LUFKIN INDUSTRIES INC
8-A12G, 1996-05-15
GENERAL INDUSTRIAL MACHINERY & EQUIPMENT
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<PAGE>
 
                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549


                                    FORM 8-A

               FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES

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

                        SECURITIES EXCHANGE ACT OF 1934
 
                            LUFKIN INDUSTRIES, INC.
- --------------------------------------------------------------------------------
              (Exact Name of Registrant as Specified in Charter)
 
         Texas                                          75-0404410
- --------------------------------------------------------------------------------
(State of Incorporation                                (IRS Employer
   or Organization)                                  Identification No.)
 
 
601 South Raguet, Lufkin, Texas                          75902-0849
- --------------------------------------------------------------------------------
   (Address of Principal                                 (Zip Code)
     Executive Offices)

Securities to be Registered Pursuant to Section 12(b) of the Act:  None

Securities to be Registered Pursuant to Section 12(g) of the Act:
 
 
                         Common Stock Purchase Rights
- --------------------------------------------------------------------------------
                               (Title of Class)
<PAGE>
 
Item 1.  Description of Securities to be Registered.
         ------------------------------------------ 

     On May 15, 1996, the Board of Directors of Lufkin Industries, Inc., (the
"Company") declared a dividend distribution of one Right for each outstanding
share of Lufkin Common Stock to shareholders of record at the close of business
on May 31, 1996.  Each Right entitles the registered holder to purchase from the
Company one share of Common Stock of the Company, (the "Common Stock") at a
Purchase Price of $75 per share, subject to adjustment.  The Purchase Price must
be paid in cash at the time of exercise.  The description and terms of the
Rights are set forth in a Rights Agreement (the "Rights Agreement") between the
Company and Lufkin National Bank, as Rights Agent.

     Initially, the Rights will be attached to all Common Stock certificates
representing shares then outstanding, and no separate Rights Certificates will
be distributed.  The Rights will separate from the Common Stock and a
Distribution Date will occur upon the earlier of (i) ten days following a public
announcement that a person or group of affiliated or associated persons (an
"Acquiring Person") has acquired, or obtained the right to acquire, beneficial
ownership of 20% or more of the outstanding shares of Common Stock (the "Stock
Acquisition Date"), or (ii) ten days following the commencement of a tender
offer or exchange offer that would result in a person or group beneficially
owning 30% or more of such outstanding shares of Common Stock.  Until the
Distribution Date, (i) the Rights will be evidenced by the Common Stock
certificates and will be transferred with and only with such Common Stock
certificates, (ii) new Common Stock certificates issued after May 31, 1996 will
contain a notation incorporating the Rights Agreement by reference and (iii) the
surrender for transfer of any certificates for Common Stock outstanding will
also constitute the transfer of the Rights associated with the Common Stock
represented by such certificate.

     The Rights are not exercisable until the Distribution Date and will expire
at the close of business on May 31, 2006, unless earlier redeemed by the Company
as described below.

     As soon as practicable after the Distribution Date, Rights Certificates
will be mailed to holders of record of the Common Stock as of the close of
business on the Distribution Date and, thereafter, the separate Rights
Certificates alone will represent the Rights.  Except as otherwise determined by
the Board of Directors, and except in certain other circumstances specified in
the Rights Agreement, only shares of Common Stock issued prior to the
Distribution Date will be issued with Rights.

     In the event that, at any time following the Distribution Date, (i) the
Company is the surviving corporation in a merger with an Acquiring Person and
its Common Stock is not changed or exchanged, (ii) an Acquiring Person engages
in one or more "self-dealing" transactions as set forth in the Rights Agreement,
or (iii) during such time as there is an Acquiring Person, an event occurs which
results in such Acquiring Person's ownership interest being increased by more
than 1% (e.g., a reverse stock split or recapitalized), each holder of a Right
will thereafter have the right to receive, upon exercise, Common Stock (or, in
certain circumstances, other consideration of the Company) having a value equal
to two times the exercise price of the Right.  Notwithstanding any 
<PAGE>
 
of the foregoing, following the occurrence of any of the events set forth in
this paragraph, all Rights that are, or (under certain circumstances specified
in the Rights Agreement) were, beneficially owned by any Acquiring Person will
be null and void. However, the right to purchase Common Stock of the Company
having a value equal to two times the exercise price is not exercisable
following the occurrence of either of the events set forth above until such time
as the Rights are no longer redeemable by the Company as set forth below.

     For example, at an exercise price of $75 per Right, each Right not owned by
an Acquiring Person (or by certain related parties) following an event set forth
in the preceding paragraph would entitle its holder to purchase $150 worth of
Common Stock (or other consideration, as noted above) for $75.  Assuming that
the Common Stock had a per share value of $37.50 at such time, the holder of
each valid Right would be entitled to purchase four shares of Common Stock for
$75.

     In the event that, at any time following the Stock Acquisition Date, (i)
the Company is acquired in a merger or other business combination transaction in
which the Company is not the surviving corporation (other than a merger
described in the second preceding paragraph), or (ii) 50% or more of the
Company's assets or earning power is sold or transferred, each holder of a Right
(except Rights which previously have been voided as set forth above) shall
thereafter have the right to receive, upon exercise, common stock of the
acquiring company having a value equal to two times the exercise price of the
Right.  The events set forth in this paragraph and in the second preceding
paragraph are referred to as the "Triggering Events."

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

     With certain exceptions, no adjustment in the Purchase Price will be
required until cumulative adjustments amount to at least 1% of the Purchase
Price.  In addition, to the extent that the Company does not have sufficient
shares of Common Stock issuable upon exercise of the Rights following the
occurrence of a Triggering Event, the Company may, under certain circumstances,
reduce the Purchase Price.  No fractional shares will be issued and, in lieu
thereof, an adjustment in cash will be made based on the market price of the
Common Stock on the last trading day prior to the date of exercise.

     At any time until fifteen days following the Stock Acquisition Date, the
Company may redeem the Rights in whole, but not in part, at a price of $.05 per
Right.  Under certain circumstances set forth in the Rights Agreement, however,
the Rights may only be redeemed if not less than a majority of the Board of
Directors consists of Continuing Directors and a majority of such Continuing
<PAGE>
 
Directors concur in the decision to redeem the Rights.  After the redemption
period has expired, the Company's right of redemption may be reinstated if an
Acquiring Person reduces his beneficial ownership to 10% or less of the
outstanding shares of Common Stock in a transaction or series of transactions
not involving the Company. Immediately upon the action of the Board of Directors
ordering redemption of the Rights, the Rights will terminate and the only right
of the holders of Rights will be to receive the $.05 redemption price.

     The term "Continuing Directors" means any member of the Board of Directors
of the Company who was a member of the Board prior to the date of the Rights
Agreement, and any person who is subsequently elected to the Board if such
person is recommended or approved by a majority of the Continuing Directors, but
shall not include an Acquiring Person, or an affiliate or associate of an
Acquiring Person, or any representative of the foregoing entities.

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

     Other than those provisions relating to the principal economic terms of the
Rights, any of the provisions of the Rights Agreement may be amended by the
Board of Directors of the Company prior to the Distribution Date.  After the
Distribution Date, the provisions of the Rights Agreement may be amended by the
Board (in certain circumstances, with the concurrence of the Continuing
Directors) in order to cure any ambiguity, to make changes which do not
adversely affect the interests of holders of Rights (excluding the interests of
any Acquiring Person), or to shorten or lengthen any time period under the
Rights Agreement; provided, however, that no amendment to adjust the time period
governing redemption shall be made at such time as the Rights are not
redeemable.

     As of April 30, 1996, there were 6,721,883 shares of Common Stock issued.
Each outstanding share of Common Stock as of the close of business on May 31,
1996 will receive one Right.  As long as the Rights are attached to the Common
Stock, and in certain other circumstances described above, the Company will
issue one Right for each share of Common Stock issued. 7,837,971 shares of
Common Stock will initially be reserved for issuance upon exercise of the
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 a substantial number of Rights being acquired.
The Rights should not interfere with any merger or other business combination
approved by the Board of Directors of the Company since the Board of Directors
(under certain circumstances, with the concurrence of the Continuing Directors)
may, at its option, at any time prior to the close of business on the earlier of
(i)  the fifteenth day following 
<PAGE>
 
the Stock Acquisition Date (or such later date not to exceed one year from the
Stock Acquisition Date which may be set by the Board of Directors while the
Rights are still redeemable) or (ii) May 31, 2006, redeem all but not less than
all the then outstanding Rights at $.05 per Right.

     The form of Rights Agreement between the Corporation and the Rights Agent
specifying the terms of the Rights, which includes as Exhibit A thereto the form
of Rights Certificate, is attached hereto as Exhibit 1 and is incorporated
herein by reference. The foregoing description of the Rights does not purport to
be complete and is qualified in its entirety by reference to such Exhibits.

Item 2.    Exhibits
           --------
               1     Rights Agreement, dated as of May 15, 1996, between
                     Lufkin Industries, Inc. and Lufkin National Bank, as
                     Rights Agent, including Form of Rights Certificate
                     (Exhibit A) and Summary of Common Stock Purchase
                     Rights (Exhibit B).
<PAGE>
 
                                  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 hereunto duly authorized.


Date:  May 15, 1996                     By:  /s/ C. James Haley, Jr.
                                           ------------------------------
                                           Name:  C. James Haley, Jr.
                                           Title:  Secretary -- Treasurer

<PAGE>
 
- --------------------------------------------------------------------------------

                            LUFKIN INDUSTRIES, INC.

                                      and

                              LUFKIN NATIONAL BANK

                                  Rights Agent



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



                                Rights Agreement

                            Dated as of May 15, 1996


- --------------------------------------------------------------------------------
<PAGE>
 
                               TABLE OF CONTENTS
                               -----------------
 
Section                                                                     Page
- -------                                                                     ----
 
1             Certain Definitions............................................ 3

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

3             Issue of Rights Certificates................................... 6

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

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

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

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

9             Reservation and Availability of Capital Stock..................11

10            Common Stock Record Date.......................................12

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

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

13            Consolidation, Merger or Sale or Transfer of Assets or
              Earning Power..................................................21

14            Fractional Rights and Fractional Shares........................23

15            Rights of Action...............................................24

16            Agreement of Rights Holders....................................24

17            Rights Certificate Holder Not Deemed a Stockholder.............25

18            Concerning the Rights Agent....................................25

19            Merger or Consolidation or Change of Name of Rights Agent......25

                                       i
<PAGE>
 
20            Duties of Rights Agent.........................................26

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

22            Issuance of New Rights Certificates............................29

23            Redemption and Termination.....................................29

24            Notice of Certain Events.......................................30

25            Notices........................................................31

26            Supplements and Amendments.....................................32

27            Successors.....................................................32

28            Determinations and Actions by the Board of Directors, etc......32

29            Benefits of this Ageement......................................33

30            Severability...................................................33

31            Governing Law..................................................33

32            Counterparts...................................................33

33            Descriptive Heading............................................33

                                       ii
<PAGE>
 
                                RIGHTS AGREEMENT
                               -----------------

          RIGHTS AGREEMENT, dated as of May 15, 1996 (the "Agreement"), between
Lufkin Industries, Inc., a Texas corporation (the "Company"), and Lufkin
National Bank (the "Rights Agent").


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

          WHEREAS, on May 15, 1996 (the "Rights Declaration Date"), the Board of
Directors of the Company authorized and declared a dividend distribution of one
Right for each share of Common Stock (as hereinafter defined) of the Company
outstanding at the close of business on May 31, 1996 (the "Record Date"), and
has authorized the issuance of one Right for each share of Common Stock of the
Company that may become outstanding between the Record Date and the Distribution
Date (as hereinafter defined), each Right representing the right to purchase one
share of Common Stock of the Company upon the terms and subject to the
conditions hereinafter set forth;

          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 who or which, together
with all Affiliates and Associates of such Person, shall be the Beneficial Owner
of 20% or more of the shares of Common Stock then outstanding, but shall not
include the Company, any Subsidiary of the Company, any employee benefit plan of
the Company or of any Subsidiary of the Company, or any Person or entity
organized, appointed or established by the Company for or pursuant to the terms
of any such plan.

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

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

              (i) which such Person or any of such Person's Affiliates or
          Associates, directly or indirectly, has 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, warrants or options, or otherwise; provided, however,
                                                             --------  -------
          that a Person shall not be deemed the "Beneficial Owner" of, or to
          "beneficially own" (A) securities tendered pursuant to a tender
<PAGE>
 
          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) securities issuable upon exercise of
          Rights at any time prior to the occurrence of a Triggering Event, or
          (C) securities issuable upon exercise of Rights from and after the
          occurrence of a Triggering Event, which Rights were acquired by such
          Person or any of such Person's Affiliates or Associates prior to the
          Distribution Date or pursuant to Section 3(a) or Section 22 hereof
          (the "Original Rights") or pursuant to Section 11(i) hereof in
          connection with any adjustment made with respect to any Original
          Rights;

              (ii) which such Person or any of such Person's Affiliates or
          Associates, directly or indirectly, has the right to vote or dispose
          of or has "beneficial ownership" of (as determined pursuant to Rule
          13d-3 of the General Rules and Regulations under the Exchange Act),
          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 subparagraph (ii) as a result of an agreement,
          arrangement or understanding to vote such security if such agreement,
          arrangement or understanding: (A) 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 (B) is not
          also then reportable by such Person on Schedule 13D under the Exchange
          Act (or any comparable or successor report); or

              (iii) which are beneficially owned, directly or indirectly, by any
          other Person (or any Affiliate or Associate thereof) with which such
          Person (or any of such Person's Affiliates or Associates) has any
          agreement, arrangement or understanding (whether or not in writing),
          for the purpose of acquiring, holding, voting (except pursuant to a
          revocable proxy as described in the proviso to subparagraph (ii) of
          this paragraph (c)) or disposing of any voting securities of the
          Company; provided, however, that no such agreement, arrangement or
                   --------  -------                         
          understanding shall be deemed to exist for purposes of this subsection
          (iii) by reason of (A) any actions taken or actions to be taken from
          time to time in the future by Continuing Directors acting in their
          capacity as directors of the Company or (B) any relationship existing
          at the time of the adoption of this Agreement between or among
          shareholders of the Company who are related by blood or marriage to a
          Continuing Director at the time of the adoption of this Agreement.

          Notwithstanding anything contained in this Section 1(c) to the
contrary, securities (including any securities issuable upon conversion or
exercise of such securities) issued (or agreed to be issued) by the Company or a
Subsidiary of the Company to any Person or Persons prior to the Stock
Acquisition Date shall not be deemed to be "beneficially owned" by such Person
or Persons for purposes of determining whether any such Person is an Acquiring
Person or whether a Stock Acquisition Date has occurred, provided that (i) such
securities were issued (or agreed to be issued) as part of a business
combination (as hereinafter defined) involving such Person or Persons, and (ii)
it is contemplated at the time of issuance (or agreement to issue) that such
securities will be

                                      -2-
<PAGE>
 
transferred (and in fact are transferred within one year of issuance) to other
Persons.  In the event that such securities are not transferred to other Persons
within one year of issuance, then such Person or Persons shall be deemed to
"beneficially own" all such securities beneficially owned by it or them at the
end of such year.  For purposes hereof, the term "business combination" shall
mean any merger or consolidation of the Company or any Subsidiary of the Company
with any other Person, any sale or exchange to the Company or any Subsidiary of
the Company of all or any part of the assets of any other Person or any
Subsidiary of such other Person or any other transaction pursuant to which all
or any part of the assets and operations of any other Person and its
Subsidiaries are combined with or acquired by the Company or any Subsidiary of
the Company.

          (d) "Business Day" shall mean any day other than a Saturday, Sunday or
a day on which banking institutions in the States of Texas or New York 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., New
York City time (or Houston, Texas time for purposes of Section 23 hereof), on
such date; provided, however, that if such date is not a Business Day it shall
           --------  -------                                                  
mean 5:00 P.M., New York City time (or Houston, Texas time for purposes of
Section 23 hereof), on the next succeeding Business Day.

          (f) "Common Stock" shall mean the common stock, par value $1.00 per
share, of the Company, except that "Common Stock" when used with reference to
any Person other than the Company shall mean the capital stock or other equity
security with the greatest voting power of such Person or, if such Person is a
Subsidiary of another Person, the Person which ultimately controls such first-
mentioned Person.

          (g) "Continuing Director" shall mean (i) any member of the Board of
Directors of the Company, while such Person is a member of the Board, who is not
an Acquiring Person, or an Affiliate or Associate of any Acquiring Person, or a
representative of an Acquiring Person or of any such Affiliate or Associate, and
was a member of the Board prior to the date of this Agreement, or (ii) any
Person who subsequently becomes a member of the Board, while such Person is a
member of the Board, who is not an Acquiring Person, or an Affiliate or
Associate of an Acquiring Person, or a representative of an Acquiring Person or
of any such Affiliate or Associate, if such Person's nomination for election or
election to the Board is recommended or approved by a majority of the Continuing
Directors.

          (h) "Distribution Date" shall have the meaning defined in Section 3
hereof.

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

          (j) "Section 11(a)(ii) Event" shall mean any event described in
Section 11(a)(ii) (A) or (B) hereof.

                                      -3-
<PAGE>
 
          (k) "Section 13 Event" shall mean any event described in clauses (x),
(y) or (z) of Section 13(a) hereof.

          (l) "Stock Acquisition Date" shall mean the first date of public
announcement (which, for purposes of this definition, shall include, without
limitation, a report filed pursuant to Section 13(d) under the Exchange Act) by
the Company or an Acquiring Person that an Acquiring Person has become such.

          (m) "Subsidiary" shall mean, with reference to any Person, any
corporation of which an amount of voting securities sufficient to elect at least
a majority of the directors of such corporation is beneficially owned, directly
or indirectly, by such Person, or otherwise controlled by such Person.

          (n) "Triggering Event" shall mean any Section 11(a)(ii) Event or any
Section 13 Event.

Any determination required by the definitions contained in this Section 1 shall
be made by a majority of the Continuing Directors in their good faith judgment,
which determinations shall be final and binding on all parties.

          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
in accordance with the terms and conditions hereof, and the Rights Agent hereby
accepts such appointment.  The Company may from time to time appoint such Co-
Rights Agents as it may deem necessary or desirable.

          Section 3.   Issue of Rights Certificates.
                       ---------------------------- 

          (a) Until the earlier of (i) the close of business on the tenth day
after the Stock Acquisition Date, or (ii) the close of business on the tenth day
after the date that a tender or exchange offer by any Person (other than the
Company, any Subsidiary of the Company, any employee benefit plan of the Company
or of any Subsidiary of the Company, or any Person or entity organized,
appointed or established by the Company for or pursuant to the terms of any such
plan) is first published or sent or given within the meaning of Rule 14e-2(a) of
the General Rules and Regulations under the Exchange Act, if upon consummation
thereof, such Person would be the Beneficial Owner of 30% or more of the shares
of Common Stock then outstanding (the earlier of (i) and (ii) being herein
referred to as the "Distribution Date"), (x) 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 (y) the Rights
will be transferable only in connection with the transfer of the underlying
shares of Common Stock.  As soon as practicable after the Distribution Date, the
Rights Agent will send by first-class, insured, postage prepaid mail, to each
record holder of the Common Stock as of the close of business on the
Distribution Date, at the address of such holder shown on the records of the
Company, one or more rights certificates, in substantially the form of Exhibit A
hereto (the "Rights Certificates"), evidencing one Right for each

                                      -4-
<PAGE>
 
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
Rights Certificates.

          (b) As promptly as practicable following the Record Date, the Company
will send a copy of a Summary of Rights, in substantially the form attached
hereto as Exhibit B (the "Summary of Rights"), by first-class, postage prepaid
mail, to each record holder of the Common Stock as of the close of business on
the Record Date, at the address of such holder shown on the records of the
Company.  With respect to certificates for the Common Stock outstanding as of
the Record Date, until the 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 Rights Certificates, whenever distributed, shall be dated as of the
Record Date and on their face shall entitle the holders thereof to purchase such
number of shares of Common Stock as shall be set forth therein at the price set
forth therein (the "Purchase Price"), but the amount and type of securities
purchasable upon the exercise of each Right and the Purchase Price thereof shall
be subject to adjustment as provided herein.

          (b) Any Rights Certificate issued pursuant to Section 3(a) or Section
22 hereof that represents Rights beneficially owned by:  (i) an Acquiring Person
or any Associate or Affiliate of any Acquiring Person, (ii) a transferee of an
Acquiring Person (or of any such Associate or Affiliate) who becomes a
transferee after the Acquiring Person becomes such, or (iii) a transferee of an
Acquiring Person (or of any such Associate or Affiliate) who becomes a
transferee prior to or concurrently with the Acquiring Person becoming such and
receives such Rights pursuant to either (A) a transfer (whether or not for
consideration) from the Acquiring Person to holders of equity interests in such
Acquiring Person or to any Person with whom such Acquiring Person has any
continuing agreement, arrangement or understanding regarding the transferred
Rights or (B) a transfer which the Board of Directors of the Company has
determined is a part of a plan, arrangement or understanding which has as a
primary purpose or effect avoidance of Section 7(e) hereof, and any Rights
Certificate issued pursuant to Section 6 or Section 11 hereof upon transfer,
exchange, replacement or adjustment of any other Rights Certificate referred to
in this sentence, shall contain (to the extent feasible) the following legend:

          The Rights represented by this Rights 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 Rights Certificate and the Rights
     represented hereby may become null and void in the circumstances specified
     in Section 7(e) of such Agreement.

The Company shall notify the Rights Agent, and, if such notification is given
orally, the Company shall confirm same in writing on or prior to the Business
Day next following, at such time as the Company has notice that any Person
constitutes an Acquiring Person or an Affiliate or Associate of an Acquiring
Person, and until such notice is received by the Rights Agent, the Rights Agent
may conclusively presume for all purposes that the foregoing legend need be
imprinted only on Rights Certificates beneficially owned by Persons that the
Company has previously identified to the Rights

                                      -5-
<PAGE>
 
Agent as constituting an Acquiring Person or an Affiliate or Associate of an
Acquiring Person and transferees of any such Persons.  The Rights Agent,
however, will use its best efforts to assist the Company in its efforts to
identify any such persons.

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

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

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

      Section 6.   Transfer, Split Up, Combination and Exchange of Rights
                   ------------------------------------------------------
Certificates; Mutilated, Destroyed, Lost or Stolen Rights 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 at or
prior to the close of business on the Expiration Date, any Rights Certificate or
Certificates may be transferred, split up, combined or exchanged for another
Rights Certificate or Certificates, entitling the registered holder to purchase
a like number of shares of Common Stock (or, following a Triggering Event, other
securities, cash or other assets, as the case may be) as the Rights 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 Rights Certificate or Certificates shall make
such request in writing delivered to the Rights Agent, and shall surrender the
Rights Certificate or Certificates to be transferred, split up, combined or
exchanged at the principal office or offices 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
Rights Certificate until the registered holder shall have completed and signed
the certificate contained in the form of assignment on the reverse side of such
Rights

                                      -6-
<PAGE>
 
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), Section 7(e) and Section 14 hereof, countersign
and deliver to the Person entitled thereto a Rights Certificate or Rights
Certificates, as the case may be, as so requested. The Company may require
payment of a sum sufficient to cover any tax or governmental charge that may be
imposed in connection with any transfer, split up, combination or exchange of
Rights Certificates.

     (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 Rights
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 Rights Certificate if
mutilated, the Company will execute and deliver a new Rights Certificate of like
tenor to the Rights Agent for countersignature and delivery to the registered
owner in lieu of the Rights Certificate so lost, stolen, destroyed or mutilated.

      Section 7.   Exercise of Rights; Purchase Price; Expiration Date of
                   ------------------------------------------------------
Rights.  (a)  Subject to Section 7(e) hereof, the registered holder of any
Rights Certificate may exercise the Rights evidenced thereby (except as
otherwise provided herein including, without limitation, 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 Rights Certificate, with the form of election to purchase and
the certificate on the reverse side thereof duly executed, to the Rights Agent
at the principal office or offices of the Rights Agent designated for such
purpose, together with payment of the aggregate Purchase Price with respect to
the total number of shares (or other securities, cash or other assets, as the
case may be) as to which such surrendered Rights are then exercisable, at or
prior to the earlier of (i) the close of business on May 31, 2006 (the "Final
Expiration Date"), or (ii) the time at which the Rights are redeemed as provided
in Section 23 hereof (the earlier of (i) and (ii) being herein referred to as
the "Expiration Date").

     (b) The Purchase Price for each share of Common Stock pursuant to the
exercise of a Right shall initially be $75, and shall be subject to adjustment
from time to time as provided in Sections 11 and 13(a) hereof and shall be
payable in accordance with paragraph (c) below.

     (c) Upon receipt of a Rights Certificate representing exercisable Rights,
with the form of election to purchase and the certificate duly executed,
accompanied by payment, with respect to each Right so exercised, of the Purchase
Price per share of Common Stock (or other shares, securities, cash or other
assets, as the case may be) to be purchased as set forth below and an amount
equal to any applicable transfer tax, the Rights Agent shall, subject to Section
20(k) hereof, thereupon promptly (i) (A) requisition from any transfer agent of
the shares of Common Stock (or make available, if the Rights Agent is the
transfer agent for such shares) certificates for the total number of shares of
Common Stock to be purchased and the Company hereby irrevocably authorizes its
transfer agent to comply with all such requests, or (B) if the Company shall
have elected to deposit

                                      -7-
<PAGE>
 
the total number of shares of Common Stock issuable upon exercise of the Rights
hereunder with a depositary agent, requisition from the depositary agent
depositary receipts representing such number of shares of Common Stock as are to
be purchased (in which case certificates for the shares of Common Stock
represented by such receipts shall be deposited by the transfer agent with the
depositary agent) and the Company will direct 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 in accordance with Section 14 hereof,
(iii) after receipt of such certificates or depositary receipts, cause the same
to be delivered to or upon the order of the registered holder of such Rights
Certificate, registered in such name or names as may be designated by such
holder, and (iv) after receipt thereof, deliver such cash, if any, to or upon
the order of the registered holder of such Rights Certificate.  The payment of
the Purchase Price (as such amount may be reduced pursuant to Section 11(a)(iii)
hereof) shall be made in cash or by certified bank check or bank draft payable
to the order of the Company. In the event that the Company is obligated to issue
other securities of the Company, pay cash or distribute other property pursuant
to Section 11(a) hereof, the Company will make all arrangements necessary so
that such other securities, cash or other property are available for
distribution by the Rights Agent, if and when appropriate.

     (d) In case the registered holder of any Rights Certificate shall exercise
less than all the Rights evidenced thereby, a new Rights Certificate evidencing
Rights equivalent to the Rights remaining unexercised shall be issued by the
Rights Agent and delivered to, or upon the order of, the registered holder of
such Rights Certificate, registered in such name or names as may be designated
by such holder, subject to the provisions of Section 14 hereof.

     (e) Notwithstanding anything in this Agreement to the contrary, from and
after the first occurrence of a Section 11(a)(ii) 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 of any such Associate or
Affiliate) who becomes a transferee after the Acquiring Person becomes such, or
(iii) a transferee of an Acquiring Person (or of any such Associate or
Affiliate) who becomes a transferee prior to or concurrently with the Acquiring
Person becoming such and receives such Rights pursuant to either (A) a transfer
(whether or not for consideration) from the Acquiring Person to holders of
equity interests in such Acquiring Person or to any Person with whom the
Acquiring Person has any continuing agreement, arrangement or understanding
regarding the transferred Rights or (B) a transfer which the Board of Directors
of the Company has determined is part of a plan, arrangement or understanding
which has a primary purpose or effect the avoidance of this Section 7(e), shall
become null and void without any further action and no holder of such Rights
shall have any rights whatsoever with respect to such Rights, whether under any
provision of this Agreement or otherwise; provided, however, that the Rights
                                          --------  -------                 
held by an Acquiring Person, an Affiliate or Associate of an Acquiring Person or
the transferees of such persons referred to above shall not be voided unless the
Acquiring Person in question or an Affiliate or Associate of such Acquiring
Person shall be involved in the transaction giving rise to the Section 11(a)(ii)
Event. The Company shall use all reasonable efforts to insure that the
provisions of this Section 7(e) and Section 4(b) hereof are complied with; but
neither the Company nor the Rights Agent shall have any liability to any holder
of Rights Certificates or other Person as a result of the Company's failure to
make any

                                      -8-
<PAGE>
 
determinations 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 such registered holder shall have (i)
completed and signed the certificate contained in the form of election to
purchase set forth on the reverse side of the Rights Certificate surrendered for
such exercise, and (ii) provided such additional evidence of the identity of the
Beneficial Owner (or former Beneficial Owner) or Affiliates or Associates
thereof as the Company shall reasonably request.

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

      Section 9.   Reservation and Availability of Capital Stock.  (a)  The
                   ---------------------------------------------           
Company covenants and agrees that it will cause to be reserved and kept
available out of its authorized and unissued shares of Common Stock, the number
of shares of Common Stock that, as provided in this Agreement including Section
11(a)(iii) hereof, will be sufficient to permit the exercise in full of all
outstanding Rights.

     (b) In the event that the shares of Common Stock 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 such time as the
Rights become exercisable, all shares reserved for such issuance 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 earliest date after the first occurrence of a Section
11(a)(ii) Event on which the consideration to be delivered by the Company upon
exercise of the Rights has been determined in accordance with Section
11(a)(iii) hereof, or as soon as is required by law following the Distribution
Date, as the case may be, a registration statement under the Securities Act of
1933 (the "Act"), with respect to the 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 Act) until the earlier of (A) the date as of
which the Rights are no longer exercisable for such

                                      -9-
<PAGE>
 
securities, and (B) the date of the expiration of the Rights.  The Company will
also take such action as may be appropriate under, or to ensure compliance with,
the securities or "blue sky" laws of the various states in connection with the
exercisability of the rights.  The Company may temporarily suspend, for a period
of time not to exceed ninety (90) days after the date set forth in clause (i) of
the first sentence of this Section 9(c), the exercisability of the rights in
order to prepare and file such registration statement and permit it to become
effective.  Upon any such suspension, the Company shall issue a public
announcement stating that the exercisability of the Rights has been temporarily
suspended, as well as a public announcement at such time as the suspension is no
longer in effect. Notwithstanding any provision of this Agreement to the
contrary, the Rights shall not be exercisable in any jurisdiction unless the
requisite qualification in such jurisdiction shall have been obtained.

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

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

      Section 10.   Common Stock Record Date.  Each person in whose name any
                    ------------------------                                
certificate for shares of Common 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 such shares of Common Stock (or other securities,
as the case may be) represented thereby on, and such certificate shall be dated,
the date upon which the Rights 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 Common 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 Common Stock (or other
securities, as the case may be) transfer books of the Company are open. Prior to
the exercise of the Rights evidenced thereby, the holder of a Rights 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, without
limitation, the right to vote, to receive dividends or other distributions or to
exercise any preemptive

                                      -10-
<PAGE>
 
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) In the event the Company shall at any time after the date of
      this Agreement (A) declare a dividend on the Common Stock payable in
      shares of Common Stock, (B) subdivide the outstanding Common Stock, (C)
      combine the outstanding Common Stock into a smaller number of shares, or
      (D) issue any shares of its capital stock in a reclassification of the
      Common Stock (including any such reclassification in connection with a
      consolidation or merger in which the Company is the continuing or
      surviving corporation), except as otherwise provided in this Section 11(a)
      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
      subdivision, combination or reclassification, and the number and kind of
      shares of Common Stock or capital stock, as the case may be, issuable on
      such date, shall be proportionately adjusted so that the holder of any
      Right exercised after such time shall be entitled to receive, upon payment
      of the Purchase Price then in effect, the aggregate number and kind of
      shares of Common Stock or capital stock, as the case may be, which, if
      such Right had been exercised immediately prior to such date and at a time
      when the Common Stock transfer books of the Company were open, he would
      have owned upon such exercise and been entitled to receive by virtue of
      such dividend, subdivision, combination or reclassification. If an event
      occurs which would require an adjustment under both this Section 11(a)(i)
      and Section 11(a)(ii) hereof, the adjustment provided for in this Section
      11(a)(i) shall be in addition to, and shall be made prior to, any
      adjustment required pursuant to Section 11(a)(ii) hereof.

         (ii) In the event:

             (A) any Acquiring Person or any Associate or Affiliate of any
         Acquiring Person, at any time after the date of this Agreement,
         directly or indirectly, (1) shall merge into the Company or otherwise
         combine with the Company and the Company shall be the continuing or
         surviving corporation of such merger or combination and the Common
         Stock of the Company shall remain outstanding and unchanged, (2) shall,
         in one transaction or a series of transactions, transfer any assets to
         the Company or to any of its Subsidiaries in exchange (in whole or in
         part) for shares of Common Stock, for shares of other equity securities
         of the Company, or for securities exercisable for or convertible into
         shares of equity securities of the Company (Common Stock or otherwise)
         or otherwise obtain from the Company, with or without consideration,
         any additional shares of such equity securities or securities
         exercisable for or convertible into shares of such equity securities
         (other than pursuant to a pro rata distribution to all holders of
         Common Stock or upon the exercise of Rights or the conversion of a 

                                      -11-
<PAGE>
 
         convertible security of the Company in accordance with its terms), (3)
         shall sell, purchase, lease, exchange, mortgage, pledge, transfer or
         otherwise acquire or dispose of, in one transaction or a series of
         transactions, to, from or with (as the case may be) the Company or any
         of its Subsidiaries, assets (including securities) on terms and
         conditions less favorable to the Company than the Company would be able
         to obtain in arm's-length negotiation with an unaffiliated third party,
         other than pursuant to a transaction set forth in Section 13(a) hereof,
         (4) shall sell, purchase, lease, exchange, mortgage, pledge, transfer
         or otherwise acquire or dispose of in one transaction or a series of
         transactions, to, from or with (as the case may be) the Company or any
         of the Company's Subsidiaries (other than incidental to the lines of
         business, if any, engaged in as of the date hereof between the Company
         and such Acquiring Person or Associate or Affiliate) assets having an
         aggregate fair market value of more than $5,000,000, other than
         pursuant to a transaction set forth in Section 13(a) hereof, (5) shall
         receive any compensation from the Company or any of the Company's
         Subsidiaries other than compensation for full-time employment as a
         regular employee at rates in accordance with the Company's (or its
         Subsidiaries') past practices, or (6) shall receive the benefit,
         directly or indirectly (except proportionately as a stockholder and
         except if resulting from a requirement of law or governmental
         regulation), of any loans, advances, guarantees, pledges or other
         financial assistance or any tax credits or other tax advantage provided
         by the Company or any of its Subsidiaries, or

             (B) during such time as there is an Acquiring Person, there shall
         be any reclassification of securities (including any reverse stock
         split), or recapitalization of the Company, or any merger or
         consolidation of the Company with any of its Subsidiaries or any other
         transaction or series of transactions involving the Company or any of
         its Subsidiaries, other than a transaction or transactions to which the
         provisions of Section 13(a) apply (whether or not with or into or
         otherwise involving an Acquiring Person) which has the effect, directly
         or indirectly, of increasing by more than 1% the proportionate share of
         the outstanding shares of any class of equity securities of the Company
         or any of its Subsidiaries which is directly or indirectly beneficially
         owned by any Acquiring Person or any Associate or Affiliate of any
         Acquiring Person,

then, promptly following the first occurrence of such an event, 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 then current Purchase Price in accordance with the terms of this
Agreement such number of shares of Common Stock of the Company as shall equal
the result obtained by (x) multiplying the then current Purchase Price by the
number of shares of Common Stock for which a Right was exercisable immediately
prior to the first occurrence of a Section 11(a)(ii) Event, and (y) dividing
that product (which, following such first occurrence, shall thereafter be
referred to as the "Purchase Price" for each Right and for all purposes of this
Agreement) by 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
(such number of shares, the "Adjustment Shares").

                                      -12-
<PAGE>
 
         (iii) In the event that the number of shares of Common Stock which are
      authorized by the Company's certificate of incorporation but not
      outstanding or reserved for issuance for purposes other than upon exercise
      of the Rights are not sufficient to permit the exercise in full of the
      Rights in accordance with the foregoing subparagraph (ii) of this Section
      11(a), the Company shall: (A) determine the excess of (1) the value of the
      Adjustment Shares issuable upon the exercise of a Right (the "Current
      Value") over (2) the Purchase Price (such excess being herein referred to
      as the "Spread"), and (B) with respect to each Right, make adequate
      provision during the Substitution Period (as hereinafter defined) to the
      extent permitted by law to substitute for the Adjustment Shares, upon
      payment of the applicable Purchase Price, (1) a reduction in the Purchase
      Price, (2) Common Stock or other equity securities of the Company, (3)
      shares, or depositary receipts for shares, of voting preference stock
      which the Board of Directors of the Company has deemed to have
      substantially the same economic value (without regard to voting rights) as
      shares of Common Stock (such shares of voting preference stock being
      herein referred to as "common stock equivalents"), (4) other securities of
      the Company, or (5) any combination of the foregoing, having an aggregate
      value equal to the Current Value, where such aggregate value has been
      determined by the Board of Directors of the Company based upon the advice
      of a nationally recognized investment banking firm selected by the Board
      of Directors of the Company. The "Substitution Period" shall be the thirty
      (30) day period following the later of (x) the first occurrence of a
      Section 11(a)(ii) Event and (y) the date on which the Company's right of
      redemption pursuant to Section 23(a) expires (the later of (x) and (y)
      being referred to herein as the "Section 11(a)(ii) Trigger Date"), unless
      the Board of Directors of the Company shall determine in good faith that
      it is likely that sufficient additional shares of Common Stock could be
      authorized for issuance upon exercise in full of the Rights, in which
      event the thirty (30) day period set forth above may be extended by the
      Company to the extent necessary, but not more than ninety (90) days after
      the Section 11(a)(ii) Trigger Date, in order that the Company may seek
      shareholder approval for the authorization of such additional shares. To
      the extent that the Company determines that some action need be taken
      pursuant to the first or second sentences of this Section 11(a)(iii), or
      both, the Company (x) shall provide, subject to Section 7(e) hereof, that
      such action shall apply uniformly to all outstanding Rights, and (y) may
      suspend the exercisability of the Rights until the expiration of the
      Substitution Period in order to seek any authorization of additional
      shares or to decide the appropriate form of distribution to be made
      pursuant to such first sentence and to determine the value thereof. In the
      event of any such suspension, the Company shall issue a public
      announcement stating that the exercisability of the Rights has been
      temporarily suspended, as well as a public announcement at such time as
      the suspension is no longer in effect. For purposes of this Section
      11(a)(iii), the value of the Common Stock shall be the current market
      price (as determined pursuant to Section 11(d) hereof) per share of the
      Common Stock on the Section 11(a)(ii) Trigger Date and the value of any
      "common stock equivalent" shall be deemed to have the same value as the
      Common Stock on such date.

     (b) In case the Company shall fix a record date for the issuance of rights,
options or warrants to all holders of Common Stock entitling them to subscribe
for or purchase (for a period expiring

                                      -13-
<PAGE>
 
within forty-five (45) calendar days after such record date) Common Stock, or
common stock equivalents, or securities convertible into Common Stock or a
common stock equivalent at a price per share of Common Stock or per share of
common stock equivalent (or having a conversion price per share, if a security
convertible into Common Stock or a common stock equivalent is less than the
current market price as determined pursuant to Section 11(d) hereof) per share
of Common Stock on such record date, the Purchase Price to be in effect after
such record date shall be determined by multiplying the Purchase Price in effect
immediately prior to such record date by a fraction, the numerator of which
shall be the number of shares of Common Stock outstanding on such record date,
plus the number of shares of Common Stock which the aggregate offering price of
the total number of shares of Common Stock or common stock equivalents 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 Common Stock outstanding
on such record date, plus the number of additional shares of Common Stock or
common stock equivalents to be offered for subscription or purchase (or into
which the convertible securities so to be offered are initially convertible).
In case such subscription price may be paid by delivery of consideration part or
all of which may be in a form other than cash, the value of such consideration
shall be as determined in good faith by the Board of Directors of the Company,
whose determination shall be described in a statement filed with the Rights
Agent and shall be binding on the Rights Agent and the holders of the Rights.
Shares of Common Stock owned by or held for the account of the Company shall not
be deemed outstanding for the purpose of any such computation. Such adjustment
shall be made successively whenever such a record date is fixed, and in the
event that such rights or warrants are not so issued, the Purchase Price shall
be adjusted to be the Purchase Price which would then be in effect if such
record date had not been fixed.

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

                                      -14-
<PAGE>
 
     (d) For the purpose of any computation hereunder, other than computations
made pursuant to Section 11(a)(iii) hereof, the "current market price" per
share of Common Stock on any date shall be deemed to be the average of the daily
closing prices per share of such Common Stock for the thirty (30) consecutive
Trading Days (as such term is hereinafter defined) immediately prior to such
date, and for purposes of computations made pursuant to Section 11(a)(iii)
hereof, the "current market price" per share of Common Stock on any date shall
be deemed to be the average of the daily closing prices per share of such Common
Stock for the ten (10) consecutive Trading Days immediately following such date;
provided, however, that in the event that 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 (a) a dividend or distribution on such Common
Stock payable in shares of such Common Stock or securities convertible into
shares of such Common Stock (other than the Rights), or (B) any subdivision,
combination or reclassification of such Common Stock, and prior to the
expiration of the requisite thirty (30) Trading Day or ten (10) Trading Day
period, as set forth above, after the ex-dividend date for such dividend or
distribution, or the record date for such subdivision, combination or
reclassification, then, and in each such case, the "current market price" shall
be properly adjusted to take into account ex-dividend trading.  The closing
price for each day shall be the last sale price, regular way, or, in case no
such sale takes place on such day, the average of the closing bid and asked
prices, regular way, in either case as reported in the principal consolidated
transaction reporting system with respect to securities listed on the principal
national securities exchange on which the shares of Common Stock are listed or
admitted to trading or, if the shares of Common Stock are not listed or admitted
to trading on any national securities exchange, the last quoted price or, if not
so quoted, the average of the high bid and low asked prices in the over-the-
counter market, as reported by the 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. If the Common Stock is not publicly held or not so listed or
traded, "current market price" per share shall mean the fair value per share as
determined in good faith by the Board of Directors of the Company, whose
determination shall be described in a statement filed with the Rights Agent and
shall be conclusive for all purposes.

     (e) Anything herein to the contrary notwithstanding no adjustment in the
Purchase Price shall be required unless such adjustment would require an
increase or decrease of at least one percent (1%) in the Purchase Price;
provided, however, that any adjustments which by reason of this Section 11(e)
- ------------------                                                           
are not required to be made shall be carried forward and taken into account in
any subsequent adjustment.  All calculations under this Section 11 shall be made
to the nearest cent or to the nearest ten-thousandth of a share of Common Stock
or other share, as the case may be. Notwithstanding the

                                      -15-
<PAGE>
 
first sentence of this Section 11(e), any adjustment required by this Section 11
shall be made no later than the earlier of (i) three (3) years from the date of
the transaction which mandates such adjustment, or (ii) the Expiration Date.

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

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

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

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

                                      -16-
<PAGE>
 
which such holders shall be entitled as a result of such adjustment, or, at the
option of the Company, shall cause to be distributed to such holders of record
in substitution and replacement for the Rights Certificates held by such holders
prior to the date of adjustment, and upon surrender thereof, if required by the
Company, new Rights Certificates evidencing all the Rights to which such holders
shall be entitled after such adjustment. Rights Certificates so to be
distributed shall be issued, executed and countersigned in the manner provided
for herein (and may bear, at the option of the Company, the adjusted Purchase
Price) and shall be registered in the names of the holders of record of Rights
Certificates on the record date specified in the public announcement.

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

     (k) Before taking any action that would cause an adjustment reducing the
Purchase Price below the then stated value, if any, of the number of shares of
Common Stock issuable upon exercise of the Rights, the Company shall take any
corporate action which may, in the opinion of its counsel, be necessary in order
that the Company may validly and legally issue fully paid and nonassessable such
number of shares of Common 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, and the holder of any Right exercises such Right after such record date,
the Company may elect to defer, until the occurrence of such event, the issuance
to such holder of the number of shares of Common Stock and other capital stock
or securities of the Company, if any, issuable upon such exercise over and above
the number of shares of Common Stock and other capital stock or securities of
the Company, if any, issuable upon such exercise on the basis of the Purchase
Price in effect prior to such adjustment; provided, however, that the Company
                                          --------  -------                  
shall deliver to such holder a due bill or other appropriate instrument
evidencing such holder's right to receive such additional shares (fractional or
otherwise) or securities upon the occurrence of the event requiring such
adjustment.

     (m) Anything in this Section 11 to the contrary notwithstanding, the
Company shall be entitled to make such reductions in the Purchase Price, in
addition to those adjustments expressly required by this Section 11, as and to
the extent that in their good faith judgment the Board of Directors of the
Company shall determine to be advisable in order that any (i) consolidation or
subdivision of the Common Stock, (ii) issuance wholly for cash of any shares of
Common Stock at less than the current market price, (iii) issuance wholly for
cash of shares of Common Stock or securities which by their terms are
convertible into or exchangeable for shares of Common 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 Common Stock shall
not be taxable to such shareholders.

                                      -17-
<PAGE>
 
     (n) The Company covenants and agrees that it shall not, at any time after
the Distribution Date, (i) consolidate with any other Person (other than a
Subsidiary of the Company in a transaction which complies with Section 11(o)
hereof), (ii) merge with or into any other Person (other than a Subsidiary of
the Company in a transaction which complies with Section 11(o) hereof), or (iii)
sell or transfer (or permit any Subsidiary to sell or transfer), in one
transaction, or a series of related transactions, assets or earning power
aggregating more than 50% of the assets or earning power of the Company and its
Subsidiaries (taken as a whole) to any other Person or Persons (other than the
Company and/or any of its Subsidiaries in one or more transactions each of which
complies with Section 11(o) hereof), if (x) 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 which would
substantially diminish or otherwise eliminate the benefits intended to be
afforded by the Rights or (y) prior to, simultaneously with or immediately after
such consolidation, merger or sale, the shareholders of the Person who
constitutes, or would constitute, the "Principal Party" for purposes of Section
13(a) hereof shall have received a distribution of Rights previously owned by
such Person or any of its Affiliates and Associates.

     (o) The Company covenants and agrees that, after the Distribution Date, it
will not, except as permitted by Section 23 or Section 26 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
otherwise eliminate the benefits intended to be afforded by the Rights.

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

      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
Common Stock, a copy of such certificate, and (c) mail a brief summary thereof
to each holder of a Rights Certificate (or, if prior to the Distribution Date,
to each holder of a certificate representing shares of Common Stock) 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.

                                      -18-
<PAGE>
 
      Section 13. Consolidation, Merger or Sale or Transfer of Assets or Earning
                  --------------------------------------------------------------
Power.
- ------

     (a) In the event that, following the Stock Acquisition Date, directly or
indirectly, (x) the Company shall consolidate with, or merge with and into, any
other Person (other than a Subsidiary of the Company in a transaction which
complies with Section 11(o) hereof), and the Company shall not be the continuing
or surviving corporation of such consolidation or merger, (y) any Person (other
than a Subsidiary of the Company in a transaction which complies with Section
11(o) hereof) shall consolidate with, or merge 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 (z) except by way of a pro rata distribution to all holders of
Common Stock of the Company, the Company shall sell or otherwise transfer (or
one or more of its Subsidiaries shall sell or otherwise transfer), in one
transaction or a series of related transactions, assets or earning power
aggregating more than 50% of the assets or earning power of the Company and its
Subsidiaries (taken as a whole) to any Person or Persons (other than the Company
or any Subsidiary of the Company in one or more transactions each of which
complies with Section 11(o) hereof), then, and in each such case, proper
provision shall be made so that: (i) 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 then current Purchase Price in accordance with the terms
of this Agreement, such number of validly authorized and issued, fully paid,
nonassessable and freely tradeable shares of Common Stock of the Principal Party
(as such term is hereinafter defined), not subject to any liens, encumbrances,
rights of first refusal or other adverse claims, as shall be equal to the result
obtained by (1) multiplying the then current Purchase Price by the number of
shares of Common Stock for which a Right is exercisable immediately prior to the
first occurrence of a Section 13 Event (or, if a Section 11(a)(ii) Event has
occurred prior to the first occurrence of a Section 13 Event, multiplying the
number of shares for which a Right was exercisable immediately prior to the
first occurrence of a Section 11(a)(ii) Event by the Purchase Price in effect
immediately prior to such first occurrence), and dividing that product (which,
following the first occurrence of a Section 13 Event, shall be referred to as
the "Purchase Price" for each Right and for all purposes of this Agreement) by
(2) 50% of the current market price (determined pursuant to Section 11(d)(i)
hereof) per share of the Common Stock of such Principal Party on the date of
consummation of such Section 13 Event; (ii) such Principal Party shall
thereafter be liable for, and shall assume, by virtue of such Section 13 Event,
all the obligations and duties of the Company pursuant to this Agreement; (iii)
the term "Company" shall thereafter be deemed to refer to such Principal Party,
it being specifically intended that the provisions of Section 11 hereof shall
apply only to such Principal Party following the first occurrence of a Section
13 Event; (iv) such Principal Party shall take such steps (including, but not
limited to, the reservation of a sufficient number of shares of its Common
Stock) in 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; and (v) the provisions
of Section 11(a) (ii) hereof shall be of no effect following the first
occurrence of any Section 13 Event.

                                      -19-
<PAGE>
 
     (b)  "Principal Party" shall mean:

          (i) in the case of any transaction described in clause (x) or (y) 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 (z) 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 (12)
month period registered under Section 12 of the Exchange Act, and such Person is
a direct or indirect Subsidiary or 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 Principal Party shall have a sufficient number of
authorized shares of its Common Stock which have not been issued or reserved for
issuance to permit the exercise in full of the Rights in accordance with this
Section 13 and unless prior thereto the Company and such Principal Party shall
have executed and delivered to the Rights Agent a supplemental agreement
providing for the terms set forth in paragraphs (a) and (b) of this Section 13
and further providing that, as soon as practicable after the date of any
consolidation, merger 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 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 Act) until the Expiration Date; and

          (ii) will deliver to holders of the Rights historical financial
     statements for the Principal Party and each of its Affiliates which 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.  In the event that a Section 13
Event shall occur at any time after the

                                      -20-
<PAGE>
 
occurrence of a Section 11(a)(ii) Event, the Rights which 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, except
prior to the Distribution Date as provided in Section 11(p) hereof, or to
distribute Rights Certificates which evidence fractional Rights.  In lieu of
such fractional Rights, there may be paid to the registered holders of the
Rights 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 prior to the date on which such fractional Rights would have
been otherwise issuable.  The closing price of the Rights for any day shall be
the last sale price, 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 the 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
Common Stock upon exercise of the Rights or to distribute certificates which
evidence fractional shares of Common Stock. In lieu of fractional shares of
Common Stock, the Company may pay to the registered holders of Rights
Certificates at the time such Rights are exercised as herein provided an amount
in cash equal to the same fraction of the current market value of one (1) share
of Common Stock.  For purposes of this Section 14(c), the current market value
of one share of Common Stock shall be the closing price of one share of Common
Stock (as determined pursuant to Section 11(d)(i) hereof) for the Trading Day
immediately prior to 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 permitted by this Section 14.

      Section 15.   Rights of Action.  All rights of action in respect of this
                    ----------------                                          
Agreement are vested in the respective registered holders of the Rights
Certificates (and, prior to the Distribution Date, the registered holders of the
Common Stock); and any registered holder of any Rights Certificate (or, prior to
the Distribution Date, of the Common Stock), without the consent of the Rights
Agent or of the holder of any other Rights Certificate (or, prior to the
Distribution Date, of the Common

                                      -21-
<PAGE>
 
Stock), may, in his own behalf and for his own benefit, enforce, and may
institute and maintain any suit, action or proceeding against the Company to
enforce, or otherwise act in respect of, his right to exercise the Rights
evidenced by such Rights Certificate in the manner provided in such Rights
Certificate and in this Agreement.  Without limiting the foregoing or any
remedies available to the holders of Rights, it is specifically acknowledged
that the holders of Rights would not have an adequate remedy at law for any
breach of this Agreement and shall be entitled to specific performance of the
obligations hereunder and injunctive relief against actual or threatened
violations of the obligations hereunder of any Person subject to this Agreement.

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

     (b) after the Distribution Date, the Rights Certificates are transferable
only on the registry books of the Rights Agent if surrendered at the principal
office or offices of the Rights Agent designated for such purposes, duly
endorsed or accompanied by a proper instrument of transfer and with the
appropriate forms and certificates fully executed;

     (c) subject to Section 6(a) and Section 7(f) hereof, the Company and the
Rights Agent may deem and treat the person in whose name a Rights Certificate
(or, prior to the Distribution Date, the associated Common Stock certificate) is
registered as the absolute owner thereof and of the Rights evidenced thereby
(notwithstanding any notations of ownership or writing on the Rights
Certificates or the associated Common Stock certificate made by anyone other
than the Company or the Rights Agent) for all purposes whatsoever, and neither
the Company nor the Rights Agent, subject to the last sentence of Section 7(e)
hereof, shall be required to be affected by any notice to the contrary; and

     (d) notwithstanding anything in this Agreement to the contrary, neither the
Company nor the Rights Agent shall have any liability to any holder of a Right
or other Person as a result of its inability to perform any of its obligations
under this Agreement by reason of any preliminary or permanent injunction or
other order, decree or ruling issued by a court of competent jurisdiction or by
a governmental, regulatory or administrative agency or commission, or any
statute, rule, regulation or executive order promulgated or enacted by any
governmental authority, prohibiting or otherwise restraining performance of such
obligation; provided, however, the Company must use its best efforts to have any
            --------  -------                                                   
such order, decree or ruling lifted or otherwise overturned as soon as possible.

      Section 17.   Rights Certificate Holder Not Deemed a Stockholder.  No
                    --------------------------------------------------     
holder, as such, of any Rights Certificate shall be entitled to vote, receive
dividends or be deemed for any purpose the holder of shares of Common Stock or
any other securities of the Company which may at any time

                                      -22-
<PAGE>
 
be issuable on the exercise of the Rights represented thereby, nor shall
anything contained herein or in any Rights Certificate be construed to confer
upon the holder of any Rights Certificate, as such, any of the rights of a
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 Rights 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 at the acceptance, exercise or 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, suffered 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 (including
reasonable counsel fees and expenses).

     (b) The Rights Agent shall be protected and shall incur no liability for or
in respect of any action taken, suffered or omitted by it in connection with its
administration of this Agreement in reliance upon any Rights Certificate or
certificate for Common Stock or for other securities of the Company, instrument
of assignment or transfer, power of attorney, endorsement, affidavit, letter,
notice, direction, consent, certificate, statement, or other paper or document
believed by it to be genuine and to be signed, executed and, where necessary,
verified or acknowledged, by the proper Person or Persons.

      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
corporate trust 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. In case at the time such successor Rights Agent shall succeed to the
agency created by this Agreement, any of the Rights Certificates shall have been
countersigned but not delivered, any such successor Rights Agent may adopt the
countersignature of a predecessor Rights Agent and deliver such Rights
Certificates so countersigned; and in case at that time any of the

                                      -23-
<PAGE>
 
Rights Certificates shall not have been countersigned, any successor Rights
Agent may countersign such Rights Certificate either in the name of the
predecessor or in the name of the successor Rights Agent; and in all such cases
such Rights Certificates shall have the full force provided in the Rights
Certificates and in this Agreement.

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

      Section 20.   Duties of Rights Agent.  The Rights Agent undertakes the
                    ----------------------                                  
duties and obligations imposed by this Agreement upon the following terms and
conditions, by all of which the Company and the holders of Rights Certificates,
by their acceptance thereof, shall be bound:

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

     (b) Whenever in the performance of its duties under this Agreement the
Rights Agent shall deem it necessary or desirable that any fact or matter
(including, without limitation, the identity of any Acquiring Person and the
determination of "current market price") be proved or established by the Company
prior to taking, suffering or omitting any action hereunder, such fact or matter
(unless other evidence in respect thereof be herein specifically prescribed) may
be deemed to be conclusively proved and established by a certificate signed by
the President, any Vice President, the Treasurer, any Assistant Treasurer, the
Corporate Secretary or any Assistant Corporate Secretary of the Company and
delivered to the Rights Agent; and such certificate shall be full and complete
authorization to the Rights Agent for any action taken, suffered or omitted 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, the Summary of
Rights or in the Rights Certificates or be required to verify the same (except
as to its countersignature on such Rights 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

                                      -24-
<PAGE>
 
Agent) or in respect of the validity or execution of any Rights Certificate
(except its countersignature thereof); nor shall it be responsible for any
breach by the Company of any covenant or condition contained in this Agreement
or in any Rights Certificate; nor shall it be responsible for any adjustment
required under the provisions of Section 11 or 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 Rights Certificates after actual
notice of any such adjustment); nor shall it by any act hereunder be deemed to
make any representation or warranty as to the authorization or reservation of
any shares of Common Stock or other securities to be issued pursuant to this
Agreement or any Rights Certificate or as to whether any shares of Common Stock
or other securities will, when so issued, be validly authorized and issued,
fully paid and nonassessable.

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

     (g) The Rights Agent is hereby authorized and directed to accept
instructions with respect to the performance of its duties hereunder from the
President, any Vice President, the Corporate 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, suffered or omitted to be taken in good
faith by it under the provisions of this Agreement in reliance upon instructions
of any such officer.

     (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 shall be reasonable grounds for believing that repayment of such funds or
adequate indemnification against such risk or liability is not reasonably
assured to it.

                                      -25-
<PAGE>
 
     (k) If, with respect to any Rights Certificate surrendered to the Rights
Agent for exercise or transfer, the certificate attached to the form of
assignment or form of election to purchase, as the case may be, has either not
been completed or indicates an affirmative response to clause 1 or 2 thereof, or
both, the Rights Agent shall not take any further action with respect to such
requested exercise of transfer without first consulting with the Company.

      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 the
transfer agent of the Common Stock, by registered or certified mail, and to the
holders of the Rights Certificates by first-class mail.  The Company may remove
the Rights Agent or any successor Rights Agent upon thirty (30) days' notice in
writing, mailed to the Rights Agent or successor Rights Agent, as the case may
be, and to the transfer agent of the Common Stock, by registered or certified
mail, and to the holders of the Rights Certificates by first-class mail.  If the
Rights Agent shall resign or be removed or shall otherwise become incapable of
acting, the Company shall appoint a successor to the Rights Agent.  If the
Company shall fail to make such appointment within a period of thirty (30) days
after giving notice of such removal or after it has been notified in writing of
such resignation or incapacity by the resigning or incapacitated Rights Agent or
by the holder of a Rights Certificate (who shall, with such notice, submit his
Rights Certificate for inspection by the Company), then any registered holder of
any Rights Certificate may apply to any court of competent jurisdiction for the
appointment of a new Rights Agent.  Any successor Rights Agent, whether
appointed by the Company or by such a court, shall be a corporation organized
and doing business under the laws of the United States or of the States of Texas
or New York (or of any other state of the United States so long as such
corporation is authorized to do business as a banking institution in the States
of Texas or New York), in good standing, having a principal office in the States
of Texas or New York, which is authorized under such laws to exercise corporate
trust powers and is subject to supervision or examination by federal or state
authority and which has at the time of its appointment as Rights Agent a
combined capital and surplus of at least $100,000,000.  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 the transfer agent of the Common Stock, and mail a notice thereof in writing
to the registered holders of the Rights Certificates.  Failure to give any
notice provided for in this Section 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 Rights Certificates. Notwithstanding any of
                    -----------------------------------                        
the provisions of this Agreement or of the Rights to the contrary, the Company
may, at its option, issue new Rights Certificates evidencing Rights in such form
as may be approved by its Board of Directors to reflect any adjustment or change
in the Purchase Price and the number or kind or class of shares or other

                                      -26-
<PAGE>
 
securities or property purchasable under the Rights Certificates made in
accordance with the provisions of this Agreement.  In addition, in connection
with the issuance or sale of shares of Common Stock following the Distribution
Date and prior to the redemption or expiration of the Rights, the Company (a)
shall, with respect to shares of Common Stock so issued or sold pursuant to the
exercise of stock options or under any employee plan or arrangement in effect or
outstanding on the Distribution Date, or upon the exercise, conversion or
exchange of securities hereinafter issued by the Company, and (b) may, in any
other case, if deemed necessary or appropriate by the Board of Directors of the
Company, issue Rights Certificates representing the appropriate number of Rights
in connection with such issuance or sale; provided, however, that (i) no such
                                          --------  -------                  
Rights Certificates shall be issued if, and to the extent that, the Company
shall be advised by counsel that such issuance would create a significant risk
of material adverse tax consequences to the Company or the Person to whom such
Rights 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.
                    -------------------------- 

     (a) The Board of Directors of the Company may, at its option, at any time
prior to the earlier of (i) the close of business on the fifteenth day following
the Stock Acquisition Date (or, if the Stock Acquisition Date shall have
occurred prior to the Record Date, the close of business on the fifteenth day
following the Record Date), as such date may be extended from time to time (but
in no event for more than a year following the Stock Acquisition Date) by the
Board of Directors while the Rights are still redeemable in accordance with the
terms of this Agreement, or (ii) the Final Expiration Date, redeem all but not
less than all the then outstanding Rights at a redemption price of $.05 per
Right, as such amount may be appropriately adjusted to reflect any stock split,
stock dividend or similar transaction (including the issuance of additional
Rights pursuant to Section 11(i) hereof) occurring after the date hereof (such
redemption price being hereinafter referred to as the "Redemption Price");
provided, however, if the Board of Directors of the Company authorizes
- --------  -------                                                     
redemption of the Rights or the extension of the redemption period in either of
the circumstances set forth in clauses (i) and (ii) below, then there must be
Continuing Directors then in office, such Continuing Directors must then
constitute not less than a majority of the Board of Directors of the Company and
such authorization shall require the concurrence of a majority of such
Continuing Directors: (i) such authorization occurs on or after the time a
Person becomes an Acquiring Person, or (ii) such authorization occurs on or
after the date of a change (resulting from a proxy or consent solicitation) in a
majority of the directors in office at the commencement of such solicitation if
any Person who is a participant in such solicitation has stated (or, if upon the
commencement of such solicitation, a majority of the Board of Directors of the
Company including a majority of the Continuing Directors has determined in good
faith) that such Person (or any of its Affiliates or Associates) intends to
take, or may consider taking, any action which would result in such Person
becoming an Acquiring Person or which would cause the occurrence of a Triggering
Event unless, concurrent with such solicitation, such Person (or one or more of
its Affiliates or Associates) is making a cash tender offer pursuant to a
Schedule 14D-1 (or any successor form) filed with the Securities and Exchange
Commission for all outstanding shares of Common Stock not beneficially

                                      -27-
<PAGE>
 
owned by such Person (or by its Affiliates or Associates); provided, further,
                                                           --------  ------- 
however, that if, following the occurrence of a Stock Acquisition Date and
- --------                                                                  
following the expiration of the right of redemption hereunder but prior to any
Triggering Event, (i) a Person who is an Acquiring Person shall have transferred
or otherwise disposed of a number of shares of Common Stock in one transaction
or a series of transactions not directly or indirectly involving the Company or
any of its Subsidiaries, which did not result in the occurrence of a Triggering
Event such that such Person is thereafter a Beneficial Owner of 10% or less of
the outstanding shares of Common Stock, and (ii) there are no other Persons,
immediately following the occurrence of the event described in clause (i), who
are Acquiring Persons, then the right of redemption shall be reinstated and
thereafter be subject to the provisions of this Section 23.  Notwithstanding
anything contained in this Agreement to the contrary, the Rights shall not be
exercisable after the first occurrence of a Section 11(a)(ii) Event until such
time as the Company's right of redemption hereunder has expired.

     (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 then outstanding Rights 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, prior to the Distribution Date, on the
registry books of the Transfer Agent for the Common Stock. Any notice which is
mailed in the manner herein provided shall be deemed given, whether or not the
holder receives the notice.  Each such notice of redemption will state the
method by which the payment of the Redemption Price will be made.

      Section 24    Notice of Certain Events.
                    ------------------------ 

     (a) In case the Company shall propose, at any time after the Distribution
Date, (i) to pay any dividend payable in stock of any class to the holders of
Common Stock or to make any other distribution to the holders of Common Stock
(other than a regular quarterly dividend out of earnings or retained earnings of
the Company), or (ii) to offer to the holders of Common Stock rights or warrants
to subscribe for or to purchase any additional shares of Common Stock or shares
of stock of any class or any other securities, rights or options, or (iii) to
effect any reclassification of its Common Stock (other than a reclassification
involving only the subdivision of outstanding shares of Common Stock), or (iv)
to effect any consolidation or merger into or with any other Person (other than
a Subsidiary of the Company in a transaction which complies with Section 11(o)
hereof), 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 transaction or a
series of related transactions, of more than 50% of the assets or earning power
of the Company and its Subsidiaries (taken as a whole) to any other Person or
Persons (other than the Company and/or any of its Subsidiaries in one or more
transactions each of which complies with Section 11(o) hereof), or (v) to effect
the liquidation, dissolution or winding up of the Company, then, in each such
case, the Company shall give to each holder of a Rights Certificate, to the
extent feasible and in accordance with Section 25 hereof, a notice of such
proposed

                                      -28-
<PAGE>
 
action, which shall specify the record date for the purposes of such stock
dividend, distribution of rights or warrants, or the date on which such
reclassification, consolidation, merger, sale, transfer, liquidation,
dissolution, or winding up is to take place and the date of participation
therein by the holders of the shares of Common Stock, if any such date is to be
fixed, and such notice shall be so given in the case of any action covered by
clause (i) or (ii) above at least twenty (20) days prior to the record date for
determining holders of the shares of Common Stock for purposes of such action,
and in the case of any such other action, at least twenty (20) days prior to the
date of the taking of such proposed action or the date of participation therein
by the holders of the shares of Common Stock whichever shall be the earlier.

     (b) In case any of the events set forth in Section 11(a)(ii) hereof shall
occur, then, in any such case, the Company shall as soon as practicable
thereafter give to each holder of a Rights Certificate, to the extent feasible
and 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 Rights Certificate
to or on the Company shall be sufficiently given or made if sent by first-class
mail, postage prepaid, addressed (until another address is filed in writing with
the Rights Agent) as follows:

        Lufkin Industries, Inc.
        601 South Raguet
        P. O. Box 849
        Lufkin, Texas 75902-0849
        Attention:  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 Rights
Certificate to or on the Rights Agent shall be sufficiently given or made if
sent by first-class mail, postage prepaid, addressed (until another address is
filed in writing with the Company) as follows:

        Lufkin National Bank
        P. O. Box 789
        Lufkin, Texas 75902-0789
        Attention:  President

Notices or demands authorized by this Agreement to be given or made by the
Company or the Rights Agent to the holder of any Rights Certificate (or, if
prior to the Distribution Date, to the holder of certificates representing
shares of Common Stock) 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.

                                      -29-
<PAGE>
 
      Section 26    Supplements and Amendments.  The Company and the Rights
                    ---------------------------                            
Agent shall, if the Company so directs, supplement or amend this Agreement
without the approval of any holders of Rights Certificates in order (i) to cure
any ambiguity, (ii) to correct or supplement any provision contained herein
which may be defective or inconsistent with any other provisions herein, (iii)
to conform, in the opinion of the Board of Directors, to applicable law, or (iv)
to change or supplement the provisions hereunder in any manner which the Company
may deem necessary or desirable and which shall not adversely affect in any
material respect the interests of the holders of Rights Certificates; provided,
                                                                      -------- 
however, that any supplement or amendment effected on or after the Stock
- -------                                                                 
Acquisition Date must be approved by a majority of the Continuing Directors,
which Continuing Directors shall not constitute less than a majority of the
Board of Directors of the Company. 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; provided, however, that the Rights
                                            --------  -------                 
Agent may, but shall not be obligated to, enter into any such supplement or
amendment which affects the Rights Agent's own rights, duties or immunities
under this Agreement.  Notwithstanding anything contained in this Agreement to
the contrary, no supplement or amendment shall be made which changes any of the
provisions regarding redemption set forth in Section 23, the Final Expiration
Date, the Purchase Price or the number of shares of Common Stock for which a
Right is exercisable. Prior to the Distribution Date, the interests of the
holders of Rights shall be deemed coincident with the interests of the holders
of Common Stock.

      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 respective 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
Common Stock outstanding at any particular time, including for purposes of
determining the particular percentage of such outstanding shares of Common Stock
of which any Person is the Beneficial Owner, shall be made in accordance with
the last sentence of Rule 13d-3(d)(l)(i) of the General Rules and Regulations
under the Exchange Act.  The Board of Directors of the Company (with, where
specifically provided for herein, the concurrence of the Continuing Directors)
shall have the exclusive power and authority to administer this Agreement and to
exercise all rights and powers specifically granted to the Board (with, where
specifically provided for herein, the concurrence of the Continuing Directors)
or to the Company, or as may be necessary or advisable in the administration of
this Agreement, including, without limitation, the right and power to (i)
interpret the provisions of this Agreement, and (ii) make all determinations
deemed necessary or advisable for the administration of this Agreement
(including a determination to redeem or not redeem the Rights or to amend the
Agreement).  All such actions, calculations, interpretations and determinations
(including, for purposes of clause (y) below, all omissions with respect to the
foregoing) which are done or made by the Board (with, where specifically
provided for herein, the concurrence of the Continuing Directors) in good faith,
shall (x) be final, conclusive and binding on the Company, the Rights Agent, the
holders of the Rights and

                                      -30-
<PAGE>
 
all other parties, and (y) not subject the Board or the Continuing Directors to
any liability to the holders of the Rights.

      Section 29.   Benefits of this Ageement.  Nothing in this Agreement shall
                    --------------------------                                 
be construed to give to any Person other than the Company, the Rights Agent and
the registered holders of the Rights Certificates (and, prior to the
Distribution Date, 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 Rights Certificates (and, prior to 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 this Agreement would adversely affect the purpose or
effect of this 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, each Right and each Rights
                    -------------                                            
Certificate issued hereunder shall be deemed to be a contract made under the
laws of the State of Texas and for all purposes shall be governed by and
construed in accordance with the laws of such State applicable to contracts made
and to be performed entirely within such State, except that the rights and
obligations of the Rights Agent shall be governed by the laws of the State of
New York.

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

      Section 33.   Descriptive Heading.  Descriptive headings of the several
                    --------------------                                     
Sections of this Agreement are inserted for convenience only and shall not
control or affect the meaning or construction of any of the provisions hereof.

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

                                      -31-
<PAGE>
 
Attest:                                  LUFKIN INDUSTRIES, INC.

     
By:  /s/ C. James Haley, Jr.             By:  /s/ Douglas V. Smith
     ----------------------------             -----------------------------
     Name:  C. J. Haley, Jr.                  Name: Douglas V. Smith
     Title: Secretary - Treasurer             Title: President



Attest:                                  LUFKIN NATIONAL BANK


By:  /s/ Randy R. Stewart                By:  /s/ Don M. Neill
     ----------------------------             -----------------------------
     Name: Randy R. Stewart                   Name: Don M. Neill
     Title: Senior Vice-President             Title:    President

                                      -32-
<PAGE>
 
                                                                       EXHIBIT A



                          [Form of Rights Certificate]



Certificate No. R-                               __________ Rights


          NOT EXERCISABLE AFTER MAY 31, 2006 OR EARLIER IF REDEEMED BY
          THE COMPANY. THE RIGHTS ARE SUBJECT TO REDEMPTION, AT THE
          OPTION OF THE COMPANY, AT $.05 PER RIGHT ON THE TERMS SET
          FORTH IN THE RIGHTS AGREEMENT. UNDER CERTAIN CIRCUMSTANCES,
          RIGHTS BENEFICIALLY OWNED BY AN ACQUIRING PERSON (AS SUCH
          TERM IS DEFINED IN THE RIGHTS AGREEMENT) AND ANY SUBSEQUENT
          HOLDER OF SUCH RIGHTS MAY BECOME NULL AND VOID. [THE RIGHTS
          REPRESENTED BY THIS RIGHTS 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 RIGHTS CERTIFICATE AND THE
          RIGHTS REPRESENTED HEREBY MAY BECOME NULL AND VOID IN THE
          CIRCUMSTANCES SPECIFIED IN SECTION 7(e) OF SUCH
          AGREEMENT.]/1/


                               Rights 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 May 15, 1996 (the "Rights
Agreement"), between LUFKIN INDUSTRIES, INC., a Texas corporation (the
"Company"), and Lufkin National Bank (the "Rights Agent"), to purchase from the
Company at any time prior to 5:00 P.M. (Houston, Texas time) on May 31, 2006 at
the office or offices of the Rights

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

/1/  The portion of the legend in brackets shall be inserted only if applicable
     and shall replace the preceding sentence.

                                      A-1
<PAGE>
 
Agent designated for such purpose, or its successors as Rights Agent, one share
of Common Stock, $1.00 par value, (the "Common Stock") of the Company, at a
purchase price of $400 per share (the "Purchase Price"), upon presentation and
surrender of this Rights Certificate with the Form of Election to Purchase and
related Certificate duly executed. The Purchase Price shall be paid in cash. The
number of Rights evidenced by this Rights Certificate (and the number of shares
which may be purchased upon exercise thereof) set forth above, and the Purchase
Price per share set forth above, are the number and Purchase Price as of May 31,
1996.

     Upon the occurrence of a Section 11(a)(ii) Event (as such term is defined
in the Rights Agreement), if the Rights evidenced by this Right Certificate are
beneficially owned by (i) an Acquiring Person or an Affiliate or Associate of
any such Acquiring Person (as such terms are defined in the Rights Agreement),
(ii) a transferee of any such Acquiring Person, Associate or Affiliate, or (iii)
under certain circumstances specified in the Rights Agreement, a transferee of a
person who, after such transfer, became an Acquiring Person, such Rights shall
become null and void and no holder hereof shall have any right with respect to
such Rights from and after the occurrence of such Section 11(a)(ii) Event.

     As provided in the Rights Agreement, the Purchase Price and the number and
shares of Common Stock or other securities, which may be purchased upon the
exercise of the Rights evidenced by this Rights Certificate are subject to
modification and adjustment upon the happening of certain events, including
Triggering Events.

     This Rights Certificate is subject to all of the terms, provisions and
conditions of the Rights Agreement which terms, provisions and conditions are
hereby incorporated herein by reference and made a part hereof and to which
Rights Agreement reference is hereby made for a full description of the rights,
limitations of rights, obligations, duties and immunities hereunder of the
Rights Agent, the Company and the holders of the Rights Certificates, which
limitations of rights include the temporary suspension of the exercisability of
such Rights under the specific circumstances set forth in the Rights Agreement.
Copies of the Rights Agreement are on file at the above-mentioned office of the
Rights Agent and are also available upon written request to the Rights Agent.

     This Rights Certificate, with or without other Rights Certificates, upon
surrender at the principal office or offices of the Rights Agent designated for
such purpose, may be exchanged for another Rights Certificate or Rights
Certificates of like tender and date evidencing Rights entitling the holder to
purchase a like aggregate number of shares of Common Stock as the Rights
evidenced by the Rights Certificate or Rights Certificates surrendered shall
have entitled such holder to purchase.  If this Rights Certificate shall be
exercised in part, the holder shall be entitled to receive upon surrender hereof
another Rights Certificate or Rights Certificates for the number of whole Rights
not exercised.

     Subject to the provisions of the Rights Agreement, the Rights evidenced by
this Certificate may be redeemed by the Company at its option at a redemption
price of $.05 per Right at any time prior to the earlier of the close of
business on (i) the fifteenth day following the Stock Acquisition

                                      A-2
<PAGE>
 
Date (as such time period may be extended for a period of up to a year pursuant
to the Rights Agreement), and (ii) the Final Expiration Date.  Under certain
circumstances set forth in the Rights Agreement, the decision to redeem or
extend the period for redemption shall require that not less than a majority of
the Board of Directors consist of Continuing Directors and the concurrence of a
majority of such Continuing Directors. After the expiration of the redemption
period, the Company's right of redemption may be reinstated if an Acquiring
Person reduces his beneficial ownership to 10% or less of the outstanding shares
of Common Stock in a transaction or series of transactions not involving the
Company.

     No fractional shares of Common Stock will be issued upon the exercise of
any Right or Rights evidenced hereby, but in lieu thereof a cash payment will be
made, as provided in the Rights Agreement.

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

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

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


Dated as of ________________, 19___

                                      A-3
<PAGE>
 
Attest:                               LUFKIN INDUSTRIES, INC.

                                      By:
- ------------------------                 --------------------------------
     Secretary                           Title:


Countersigned:



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


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

                                      A-4
<PAGE>
 
                          FORM OF ELECTION TO PURCHASE
                          ----------------------------

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


To:  LUFKIN INDUSTRIES, INC.

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

Please insert social security
or other identifying number


- --------------------------------------------------------------------------------
                        (Please print name and address)


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

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

Please insert social security
or other identifying number


- --------------------------------------------------------------------------------
                        (Please print name and address)

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


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

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


Dated:  _____________________, 19_____


 
                                       ----------------------------------
                                      Signature
Signature Guaranteed:

                                      A-5
<PAGE>
 
                                  Certificate
                                  -----------

     The undersigned hereby certifies by checking the appropriate boxes that:

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

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


Dated:_______________________, 19____           _______________________________
                                                Signature

Signature Guaranteed:


                                     NOTICE
                                     ------

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

                                      A-6
<PAGE>
 
                  [Form of Reverse Side of Rights Certificate]

                               FORM OF ASSIGNMENT
                               ------------------

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


FOR VALUE RECEIVED ____________________________________ hereby sells, assigns

and transfers unto ____________________________________________________________
                          (Please print name and address of transferee)

________________________________________________________________________________

________________________________________________________________________________

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

Dated: ____________,19___


                                              ----------------------------------
                                              Signature

Signature Guaranteed:

                                  Certificates
                                  ------------

     The undersigned hereby certifies by checking the appropriate boxes that:

     1.  this Rights Certificates [ ] is [ ] is not being sold, assigned and
transferred by or on behalf of a Person who is or was an Acquiring Person or an
Affiliate or Associates of any such Acquiring Person (as such terms are defined
pursuant to the Rights Agreement);

                                      A-7
<PAGE>
 
     2.  after due inquiry and to the best knowledge of the undersigned, it [ ]
did [ ] did not acquire the Rights evidenced by this Rights Certificate from any
Person who is, was or subsequently became an Acquiring Person or an Affiliate or
Associate of an Acquiring Person.


Date: _______________, 19__


                                      ----------------------------------------
                                      Signature

Signature Guaranteed:

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

                                      A-8
<PAGE>
 
                                                                       Exhibit B


                            SUMMARY OF COMMON SHARE
                                PURCHASE RIGHTS


     On May 15, 1996, the Board of Directors of Lufkin Industries, Inc., (the
"Company") declared a dividend distribution of one Right for each outstanding
share of Lufkin Common Stock to shareholders of record at the close of business
on May 31, 1996.  Each Right entitles the registered holder to purchase from the
Company one share of Common Stock of the Company, (the "Common Stock") at a
Purchase Price of $75 per share, subject to adjustment. The Purchase Price must
be paid in cash at the time of exercise.  The description and terms of the
Rights are set forth in a Rights Agreement (the "Rights Agreement") between the
Company and Lufkin National Bank, as Rights Agent.

     Initially, the Rights will be attached to all Common Stock certificates
representing shares then outstanding, and no separate Rights Certificates will
be distributed. The Rights will separate from the Common Stock and a
Distribution Date will occur upon the earlier of (i) ten days following a public
announcement that a person or group of affiliated or associated persons (an
"Acquiring Person") has acquired, or obtained the right to acquire, beneficial
ownership of 20% or more of the outstanding shares of Common Stock (the "Stock
Acquisition Date"), or (ii) ten days following the commencement of a tender
offer or exchange offer that would result in a person or group beneficially
owning 30% or more of such outstanding shares of Common Stock.  Until the
Distribution Date, (i) the Rights will be evidenced by the Common Stock
certificates and will be transferred with and only with such Common Stock
certificates, (ii) new Common Stock certificates issued after May 31, 1996 will
contain a notation incorporating the Rights Agreement by reference and (iii) the
surrender for transfer of any certificates for Common Stock outstanding will
also constitute the transfer of the Rights associated with the Common Stock
represented by such certificate.

     The Rights are not exercisable until the Distribution Date and will expire
at the close of business on May 31, 2006, unless earlier redeemed by the Company
as described below.

     As soon as practicable after the Distribution Date, Rights Certificates
will be mailed to holders of record of the Common Stock as of the close of
business on the Distribution Date and, thereafter, the separate Rights
Certificates alone will represent the Rights.  Except as otherwise determined by
the Board of Directors, and except in certain other circumstances specified in
the Rights Agreement, only shares of Common Stock issued prior to the
Distribution Date will be issued with Rights.
<PAGE>
 
     In the event that, at any time following the Distribution Date, (i) the
Company is the surviving corporation in a merger with an Acquiring Person and
its Common Stock is not changed or exchanged, (ii) an Acquiring Person engages
in one or more "self-sealing" transactions as set forth in the Rights Agreement,
or (iii) during such time as there is an Acquiring Person, an event occurs which
results in such Acquiring Person's ownership interest being increased by more
than 1% (e.g., a reverse stock split or recapitalized), each holder of a Right
         ----                                                                 
will thereafter have the right to receive, upon exercise, Common Stock (or, in
certain circumstances, other consideration of the Company) having a value equal
to two times the exercise price of the Right. Notwithstanding any of the
foregoing, following the occurrence of any of the events set forth in this
paragraph, all Rights that are, or (under certain circumstances specified in the
Rights Agreement) were, beneficially owned by any Acquiring Person will be null
and void. However, the right to purchase Common Stock of the Company having a
value equal to two times the exercise price is not exercisable following the
occurrence of either of the events set forth above until such time as the Rights
are no longer redeemable by the Company as set forth below.

     For example, at an exercise price of $75 per Right, each Right not owned by
an Acquiring Person (or by certain related parties) following an event set forth
in the preceding paragraph would entitle its holder to purchase $150 worth of
Common Stock (or other consideration, as noted above) for $75.  Assuming that
the Common Stock had a per share value of $37.50 at such time, the holder of
each valid Right would be entitled to purchase 4 shares of Common Stock for $75.

     In the event that, at any time following the Stock Acquisition Date, (i)
the Company is acquired in a merger or other business combination transaction in
which the Company is not the surviving corporation (other than a merger
described in the second preceding paragraph), or (ii) 50% or more of the
Company's assets or earning power is sold or transferred, each holder of a Right
(except Rights which previously have been voided as set forth above) shall
thereafter have the right to receive, upon exercise, common stock of the
acquiring company having a value equal to two times the exercise price of the
Right.  The events set forth in this paragraph and in the second preceding
paragraph are referred to as the "Triggering Events."

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

     With certain exceptions, no adjustment in the Purchase Price will be
required until cumulative adjustments amount to at least 1% of the Purchase
Price. In addition, to the extent that the Company does not have sufficient
shares of Common Stock issuable upon exercise of the Rights following the
occurrence of a Triggering Event, the Company may, under certain circumstances,

                                      -2-
<PAGE>
 
reduce the Purchase Price. No fractional shares will be issued and, in lieu
thereof, an adjustment in cash will be made based on the market price of the
Common Stock on the last trading day prior to the date of exercise.

     At any time until fifteen days following the Stock Acquisition Date, the
Company may redeem the Rights in whole, but not in part, at a price of $.05 per
Right.  Under certain circumstances set forth in the Rights Agreement, however,
the Rights may only be redeemed if not less than a majority of the Board of
Directors consists of Continuing Directors and majority of such Continuing
Directors concur in the decision to redeem the Rights.  After the redemption
period has expired, the Company's right of redemption may be reinstated if an
Acquiring Person reduces his beneficial ownership to 10% or less of the
outstanding shares of Common Stock in a transaction or series of transactions
not involving the Company. Immediately upon the action of the Board of Directors
ordering redemption of the Rights, the Rights will terminate and the only right
of the holders of Rights will be to receive the $.05 redemption price.

     The term "Continuing Directors" means any member of the Board of Directors
of the Company who was a member of the Board prior to the date of the Rights
Agreement, and any person who is subsequently elected to the Board if such
person is recommended or approved by a majority of the Continuing Directors, but
shall not include an Acquiring Person, or an affiliate or associate of an
Acquiring Person, or any representative of the foregoing entities.

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

     Other than those provisions relating to the principal economic terms of the
Rights, any of the provisions of the Rights Agreement may be amended by the
Board of Directors of the Company prior to the Distribution Date.  After the
Distribution Date, the provisions of the Rights Agreement may be amended by the
Board (in certain circumstances, with the concurrence of the Continuing
Directors) in order to cure any ambiguity, to make changes which do not
adversely affect the interests of holders of Rights (excluding the interests of
any Acquiring Person), or to shorten or lengthen any time period under the
Rights Agreement; provided, however, that no amendment to adjust the time period
                  ---------                                                     
governing redemption shall be made at such time as the Rights are not
redeemable.

     A copy of the Rights Agreement has been filed with the Securities and
Exchange Commission as an Exhibit to a Registration Statement on Form 8-A dated
May 15, 1996.  A copy of the Rights Agreement is available free of charge from
the Rights Agent. This summary description of the Rights does not purport to be
complete and is qualified in its entirety by reference to the Rights Agreement,
which is incorporated herein by reference.

                                      -3-


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