ORBITAL SCIENCES CORP /DE/
8-A12B, 1998-11-02
SEARCH, DETECTION, NAVAGATION, GUIDANCE, AERONAUTICAL SYS
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<PAGE>   1
                       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

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

                          ORBITAL SCIENCES CORPORATION
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

<TABLE>
<S>                                                                        <C>
           DELAWARE                                                        06-1209561
(STATE OR OTHER JURISDICTION OF                                            (I.R.S. EMPLOYER
INCORPORATION OR ORGANIZATION)                                             IDENTIFICATION NO.)
</TABLE>

                                _______________

<TABLE>
<S>                                                                             <C>
    21700 ATLANTIC BOULEVARD
           DULLES, VA                                                             20166
(ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)                                        (ZIP CODE)
</TABLE>



<TABLE>
<S>                                                         <C>
If this form relates to the registration of a               If this form relates to the registration of a
class of securities pursuant to Section 12(b) of            class of securities pursuant to Section 12(g) of
the Exchange Act and is effective pursuant to               the Exchange Act and is effective pursuant to
General Instruction A.(c), check the following              General Instruction A.(d), check the following
box.  [x]                                                   box.  [ ]
</TABLE>

                     Securities Act registration statement
                    file number to which this form relates:
                                    0-18287
                                (if applicable)

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

<TABLE>
<S>                                                                   <C>
            Title of each class                                           Name of each exchange on which
            to be so registered                                           each class is to be registered

    RIGHTS TO PURCHASE SERIES B JUNIOR
      PARTICIPATING PREFERRED STOCK,                                          NEW YORK STOCK EXCHANGE
         $.01 PAR VALUE PER SHARE
</TABLE>


Securities to be registered pursuant to Section 12(g) of the Act:  None

<PAGE>   2

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

                 The Board of Directors of Orbital Sciences Corporation (the
"Company") declared a dividend distribution of one right ("Right") for each
outstanding share of common stock (the "Common Stock") of the Company.  The
distribution is payable to stockholders of record on November 13, 1998.  Each
Right, when exercisable, entitles the registered holder to purchase from the
Company one-one thousandth of a share of Series B Junior Participating
Preferred Stock ("Preferred Stock") at a price of $210 per one-one thousandth
share (the "Purchase Price"), subject to adjustment.  The description and terms
of the Rights are set forth in a Rights Agreement (the "Rights Agreement")
between the Company and BankBoston N.A., as Rights Agent (the "Rights Agent").
                 
                 Initially, the Rights will be attached to all certificates
representing shares of Common Stock then outstanding, and no separate
certificates evidencing the Rights will be distributed.  The Rights will
separate from the Common Stock and a distribution of Rights Certificates (as
defined below) will occur upon the earlier to occur of (i) 10 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 15% or more of the outstanding shares of Common Stock
(the "Stock Acquisition Date") or (ii) 10 business days (or such later date as
the Directors may determine) following the commencement of a tender offer or
exchange offer the consummation of which would result in the beneficial
ownership by a person of 15% or more of the outstanding shares of Common Stock
(the earlier of such dates being called the "Distribution Date").

                 Until the Distribution Date, (i) the Rights will be evidenced
by the Common Stock certificates, and will be transferred with and only with
the Common Stock certificates, (ii) new Common Stock certificates issued after
November 13, 1998, upon transfer or new issuance of the Common Stock 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 October 31, 2008, unless earlier
redeemed or exchanged by the Company as described below.  The Rights will not
be exercisable by a holder in any jurisdiction where the requisite
qualification to the issuance to such holder, or the exercise by such holder,
of the Rights has not been obtained or is not obtainable.

                 As soon as practicable following the Distribution Date,
separate certificates evidencing the Rights ("Rights Certificates") will be
mailed to holders of record of the Common Stock as of the close of business on
the Distribution Date and, thereafter, the separate Rights Certificates alone
will evidence the Rights.

                                      -2-

<PAGE>   3
Except as otherwise determined by the Board of Directors, only shares of Common
Stock issued prior to the Distribution Date will be issued with Rights.

                 In the event that a Person becomes the beneficial owner of 15%
or more of the then outstanding shares of Common Stock, each holder of a Right
will, after the end of a redemption period referred to below, have the right to
exercise the Right by purchasing, for an amount equal to the Purchase Price,
Common Stock (or, in certain circumstances, cash, property or other securities
of the Company) having a value equal to two times such amount.  Notwithstanding
any of the foregoing, following the occurrence 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, Rights are not exercisable following the occurrence 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 a Purchase Price of $210 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
$420 worth of Common Stock (or other consideration, as noted above) for $210.
Assuming that the Common Stock had a per share value of $30 at such time, the
holder of each valid Right would be entitled to purchase fourteen shares of 
Common Stock for $210.

                 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, 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, after the expiration of the redemption period referred to below,
have the right to receive, upon exercise, common stock of the acquiring company
having a value equal to two times the Purchase Price of the Right (e.g., common
stock of the acquiring company having a value of $420 for the $210 Purchase
Price).

                 At any time after a person or group of affiliated or
associated persons becomes an Acquiring Person, the Board of Directors of the
Company may exchange the Rights (other than Rights owned by such person or
group which have become void), in whole or in part, at an exchange ratio of one
share of Common Stock per Right (subject to adjustment).

                 The Purchase Price payable, and the number of one-one
thousandths of a share of Preferred Stock or other securities or property
issuable, upon exercise of the Rights are subject to adjustment from time to
time to prevent dilution under certain circumstances.

                 With certain exceptions, no adjustment in the Purchase Price
will be required until cumulative adjustments require an adjustment of at least
1% in such Purchase Price.  No fractional shares will be issued (other than
fractions which are integral multiples of one-one thousandth of a share of
Preferred Stock) and in lieu

                                      -3-



<PAGE>   4
thereof, an adjustment in cash will be made based on the market price of the
Preferred Stock on the last trading date prior to the date of exercise.

                 In general, the Board of Directors of the Company, may cause
the Company to redeem the Rights in whole, but not in part, at any time during
the period commencing on October 22, 1998, and ending on the tenth day
following the Stock Acquisition Date, as such period may be extended or
shortened by the Board of Directors (the "Redemption Period") at a price of
$0.005 per Right (payable in cash, Common Stock or other consideration deemed
appropriate by the Board of Directors).  Under certain circumstances set forth
in the Rights Agreement, the decision to redeem the Rights will require the
concurrence of the two-thirds of Directors.  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 and there are no other Acquiring Persons.  Immediately upon the
action of the Board of Directors of the Company ordering redemption of the
Rights, the Rights will terminate and the only right of the holders of Rights
will be to receive the $0.005 redemption price.

                 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 subject to federal taxation 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 (other than an increase in the Purchase Price), 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 order to cure
any ambiguity, defect or inconsistency or 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, no amendment to adjust the time period
governing redemption may be made at such time as the Rights are not redeemable.

                 As of October 16, 1998, there were 80,000,000 authorized
shares of Common Stock, of which 36,735,939 shares were issued and outstanding
and 15,735 shares were held in the Company's treasury.  Each share of Common
Stock outstanding on November 13, 1998 will receive one Right.  A total of
80,000 shares of Preferred Stock are 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, or in a manner or on terms not approved by the Board of
Directors.  The Rights, however, should not deter any prospective offeror
willing to negotiate in good faith

                                      -4-




<PAGE>   5
with the Board of Directors.  Nor should the Rights interfere with any merger
or other business combination approved by the Board of Directors.

                 The form of Rights Agreement between the Company and the
Rights Agent specifying the terms of the Rights, is attached hereto as Exhibit
1 and is incorporated herein by reference.  In addition, (1) the Orbital
Sciences Corporation Certificate of Designation, Preferences and Rights of
Series B Junior Participating Preferred Stock (Exhibit A to the Rights
Agreement) and (2) the form of Rights Certificate (Exhibit C to the Rights
Agreement) are attached hereto as Exhibits 2 and 3, respectively, and are
incorporated herein in their entireties 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.

                                      -5-



<PAGE>   6
ITEM 2.  EXHIBITS.

         The following exhibits are filed as part of this Registration
Statement:

<TABLE>
     <S>       <C>
     1.        Rights Agreement dated as of October 22, 1998, between the
               Company and BankBoston, N.A., as Rights Agent.

     2.        Certificate of Designation, Preferences and Rights of Series B
               Junior Participating Preferred Stock.

     3.        Form of Rights Certificate.
</TABLE>

                                      -6-



<PAGE>   7

                                   SIGNATURES

         Pursuant to the requirements of Section 12 of the Securities Exchange
Act of 1934, as amended, the registrant has duly caused this report to be
signed on its behalf by the undersigned hereunto duly authorized.


                            ORBITAL SCIENCES CORPORATION



                                   
                                   
Date:  October 30, 1998     By:     /s/ Jeffrey V. Pirone
                                -----------------------------------------------
                                Name:      Jeffrey V. Pirone
                                Title:     Executive Vice President and
                                           Chief Financial Officer
             

                                      -7-



<PAGE>   8

                                 EXHIBIT INDEX



<TABLE>
<CAPTION>
Exhibit No.             Description
- -----------             -----------
  <S>                   <C>
  1.                    Rights Agreement dated as of October 22, 1998 between the
                        Company and BankBoston, N.A., as Rights Agent.

  2.                    Certificate of Designation, Preferences and Rights of Series B
                        Junior Participating Preferred Stock.

  3.                    Form of Rights Certificate.
</TABLE>

                                      -8-




<PAGE>   1





                          ORBITAL SCIENCES CORPORATION

                                      AND

                                BANKBOSTON, N.A.

                                AS RIGHTS AGENT


                                RIGHTS AGREEMENT

                          DATED AS OF OCTOBER 22, 1998
<PAGE>   2




                               TABLE OF CONTENTS
<TABLE>
<CAPTION>
                                                                                                 Page
                                                                                                 ----
     <S>                                                                                         <C>
     Section 1. Certain Definitions.  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   1
     Section 2. Appointment of Rights Agent.  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     Section 3. Issue of Rights Certificates.   . . . . . . . . . . . . . . . . . . . . . . . .   6
     Section 4. Form of Rights Certificates.  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     Section 5. Countersignature and Registration.  . . . . . . . . . . . . . . . . . . . . . .   9
     Section 6. Transfer, Split Up, Combination and Exchange of Rights Certificates;
            Mutilated, Destroyed, Lost or Stolen Rights Certificates. . . . . . . . . . . . . .   9
     Section 7. Exercise of Rights; Purchase Price; Expiration Date of Rights.  . . . . . . . .   10
     Section 8. Cancellation and Destruction of Rights Certificates.  . . . . . . . . . . . . .   12
     Section 9. Reservation and Availability of Capital Stock.  . . . . . . . . . . . . . . . .   13
     Section 10. Preferred Stock Record Date.   . . . . . . . . . . . . . . . . . . . . . . . .   15
     Section 11. Adjustment of Purchase Price, Number and Kind of Shares or Number of Rights. .   15
     Section 12. Certificate of Adjusted Purchase Price or Number of Shares.  . . . . . . . . .   24
     Section 13. Consolidation, Merger or Sale or Transfer of Assets or Earning Power.  . . . .   24
     Section 14. Fractional Rights and Fractional Shares.   . . . . . . . . . . . . . . . . . .   27
     Section 15. Rights of Action.  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   28
     Section 16. Agreement of Rights Holders.   . . . . . . . . . . . . . . . . . . . . . . . .   29
     Section 17. Rights Certificate Holder Not Deemed a Stockholder.  . . . . . . . . . . . . .   29
     Section 18. Duties of Rights Agent.  . . . . . . . . . . . . . . . . . . . . . . . . . . .   30
     Section 19. Compensation and Indemnification of the Rights Agent.  . . . . . . . . . . . .   32
     Section 20. Merger or Consolidation or Change of Name of Rights Agent.   . . . . . . . . .   33
     Section 21. Change of Rights Agent.  . . . . . . . . . . . . . . . . . . . . . . . . . . .   34
     Section 22. Issuance of New Rights Certificates.   . . . . . . . . . . . . . . . . . . . .   35
     Section 23. Redemption.  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   35
     Section 24. Exchange.  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   36
     Section 25. Notice of Certain Events.  . . . . . . . . . . . . . . . . . . . . . . . . . .   37
     Section 26. Notices.   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   38
     Section 27. Supplements and Amendments.  . . . . . . . . . . . . . . . . . . . . . . . . .   39
     Section 28. Successors.  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   40
     Section 29. Determinations and Actions by the Board, etc.  . . . . . . . . . . . . . . . .   40
     Section 30. Benefits of this Agreement.  . . . . . . . . . . . . . . . . . . . . . . . . .   41
     Section 31. Severability.  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   41
     Section 32. Governing Law.   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   41
     Section 33. Counterparts.  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   41
     Section 34. Descriptive Headings.  . . . . . . . . . . . . . . . . . . . . . . . . . . . .   42
</TABLE>


<PAGE>   3





EXHIBITS

Exhibit A        Certificate of Designation
Exhibit B        Summary of Rights
Exhibit C        Form of Rights Certificate

<PAGE>   4
                                RIGHTS AGREEMENT


                 RIGHTS AGREEMENT, dated as of October 22, 1998 (the 
"Agreement"), between ORBITAL SCIENCES CORPORATION, a Delaware corporation (the
"Company"), and BANKBOSTON, N.A., a national banking association (the "Rights
Agent").

                 WHEREAS, on October 22, 1998 (the "Rights Dividend Declaration
Date"), the Board of Directors of the Company authorized and declared a
dividend of one Right for each share of Common Stock (as hereinafter defined)
of the Company outstanding at the Close of Business (as defined herein) on the
Record Date (as defined herein), and has authorized the issuance of one Right
with respect to each share of Common Stock of the Company issued between the
Record Date (whether originally issued or delivered from the Company's
treasury) and the Distribution Date (as hereinafter defined), each Right
initially representing the right to purchase one-one thousandth of a share of
Series B Junior Participating Preferred Stock of the Company having the rights,
powers and preferences set forth in the form of Certificate of Designation,
Preferences and Rights attached hereto as Exhibit A, upon the terms and subject
to the conditions hereinafter set forth.

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

         SECTION 1.       CERTAIN DEFINITIONS.

                 For purposes of this Agreement, the following terms have the
meanings indicated:

                 (a)    "Acquiring Person" shall mean any Person (as such term
               is hereinafter defined) who or which, together with all
               Affiliates and Associates (as such terms are hereinafter
               defined) of such Person, shall be the Beneficial Owner (as such
               term is hereinafter defined) of 15% or more of the shares of
               Common Stock then outstanding, but shall not include (i) the
               Company, (ii) any Subsidiary of the Company, or (iii) any
               employee benefit plan of the Company or any Subsidiary of the
               Company, or any Person holding shares of Common Stock for or
               pursuant to the terms of any such plan to the extent, and only
               to the extent, of such shares so held.  Notwithstanding the
               foregoing, no Person shall become an "Acquiring Person" as the
               result of an acquisition of shares of Common Stock by the
               Company which, by reducing the number of shares of Common Stock
               outstanding, increases the proportionate number of shares of
               Common Stock beneficially owned by such Person to 15% or more of
               the shares of Common Stock of the





<PAGE>   5
               Company then outstanding; provided, however, that if a Person
               shall become the Beneficial Owner of 15% or more of the Common
               Stock of the Company then outstanding by reason of share
               purchases by the Company and shall, after such share purchases
               by the Company, become the Beneficial Owner of any additional
               shares of Common Stock of the Company, then such Person shall be
               deemed to be an "Acquiring Person" if such Person is then the
               Beneficial Owner of 15% or more of the Common Stock then
               outstanding.  Notwithstanding the foregoing, if the Board of
               Directors of the Company determines in good faith that a Person
               who would otherwise be an "Acquiring Person", as defined
               pursuant to the foregoing provisions of this paragraph (a), has
               become such inadvertently, and such Person divests as promptly
               as practicable a sufficient number of shares of Common Stock so
               that such Person would no longer be an "Acquiring Person", then
               such Person shall not be deemed an "Acquiring Person" for any
               purposes of this Agreement unless and until such Person shall
               again become an "Acquiring Person".

                 (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 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, other rights (other than these
                        Rights), warrants or options, or otherwise; provided,
                        however, that a Person shall not be deemed the
                        "Beneficial Owner" of, or to "beneficially own", (A)
                        securities tendered pursuant to a tender or exchange
                        offer made by or on behalf of such Person or any of
                        such Person's Affiliates or Associates until such
                        tendered securities are accepted for purchase or
                        exchange; or (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 an
                        adjustment made with respect to any Original Rights;

                                      -2-



<PAGE>   6
                                (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 nothing in this paragraph (c) shall
               cause a Person engaged in business as an underwriter of
               securities to be the "Beneficial Owner" of, or to "beneficially
               own," any securities acquired through such Person's
               participation in good faith in a firm commitment underwriting
               until the expiration of forty days after the date of such
               acquisition.

                 (d)    "Board" shall mean the Board of Directors of the
               Company.

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

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

                                      -3-



<PAGE>   7
                 (g)    "Common Stock" when used with reference to the Company
               shall mean the shares of common stock, par value $0.01 per
               share, of the Company.  "Common Stock" when used with reference
               to any Person other than the Company shall mean the class of
               capital stock with the greatest aggregate voting power, or the
               class of equity securities or other equity interests having
               power to control or direct the management, of such Person.

                 (h)    "Company" shall mean Orbital Sciences Corporation, a
               Delaware corporation.

                 (i)    "Distribution Date" shall mean the earlier of (i) the
               Close of Business on the tenth day after the Stock Acquisition
               Date (or, if the tenth day after the Stock Acquisition Date
               occurs before the Record Date, the Close of Business on the
               Record Date), or (ii) the Close of Business on the tenth
               Business Day (or, if such tenth Business Day occurs before the
               Record Date, the Close of Business on the Record Date), or such
               specified or unspecified later date on or after the Record Date
               as may be determined by action of the Board of Directors prior
               to such time as any Person becomes an Acquiring Person, after
               the date that a tender or exchange offer by any Person (other
               than the Company, any Subsidiary of the Company or any employee
               benefit plan of the Company or of any Subsidiary of the Company
               or any Person holding shares of Common Stock for or pursuant to
               the terms of any such plan) is first published or sent or given
               within the meaning of Rule 14d-2(a) of the General Rules and
               Regulations under the Exchange Act, if upon consummation
               thereof, such Person would be the beneficial owner of 15% or
               more of the outstanding shares of Common Stock.

                 (j)    "Exchange Act" shall mean the Securities Exchange Act
               of 1934, as amended, as in effect on the date of this Agreement.

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

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

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

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

                                      -4-



<PAGE>   8
                 (o)    "Preferred Stock" shall mean shares of Series B Junior
               Participating Preferred Stock of the Company.

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

                 (q)    "Purchase Price" shall have the meaning set forth in
               Section 4(a) and 11(a)(ii) hereof.

                 (r)    "Record Date" shall mean the close of business on
               November 13, 1998.

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

                 (t)    "Rights Agent" shall mean BankBoston, N.A., a national
               banking association.

                 (u)    "Rights Certificate" shall have the meaning set forth
               in Section 3(d) hereof.

                 (v)    "Rights Dividend Declaration Date" shall have the
               meaning set forth in the recitals hereof.

                 (w)    "Section 11(a)(ii) Event" shall mean any event
               described in Section 11(a)(ii) hereof.

                 (x)    "Section 13 Event" shall mean any event described in
               clauses (x), (y) or (z) of Section 13(a) hereof.

                 (y)    "Securities Act" shall mean the Securities Act of 1933,
               as amended and as in effect on the date of this Agreement.

                 (z)    "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) of the Exchange Act) by the Company or an
               Acquiring Person that an Acquiring Person has become such.

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

                                      -5-



<PAGE>   9
                 (bb)   "Triggering Event" shall mean any Section 11(a)(ii)
               Event or any Section 13 Event.

         SECTION 2.       APPOINTMENT OF RIGHTS AGENT.

                 The Company hereby appoints the Rights Agent to act as agent
for the Company and the holders of the Rights (who, in accordance with Section
3 hereof, shall prior to the Distribution Date also be the holders of the
Common Stock) in accordance with the terms and conditions hereof, and the
Rights Agent hereby accepts such appointment.  The Company may from time to
time appoint such Co-Rights Agents as it may deem necessary or desirable, upon
ten (10) days' prior written notice to the Rights Agent.  The Rights Agent
shall have no duty to supervise, and shall in no event be liable for, the acts
or omissions of any such Co-Rights Agent.

         SECTION 3.       ISSUE OF RIGHTS CERTIFICATES.

                 (a)    As promptly as practicable following the Record Date,
the Company will send or deliver a copy of a Summary of Rights to Purchase
Preferred Stock, in substantially the form attached hereto as Exhibit B (the
"Summary of Rights"), to each record holder of Common Stock as of the Close of
Business on the Record Date at the address of such holder shown on the records
of the Company.  With respect to certificates for shares of Common Stock
outstanding as of the Record Date, until the Distribution Date, the Rights will
be evidenced by such certificates for the Common Stock and the registered
holders of the Common Stock shall also be the registered holders of the
associated Rights.  Until the Distribution Date (or the earlier Expiration Date
or Final Expiration Date), the transfer of any certificate representing shares
of Common Stock in respect of which Rights have been issued shall also
constitute the transfer of the Rights associated with the shares of Common
Stock represented thereby.

                 (b)    Rights shall be issued in respect of all shares of
Common Stock issued (whether originally issued or from the Company's treasury)
after the Record Date but prior to the earlier of the Distribution Date or the
Expiration Date or the Final Expiration Date.  Rights shall also be issued to
the extent provided in Section 22 in respect of all shares of Common Stock
which are issued (whether originally issued or from the Company's treasury)
after the Distribution Date and prior to the Expiration Date.  Certificates
representing such shares of Common Stock shall also be deemed to be
certificates for Rights, and shall bear the following legend (in addition to
any other legends that may be required):

                 This certificate also evidences and entitles the holder hereof
                 to certain Rights as set forth in a Rights Agreement between
                 Orbital Sciences Corporation (the "Company") and BankBoston,
                 N.A. (the "Rights

                                      -6-



<PAGE>   10
                 Agent") dated as of October 22, 1998 (the "Rights Agreement"),
                 the terms of which are hereby incorporated herein by reference
                 and a copy of which is on file at the principal executive
                 offices of the Company.  Under certain circumstances, as set
                 forth in the Rights Agreement, such Rights will be evidenced
                 by separate certificates and will no longer be evidenced by
                 this certificate.  The Company will mail to the holder of this
                 certificate a copy of the Rights Agreement as in effect on the
                 date of mailing without charge after receipt of a written
                 request therefor.

                 Under certain circumstances set forth in the Rights Agreement,
                 Rights issued to, or held by, any Person who is, was or
                 becomes an Acquiring Person or any Affiliate or Associate
                 thereof (as such terms are defined in the Rights Agreement),
                 whether currently held by or on behalf of such Person or by
                 any subsequent holder, may become null and void.  The Rights
                 shall not be exercisable, and shall be null and void so long
                 as held, by a holder in any jurisdiction where the requisite
                 qualification of the issuance to such holder, or the exercise
                 by such holder, of the Rights in such jurisdiction shall not
                 have been obtained or be obtainable.

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

                 (c)    Until the Distribution Date (i) the Rights will be
evidenced (subject to the provisions of paragraph (a) of this Section 3) by the
certificates for Common Stock registered in the names of the holders thereof
(which certificates for Common Stock shall also be deemed to be Rights
Certificates) and not by separate Rights Certificates, and (ii) the Rights will
be transferable only in connection with the transfer of the underlying shares
of Common Stock (including a transfer to the Company).

                 (d)    As soon as practicable after the Distribution Date, the
Rights Agent upon notification thereof will send by first-class, insured,
postage prepaid mail, to each record holder of Common Stock as of the Close of
Business on the Distribution Date, at the address of such holder shown on the
records of the Company, a rights certificate, in substantially the form of
Exhibit C hereto (the "Rights Certificate"), evidencing one Right for each
share of Common Stock so held, subject to adjustment as provided herein.  In
the event that an adjustment in the number of Rights per share of Common Stock
has been made pursuant to Section 11 hereof, at the time of distribution of the
Rights Certificates, the Company shall make necessary and appropriate rounding
adjustments (in accordance with

                                      -7-



<PAGE>   11
Section 14(a) hereof) so that Rights Certificates representing only whole
numbers of Rights are distributed and cash is paid in lieu of any fractional
Rights.  As of and after the Distribution Date, the Rights will be evidenced
solely by such Rights Certificates.

         SECTION 4.       FORM OF RIGHTS CERTIFICATES.

                 (a)    The Rights Certificates (and the forms of election to
purchase and of assignment to be printed on the reverse thereof) shall be
substantially the same as Exhibit C hereto and may have such marks of
identification or designation and such legends, summaries or endorsements
printed thereon as the Company may deem appropriate, and as are not
inconsistent with the provisions of this Agreement, or as may be required to
comply with any applicable law or with any rule or regulation made pursuant
thereto or with any rule or regulation of any stock exchange on which the
Rights may from time to time be listed, or to conform to usage.  Subject to the
provisions of Section 11 and Section 22 hereof, the Rights Certificates,
whenever issued, shall be dated as of the Record Date, and on their face shall
entitle the holders thereof to purchase such number of one-one thousandths of a
share of Preferred Stock as shall be set forth therein at the price set forth
therein (such exercise price per one-one thousandth of a share, the "Purchase
Price"), but the amount and type of securities purchasable upon 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(d)
or Section 22 hereof that represents Rights beneficially owned by:  (i) an
Acquiring Person or any Associate or Affiliate of an Acquiring Person; (ii) a
transferee of an Acquiring Person (or 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 a majority of the
Directors has determined is part of an agreement, 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

                                      -8-



<PAGE>   12
                 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 Rights Agreement.

         SECTION 5.       COUNTERSIGNATURE AND REGISTRATION.

                 (a)    The Rights Certificates shall be executed on behalf of
the Company by its Chairman of the Board, President or a Vice President and a
Secretary or Assistant Secretary either manually or by facsimile signature, and
have affixed thereto the Company's seal or a facsimile thereof which shall be
attested by the Secretary or an Assistant Secretary of the Company, either
manually or by facsimile signature.  The 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 Certificate may be signed on behalf
of the Company by any person who, at the actual date of the execution of such
Rights Certificate, shall be a proper officer of the Company to sign such
Rights Certificate, although at the date of the execution of this Rights
Agreement any such person was not such an officer.

                 (b)    Following the Distribution Date, the Rights Agent will
keep or cause to be kept, at its principal office or at 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 the Rights Certificates, the number of Rights evidenced on its face
by each of the Rights Certificates and the date of each of the Rights
Certificates.

           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 earlier of
the Expiration Date or Final 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 one-one thousandths of

                                      -9-



<PAGE>   13
a share of Preferred Stock (or following a Triggering Event, Common Stock,
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 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 office of the Rights Agent designated for such purpose.
Neither the Rights Agent nor the Company shall be obligated to take any action
whatsoever with respect to the transfer of any such surrendered Rights
Certificate until the registered holder shall have properly completed and
signed the certificate contained in the form of assignment on the reverse side
of such Rights 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 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, at the Company's
request, reimbursement to the Company and the Rights Agent of all reasonable
expenses incidental thereto, and upon surrender to the Rights Agent and
cancellation of the 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 and properly executed, to the
Rights Agent at the office of the Rights Agent designated for such purpose,
together with payment of the Purchase Price for each one-one thousandth of a
share of Preferred Stock (or other securities, cash or other assets, as the
case may be) as to which the Rights are exercised, at or prior to the earlier
of

                                      -10-



<PAGE>   14
(i) the close of business on October 31, 2008 (the "Final Expiration Date"),
(ii) the time at which the Rights are redeemed as provided in Section 23
hereof, or (iii) the time at which such Rights are exchanged (the "Exchange
Date") as provided in Section 24 hereof (the earliest of (i), (ii) and (iii)
being herein referred to as the "Expiration Date").

                 (b)    Each Right shall entitle the registered holder thereof
to purchase one-one thousandth of a share of Preferred Stock, and the Purchase
Price for each one-one thousandth of a share of Preferred Stock pursuant to the
exercise of a Right shall initially be $210, and shall be subject to adjustment
from time to time as provided in Sections 11 and 13 hereof and shall be payable
in lawful money of the United States of America in accordance with paragraph
(c) below.

                 (c)    Upon receipt of a Rights Certificate representing
exercisable Rights, with the form of election to purchase and the certificate
duly and properly executed, accompanied by payment, with respect to each Right
so exercised, of the Purchase Price per one-one thousandth of a share of
Preferred Stock (or Common Stock, other securities, cash or other assets, as
the case may be) to be purchased and an amount equal to any applicable transfer
tax or governmental charge in cash, or by certified check, cashier's check or
bank draft payable to the order of the Company, the Rights Agent shall, subject
to Section 18(k) hereof, thereupon promptly (i) (A) requisition from any
transfer agent of the shares of Preferred Stock (or make available, if the
Rights Agent is the transfer agent) certificates for the total number of
one-one thousandths of a share of Preferred Stock to be purchased and the
Company hereby irrevocably authorizes its transfer agent to comply with all
such requests, or (B) if the Company shall have elected to deposit the total
number of shares of Preferred Stock issuable upon exercise of the Rights
hereunder with a depositary agent, requisition from the depositary agent
depositary receipts representing such number of one-one thousandths of a share
of Preferred Stock as are to be purchased (in which case certificates for the
shares of Preferred Stock represented by such receipts shall be deposited by
the transfer agent with the depositary agent) and the Company will direct the
depositary to comply with such request, (ii) requisition from the Company the
amount of cash, if any, to be paid in lieu of issuance of fractional shares in
accordance with Section 14, (iii) promptly after receipt of such certificates
or depositary receipts, cause the same to be delivered to or upon the order of
the registered holder of such Rights Certificate, registered in such name or
names as may be designated by such holder and (iv) after receipt thereof,
promptly deliver such cash, if any, to or upon the order of the registered
holder of such Rights Certificate.  In the event that the Company is obligated
to issue other securities (including Common Stock) of the Company, pay cash
and/or distribute other property pursuant to Section 11(a) hereof, the Company
will make all arrangements necessary so that such securities, cash and/or other
property are available for distribution by the Rights Agent, if and when
appropriate.

                                      -11-



<PAGE>   15
                 (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 such Acquiring Person has any continuing agreement,
arrangement or understanding regarding the transferred Rights or (B) a transfer
which a majority of the Directors has determined is part of an agreement,
arrangement or understanding which has as 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.  The Company shall use all reasonable efforts to ensure that the
provisions of this Section 7(e) and Section 4(b) hereof are complied with, but
shall have no liability to any holder of Rights Certificates or other Person as
a result of its failure to make any determinations with respect to an Acquiring
Person or its Affiliates, Associates or transferees hereunder.

                 (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) properly 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 to any of its agents, be delivered to the Rights Agent for
cancellation or in cancelled

                                      -12-



<PAGE>   16
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 provisions of this Rights Agreement.  The Company shall
deliver to the Rights Agent for cancellation and retirement, and the Rights
Agent shall so cancel and retire, any other Rights Certificate purchased or
acquired by the Company otherwise than upon the exercise thereof.  The Rights
Agent shall deliver all 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
Preferred Stock (and following the occurrence of a Triggering Event, out of its
authorized and unissued shares of Common Stock and/or other securities or out
of its authorized and issued shares held in its treasury), the number of shares
of Preferred Stock (and, following the occurrence of a Triggering Event, shares
of Common Stock and/or other securities) 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 the shares of Preferred Stock (and,
following the occurrence of a Triggering Event, Common Stock and/or other
securities) issuable upon the exercise of Rights become 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 this
Agreement, or as soon as is required by law following the Distribution Date, as
the case may be, a registration statement under the Securities 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 Securities Act) until the earlier of (A) the date as of which the Rights
are no longer exercisable for such securities, and (B) the Expiration Date.
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

                                      -13-



<PAGE>   17
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.  In addition, if the Company shall determine that a
registration statement is required following the Distribution Date, the Company
may temporarily suspend the exercisability of the Rights until such time as a
registration statement has been declared effective.  Upon any suspension of
exercisability of Rights referred to in this Section 9(c), 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 and shall be
null and void so long as held by a holder in any jurisdiction where the
requisite qualification to the issuance to such holder, or the exercise by such
holder, of the Rights in such jurisdiction shall not have been obtained or be
obtainable, or the exercise thereof shall not be permitted under applicable law
or a registration statement shall not have been declared effective.

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

                 (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 or of any certificates for a number of one-one thousandths
of a share of Preferred Stock (or Common Stock and/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 or charge 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 certificates for a number of one-one thousandths of a
share of Preferred Stock (or Common Stock and/or other securities, as the case
may be) in a name other than that of the registered holder of the Rights
Certificate evidencing Rights surrendered for exercise or to issue or deliver
any certificates for a number of one-one thousandths of a share of Preferred
Stock (or Common Stock and/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
any such tax or charge shall have been paid (any such tax or charge 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 or
charge is due.

                                      -14-



<PAGE>   18
         SECTION 10.      PREFERRED STOCK RECORD DATE.

                 Each Person in whose name any certificate for a number of
one-one thousandths of a share of Preferred Stock (or Common Stock and/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 fractional
shares of Preferred Stock (or Common Stock and/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 any applicable transfer taxes and
charges) was made; provided, however, that if the date of such surrender and
payment is a date upon which the Preferred Stock (or Common Stock and/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
(fractional or otherwise) on, and such certificate shall be dated, the next
succeeding Business Day on which the Preferred Stock (or Common Stock and/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 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 Preferred Stock payable in
shares of Preferred Stock, (B) subdivide the outstanding Preferred Stock, (C)
combine the outstanding Preferred Stock into a smaller number of shares or (D)
issue any shares of its capital stock in a reclassification of the Preferred
Stock (including any such reclassification in connection with a consolidation
or merger in which the Company is the continuing or surviving corporation),
except as otherwise provided in this Section 11(a) and 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 Preferred Stock or the number and kind of
shares of capital stock issuable on such date, as the case may be, shall be
proportionately adjusted so that the holder of any Right exercised after such
time shall be entitled to receive, upon payment of the aggregate adjusted
Purchase Price then in effect necessary to exercise a Right in full, the

                                      -15-



<PAGE>   19
aggregate number and kind of shares of Preferred Stock or the number and kind
of shares of 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 Preferred Stock
(or other capital stock, as the case may be) transfer books of the Company were
open, such holder would have owned upon such exercise and been entitled to
receive by virtue of such dividend, subdivision, combination, or
reclassification.  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)  Subject to Sections 23 and 24 of this
Agreement, in the event that 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 organized, appointed or established by the
Company for or pursuant to the terms of any such plan), alone or together with
its Affiliates and Associates, shall, at any time after the Rights Dividend
Declaration Date, become an Acquiring Person, unless the event causing such
Person to become an Acquiring Person is a transaction set forth in Section
13(a) hereof, proper provision shall be made so that promptly following the
Redemption Period (as defined in Section 23(a)), 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 and payment of an amount equal to the then
current Purchase Price in accordance with the terms of this Agreement, in lieu
of a number of one-one thousandths of a share of Preferred Stock, such number
of shares of Common Stock of the Company as shall equal the result obtained by
(x) multiplying the then current Purchase Price by the then number of one-one
thousandths of a share of Preferred Stock for which a Right was or would have
been exercisable immediately prior to the first occurrence of a Section
11(a)(ii) Event, whether or not such Right was then exercisable, 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 except to the extent set forth in Section 13 hereof) by 50% of
the current market price per share of Common Stock (determined pursuant to
Section 11(d) hereof) on the date of such first occurrence (such number of
shares, the "Adjustment Shares").

                          (iii)   The Company may at its option substitute for a
share of Common Stock issuable upon the exercise of Rights in accordance with
the foregoing subparagraph (ii) such number or fractions of shares of Preferred
Stock having an aggregate market value equal to the current per share market
price of a share of Common Stock.  In the event that the number of shares of
Common Stock which is authorized by the Company's Certificate of Incorporation,
but not outstanding, or reserved for issuance for purposes other than upon
exercise of the Rights, is not sufficient to permit the exercise in full of the
Rights in accordance with the foregoing subparagraph (ii), the Board shall, to
the extent permitted by applicable law and by material agreements then in
effect to which the Company is a

                                      -16-



<PAGE>   20
party, (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, the "Spread"), and (B) with respect to each Right
(subject to Section 7(e) hereof), make adequate provision to substitute for
some or all of the Adjustment Shares, upon exercise of a Right and payment of
the applicable Purchase Price, (1) cash, (2) a reduction in the Purchase Price,
(3) Common Stock or other equity securities of the Company (including, without
limitation, shares, or units of shares, of Preferred Stock which the Board has
deemed to have the same value as shares of Common Stock) (such shares of equity
securities being herein called "common stock equivalents"), (4) debt securities
of the Company, (5) other assets, or (6) any combination of the foregoing,
having an aggregate value equal to the Current Value, where such aggregate
value has been determined by the Board based upon the advice of an investment
banking firm selected by the Board; provided, however, if the Company shall not
have made adequate provision to deliver value pursuant to clause (B) above
within thirty (30) days 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"), then the Company
shall be obligated to deliver, upon the surrender for exercise of a Right and
without requiring payment of the Purchase Price, shares of Common Stock (to the
extent available) and then, if necessary, cash, which shares and/or cash have
an aggregate value equal to the Spread.

                 If, upon the occurrence of a Section 11(a)(ii) Event, the
Board shall determine in good faith that it is likely that sufficient
additional shares of Common Stock could be authorized for issuance upon
exercise in full of the Rights, then if the Board so elects, the thirty (30)
day period set forth above may be extended 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 stockholder approval for the authorization of such
additional shares (such period, as it may be extended, the "Substitution
Period").  To the extent that action is to be taken pursuant to the preceding
provisions of this Section 11(a)(iii), 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 and/or to decide the appropriate form of distribution to be
made pursuant to the first sentence of this Section 11(a)(iii) and to determine
the value thereof.  In the event of any such suspension, the Company shall
issue a public announcement stating that the exercisability of the Rights has
been temporarily suspended, as well as a public announcement at such time as
the suspension is no longer in effect.  For purposes of this Section
11(a)(iii), the value of the Common Stock shall be the current market price (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.  The Board may, but shall not be required to, establish

                                      -17-



<PAGE>   21
procedures to allocate the right to receive shares of Common Stock upon the
exercise of the Rights among holders of Rights pursuant to this Section
11(a)(iii).

                 (b)    In case the Company shall fix a record date for the
issuance of rights, options or warrants to all holders of Preferred Stock
entitling them (for a period expiring within forty-five (45) calendar days
after such record date) to subscribe for or purchase Preferred Stock (or shares
having the same rights, privileges and preferences as the shares of Preferred
Stock ("equivalent preferred stock") or securities convertible into Preferred
Stock at a price per share of Preferred Stock or per share of "equivalent
preferred stock" (or having a conversion price per share of Preferred Stock, if
a security convertible into Preferred Stock) less than the current per share
market price of the Preferred Stock (as defined in Section 11(d) hereof) on
such record date, the Purchase Price to be in effect after such record date
shall be determined by multiplying the Purchase Price in effect immediately
prior to such record date by a fraction, the numerator of which shall be the
number of shares of Preferred Stock outstanding on such record date, plus the
number of shares of Preferred Stock which the aggregate offering price of the
total number of shares of Preferred Stock and/or equivalent preferred stock so
to be offered (and/or the aggregate initial conversion price of the convertible
securities so to be offered) would purchase at such current market price, and
the denominator of which shall be the number of shares of Preferred Stock
outstanding on such record date, plus the number of additional shares of
Preferred Stock and/or equivalent preferred stock to be offered for
subscription or purchase (or into which the convertible securities so to be
offered are initially convertible).  In case such subscription price may be
paid in a consideration part or all of which shall be in a form other than
cash, the value of such consideration shall be as determined in good faith by
the Board, whose determination shall be described in a statement filed with the
Rights Agent and shall be conclusive for all purposes.  Shares of Preferred
Stock owned by or held for the account of the Company shall not be deemed
outstanding for the purpose of any such computation.  Such adjustment shall be
made successively whenever such a record date is fixed; and in the event that
such rights or warrants are not so issued, the Purchase Price shall be adjusted
to be the Purchase Price which would then be in effect if such record date had
not been fixed.

                 (c)    In case the Company shall fix a record date for a
distribution to all holders of Preferred Stock (including any such distribution
made in connection with a consolidation or merger in which the Company is the
continuing or surviving corporation) of evidences of indebtedness, cash (other
than a regular quarterly cash dividend out of the earnings or retained earnings
of the Company), assets (other than a dividend payable in Preferred Stock, but
including any dividend payable in stock other than Preferred Stock), or
subscription rights or warrants (excluding those referred to in Section 11(b)
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 per
share market price of the Preferred Stock (as defined in

                                      -18-



<PAGE>   22

Section 11(d) hereof) on such record date, less the fair market value (as
determined in good faith by the Board, whose determination shall be described
in a statement filed with the Rights Agent and shall be conclusive for all
purposes) of the portion of the cash, assets or evidences of indebtedness so to
be distributed or of such subscription rights or warrants applicable to a share
of Preferred Stock and the denominator of which shall be such current per share
market price of the Preferred Stock.  Such adjustment shall be made
successively whenever such a record date is fixed; and in the event that such
distribution is not so made, the Purchase Price shall again be adjusted to be
the Purchase Price which would then be in effect if such record date had not
been fixed.

                        (d)              (i) For the purpose of any computation
hereunder, the "current market price" of the 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 30 consecutive Trading Days (as such term is hereinafter defined)
immediately prior to but not including 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 Common Stock for the ten (10)
consecutive Trading Days immediately following but not including such date;
provided, however, that in the event that the current market price of the
Common Stock is determined during a period following the announcement by the
issuer of such Common Stock of (i) a dividend or distribution on such Common
Stock payable in shares of such Common Stock or securities convertible into
such Common Stock (other than the Rights), or (ii) 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 appropriately adjusted to
take into account ex-dividend trading.  The closing price for each day shall be
the last sale price, regular way, or, in case no such sale takes place on such
day, the average of the closing bid and asked prices, regular way, in either
case as reported in the principal consolidated transaction reporting system
with respect to securities listed or admitted to trading on the New York Stock
Exchange or, if the shares of Common Stock are not listed or admitted to
trading on the New York Stock Exchange, as reported in the principal
consolidated transaction reporting system with respect to securities listed on
the principal national securities exchange on which the shares of Common Stock
are listed or  admitted to trading or, if the shares of Common Stock are not
listed or admitted to trading on any national securities exchange, the last
quoted price or, if not so quoted, the average of the high bid and low asked
prices in the over-the-counter market, as reported by the National Association
of Securities Dealers, Inc. Automated Quotations 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

                                    - 19 -
<PAGE>   23
professional market maker making a market in the shares of Common Stock
selected by the Board.

                        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 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, the term "Trading Day" shall mean
a Monday, Tuesday, Wednesday, Thursday or Friday on which banking or trust
institutions in the State of New York are not authorized or obligated by law or
executive order to close.  If the Common Stock is not publicly held or not
listed or traded, "current market price" shall mean the fair value per share as
determined in good faith by the Board, whose determination shall be described
in a statement filed with the Rights Agent and shall be conclusive for all
purposes.

                                        (ii)      For the purpose of any
computation hereunder, the "current market price" per share of Preferred Stock
shall be determined in the same manner as set forth above for the Common Stock
in clause (i) of this Section 11(d) (other than the last sentence thereof).  If
the current market price per share of Preferred Stock cannot be determined in
the manner provided above or if the Preferred Stock is not publicly held or
listed or traded in a manner described in clause (i) of this Section 11(d), the
"current market price" per share of Preferred Stock shall be conclusively
deemed to be an amount equal to 1,000 (as such number may be appropriately
adjusted for such events as stock splits, stock dividends and recapitalizations
with respect to the Common Stock occurring after the date of this Agreement)
multiplied by the current market price per share of the Common Stock.  If
neither the Common Stock nor the Preferred Stock is publicly held or so listed
or traded, "current market price" per share of the Preferred Stock shall mean
the fair value per share as determined in good faith by the Board, whose
determination shall be described in a statement filed with the Rights Agent and
shall be conclusive for all purposes.  For all purposes of this Agreement, the
"current market price" of one-one thousandth of a share of Preferred Stock
shall be equal to the "current market price" of one share of Preferred Stock
divided by 1,000.

                        (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 such 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 or one-millionth of a share of
Preferred Stock, as the case may be.  Notwithstanding the first sentence of
this Section 11(e), an adjustment required by this Section 11





                                     - 20 -
<PAGE>   24
shall be made no later than the earlier of (i) three years from the date of the
transaction which requires 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 of the Company other than Preferred Stock, thereafter the number of such
other shares so receivable upon exercise of any Right and the Purchase Price
thereof shall be subject to adjustment from time to time in a manner and on
terms as nearly equivalent as practicable to the provisions with respect to the
Preferred Stock contained in Sections 11(a), (b), (c), (e), (g), (h), (i), (j),
(k) and (m), and the provisions of Sections 7, 9, 10, 13 and 14 hereof with
respect to the Preferred Stock shall apply on like terms to any such other
shares.

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

                        (h)              Unless the Company shall have
exercised its election as provided in Section 11(i), upon each adjustment of
the Purchase Price as a result of the calculations made in Sections 11(b) and
(c), each Right outstanding immediately prior to the making of such adjustment
shall thereafter evidence the right to purchase, at the adjusted Purchase
Price, that number of one-one thousandths of a share of Preferred Stock
(calculated to the nearest one-millionth) obtained by (i) multiplying (x) the
number of one-one thousandths of a share 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 one-one thousandths of a share of
Preferred Stock issuable upon the exercise of a Right.  Each of the Rights
outstanding after such adjustment of the number of Rights shall be exercisable
for the number of one-one  thousandths of a share of Preferred Stock for which
a Right was exercisable immediately prior to such adjustment.  Each Right held
of record prior to such adjustment of the number of Rights shall become that
number of Rights (calculated to the nearest ten-thousandth) obtained by
dividing the Purchase Price in effect immediately prior to adjustment of the
Purchase Price by the Purchase Price in effect immediately after adjustment of
the Purchase Price.  The Company shall make a public announcement of its
election to adjust the number of Rights, indicating the record date for the
adjustment, and, if known at the time, the amount of the adjustment to be made.
This record date may be the date on which the Purchase Price is adjusted





                                     - 21 -
<PAGE>   25
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 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 one-one thousandths of a share of
Preferred Stock issuable upon the exercise of the Rights, the Rights
Certificates theretofore and thereafter issued may continue to express the
Purchase Price per one-one thousandth of a share and the number of one-one
thousandths of a share 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-par value, if
any, of the number of one-one thousandths of a share of Preferred 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 non-assessable such number
of one-one thousandths of a share of Preferred Stock at such adjusted Purchase
Price.

                        (l)              In any case in which this Section 11
shall require that an adjustment in the Purchase Price be made effective as of
a record date for a specified event, the Company may elect to  defer until the
occurrence of such event the issuance to the holder of any Right exercised
after such record date the number of one-one thousandths of a share of
Preferred Stock and other capital stock or securities of the Company, if any,
issuable upon such exercise over and above the number of one-one thousandths of
a share of Preferred Stock and other capital stock or securities of the
Company, if any, issuable upon such exercise on the basis of the Purchase Price
in effect prior to such adjustment; provided, however, that the Company shall
deliver to such holder a due bill or other appropriate instrument evidencing
such holder s right to receive such additional shares upon the occurrence of
the event requiring such adjustment.





                                     - 22 -
<PAGE>   26
                        (m)              Anything in this Section 11 to the
contrary notwithstanding, the Company shall be entitled to make such reductions
in the Purchase Price, in addition to those adjustments expressly required by
this Section 11, as and to the extent that it in its sole discretion shall
determine to be advisable in order that any (i) consolidation or subdivision of
the Preferred Stock, (ii) issuance wholly for cash of any shares of Preferred
Stock at less than the current market price, (iii) issuance wholly for cash of
shares of Preferred Stock or securities which by their terms are convertible
into or exchangeable for Preferred Stock, (iv) stock dividends or (v) issuance
of rights, options or warrants referred to hereinabove in this Section 11,
hereafter made by the Company to holders of its Preferred Stock shall not be
taxable to such stockholders.

                        (n)              The Company covenants and agrees that
it shall not, at any time after the Distribution Date, (i) consolidate with any
other Person (other than a Subsidiary of the Company 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 stockholders of the Person who constitutes, or would constitute, the
"Principal Party" for purposes of Section 13(a) hereof shall have received a
distribution of Rights previously owned by such Person or any of its Affiliates
and Associates.

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





                                     - 23 -
<PAGE>   27
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 Sections
11 or 13 hereof, the Company shall (a) promptly prepare a certificate setting
forth such adjustment, and a brief statement of the facts and computations
accounting for such adjustment, (b) promptly file with the Rights Agent and
with each transfer agent for the Preferred Stock and the Common Stock a copy of
such certificate and (c) mail or deliver 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 and shall not be
deemed to have knowledge of any adjustment unless and until it shall have
received such certificate.


       SECTION 13.      CONSOLIDATION, MERGER OR SALE OR TRANSFER OF ASSETS OR
                        EARNING POWER.

                        (a)              Subject to Section 23 of this
Agreement, 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) 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





                                     - 24 -
<PAGE>   28
holder of a Right, except as provided in Section 7(e) hereof, shall, upon the
expiration of the Redemption Period (as defined in Section 23(a)), 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, non-assessable and freely tradable
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 one-one
thousandths of a share of Preferred Stock for which a Right was 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 one-one thousandths of a share of Preferred
Stock 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 (2) dividing that product
(which product, 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 50% of the current market price per share of the shares of Common
Stock of such Principal Party on the date of consummation of such Section 13
Event (or the fair market value on such date of other securities or property of
the Principal Party, as provided for herein); (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 (other
than Sections 11(a)(ii) and 11(a)(iii)) 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) and
Section 11(a)(iii) hereof shall be of no effect following the first occurrence
of any Section 13 Event.

                        (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





                                     - 25 -
<PAGE>   29
                        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 of another Person the Common
Stock of which is and has been so registered, "Principal Party" shall refer to
such other Person; and (2) in case such Person is a Subsidiary, directly or
indirectly, of more than one Person, the Common Stocks of two or more of which
are and have been so registered, "Principal Party" shall refer to whichever of
such Persons is the issuer of the Common Stock having the greatest aggregate
market value.

                        (c)              The Company shall not consummate any
Section 13 Event 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 such
Section 13 Event, the Principal Party will:

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

                                        (ii)  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 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) hereof.





                                     - 26 -
<PAGE>   30

       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 shall 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 the whole Right.  For the purposes
of this Section 14(a), the current market value of a whole Right shall be the
closing price of the Rights for the Trading Day immediately prior to the date
on which such fractional Rights would have been otherwise issuable.  The
closing price for any day shall be the last sale price, or, in case no such
sale takes place on such day, the average of the high bid and low asked prices,
in either case as reported by the New York Stock Exchange or, if the Rights are
not listed or admitted to trading on the New York Stock Exchange, as reported
in the principal consolidated transaction reporting system with respect to
securities listed on the principal national securities exchange on which the
Rights are listed or admitted to trading, or 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.  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 shall be
used.  In the event the Rights are listed or admitted to trading on a national
securities exchange, the closing price for any day shall be the last sale
price, regular way, or, in case no such sale takes place on such day, the
average of the high bid and low asked prices, regular way, in either case as
reported in the principal consolidated transaction reporting system with
respect to the national securities exchange on which the Rights are listed or
admitted to trading.

                        (b)              The Company shall not be required to
issue fractions of shares of Preferred Stock (other than fractions which are
integral multiples of one-one thousandth of a share of Preferred Stock) upon
exercise of the Rights or to distribute certificates which evidence fractional
shares of Preferred Stock (other than fractions which are integral multiples of
one-one  thousandth of a share of Preferred Stock).  In lieu of fractional
shares of Preferred Stock that are not integral multiples of one-one thousandth
of a share of Preferred Stock, the Company may pay to the registered holders of
Rights Certificates at the time such Rights are exercised as herein provided an
amount in cash equal to the same fraction of the current market value of
one-one thousandth of a share of Preferred Stock.  For purposes of this Section
14(b), the current market value of one-one thousandth of a share of Preferred
Stock shall be one-one thousandth of the closing price of a share of Preferred
Stock (as determined pursuant to Section 11(d)(ii) hereof) for the Trading Day
immediately prior to the date of such exercise.





                                     - 27 -
<PAGE>   31
                        (c)              Following the occurrence of one of the
events specified in Section 11 giving rise to the right to receive Common
Stock, common stock equivalents or other securities upon the exercise of a
Right, the Company shall not be required to issue fractions of shares of Common
Stock, common stock equivalents or other securities upon exercise of the Rights
or to distribute certificates which evidence fractional shares of Common Stock,
common stock equivalents or other securities.  In lieu of fractional shares of
Common Stock, common stock equivalents or other securities the Company may pay
to the registered holders of Rights Certificates at the time such Rights are
exercised as herein provided an amount in cash equal to the same fraction of
the current market value of one (1) share of Common Stock, common stock
equivalents or other securities.  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.

                        (d)              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,
except the rights of action vested in the Rights Agent pursuant to Section 18
and Section 19 hereof, are vested in the respective registered holders of the
Rights Certificates (and, prior to the Distribution Date, the registered
holders of the Common Stock); and any registered holder of any Rights
Certificate (or, prior to the Distribution Date, of the Common Stock), without
the consent of the Rights Agent or of the holder of any other Rights
Certificate (or, prior to the Distribution Date, of the Common Stock), may, in
his own behalf and for his own benefit, enforce, and may institute and maintain
any suit, action or proceeding against the Company to enforce, or otherwise act
in respect of, his right to exercise the Rights evidenced by such Rights
Certificate in the manner provided in such Rights Certificate and in this
Agreement.  Without limiting the foregoing or any remedies available to the
holders of Rights, it is specifically acknowledged that the holders of Rights
would not have an  adequate remedy at law for any breach of this Agreement and
will be entitled to specific performance of the obligations under, and
injunctive relief against actual or threatened violations of, the obligations
hereunder of any Person subject to this Agreement.





                                     - 28 -
<PAGE>   32
       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 the 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 office of the Rights Agent designated for such
purposes, duly endorsed or accompanied by a proper instrument of transfer and
with the appropriate form of assignment and the certificate contained therein
duly completed and 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 the 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 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, judgment or
ruling (whether interlocutory or final) 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 government 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
the Preferred Stock or any other securities of the Company which may at any
time be issuable on the exercise of the  Rights represented thereby, nor shall
anything contained herein or in any Rights Certificate be construed to confer
upon the holder of any Rights





                                     - 29 -
<PAGE>   33
Certificate, as such, any of the rights of a stockholder of the Company or any
right to vote for the election of directors or upon any matter submitted to
stockholders at any meeting thereof, or to give or withhold consent to any
corporate action, or to receive notice of meetings or other actions affecting
stockholders (except as provided in Section 25 hereof), or to receive dividends
or subscription rights, or otherwise, until the Right or Rights evidenced by
such Rights Certificate shall have been exercised in accordance with the
provisions hereof.


       SECTION 18.      DUTIES OF RIGHTS AGENT.

                        The Rights Agent undertakes only the duties and
obligations expressly 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 advice or
opinion of such counsel shall be full and complete authorization and protection
to the Rights Agent, and the Rights Agent shall incur no liability, for or in
respect of any action taken or omitted by it in good faith and in accordance
with such advice or opinion.

                        (b)              Whenever in the performance of its
duties under this Agreement the Rights Agent shall deem it necessary or
desirable that any fact or matter (including, without limitation, the identity
of any Acquiring Person and the determination of "current market price") be
proved or established by the Company prior to taking or suffering or omitting
to take 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 any person
believed by the Rights Agent to be any one of the Chairman of the Board,
President, Vice President, Secretary or Assistant Secretary of the Company and
delivered to the Rights Agent; and such certificate shall be full authorization
to the Rights Agent, and the Rights Agent shall incur no liability, for or in
respect of any action taken, omitted or suffered in good faith by it under the
provisions of this Agreement in reliance upon such certificate.

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

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





                                     - 30 -
<PAGE>   34

                        (e)              The Rights Agent is serving as an
administrative agent and shall not be under any responsibility in respect of,
the validity of any provision of this Agreement or the execution and delivery
of this Agreement (except the due execution hereof by the Rights Agent) or in
respect of the validity or execution of any Rights Certificate (except its
countersignature thereof); nor shall it be responsible for any breach by the
Company of any covenant or condition contained in this Agreement or in any
Rights Certificate; nor shall it be responsible for any change in the
exercisability of the Rights (including the Rights becoming null and void
pursuant to Section 7(e) hereof) or any adjustment required under any of the
provisions 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 shares of
Preferred Stock to be issued pursuant to this Agreement or any Rights
Certificate or as to whether any shares of Common Stock or shares of Preferred
Stock will, when so issued, be validly authorized and issued, fully paid and
non-assessable.

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

                        (g)              The Rights Agent is hereby authorized
and directed to accept instructions with respect to the performance of its
duties hereunder from any person believed by the Rights Agent to be any one of
the Chairman of the Board, President, Vice President, Secretary or Assistant
Secretary 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, omitted to be taken or suffered to be taken by it in good faith
in accordance with instructions of any such officer.  Any application by the
Rights Agent for written instructions from the Company may, at the option of
the Rights Agent, set forth in writing any action proposed to be taken,
suffered or omitted by the Rights Agent under this Rights Agreement and the
date on or after which such action shall be taken or suffered or such omission
shall be effective.  The Rights Agent shall not be liable for any action taken
or suffered by, or omission of, the Rights Agent in accordance with a proposal
included in any such application on or after the date specified in such
application (which date shall not be less than five Business Days after the
date any officer of the Company actually receives such application, unless any
such officer shall have consented in writing to an earlier date) unless, prior
to taking any such action (or the effective date in the case of an  omission),
the Rights Agent shall have received written instruction in response to such
application specifying the action to be taken, suffered or omitted.





                                     - 31 -
<PAGE>   35
                        (h)              The Rights Agent and any stockholder,
affiliate, 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 Person or 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, the Rights Agent was not grossly negligent 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.

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

                        (l)              The Rights Agent undertakes only the
express duties and obligations imposed on it by this Agreement and no implied
duties or obligations shall be read into this Agreement against the Rights
Agent.

       SECTION 19.      COMPENSATION AND INDEMNIFICATION OF THE RIGHTS AGENT.

                        (a)              The Company agrees to pay to the
Rights Agent reasonable compensation for all services rendered by it hereunder
and, from time to time, on demand of the Rights Agent, its reasonable expenses
and counsel fees and other disbursements incurred in the administration and
execution of this Agreement and the exercise and performance of its duties
hereunder.  The Company also agrees to indemnify the Rights Agent, its
officers,  employees, agents and directors for, and to hold each of them
harmless against, any loss, liability, or expense, incurred without gross
negligence, bad faith or willful misconduct on the part of the Rights Agent,
for any action taken, suffered or omitted by the Rights Agent or such other
indemnified





                                     - 32 -
<PAGE>   36
party in connection with the acceptance and administration of this Agreement
and the exercise of its duties hereunder, including but not limited to the
costs and expenses of defending against any claim of liability in the premises.
The indemnity provided for hereunder shall survive the expiration of the Rights
and the termination of this Agreement.

                        (b)              The Rights Agent shall be authorized
and 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 or the exercise of its duties hereunder 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.

                        (c)              Anything in this Agreement to the
contrary notwithstanding, in no event shall the Rights Agent be liable for
special, indirect or consequential loss or damage of any kind whatsoever
(including but not limited to lost profits), even if the Rights Agent has been
advised of the likelihood of such loss or damage and regardless of the form of
the action unless such loss or damage results from the gross negligence, bad
faith or willful misconduct of the Rights Agent.


SECTION 20.    MERGER OR CONSOLIDATION OR CHANGE OF NAME OF RIGHTS AGENT.

                        (a)              Any Person into which the Rights Agent
or any successor Rights Agent may be merged or with which it may be
consolidated, or any Person resulting from any merger or consolidation to which
the Rights Agent or any successor Rights Agent shall be a party, or any Person
succeeding to the shareholder services business of the Rights Agent or any
successor Rights Agent, shall be the successor to the Rights Agent under this
Agreement without the execution or filing of any paper or any further act on
the part of any of the parties hereto; provided, however, that such Person
would be eligible for appointment as a successor Rights Agent under the
provisions of Section 21 hereof.

                        (b)              In case at any time the name of the
Rights Agent shall be changed and at any 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.





                                     - 33 -
<PAGE>   37
       SECTION 21.      CHANGE OF RIGHTS AGENT.

                        (a)              The Rights Agent or any successor 

Rights Agent may resign  and be discharged from its duties under this
Agreement upon thirty (30) days' notice in writing mailed to the Company and
to each transfer agent of the Common Stock and the Preferred 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 each transfer agent
of the Common Stock and Preferred Stock by registered or certified mail, and to
the holders of the Rights Certificates by first-class mail.  If the Rights
Agent shall resign or be removed or shall otherwise become incapable of acting,
the Company shall appoint a successor to the Rights Agent.  If the Company
shall fail to make such appointment within a period of thirty (30) days after
giving notice of such removal or after it has been notified in writing of such
resignation or incapacity by the resigning or incapacitated Rights Agent or by
the holder of a Rights Certificate (who shall, with such notice, submit his
Rights Certificate for inspection by the Company), then the registered holder
of any Rights Certificate may apply to any court of competent jurisdiction for
the appointment of a new Rights Agent.  Any successor Rights Agent, whether
appointed by the Company or by such a court, shall be (i) a Person organized
and doing business under the laws of the United States or the Commonwealth of
Massachusetts or the State of New York (or of any other state of the United
States so long as such Person is authorized to do business in the Commonwealth
of Massachusetts or the State of New York), in good standing, having an office
in the Commonwealth of Massachusetts or the State of New York which is
authorized under such laws to exercise corporate trust power and is subject to
supervision or examination by federal or state authority and which has at the
time of its appointment as Rights Agent a combined capital and surplus of at
least $50 million or (ii) an affiliate of such a Person.  After appointment,
the successor Rights Agent shall be vested with the same powers, rights, duties
and responsibilities as if it had been originally named as Rights Agent without
further act or deed; but the predecessor Rights Agent shall deliver and
transfer to the successor Rights Agent any property at the time held by it
hereunder, and execute and deliver any further assurance, conveyance, act or
deed necessary for the purpose.  Not later than the effective date of any such
appointment the Company shall file notice thereof in writing with the
predecessor Rights Agent and each transfer agent of the Common Stock and the
Preferred Stock, and mail a notice thereof in writing to the registered holders
of the Rights Certificates.  Failure to give any notice provided for in this
Section 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.





                                     - 34 -
<PAGE>   38

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


       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 the
Board to reflect any adjustment or change in the Purchase Price per share and
the number or kind of class of shares or other securities or property
purchasable under the Rights Certificates made in accordance with the
provisions of this Agreement.  In addition, in connection with the issuance or
sale of shares of Common Stock following the Distribution Date (other than upon
exercise of a Right) 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, 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, issue Rights Certificates representing
the appropriate number of Rights in connection with such issuance or sale;
provided, however, that (i) no such Rights Certificate shall be issued if, and
to the extent that, the Company shall be advised by counsel that such issuance
would create a significant risk of material adverse tax consequences to the
Company or the Person to whom such 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.

                        (a)              The Board may, at its option, at any
time during the period commencing on the Rights Dividend Declaration Date and
ending on the earlier of (i) the Close of Business on the tenth 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 tenth day
following the Record Date), as such period may be extended or shortened in the
discretion of the Board of Directors (the "Redemption Period") or (ii) the
Close of Business on the Final Expiration Date, cause the Company to redeem all
but not less than all the then outstanding Rights at a





                                     - 35 -
<PAGE>   39
redemption price of $.005 per Right, as such amount may be appropriately
adjusted to reflect any stock split, stock  dividend or similar transaction
occurring after the date hereof (such redemption price being hereinafter
referred to as the "Redemption Price"); provided, however, that, if the Board
authorizes redemption of the Rights or a change in the Redemption Period on or
after the time a Person becomes an Acquiring Person, then such authorization
shall require the concurrence of two-thirds of the Directors.  If, following
the occurrence of a Stock Acquisition Date and following the expiration of the
Company s right of redemption hereunder (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 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, (ii)
there are no other Persons, immediately following the occurrence of the event
described in clause (i), who are Acquiring Persons, and (iii) the Board, by a
vote of two-thirds of the Board, shall so approve, then the Company's 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 or a Section 13 Event until such time as the Company s
right of redemption hereunder has expired.  The Company may, at its option, pay
the Redemption Price in cash, shares of Common Stock (based on the current
market price of the Common Stock at the time of redemption) or any other form
of consideration deemed appropriate by the Board.

                        (b)              Immediately upon the action of the
Board 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.
Promptly after the action of the Board 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 their last addresses as they appear upon the registry books of the
Rights Agent or, prior to the Distribution Date, on the registry books of the
Transfer Agent for the Common Stock.  Any notice which is mailed in the manner
herein provided shall be deemed given, whether or not the holder receives the
notice.  Each such notice of redemption will state the method by which the
payment of the Redemption Price will be made.


       SECTION 24.      EXCHANGE.

                        (a)              The Board may, at its option, at any
time after any Person becomes an Acquiring Person, exchange all or part of the
then outstanding and exercisable Rights (which shall not include Rights that
have become null and void





                                     - 36 -
<PAGE>   40
pursuant to the provisions of Section 7(e) hereof) for shares of Common Stock
at an exchange ratio of one share of Common Stock per Right, appropriately
adjusted to reflect any stock split, stock dividend or similar transaction
occurring after the date hereof (such exchange ratio being hereinafter referred
to as the "Exchange Ratio").

                        (b)              Immediately upon the action of the
Board ordering the exchange of any Rights pursuant to subsection (a) of this
Section 24 and without any further action and without any notice, the right to
exercise such Rights shall terminate and the only right thereafter of a holder
of such Rights shall be to receive that number of shares of Common Stock equal
to the number of such Rights held by such holder multiplied by the Exchange
Ratio.  The Company shall promptly give public notice of any such exchange;
provided, however, that the failure to give, or any defect in, such notice
shall not affect the validity of such exchange.  The Company promptly shall
mail a notice of any such exchange to all of the holders of such Rights at
their last addresses as they appear upon the registry books of the Rights
Agent.  Any notice which is mailed in the manner herein provided shall be
deemed given, whether or not the holder receives the notice.  Each such notice
of exchange will state the method by which the exchange of Common Stock for
Rights will be effected and, in the event of any partial exchange, the number
of Rights which will be exchanged.  Any partial exchange shall be effected pro
rata based on the number of Rights (other than Rights which have become void
pursuant to the provisions of Section 7(e) hereof) held by each holder of
Rights.

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

                        (d)              The Company shall not be required to
issue fractions of shares of Common Stock or to distribute certificates which
evidence fractional shares of Common Stock.  In lieu of such fractional shares,
the Company shall pay to the registered holders of the Right Certificates with
regard to which such fractional shares would otherwise be issuable an amount in
cash equal to the same fraction of the current market value of a whole share of
Common Stock.  For the purposes of this paragraph (d), the current market value
of a whole share of Common Stock shall be the closing price of a share of
Common Stock (as determined pursuant to the second sentence of Section 11(d)
hereof) for the Trading Day immediately prior to the date of exchange pursuant
to this Section 24.


       SECTION 25.      NOTICE OF CERTAIN EVENTS.

                        (a)              In case the Company shall propose, at
any time after the Distribution Date (i) to pay any dividend payable in stock
of any class to the holders





                                     - 37 -
<PAGE>   41
of Preferred Stock or to make any other distribution to the holders of
Preferred Stock (other than a regular quarterly cash dividend out of earnings
or retained earnings) or (ii) to offer to the holders of Preferred  Stock
rights or warrants to subscribe for or to purchase any additional shares of
Preferred Stock or shares of stock of any class or any other securities, rights
or options, or (iii) to effect any reclassification of its Preferred Stock
(other than a reclassification involving only the subdivision of outstanding
Preferred Stock), or (iv) to effect any consolidation or merger into or with,
or to effect any sale or other transfer (or to permit one or more of its
subsidiaries to effect any sale or other transfer), in one or more
transactions, of more than 50% of the assets or earning power of the Company
and its subsidiaries (taken as a whole) to, any other Person, or (v) to effect
the liquidation, dissolution or winding up of the Company, 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 26 hereof, a notice of such
proposed action, which shall specify the record date for the purposes of such
stock dividend, distribution of rights or warrants, or the date on which such
reclassification, consolidation, merger, sale, transfer, liquidation,
dissolution, or winding up is to take place and the date of participation
therein by the holders of the shares of Preferred Stock, if any such date is to
be fixed, and such notice shall be so given in the case of any action covered
by clause (i) or (ii) above at least twenty (20) days prior to the record date
for determining holders of the shares of Preferred Stock for purposes of such
action and in the case of any such other action, at least twenty (20) days
prior to the date of the taking of such proposed action or the date of
participation therein by the holders of the shares of Preferred Stock whichever
shall be the earlier.

                        (b)              In case any Section 11(a)(ii) Event
shall occur, then, in any such case, (i) 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 26 hereof, a notice of the
occurrence of such event which shall specify the event and the consequences of
the event to holders of Rights under Section 11(a)(ii) hereof, and (ii) all
references in the preceding paragraph to Preferred Stock shall be deemed
thereafter to refer to Common Stock and/or, if appropriate other securities.


       SECTION 26.      NOTICES.

                        Notices or demands authorized by this Agreement to be
given or made by the Rights Agent or by the holder of any 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:





                                     - 38 -
<PAGE>   42
               Orbital Sciences Corporation
               21700 Atlantic Boulevard
               Dulles, Virginia  20166

               Attention:  Legal Department


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

               BankBoston, N.A.
               c/o Boston Equiserve Limited Partnership
               150 Royall Street
               Canton, MA 02021

               Attention:  Client Administration

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


       SECTION 27.      SUPPLEMENTS AND AMENDMENTS.

                        Prior to the Distribution Date and subject to the
penultimate sentence of this Section 27, the Company may, and the Rights Agent
shall, if the Company so directs, supplement or amend any provision of this
Agreement without the approval of any holders of certificates representing
shares of Common Stock.  From and after the Distribution Date and subject to
the penultimate sentence of this Section 27, the Company may, and the Rights
Agent shall at any time and from time to time, 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 shorten or lengthen any
time period hereunder 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 the interests of the holders of Rights Certificates (other
than an Acquiring Person or an Affiliate or Associate of any such Person);
provided, however, that this Agreement may not be supplemented or amended (A)
to lengthen a time period relating to when the Rights may be redeemed at such
time as the





                                     - 39 -
<PAGE>   43
Rights are not then redeemable, or (B) to lengthen any other time period unless
such lengthening is for the purpose of protecting, enhancing or clarifying the
rights of, and/or the benefits to, the holders of Rights (other than an
Acquiring Person or an Affiliate or Associate of any such Person).  Upon the
delivery of a  certificate from an appropriate officer of the Company which
states that the proposed supplement or amendment is in compliance with the
terms of this Section 27, the Rights Agent shall execute such supplement or
amendment.  Notwithstanding anything contained in this Agreement to the
contrary, no supplement or amendment shall be made which changes the Redemption
Price, the Final Expiration Date, the number of one-one thousandths of a share
of Preferred Stock for which a Right is exercisable or the Purchase Price;
provided, however, that at any time prior to the Distribution Date, the Company
may amend this Agreement to increase the Purchase Price.  Prior to the
Distribution Date, the interests of the holders of Rights shall be deemed
coincident with the interests of the holders of shares of Common Stock.


       SECTION 28.      SUCCESSORS.

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


       SECTION 29.      DETERMINATIONS AND ACTIONS BY THE BOARD, 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)(1)(i) of
the General Rules and Regulations under the Exchange Act.  The Board (with,
where specifically provided for herein, the concurrence of two-thirds of the
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
two-thirds of the 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 without limitation 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 two-thirds of the Directors) in good faith, shall
(x) be final, conclusive and binding on the Company, the Rights Agent, the
holders of the Rights and all other Persons, and (y) not subject any director
to any liability to the holders of the Rights.





                                     - 40 -
<PAGE>   44

       SECTION 30.      BENEFITS OF THIS AGREEMENT.

                        Nothing in this Agreement shall be construed to give to
any Person other than the Company, the Rights Agent and the registered holders
of the Rights Certificates (and, prior to the Distribution Date, the 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
Common Stock).


       SECTION 31.      SEVERABILITY.

                        If any term, provision, covenant or restriction of this
Agreement is held by a court of competent jurisdiction or other authority to be
invalid, void or unenforceable, the remainder of the terms, provisions,
covenants and restrictions of this Agreement shall remain in full force and
effect and shall in no way be affected, impaired or invalidated; 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
determines in its good faith judgment that severing the invalid language from
this Agreement would materially and 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.


       SECTION 32.      GOVERNING LAW.

                        This Agreement, each Right and each Rights Certificate
issued hereunder shall be deemed to be a contract made under the laws of the
State of Delaware and for all purposes shall be governed by and construed in
accordance with the laws of such State.


       SECTION 33.      COUNTERPARTS.

                        This Agreement may be executed in any number of
counterparts.  It shall not be necessary that the signature of or on behalf of
each party appears on each counterpart, but it shall be sufficient that the
signature of or on behalf of each party appears on one or more of the
counterparts.  All counterparts shall collectively constitute a single
agreement.  It shall not be necessary in any proof of this Agreement to produce
or account for more than a number of counterparts containing the respective
signatures of or on behalf of all of the parties.





                                     - 41 -
<PAGE>   45
       SECTION 34.      DESCRIPTIVE HEADINGS.

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

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

Attest:                                   ORBITAL SCIENCES               
                                          CORPORATION                    
                                                                         
                                                                         
                                                                         
By: /s/ ELIZABETH ABDOO                   By: /s/ JEFFREY V. PIRONE      
   -----------------------------             ----------------------------
   Name:  Elizabeth Abdoo                    Name:  Jeffrey V. Pirone     
   Title: Assistant Secretary               Title: Executive Vice President
                                                    and Chief Financial Officer
                                                                         
                                                                         
                                                                         
Attest:                                   BANKBOSTON, N.A.               
                                                                         
                                                                         
By: /s/ LINDA ADAMS                       By: /s/ JOSHUA McGINN          
   -----------------------------             ----------------------------
   Name:  Linda Adams                        Name:  Joshua McGinn         
   Title: Account Manager                    Title: Senior Account Manager





                                     - 42 -


<PAGE>   1

                          ORBITAL SCIENCES CORPORATION
                  CERTIFICATE OF DESIGNATION, PREFERENCES AND
                                   RIGHTS OF
                 SERIES B JUNIOR PARTICIPATING PREFERRED STOCK


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


                 ORBITAL SCIENCES CORPORATION, a corporation organized and
existing under the General Corporation Law of the State of Delaware, in
accordance with the provisions of Section 103 thereof, DOES HEREBY CERTIFY:

                 That pursuant to the authority conferred upon the Board of
Directors by the Restated Certificate of Incorporation, as amended, of the said
Corporation, the said Board of Directors on October 22, 1998 adopted the
following resolution creating a series of 80,000 shares of Preferred Stock
designated as Series B Junior Participating Preferred Stock:

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

                 Section 1.     Designation and Amount.  The shares of such
series, par value $0.01 per share, shall be designated as "Series B Junior
Participating Preferred Stock" and the number of shares constituting such
series shall be 80,000.  Such number of shares may be increased or decreased by
resolution of the Board of Directors; provided, that no decrease shall reduce
the number of shares of Series B Junior Participating Preferred Stock to a
number less than the number of shares then outstanding plus the number of
shares reserved for issuance upon the exercise of outstanding options, rights
or warrants or upon the conversion of any outstanding securities issued by the
Corporation convertible into Series B Junior Participating Preferred Stock.

                 Section 2.     Dividends and Distributions.
<PAGE>   2
                 (A)    Subject to the prior and superior rights of the holders
of any shares of any series of Preferred Stock ranking prior and superior to
the shares of Series B Junior Participating Preferred Stock with respect to
dividends, the holders of shares of Series B Junior Participating Preferred
Stock shall be entitled to receive, when, as and if declared by the Board of
Directors out of funds legally available for the purpose, quarterly dividends
payable in cash on the 15th day of April, July, October and January, in each
year (each such date being referred to herein as a "Quarterly Dividend Payment
Date"), commencing on the first Quarterly Dividend Payment Date after first
issuance of a share or fraction of a share of Series B Junior Participating
Preferred Stock, in an amount per share (rounded to the nearest cent) equal to
the greater of (a) $10.00 or (b) subject to the provision for adjustment
hereinafter set forth, 1000 times the aggregate per share amount of all cash
dividends, and 1000 times the aggregate per share amount (payable in kind) of
all non-cash dividends or other distributions, other than a dividend payable in
shares of common stock, par value $0.01 per share, of the Corporation (the
"Common Stock"), or a subdivision of the outstanding shares of Common Stock (by
reclassification or otherwise), declared on the Common Stock, since the
immediately preceding Quarterly Dividend Payment Date, or, with respect to the
first Quarterly Dividend Payment Date, since the first issuance of any share or
fraction of a share of Series B Junior Participating Preferred Stock.  In the
event the Corporation shall at any time after October 22, 1998 (the "Rights
Declaration Date") (i) declare or pay any dividend on Common Stock payable in
shares of Common Stock, (ii) subdivide the outstanding Common Stock, or (iii)
combine the outstanding Common Stock into a smaller number of shares, then in
each such case the amount to which holders of shares of Series B Junior
Participating Preferred Stock were entitled immediately prior to such event
under clause (b) of the preceding sentence shall be adjusted by multiplying
such amount by a fraction, the numerator of which is the number of shares of
Common Stock outstanding immediately after such event and the denominator of
which is the number of shares of Common Stock that were outstanding immediately
prior to such event.

                 (B)    The Corporation shall declare a dividend or
distribution on the Series B Junior Participating Preferred Stock as provided
in paragraph (A) above immediately after it declares a dividend or distribution
on the Common Stock (other than a dividend payable in shares of Common Stock);
provided that, in the event no dividend or distribution shall have been
declared on the Common Stock during the period between any Quarterly Dividend
Payment Date and the next subsequent Quarterly Dividend Payment Date, a
dividend of $10.00 per share on the Series B Junior Participating Preferred
Stock shall nevertheless be payable on such subsequent Quarterly Dividend
Payment Date.





                                     - 2 -
<PAGE>   3
                 (C) Dividends shall begin to accrue and be cumulative on
outstanding shares of Series B Junior Participating Preferred Stock from the
Quarterly Dividend Payment Date next preceding the date of issue of such shares
of Series B Junior Participating Preferred Stock, unless the date of issue of
such shares is prior to the record date set for the first Quarterly Dividend
Payment Date, in which case dividends on such shares shall begin to accrue from
the date of issue of such shares, or unless the date of issue is a Quarterly
Dividend Payment Date or is a date after the record date for the determination
of holders of shares of Series B Junior Participating Preferred Stock entitled
to receive a quarterly dividend and before such Quarterly Dividend Payment
Date, in either of which event such dividends shall begin to accrue and be
cumulative from such Quarterly Dividend Payment Date.  Accrued but unpaid
dividends shall not bear interest.  Dividends paid on the shares of Series B
Junior Participating Preferred Stock in an amount less than the total amount of
such dividends at the time accrued and payable on such shares shall be
allocated pro rata on a share-by-share basis among all such shares at the time
outstanding.  The Board of Directors may fix a record date for the
determination of holders of shares of Series B Junior Participating Preferred
Stock entitled to receive payment of a dividend or distribution declared
thereon, which record date shall be no more than 50 days prior to the date
fixed for the payment thereof.

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

                 (A)      Subject to the provision for adjustment hereinafter
set forth, each share of Series B Junior Participating Preferred Stock shall
entitle the holder thereof to 1000 votes on all matters submitted to a vote of
the stockholders of the Corporation.  In the event the Corporation shall at any
time after the Rights Declaration Date (i) declare any dividend on Common Stock
payable in shares of Common Stock, (ii) subdivide the outstanding Common Stock,
or (iii) combine the outstanding Common Stock into a smaller number of shares,
then in each such case the number of votes per share to which holders of shares
of Series B Junior Participating Preferred Stock were entitled immediately
prior to such event shall be adjusted by multiplying such number by a fraction
the numerator of which is the number of shares of Common Stock outstanding
immediately after such event and the denominator of which is the number of
shares of Common Stock that were outstanding immediately prior to such event.

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





                                     - 3 -
<PAGE>   4
                 (C)    Except as set forth herein, holders of Series B Junior
Participating Preferred Stock shall have no special voting rights and their
consent shall not be required (except to the extent they are entitled to vote
with holders of Common Stock as set forth herein) for taking any corporate
action.

                 Section 4.     Certain Restrictions.

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

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

                        (ii)      declare or pay dividends on, or make any
other distributions on, any shares of stock ranking on a parity (either as to
dividends or upon liquidation, dissolution or winding up) with the Series B
Junior Participating Preferred Stock, except dividends paid ratably on the
Series B Junior Participating Preferred Stock and all such parity stock on
which dividends are payable in proportion to the total amounts to which the
holders of all such shares are then entitled; or

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

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





                                     - 4 -
<PAGE>   5
                 (B)    The Corporation shall not permit any subsidiary of the
Corporation to purchase or otherwise acquire for consideration any shares of
stock of the Corporation unless the Corporation could, under paragraph (A) of
this Section 4, purchase or otherwise acquire such shares at such time and in
such manner.

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

                 Section 6.     Liquidation, Dissolution or Winding Up.

                 (A)    Upon any liquidation (voluntary or otherwise),
dissolution or winding up of the Corporation, no distribution shall be made to
the holders of shares of stock ranking junior (either as to dividends or upon
liquidation, dissolution or winding up) to the Series B Junior Participating
Preferred Stock unless, prior thereto, the holders of shares of Series B Junior
Participating Preferred Stock shall have received $210,000 per share, plus any
unpaid dividends and distributions payable thereon, whether or not declared, to
the date of such payment (the "Series B Liquidation Preference").  Following
the payment of the full amount of the Series B Liquidation Preference, no
additional distributions shall be made to the holders of Series B Junior
Participating Preferred Stock unless, prior thereto, the holders of shares of
Common Stock shall have received an amount per share (the "Common Adjustment")
equal to the quotient obtained by dividing (i) the Series B Liquidation
Preference by (ii) 1000 (as appropriately adjusted as set forth in subparagraph
(C) below to reflect such events as stock splits, stock dividends and
recapitalizations with respect to the Common Stock) (such number in clause (ii)
immediately above being referred to as the "Adjustment Number").  Following the
payment of the full amount of the Series B Liquidation Preference and the
Common Adjustment in respect of all outstanding shares of Series B Junior
Participating Preferred Stock and Common Stock, respectively, holders of Series
B Junior Participating Preferred Stock and holders of shares of Common Stock
shall receive their ratable and proportionate share of the remaining assets to
be distributed in the ratio of the Adjustment Number to one (1) with respect to
such Preferred Stock and Common Stock, on a per share basis, respectively.





                                     - 5 -
<PAGE>   6
                 (B)    In the event, however, that there are not sufficient
assets available to permit payment in full of the Series B Liquidation
Preference and the liquidation preferences of all other series of preferred
stock, if any, which rank on a parity with the Series B Junior Participating
Preferred Stock, then such remaining assets shall be distributed ratably to the
holders of such parity shares in proportion to their respective liquidation
preferences.  In the event, however, that there are sufficient assets available
to permit payment in full of the Common Adjustment, then such remaining assets
shall be distributed ratably to the holders of Common Stock.

                 (C)    In the event the Corporation shall at any time after
the Rights Declaration Date (i) declare any dividend on Common Stock payable in
shares of Common Stock, (ii) subdivide the outstanding Common Stock, or (iii)
combine the outstanding Common Stock into a smaller number of shares, then in
each such case the Adjustment Number in effect immediately prior to such event
shall be adjusted by multiplying such Adjustment Number by a fraction the
numerator of which is the number of shares of Common Stock outstanding
immediately after such event and the denominator of which is the number of
shares of Common Stock that were outstanding immediately prior to such event.

                 Section 7.     Consolidation, Merger, etc.  In case the
Corporation shall enter into any consolidation, merger, combination or other
transaction in which the shares of Common Stock are exchanged for or changed
into other stock or securities, cash and/or any other property, then in any
such case the shares of Series B Junior Participating Preferred Stock shall at
the same time be similarly exchanged or changed in an amount per share (subject
to the provision for adjustment hereinafter set forth) equal to 1000 times the
aggregate amount of stock, securities, cash and/or any other property (payable
in kind), as the case may be, into which or for which each share of Common
Stock is changed or exchanged.  In the event the Corporation shall at any time
after the Rights Declaration Date (i) declare any dividend on Common Stock
payable in shares of Common Stock, (ii) subdivide the outstanding Common Stock,
or (iii) combine the outstanding Common Stock into a smaller number of shares,
then in each such case the amount set forth in the preceding sentence with
respect to the exchange or change of shares of Series B Junior Participating
Preferred Stock shall be adjusted by multiplying such amount by a fraction the
numerator of which is the number of shares of Common Stock outstanding
immediately after such event and the denominator of which is the number of
shares of Common Stock that were outstanding immediately prior to such event.

                 Section 8.     Redemption.  The outstanding shares of Series B
Junior Participating Preferred Stock may be redeemed as a whole, but not in
part, at any time, or from time to time, at the option of the Board, at a cash





                                     - 6 -
<PAGE>   7
price per share equal to 105 percent of (i) the product of the Adjustment
Number times the Average Market Value (as such term is hereinafter defined) of
the Common Stock, plus (ii) all dividends which on the redemption date are
payable on the shares to be redeemed and have not been paid or declared, and a
sum sufficient for the payment thereof set apart, without interest.  The
"Average Market Value" is the average of the closing sale prices of the Common
Stock during the 30 day period immediately preceding the date before the
redemption date on the Nasdaq National Stock Market, or if such stock is not
listed on the Nasdaq National Stock Market, on the principal United States
securities exchange registered under the Securities Exchange Act of 1934, as
amended, on which such stock is listed, or, if such stock is not listed on any
such exchange, or if no such quotations are available, the fair market value of
the Common Stock as determined by the Board in good faith.

                 Section 9.     Ranking.  Notwithstanding anything contained
herein to the contrary, the Series B Junior Participating Preferred Stock shall
rank junior to all other series of the Corporation's Preferred Stock as to
voting rights, the payment of dividends and the distribution of assets in
liquidation, unless the terms of any such series shall provide otherwise.

                 Section 10.    Amendment. The Restated Certificate of
Incorporation, as amended, of the Corporation shall not be further amended in
any manner which would materially alter or change the powers, preferences or
special rights of the Series B Junior Participating Preferred Stock so as to
affect them adversely without the affirmative vote of the holders of at least a
majority of the outstanding shares of Series B Junior Participating Preferred
Stock, voting separately as a class.

                 Section 11.    Fractional Shares.  Series B Junior
Participating Preferred Stock may be issued in fractions of a share which shall
entitle the holders, in proportion to such holders fractional shares, to
exercise voting rights, receive dividends, participate in distributions and to
have the benefit of all other rights of holders of Series B Junior
Participating Preferred Stock.





                                     - 7 -
<PAGE>   8
                 IN WITNESS WHEREOF, I have executed and subscribed this
Certificate and do affirm the foregoing as true under the penalties of perjury
this 30 day of October, 1998.





                                           ORBITAL SCIENCES CORPORATION



                                           By: /s/ JEFFREY V. PIRONE
                                              ----------------------------
                                               Name:  Jeffrey V. Pirone
                                               Title: Executive Vice President
                                                      and Chief Financial
                                                      Officer

Attest:


By: /s/ ELIZABETH ABDOO
   ----------------------------




                                     - 8 -

<PAGE>   1
                                                                       Exhibit C

                          [Form of Rights Certificate]


            Certificate No. R-__________          __________ Rights

         NOT EXERCISABLE AFTER OCTOBER 31, 2008 OR EARLIER IF REDEEMED OR
         EXCHANGED BY THE COMPANY.  THE RIGHTS ARE SUBJECT TO REDEMPTION, AT
         THE OPTION OF THE COMPANY, AT $0.005 PER RIGHT ON THE TERMS SET FORTH
         IN THE RIGHTS AGREEMENT.  UNDER CERTAIN CIRCUMSTANCES, RIGHTS
         BENEFICIALLY OWNED BY AN ACQUIRING PERSON OR AN AFFILIATE OR ASSOCIATE
         OF ANY SUCH PERSON (AS SUCH TERMS ARE DEFINED IN THE RIGHTS AGREEMENT)
         AND ANY SUBSEQUENT HOLDER OF SUCH RIGHTS MAY BECOME NULL AND VOID.
         THE RIGHTS SHALL NOT BE EXERCISABLE, AND SHALL BE VOID SO LONG AS
         HELD, BY A HOLDER IN ANY JURISDICTION WHERE THE REQUISITE
         QUALIFICATION TO THE ISSUANCE TO SUCH HOLDER, OR THE EXERCISE BY SUCH
         HOLDER, OF THE RIGHTS IN SUCH JURISDICTION SHALL NOT HAVE BEEN
         OBTAINED OR BE OBTAINABLE.  [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 portion of the legend in brackets shall be inserted
only if applicable and shall replace the preceding sentence.
<PAGE>   2

                               Rights Certificate

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

                 This certifies that _______________________ , or its
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 October 22, 1998
(the "Rights Agreement"), between Orbital Sciences Corporation, a Delaware
corporation (the "Company"), and BankBoston, N.A. (the "Rights Agent"), to
purchase from the Company at any time prior to October 31, 2008 at the office
or offices of the Rights Agent designated for such purpose, or its successors
as Rights Agent, one-one thousandth of a fully paid, non-assessable share of
Series B Junior Participating Preferred Stock, par value $0.01 per share (the
"Preferred Stock") of the Company, at a purchase price of $210 per one-one
thousandth 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 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 October 22, 1998, based on the Preferred
Stock as constituted at such date, and are subject to adjustment upon the
happening of certain events as provided in the Rights Agreement.

                 From and after the occurrence of an event described in Section
11(a)(ii) of the Rights Agreement, the Rights evidenced by this Rights
Certificate beneficially owned by (i) an Acquiring Person or an Affiliate or
Associate of any such 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, concurrently with or after such
transfer, became an Acquiring Person or an Affiliate or Associate of an
Acquiring Person 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.

                 The Rights evidenced by this Rights Certificate shall not be
exercisable, and shall be void so long as held, by a holder in any jurisdiction
where the requisite qualification to the issuance to such holder, or the
exercise by such holder, of the Rights in such jurisdiction shall not have been
obtained or be obtainable.

                 As provided in the Rights Agreement, the Purchase Price and
the number and kind of shares of Preferred Stock or other securities, which may
be purchased upon the exercise of the Rights evidenced by this Rights
Certificate are subject to modification and adjustment upon the happening of
certain events, including Triggering Events (as such term is defined in the
Rights Agreement).





                                     - 2 -
<PAGE>   3
                 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 office or offices of the Rights Agent
designated for such purpose, may be exchanged for another Rights Certificate or
Right Certificates of like tenor and date evidencing Rights entitling the
holder to purchase a like aggregate number of one-one thousandths of a share of
Preferred Stock as the Rights evidenced by the Rights Certificate or Rights
Certificates surrendered shall have entitled such holder to purchase.  If this
Rights Certificate shall be exercised 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 $0.005 per Right at any time prior to the earlier of the
close of business on (i) the tenth day following the Stock Acquisition Date (as
such time period may be changed in the discretion of the Board of Directors
pursuant to the Rights Agreement), and (ii) the Final Expiration Date (as
defined in the Rights Agreement).  Under certain circumstances set forth in the
Rights Agreement, the decision to redeem shall require the concurrence of
two-thirds of the Directors.  After the expiration of the redemption period,
the Company's right of redemption may be reinstated if the Acquiring Person
reduces its beneficial ownership to 10% or less of the outstanding shares of
Common Stock in a transaction or series of transactions not involving the
Company, and such reinstatement is approved by the Company's Board of
Directors.

                 At any time after a person becomes an Acquiring Person, the
Board of Directors of the Company may exchange the Rights (other than Rights
owned by such Acquiring Person which have become void), in whole or in part, at
an exchange ratio of one share of Common Stock per Right (subject to
adjustment).

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





                                     - 3 -
<PAGE>   4

                 No holder of this Rights Certificate, as such, shall be
entitled to vote or receive dividends or be deemed for any purpose the holder
of shares of Preferred Stock or of any other securities of the Company which
may at any time be issuable on the exercise hereof, nor shall anything
contained in the Rights Agreement or herein be construed to confer upon the
holder hereof, as such, any of the rights of a 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 
            ------------------ ---, -------

ATTEST:                                 Orbital Sciences Corporation 
                                                                          
                                                                          
                                                                          
                                        By:                                   
- ---------------------------------          -----------------------------------
                                           Name:                              
                                                ------------------------------
                                           Title:                             
                                                 -----------------------------
                                                                          
                                                                          
Countersigned:                                                            
                                                                          
                                                                          
                                                                          
                                                                          
- ---------------------------------                                         
                                                                          
                                 
- ---------------------------------
                                 
                                 
                                 
By:                              
    -----------------------------
     Authorized Signature        





                                     - 4 -
<PAGE>   5





                  [Form of Reverse Side of Rights Certificate]




                               FORM OF ASSIGNMENT


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


FOR VALUE
RECEIVED________________________________________________________________________
________________________________________________________________________________
hereby sells, assigns and transfers unto _______________________________________
________________________________________________________________________________
(Please print name and address of transferee)


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


Dated: 
       ----------------------------------, -----        


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


Signature Guaranteed:
<PAGE>   6





                                  Certificate


                 The undersigned hereby certifies by checking the appropriate
boxes that:

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


Dated: 
       -----------------------, ----              ---------------------------
                                                  Signature


Signature Guaranteed:
<PAGE>   7





                                     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.
<PAGE>   8





                          FORM OF ELECTION TO PURCHASE

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


To:              ______________________________

                 The undersigned hereby irrevocably elects to exercise
____________ Rights represented by this Rights Certificate to purchase the
shares of Preferred 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 print name and address)

________________________________________________________________________________


Please insert social security
or other identifying number: _______________________________________

                 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 print name and address)

________________________________________________________________________________


Please insert social security
or other identifying number: _______________________________________

____________________________________________________________________

Dated: _________________________, ____

                                        ________________________________________
                                        Signature

Signature Guaranteed:





                                     - 2 -
<PAGE>   9





                                  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 Person (as such terms
are defined in the Rights Agreement);

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


Dated:
       -------------------------, -------         -----------------------------
                                                  Signature


Signature Guaranteed:





                                     - 3 -
<PAGE>   10





                                     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.





                                     - 4 -


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