SCHERING PLOUGH CORP
8-A12B, 1997-06-30
PHARMACEUTICAL PREPARATIONS
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                        SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C.  20549

                                   ___________

                                     FORM 8-A

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



                           Schering-Plough Corporation
                                                                                
              (Exact name of registrant as specified in its charter)



         New Jersey                                              22-1918501
                                                                                
         (State of incorporation or organization)              (IRS Employer
                                                               Identification
                                                               No.)



         One Giralda Farms, Madison, New Jersey                07940-1000
                                                                               
         (Address of principal executive offices)              (Zip Code)



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



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

         Preferred Share Purchase Rights       New York Stock Exchange


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



                                          None
                                                                                
                                    (Title of Class)<PAGE>







          Item 1.  Description of Securities To Be Registered.

                   On June 24, 1997, the Board of Directors of Schering-Plough
          Corporation (the "Company") redeemed, effective as of July 10, 1997,
          all of the outstanding rights (the "Existing Rights") to purchase
          shares of Series A Junior Participating Preferred Stock, par value
          $1.00 per share, issued pursuant to the Rights Agreement, dated as
          of July 25, 1989, between the Company and the Bank of New York, at a
          redemption price of $.00125 per Existing Right (such price to be
          paid on July 30, 1997), and, in conjunction therewith, declared a
          dividend of one preferred share purchase right (a "New Right") for
          each share of common stock, par value $1.00 per share (the "Common
          Shares"), of the Company outstanding at the close of business on
          July 10, 1997 (the "Record Date") to the stockholders of record on
          that date.  Each New Right entitles the registered holder to
          purchase from the Company one one-hundredth of a share of Series A
          Junior Participating Preferred Stock, par value $1.00 per share (the
          "Preferred Shares"), of the Company at a price of $200 per one one-
          hundredth of a Preferred Share (the "Purchase Price"), subject to
          adjustment.  The description and terms of the New Rights are set
          forth in a Rights Agreement (the "New Rights Agreement"), dated as
          of June 24, 1997, between the Company and The Bank of New York, as
          Rights Agent (the "Rights Agent").

                   Until 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") have acquired beneficial
          ownership of 20% or more of the outstanding Common Shares or (ii) 10
          business days (or such later date as may be determined by action of
          the Board of Directors prior to such time as any person or group of
          affiliated persons becomes an Acquiring Person) following the
          commencement of, or announcement of an intention to make, a tender
          offer or exchange offer the consummation of which would result in
          the beneficial ownership by a person or group of 20% or more of the
          outstanding Common Shares (the earlier of such dates being called
          the "Distribution Date"), the New Rights will be evidenced, with
          respect to any of the Common Share certificates outstanding as of
          the Record Date, by such Common Share certificate with a copy of the
          Summary of New Rights attached thereto.

                   The New Rights Agreement provides that, until the
          Distribution Date (or earlier redemption or expiration of the New
          Rights), the New Rights will be transferred with and only with the
          Common Shares.  Until the Distribution Date (or earlier redemption
          or expiration of the New Rights), new Common Share certificates
          issued after the Record Date upon transfer or new issuance of Common
          Shares will contain a notation incorporating the New Rights
          Agreement by reference.  Until the Distribution Date (or earlier
          redemption or expiration of the New Rights), the surrender for
          transfer of any certificates for Common Shares outstanding as of the
          Record Date, even without such notation or a copy of the Summary of
          New Rights being attached thereto, will also constitute the transfer
          of the New Rights associated with the Common Shares represented by
          such certificate.  As soon as practicable following the Distribution


                                   Page 2 of 7<PAGE>







          Date, separate certificates evidencing the New Rights ("Right
          Certificates") will be mailed to holders of record of the Common
          Shares as of the close of business on the Distribution Date and such
          separate Right Certificates alone will evidence the New Rights.

                   The New Rights are not exercisable until the Distribution
          Date.  The New Rights will expire on July 10, 2007 (the "Final
          Expiration Date"), unless the Final Expiration Date is extended or
          unless the New Rights are earlier redeemed or exchanged by the
          Company, in each case, as described below.

                   The Purchase Price payable, and the number of Preferred
          Shares or other securities or property issuable, upon exercise of
          the New Rights are subject to adjustment from time to time to
          prevent dilution (i) in the event of a stock dividend on, or a
          subdivision, combination or reclassification of, the Preferred
          Shares, (ii) upon the grant to holders of the Preferred Shares of
          certain rights or warrants to subscribe for or purchase Preferred
          Shares at a price, or securities convertible into Preferred Shares
          with a conversion price, less than the then-current market price of
          the Preferred Shares or (iii) upon the distribution to holders of
          the Preferred Shares of evidences of indebtedness or assets (ex-
          cluding regular periodic cash dividends paid out of earnings or
          retained earnings or dividends payable in Preferred Shares) or of
          subscription rights or warrants (other than those referred to
          above).

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

                   Preferred Shares purchasable upon exercise of the New
          Rights will not be redeemable.  Each Preferred Share will be
          entitled to a minimum preferential quarterly dividend payment of $1
          per share but will be entitled to an aggregate dividend of 100 times
          the dividend declared per Common Share.  In the event of
          liquidation, the holders of the Preferred Shares will be entitled to
          a minimum preferential liquidation payment of $100 per share but
          will be entitled to an aggregate payment of 100 times the payment
          made per Common Share.  Each Preferred Share will have 100 votes,
          voting together with the Common Shares.  Finally, in the event of
          any merger, consolidation or other transaction in which Common
          Shares are exchanged, each Preferred Share will be entitled to
          receive 100 times the amount received per Common Share.  These
          rights are protected by customary antidilution provisions.

                   Because of the nature of the Preferred Shares' dividend,
          liquidation and voting rights, the value of the one one-hundredth
          interest in a Preferred Share purchasable upon exercise of each New
          Right should approximate the value of one Common Share.


                                   Page 3 of 7<PAGE>







                   In the event that the Company is acquired in a merger or
          other business combination transaction or 50% or more of its
          consolidated assets or earning power are sold after a person or
          group has become an Acquiring Person, proper provision will be made
          so that each holder of a New Right will thereafter have the right to
          receive, upon the exercise thereof at the then current exercise
          price of the New Right, that number of shares of common stock of the
          acquiring company which at the time of such transaction will have a
          market value of two times the exercise price of the New Right.  In
          the event that any person or group of affiliated or associated
          persons becomes an Acquiring Person, proper provision shall be made
          so that each holder of a New Right, other than New Rights
          beneficially owned by the Acquiring Person (which will thereafter be
          void), will thereafter have the right to receive upon exercise that
          number of Common Shares having a market value of two times the
          exercise price of the New Right.

                   At any time after any person or group becomes an Acquiring
          Person and prior to the acquisition by such person or group of 50%
          or more of the outstanding Common Shares, the Board of Directors of
          the Company may exchange the New Rights (other than New Rights owned
          by such person or group which will have become void), in whole or in
          part, at an exchange ratio of one Common Share, or one one-hundredth
          of a Preferred Share (or of a share of a class or series of the Com-
          pany's preferred stock having equivalent rights, preferences and
          privileges), per New Right (subject to adjustment).

                   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
          Preferred Shares will be issued (other than fractions which are
          integral multiples of one one-hundredth of a Preferred Share, which
          may, at the election of the Company, be evidenced by depositary
          receipts) and in lieu thereof, an adjustment in cash will be made
          based on the market price of the Preferred Shares on the last
          trading day prior to the date of exercise.

                   At any time prior to the acquisition by a person or group
          of affiliated or associated persons of beneficial ownership of 20%
          or more of the outstanding Common Shares, the Board of Directors of
          the Company may redeem the New Rights in whole, but not in part, at
          a price of $.01 per New Right (the "Redemption Price").  The
          redemption of the New Rights may be made effective at such time on
          such basis with such conditions as the Board of Directors in its
          sole discretion may establish.  Immediately upon any redemption of
          the New Rights, the right to exercise the New Rights will terminate
          and the only right of the holders of New Rights will be to receive
          the Redemption Price.

                   The terms of the New Rights may be amended by the Board of
          Directors of the Company without the consent of the holders of the
          New Rights, including an amendment to lower certain thresholds
          described above to not less than the greater of (i) the sum of .001%
          and the largest percentage of the outstanding Common Shares then


                                   Page 4 of 7<PAGE>







          known to the Company to be beneficially owned by any person or group
          of affiliated or associated persons and (ii) 10%, except that from
          and after such time as any person or group of affiliated or
          associated persons becomes an Acquiring Person no such amendment may
          adversely affect the interests of the holders of the New Rights.

                   Until a New Right is exercised, the holder thereof, as
          such, will have no rights as a stockholder of the Company, in-
          cluding, without limitation, the right to vote or to receive
          dividends.

                   The New Rights have certain anti-takeover effects.  The New
          Rights will cause substantial dilution to a person or group that
          attempts to acquire the Company on terms not approved by the
          Company's Board of Directors, except pursuant to an offer
          conditioned on a substantial number of New Rights being acquired.
          The New Rights should not interfere with any merger or other busi-
          ness combination approved by the Board of Directors since the New
          Rights may be redeemed by the Company at the Redemption Price prior
          to the time that a person or group has acquired beneficial ownership
          of 20% or more of the Common Shares.

                   The foregoing description of the New Rights Agreement is
          qualified in its entirety by reference to the full text of the New
          Rights Agreement, which is attached hereto as Exhibit 1 and
          incorporated herein by reference.



          Item 2.  Exhibits.

                   1.   Rights Agreement, dated as of June 24, 1997, between
                        Schering-Plough Corporation and The Bank of New York
                        which includes the form of Right Certificate as
                        Exhibit A, the Summary of Rights to Purchase Preferred
                        Shares as Exhibit B, and the form of Certificate of
                        Amendment of Certificate of Incorporation, setting
                        forth the terms of the Series A Junior Participating
                        Preferred Stock, par value $1.00 per share, as Exhibit
                        C.  Pursuant to the Rights Agreement, printed Right
                        Certificates will not be mailed until as soon as
                        practicable after the earlier of the tenth day after
                        public announcement that a person or group has
                        acquired beneficial ownership of 20% or more of the
                        Common Shares or the tenth business day (or such later
                        date as may be determined by action of the Board of
                        Directors) after a person commences, or announces its
                        intention to commence, a tender offer or exchange
                        offer the consummation of which would result in the
                        beneficial ownership by a person or group of 20% or
                        more of the Common Shares.


                                   Page 5 of 7<PAGE>







                                        SIGNATURE



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



          Dated:  June 30, 1997

                                       SCHERING-PLOUGH CORPORATION


                                       By /s/ E. Kevin Moore
                                          E. Kevin Moore
                                          Vice President and Treasurer

































                                   Page 6 of 7<PAGE>







                                      EXHIBIT LIST



                                                            

                    1.  Rights Agreement, dated as of June 24,
                        1997, between Schering-Plough
                        Corporation and The Bank of New York
                        which includes the form of Right
                        Certificate as Exhibit A, the Summary of
                        Rights to Purchase Preferred Shares as
                        Exhibit B, and the form of Certificate
                        of Amendment of Certificate of
                        Incorporation, setting forth the terms
                        of the Series A Junior Participating
                        Preferred Stock, par value $1.00 per
                        share, as Exhibit C.  Pursuant to the
                        Rights Agreement, printed Right
                        Certificates will not be mailed until as
                        soon as practicable after the earlier of
                        the tenth day after public announcement
                        that a person or group has acquired
                        beneficial ownership of 20% or more of
                        the Common Shares or the tenth business
                        day (or such later date as may be
                        determined by action of the Board of
                        Directors) after a person commences, or
                        announces its intention to commence, a
                        tender offer or exchange offer the
                        consummation of which would result in
                        the beneficial ownership by a person or
                        group of 20% or more of the Common
                        Shares.


















                                   Page 7 of 7


                                                        Exhibit 1


                                                        Execution Copy



















                                                                          



                          SCHERING-PLOUGH CORPORATION


                                      and


                              THE BANK OF NEW YORK


                                  Rights Agent

                                Rights Agreement

                           Dated as of June 24, 1997


         ____________________________________________________________<PAGE>








                               TABLE OF CONTENTS


                                                                 Page


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

         Section 2.  Appointment of Rights Agent...............    7

         Section 3.  Issue of Right Certificates...............    7

         Section 4.  Form of Right Certificates................   11

         Section 5.  Countersignature and Registration.........   11

         Section 6.  Transfer, Split-Up, Combination and
                       Exchange of Right Certificates;
                       Mutilated, Destroyed, Lost or
                       Stolen Right Certificates...............   13

         Section 7.  Exercise of Rights; Purchase Price;
                       Expiration Date of Rights...............   14

         Section 8.  Cancellation and Destruction of
                       Right Certificates......................   17

         Section 9.  Availability of Preferred Shares..........   17

         Section 10. Preferred Shares Record Date..............   19

         Section 11. Adjustment of Purchase Price, Number of 
                       Shares or Number of Rights..............   19

         Section 12. Certificate of Adjusted Purchase Price
                       or Number of Shares.....................   34

         Section 13. Consolidation, Merger or Sale or Transfer
                       of Assets or Earning Power..............   35

         Section 14. Fractional Rights and Fractional Shares...   37

         Section 15. Rights of Action..........................   40

         Section 16. Agreement of Right Holders................   40

         Section 17. Right Certificate Holder Not Deemed a
                       Stockholder.............................   41



                                      -i-<PAGE>

                                                                 Page





         Section 18. Concerning the Rights Agent...............   42

         Section 19. Merger or Consolidation or Change of
                       Name of Rights Agent....................   43

         Section 20. Duties of Rights Agent....................   45

         Section 21. Change of Rights Agent....................   48

         Section 22. Issuance of New Right Certificates........   50

         Section 23. Redemption................................   51

         Section 24. Exchange..................................   52

         Section 25. Notice of Certain Events..................   55

         Section 26. Notices...................................   57

         Section 27. Supplements and Amendments................   58

         Section 28. Successors................................   59

         Section 29. Benefits of this Agreement................   59

         Section 30. Severability..............................   59

         Section 31. Governing Law.............................   60

         Section 32. Counterparts..............................   60

         Section 33. Descriptive Headings......................   60

         Signatures............................................   61



         Exhibit A - Form of Right Certificate

         Exhibit B - Summary of Rights to Purchase Preferred 
                     Shares

         Exhibit C - Form of Certificate of Amendment of
                     Certificate of Incorporation








                                      -ii-<PAGE>





                   Agreement, dated as of June 24, 1997, between

         Schering-Plough Corporation, a New Jersey corporation (the

         "Company"), and The Bank of New York, a New York banking cor-

         poration (the "Rights Agent").


                   The Board of Directors of the Company has autho-

         rized and declared a dividend of one preferred share purchase

         right (a "Right") for each Common Share (as hereinafter de-

         fined) of the Company outstanding on July 10, 1997 (the

         "Record Date"), each Right representing the right to purchase

         one one-hundredth of a Preferred Share (as hereinafter de-

         fined), upon the terms and subject to the conditions herein

         set forth, and has further authorized and directed the issu-

         ance of one Right with respect to each Common Share that

         shall become outstanding between the Record Date and the ear-

         liest of the Distribution Date, the Redemption Date and the

         Final Expiration Date (as such terms are hereinafter de-

         fined).


                   Accordingly, 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 indi-

         cated:<PAGE>





                   (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 20% or more of the Com-

         mon Shares of the Company then outstanding, but shall not

         include the Company, any Subsidiary (as such term is herein-

         after defined) of the Company, any employee benefit plan of

         the Company or any Subsidiary of the Company, or any entity

         holding Common Shares for or pursuant to the terms of any

         such plan.  Notwithstanding the foregoing, no Person shall

         become an "Acquiring Person" as the result of an acquisition

         of Common Shares by the Company which, by reducing the number

         of shares outstanding, increases the proportionate number of

         shares beneficially owned by such Person to 20% or more of

         the Common Shares of the Company then outstanding; provided,

         however, that if a Person shall become the Beneficial Owner

         of 20% or more of the Common Shares of the Company then out-

         standing by reason of share purchases by the Company and

         shall, after such share purchases by the Company, become the

         Beneficial Owner of any additional Common Shares of the Com-

         pany, then such Person shall be deemed to be an "Acquiring

         Person."  Notwithstanding the foregoing, if the Board of Di-

         rectors of the Company determines in good faith that a Person

         who would otherwise be an "Acquiring Person," as defined pur-

         suant to the foregoing provisions of this paragraph (a), has




                                      -2-<PAGE>





         become such inadvertently, and such Person divests as prompt-

         ly as practicable a sufficient number of Common Shares so

         that such Person would no longer be an "Acquiring Person," as

         defined pursuant to the foregoing provisions of this para-

         graph (a), then such Person shall not be deemed to be an "Ac-

         quiring Person" for any purposes of this Agreement.


                   (b)  "Affiliate" and "Associate" shall have the

         respective meanings ascribed to such terms in Rule 12b-2 of

         the General Rules and Regulations under the Securities Ex-

         change Act of 1934, as amended (the "Exchange Act"), as in

         effect on the date of this Agreement.


                   (c)  A Person shall be deemed the "Beneficial Own-

         er" of and shall be deemed to "beneficially own" any secu-

         rities:


                 (i)    which such Person or any of such Person's Af-

              filiates or Associates beneficially owns, directly or

              indirectly;


                (ii)    which such Person or any of such Person's Af-

              filiates or Associates has (A) the right to acquire

              (whether such right is exercisable immediately or only

              after the passage of time) pursuant to any agreement,

              arrangement or understanding (other than customary

              agreements with and between underwriters and selling






                                      -3-<PAGE>





              group members with respect to a bona fide public offer-

              ing of securities), or upon the exercise of conversion

              rights, exchange rights, rights (other than these

              Rights), warrants or options, or otherwise; provided,

              however, that a Person shall not be deemed the Benefi-

              cial Owner of, or to beneficially own, securities ten-

              dered pursuant to a tender or exchange offer made by or

              on behalf of such Person or any of such Person's Af-

              filiates or Associates until such tendered securities

              are accepted for purchase or exchange; or (B) the right

              to vote pursuant to any agreement, arrangement or under-

              standing; provided, however, that a Person shall not be

              deemed the Beneficial Owner of, or to beneficially own,

              any security if the agreement, arrangement or under-

              standing to vote such security (1) arises solely from a

              revocable proxy or consent given to such Person in re-

              sponse to a public proxy or consent solicitation made

              pursuant to, and in accordance with, the applicable

              rules and regulations promulgated under the Exchange Act

              and (2) is not also then reportable on Schedule 13D un-

              der the Exchange Act (or any comparable or successor

              report); or


               (iii)    which are beneficially owned, directly or in-

              directly, by any other Person with which such Person or

              any of such Person's Affiliates or Associates has any





                                      -4-<PAGE>





              agreement, arrangement or understanding (other than cus-

              tomary agreements with and between underwriters and sel-

              ling group members with respect to a bona fide public

              offering of securities) for the purpose of acquiring,

              holding, voting (except to the extent contemplated by

              the proviso to Section 1(c)(ii)(B)) or disposing of any

              securities of the Company.


                   Notwithstanding anything in this definition of Ben-

         eficial Ownership to the contrary, the phrase "then outstand-

         ing," when used with reference to a Person's Beneficial Own-

         ership of securities of the Company, shall mean the number of

         such securities then issued and outstanding together with the

         number of such securities not then actually issued and out-

         standing which such Person would be deemed to own benefi-

         cially hereunder.


                   (d)  "Business Day" shall mean any day other than a

         Saturday, a Sunday, or a day on which banking institutions in

         the State of New York are authorized or obligated by law or

         executive order to close.


                   (e)  "Close of business" on any given date shall

         mean 5:00 P.M., New York City time, on such date; provided,

         however, that if such date is not a Business Day it shall

         mean 5:00 P.M., New York City time, on the next succeeding

         Business Day.





                                      -5-<PAGE>





                   (f)  "Common Shares" when used with reference to

         the Company shall mean the shares of common stock, par value

         $1.00 per share, of the Company.  "Common Shares" when used

         with reference to any Person other than the Company shall

         mean the capital stock (or equity interest) with the greatest

         voting power of such other Person or, if such other Person is

         a Subsidiary of another Person, the Person or Persons which

         ultimately control such first-mentioned Person.


                   (g)  "Distribution Date" shall have the meaning set

         forth in Section 3 hereof.


                   (h)  "Final Expiration Date" shall have the meaning

         set forth in Section 7 hereof.


                   (i)  "Person" shall mean any individual, firm, cor-

         poration or other entity, and shall include any successor (by

         merger or otherwise) of such entity.


                   (j)  "Preferred Shares" shall mean shares of Series

         A Junior Participating Preferred Stock, par value $1.00 per

         share, of the Company having the rights and preferences set

         forth in the Form of Certificate of Amendment of the Com-

         pany's Certificate of Incorporation attached to this Agree-

         ment as Exhibit C.


                   (k)  "Redemption Date" shall have the meaning set

         forth in Section 7 hereof.





                                      -6-<PAGE>





                   (l)  "Shares Acquisition Date" shall mean the first

         date of public announcement by the Company or an Acquiring

         Person that an Acquiring Person has become such.


                   (m)  "Subsidiary" of any Person shall mean any cor-

         poration or other entity of which a majority of the voting

         power of the voting equity securities or equity interest is

         owned, directly or indirectly, by such Person.


                   Section 2.  Appointment of Rights Agent.  The Com-

         pany 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 Shares) in accordance with

         the terms and conditions hereof, and the Rights Agent hereby

         accepts such appointment.  The Company may from time to time

         appoint such co-Rights Agents as it may deem necessary or

         desirable.


                   Section 3.  Issue of Right Certificates.  (a)  Un-

         til the earlier of (i) the tenth day after the Shares Acqui-

         sition Date or (ii) the tenth Business Day (or such later

         date as may be determined by action of the Board of Directors

         of the Company prior to such time as any Person becomes an

         Acquiring Person) after the date of the commencement by any

         Person (other than the Company, any Subsidiary of the Com-

         pany, any employee benefit plan of the Company or of any Sub-

         sidiary of the Company or any entity holding Common Shares



                                      -7-<PAGE>





         for or pursuant to the terms of any such plan) of, or of the

         first public announcement of the intention of 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 entity holding Common Shares for or

         pursuant to the terms of any such plan) to commence, a tender

         or exchange offer the consummation of which would result in

         any Person becoming the Beneficial Owner of Common Shares

         aggregating 20% or more of the then outstanding Common Shares

         (including any such date which is after the date of this

         Agreement and prior to the issuance of the Rights; the

         earlier of such dates being herein referred to as the

         "Distribution Date"), (x) the Rights will be evidenced

         (subject to the provisions of Section 3(b) hereof) by the

         certificates for Common Shares registered in the names of the

         holders thereof (which certificates shall also be deemed to

         be Right Certificates) and not by separate Right

         Certificates, and (y) the right to receive Right Certificates

         will be transferable only in connection with the transfer of

         Common Shares.  As soon as practicable after the Distribution

         Date, the Company will prepare and execute, the Rights Agent

         will countersign, and the Company will send or cause to be

         sent (and the Rights Agent will, if requested, send) by

         first-class, insured, postage-prepaid mail, to each record

         holder of Common Shares as of the close of business on the

         Distribution Date, at the address of such holder shown on the




                                      -8-<PAGE>





         records of the Company, a Right Certificate, in substantially

         the form of Exhibit A hereto (a "Right Certificate"),

         evidencing one Right for each Common Share so held.  As of

         the Distribution Date, the Rights will be evidenced solely by

         such Right Certificates.


                   (b)  On the Record Date, or as soon as practicable

         thereafter, the Company will send a copy of a Summary of

         Rights to Purchase Preferred Shares, in substantially the

         form of Exhibit B hereto (the "Summary of Rights"), by first-

         class, postage-prepaid mail, to each record holder of Common

         Shares as of the close of business on the Record Date, at the

         address of such holder shown on the records of the Company.

         With respect to certificates for Common Shares outstanding as

         of the Record Date, until the Distribution Date, the Rights

         will be evidenced by such certificates registered in the

         names of the holders thereof together with a copy of the Sum-

         mary of Rights attached thereto.  Until the Distribution Date

         (or the earlier of the Redemption Date or the Final Expira-

         tion Date), the surrender for transfer of any certificate for

         Common Shares outstanding on the Record Date, with or without

         a copy of the Summary of Rights attached thereto, shall also

         constitute the transfer of the Rights associated with the

         Common Shares represented thereby.


                   (c)  Certificates for Common Shares which become

         outstanding (including, without limitation, reacquired Common




                                      -9-<PAGE>





         Shares referred to in the last sentence of this paragraph

         (c)) after the Record Date but prior to the earliest of the

         Distribution Date, the Redemption Date or the Final Expira-

         tion Date shall have impressed on, printed on, written on or

         otherwise affixed to them a legend substantially in the form

         of the following:


              This certificate also evidences and entitles the holder
              hereof to certain rights as set forth in a Rights Agree-
              ment between Schering-Plough Corporation and The Bank of
              New York, dated as of June 24, 1997 (the "Rights Agree-
              ment"), the terms of which are hereby incorporated here-
              in by reference and a copy of which is on file at the
              principal executive offices of Schering-Plough Corpora-
              tion.  Under certain circumstances, as set forth in the
              Rights Agreement, such Rights will be evidenced by sepa-
              rate certificates and will no longer be evidenced by
              this certificate.  Schering-Plough Corporation will mail
              to the holder of this certificate a copy of the Rights
              Agreement without charge after receipt of a written re-
              quest therefor.  Under certain circumstances, as set
              forth in the Rights Agreement, Rights issued to any Per-
              son who becomes an Acquiring Person (as defined in the
              Rights Agreement) may become null and void.


         With respect to such certificates containing the foregoing

         legend, until the Distribution Date, the Rights associated

         with the Common Shares represented by such certificates shall

         be evidenced by such certificates alone, and the surrender

         for transfer of any such certificate shall also constitute

         the transfer of the Rights associated with the Common Shares

         represented thereby.  In the event that the Company purchases

         or acquires any Common Shares after the Record Date but prior

         to the Distribution Date, any Rights associated with such

         Common Shares shall be deemed cancelled and retired so that




                                      -10-<PAGE>





         the Company shall not be entitled to exercise any Rights as-

         sociated with the Common Shares which are no longer outstand-

         ing.


                   Section 4.  Form of Right Certificates.  The Right

         Certificates (and the forms of election to purchase Preferred

         Shares and of assignment to be printed on the reverse there-

         of) shall be substantially the same as Exhibit A hereto and

         may have such marks of identification or designation and such

         legends, summaries or endorsements printed thereon as the

         Company may deem appropriate and as are not inconsistent with

         the provisions of this Agreement, or as may be required to

         comply with any applicable law or with any rule or regulation

         made pursuant thereto or with any rule or regulation of any

         stock exchange or automated quotation system on which the

         Rights may from time to time be listed, or to conform to

         usage.  Subject to the provisions of Section 22 hereof, the

         Right Certificates shall entitle the holders thereof to pur-

         chase such number of one one-hundredths of a Preferred Share

         as shall be set forth therein at the price per one one-

         hundredth of a Preferred Share set forth therein (the "Pur-

         chase Price"), but the number of such one one-hundredths of a

         Preferred Share and the Purchase Price shall be subject to

         adjustment as provided herein.


                   Section 5.  Countersignature and Registration.  The

         Right Certificates shall be executed on behalf of the Company




                                      -11-<PAGE>





         by its Chairman of the Board, its Chief Executive Officer,

         its President, any of its Vice Presidents, or its Treasurer,

         either manually or by facsimile signature, shall have affixed

         thereto the Company's seal or a facsimile thereof, and shall

         be attested by the Secretary or an Assistant Secretary of the

         Company, either manually or by facsimile signature.  The

         Right Certificates shall be countersigned by the Rights

         Agent, either manually or by facsimile signature, and shall

         not be valid for any purpose unless countersigned.  In case

         any officer of the Company who shall have signed any of the

         Right Certificates shall cease to be such officer of the Com-

         pany before countersignature by the Rights Agent and issuance

         and delivery by the Company, such Right Certificates, never-

         theless, may be countersigned by the Rights Agent and issued

         and delivered by the Company with the same force and effect

         as though the person who signed such Right Certificates had

         not ceased to be such officer of the Company; and any Right

         Certificate may be signed on behalf of the Company by any

         person who, at the actual date of the execution of such Right

         Certificate, shall be a proper officer of the Company to sign

         such Right Certificate, although at the date of the execution

         of this Agreement any such person was not such an officer.


                   Following the Distribution Date, the Rights Agent

         will keep or cause to be kept, at its principal corporate

         trust office, books for registration and transfer of the

         Right Certificates issued hereunder.  Such books shall show



                                      -12-<PAGE>





         the names and addresses of the respective holders of the

         Right Certificates, the number of Rights evidenced on its

         face by each of the Right Certificates and the date of each

         of the Right Certificates.


                   Section 6.  Transfer, Split-Up, Combination and

         Exchange of Right Certificates; Mutilated, Destroyed, Lost or

         Stolen Right Certificates.  Subject to the provisions of Sec-

         tion 14 hereof, at any time after the close of business on

         the Distribution Date, and at or prior to the close of busi-

         ness on the earlier of the Redemption Date or the Final Expi-

         ration Date, any Right Certificate or Right Certificates

         (other than Right Certificates representing Rights that have

         become void pursuant to Section 11(a)(ii) hereof or that have

         been exchanged pursuant to Section 24 hereof) may be trans-

         ferred, split up, combined or exchanged for another Right

         Certificate or Right Certificates, entitling the registered

         holder to purchase a like number of one one-hundredths of a

         Preferred Share as the Right Certificate or Right Certifi-

         cates surrendered then entitled such holder to purchase.  Any

         registered holder desiring to transfer, split up, combine or

         exchange any Right Certificate or Right Certificates shall

         make such request in writing delivered to the Rights Agent,

         and shall surrender the Right Certificate or Right Certifi-

         cates to be transferred, split up, combined or exchanged at

         the principal corporate trust office of the Rights Agent.

         Thereupon the Rights Agent shall countersign and deliver to



                                      -13-<PAGE>





         the person entitled thereto a Right Certificate or Right Cer-

         tificates, as the case may be, as so requested.  The Company

         may require payment of a sum sufficient to cover any tax or

         governmental charge that may be imposed in connection with

         any transfer, split up, combination or exchange of Right Cer-

         tificates.


                   Upon receipt by the Company and the Rights Agent of

         evidence reasonably satisfactory to them of the loss, theft,

         destruction or mutilation of a Right Certificate, and, in

         case of loss, theft or destruction, of indemnity or security

         reasonably satisfactory to them, and, at the Company's re-

         quest, reimbursement to the Company and the Rights Agent of

         all reasonable expenses incidental thereto, and upon sur-

         render to the Rights Agent and cancellation of the Right Cer-

         tificate if mutilated, the Company will make and deliver a

         new Right Certificate of like tenor to the Rights Agent for

         delivery to the registered holder in lieu of the Right Cer-

         tificate so lost, stolen, destroyed or mutilated.


                   Section 7.  Exercise of Rights; Purchase Price;

         Expiration Date of Rights.  (a)  The registered holder of any

         Right Certificate may exercise the Rights evidenced thereby

         (except as otherwise provided herein) in whole or in part at

         any time after the Distribution Date upon surrender of the

         Right Certificate, with the form of election to purchase on

         the reverse side thereof duly executed, to the Rights Agent




                                      -14-<PAGE>





         at the principal corporate trust office of the Rights Agent,

         together with payment of the Purchase Price for each one

         one-hundredth of a Preferred Share as to which the Rights are

         exercised, at or prior to the earliest of (i) the close of

         business on July 10, 2007 (the "Final Expiration Date"), (ii)

         the time at which the Rights are redeemed as provided in Sec-

         tion 23 hereof (the "Redemption Date"), or (iii) the time at

         which such Rights are exchanged as provided in Section 24

         hereof.


                   (b)  The Purchase Price for each one one-hundredth

         of a Preferred Share purchasable pursuant to the exercise of

         a Right shall initially be $200, and shall be subject to ad-

         justment from time to time as provided in Section 11 or 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 Right Certificate represent-

         ing exercisable Rights, with the form of election to purchase

         duly executed, accompanied by payment of the Purchase Price

         for the shares to be purchased and an amount equal to any

         applicable transfer tax required to be paid by the holder of

         such Right Certificate in accordance with Section 9 hereof by

         certified check, cashier's check or money order payable to

         the order of the Company, the Rights Agent shall thereupon

         promptly (i) (A) requisition from any transfer agent of the

         Preferred Shares certificates for the number of Preferred




                                      -15-<PAGE>





         Shares to be purchased and the Company hereby irrevocably

         authorizes any such transfer agent to comply with all such

         requests, or (B) requisition from the depositary agent

         depositary receipts representing such number of one

         one-hundredths of a Preferred Share as are to be purchased

         (in which case certificates for the Preferred Shares repre-

         sented by such receipts shall be deposited by the transfer

         agent of the Preferred Shares with such depositary agent) and

         the Company hereby directs the depositary agent to comply

         with such request; (ii) when appropriate, requisition from

         the Company the amount of cash to be paid in lieu of issuance

         of fractional shares in accordance with Section 14 hereof;

         (iii) after receipt of such certificates or depositary

         receipts, cause the same to be delivered to or upon the order

         of the registered holder of such Right Certificate, regis-

         tered in such name or names as may be designated by such

         holder; and (iv) when appropriate, after receipt, deliver

         such cash to or upon the order of the registered holder of

         such Right Certificate.


                   (d)  In case the registered holder of any Right

         Certificate shall exercise less than all the Rights evidenced

         thereby, a new Right Certificate evidencing Rights equivalent

         to the Rights remaining unexercised shall be issued by the

         Rights Agent to the registered holder of such Right Certifi-

         cate or to his duly authorized assigns, subject to the provi-

         sions of Section 14 hereof.



                                      -16-<PAGE>






                   Section 8.  Cancellation and Destruction of Right

         Certificates.  All Right Certificates surrendered for the

         purpose of exercise, transfer, split-up, combination or ex-

         change shall, if surrendered to the Company or to any of its

         agents, be delivered to the Rights Agent for cancellation or

         in cancelled form, or, if surrendered to the Rights Agent,

         shall be cancelled by it, and no Right Certificates shall be

         issued in lieu thereof except as expressly permitted by any

         of the provisions of this Agreement.  The Company shall

         deliver to the Rights Agent for cancellation and retirement,

         and the Rights Agent shall so cancel and retire, any other

         Right Certificate purchased or acquired by the Company other-

         wise than upon the exercise thereof.  The Rights Agent shall

         deliver all cancelled Right Certificates to the Company, or

         shall, at the written request of the Company, destroy such

         cancelled Right Certificates, and in such case shall deliver

         a certificate of destruction thereof to the Company.


                   Section 9.  Availability of Preferred Shares.  The

         Company covenants and agrees that it will cause to be re-

         served and kept available out of its authorized and unissued

         Preferred Shares or any Preferred Shares held in its trea-

         sury, the number of Preferred Shares that will be sufficient

         to permit the exercise in full of all outstanding Rights in

         accordance with Section 7.  The Company covenants and agrees






                                      -17-<PAGE>





         that it will take all such action as may be necessary to en-

         sure that all Preferred Shares delivered upon exercise of

         Rights shall, at the time of delivery of the certificates for

         such Preferred Shares (subject to payment of the Purchase

         Price), be duly and validly authorized and issued and fully

         paid and nonassessable shares.


                   The Company further covenants and agrees that it

         will pay when due and payable any and all federal and state

         transfer taxes and charges which may be payable in respect of

         the issuance or delivery of the Right Certificates or of any

         Preferred Shares upon the exercise of Rights.  The Company

         shall not, however, be required to pay any transfer tax which

         may be payable in respect of any transfer or delivery of

         Right Certificates to a person other than, or the issuance or

         delivery of certificates or depositary receipts for the Pre-

         ferred Shares in a name other than that of, the registered

         holder of the Right Certificate evidencing Rights surrendered

         for exercise or to issue or to deliver any certificates or

         depositary receipts for Preferred Shares upon the exercise of

         any Rights until any such tax shall have been paid (any such

         tax being payable by the holder of such Right Certificate at

         the time of surrender) or until it has been established to

         the Company's reasonable satisfaction that no such tax is

         due.







                                      -18-<PAGE>





                   Section 10.  Preferred Shares Record Date.  Each

         person in whose name any certificate for Preferred Shares is

         issued upon the exercise of Rights shall for all purposes be

         deemed to have become the holder of record of the Preferred

         Shares represented thereby on, and such certificate shall be

         dated, the date upon which the Right Certificate evidencing

         such Rights was duly surrendered and payment of the Purchase

         Price (and any applicable transfer taxes) was made; provided,

         however, that if the date of such surrender and payment is a

         date upon which the Preferred Shares transfer books of the

         Company are closed, such person shall be deemed to have be-

         come the record holder of such shares on, and such certifi-

         cate shall be dated, the next succeeding Business Day on

         which the Preferred Shares transfer books of the Company are

         open.  Prior to the exercise of the Rights evidenced thereby,

         the holder of a Right Certificate shall not be entitled to

         any rights of a holder of Preferred Shares for which the

         Rights shall be exercisable, including, without limitation,

         the right to vote, to receive dividends or other distribu-

         tions or to exercise any preemptive rights, and shall not be

         entitled to receive any notice of any proceedings of the Com-

         pany, except as provided herein.


                   Section 11.  Adjustment of Purchase Price, Number

         of Shares or Number of Rights.  The Purchase Price, the num-

         ber of Preferred Shares covered by each Right and the number





                                      -19-<PAGE>





         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 Shares payable in Preferred Shares, (B) sub-

         divide the outstanding Preferred Shares, (C) combine the out-

         standing Preferred Shares into a smaller number of Preferred

         Shares or (D) issue any shares of its capital stock in a re-

         classification of the Preferred Shares (including any such

         reclassification in connection with a consolidation or merger

         in which the Company is the continuing or surviving corpora-

         tion), except as otherwise provided in this Section 11(a),

         the Purchase Price in effect at the time of the record date

         for such dividend or of the effective date of such subdivi-

         sion, combination or reclassification, and the number and

         kind of shares of capital stock issuable on such date, shall

         be proportionately adjusted so that the holder of any Right

         exercised after such time shall be entitled to receive the

         aggregate number and kind of shares of capital stock which,

         if such Right had been exercised immediately prior to such

         date and at a time when the Preferred Shares transfer books

         of the Company were open, he would have owned upon such exer-

         cise and been entitled to receive by virtue of such dividend,

         subdivision, combination or reclassification; provided, how-

         ever, that in no event shall the consideration to be paid

         upon the exercise of one Right be less than the aggregate par



                                      -20-<PAGE>





         value of the shares of capital stock of the Company issuable

         upon exercise of one Right.


                (ii)    Subject to Section 24 of this Agreement, in

         the event any Person becomes an Acquiring Person, each holder

         of a Right shall thereafter have a right to receive, upon

         exercise thereof at a price equal to the then current Pur-

         chase Price multiplied by the number of one one-hundredths of

         a Preferred Share for which a Right is then exercisable, in

         accordance with the terms of this Agreement and in lieu of

         Preferred Shares, such number of Common Shares of the Company

         as shall equal the result obtained by (x) multiplying the

         then current Purchase Price by the number of one one-

         hundredths of a Preferred Share for which a Right is then

         exercisable and dividing that product by (y) 50% of the then

         current per share market price of the Company's Common Shares

         (determined pursuant to Section 11(d) hereof) on the date of

         the occurrence of such event.  In the event that any Person

         shall become an Acquiring Person and the Rights shall then be

         outstanding, the Company shall not take any action which

         would eliminate or diminish the benefits intended to be af-

         forded by the Rights.


                   From and after the occurrence of such event, any

         Rights that are or were acquired or beneficially owned by any

         Acquiring Person (or any Associate or Affiliate of such Ac-

         quiring Person) shall be void and any holder of such Rights




                                      -21-<PAGE>





         shall thereafter have no right to exercise such Rights under

         any provision of this Agreement.  No Right Certificate shall

         be issued pursuant to Section 3 that represents Rights ben-

         eficially owned by an Acquiring Person whose Rights would be

         void pursuant to the preceding sentence or any Associate or

         Affiliate thereof; no Right Certificate shall be issued at

         any time upon the transfer of any Rights to an Acquiring Per-

         son whose Rights would be void pursuant to the preceding sen-

         tence or any Associate or Affiliate thereof or to any nominee

         of such Acquiring Person, Associate or Affiliate; and any

         Right Certificate delivered to the Rights Agent for transfer

         to an Acquiring Person whose Rights would be void pursuant to

         the preceding sentence shall be cancelled.


               (iii)    In the event that there shall not be suf-

         ficient Common Shares issued but not outstanding or autho-

         rized but unissued to permit the exercise in full of the

         Rights in accordance with the foregoing subparagraph (ii),

         the Company shall take all such action as may be necessary to

         authorize additional Common Shares for issuance upon exercise

         of the Rights.  In the event the Company shall, after good

         faith effort, be unable to take all such action as may be

         necessary to authorize such additional Common Shares, the

         Company shall substitute, for each Common Share that would

         otherwise be issuable upon exercise of a Right, a number of

         Preferred Shares or fraction thereof such that the current

         per share market price of one Preferred Share multiplied by



                                      -22-<PAGE>





         such number or fraction is equal to the current per share

         market price of one Common Share as of the date of issuance

         of such Preferred Shares or fraction thereof.


                   (b)  In case the Company shall fix a record date

         for the issuance of rights, options or warrants to all hold-

         ers of Preferred Shares entitling them (for a period expiring

         within 45 calendar days after such record date) to subscribe

         for or purchase Preferred Shares (or shares having the same

         rights, privileges and preferences as the Preferred Shares

         ("equivalent preferred shares")) or securities convertible

         into Preferred Shares or equivalent preferred shares at a

         price per Preferred Share or equivalent preferred share (or

         having a conversion price per share, if a security convert-

         ible into Preferred Shares or equivalent preferred shares)

         less than the then current per share market price of the Pre-

         ferred Shares (as defined in Section 11(d)) 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 Preferred

         Shares outstanding on such record date plus the number of

         Preferred Shares which the aggregate offering price of the

         total number of Preferred Shares and/or equivalent preferred

         shares so to be offered (and/or the aggregate initial conver-

         sion price of the convertible securities so to be offered)





                                      -23-<PAGE>





         would purchase at such current market price and the denomina-

         tor of which shall be the number of Preferred Shares out-

         standing on such record date plus the number of additional

         Preferred Shares and/or equivalent preferred shares to be

         offered for subscription or purchase (or into which the con-

         vertible securities so to be offered are initially convert-

         ible); provided, however, that in no event shall the consid-

         eration to be paid upon the exercise of one Right be less

         than the aggregate par value of the shares of capital stock

         of the Company issuable upon exercise of one Right.  In case

         such subscription price may be paid in a consideration part

         or all of which shall be in a form other than cash, the value

         of such consideration shall be as determined in good faith by

         the Board of Directors of the Company, whose determination

         shall be described in a statement filed with the Rights

         Agent.  Preferred Shares 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 suc-

         cessively whenever such a record date is fixed; and in the

         event that such rights, options or warrants are not so is-

         sued, 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.










                                      -24-<PAGE>





                   (c)  In case the Company shall fix a record date

         for the making of a distribution to all holders of the Pre-

         ferred Shares (including any such distribution made in con-

         nection with a consolidation or merger in which the Company

         is the continuing or surviving corporation) of evidences of

         indebtedness or assets (other than a regular quarterly cash

         dividend or a dividend payable in Preferred Shares) or sub-

         scription rights or warrants (excluding those referred to in

         Section 11(b) hereof), the Purchase Price to be in effect

         after such record date shall be determined by multiplying the

         Purchase Price in effect immediately prior to such record

         date by a fraction, the numerator of which shall be the then

         current per share market price of the Preferred Shares on

         such record date, less the fair market value (as determined

         in good faith by the Board of Directors of the Company, whose

         determination shall be described in a statement filed with

         the Rights Agent) of the portion of the assets or evidences

         of indebtedness so to be distributed or of such subscription

         rights or warrants applicable to one Preferred Share and the

         denominator of which shall be such current per share market

         price of the Preferred Shares; provided, however, that in no

         event shall the consideration to be paid upon the exercise of

         one Right be less than the aggregate par value of the shares

         of capital stock of the Company to be issued upon exercise of

         one Right.  Such adjustments shall be made successively when-

         ever such a record date is fixed; and in the event that such




                                      -25-<PAGE>





         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 here-

         under, the "current per share market price" of any security

         (a "Security" for the purpose of this Section 11(d)(i)) on

         any date shall be deemed to be the average of the daily clos-

         ing prices per share of such Security for the 30 consecutive

         Trading Days (as such term is hereinafter defined) immedi-

         ately prior to such date; provided, however, that in the

         event that the current per share market price of the Security

         is determined during a period following the announcement by

         the issuer of such Security of (A) a dividend or distribution

         on such Security payable in shares of such Security or secu-

         rities convertible into such shares, or (B) any subdivision,

         combination or reclassification of such Security and prior to

         the expiration of 30 Trading Days after the ex-dividend date

         for such dividend or distribution, or the record date for

         such subdivision, combination or reclassification, then, and

         in each such case, the current per share market price shall

         be appropriately adjusted to reflect the current market price

         per share equivalent of such Security.  The closing price for

         each day shall be the last sale price, regular way, or, in

         case no such sale takes place on such day, the average of the

         closing bid and asked prices, regular way, in either case as

         reported in the principal consolidated transaction reporting



                                      -26-<PAGE>





         system with respect to securities listed or admitted to trad-

         ing on the New York Stock Exchange or, if the Security is not

         listed or admitted to trading on the New York Stock Exchange,

         as reported in the principal consolidated transaction report-

         ing system with respect to securities listed on the principal

         national securities exchange on which the Security is listed

         or admitted to trading or, if the Security is not listed or

         admitted to trading on any national securities exchange, the

         last quoted price or, if not so quoted, the average of the

         high bid and low asked prices in the over-the-counter market,

         as reported by the National Association of Securities Deal-

         ers, Inc. Automated Quotations System ("NASDAQ") or such oth-

         er system then in use, or, if on any such date the Security

         is not quoted by any such organization, the average of the

         closing bid and asked prices as furnished by a professional

         market maker making a market in the Security selected by the

         Board of Directors of the Company.  The term "Trading Day"

         shall mean a day on which the principal national securities

         exchange on which the Security is listed or admitted to trad-

         ing is open for the transaction of business or, if the Secu-

         rity is not listed or admitted to trading on any national

         securities exchange, a Business Day.


                (ii)    For the purpose of any computation hereunder,

         the "current per share market price" of the Preferred Shares

         shall be determined in accordance with the method set forth





                                      -27-<PAGE>





         in Section 11(d)(i).  If the Preferred Shares are not pub-

         licly traded, the "current per share market price" of the

         Preferred Shares shall be conclusively deemed to be the cur-

         rent per share market price of the Common Shares as deter-

         mined pursuant to Section 11(d)(i) (appropriately adjusted to

         reflect any stock split, stock dividend or similar transac-

         tion occurring after the date hereof), multiplied by one hun-

         dred.  If neither the Common Shares nor the Preferred Shares

         are publicly held or so listed or traded, "current per share

         market price" shall mean the fair value per share as deter-

         mined in good faith by the Board of Directors of the Company,

         whose determination shall be described in a statement filed

         with the Rights Agent.


                   (e)  No adjustment in the Purchase Price shall be

         required unless such adjustment would require an increase or

         decrease of at least 1% in the Purchase Price; provided, how-

         ever, 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 near-

         est cent or to the nearest one one-millionth of a Preferred

         Share or one ten-thousandth of any other share or security as

         the case may be.  Notwithstanding the first sentence of this

         Section 11(e), any adjustment required by this Section 11

         shall be made no later than the earlier of (i) three years





                                      -28-<PAGE>





         from the date of the transaction which requires such adjust-

         ment or (ii) the date of the expiration of the right to exer-

         cise any Rights.


                   (f)  If as a result of an adjustment made pursuant

         to Section 11(a) hereof, the holder of any Right thereafter

         exercised shall become entitled to receive any shares of cap-

         ital stock of the Company other than Preferred Shares, there-

         after the number of such other shares so receivable upon

         exercise of any Right shall be subject to adjustment from

         time to time in a manner and on terms as nearly equivalent as

         practicable to the provisions with respect to the Preferred

         Shares contained in Section 11(a) through (c), inclusive, and

         the provisions of Sections 7, 9, 10 and 13 with respect to

         the Preferred Shares 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 here-

         under shall evidence the right to purchase, at the adjusted

         Purchase Price, the number of one one-hundredths of a Pre-

         ferred Share 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



                                      -29-<PAGE>





         Sections 11(b) and (c), each Right outstanding immediately

         prior to the making of such adjustment shall thereafter evi-

         dence the right to purchase, at the adjusted Purchase Price,

         that number of one one-hundredths of a Preferred Share (cal-

         culated to the nearest one one-millionth of a Preferred

         Share) obtained by (i) multiplying (x) the number of one

         one-hundredths of a share covered by a Right immediately pri-

         or 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 Pur-

         chase Price.


                   (i)  The Company may elect on or after the date of

         any adjustment of the Purchase Price to adjust the number of

         Rights, in substitution for any adjustment in the number of

         one one-hundredths of a Preferred Share purchasable upon the

         exercise of a Right.  Each of the Rights outstanding after

         such adjustment of the number of Rights shall be exercisable

         for the number of one one-hundredths of a Preferred Share for

         which a Right was exercisable immediately prior to such ad-

         justment.  Each Right held of record prior to such adjustment

         of the number of Rights shall become that number of Rights

         (calculated to the nearest one ten-thousandth) obtained by

         dividing the Purchase Price in effect immediately prior to

         adjustment of the Purchase Price by the Purchase Price in

         effect immediately after adjustment of the Purchase Price.



                                      -30-<PAGE>





         The Company shall make a public announcement of its election

         to adjust the number of Rights, indicating the record date

         for the adjustment, and, if known at the time, the amount of

         the adjustment to be made.  This record date may be the date

         on which the Purchase Price is adjusted or any day thereaf-

         ter, but, if the Right Certificates have been issued, shall

         be at least 10 days later than the date of the public an-

         nouncement.  If Right Certificates have been issued, upon

         each adjustment of the number of Rights pursuant to this Sec-

         tion 11(i), the Company shall, as promptly as practicable,

         cause to be distributed to holders of record of Right Cer-

         tificates on such record date Right Certificates evidencing,

         subject to Section 14 hereof, the additional Rights to which

         such holders shall be entitled as a result of such adjust-

         ment, or, at the option of the Company, shall cause to be

         distributed to such holders of record in substitution and

         replacement for the Right Certificates held by such holders

         prior to the date of adjustment, and upon surrender thereof,

         if required by the Company, new Right Certificates evidencing

         all the Rights to which such holders shall be entitled after

         such adjustment.  Right Certificates so to be distributed

         shall be issued, executed and countersigned in the manner

         provided for herein and shall be registered in the names of

         the holders of record of Right Certificates on the record

         date specified in the public announcement.






                                      -31-<PAGE>





                   (j)  Irrespective of any adjustment or change in

         the Purchase Price or the number of one one-hundredths of a

         Preferred Share issuable upon the exercise of the Rights, the

         Right Certificates theretofore and thereafter issued may con-

         tinue to express the Purchase Price and the number of one

         one-hundredths of a Preferred Share which were expressed in

         the initial Right Certificates issued hereunder.


                   (k)  Before taking any action that would cause an

         adjustment reducing the Purchase Price below one

         one-hundredth of the then par value, if any, of the Preferred

         Shares 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 val-

         idly and legally issue fully paid and nonassessable Preferred

         Shares at such adjusted Purchase Price.


                   (l)  In any case in which this Section 11 shall

         require that an adjustment in the Purchase Price be made ef-

         fective as of a record date for a specified event, the Com-

         pany may elect to defer until the occurrence of such event

         the issuing to the holder of any Right exercised after such

         record date of the Preferred Shares and other capital stock

         or securities of the Company, if any, issuable upon such ex-

         ercise over and above the Preferred Shares and other capital

         stock or securities of the Company, if any, issuable upon

         such exercise on the basis of the Purchase Price in effect




                                      -32-<PAGE>





         prior to such adjustment; provided, however, that the Company

         shall deliver to such holder a due bill or other appropriate

         instrument evidencing such holder's right to receive such

         additional shares upon the occurrence of the event requiring

         such adjustment.


                   (m)  Anything 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 ad-

         justments expressly required by this Section 11, as and to

         the extent that it in its sole discretion shall determine to

         be advisable in order that any consolidation or subdivision

         of the Preferred Shares, issuance wholly for cash of any Pre-

         ferred Shares at less than the current market price, issuance

         wholly for cash of Preferred Shares or securities which by

         their terms are convertible into or exchangeable for Pre-

         ferred Shares, dividends on Preferred Shares payable in Pre-

         ferred Shares or issuance of rights, options or warrants re-

         ferred to hereinabove in Section 11(b), hereafter made by the

         Company to holders of its Preferred Shares shall not be tax-

         able to such stockholders.


                   (n)  In the event that at any time after the date

         of this Agreement and prior to the Distribution Date, the

         Company shall (i) declare or pay any dividend on the Common

         Shares payable in Common Shares or (ii) effect a subdivision,






                                      -33-<PAGE>





         combination or consolidation of the Common Shares (by reclas-

         sification or otherwise than by payment of dividends in Com-

         mon Shares) into a greater or lesser number of Common Shares,

         then in any such case (A) the number of one one-hundredths of

         a Preferred Share purchasable after such event upon proper

         exercise of each Right shall be determined by multiplying the

         number of one one-hundredths of a Preferred Share so purchas-

         able immediately prior to such event by a fraction, the nu-

         merator of which is the number of Common Shares outstanding

         immediately before such event and the denominator of which is

         the number of Common Shares outstanding immediately after

         such event, and (B) each Common Share outstanding immediately

         after such event shall have issued with respect to it that

         number of Rights which each Common Share outstanding immedi-

         ately prior to such event had issued with respect to it.  The

         adjustments provided for in this Section 11(n) shall be made

         successively whenever such a dividend is declared or paid or

         such a subdivision, combination or consolidation is effected.


                   Section 12.  Certificate of Adjusted Purchase Price

         or Number of Shares.  Whenever an adjustment is made as pro-

         vided in Section 11 or 13 hereof, the Company shall promptly

         (a) prepare a certificate setting forth and describing such

         adjustment, and a brief statement of the facts accounting for

         such adjustment, (b) file with the Rights Agent and with each

         transfer agent for the Common Shares or the Preferred Shares

         a copy of such certificate and (c) mail a brief summary



                                      -34-<PAGE>





         thereof to each holder of a Right Certificate in accordance

         with Section 25 hereof.


                   Section 13.  Consolidation, Merger or Sale or

         Transfer of Assets or Earning Power.  In the event, directly

         or indirectly, at any time after a Person has become an Ac-

         quiring Person, (a) the Company shall consolidate with, or

         merge with and into, any other Person, (b) any Person shall

         consolidate with the Company, or merge with and into the Com-

         pany and the Company shall be the continuing or surviving

         corporation of such merger and, in connection with such merg-

         er, all or part of the Common Shares shall be changed into or

         exchanged for stock or other securities of any other Person

         (or the Company) or cash or any other property, or (c) the

         Company shall sell or otherwise transfer (or one or more of

         its Subsidiaries shall sell or otherwise transfer), in one or

         more transactions, assets or earning power aggregating 50% or

         more of the assets or earning power of the Company and its

         Subsidiaries (taken as a whole) to any other Person other

         than the Company or one or more of its wholly-owned Subsid-

         iaries, then, and in each such case, proper provision shall

         be made so that (i) each holder of a Right (except as other-

         wise provided herein) shall thereafter have the right to re-

         ceive, upon the exercise thereof at a price equal to the then

         current Purchase Price multiplied by the number of one one-

         hundredths of a Preferred Share for which a Right is then

         exercisable, in accordance with the terms of this Agreement



                                      -35-<PAGE>





         and in lieu of Preferred Shares, such number of Common Shares

         of such other Person (including the Company as successor

         thereto or as the surviving corporation) as shall equal the

         result obtained by (A) multiplying the then current Purchase

         Price by the number of one one-hundredths of a Preferred

         Share for which a Right is then exercisable and dividing that

         product by (B) 50% of the then current per share market price

         of the Common Shares of such other Person (determined pursu-

         ant to Section 11(d) hereof) on the date of consummation of

         such consolidation, merger, sale or transfer; (ii) the issuer

         of such Common Shares shall thereafter be liable for, and

         shall assume, by virtue of such consolidation, merger, sale

         or transfer, all the obligations and duties of the Company

         pursuant to this Agreement; (iii) the term "Company" shall

         thereafter be deemed to refer to such issuer; and (iv) such

         issuer shall take such steps (including, but not limited to,

         the reservation of a sufficient number of its Common Shares

         in accordance with Section 9 hereof) in connection with such

         consummation as may be necessary to assure that the provi-

         sions hereof shall thereafter be applicable, as nearly as

         reasonably may be, in relation to the Common Shares thereaf-

         ter deliverable upon the exercise of the Rights.  The Company

         shall not consummate any such consolidation, merger, sale or

         transfer unless prior thereto the Company and such issuer

         shall have executed and delivered to the Rights Agent a

         supplemental agreement so providing.  The Company shall not




                                      -36-<PAGE>





         enter into any transaction of the kind referred to in this
         
         Section 13 if at the time of such transaction there are any

         rights, warrants, instruments or securities outstanding or

         any agreements or arrangements which, as a result of the con-

         summation of such transaction, would eliminate or substan-

         tially diminish the benefits intended to be afforded by the

         Rights.  The provisions of this Section 13 shall similarly

         apply to successive mergers or consolidations or sales or

         other transfers.


                   Section 14.  Fractional Rights and Fractional

         Shares.  (a)  The Company shall not be required to issue

         fractions of Rights or to distribute Right Certificates which

         evidence fractional Rights.  In lieu of such fractional

         Rights, there shall be paid to the registered holders of the

         Right Certificates with regard to which such fractional

         Rights would otherwise be issuable, an amount in cash equal

         to the same fraction of the current market value of a whole

         Right.  For the purposes of this Section 14(a), the current

         market value of a whole Right shall be the closing price of

         the Rights for the Trading Day immediately prior to the date

         on which such fractional Rights would have been otherwise

         issuable.  The closing price for any day shall be the last

         sale price, regular way, or, in case no such sale takes place

         on such day, the average of the closing bid and asked prices,









                                      -37-<PAGE>





         regular way, in either case as reported in the principal con-

         solidated transaction reporting system with respect to secu-

         rities listed or admitted to trading on the New York Stock

         Exchange or, if the Rights are not listed or admitted to

         trading on the New York Stock Exchange, as reported in the

         principal consolidated transaction reporting system with re-

         spect to securities listed on the principal national securi-

         ties exchange on which the Rights are listed or admitted to

         trading or, if the Rights are not listed or admitted to trad-

         ing on any national securities exchange, the last quoted

         price or, if not so quoted, the average of the high bid and

         low asked prices in the over-the-counter market, as reported

         by NASDAQ or such other system then in use or, if on any such

         date the Rights are not quoted by any such organization, the

         average of the closing bid and asked prices as furnished by a

         professional market maker making a market in the Rights se-

         lected by the Board of Directors of the Company.  If on any

         such date no such market maker is making a market in the

         Rights, the fair value of the Rights on such date as deter-

         mined in good faith by the Board of Directors of the Company

         shall be used.


                   (b)  The Company shall not be required to issue

         fractions of Preferred Shares (other than fractions which are

         integral multiples of one one-hundredth of a Preferred Share)

         upon exercise of the Rights or to distribute certificates





                                      -38-<PAGE>





         which evidence fractional Preferred Shares (other than frac-

         tions which are integral multiples of one one-hundredth of a

         Preferred Share).  Fractions of Preferred Shares in integral

         multiples of one one-hundredth of a Preferred Share may, at

         the election of the Company, be evidenced by depositary re-

         ceipts, pursuant to an appropriate agreement between the Com-

         pany and a depositary selected by it; provided, that such

         agreement shall provide that the holders of such depositary

         receipts shall have all the rights, privileges and prefer-

         ences to which they are entitled as beneficial owners of the

         Preferred Shares represented by such depositary receipts.  In

         lieu of fractional Preferred Shares that are not integral

         multiples of one one-hundredth of a Preferred Share, the Com-

         pany shall pay to the registered holders of Right Certifi-

         cates at the time such Rights are exercised as herein pro-

         vided an amount in cash equal to the same fraction of the

         current market value of one Preferred Share.  For the pur-

         poses of this Section 14(b), the current market value of a

         Preferred Share shall be the closing price of a Preferred

         Share (as determined pursuant to the second sentence of Sec-

         tion 11(d)(i) hereof) for the Trading Day immediately prior

         to the date of such exercise.


                   (c)  The holder of a Right by the acceptance of the

         Right expressly waives his right to receive any fractional

         Rights or any fractional shares upon exercise of a Right (ex-

         cept as provided above).



                                      -39-<PAGE>






                   Section 15.  Rights of Action.  All rights of ac-

         tion in respect of this Agreement, excepting the rights of

         action given to the Rights Agent under Section 18 hereof, are

         vested in the respective registered holders of the Right Cer-

         tificates (and, prior to the Distribution Date, the regis-

         tered holders of the Common Shares); and any registered hold-

         er of any Right Certificate (or, prior to the Distribution

         Date, of the Common Shares), without the consent of the

         Rights Agent or of the holder of any other Right Certificate

         (or, prior to the Distribution Date, of the Common Shares),

         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 Right

         Certificate in the manner provided in such Right Certificate

         and in this Agreement.  Without limiting the foregoing or any

         remedies available to the holders of Rights, it is specifi-

         cally 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 obliga-

         tions under, and injunctive relief against actual or threat-

         ened violations of the obligations of any Person subject to,

         this Agreement.


                   Section 16.  Agreement of Right Holders.  Every

         holder of a Right, by accepting the same, consents and agrees




                                      -40-<PAGE>





         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 Shares;


                   (b)  after the Distribution Date, the Right Cer-

         tificates are transferable only on the registry books of the

         Rights Agent if surrendered at the principal corporate trust

         office of the Rights Agent, duly endorsed or accompanied by a

         proper instrument of transfer; and


                   (c)  the Company and the Rights Agent may deem and

         treat the person in whose name the Right Certificate (or,

         prior to the Distribution Date, the associated Common Shares

         certificate) is registered as the absolute owner thereof and

         of the Rights evidenced thereby (notwithstanding any nota-

         tions of ownership or writing on the Right Certificate or the

         associated Common Shares certificate made by anyone other

         than the Company or the Rights Agent) for all purposes what-

         soever, and neither the Company nor the Rights Agent shall be

         affected by any notice to the contrary.


                   Section 17.  Right Certificate Holder Not Deemed a

         Stockholder.  No holder, as such, of any Right Certificate

         shall be entitled to vote, receive dividends or be deemed for

         any purpose the holder of the Preferred Shares or any other




                                      -41-<PAGE>





         securities of the Company which may at any time be issuable

         on the exercise of the Rights represented thereby, nor shall

         anything contained herein or in any Right Certificate be con-

         strued to confer upon the holder of any Right Certificate, as

         such, any of the rights of a stockholder of the Company or

         any right to vote for the election of directors or upon any

         matter submitted to stockholders at any meeting thereof, or

         to give or withhold consent to any corporate action, or to

         receive notice of meetings or other actions affecting stock-

         holders (except as provided in Section 25 hereof), or to re-

         ceive dividends or subscription rights, or otherwise, until

         the Right or Rights evidenced by such Right Certificate shall

         have been exercised in accordance with the provisions hereof.


                   Section 18.  Concerning the Rights Agent.  The Com-

         pany agrees to pay to the Rights Agent reasonable compensa-

         tion for all services rendered by it hereunder and, from time

         to time, on demand of the Rights Agent, its reasonable ex-

         penses 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 Com-

         pany also agrees to indemnify the Rights Agent for, and to

         hold it harmless against, any loss, liability, or expense,

         incurred without negligence, bad faith or willful misconduct

         on the part of the Rights Agent, for anything done or omitted

         by the Rights Agent in connection with the acceptance and

         administration of this Agreement, including the costs and



                                      -42-<PAGE>





         expenses of defending against any claim of liability in the

         premises.


                   The Rights Agent shall be protected and shall incur

         no liability for, or in respect of any action taken, suffered

         or omitted by it in connection with, its administration of

         this Agreement in reliance upon any Right Certificate or cer-

         tificate for the Preferred Shares or Common Shares 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 acknowl-

         edged, by the proper person or persons, or otherwise upon the

         advice of counsel as set forth in Section 20 hereof.


                   Section 19.  Merger or Consolidation or Change of

         Name of Rights Agent.  Any corporation into which the Rights

         Agent or any successor Rights Agent may be merged or with

         which it may be consolidated, or any corporation resulting

         from any merger or consolidation to which the Rights Agent or

         any successor Rights Agent shall be a party, or any corpora-

         tion succeeding to the stock transfer or corporate trust

         business of the Rights Agent or any successor Rights Agent,

         shall be the successor to the Rights Agent under this Agree-

         ment without the execution or filing of any paper or any fur-

         ther act on the part of any of the parties hereto; provided,




                                      -43-<PAGE>





         that such corporation would be eligible for appointment as a

         successor Rights Agent under the provisions of Section 21

         hereof.  In case at the time such successor Rights Agent

         shall succeed to the agency created by this Agreement, any of

         the Right Certificates shall have been countersigned but not

         delivered, any such successor Rights Agent may adopt the

         countersignature of the predecessor Rights Agent and deliver

         such Right Certificates so countersigned; and in case at that

         time any of the Right Certificates shall not have been

         countersigned, any successor Rights Agent may countersign

         such Right Certificates either in the name of the predecessor

         Rights Agent or in the name of the successor Rights Agent;

         and in all such cases such Right Certificates shall have the

         full force provided in the Right Certificates and in this

         Agreement.


                   In case at any time the name of the Rights Agent

         shall be changed and at such time any of the Right Certifi-

         cates shall have been countersigned but not delivered, the

         Rights Agent may adopt the countersignature under its prior

         name and deliver Right Certificates so countersigned; and in

         case at that time any of the Right Certificates shall not

         have been countersigned, the Rights Agent may countersign

         such Right Certificates either in its prior name or in its

         changed name; and in all such cases such Right Certificates

         shall have the full force provided in the Right Certificates

         and in this Agreement.



                                      -44-<PAGE>






                   Section 20.  Duties of Rights Agent.  The Rights

         Agent undertakes the duties and obligations imposed by this

         Agreement upon the following terms and conditions, by all of

         which the Company and the holders of Right Certificates, by

         their acceptance thereof, shall be bound:


                   (a)  The Rights Agent may consult with legal coun-

         sel (who may be legal counsel for the Company), and the opin-

         ion of such counsel shall be full and complete authorization

         and protection to the Rights Agent as to any action taken or

         omitted by it in good faith and in accordance with such opin-

         ion.


                   (b)  Whenever in the performance of its duties un-

         der this Agreement the Rights Agent shall deem it necessary

         or desirable that any fact or matter be proved or established

         by the Company prior to taking or suffering any action here-

         under, 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 one of the Chairman of the Board, the Chief

         Executive Officer, the President, any Vice President, the

         Treasurer or the Secretary of the Company and delivered to

         the Rights Agent; and such certificate shall be full authori-

         zation to the Rights Agent for any action taken or suffered

         in good faith by it under the provisions of this Agreement in

         reliance upon such certificate.



                                      -45-<PAGE>






                   (c)  The Rights Agent shall be liable hereunder to

         the Company and any other Person only for its own negligence,

         bad faith or willful misconduct.


                   (d)  The Rights Agent shall not be liable for or by

         reason of any of the statements of fact or recitals contained

         in this Agreement or in the Right Certificates (except its

         countersignature thereof) or be required to verify the same,

         but all such statements and recitals are and shall be deemed

         to have been made by the Company only.


                   (e)  The Rights Agent shall not be under any re-

         sponsibility in respect of the validity of this Agreement or

         the execution and delivery hereof (except the due execution

         hereof by the Rights Agent) or in respect of the validity or

         execution of any Right Certificate (except its countersigna-

         ture thereof); nor shall it be responsible for any breach by

         the Company of any covenant or condition contained in this

         Agreement or in any Right Certificate; nor shall it be re-

         sponsible for any change in the exercisability of the Rights

         (including the Rights becoming void pursuant to Section

         11(a)(ii) hereof) or any adjustment in the terms of the

         Rights (including the manner, method or amount thereof) pro-

         vided for in Section 3, 11, 13, 23 or 24, or the ascertaining

         of the existence of facts that would require any such change

         or adjustment (except with respect to the exercise of Rights

         evidenced by Right Certificates after actual notice that such



                                      -46-<PAGE>





         change or adjustment is required); nor shall it by any act

         hereunder be deemed to make any representation or warranty as

         to the authorization or reservation of any Preferred Shares

         to be issued pursuant to this Agreement or any Right Certifi-

         cate or as to whether any Preferred Shares will, when issued,

         be validly authorized and issued, fully paid and nonassess-

         able.


                   (f)  The Company agrees that it will perform, ex-

         ecute, acknowledge and deliver or cause to be performed, ex-

         ecuted, acknowledged and delivered all such further and other

         acts, instruments and assurances as may reasonably be re-

         quired 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 di-

         rected to accept instructions with respect to the performance

         of its duties hereunder from any one of the Chairman of the

         Board, the Chief Executive Officer, the President, any Vice

         President, the Secretary or the Treasurer of the Company, and

         to apply to such officers for advice or instructions in con-

         nection with its duties, and it shall not be liable for any

         action taken or suffered by it in good faith in accordance

         with instructions of any such officer or for any delay in

         acting while waiting for those instructions.


                   (h)  The Rights Agent and any stockholder, direc-

         tor, officer or employee of the Rights Agent may buy, sell or



                                      -47-<PAGE>





         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 here-

         in shall preclude the Rights Agent from acting in any other

         capacity for the Company or for any other legal entity.


                   (i)  The Rights Agent may execute and exercise any

         of the rights or powers hereby vested in it or perform any

         duty hereunder either itself or by or through its attorneys

         or agents, and the Rights Agent shall not be answerable or

         accountable for any act, default, neglect or misconduct of

         any such attorneys or agents or for any loss to the Company

         resulting from any such act, default, neglect or misconduct,

         provided reasonable care was exercised in the selection and

         continued employment thereof.


                   Section 21.  Change of Rights Agent.  The Rights

         Agent or any successor Rights Agent may resign and be dis-

         charged from its duties under this Agreement upon 30 days'

         notice in writing mailed to the Company and to each transfer

         agent of the Common Shares or Preferred Shares by registered

         or certified mail, and to the holders of the Right Certifi-

         cates by first-class mail.  The Company may remove the Rights

         Agent or any successor Rights Agent upon 30 days' notice in

         writing, mailed to the Rights Agent or successor Rights




                                      -48-<PAGE>





         Agent, as the case may be, and to each transfer agent of the

         Common Shares or Preferred Shares by registered or certified

         mail, and to the holders of the Right Certificates by first--

         class mail.  If the Rights Agent shall resign or be removed

         or shall otherwise become incapable of acting, the Company

         shall appoint a successor to the Rights Agent.  If the Com-

         pany shall fail to make such appointment within a period of

         30 days after giving notice of such removal or after it has

         been notified in writing of such resignation or incapacity by

         the resigning or incapacitated Rights Agent or by the holder

         of a Right Certificate (who shall, with such notice, submit

         his Right Certificate for inspection by the Company), then

         the registered holder of any Right Certificate may apply to

         any court of competent jurisdiction for the appointment of a

         new Rights Agent.  Any successor Rights Agent, whether ap-

         pointed by the Company or by such a court, shall be a corpo-

         ration organized and doing business under the laws of the

         United States or of the State of New York (or of any other

         state of the United States so long as such corporation is

         authorized to do business as a banking institution in the

         State of New York), in good standing, having an office in the

         State of New York, which is authorized under such laws to

         exercise corporate trust or stock transfer powers and is sub-

         ject to supervision or examination by federal or state au-

         thority and which has at the time of its appointment as

         Rights Agent a combined capital and surplus of at least $50




                                      -49-<PAGE>





         million.  After appointment, the successor Rights Agent shall

         be vested with the same powers, rights, duties and responsi-

         bilities 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 neces-

         sary 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 Shares or Preferred Shares, and mail a

         notice thereof in writing to the registered holders of the

         Right Certificates.  Failure to give any notice provided for

         in this Section 21, however, or any defect therein, shall not

         affect the legality or validity of the resignation or removal

         of the Rights Agent or the appointment of the successor

         Rights Agent, as the case may be.


                   Section 22.  Issuance of New Right Certificates.

         Notwithstanding any of the provisions of this Agreement or of

         the Rights to the contrary, the Company may, at its option,

         issue new Right Certificates evidencing Rights in such form

         as may be approved by its Board of Directors to reflect any

         adjustment or change in the Purchase Price and the number or

         kind or class of shares or other securities or property pur-

         chasable under the Right Certificates made in accordance with

         the provisions of this Agreement.



                                      -50-<PAGE>






                   Section 23.  Redemption.  (a)  The Board of Direc-

         tors of the Company may, at its option, at any time prior to

         such time as any Person becomes an Acquiring Person, redeem

         all but not less than all the then outstanding Rights at a

         redemption price of $.01 per Right, appropriately adjusted to

         reflect any stock split, stock dividend or similar transac-

         tion occurring after the date hereof (such redemption price

         being hereinafter referred to as the "Redemption Price").

         The redemption of the Rights by the Board of Directors may be

         made effective at such time, on such basis and with such con-

         ditions as the Board of Directors in its sole discretion may

         establish.


                   (b)  Immediately upon the action of the Board of

         Directors of the Company ordering the redemption of the

         Rights pursuant to paragraph (a) of this Section 23, and

         without any further action and without any notice, the right

         to exercise the Rights will terminate and the only right

         thereafter of the holders of Rights shall be to receive the

         Redemption Price.  The Company shall promptly give public

         notice of any such redemption; provided, however, that the

         failure to give, or any defect in, any such notice shall not

         affect the validity of such redemption.  Within 10 days after

         such action of the Board of Directors ordering the redemption

         of the Rights, the Company shall mail a notice of redemption

         to all the holders of the then outstanding Rights at their




                                      -51-<PAGE>





         last addresses as they appear upon the registry books of the

         Rights Agent or, prior to the Distribution Date, on the reg-

         istry books of the transfer agent for the Common Shares.  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.  Neither

         the Company nor any of its Affiliates or Associates may re-

         deem, acquire or purchase for value any Rights at any time in

         any manner other than that specifically set forth in this

         Section 23 or in Section 24 hereof, and other than in connec-

         tion with the purchase of Common Shares prior to the Distri-

         bution Date.


                   Section 24.  Exchange.  (a)  The Board of Directors

         of the Company may, at its option, at any time after any Per-

         son becomes an Acquiring Person, exchange all or part of the

         then outstanding and exercisable Rights (which shall not in-

         clude Rights that have become void pursuant to the provisions

         of Section 11(a)(ii) hereof) for Common Shares at an exchange

         ratio of one Common Share per Right, appropriately adjusted

         to reflect any stock split, stock dividend or similar trans-

         action occurring after the date hereof (such exchange ratio

         being hereinafter referred to as the "Exchange Ratio").  Not-

         withstanding the foregoing, the Board of Directors shall not

         be empowered to effect such exchange at any time after any





                                      -52-<PAGE>





         Person (other than the Company, any Subsidiary of the Com-

         pany, any employee benefit plan of the Company or any such

         Subsidiary, or any entity holding Common Shares for or pursu-

         ant to the terms of any such plan), together with all Affili-

         ates and Associates of such Person, becomes the Beneficial

         Owner of 50% or more of the Common Shares then outstanding.


                   (b)  Immediately upon the action of the Board of

         Directors of the Company ordering the exchange of any Rights

         pursuant to paragraph (a) of this Section 24 and without any

         further action 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

         Common Shares 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 the Common Shares 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



                                      -53-<PAGE>





         be effected pro rata based on the number of Rights (other

         than Rights which have become void pursuant to the provisions

         of Section 11(a)(ii) hereof) held by each holder of Rights.


                   (c)  In the event that there shall not be suffi-

         cient Common Shares 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

         Common Shares for issuance upon exchange of the Rights.  In

         the event the Company shall, after good faith effort, be

         unable to take all such action as may be necessary to autho-

         rize such additional Common Shares, the Company shall substi-

         tute, for each Common Share that would otherwise be issuable

         upon exchange of a Right, a number of Preferred Shares or

         fraction thereof such that the current per share market price

         of one Preferred Share multiplied by such number or fraction

         is equal to the current per share market price of one Common

         Share as of the date of issuance of such Preferred Shares or

         fraction thereof.


                   (d)  The Company shall not be required to issue

         fractions of Common Shares or to distribute certificates

         which evidence fractional Common Shares.  In lieu of such

         fractional Common Shares, the Company shall pay to the regis-

         tered holders of the Right Certificates with regard to which

         such fractional Common Shares would otherwise be issuable an




                                      -54-<PAGE>





         amount in cash equal to the same fraction of the current mar-

         ket value of a whole Common Share.  For the purposes of this

         paragraph (d), the current market value of a whole Common

         Share shall be the closing price of a Common Share (as deter-

         mined pursuant to the second sentence of Section 11(d)(i)

         hereof) for the Trading Day immediately prior to the date of

         exchange pursuant to this Section 24.


                   Section 25.  Notice of Certain Events.  (a)  In

         case the Company shall propose (i) to pay any dividend

         payable in stock of any class to the holders of its Preferred

         Shares or to make any other distribution to the holders of

         its Preferred Shares (other than a regular quarterly cash

         dividend), (ii) to offer to the holders of its Preferred

         Shares rights or warrants to subscribe for or to purchase any

         additional Preferred Shares or shares of stock of any class

         or any other securities, rights or options, (iii) to effect

         any reclassification of its Preferred Shares (other than a

         reclassification involving only the subdivision of outstand-

         ing Preferred Shares), (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 50%

         or more of the assets or earning power of the Company and its

         Subsidiaries (taken as a whole) to, any other Person, (v) to

         effect the liquidation, dissolution or winding up of the

         Company, or



                                      -55-<PAGE>





         (vi) to declare or pay any dividend on the Common Shares pay-

         able in Common Shares or to effect a subdivision, combination

         or consolidation of the Common Shares (by reclassification or

         otherwise than by payment of dividends in Common Shares),

         then, in each such case, the Company shall give to each hold-

         er of a Right Certificate, in accordance with Section 26

         hereof, a notice of such proposed action, which shall specify

         the record date for the purposes of such stock dividend, or

         distribution of rights or warrants, or the date on which such

         reclassification, consolidation, merger, sale, transfer, liq-

         uidation, dissolution, or winding up is to take place and the

         date of participation therein by the holders of the Common

         Shares and/or Preferred Shares, if any such date is to be

         fixed, and such notice shall be so given in the case of any

         action covered by clause (i) or (ii) above at least 10 days

         prior to the record date for determining holders of the Pre-

         ferred Shares for purposes of such action, and in the case of

         any such other action, at least 10 days prior to the date of

         the taking of such proposed action or the date of participa-

         tion therein by the holders of the Common Shares and/or Pre-

         ferred Shares, whichever shall be the earlier.


                   (b)  In case the event set forth in Section

         11(a)(ii) hereof shall occur, then the Company shall as soon

         as practicable thereafter give to each holder of a Right Cer-

         tificate, in accordance with Section 26 hereof, a notice of

         the occurrence of such event, which notice shall describe



                                      -56-<PAGE>





         such event and the consequences of such event to holders of

         Rights under Section 11(a)(ii) hereof.


                   Section 26.  Notices.  Notices or demands autho-

         rized by this Agreement to be given or made by the Rights

         Agent or by the holder of any Right Certificate to or on the

         Company shall be sufficiently given or made if sent by

         first-class mail, postage prepaid, addressed (until another

         address is filed in writing with the Rights Agent) as fol-

         lows:


                        Schering-Plough Corporation
                        One Giralda Farms
                        Madison, New Jersey  07940-1000
                        Attention:  Secretary


         Subject to the provisions of Section 21 hereof, any notice or

         demand authorized by this Agreement to be given or made by

         the Company or by the holder of any Right Certificate to or

         on the Rights 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 fol-

         lows:


                        The Bank of New York
                        101 Barclay Street
                        New York, New York  10287
                        Attention:  Kathleen Flaherty


         Notices or demands authorized by this Agreement to be given

         or made by the Company or the Rights Agent to the holder of

         any Right Certificate shall be sufficiently given or made if



                                      -57-<PAGE>





         sent by first-class mail, postage prepaid, addressed to such

         holder at the address of such holder as shown on the registry

         books of the Company.


                  Section 27.  Supplements and Amendments.  The Com-

         pany may from time to time supplement or amend this Agreement

         without the approval of any holders of Right Certificates in

         order to cure any ambiguity, to correct or supplement any

         provision contained herein which may be defective or incon-

         sistent with any other provisions herein, or to make any oth-

         er provisions with respect to the Rights which the Company

         may deem necessary or desirable, any such supplement or

         amendment to be evidenced by a writing signed by the Company

         and the Rights Agent; provided, however, that from and after

         such time as any Person becomes an Acquiring Person, this

         Agreement shall not be amended or supplemented in any manner

         which would adversely affect the interests of the holders of

         Rights.  Without limiting the foregoing, the Company may at

         any time prior to such time as any Person becomes an Acquir-

         ing Person amend this Agreement to lower the thresholds set

         forth in Sections 1(a) and 3(a) to not less than the greater

         of (i) the sum of .001% and the largest percentage of the

         outstanding Common Shares then known by the Company to be

         beneficially owned by any Person (other than the Company, any

         Subsidiary of the Company, any employee benefit plan of the







                                      -58-<PAGE>





         Company or any Subsidiary of the Company, or any entity hold-

         ing Common Shares for or pursuant to the terms of any such

         plan) and (ii) 10%.


                  Section 28.  Successors.  All the covenants and pro-

         visions of this Agreement by or for the benefit of the Com-

         pany or the Rights Agent shall bind and inure to the benefit

         of their respective successors and assigns hereunder.


                   Section 29.  Benefits of this Agreement.  Nothing

         in this Agreement shall be construed to give to any person or

         corporation other than the Company, the Rights Agent and the

         registered holders of the Right Certificates (and, prior to

         the Distribution Date, the Common Shares) any legal or equi-

         table right, remedy or claim under this Agreement; but this

         Agreement shall be for the sole and exclusive benefit of the

         Company, the Rights Agent and the registered holders of the

         Right Certificates (and, prior to the Distribution Date, the

         Common Shares).


                   Section 30.  Severability.  If any term, provision,

         covenant or restriction of this Agreement is held by a court

         of competent jurisdiction or other authority to be invalid,

         void or unenforceable, the remainder of the terms, provi-

         sions, covenants and restrictions of this Agreement shall

         remain in full force and effect and shall in no way be af-

         fected, impaired or invalidated.





                                      -59-<PAGE>





                   Section 31.  Governing Law.  This Agreement and

         each Right Certificate issued hereunder shall be deemed to be

         a contract made under the laws of the State of New Jersey and

         for all purposes shall be governed by and construed in ac-

         cordance with the laws of such State applicable to contracts

         to be made and performed entirely within such State.


                   Section 32.  Counterparts.  This Agreement may be

         executed in any number of counterparts and each of such coun-

         terparts shall for all purposes be deemed to be an original,

         and all such counterparts shall together constitute but one

         and the same instrument.


                   Section 33.  Descriptive Headings.  Descriptive

         headings of the several Sections of this Agreement are in-

         serted for convenience only and shall not control or affect

         the meaning or construction of any of the provisions hereof.
























                                      -60-<PAGE>





                   IN WITNESS WHEREOF, the parties hereto have caused

         this Agreement to be duly executed and attested, all as of

         the day and year first above written.


                                          SCHERING-PLOUGH CORPORATION

         Attest:


         By /s/ Carole Bauer              By /s/ E. Kevin Moore                
            Carole Bauer                     E. Kevin Moore
            Assistant Secretary              Vice President and
                                              Treasurer



         Attest:                          THE BANK OF NEW YORK, as
                                            Rights Agent


         By /s/ Kathleen A. Flaherty      By /s/ Raymond Romanski              
            Kathleen A. Flaherty             Raymond A. Romanski
            Assistant Vice President         Vice President
            






























                                      -61-<PAGE>
            

                                                         Exhibit A







                           Form of Right Certificate


         Certificate No. R-                                     Rights



                  NOT EXERCISABLE AFTER JULY 10, 2007 OR EARLIER IF
                  REDEMPTION OR EXCHANGE OCCURS.  THE RIGHTS ARE SUB-
                  JECT TO REDEMPTION AT $.01 PER RIGHT AND TO EXCHANGE
                  ON THE TERMS SET FORTH IN THE RIGHTS AGREEMENT.


                               Right Certificate

                          SCHERING-PLOUGH CORPORATION


                  This certifies that                     , or regis-
         tered assigns, is the registered owner of the number of
         Rights set forth above, each of which entitles the owner
         thereof, subject to the terms, provisions and conditions of
         the Rights Agreement, dated as of June 24, 1997 (the "Rights
         Agreement"), between Schering-Plough Corporation, a New Jer-
         sey corporation (the "Company"), and The Bank of New York
         (the "Rights Agent"), to purchase from the Company at any
         time after the Distribution Date (as such term is defined in
         the Rights Agreement) and prior to 5:00 P.M., New York City
         time, on July 10, 2007 at the principal corporate trust
         office of the Rights Agent, or at the office of its successor
         as Rights Agent, one one-hundredth of a fully paid non-
         assessable share of Series A Junior Participating Preferred
         Stock, par value $1.00 per share (the "Preferred Shares"), of
         the Company, at a purchase price of $200 per one one-
         hundredth of a Preferred Share (the "Purchase Price"), upon
         presentation and surrender of this Right Certificate with the
         Form of Election to Purchase duly executed.  The number of
         Rights evidenced by this Right Certificate (and the number of
         one one-hundredths of a Preferred Share which may be pur-
         chased upon exercise hereof) set forth above, and the Pur-
         chase Price set forth above, are the number and Purchase
         Price as of July 10, 1997, based on the Preferred Shares as
         constituted at such date.  As provided in the Rights Agree-
         ment, the Purchase Price and the number of one one-hundredths
         of a Preferred Share which may be purchased upon the exercise
         of the Rights evidenced by this Right Certificate are subject
         to modification and adjustment upon the happening of certain
         events.




                                      A-1<PAGE>







                  This Right Certificate is subject to all of the
         terms, provisions and conditions of the Rights Agreement,
         which terms, provisions and conditions are hereby incorpo-
         rated herein by reference and made a part hereof and to which
         Rights Agreement reference is hereby made for a full descrip-
         tion of the rights, limitations of rights, obligations, du-
         ties and immunities hereunder of the Rights Agent, the Com-
         pany and the holders of the Right Certificates.  Copies of
         the Rights Agreement are on file at the principal executive
         offices of the Company and the above-mentioned offices of the
         Rights Agent.

                  This Right Certificate, with or without other Right
         Certificates, upon surrender at the principal corporate trust
         office of the Rights Agent, may be exchanged for another
         Right Certificate or Right Certificates of like tenor and
         date evidencing Rights entitling the holder to purchase a
         like aggregate number of Preferred Shares as the Rights evi-
         denced by the Right Certificate or Right Certificates sur-
         rendered shall have entitled such holder to purchase.  If
         this Right Certificate shall be exercised in part, the holder
         shall be entitled to receive upon surrender hereof another
         Right Certificate or Right Certificates for the number of
         whole Rights not exercised.

                  Subject to the provisions of the Rights Agreement,
         the Rights evidenced by this Certificate (i) may be redeemed
         by the Company at a redemption price of $.01 per Right or
         (ii) may be exchanged in whole or in part for Preferred
         Shares or shares of the Company's Common Stock, par value
         $1.00 per share.

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

                  No holder of this Right Certificate shall be en-
         titled to vote or receive dividends or be deemed for any pur-
         pose the holder of the Preferred Shares or of any other secu-
         rities 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 direc-
         tors or upon any matter submitted to stockholders at any



                                      A-2<PAGE>







         meeting thereof, or to give or withhold consent to any corpo-
         rate action, or to receive notice of meetings or other ac-
         tions affecting stockholders (except as provided in the
         Rights Agreement), or to receive dividends or subscription
         rights, or otherwise, until the Right or Rights evidenced by
         this Right Certificate shall have been exercised as provided
         in the Rights Agreement.

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

                  WITNESS the facsimile signature of the proper offic-
         ers of the Company and its corporate seal.  Dated as of
                   , 19__.

         ATTEST:                           SCHERING-PLOUGH CORPORATION


                                      By                              


         Countersigned:


         THE BANK OF NEW YORK


         By                                 
                  Authorized Signatory






















                                      A-3<PAGE>







                   Form of Reverse Side of Right Certificate


                               FORM OF ASSIGNMENT


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


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


         Dated:                        , 19__



                                                                     
                                       Signature


         Signature Guaranteed:

                   Signatures must be guaranteed by a member firm of a
         registered national securities exchange, a member of the Na-
         tional Association of Securities Dealers, Inc., or a com-
         mercial bank or trust company having an office or correspon-
         dent in the United States.

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

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


                                                                     
                                       Signature

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


                                      A-4<PAGE>







             Form of Reverse Side of Right Certificate -- continued


                          FORM OF ELECTION TO PURCHASE

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


         To:  SCHERING-PLOUGH CORPORATION

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

         Please insert social security
         or other identifying number

                                                                      
                        (Please print name and address)
                                                                      

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

         Please insert social security
         or other identifying number

                                                                      
                        (Please print name and address)
                                                                      

         Dated:                    , 19__


                                                                      
                                      Signature

         Signature Guaranteed:

                  Signatures must be guaranteed by a member firm of a
         registered national securities exchange, a member of the Na-
         tional Association of Securities Dealers, Inc., or a com-
         mercial bank or trust company having an office or correspon-
         dent in the United States.



                                      A-5<PAGE>







             Form of Reverse Side of Right Certificate -- continued

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

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



                                                                      
                                      Signature

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



                                     NOTICE

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

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


















                                      A-6<PAGE>
                                                                  Exhibit B









                         SUMMARY OF RIGHTS TO PURCHASE
                                PREFERRED SHARES


                   On June 24, 1997, the Board of Directors of
         Schering-Plough Corporation (the "Company") declared a divi-
         dend of one preferred share purchase right (a "Right") for
         each outstanding share of common stock, par value $1.00 per
         share (the "Common Shares"), of the Company.  The dividend is
         payable on July 10, 1997 (the "Record Date") to the stock-
         holders of record on that date.  Each Right entitles the reg-
         istered holder to purchase from the Company one one-hundredth
         of a share of Series A Junior Participating Preferred Stock,
         par value $1.00 per share (the "Preferred Shares"), of the
         Company at a price of $200 per one one-hundredth of a Pre-
         ferred 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 The Bank of New York, as Rights Agent (the "Rights
         Agent").

                   Until 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") have acquired ben-
         eficial ownership of 20% or more of the outstanding Common
         Shares or (ii) 10 business days (or such later date as may be
         determined by action of the Board of Directors of the Company
         prior to such time as any person or group of affiliated per-
         sons becomes an Acquiring Person) following the commencement
         of, or announcement of an intention to make, a tender offer
         or exchange offer the consummation of which would result in
         the beneficial ownership by a person or group of 20% or more
         of the outstanding Common Shares (the earlier of such dates
         being called the "Distribution Date"), the Rights will be
         evidenced, with respect to any of the Common Share certifi-
         cates outstanding as of the Record Date, by such Common Share
         certificate with a copy of this Summary of Rights attached
         thereto.

                   The Rights Agreement provides that, until the Dis-
         tribution Date (or earlier redemption or expiration of the
         Rights), the Rights will be transferred with and only with
         the Common Shares.  Until the Distribution Date (or earlier
         redemption or expiration of the Rights), new Common Share
         certificates issued after the Record Date upon transfer or




                                         B-1<PAGE>







         new issuance of Common Shares will contain a notation incor-
         porating the Rights Agreement by reference.  Until the Dis-
         tribution Date (or earlier redemption or expiration of the
         Rights), the surrender for transfer of any certificates for
         Common Shares outstanding as of the Record Date, even without
         such notation or a copy of this Summary of Rights being at-
         tached thereto, will also constitute the transfer of the
         Rights associated with the Common Shares represented by such
         certificate.  As soon as practicable following the Distribu-
         tion Date, separate certificates evidencing the Rights
         ("Right Certificates") will be mailed to holders of record of
         the Common Shares as of the close of business on the Distri-
         bution Date and such separate Right Certificates alone will
         evidence the Rights.

                   The Rights are not exercisable until the Distribu-
         tion Date.  The Rights will expire on July 10, 2007 (the "Fi-
         nal Expiration Date"), unless the Final Expiration Date is
         extended or unless the Rights are earlier redeemed or ex-
         changed by the Company, in each case, as described below.

                   The Purchase Price payable, and the number of Pre-
         ferred Shares or other securities or property issuable, upon
         exercise of the Rights are subject to adjustment from time to
         time to prevent dilution (i) in the event of a stock dividend
         on, or a subdivision, combination or reclassification of, the
         Preferred Shares, (ii) upon the grant to holders of the Pre-
         ferred Shares of certain rights or warrants to subscribe for
         or purchase Preferred Shares at a price, or securities con-
         vertible into Preferred Shares with a conversion price, less
         than the then-current market price of the Preferred Shares or
         (iii) upon the distribution to holders of the Preferred
         Shares of evidences of indebtedness or assets (excluding reg-
         ular periodic cash dividends paid out of earnings or retained
         earnings or dividends payable in Preferred Shares) or of sub-
         scription rights or warrants (other than those referred to
         above).

                   The number of outstanding Rights and the number of
         one one-hundredths of a Preferred Share issuable upon exer-
         cise of each Right are also subject to adjustment in the
         event of a stock split of the Common Shares or a stock divi-
         dend on the Common Shares payable in Common Shares or subdi-
         visions, consolidations or combinations of the Common Shares
         occurring, in any such case, prior to the Distribution Date.

                   Preferred Shares purchasable upon exercise of the
         Rights will not be redeemable.  Each Preferred Share will be
         entitled to a minimum preferential quarterly dividend payment
         of $1 per share but will be entitled to an aggregate dividend


                                         B-2<PAGE>







         of 100 times the dividend declared per Common Share.  In the
         event of liquidation, the holders of the Preferred Shares
         will be entitled to a minimum preferential liquidation pay-
         ment of $100 per share but will be entitled to an aggregate
         payment of 100 times the payment made per Common Share.  Each
         Preferred Share will have 100 votes, voting together with the
         Common Shares.  Finally, in the event of any merger, con-
         solidation or other transaction in which Common Shares are
         exchanged, each Preferred Share will be entitled to receive
         100 times the amount received per Common Share.  These rights
         are protected by customary antidilution provisions.

                   Because of the nature of the Preferred Shares' div-
         idend, liquidation and voting rights, the value of the one
         one-hundredth interest in a Preferred Share purchasable upon
         exercise of each Right should approximate the value of one
         Common Share.

                   In the event that the Company is acquired in a
         merger or other business combination transaction or 50% or
         more of its consolidated assets or earning power are sold
         after a person or group has become an Acquiring Person, prop-
         er provision will be made so that each holder of a Right will
         thereafter have the right to receive, upon the exercise
         thereof at the then current exercise price of the Right, that
         number of shares of common stock of the acquiring company
         which at the time of such transaction will have a market val-
         ue of two times the exercise price of the Right.  In the
         event that any person or group of affiliated or associated
         persons becomes an Acquiring Person, proper provision shall
         be made so that each holder of a Right, other than Rights
         beneficially owned by the Acquiring Person (which will there-
         after be void), will thereafter have the right to receive
         upon exercise that number of Common Shares having a market
         value of two times the exercise price of the Right.

                   At any time after any person or group becomes an
         Acquiring Person and prior to the acquisition by such person
         or group of 50% or more of the outstanding Common Shares, the
         Board of Directors of the Company may exchange the Rights
         (other than Rights owned by such person or group which will
         have become void), in whole or in part, at an exchange ratio
         of one Common Share, or one one-hundredth of a Preferred
         Share (or of a share of a class or series of the Company's
         preferred stock having equivalent rights, preferences and
         privileges), per Right (subject to adjustment).

                   With certain exceptions, no adjustment in the Pur-
         chase Price will be required until cumulative adjustments
         require an adjustment of at least 1% in such Purchase Price.


                                         B-3<PAGE>







         No fractional Preferred Shares will be issued (other than
         fractions which are integral multiples of one one-hundredth
         of a Preferred Share, which may, at the election of the Com-
         pany, be evidenced by depositary receipts) and in lieu there-
         of, an adjustment in cash will be made based on the market
         price of the Preferred Shares on the last trading day prior
         to the date of exercise.

                   At any time prior to the acquisition by a person or
         group of affiliated or associated persons of beneficial own-
         ership of 20% or more of the outstanding Common Shares, the
         Board of Directors of the Company may redeem the Rights in
         whole, but not in part, at a price of $.01 per Right (the
         "Redemption Price").  The redemption of the Rights may be
         made effective at such time on such basis with such condi-
         tions as the Board of Directors in its sole discretion may
         establish.  Immediately upon any redemption of the Rights,
         the right to exercise the Rights will terminate and the only
         right of the holders of Rights will be to receive the Redemp-
         tion Price.

                   The terms of the Rights may be amended by the Board
         of Directors of the Company without the consent of the hold-
         ers of the Rights, including an amendment to lower certain
         thresholds described above to not less than the greater of
         (i) the sum of .001% and the largest percentage of the out-
         standing Common Shares then known to the Company to be ben-
         eficially owned by any person or group of affiliated or asso-
         ciated persons and (ii) 10%, except that from and after such
         time as any person or group of affiliated or associated per-
         sons becomes an Acquiring Person no such amendment may ad-
         versely affect the interests of the holders of the Rights.

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

                   A copy of the Rights Agreement has been filed with
         the Securities and Exchange Commission as an Exhibit to a
         Registration Statement on Form 8-A dated         , 1997.  A
         copy of the Rights Agreement is available free of charge from
         the Company.  This summary description of the Rights does not
         purport to be complete and is qualified in its entirety by
         reference to the Rights Agreement, which is hereby incorpo-
         rated herein by reference.






                                         B-4<PAGE>
                                                                  Exhibit C






                                      FORM

                                       of

                            CERTIFICATE OF AMENDMENT

                                       of

                          CERTIFICATE OF INCORPORATION

                                       of

                          SCHERING-PLOUGH CORPORATION

                      (Pursuant to Title 14A:7-2(2) of the
                      New Jersey Business Corporation Act)

                                                        



         It is hereby certified that:

                   1.  The name of the corporation is Schering-Plough
         Corporation (hereinafter called the "Corporation"); and

                   2.  The Certificate of Incorporation of the Corpo-
         ration, as amended (the "Certificate of Incorporation") is
         hereby amended so that the designation and number of shares
         of the class and series acted upon in the following resolu-
         tion, and the relative rights, preferences and limitations of
         such class and series, are as stated in such resolution.

                   3.  The following resolution was duly adopted by
         the Board of Directors of the Corporation as required by Sub-
         section 14A: 7-2(3) of the New Jersey Business Corporation
         Act at a meeting duly called and held on June 24, 1997:

                   RESOLVED, that pursuant to the authority granted to
         and vested in the Board of Directors of the Corporation in
         accordance with the provisions of Article Fifth of its Cer-
         tificate of Incorporation, the Board of Directors hereby
         amends and restates in their entirety the designation and
         number, and the relative rights, preferences and limitation
         of the Series A Junior Participating Preferred Stock of the
         Corporation as follows:







                                         C-1<PAGE>







                   Series A Junior Participating Preferred Stock:

                   Section I.  Designation and Amount.  The shares of
         such series shall be designated as "Series A Junior Partici-
         pating Preferred Stock" (the "Series A Preferred Stock") and
         the number of shares constituting the Series A Preferred
         Stock shall be 12,000,000.  Such number of shares may be
         increased or decreased by resolution of the Board of Direc-
         tors; provided, that no decrease shall reduce the number of
         shares of Series A Preferred Stock to a number less than the
         number of shares then outstanding plus the number of shares
         reserved for issuance upon the exercise of outstanding
         options, rights or warrants or upon the conversion of any
         outstanding securities issued by the Corporation convertible
         into Series A Preferred Stock.

                   Section II.  Dividends and Distributions.

                   A.   Subject to the rights of the holders of any
              shares of any series of Preferred Stock (or any similar
              stock) ranking prior and superior to the Series A Pre-
              ferred Stock with respect to dividends, the holders of
              shares of Series A Preferred Stock, in preference to the
              holders of Common Stock, par value $1 per share (the
              "Common Stock"), of the Corporation, and of any other
              junior stock, shall be entitled to receive, when, as and
              if declared by the Board of Directors out of funds
              legally available for the purpose, quarterly dividends
              payable in cash on the first day of March, June, Septem-
              ber and December in each year (each such date being
              referred to herein as a "Quarterly Dividend Payment
              Date"), commencing on the first Quarterly Dividend Pay-
              ment Date after the first issuance of a share or frac-
              tion of a share of Series A Preferred Stock, in an
              amount per share (rounded to the nearest cent) equal to
              the greater of (a) $1 or (b) subject to the provision
              for adjustment hereinafter set forth, 100 times the
              aggregate per share amount of all cash dividends, and
              100 times the aggregate per share amount (payable in
              kind) of all non-cash dividends or other distributions,
              other than a dividend payable in shares of Common Stock
              or a subdivision of the outstanding shares of Common
              Stock (by reclassification or otherwise), declared on
              the Common Stock since the immediately preceding Quar-
              terly Dividend Payment Date or, with respect to the
              first Quarterly Dividend Payment Date, since the first
              issuance of any share or fraction of a share of Series A
              Preferred Stock.  In the event the Corporation shall at
              any time declare or pay any dividend on the Common Stock




                                         C-2<PAGE>







              payable in shares of Common Stock, or effect a subdivi-
              sion or combination or consolidation of the outstanding
              shares of Common Stock (by reclassification or otherwise
              than by payment of a dividend in shares of Common Stock)
              into a greater or lesser number of shares of Common
              Stock, then in each such case the amount to which
              holders of shares of Series A Preferred Stock were
              entitled immediately 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 A Preferred Stock as provided
              in paragraph (A) of this Section immediately after it
              declares a dividend or distribution on the Common Stock
              (other than a dividend payable in shares of Common
              Stock); provided that, in the event no dividend or dis-
              tribution 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 $1 per share on the Series A Pre-
              ferred Stock shall nevertheless be payable on such sub-
              sequent Quarterly Dividend Payment Date.

                   C.   Dividends shall begin to accrue and be cumula-
              tive on outstanding shares of Series A Preferred Stock
              from the Quarterly Dividend Payment Date next preceding
              the date of issue of such shares, unless the date of
              issue of such shares is prior to the record date for the
              first Quarterly Dividend Payment Date, in which case
              dividends on such shares shall begin to accrue from the
              date of issue of such shares, or unless the date of is-
              sue is a Quarterly Dividend Payment Date or is a date
              after the record date for the determination of holders
              of shares of Series A Preferred Stock entitled to
              receive a quarterly dividend and before such Quarterly
              Dividend Payment Date, in either of which events such
              dividends shall 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 A Preferred Stock in an
              amount less than the total amount of such dividends at
              the time accrued and payable on such shares shall be
              allocated pro rata on a share-by-share basis among all
              such shares at the time outstanding.  The Board of



                                         C-3<PAGE>







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

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

                   A.   Subject to the provision for adjustment here-
              inafter set forth, each share of Series A Preferred
              Stock shall entitle the holder thereof to 100 votes on
              all matters submitted to a vote of the stockholders of
              the Corporation.  In the event the Corporation shall at
              any time declare or pay any dividend on the Common Stock
              payable in shares of Common Stock, or effect a subdivi-
              sion or combination or consolidation of the outstanding
              shares of Common Stock (by reclassification or otherwise
              than by payment of a dividend in shares of Common Stock)
              into a greater or lesser number of shares of Common
              Stock, then in each such case the number of votes per
              share to which holders of shares of Series A Preferred
              Stock were entitled immediately prior to such event
              shall be adjusted by multiplying such number by a frac-
              tion, 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 herein, in any
              other Certificate of Designations creating a series of
              Preferred Stock or any similar stock, or by law, the
              holders of shares of Series A Preferred Stock and the
              holders of shares of Common Stock and any other capital
              stock of the Corporation having general voting rights
              shall vote together as one class on all matters submit-
              ted to a vote of stockholders of the Corporation.

                   C.   Except as set forth herein, or as otherwise
              provided by law, holders of Series A 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.






                                         C-4<PAGE>







                   Section IV.  Certain Restrictions.

                   A.   Whenever quarterly dividends or other divi-
              dends or distributions payable on the Series A Preferred
              Stock as provided in Section 2 are in arrears, thereaf-
              ter and until all accrued and unpaid dividends and dis-
              tributions, whether or not declared, on shares of Series
              A Preferred Stock outstanding shall have been paid in
              full, the Corporation shall not:

                       1.  declare or pay dividends, or make any other
                   distributions, on any shares of stock ranking jun-
                   ior (either as to dividends or upon liquidation,
                   dissolution or winding up) to the Series A Pre-
                   ferred Stock;

                       2.  declare or pay dividends, 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 A Pre-
                   ferred Stock, except dividends paid ratably on the
                   Series A Preferred Stock and all such parity stock
                   on which dividends are payable or in arrears in
                   proportion to the total amounts to which the hold-
                   ers of all such shares are then entitled;

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

                       4.  redeem or purchase or otherwise acquire for
                   consideration any shares of Series A Preferred
                   Stock, or any shares of stock ranking on a parity
                   with the Series A Preferred Stock, except in ac-
                   cordance 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 consider-
                   ation of the respective annual dividend rates and
                   other relative rights and preferences of the re-
                   spective series and classes, shall determine in
                   good faith will result in fair and equitable treat-
                   ment among the respective series or classes.



                                         C-5<PAGE>







                   B.   The Corporation shall not permit any subsid-
              iary 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 V.  Reacquired Shares.  Any shares of
         Series A Preferred Stock purchased or otherwise acquired by
         the Corporation in any manner whatsoever shall be retired and
         cancelled promptly after the acquisition thereof.  All such
         shares shall upon their cancellation become authorized but
         unissued shares of Preferred Stock and may be reissued as
         part of a new series of Preferred Stock subject to the condi-
         tions and restrictions on issuance set forth herein, in the
         Certificate of Incorporation, or in any other Certificate of
         Designations creating a series of Preferred Stock or any sim-
         ilar stock or as otherwise required by law.

                   Section VI.  Liquidation, Dissolution or Winding
         Up.  Upon any liquidation, dissolution or winding up of the
         Corporation, no distribution shall be made (1) to the holders
         of shares of stock ranking junior (either as to dividends or
         upon liquidation, dissolution or winding up) to the Series A
         Preferred Stock unless, prior thereto, the holders of shares
         of Series A Preferred Stock shall have received $100 per
         share, plus an amount equal to accrued and unpaid dividends
         and distributions thereon, whether or not declared, to the
         date of such payment, provided that the holders of shares of
         Series A Preferred Stock shall be entitled to receive an ag-
         gregate amount per share, subject to the provision for
         adjustment hereinafter set forth, equal to 100 times the ag-
         gregate amount to be distributed per share to holders of
         shares of Common Stock, or (2) to the holders of shares of
         stock ranking on a parity (either as to dividends or upon
         liquidation, dissolution or winding up) with the Series A
         Preferred Stock, except distributions made ratably on the
         Series A Preferred Stock and all such parity stock in propor-
         tion to the total amounts to which the holders of all such
         shares are entitled upon such liquidation, dissolution or
         winding up.  In the event the Corporation shall at any time
         declare or pay any dividend on the Common Stock payable in
         shares of Common Stock, or effect a subdivision or combina-
         tion or consolidation of the outstanding shares of Common
         Stock (by reclassification or otherwise than by payment of a
         dividend in shares of Common Stock) into a greater or lesser
         number of shares of Common Stock, then in each such case the
         aggregate amount to which holders of shares of Series A Pre-
         ferred Stock were entitled immediately prior to such event
         under the proviso in clause (1) of the preceding sentence



                                         C-6<PAGE>







         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 VII.  Consolidation, Merger, etc.  In case
         the Corporation shall enter into any consolidation, merger,
         combination or other transaction in which the shares of Com-
         mon Stock are exchanged for or changed into other stock or
         securities, cash and/or any other property, then in any such
         case each share of Series A Preferred Stock shall at the same
         time be similarly exchanged or changed into an amount per
         share, subject to the provision for adjustment hereinafter
         set forth, equal to 100 times the aggregate amount of stock,
         securities, cash 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 Cor-
         poration shall at any time declare or pay any dividend on the
         Common Stock payable in shares of Common Stock, or effect a
         subdivision or combination or consolidation of the outstand-
         ing shares of Common Stock (by reclassification or otherwise
         than by payment of a dividend in shares of Common Stock) into
         a greater or lesser number of shares of Common Stock, then in
         each such case the amount set forth in the preceding sentence
         with respect to the exchange or change of shares of Series A
         Preferred Stock shall be adjusted by multiplying such amount
         by a fraction, the numerator of which is the number of shares
         of Common Stock outstanding immediately after such event and
         the denominator of which is the number of shares of Common
         Stock that were outstanding immediately prior to such event.

                   Section VIII.  No Redemption.  The shares of Series
         A Preferred Stock shall not be redeemable.

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

                   Section X.  Amendment.  The Certificate of Incor-
         poration of the Corporation shall not be amended in any man-
         ner which would materially alter or change the powers, pref-
         erences or special rights of the Series A Preferred Stock so
         as to affect them adversely without the affirmative vote of
         the holders of at least two-thirds of the outstanding shares
         of Series A Preferred Stock, voting together as a single
         class.





                                         C-7<PAGE>







                   IN WITNESS WHEREOF, this Certificate of Amendment is
         executed on behalf of the Corporation by its Chairman of the
         Board and attested by its Secretary this ____ day of ________,
         1997.



                                                                        
                                            Chairman of the Board

         Attest:


                                  
         Secretary






































                                         C-8



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