassification
         or otherwise then by payment of dividends in Common Stock), then, in
         each such case, the Company shall give to each holder of a Right
         Certificate, to the extent feasible, in accordance with Section 25
         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, dissolution, or
         winding up is to take place and the date of participation therein by
         the holders of the shares of Preferred Stock, if any such date is to be
         fixed, and such notice shall be so given in the case of any action
         covered by clause (i) or (ii) above at least twenty (20) days before
         the record date for determining holders of the shares of Preferred
         Stock for purposes of such action, and in the case of any such other
         action, at least twenty (20) days before the date of the taking of such
         proposed action or the date of participation therein by the holders of
         the shares of Preferred Stock, whichever shall be the earlier.

                (b)      If the event set forth in Section 11(a)(ii) hereof
         occurs, then, in any such case, the Company shall as soon as
         practicable thereafter give to each holder of a Right Certificate, to
         the extent feasible, in accordance with Section 25 hereof, a notice of
         the occurrence of such event, which shall specify the event and the
         consequences of the event to holders of Rights under Section 11(a)(ii)
         hereof.

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

                           NCI Building Systems, Inc.
                           7301 Fairview
                           Houston, Texas 77041
                           Attn:  Secretary

Subject to the provisions of Section 21, any notice or demand authorized by this
Agreement to be given or made by the Company or by the holder of any Right
Certificate to or on the Rights Agent shall be 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
                           Attn:  Ray Rosenbaum


                                       32

<PAGE>   36



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 26. Supplements and Amendments. During any period in which the
Rights are redeemable, except for a supplement or amendment that would change
the Redemption Price, Final Expiration Date, Purchase Price, number of shares of
Preferred Stock for which a Right is then exercisable, or if the rights are not
then redeemable, reinstate a right of redemption, at any time and from time to
time, 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 Right
Certificates in order (i) to change any provision of this Agreement if the
Rights are then redeemable, (ii) to cure any ambiguity, (iii) to correct or
supplement any provision contained herein that may be defective or inconsistent
with any other provisions herein, or (iv) to change or supplement the provisions
hereunder in any manner that the Company may deem necessary or desirable and
which does not adversely affect the interests of the holders of Right
Certificates (other than an Acquiring Person or an Affiliate or Associate of an
Acquiring Person). Upon the delivery of a certificate from an appropriate
officer of the Company which states that the proposed supplement or amendment is
in compliance with the terms of this Section 26, the Rights Agent shall execute
such supplement or amendment. Before the Distribution Date, the interests of the
holders of Rights shall be deemed coincident with the interests of the holders
of Common Stock. 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 27. 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 successors and assigns hereunder.

         Section 28. Determinations and Actions by the Board of Directors, etc.
For all purposes of this Agreement, any calculation of the number of shares of
Preferred Stock or Common Stock outstanding at any particular time, including
for purposes of determining the particular percentage of such outstanding shares
of Preferred Stock or Common Stock of which any Person is the Beneficial Owner,
shall be made in accordance with the provisions of Rule 13d-3(d)(1)(i) of the
General Rules and Regulations under the Exchange Act. The Board of Directors of
the Company shall have the exclusive power and authority to administer this
Agreement and to exercise all rights and powers specifically granted to the
Board of the Company, or as may be necessary or advisable in the administration
of this Agreement, including 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 a determination to
redeem or not to redeem the Rights or to amend the Agreement). All such actions,
calculations, interpretations, and determinations (including, for purpose of
clause (2) below, all omissions with respect to the foregoing) that are done


                                       33

<PAGE>   37



or made by the Board in good faith, shall (1) be final, conclusive, and binding
on the Company, the Rights Agent, the holders of the Right Certificates and all
other parties, and (2) not subject the Board to any liability to the holders of
the Right Certificates.

         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, before the Distribution
Date, registered holders of 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, before the Distribution Date, registered
holders of the Common Stock).

         Section 30. 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;
provided, however, that notwithstanding anything in this Agreement to the
contrary, if any such term, provision, covenant, or restriction is held by such
court or authority to be invalid, void, or unenforceable and the Board of
Directors of the Company determines in its good faith judgment that severing the
invalid language from the Agreement would adversely affect the purpose or effect
of the Agreement, the right of redemption set forth in Section 23 hereof shall
be reinstated, and shall not expire until the close of business on the tenth day
following the date of such determination by the Board of Directors.

         Section 31. Governing Law. This Agreement shall be construed in
accordance with and governed by the laws of the State of Delaware applicable to
contracts made and performed entirely within that state, except as to the rights
and obligations of the Rights Agent, which shall be governed by and construed in
accordance with the laws of the State of Illinois.

         Section 32. Counterparts. This Agreement may be executed in any number
of counterparts, each of which so executed shall be deemed to be an original,
but all such counterparts shall together constitute but one and the same
instrument.

         Section 33. Descriptive Headings. Descriptive headings of the 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.


                [THE NEXT FOLLOWING PAGE IS THE SIGNATURE PAGE.]


                                       34

<PAGE>   38



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

                                     NCI BUILDING SYSTEMS, INC.



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



                                     HARRIS TRUST AND SAVINGS BANK,
                                     as Rights Agent



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









                                       35

<PAGE>   39



                                                                       EXHIBIT A


                           CERTIFICATE OF DESIGNATION
                                       OF
                  SERIES A JUNIOR PARTICIPATING PREFERRED STOCK
                                       OF
                           NCI BUILDING SYSTEMS, INC.

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

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

         NCI Building Systems, Inc., a corporation organized and existing under
the General Corporation Law of the State of Delaware (the "Corporation"), hereby
certifies that the following resolution was adopted by the Board of Directors of
the Corporation in accordance with Section 151 of the General Corporation Law at
a meeting duly called and held on June 24, 1998:

         RESOLVED, that, pursuant to the authority granted to and vested in the
         Board of Directors of this Corporation (the "Board of Directors" or the
         "Board") in accordance with the provisions of the Restated Certificate
         of Incorporation, the Board of Directors hereby creates a series of
         Preferred Stock, par value $1.00 per share (the "Preferred Stock"), of
         the Corporation and hereby states the designation and number of shares,
         and fixes the relative rights, preferences, and limitations thereof as
         follows:

         Series A Junior Participating Preferred Stock:

                  1.     Designation and Amount. The shares of such series shall
         be designated as "Series A Junior Participating Preferred Stock" (the
         "Series A Preferred Stock") and the number of shares constituting the
         Series A Preferred Stock shall be 600,000.

                  Such number of shares may be increased or decreased by
         resolution of the Board of Directors; provided, that no decrease shall
         reduce the number of shares of Series A Preferred Stock to a number
         less than the number of shares then outstanding plus the number of
         shares reserved for issuance upon the exercise of outstanding options,
         rights, or warrants or upon the conversion of any outstanding
         securities issued by the Corporation convertible into Series A
         Preferred Stock.

                  2.     Dividends and Distributions.

                  (a)    Subject to the rights of the holders of any shares of
         any series of Preferred Stock (or any similar stock) ranking prior and
         superior to the Series A Preferred Stock with


                               Exhibit A - Page 1

<PAGE>   40



         respect to dividends, the holders of shares of Series A Preferred
         Stock, in preference to the holders of Common Stock, par value $0.01
         per share (the "Common Stock"), of the Corporation, and of any other
         junior stock, shall be entitled to receive, when, as and if declared by
         the Board of Directors out of funds legally available for the purpose,
         quarterly dividends payable in cash on the first day of February, May,
         August and November in each year (each such date being referred to
         herein as a "Quarterly Dividend Payment Date"), commencing on the first
         Quarterly Dividend Payment Date after the first issuance of a share or
         fraction of a share of Series A Preferred Stock, in an amount per share
         (rounded to the nearest cent) equal, subject to the provision for
         adjustment hereinafter set forth, to 100 times the aggregate per share
         amount of all cash dividends, and 100 times the aggregate per share
         amount (payable in kind) of all non-cash dividends or other
         distributions, other than a dividend payable in shares of Common Stock
         or a subdivision of the outstanding shares of Common Stock (by
         reclassification or otherwise), declared on the Common Stock since the
         immediately preceding Quarterly Dividend Payment Date or, with respect
         to the first Quarterly Dividend Payment Date, since the first issuance
         of any share or fraction of a share of Series A Preferred Stock. If the
         Corporation at any time declares or pays any dividend on the Common
         Stock payable in shares of Common Stock, or effects a subdivision or
         combination or consolidation of the outstanding shares of Common Stock
         (by reclassification or otherwise than by payment of a dividend in
         shares of Common Stock) into a greater or lesser number of shares of
         Common Stock, then in each such case the amount to which holders of
         shares of Series A Preferred Stock were entitled immediately before
         such event shall be adjusted by multiplying such amount by a fraction,
         the numerator of which is the number of shares of Common Stock
         outstanding immediately after such event and the denominator of which
         is the number of shares of Common Stock that were outstanding
         immediately before such event.

                  (b)    The Corporation shall declare a dividend or
         distribution on the Series A Preferred Stock as provided in Paragraph
         (a) of this Section immediately after it declares a dividend or
         distribution on the Common Stock (other than a dividend payable in
         shares of Common Stock).

                  (c)    Dividends shall begin to accrue and be cumulative on
         outstanding shares of Series A Preferred Stock from the Quarterly
         Dividend Payment Date next preceding the date of issue of such shares,
         unless the date of issue of such shares is before the record date for
         the first Quarterly Dividend Payment Date, in which case dividends on
         such shares shall begin to accrue from the date of issue of such
         shares, or unless the date of issue is a Quarterly Dividend Payment
         Date or is a date after the record date for the determination of
         holders of shares of Series A Preferred Stock entitled to receive a
         quarterly dividend and before such Quarterly Dividend Payment Date, in
         either of which events such dividends shall being to accrue and be
         cumulative from such Quarterly Dividend Payment Date. Accrued but
         unpaid dividends shall not bear interest. Dividends paid on the shares
         of Series A Preferred Stock in an amount less than the total amount of
         such dividends at the time accrued and payable on such shares shall be
         allocated pro rata on a share-by-share basis among all such shares at


                               Exhibit A - Page 2

<PAGE>   41



         the time outstanding. The Board of Directors may fix a record date for
         the determination of holders of shares of Series A Preferred Stock
         entitled to receive payment of a dividend or distribution declared
         thereon, which record date shall be not more than 60 days before the
         date fixed for the payment thereof.

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

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

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

                  (c)    Except as set forth herein, holders of Series A
         Preferred Stock shall have no voting rights.

                  4.     Certain Restrictions.

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

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

                         (ii)  declare or pay dividends, or make any other
                  distributions, on any shares of stock ranking in parity
                  (either as to dividends or upon liquidation,


                               Exhibit A - Page 3

<PAGE>   42



                  dissolution or winding up) with the Series A Preferred Stock,
                  except dividends paid ratably on the Series A Preferred Stock
                  and all such parity stock on which dividends are payable or in
                  arrears in proportion to the total amounts to which the
                  holders of all such shares are then entitled;

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

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

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

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

                  6.     Liquidation, Dissolution or Winding Up. Upon any
         liquidation, dissolution or winding up of the Corporation, no
         distribution shall be made (a) to the holders of shares of stock
         ranking junior (either as to dividends or upon liquidation, dissolution
         or winding up) to the Series A Preferred Stock unless, prior thereto,
         the holders of shares of Series A Preferred Stock shall have received
         $100 per share, plus an amount equal to accrued and unpaid dividends
         and distributions thereon, whether or not declared, to the date of such
         payment, provided that the holders of shares of Series A Preferred
         Stock shall be entitled to receive an aggregate amount per share,
         subject to the provision for adjustment hereinafter


                               Exhibit A - Page 4

<PAGE>   43



         set forth, equal to 100 times the aggregate amount to be distributed
         per share to holders of shares of Common Stock, or (b) to the holders
         of shares of stock ranking in parity (either as to dividends or upon
         liquidation, dissolution or winding up) with the Series A Preferred
         Stock, except distributions made ratably on the Series A Preferred
         Stock and all such parity stock in proportion to the total amounts to
         which the holders of all such shares are entitled upon such
         liquidation, dissolution or winding up. If the Corporation at any time
         declares or pays any dividend on the Common Stock payable in shares of
         Common Stock, or effects a subdivision or combination or consolidation
         of the outstanding shares of Common Stock (by reclassification or
         otherwise than by payment of a dividend in shares of Common Stock) into
         a greater or lesser number of shares of Common Stock, then in each such
         case the aggregate amount to which holders of shares of Series A
         Preferred Stock were entitled immediately before such event under the
         provision in clause (a) of the preceding sentence shall be adjusted by
         multiplying such amount by a fraction, the numerator of which is the
         number of shares of Common Stock outstanding immediately after such
         event and the denominator of which is the number of shares of Common
         Stock that were outstanding immediately before such event.

                  7.     Consolidation, Merger, etc. If the Corporation enters
         into any consolidation, merger, combination or other transaction in
         which the shares of Common Stock are exchanged for or changed into
         other stock or securities, cash or any other property, then in any such
         case each share of Series A Preferred Stock shall at the same time be
         similarly exchanged or changed into an amount per share, subject to the
         provision for adjustment hereinafter set forth, equal to 100 times the
         aggregate amount of stock, securities, cash or any other property
         (payable in kind), as the case may be, into which or for which each
         share of Common Stock is changed or exchanged. If the Corporation at
         any time declares or pays any dividend on the Common Stock payable in
         shares of Common Stock, or effects a subdivision or combination or
         consolidation of the outstanding shares of Common Stock (by
         reclassification or otherwise than by payment of a dividend in shares
         of Common Stock) into a greater or lesser number of shares of Common
         Stock, then in each such case the amount set forth in the preceding
         sentence with respect to the exchange or change of shares of Series A
         Preferred Stock shall be adjusted by multiplying such amount by a
         fraction, the numerator of which is the number of shares of Common
         Stock outstanding immediately after such event and the denominator of
         which is the number of shares of Common Stock that were outstanding
         immediately before such event.

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

                  9.     Rank. The Series A Preferred Stock shall rank, with
         respect to the payment of dividends and the distribution of assets,
         junior to all series and any other class of the Corporation's Preferred
         Stock.

                  10.    Amendment. The Restated Certificate of Incorporation of
         the Corporation shall not be amended in any manner that would
         materially alter or change the powers,


                               Exhibit A - Page 5

<PAGE>   44



         preferences or special rights of the Series A Preferred Stock so as to
         affect them adversely without the affirmative vote of the holders of at
         least a majority of the outstanding shares of Series A Preferred Stock,
         voting together as a single series.

         IN WITNESS WHEREOF, this Certificate of Designation is executed on
behalf of the Corporation by its _____________________ and attested by its
Secretary this ____ day of ________, 1998.



                                     NCI BUILDING SYSTEMS, INC.


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


[SEAL]

ATTEST:


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



                               Exhibit A - Page 6

<PAGE>   45



                                                                       EXHIBIT B


                            Form of Right Certificate


Certificate No. R_______                   ________ Rights


         NOT EXERCISABLE AFTER JUNE 24, 2008, OR EARLIER IF REDEMPTION OCCURS.
         THE RIGHTS ARE SUBJECT TO REDEMPTION AT $0.01 PER RIGHT ON THE TERMS
         SET FORTH IN THE RIGHTS AGREEMENT. UNDER CERTAIN CIRCUMSTANCES
         (SPECIFIED IN SECTION 7(e) OF THE RIGHTS AGREEMENT), RIGHTS
         BENEFICIALLY OWNED BY ACQUIRING PERSONS OR ANY SUBSEQUENT HOLDER OF
         SUCH RIGHTS MAY BECOME NULL AND VOID. [THE RIGHTS REPRESENTED BY THIS
         RIGHT CERTIFICATE ARE OR WERE BENEFICIALLY OWNED BY A PERSON WHO WAS OR
         BECAME AN ACQUIRING PERSON OR AN AFFILIATE OR AN ASSOCIATE OF AN
         ACQUIRING PERSON (AS SUCH TERMS ARE DEFINED IN THE RIGHTS AGREEMENT).
         ACCORDINGLY, THIS RIGHT CERTIFICATE AND THE RIGHTS REPRESENTED HEREBY
         MAY BECOME VOID IN THE CIRCUMSTANCES SPECIFIED IN SECTION 7(e) OF THE
         RIGHTS AGREEMENT.]*

                                Right Certificate

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

         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 June 24, 1998 (the "Rights Agreement"), between NCI
Building Systems, Inc., a Delaware 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 time is defined in the Rights Agreement)
and before 5:00 p.m., Texas time, on June 24, 2008, at the offices of the Rights
Agent, or at the office of its successor as Rights Agent, one one-hundredth of a
fully paid and nonassessable share of Series A Junior Participating Preferred

- -------------- 
     *The portion of the legend in brackets is inserted only if applicable.


                               Exhibit B - Page 1

<PAGE>   46



Stock, par value $1.00 per share (the "Preferred Shares"), of the Company, at a
purchase price of $______ per one one-hundredth of a Preferred Share (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 hundredths of a Preferred
Share that may be purchased upon exercise hereof) set forth above, are the
number and the Purchase Price as of ________, 19__, based on the Preferred
Shares as constituted at such date.

         As provided in the Rights Agreement, the Purchase Price and the number
of hundredths of a Preferred Share that 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 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 offices of the Rights Agent, may be exchanged for
another Right Certificate or Right Certificates of like tenor (except for the
issuance date thereof) evidencing Rights entitling the holder to purchase a like
aggregate number of Preferred Shares as the Rights evidenced by the Right
Certificate or Right Certificates surrendered entitled such holder to purchase.
If this Right Certificate is 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.


                               Exhibit B - Page 2

<PAGE>   47



         Subject to the provisions of the Rights Agreement, the Rights evidenced
by this Certificate may, but are not required to, be redeemed by the Company at
a redemption price of $0.01 per Right.

         No fractional Preferred Shares will be issued upon the exercise of any
Right or Rights evidenced hereby (other than fractions that are integral
multiples of one one-hundredth of a Preferred Share, 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 the Preferred Shares or of any other securities of
the Company that 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 hereof, 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 have been exercised as provided in the
Rights Agreement.

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

         WITNESS the facsimile signature of the proper officers of the Company
and its corporate seal. Dated as of __________, 19__.




                               Exhibit B - Page 3

<PAGE>   48



ATTEST:                                    NCI BUILDING SYSTEMS, INC.




                                           By:
- --------------------------------              ----------------------------------
Secretary                                  Its:
                                               ---------------------------------


Countersigned:


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



By:
   -----------------------------
      Authorized Signature





                               Exhibit B - Page 4

<PAGE>   49



                               FORM OF ASSIGNMENT


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

         FOR VALUE RECEIVED __________________________ hereby sells, assigns, 
         and transfers unto_____________________________________________________
                  (Please print name and address of transferee)
         _______________________________________________________________________
         _______________________________________ 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 correspondence
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





<PAGE>   50



                          FORM OF ELECTION TO PURCHASE

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

To:             NCI BUILDING SYSTEMS, INC.

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


(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 correspondence
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




<PAGE>   51


                                     NOTICE


        The signature in the foregoing Forms of Assignment and Election 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.

        If the certification set forth above in the Forms of Assignment and
Election is not completed, the Company will deem the beneficial owner of the
Rights evidenced by this Right Certificate to be an Acquiring Person or an
Affiliate or Associate thereof (as defined in the Rights Agreement) and, in the
case of an Assignment, will affix a legend to that effect on any Right
Certificate issued in exchange for this Right Certificate.





<PAGE>   1
                                                      NCI BUILDING SYSTEMS, INC.
                                                                   7301 FAIRVIEW
                                                               HOUSTON, TX 77041
                                                                    713-466-7788

                                                         TRADED: NASDAQ/NMS:BLDG


FOR FURTHER INFORMATION:
At the Company:
Johnie Schulte, Jr.
President and CEO
(713) 466-7788

FOR IMMEDIATE RELEASE
WEDNESDAY, JUNE 24, 1998

          NCI BUILDING SYSTEMS, INC. DECLARES TWO-FOR-ONE STOCK SPLIT
                                  - - - - -
                        APPROVES STOCKHOLDER RIGHTS PLAN

HOUSTON, TX -- JUNE 24, 1998 -- NCI BUILDING SYSTEMS, INC. (CURRENTLY
NASDAQ:BLDG), today announced that its Board of Directors has approved a
two-for-one common stock split. It also announced that the Board has approved a
Stockholder Rights Plan.

Shareholders will receive one additional share of common stock for each share
they hold on the record date.  The additional shares will be distributed on
July 22, 1998 to shareholders of record as of the close of trading on July 8,
1998.  NCI currently has approximately 9 million common shares outstanding.
After giving effect to the split, the Company will have approximately 18
million common shares outstanding.

Through June 24, 1998, the market value of NCI common stock has increased 62.4
percent from $33.25 per share on July 24, 1997 -- one year ago.  NCI shares
closed yesterday at $54.

Johnie Schulte, CEO of NCI, commented, "This two-for-one stock split
underscores NCI's strong performance and our commitment to future profitability
and growth.  While an increasing number of institutional investors own shares
of NCI, it is out goal to keep the price of NCI stock within a comfortable
range for all investors, as well as enhance trading liquidity by increasing the
total number of shares available without any dilution."

The Company advises stockholders that the two-for-one stock split will increase
their number of shares owned in the Company, but does not change their existing
proportionate ownership.  Existing certificates should not be destroyed nor
returned to the Company as they continue to represent the number of shares
shown on their face.

                                    - more -
<PAGE>   2
NCI Building Systems, Inc.
Add 1


The Company also announced that its board of directors has approved a
Stockholder Rights Plan similar to those that have been adopted by leading
companies across the country.  Mr. Schulte said, "The Stockholder Rights Plan
is not being adopted in response to any outside attempt to acquire control of
the Company.  The rights being issued under this plan are intended to ensure
that all of the Company's stockholders receive fair and equal treatment in the
event of any takeover attempt, and to enable the Company's stockholders to
realize the long-term value of their investment in the Company.  Although the
rights do not prevent a takeover, they should encourage anyone seeking to
acquire the Company to negotiate with the board of directors before making such
an attempt."

Under the Stockholder Rights plan, each stockholder will receive one Right for
each share of the Company's outstanding common stock, after giving effect to
the two-for-one stock split.  Initially, the Rights are represented by the
Company's common stock certificates and are not exercisable.  The Rights will
become exercisable only if a person acquires, or announces a tender offer which
would result in, ownership of 20 percent or more of the Company's common stock.
If a person acquires ownership of 20 percent or more of the Company's common
stock, all holders of Rights other than the acquiring person will be entitled
to purchase the Company's common stock at half-price.  If there is an
acquisition of the Company through a merger or other business combination, the
rights will entitle holders to purchase a number of the acquiring company's
common shares having a market value at the time of twice the exercise price of
the rights.

NCI designs, manufactures and markets metal building systems, components and
roll-up doors for non-residential and steel frame housing industries.  NCI
completed its fiscal year ended October 31, 1997 with record sales and net
income of $407.8 million and $27.9 million, respectively.  Over the last five
years, NCI has recorded a compound annual growth rate in net income of 39%.
Its recent acquisition of Metal Building Components, Inc. creates one of the
world's largest integrated suppliers to the construction industry, with
combined fiscal pro forma 1997 revenues of over $8__ million from 39 facilities
located in 19 states and Mexico.

- --------------------------------------------------------------------------------
 The information contained in this release pertaining to the Company's future
 performance subsequent to the stock split and Stockholder Rights Plan, as well
 as management's statements concerning the future growth prospects of the
 Company are "forward-looking" statements, as defined in the Private Securities
 Litigation Reform Act of 1995.  Actual performance may differ from that
 projected in such statements.  Investors should refer to statements regularly
 filed by the Company in its annual report to the Securities and Exchange
 Commission on Form 10-K and its Quarterly Reports to the SEC on Form 10-Q for
 a discussion of factors which could affect the Company's operations and
 forward-looking statements made in this communication.  The Company expressly
 disclaims any obligation to release publicly any updates or revisions to these
 forward-looking statements to reflect any changes in expectations.
- --------------------------------------------------------------------------------


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