ORACLE CORP /DE/
8-A12G/A, 1998-03-31
PREPACKAGED SOFTWARE
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<PAGE>
 
                      SECURITIES AND EXCHANGE COMMISSION

                            WASHINGTON, D.C. 20549


                                  FORM 8-A/A


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



                              ORACLE CORPORATION
                              ------------------
            (Exact name of registrant as specified in its charter)


        Delaware                                               94-2871189
        --------                                               ----------
        (I.R.S. Employer                             (State of incorporation or 
           organization)                                 Identification No.)
 
 
500 Oracle Parkway
Redwood City, California                                     94065
- ---------------------------------------                      -----
(Address of principal executive offices)                  (Zip Code)       

  If this form relates to the            If this form relates to the           
  registration of a class of securities  registration of a class of securities 
  pursuant to Section 12(b) of the       pursuant to Section 12(g) of the      
  Exchange Act and is effective          Exchange Act and is effective         
  pursuant to General Instruction        pursuant to General Instruction       
  A.(c), please check the following      A.(d), please check the following     
  box. [_]                               box. [X]                              
                                         
                                         
  Securities Act registration statement file number to which this 
  form relates:  000-14376
               -----------------
                (If applicable)

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

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

           None                                 None



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

                        Preferred Stock Purchase Rights
                        -------------------------------
                               (Title of Class)


<PAGE>
 
ITEM 1.      DESCRIPTION OF SECURITIES TO BE REGISTERED.

  On December 3, 1990, the Board of Directors of Oracle Corporation (the
"Company") declared a dividend of one preferred share purchase right (a "Right")
for each outstanding share of common stock, par value $0.01 per share (the
"Common Shares"), of the Company.  The dividend was paid to stockholders of
record on December 31, 1990 (the "Record Date").  On each of January 10, 1994
and March 31, 1998, the Company amended the terms of the Rights.  As of the date
hereof, if certain events related to an unsolicited takeover attempt occur, each
Right entitles the registered holder to purchase from the Company one-six
thousand seven hundred fiftieth of a share of Series A Junior Participating
Preferred Stock, par value $0.01 per share (the "Preferred Shares"), of the
Company, at a price of $125.00 per one-six thousand seven hundred fiftieth of a
Preferred Share (the "Purchase Price"), subject to adjustment.  The description
and terms of the Rights are set forth in an Amended and Restated Preferred
Shares Rights Agreement (the "Rights Agreement") between the Company and
BankBoston, N.A., as Rights Agent, dated as of March 31, 1998.

  Until the earlier to occur of (i) 10 days (or such later date as may be
determined by action of a majority of the Company's Directors then in office not
affiliated with the acquiring person or group (the "Continuing Directors"))
following a public announcement that a person, or group of affiliated or
associated persons (an "Acquiring Person"), has acquired beneficial ownership of
15% or more of the outstanding Common Shares (the date of such announcement
being the "Shares Acquisition Date") or (ii) 10 days (or such later date as may
be determined by action of a majority of the Continuing Directors then in
office) following the date that a tender offer or exchange offer is first
published or sent, the consummation of which would result in the beneficial
ownership by a person or group of 15% or more of such 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 certificates
outstanding as of March 31, 1998, by such Common Share certificates and no
separate Rights Certificates will be distributed.

  The Rights Agreement provides that, until the Distribution Date, 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 upon transfer or new issuance of Common Shares
will contain a notation incorporating the Rights Agreement by reference.  Until
the Distribution Date (or earlier redemption or expiration of the Rights), the
surrender for transfer of any certificates for Common Shares outstanding as of
March 31, 1998, even without such notation or a copy of the Summary of Rights
being attached thereto, will also constitute the transfer of the Rights
associated with the Common Shares represented by such certificate.  As soon as
practicable following the Distribution 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 Distribution Date and such
separate Right Certificates alone will evidence the Rights.

  The Rights Agreement provides that Lawrence J. Ellison and his affiliates,
associates and successors, certain successors thereto, or any other transferee
approved by the Company's Board of Directors shall not be or become an
Acquiring Person on account of the beneficial ownership of Common

                                      -1-
<PAGE>
 
Shares of the Company by any of them as of March 31, 1998, so long as Ellison
and his affiliates, associates and successors, certain successors thereto, or 
any other transferee approved by the Company's Board of Directors, do not
acquire from any third party other than the Company, in the aggregate,
beneficial ownership of more than an additional 1% of the Company's Common
Shares.

  The Rights are not exercisable until the Distribution Date.  The Rights will
expire on March 31, 2008 (the "Final Expiration Date"), unless the Final
Expiration Date is extended or unless the 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 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 Common Shares or Preferred Shares
of certain rights or warrants to subscribe for or purchase Common Shares or
Preferred Shares at a price, or securities convertible into Common Shares or
Preferred Shares with a conversion price, less than the then current market
price of the Common Shares or Preferred Shares or (iii) upon the distribution to
holders of the Common Shares or Preferred Shares of evidences of indebtedness or
assets (excluding regular periodic cash dividends paid out of earnings or
retained earnings or dividends payable in Common Shares) or of subscription
rights or warrants (other than those referred to above).

  The number of outstanding Rights and the number of Preferred Shares issuable
upon exercise of each Right are also subject to adjustment in the event of 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 Rights will not be
redeemable and are junior to any other series of preferred stock the Company may
issue (unless otherwise provided in the terms of such stock).  Each Preferred
Share will be entitled to a quarterly dividend payment of 6,750 times the
dividend declared per Common Share.  In the event of liquidation, each Preferred
Share will be entitled to a $6,750.00 preference, and thereafter the holders of
the Preferred Shares will be entitled to an aggregate payment of 6,750 times the
aggregate payment made per Common Share.  Each Preferred Share will have 6,750
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 6,750 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-six thousand seven hundred fiftieth interest
in a Preferred Share purchasable upon exercise of each Right should approximate
the value of one Common Share.

  In the event that, after the Shares Acquisition Date, the Company is acquired
in a merger or other business combination transaction or 50% or more of its
consolidated assets or

                                      -2-
<PAGE>
 
earning power are sold, proper provision will be made so that each holder of a
Right, other than Rights beneficially owned by an Acquiring Person, will
thereafter have the right to receive, upon the exercise thereof at the then
current exercise price of the Right, that number of shares of common stock of
the acquiring company which at the time of such transaction will have a market
value of two times the exercise price of the Right.  In the event that any
person 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 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 Right.  If the Company does not have authorized but
unissued Common Shares sufficient to satisfy such obligation to issue Common
Shares, the Company is obligated to deliver upon payment of the exercise price
of a Right an amount of cash or other securities equivalent in value to the
Common Shares issuable upon exercise of a Right.

  At any time after any person becomes an Acquiring Person and prior to the
acquisition by such person or group of 50% or more of the outstanding Common
Shares, by a majority vote of the Board of Directors, the Company may exchange
the Rights (other than Rights owned by such person or group which have become
void), in whole or in part, for Common Shares at an exchange ratio of one Common
Share per 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.  At the election of the Company, no fractional Preferred Shares
will be issued (other than fractions which are integral multiples of the one-six
thousand seven hundred fiftieths of a Preferred Share 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 earlier of (i) the close of business on the tenth day
following the Shares Acquisition Date, or such later date as may be determined
by a majority of Continuing Directors then in office, and (ii) the expiration
date of the Rights, the Board of Directors of the Company may redeem the Rights
in whole, but not in part, at a price of $0.000148 per Right (the "Redemption
Price").  The redemption of the Rights may be made effective at such time, on
such basis and with such conditions as the Board of Directors in its sole
discretion may establish.  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 Redemption Price.  Notwithstanding any other
provision of the Rights Agreement, if the Board of Directors authorizes
redemption of the Rights on or after the time a person becomes an Acquiring
Person, then there must be Continuing Directors then in office and such
authorization shall require the concurrence of a majority of such Continuing
Directors.

  The terms of the Rights may be amended in any respect by the Board of
Directors of the Company without the consent of the holders of the Rights,
except that, from and after the Distribution Date, no such amendments shall be
made without the approval of the holders of the Rights other than amendments
made to (i) cure ambiguities, (ii) correct or supplement provisions that may be
defective or inconsistent with other provisions of the Rights Agreement, (iii)
shorten 

                                      -3-
<PAGE>
 
or lengthen any time period under the Rights Agreement (provided that following
the tenth day following the Shares Acquisition Date such amendments may be made
only if there are Continuing Directors then in office and with the concurrence
of a majority of such Continuing Directors, or (iv) change or supplement the
provisions of the Rights Agreement in any manner the Company may deem necessary
provided that such change or supplement does not adversely affect the interests
of the holders of the Rights (other than an Acquiring Person). Notwithstanding
the foregoing, the terms of the Rights may not be supplemented or amended from
and after the Distribution Date to lengthen a time period relating to when the
Rights may be redeemed at a time when the Rights are not by their terms
redeemable or lengthen any other time period unless such lengthening is for the
purpose of protecting, enhancing or clarifying the rights of, and/or the
benefits to, the holders of 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 receive dividends.

  As of February 28, 1998, there were approximately 973,454,955 million shares
of the Company's Common Stock outstanding.  As long as the Rights are attached
to the Common Shares, one additional Right shall be deemed to be delivered for
each Common Share issued or transferred by the Company in the future, including
but not limited to Common Shares issuable upon exercise of options granted by
the Company.  Two hundred thousand Preferred Shares are reserved for issuance
upon exercise of the Rights, such number to be subject to adjustment from time
to time in accordance with the Rights Agreement.

  The Rights have certain anti-takeover effects.  The Rights will cause
substantial dilution to a person or group that attempts to acquire the Company
without conditioning the offer on a substantial number of Rights being acquired.
The Rights do not interfere with any merger or other business combination
approved by the Board of Directors since the Rights may be redeemed by the
Company as described above.

  The (i) Amended and Restated Preferred Shares Rights Agreement between the
Company and the Rights Agent, and (ii) the Certificate of Designations of Series
A Junior Participating Preferred Stock specify the terms and conditions of the
Rights, and are attached hereto as Exhibits 1 and 2 and incorporated herein by
reference.  The foregoing description of the Rights does not purport to be
complete and is qualified in its entirety by reference to the following
Exhibits.

                                      -4-
<PAGE>
 
ITEM 2.   EXHIBITS.

          1.        Amended and Restated Preferred Shares Rights Agreement dated
                    March 31, 1998 (the "Rights Agreement"), between Oracle
                    Corporation and BankBoston, N.A.

          2.        The following documents which comprise the Company's
                    Certificate of Incorporation are hereby incorporated by
                    reference or, in the case of item (vii), filed herewith:
                    (i) Restated Certificate of Incorporation filed with the
                    Secretary of State of Delaware on March 12, 1987 and
                    incorporated by reference to the Form S-1 filed with the SEC
                    on March 27, 1987 (File No. 33-12941); (ii) Amendment to
                    Certificate of Incorporation filed with the Secretary of
                    State of Delaware on December 3, 1987 and incorporated by
                    reference to the Form 10-K filed with the SEC on August 26,
                    1988 (File #0-14376), (iii) Certificate of Amendment of
                    Certificate of Incorporation filed with the Secretary of
                    State of Delaware on June 16, 1989 and incorporated by
                    reference to the Form 10-K filed with the SEC on August 25,
                    1989 (File #0-14376); (iv) Certificate of Designation of
                    Series A Junior Participating Preferred Stock filed with the
                    Secretary of State of Delaware on December 7, 1990 and
                    incorporated by reference to the Form 8-K filed with the SEC
                    on December 10, 1990 (File #0-14376); (v) Certificate of
                    Amendment of Certificate of Incorporation filed with the
                    Secretary of State of Delaware on November 4, 1993 and
                    incorporated by reference to the Form 10-Q filed with the
                    SEC on January 12, 1994 (File #0-14376); (vi) Certificate of
                    Amendment of Certificate of Incorporation filed with the
                    Secretary of State of Delaware on January 17, 1995 and
                    incorporated by reference to the Form 10-K filed with the
                    SEC on August 25, 1995 (File #0-14376); (vii) Certificate of
                    Amendment of Certificate of Incorporation filed with the
                    Secretary of State of Delaware on March 13, 1996; and (viii)
                    Certificate of Amendment of Certificate of Incorporation
                    filed with the Secretary of State of Delaware on October 30,
                    1996 and incorporated by reference to the Form 10-Q filed
                    with the SEC on January 10, 1997 (File #0-14376).

                                      -5-
<PAGE>
 
                                   SIGNATURE
                                   ---------

  Pursuant to the requirements of Section 12 of the Securities Exchange Act of
1934, as amended, the Registrant has duly caused this Amendment to Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized.

Dated:     March 31, 1998



                              ORACLE CORPORATION



                              By:  /s/ Jeffrey O. Henley
                                   ---------------------
                              Jeffrey O. Henley
                              Executive Vice President and        
                              Chief Financial Officer

                                      -6-

<PAGE>
                                                                EXHIBIT 1

 
                              ORACLE CORPORATION

                                      and

                               BANKBOSTON, N.A.

                                 Rights Agent



            AMENDED AND RESTATED PREFERRED SHARES RIGHTS AGREEMENT
            ------------------------------------------------------


                          Dated as of March 31, 1998
<PAGE>
 
                               TABLE OF CONTENTS
                               -----------------

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

EXHIBITS

Exhibit A Form of Rights Certificate
Exhibit B Summary of Rights
<PAGE>
 
                              ORACLE CORPORATION

            AMENDED AND RESTATED PREFERRED SHARES RIGHTS AGREEMENT
            ------------------------------------------------------

     This Amended and Restated Preferred Shares Rights Agreement (this
"Agreement"), dated as of March 31, 1998, is made between Oracle Corporation, a
 ---------                                                                     
Delaware corporation (the "Company"), and BankBoston, N.A. (the "Rights Agent").
                           -------                               ------------   

                                   RECITALS
                                   --------

     The Board of Directors of the Company authorized and declared a dividend of
one preferred share purchase right (a "Right") for each Common Share (as
                                       -----                        
hereinafter defined) of the Company outstanding at the Close of Business (as
hereinafter defined) on December 31, 1990 (the "Record Date"), each Right then
                                                -----------                   
representing the right to purchase one one-thousandth of a Preferred Share (as
hereinafter defined), upon the terms and subject to the conditions set forth in
a Rights Agreement dated as of December 3, 1990, between the Company and Bank of
America, N.T. & S.A., as rights agent (the "Original Agreement").
                                            ------------------   

     On August 1, 1991, the Company removed Bank of America N.T. & S.A. as
rights agent under the Original Agreement and appointed Harris Trust Company of
California as the successor rights agent under the Original Agreement.

     On January 24, 1994, the Company and Harris Trust Company of California
entered into Amendment Number One to the Original Agreement.

     On August 5, 1996, the Company removed Harris Trust Company of California
as rights agent under the Original Agreement and appointed BankBoston, N.A. as
the successor rights agent.

     Immediately prior to the execution of this Agreement, each Right
represented the right to purchase one-six thousand seven hundred fiftieths of a
Preferred Share at a price of $37.03 per one-six thousand seven hundred
fiftieths of a Preferred Share, subject to adjustment.

     The Board of Directors has determined that, pursuant to Section 27 of the
Original Agreement, the Original Agreement shall be amended and restated as set
forth herein.

                                   AGREEMENT
                                   ---------

     The parties agree as follows:

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

          (a)  "Acquiring Person" shall mean any Person who or which, together
                ----------------                                              
with all Affiliates and Associates of such Person, shall be the Beneficial Owner
of 15% or more of the 
<PAGE>
 
Common Shares then outstanding, but shall not include the Company, any
Subsidiary of the Company or 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. Notwithstanding the foregoing, no Person shall be
deemed to be an Acquiring Person either (i) as the result of the acquisition of
Common Shares by the Company which, by reducing the number of Common Shares
outstanding, increases the proportionate number of Common Shares beneficially
owned by such Person to 15% or more of the Common Shares of the Company then
outstanding; provided, however, that if a Person shall become the Beneficial
Owner of 15% or more of the Common Shares of the Company then outstanding by
reason of share purchases by the Company and shall, after such share purchases
by the Company, become the Beneficial Owner of any additional Common Shares of
the Company (other than pursuant to a dividend or distribution paid or made by
the Company on the outstanding Common Shares in Common Shares or pursuant to a
split or subdivision of the outstanding Common Shares), then such Person shall
be deemed to be an Acquiring Person; or (ii) (x) if a majority of the Continuing
Directors then in office determines in good faith that a Person who would
otherwise be an "Acquiring Person," as defined pursuant to the foregoing
provisions of this paragraph (a), has become such inadvertently (including,
without limitation, because (A) such Person was unaware that it beneficially
owned a percentage of the Common Shares that would otherwise cause such Person
to be an "Acquiring Person," as defined pursuant to the foregoing provisions of
this paragraph (a), or (B) such Person was aware of the extent of the Common
Shares it beneficially owned but had no actual knowledge of the consequences of
such beneficial ownership under this Agreement) and without any intention of
changing or influencing control of the Company, and (y) if such Person divested
or divests as promptly 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 paragraph (a), then such Person shall not be
deemed to be or to have become an "Acquiring Person" for any purposes of this
Agreement. Furthermore, notwithstanding the foregoing,

               (1)  Lawrence J. Ellison ("Ellison"), and his Affiliates and
                                          -------                          
Associates, shall not be or become an Acquiring Person on account of the
beneficial ownership of Common Shares of the Company by any of them, so long as
Ellison, and his Affiliates and Associates (other than the Company, any
Subsidiary of the Company, or 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) do not, after the date hereof, acquire from any
third party other than the Company, in the aggregate, beneficial ownership of
more than an additional 1% of the Company's Common Shares then outstanding; and

               (2)  No Successor of Ellison, his Affiliates or Associates or 
any Affiliate, Associate or Successor of such Successor shall become an 
Acquiring Person on account of Common Shares received directly or indirectly
from Ellison, so long as such Successor, Affiliate or Associate does not
thereafter acquire from any third party other than the Company, in the
aggregate, beneficial ownership of more than an additional 1% of the Company's
Common Shares then outstanding.

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

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

               (i)   which such Person or any of such Person's Affiliates or
Associates beneficially owns, directly or indirectly, for purposes of Section
13(d) of the Exchange Act and Rule 13d-3 thereunder (or any comparable or
successor law or regulation);

               (ii)  which such Person or any of such Person's Affiliates or
Associates has (A) the right to acquire (whether such right is exercisable
immediately or only after the passage of time) pursuant to any agreement,
arrangement or understanding (other than customary agreements with and between
underwriters and selling group members with respect to a bona fide public
offering of securities), or upon the exercise of conversion rights, exchange
rights, rights (other than the Rights), warrants or options, or otherwise;
provided, however, that a Person shall not be deemed pursuant to this Section
- --------  -------                                                            
l(c)(ii)(A) the Beneficial Owner of, or to beneficially own, (1) securities
tendered pursuant to a tender or exchange offer made by or on behalf of such
Person or any of such Person's Affiliates or Associates until such tendered
securities are accepted for purchase or exchange or (2) securities which a
Person or any of such Person's Affiliates or Associates may be deemed to have
the right to acquire pursuant to any merger or other acquisition agreement
between the Company and such Person (or one or more of its Affiliates or
Associates) if such agreement has been approved by the Board of Directors of the
Company prior to there being an Acquiring Person; or (B) the right to vote
pursuant to any agreement, arrangement or understanding; provided, however, that
                                                         --------  -------      
a Person shall not be deemed the Beneficial Owner of, or to beneficially own,
any security under this Section l(c)(ii)(B) if the agreement, arrangement or
understanding to vote such security (1) arises solely from a revocable proxy or
consent given to such Person in response to a public proxy or consent
solicitation made pursuant to, and in accordance with, the applicable rules and
regulations of the Exchange Act and (2) is not also then reportable on Schedule
13D under the Exchange Act (or any comparable or successor report); or

               (iii) which are beneficially owned, directly or indirectly, by
any other Person (or any Affiliate or Associate thereof) with which such Person
or any of such Person's Affiliates or Associates has any agreement, arrangement
or understanding (whether or not in writing) (other than customary agreements
with and between underwriters and selling group members with respect to a bona
fide public offering of securities) for the purpose of acquiring, holding,
voting (except to the extent contemplated by the proviso to Section l(c)(ii)(B))
or disposing of any securities of the Company; provided, however, that in no
                                               --------  -------
case shall an officer or director of the Company be deemed (x) the Beneficial
Owner of any securities beneficially owned by another officer or director of the
Company solely by reason of actions undertaken by such persons in their capacity
as officers or directors of the Company or (y) the Beneficial Owner of
securities held of record by the trustee of any employee benefit plan of the
Company or any Subsidiary of the Company for the benefit of any employee of the
Company or any Subsidiary of 

                                      -3-
<PAGE>
 
the Company, other than the officer or director, by reason of any influence that
such officer or director may have over the voting of the securities held in the
plan.

          (d)  "Business Day" shall mean any day other than a Saturday, Sunday
                ------------
or a day on which banking institutions in the State of California 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.,
                -----------------                                         
Massachusetts time, on such date; provided, however, that if such date is not a
                                  --------  -------                            
Business Day it shall mean 5:00 P.M., Massachusetts time, on the next succeeding
Business Day.

          (f)  "Common Shares" when used with reference to the Company shall
                -------------
mean the shares of Common Stock of the Company, $0.01 par value per share.
"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)  "Continuing Director" shall mean (i) any member of the Board of
                -------------------                                           
Directors of the Company who is not an Acquiring Person, or an Affiliate or
Associate of an Acquiring Person, or a representative of an Acquiring Person or
of any such Affiliate or Associate, and who was a member of the Board prior to
the date of this Agreement, or (ii) any Person who subsequently becomes a member
of the Board who is not an Acquiring Person, or an Affiliate or Associate of an
Acquiring Person, or a representative of an Acquiring Person or of any such
Affiliate or Associate, if such Person's nomination for election or election to
the Board is recommended or approved by a majority of Continuing Directors.

          (h)  "Distribution Date" shall mean the earlier of (i) the Close of
                -----------------                                            
Business on the tenth day (or such later date as may be determined by action of
a majority of Continuing Directors then in office) after the Shares Acquisition
Date (or, if the tenth day after the Shares Acquisition Date occurs before the
Record Date, the Close of Business on the Record Date) or (ii) the Close of
Business on the tenth day (or such later date as may be determined by action of
a majority of Continuing Directors then in office) after the date that a tender
or exchange offer by any Person (other than the Company, any Subsidiary of the
Company, any employee benefit plan of the Company or of any Subsidiary of the
Company, or any Person or entity organized, appointed or established by the
Company for or pursuant to the terms of any such plan)  is first published or
sent or given within the meaning of Rule 14d-2(a) of the General Rules and
Regulations under the Exchange Act, if, assuming the successful consummation
thereof, such Person would be the Beneficial Owner of 15% or more of the shares
of Common Stock then outstanding.

          (i)  "Equivalent Shares" shall mean Preferred Shares and any other
                -----------------                                           
class or series of capital stock of the Company that is entitled to participate
in dividends and other distributions, including distributions upon the
liquidation, dissolution or winding up of the Company, on a proportional basis
with the Common Shares.  In calculating the number of any class or series of
Equivalent Shares for purposes of Section 11 of this Agreement, the number of

                                      -4-
<PAGE>
 
shares, or fractions of a share, of such class or series of capital stock that
is entitled to the same dividend or distribution as a whole Common Share shall
be deemed to be one share.

          (j)  "Expiration Date" shall mean the earliest of (i) the Close of
                ---------------                                             
Business on the Final Expiration Date, (ii) the Redemption Date, (iii) the time
at which the Board of Directors orders the exchange of the Rights as provided in
Section 24 of this Agreement or (iv) the consummation of a transaction
contemplated by Section 13(d) of this Agreement.

          (k)  "Final Expiration Date" shall mean March 31, 2008.
                ---------------------                            

          (1)  "Permitted Offer" shall mean a tender offer for all outstanding
                ---------------                                               
Common Shares made in the manner prescribed by Section 14(d) of the Exchange Act
and the rules and regulations promulgated thereunder; provided, however, that
                                                      --------  -------      
such tender offer occurs at a time when Continuing Directors are in office and a
majority of the Continuing Directors then in office has determined that the
offer is both adequate and otherwise in the best interests of the Company and
its stockholders (taking into account all factors that such Continuing Directors
deem relevant, including without limitation prices that could reasonably be
achieved if the Company or its assets were sold on an orderly basis designed to
realize maximum value).

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

          (n)  "Preferred Shares" shall mean shares of Series A Junior
                ----------------                                      
Participating Preferred Stock of the Company.

          (o)  "Purchase Price" shall have the meaning set forth in Section 4(a)
                --------------                                                  
of this Agreement.

          (p)  "Record Date" shall have the meaning set forth in the recitals at
                -----------                                                     
the beginning of this Agreement.

          (q)  "Redemption Date" shall mean the time at which the Board of
                ---------------                                           
Directors of the Company orders redemption of the Rights as provided in Section
23 of this Agreement.

          (r)  "Redemption Price" shall have the meaning set forth in Section
                ----------------                                             
23(a) of this Agreement.

          (s)  "Right" shall have the meaning set forth in the recitals at the
                -----                                                         
beginning of this Agreement.

          (t)  "Section 13 Event" shall mean any event described in clause (i),
                ----------------                                               
(ii) or (iii) of Section 13(a) of this Agreement.

          (u)  "Shares Acquisition Date" shall mean the first date of public
                -----------------------                                     
announcement (which, for purposes of this definition, shall include, without
limitation, a report filed pursuant to Section 13(d) of the Exchange Act) by the
Company or an Acquiring Person that an Acquiring Person has become such;
provided that, if such person is determined not to 
- --------                                                                   

                                      -5-
<PAGE>
 
have become an Acquiring Person pursuant to Section l(a) of this Agreement, then
no Shares Acquisition Date shall be deemed to have occurred.

          (v)  "Subsidiary" of any Person shall mean any corporation or other
                ----------                                                   
entity of which an amount of voting securities sufficient to elect a majority of
the directors or Persons having similar authority of such corporation or other
entity is beneficially owned, directly or indirectly, by such Person, or any
corporation or other entity otherwise controlled by such Person.

          (w)  A "Successor" shall mean the estate or legal representative of a
                  ---------                                                    
deceased individual, the beneficiary of a deceased individual's estate, a trust
created by a deceased individual as grantor, or the beneficiary of a trust
created by a deceased individual as grantor or any other transferee of an
individual approved by the Company's Board of Directors prior to the ninetieth
(90th) day after the Board of Directors receives written notice of such
transfer.

          (x)  "Total Exercise Price" shall have the meaning set forth in
                --------------------
Section 4(a) of this Agreement.

          (y)  "Trading Day" shall have the meaning set forth in Section 11(d)
                ----------- 
of this Agreement.

          (z)  A "Triggering Event" shall be deemed to have occurred upon any
                  ----------------                                           
Person (other than the Company, any Subsidiary 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), together
with all Affiliates and Associates of such Person, becoming an Acquiring Person.

     2.   APPOINTMENT OF RIGHTS AGENT.  The Company hereby confirms the
          ---------------------------                                  
continuing appointment of the Rights Agent to act as agent for the Company in
accordance with the terms and conditions of this Agreement, and the Rights Agent
hereby accepts such appointment.  The Company may from time to time appoint such
co-Rights Agents as it may deem necessary or desirable, upon ten (10) days'
prior written notice to the Rights Agent.  The Rights Agent shall have no duty
to supervise, and in no event be liable for, the acts or omissions of any such
co-Rights Agent.

     3.   ISSUANCE OF RIGHTS CERTIFICATES.
          ------------------------------- 

          (a)  Until the Distribution Date, (i) the Rights will be evidenced
(subject to the provisions of Sections 3(b) and 3(c) of this Agreement) by the
certificates for Common Shares registered in the names of the holders thereof
(which certificates shall also be deemed to be Rights Certificates) and not by
separate Rights Certificates and (ii) the right to receive Rights Certificates
will be transferable only in connection with the transfer of Common Shares.
Until the earlier of the Distribution Date or the Expiration Date, the surrender
for transfer of such certificates for Common Shares shall also constitute the
surrender for transfer of the Rights associated with the Common Shares
represented thereby.  As soon as practicable after the Distribution Date, the
Company will prepare and execute, the Rights Agent will countersign, and 

                                      -6-
<PAGE>
 
the Company will send or cause to be sent (and the Rights Agent will, if
requested, send) by first-class, 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 records of the Company, a Rights Certificate
in substantially the form of Exhibit A to this Agreement (a "Rights
                             ---------                       ------
Certificate"), evidencing one Right for each Common Share so held, subject to
- -----------
adjustment as provided herein. In the event that an adjustment in the number of
Rights per Common Share has been made pursuant to Section 11(a)(i), Section
11(i) or Section 11(p) of this Agreement, then at the time of distribution of
the Rights Certificates, the Company shall make the necessary and appropriate
rounding adjustments (in accordance with Section 14(a) of this Agreement) so
that Rights Certificates representing only whole numbers of Rights are
distributed and cash is paid in lieu of any fractional Rights. As of the
Distribution Date, the Rights will be evidenced solely by such Rights
Certificates and may be transferred by the transfer of the Rights Certificates
as permitted hereby, separately and apart from any transfer of one or more
Common Shares, and the holders of such Rights Certificates as listed in the
records of the Company or any transfer agent or registrar for the Rights shall
be the record holders thereof.

          (b)  Upon the request of any holder of any Common Shares or, after the
Distribution Date, the holder of any Rights, the Company shall, at its expense,
provide a copy of the Summary of Rights in the form attached hereto as Exhibit
                                                                       -------
B.
- -

          (c)  Unless the Board of Directors, by resolution adopted at or before
the time of the issuance (including pursuant to the exercise of rights under the
Company's benefit plans) of any Common Shares, specifies to the contrary, Rights
shall be issued in respect of all Common Shares that are issued after the date
of this Agreement but prior to the earlier of the Distribution Date or the
Expiration Date or, in certain circumstances provided in Section 22 of this
Agreement, after the Distribution Date.  Certificates representing such Common
Shares shall also be deemed to be certificates for Rights, and shall bear the
following legend:

     This certificate also evidences and entitles the holder hereof to certain
     rights as set forth in an Amended and Restated Preferred Shares Rights
     Agreement between Oracle Corporation and BankBoston, N.A., as the Rights
     Agent, dated as of March 31, 1998 (the "Rights Agreement"), the terms of
                                             ----------------
     which are hereby incorporated herein by reference and a copy of which is on
     file at the principal executive offices of Oracle Corporation. Under
     certain circumstances, as set forth in the Rights Agreement, such Rights
     will be evidenced by separate certificates and will no longer be evidenced
     by this certificate. Oracle Corporation will mail to the holder of this
     certificate a copy of the Rights Agreement without charge after receipt of
     a written request therefor. Under certain circumstances set forth in the
     Rights Agreement, Rights issued to, or held by, any Person who is, was or
     becomes an Acquiring Person or any Affiliate or Associate thereof (as such
     terms are defined in the Rights Agreement), whether currently held by or on
     behalf of such Person or by any subsequent holder, may become null and
     void.

With respect to such certificates containing the foregoing legend, until the
earlier of (i) the Distribution Date or (ii) the Expiration Date, the Rights
associated with the Common Shares 

                                      -7-
<PAGE>
 
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 canceled and retired so that the Company shall not
be entitled to exercise any Rights associated with the Common Shares which are
no longer outstanding.

     4.   FORM OF RIGHTS CERTIFICATES.
          --------------------------- 

          (a)  The Rights Certificates (and the forms of election to purchase
Common Shares and of assignment to be printed on the reverse thereof) shall be
substantially in the form of Exhibit A to this Agreement and may have such marks
                             ---------                                          
of identification or designation and such legends, summaries or endorsements
printed thereon as the Company may deem appropriate and as are not inconsistent
with the provisions of this Agreement, or as may be required to comply with any
applicable law or with any rule or regulation made pursuant thereto or with any
rule or regulation of any stock exchange on which the Rights may from time to
time be listed, or to conform to usage.  Subject to the provisions of Section 11
and Section 22 of this Agreement, the Rights Certificates, whenever distributed,
shall be dated as of the Record Date (or in the case of Rights issued with
respect to Common Shares issued by the Company after the Record Date, as of the
date of issuance of such Common Shares), shall show the date of countersignature
by the Rights Agent, and on their face shall entitle the holders thereof to
purchase such number of one-six thousand seven hundred fiftieths of a Preferred
Share as shall be set forth therein at the price set forth therein (such
exercise price per one-six thousand seven hundred fiftieths of a Preferred Share
being hereinafter referred to as the "Purchase Price" and the aggregate exercise
                                      --------------                            
price of all Preferred Shares issuable upon exercise of one Right being
hereinafter referred to as the "Total Exercise Price"), but the number and type
                                --------------------                           
of securities purchasable upon the exercise of each Right and the Purchase Price
shall be subject to adjustment as provided herein.

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

                                      -8-
<PAGE>
 
     The Rights represented by this Rights Certificate are or were beneficially
     owned by a Person who was or became an Acquiring Person or an Affiliate or
     Associate of an Acquiring Person (as such terms are defined in the Rights
     Agreement). Accordingly, this Rights Certificate and the Rights represented
     hereby may become null and void in the circumstances specified in Section
     7(e) of the Rights Agreement.

In the event that the Rights become exercisable, the Rights Agent and the
Company will agree upon a procedure for determining which Rights will bear such
legend.

     5.   COUNTERSIGNATURE AND REGISTRATION.
          --------------------------------- 

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

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

     6.   TRANSFER, SPLIT UP, COMBINATION AND EXCHANGE OF RIGHTS CERTIFICATES;
          --------------------------------------------------------------------
MUTILATED, DESTROYED, LOST OR STOLEN RIGHTS CERTIFICATES.
- -------------------------------------------------------- 

          (a)  Subject to the provisions of Sections 7(e), 14 and 24 of this
Agreement, at any time after the Close of Business on the Distribution Date, and
at or prior to the Close of Business on the Expiration Date, any Rights
Certificate or Rights Certificates may be transferred, split up, combined or
exchanged for another Rights Certificate or Rights Certificates, entitling the
registered holder to purchase a like number of one-six thousand seven hundred
fiftieths of a Preferred Share (or, following a Triggering Event, other
securities, cash or other assets, as the case may be) as the Rights Certificate
or Rights Certificates surrendered then entitled such holder to purchase. Any
registered holder desiring to transfer, split up, combine or exchange any Rights

                                      -9-
<PAGE>
 
Certificate or Rights Certificates shall make such request in writing delivered
to the Rights Agent, and shall surrender the Rights Certificate or Rights
Certificates to be transferred, split up, combined or exchanged at the office of
the Rights Agent designated for such purpose.  Neither the Rights Agent nor the
Company shall be obligated to take any action whatsoever with respect to the
transfer of any such surrendered Rights Certificate until the registered holder
shall have completed and signed the certificate contained in the form of
assignment on the reverse side of such Rights Certificate and shall have
provided such additional evidence of the identity of the Beneficial Owner (or
former Beneficial Owner) or Affiliates or Associates thereof as the Company
shall reasonably request.  Thereupon the Rights Agent shall, subject to Sections
7(e), 14 and 24 of this Agreement, countersign and deliver to the person
entitled thereto a Rights Certificate or Rights Certificates, as the case may
be, as so requested.  The Company may require payment of a sum sufficient to
cover any tax or governmental charge that may be imposed in connection with any
transfer, split up, combination or exchange of Rights Certificates.

          (b)  Upon receipt by the Company and the Rights Agent of evidence
reasonably satisfactory to them of the loss, theft, destruction or mutilation of
a Rights Certificate, and, in case of loss, theft or destruction, of indemnity
or security reasonably satisfactory to them, and, at the Company's request,
reimbursement to the Company and the Rights Agent of all reasonable expenses
incidental thereto, and upon surrender to the Rights Agent and cancellation of
the Rights Certificate if mutilated, the Company will make and deliver a new
Rights Certificate of like tenor to the Rights Agent for delivery to the
registered holder in lieu of the Rights Certificate so lost, stolen, destroyed
or mutilated.

     7.   EXERCISE OF RIGHTS; PURCHASE PRICE; EXPIRATION DATE OF RIGHTS.
          ------------------------------------------------------------- 

          (a)  Subject to Section 7(e) of this Agreement, the registered holder
of any Rights 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 Rights Certificate, with the form of
election to purchase on the reverse side thereof duly executed, to the Rights
Agent at the office of the Rights Agent designated for such purpose, together
with payment of the Purchase Price for each one-six thousand seven hundred
fiftieth of a Preferred Share as to which the Rights are exercised, at or prior
to the Expiration Date.

          (b)  The Purchase Price for each one-six thousand seven hundred
fiftieth of a Preferred Share issuable pursuant to the exercise of a Right shall
initially be $125, shall be subject to adjustment from time to time as provided
in Sections 11 and 13 of this Agreement and shall be payable in lawful money of
the United States of America in accordance with paragraph (c) below.

          (c)  Upon receipt of a Rights Certificate representing exercisable
Rights, with the form of election to purchase duly executed, accompanied by
payment of the Purchase Price for the number of one-six thousand seven hundred
fiftieths of a Preferred Share (or other securities or property, as the case may
be) to be purchased and an amount equal to any applicable transfer tax required
to be paid by the holder of such Rights Certificate in accordance with Section 9
of this Agreement in cash, or by certified check or cashier's check payable to
the order 

                                     -10-
<PAGE>
 
of the Company, the Rights Agent shall, subject to Section 20(k) of this
Agreement, thereupon promptly (i) (A) requisition from any transfer agent of the
Preferred Shares (or make available, if the Rights Agent is the transfer agent
for the Preferred Shares) a certificate or certificates for the number of one-
six thousand seven hundred fiftieths of a Preferred Share to be purchased and
the Company hereby irrevocably authorizes its transfer agent to comply with all
such requests or (B) if the Company shall have elected to deposit the total
number of one-six thousand seven hundred fiftieths of a Preferred Share issuable
upon exercise of the Rights hereunder with a depository agent, requisition from
the depository agent of depository receipts representing such number of one-six
thousand seven hundred fiftieths of a Preferred Share as are to be purchased (in
which case certificates for the Preferred Shares represented by such receipts
shall be deposited by the transfer agent with the depository agent) and the
Company hereby directs the depository 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 of this
Agreement, (iii) after receipt of such certificates or depository receipts,
cause the same to be delivered to or upon the order of the registered holder of
such Rights Certificate, registered in such name or names as may be designated
by such holder and (iv) when appropriate, after receipt thereof, deliver such
cash to or upon the order of the registered holder of such Rights Certificate.
The payment of the Purchase Price (as such amount may be reduced (including to
zero) pursuant to Section 11(a)(iv) of this Agreement) may be made in cash or by
certified check or cashier's check payable to the order of the Company. In the
event that the Company is obligated to issue other securities of the Company,
pay cash and/or distribute other property pursuant to Section 11(a) of this
Agreement, the Company will make all arrangements necessary so that such other
securities, cash and/or other property are available for distribution by the
Rights Agent, if and when appropriate.

          (d)  In case the registered holder of any Rights Certificate shall
exercise less than all the Rights evidenced thereby, a new Rights Certificate
evidencing Rights equivalent to the Rights remaining unexercised shall be issued
by the Rights Agent to the registered holder of such Rights Certificate or to
his or her duly authorized assigns, subject to the provisions of Section 14 of
this Agreement.

          (e)  Notwithstanding anything in this Agreement to the contrary, from
and after the first occurrence of a Triggering Event or a Section 13 Event, any
Rights beneficially owned by (i) an Acquiring Person or an Associate or
Affiliate of an Acquiring Person, (ii) a transferee of an Acquiring Person (or
of any such Associate or Affiliate) who becomes a transferee after the Acquiring
Person becomes such (a "Post Transferee"), (iii) a transferee of an Acquiring
                        ---------------                                      
Person (or of any such Associate or Affiliate) who becomes a transferee prior to
or concurrently with the Acquiring Person becoming such and receives such Rights
pursuant to either (A) a transfer (whether or not for consideration) from the
Acquiring Person to holders of equity interests in such Acquiring Person or to
any Person with whom the Acquiring Person has any continuing agreement,
arrangement or understanding regarding the transferred Rights or (B) a transfer
that the Board of Directors of the Company has determined is part of a plan,
arrangement or understanding which has as a primary purpose or effect the
avoidance of this Section 7(e) (a "Prior Transferee") or (iv) any subsequent
                                   ----------------                         
transferee receiving transferred Rights from a Post Transferee or a Prior
Transferee, either directly or through one or more intermediate 

                                     -11-
<PAGE>
 
transferees, shall become null and void without any further action and no holder
of such Rights shall have any rights whatsoever with respect to such Rights,
whether under any provision of this Agreement or otherwise. The Company shall
use all reasonable efforts to insure that the provisions of this Section 7(e)
and Section 4(b) of this Agreement are complied with, but shall have no
liability to any holder of Rights Certificates or to any other Person as a
result of its failure to make any determinations with respect to an Acquiring
Person or any of such Acquiring Person's Affiliates, Associates or transferees
hereunder.

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

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

     9.   RESERVATION AND AVAILABILITY OF PREFERRED SHARES.
          ------------------------------------------------ 

          (a)  The Company covenants and agrees that it will use its best
efforts to cause to be reserved and kept available out of and to the extent of
its authorized and unissued shares of Preferred Stock not reserved for another
purpose (and, following the occurrence of a Triggering Event, out of its
authorized and unissued shares of Common Shares and/or other securities), the
number of Preferred Shares (and, following the occurrence of the Triggering
Event, Common Shares and/or other securities) that will be sufficient to permit
the exercise in full of all outstanding Rights.

          (b)  If the Company shall hereafter list any of its Preferred Shares
on a national securities exchange, then so long as the Preferred Shares (and,
following the occurrence of a Triggering Event, Common Shares and/or other
securities) issuable and deliverable upon exercise of the Rights may be listed
on a national securities exchange, the Company shall use its best efforts to
cause, from and after such time as the Rights become exercisable (but only to
the

                                     -12-
<PAGE>
 
extent that it is reasonably likely that the Rights will be exercised), all
shares reserved for such issuance to be listed on such exchange upon official
notice of issuance upon such exercise.

          (c)  The Company shall use its best efforts to (i) file, as soon as
practicable following the earliest date after the first occurrence of a
Triggering Event in which the consideration to be delivered by the Company upon
exercise of the Rights has been determined in accordance with Section 11(a)(iv)
of this Agreement, or as soon as is required by law following the Distribution
Date, as the case may be, a registration statement under the Securities Act of
1933, as amended (the "Securities Act"), with respect to the securities
                       --------------                                  
purchasable upon exercise of the Rights on an appropriate form, (ii)  cause such
registration statement to become effective as soon as practicable after such
filing and (iii) cause such registration statement to remain effective (with a
prospectus at all times meeting the requirements of the Securities Act) until
the earlier of (A) the date as of which the Rights are no longer exercisable for
such securities and (B) the date of expiration of the Rights.  The Company may
temporarily suspend, for a period not to exceed ninety (90) days after the date
set forth in clause (i) of the first sentence of this Section 9(c), the
exercisability of the Rights in order to prepare and file such registration
statement and permit it to become effective.  Upon any such suspension, the
Company shall issue a public announcement stating, and notify the Rights Agent,
that the exercisability of the Rights has been temporarily suspended, as well as
a public announcement and notification to the Rights Agent at such time as the
suspension is no longer in effect.  The Company will also take such action as
may be appropriate under, or to ensure compliance with, the securities or "blue
sky" laws of the various states in connection with the exercisability of the
Rights.  Notwithstanding any provision of this Agreement to the contrary, the
Rights shall not be exercisable in any jurisdiction, unless the requisite
qualification in such jurisdiction shall have been obtained, or an exemption
therefrom shall be available, and until a registration statement has been
declared effective.

          (d)  The Company covenants and agrees that it will take all such
action as may be necessary to ensure 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.

          (e)  The Company further covenants and agrees that it will pay when
due and payable any and all federal and state transfer taxes and charges which
may be payable in respect of the original issuance or delivery of the Rights
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 Rights Certificates to a person other
than, or the issuance or delivery of certificates or depository receipts for the
Preferred Shares in a name other than that of, the registered holder of the
Rights Certificate evidencing Rights surrendered for exercise or to issue or to
deliver any certificates or depository 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 Rights Certificate at the time of surrender)
or until it has been established to the Company's satisfaction that no such tax
is due.

                                     -13-
<PAGE>
 
     10.  PREFERRED SHARES RECORD DATE.  Each person in whose name any
          ----------------------------                                
certificate for a number of one-six thousand seven hundred fiftieths of a
Preferred Share is issued upon the exercise of Rights shall for all purposes be
deemed to have become the holder of record of Preferred Shares represented
thereby on, and such certificate shall be dated, the date upon which the Rights
Certificate evidencing such Rights was duly surrendered and payment of the
Purchase Price multiplied by the number of one-six thousand seven hundred
fiftieths of a Preferred Share with respect to which the Rights have been
exercised (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 become the record holder of such shares on, and such certificate shall be
dated, the next 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 Rights 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 distributions or to exercise any preemptive rights, and shall not be
entitled to receive any notice of any proceedings of the Company, except as
provided herein.

     11.  ADJUSTMENT OF PURCHASE PRICE, NUMBER OF SHARES OR NUMBER OF RIGHTS.
          ------------------------------------------------------------------  
The Purchase Price, the number and kind of shares or other property covered by
each Right and the number of Rights outstanding are subject to adjustment from
time to time as provided in this Section 11.

          (a)  (i)  Anything in this Agreement to the contrary notwithstanding,
in the event that at any time after the date of this Rights Agreement and prior
to the Distribution Date, the Company shall (i) declare and pay any dividend on
the Common Shares payable in Common Shares or (ii) effect a subdivision,
combination, stock split or consolidation of the Common Shares (by
reclassification or otherwise than by payment of a dividend payable in Common
Shares) into a greater or lesser number of Common Shares, then, in each such
case, the number of Rights associated with each Common Share then outstanding,
or issued or delivered thereafter, shall be proportionately adjusted so that the
number of Rights thereafter associated with each Common Share following any such
event shall equal the result obtained by multiplying the number of Rights
associated with each Common Share immediately prior to such event by a fraction
the numerator of which shall be the total number of Common Shares outstanding
immediately prior to the occurrence of the event and the denominator of which
shall be the total number of Common Shares outstanding immediately following the
occurrence of such event.

               (ii) Subject to Section 24 of this Agreement, in the event a
Triggering Event shall have occurred, then promptly following such Triggering
Event, proper provision shall be made so that each holder of a Right, except as
provided in Section 7(e) of this Agreement, shall thereafter have the right to
receive for each Right, upon exercise thereof in accordance with the terms of
this Agreement and payment of the then-current Total Exercise Price, in lieu of
a number of one-six thousand seven hundred fiftieths of a Preferred Share, such
number of Common Shares of the Company as shall equal the result obtained by
multiplying the then-current Purchase Price by the then number of one-six
thousand seven hundred fiftieths of a Preferred Share for which a Right was
exercisable (or would have been exercisable if the

                                     -14-
<PAGE>
 
Distribution Date had occurred) immediately prior to the first occurrence of a
Triggering Event, and dividing that product by 50% of the current per share
market price (determined pursuant to Section 11(d) of this Agreement) for Common
Shares on the date of occurrence of the Triggering Event (such number of shares
being hereinafter referred to as the "Adjustment Shares").
                                      -----------------   

               (iii) The right to buy Common Shares of the Company pursuant to
Section 11(a)(ii) of this Agreement shall not arise as a result of any Person
becoming an Acquiring Person through an acquisition of Common Shares pursuant to
a Permitted Offer.

               (iv)  In lieu of issuing Common Shares in accordance with Section
11(a)(ii) of this Agreement, the Company may, if the Board of Directors
determines that such action is necessary or appropriate and not contrary to the
interest of holders of Rights (and, in the event that the number of Common
Shares which are authorized by the Company's Certificate of Incorporation but
not outstanding or reserved for issuance for purposes other than upon exercise
of the Rights are not sufficient to permit the exercise in full of the Rights,
or if any necessary regulatory approval for such issuance has not been obtained
by the Company, the Company shall): (A) determine the excess of (1) the value of
the Common Shares issuable upon the exercise of a Right (the "Current Value")
                                                              -------------  
over (2) the Purchase Price (such excess, the "Spread") and (B) with respect to
                                               ------                          
each Right, make adequate provision to substitute for such Common Shares, upon
exercise of the Rights, (1) cash, (2) a reduction in the Purchase Price, (3)
other equity securities of the Company (including, without limitation, shares or
units of shares of any series of Preferred Stock which the Board of Directors of
the Company has deemed to have the same value as Common Shares (such shares or
units of shares of Preferred Stock are herein called "common stock
                                                      ------------
equivalents")), except to the extent that the Company has not obtained any
- -----------
necessary stockholder or regulatory approval for such issuance, (4) debt
securities of the Company, except to the extent that the Company has not
obtained any necessary stockholder or regulatory approval for such issuance, (5)
other assets or (6) any combination of the foregoing, having an aggregate value
equal to the Current Value, where such aggregate value has been determined by
the Board of Directors of the Company based upon the advice of a nationally
recognized investment banking firm selected by the Board of Directors of the
Company; provided, however, if the Company shall not have made adequate
         --------  -------                                             
provision to deliver value pursuant to clause (B) above within thirty (30) days
following the later of (x) the first occurrence of a Triggering Event and (y)
the date on which the Company's right of redemption pursuant to Section 23(a)
expires (the later of (x) and (y) being referred to herein as the "Section
                                                                   -------
11(a)(ii) Trigger Date"), then the Company shall be obligated to deliver, upon
- ----------------------                                                        
the surrender for exercise of a Right and without requiring payment of the
Purchase Price, Common Shares (to the extent available), except to the extent
that the Company has not obtained any necessary stockholder or regulatory
approval for such issuance, and then, if necessary, cash, which shares and/or
cash have an aggregate value equal to the Spread. If the Board of Directors of
the Company shall determine in good faith that it is likely that sufficient
additional Common Shares could be authorized for issuance upon exercise in full
of the Rights or that any necessary regulatory approval for such issuance will
be obtained, the thirty (30) day period set forth above may be extended to the
extent necessary, but not more than ninety (90) days after the Section 11(a)(ii)
Trigger Date, in order that the Company may seek stockholder approval for the
authorization of

                                     -15-
<PAGE>
 
such additional shares or take action to obtain such regulatory approval (such
period, as it may be extended, the "Substitution Period"). To the extent that
                                    -------------------       
the Company determines that some action need be taken pursuant to the first
and/or second sentences of this Section 11(a)(iv), the Company (x) shall
provide, subject to Section 7(e) of this Agreement, that such action shall apply
uniformly to all outstanding Rights and (y) may suspend the exercisability of
the Rights until the expiration of the Substitution Period in order to seek any
authorization of additional shares, to take any action to obtain any required
regulatory approval and/or to decide the appropriate form of distribution to be
made pursuant to such first sentence and to determine the value thereof. In the
event of any such suspension, the Company shall issue a public announcement
stating that the exercisability of the Rights has been temporarily suspended, as
well as a public announcement at such time as the suspension is no longer in
effect. For purposes of this Section 11(a)(iv), the value of the Common Shares
shall be the current per share market price (as determined pursuant to Section
11(d) of this Agreement) of the Common Shares on the Section 11(a)(ii) Trigger
Date and the value of any "common stock equivalent" shall be deemed to have the
                           ------------ ----------
same value as the Common Shares on such date.

          (b)  In case the Company shall, at any time after the date of this
Agreement, fix a record date for the issuance of rights, options or warrants to
all holders of Common Shares or of any class or series of Equivalent Shares
entitling such holders (for a period expiring within forty-five (45) calendar
days after such record date) to subscribe for or purchase Common Shares or
Equivalent Shares or securities convertible into Common Shares or Equivalent
Shares at a price per share (or having a conversion price per share, if a
security convertible into Common Shares or Equivalent Shares) less than the then
current per share market price of the Common Shares or Equivalent Shares (as
defined in Section 11(d)) on such record date, then, in each such case, 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 Common Shares and
Equivalent Shares (if any) outstanding on such record date, plus the number of
Common Shares or Equivalent Shares, as the case may be, which the aggregate
offering price of the total number of Common Shares or Equivalent Shares, as the
case may be, so to be offered (and/or the aggregate initial conversion price of
the convertible securities so to be offered) would purchase at such current
market price, and the denominator of which shall be the number of Common Shares
and Equivalent Shares (if any) outstanding on such record date, plus the number
of additional Common Shares or Equivalent Shares, as the case may be, to be
offered for subscription or purchase (or into which the convertible securities
so to be offered are initially convertible).  In case such subscription price
may be paid in a consideration part or all of which shall be in a form other
than cash, the value of such consideration shall be as determined in good faith
by the Board of Directors of the Company, whose determination shall be described
in a statement filed with the Rights Agent and shall be binding on the Rights
Agent and the holders of the Rights.  Common Shares and Equivalent 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 successively
whenever such a record date is fixed, and in the event that such rights, options
or warrants are not so issued, the Purchase Price shall be adjusted to be the
Purchase Price which would then be in effect if such record date had not been
fixed.

                                     -16-
<PAGE>
 
          (c)  In case the Company shall, at any time after the date of this
Agreement, fix a record date for the making of a distribution to all holders of
the Common Shares or of any class or series of Equivalent Shares (including any
such distribution made in connection with a consolidation or merger in which the
Company is the continuing or surviving corporation) of evidences of indebtedness
or assets (other than a regular quarterly cash dividend, if any, or a dividend
payable in Common Shares)  or subscription rights, options or warrants
(excluding those referred to in Section 11(b)), then, in each such case, the
Purchase Price to be in effect after such record date shall be determined by
multiplying the Purchase Price in effect immediately prior to such record date
by a fraction, the numerator of which shall be the current per share market
price (as determined pursuant to Section 11(d) of this Agreement) of a Common
Share or an Equivalent Share on such record date, less the fair market value (as
determined in good faith by the Board of Directors of the Company, whose
determination shall be described in a statement filed with the Rights Agent) of
the portion of the cash, assets or evidences of indebtedness so to be
distributed or of such subscription rights or warrants applicable to a Common
Share or Equivalent Share, as the case may be, and the denominator of which
shall be such current market price (as determined pursuant to Section 11(d) of
this Agreement) of a Common Share or Equivalent Share on such record date.  Such
adjustments shall be made successively whenever such a record date is fixed, and
in the event that such distribution is not so made, the Purchase Price shall be
adjusted to be the Purchase Price which would have been in effect if such record
date had not been fixed.

          (d)  For the purpose of any computation hereunder, other than
computations made pursuant to Section 11(a)(iv) of this Agreement, the "current
                                                                        -------
per share market price" of any security (a "Security" for the purpose of this
- ----------------------                      --------                         
Section 11(d)) on any date shall be deemed to be the average of the daily
closing prices per share of such Security for the thirty (30) consecutive
Trading Days (as such term is hereinafter defined) immediately prior to such
date, and for purposes of computations made pursuant to Section 11(a)(iv) of
this Agreement, the "current per share market price" of any Security on any date
                     ------------------------------                             
shall be deemed to be the average of the daily closing prices per share of such
Security for the ten (10) consecutive Trading Days immediately prior to such
date; provided, however, that in the event that the current per share market
      --------  -------                                                     
price of the Security is determined during a period following the announcement
by the issuer of such Security of (i) a dividend or distribution on such
Security payable in shares of such Security or securities convertible into such
shares or (ii) any subdivision, combination or reclassification of such
Security, and prior to the expiration of the requisite thirty (30) Trading Day
or ten (10) Trading Day period, 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 system with respect
to securities listed or admitted to trading 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 reporting system
with respect to securities listed on the principal national securities exchange
on which the Security is listed or admitted to trading or, if the Security is
not listed or admitted to trading on any national securities exchange, 

                                     -17-
<PAGE>
 
the last sale price or, if such last sale price is not reported, the average of
the high bid and low asked prices in the over-the-counter market, as reported by
the Nasdaq National Market ("Nasdaq") or such other system then in use, or, if
                             ------
on any such date the Security is not quoted by any such organization, the
average of the closing bid and asked prices as furnished by a professional
market maker making a market in the Security selected by the Board of
Directors of the Company. If on any such date no market maker is making a
market in the Common Shares, the fair value of such shares on such date as
determined in good faith by the Board of Directors of the Company shall be
used. The term "Trading Day" shall mean a day on which the principal national
                -----------
securities exchange on which the Security is listed or admitted to trading is
open for the transaction of business or, if the Security is not listed or
admitted to trading on any national securities exchange, a Business Day. If
the Common Shares are not publicly held or so listed or traded, "current per
                                                                 -----------
share market price" shall mean the fair value per share as determined in good
- ------------------
faith by the Board of Directors of the Company, whose determination shall be
described in a statement filed with the Rights Agent and shall be conclusive
for all purposes.

          (e)  Anything herein to the contrary notwithstanding, no adjustment in
the Purchase Price shall be required unless such adjustment would require an
increase or decrease of at least 1% in the Purchase Price; provided, however,
                                                           --------  ------- 
that any adjustments which by reason of this Section 11(e) are not required to
be made shall be carried forward and taken into account in any subsequent
adjustment.  All calculations under this Section 11 shall be made to the nearest
cent or to the nearest ten-thousandth of a Common Share or other share or one
hundred-thousandth of a Preferred Share, as the case may be.  Notwithstanding
the first sentence of this Section 11(e), any adjustment required by this
Section 11 shall be made no later than the earlier of (i) three (3) years from
the date of the transaction which requires such adjustment or (ii) the
Expiration Date.

          (f)  If as a result of an adjustment made pursuant to Section 11(a) or
13(a) of this Agreement, the holder of any Right thereafter exercised shall
become entitled to receive any shares of capital stock other than Preferred
Shares, thereafter the number of such other shares so receivable upon exercise
of any Right and if required, the Purchase Price thereof, shall be subject to
adjustment from time to time in a manner and on terms as nearly equivalent as
practicable to the provisions with respect to the Common Shares contained in
Sections 11(a), (b), (c), (e), (h), (i), (j), (k), (1) and (m), and the
provisions of Sections 7, 9, 10, 13 and 14 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 hereunder shall evidence the right to
purchase, at the adjusted Purchase Price, the number of one-six thousand seven
hundred fiftieths of a Preferred 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 Section 11(b), each Right outstanding immediately prior to
the making of such adjustment shall 

                                     -18-
<PAGE>
 
thereafter evidence the right to purchase, at the adjusted Purchase Price, that
number of Preferred Shares (calculated to the nearest one hundred-thousandth of
a share) obtained by (i) multiplying (x) the number of Preferred Shares covered
by a Right immediately prior to this adjustment, by (y) the Purchase Price in
effect immediately prior to such adjustment of the Purchase Price, and (ii)
dividing the product so obtained by the Purchase Price in effect immediately
after such adjustment of the Purchase Price.

          (i)  The Company may elect on or after the date of any adjustment of
the Purchase Price as a result of the calculations made in Section 11(b) to
adjust the number of Rights, in substitution for any adjustment in the number of
Preferred Shares 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-six thousand seven hundred fiftieths of a Preferred Share
for which a Right was exercisable immediately prior to such adjustment.  Each
Right held of record prior to such adjustment of the number of Rights shall
become that number of Rights (calculated to the nearest ten-thousandth) obtained
by dividing the Purchase Price in effect immediately prior to adjustment of the
Purchase Price by the Purchase Price in effect immediately after adjustment of
the Purchase Price.  The Company shall make a public announcement of its
election to adjust the number of Rights, indicating the record date for the
adjustment, and, if known at the time, the amount of the adjustment to be made.
This record date may be the date on which the Purchase Price is adjusted or any
day thereafter, but, if the Rights Certificates have been issued, shall be at
least ten (10) days later than the date of the public announcement.  If Rights
Certificates have been issued, upon each adjustment of the number of Rights
pursuant to this Section 11(i), the Company shall, as promptly as practicable,
cause to be distributed to holders of record of Rights Certificates on such
record date Rights Certificates evidencing, subject to Section 14 of this
Agreement, the additional Rights to which such holders shall be entitled as a
result of such adjustment, or, at the option of the Company, shall cause to be
distributed to such holders of record in substitution and replacement for the
Rights Certificates held by such holders prior to the date of adjustment, and
upon surrender thereof, if required by the Company, new Rights Certificates
evidencing all the Rights to which such holders shall be entitled after such
adjustment.  Rights Certificates so to be distributed shall be issued, executed
and countersigned in the manner provided for herein (and may bear, at the option
of the Company, the adjusted Purchase Price) and shall be registered in the
names of the holders of record of Rights Certificates on the record date
specified in the public announcement.

          (j)  Irrespective of any adjustment or change in the Purchase Price or
the number of Preferred Shares issuable upon the exercise of the Rights, the
Rights Certificates theretofore and thereafter issued may continue to express
the Purchase Price per one-six thousand seven hundred fiftieths of a Preferred
Share and the number of one-six thousand seven hundred fiftieths of a Preferred
Share which were expressed in the initial Rights Certificates issued hereunder.

          (k)  Before taking any action that would cause an adjustment reducing
the Purchase Price below the par or stated value, if any, of the number of one-
six thousand seven hundred fiftieths of a Preferred Share 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 

                                     -19-
<PAGE>
 
Company may validly and legally issue as fully paid and nonassessable shares
such number of one-six thousand seven hundred fiftieths of a Preferred Share at
such adjusted Purchase Price.

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

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

          (n)  The Company covenants and agrees that it shall not, at any time
after the Distribution Date, effect or permit to occur any Triggering Event or
Section 13 Event, if (i) at the time or immediately after such Triggering Event
or Section 13 Event there are any rights, warrants or other instruments or
securities outstanding or agreements in effect which would substantially
diminish or otherwise eliminate the benefits intended to be afforded by the
Rights or (ii) prior to, simultaneously with or immediately after such Section
13 Event, the stockholders of the Person who constitutes, or would constitute,
the "Principal Party" for purposes of Section 13(b) of this Agreement shall have
     ---------------                                                            
received a distribution of Rights previously owned by such Person or any of its
Affiliates and Associates.

          (o)  The Company covenants and agrees that, after the Distribution
Date, it will not, except as permitted by Sections 23, 24 or 27 of this
Agreement, take (or permit to be taken) any action if at the time such action is
taken it is reasonably foreseeable that such action will diminish substantially
or otherwise eliminate the benefits intended to be afforded by the Rights.

          (p)  Anything in this Agreement to the contrary notwithstanding, in
the event 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)
subdivide the outstanding Preferred Shares,

                                     -20-
<PAGE>
 
(C) combine the outstanding Preferred Shares (by reverse stock split or
otherwise) into a smaller number of Preferred Shares, or (D) issue any shares of
its capital stock in a reclassification of the Preferred Shares (including any
such reclassification in connection with a consolidation or merger in which the
Company is the continuing or surviving corporation), then, in each such event,
except as otherwise provided in this Section 11 and Section 7(e) of this
Agreement: (1) each of the Rights outstanding at the time of the record date for
such dividend or the effective date of such subdivision, combination or
reclassification shall be proportionately adjusted to that number of Rights
(calculated to the nearest one ten-thousandth (1/10,000) of a Right) equal to a
fraction (the "Exchange Fraction"), the numerator of which shall be the total
               -----------------
number of Preferred Shares or shares of capital stock issued in such
reclassification of the Preferred Shares outstanding immediately following such
time and the denominator of which shall be the total number of Preferred Shares
outstanding immediately prior to such time, and the number of Rights that shall
thereafter be issued with respect to each Common Share or share of other capital
stock that shall be issued in a reclassification of the Common Shares prior to
the Distribution Date shall be equal to the total number of outstanding Rights
immediately after such event (as adjusted pursuant to this clause (1)) divided
by the total number of outstanding Common Shares or shares of such other capital
stock immediately after such event (subject to further adjustment pursuant to
the provisions of this Agreement); (2) the Purchase Price in effect at the time
of the record date for such dividend or of the effective date of such
subdivision, combination or reclassification shall be adjusted so that the
Purchase Price thereafter shall equal the result obtained by dividing the
Purchase Price in effect immediately prior to such time by the Exchange
Fraction; provided, however, that in no event shall the consideration to be paid
          --------  -------                  
upon the exercise of one Right be less than the aggregate par value of the
shares of capital stock of the Company issuable upon exercise of such Right; and
(3) the number of one-six thousand seven hundred fiftieths of a Preferred Share
or share of such other capital stock issuable upon the exercise of each Right
shall remain unchanged immediately after such event, but, in the event of a
reclassification, the kind of shares issuable upon the exercise of each Right
immediately after such reclassification shall be adjusted to be the kind of
shares of such other capital stock issued in such reclassification, rather than
Preferred Shares.

     12.  CERTIFICATE OF ADJUSTED PURCHASE PRICE OR NUMBER OF SHARES.  Whenever
          ----------------------------------------------------------           
an adjustment is made as provided in Sections 11 and 13 of this Agreement, the
Company shall promptly (a) prepare a certificate setting forth such adjustment
and a brief statement of the facts accounting for such adjustment, (b) file with
the Rights Agent and with each transfer agent for the Preferred Shares a copy of
such certificate and (c) if such adjustment occurs after the Distribution Date,
mail a brief summary thereof to each holder of a Rights Certificate in
accordance with Section 26 of this Agreement.  Notwithstanding the foregoing
sentence, the failure of the Company to make such certification or give such
notice shall not affect the validity of such adjustment or the force or effect
of the requirement for such adjustment.  The Rights Agent shall be fully
protected in relying on any such certificate and on any adjustment contained
therein and shall not be deemed to have knowledge of such adjustment unless and
until it shall have received such certificate.

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

                                     -21-
<PAGE>
 
          (a)  In the event that,  following the Shares Acquisition Date,
directly or indirectly:

               (i)   the Company shall consolidate with, or merge with and into,
any other Person (other than a Subsidiary of the Company in a transaction the
principal purpose of which is to change the state of incorporation of the
Company or that complies with Section 11(o) of this Agreement);

               (ii)  any Person (other than a Subsidiary of the Company in a
transaction that complies with Section 11(o) of this Agreement) shall
consolidate with the Company, or merge with and into the Company and the Company
shall be the continuing or surviving corporation of such consolidation or
merger; or

               (iii) the Company shall sell or otherwise transfer (or one or
more of its Subsidiaries shall sell or otherwise transfer), in one or more
transactions, assets or earning power aggregating 50% or more of the assets or
earning power of the Company and its Subsidiaries (taken as a whole) to any
other Person or Persons (other than the Company or one or more of its wholly
owned Subsidiaries in one or more transactions, each of which complies with
Section 11(o) of this Agreement), then, and in each such case, proper provision
shall be made so that:

                     (A)  each holder of a Right (except as otherwise provided
herein) shall thereafter have the right to receive, upon the exercise thereof in
accordance with the terms of this Agreement, such number of validly authorized
and issued, fully paid and nonassessable Common Shares of the Principal Party
(as hereinafter defined), free of any liens, encumbrances, rights of first
refusal or other adverse claims, as shall be equal to the result obtained by (1)
multiplying the then current Purchase Price by the number of one-six thousand
seven hundred fiftieths of a Preferred Share for which a Right was exercisable
immediately prior to the first occurrence of a Section 13 Event (or, if a
Triggering Event has occurred prior to the first occurrence of a Section 13
Event, multiplying the number of such one-six thousand seven hundred fiftieths
of a Preferred Share for which a Right was exercisable immediately prior to the
first occurrence of a Triggering Event by the Purchase Price in effect
immediately prior to such first occurrence) and (2) dividing that product
(which, following the first occurrence of a Section 13 Event, shall be referred
to as the "Total Exercise Price" for each Right and for all purposes of this
           --------------------                                             
Agreement) by 50% of the current per share market price (determined pursuant to
Section 11(d) of this Agreement) of the Common Shares of such Principal Party on
the date of consummation of such Section 13 Event;

                     (B)  such Principal Party shall thereafter be liable for,
and shall assume, by virtue of such Section 13 Event, all the obligations and
duties of the Company pursuant to this Agreement;

                     (C)  the term "Company" shall thereafter be deemed to refer
                                    -------
to such Principal Party, it being specifically intended that the provisions of
Section 11 of this Agreement shall apply only to such Principal Party following
the first occurrence of a Section 13 Event;

                                     -22-
<PAGE>
 
                    (D)  such Principal Party shall take such steps (including,
but not limited to, the reservation of a sufficient number of its Common Shares)
in connection with the consummation of any such transaction as may be necessary
to assure that the provisions of this Agreement shall thereafter be applicable,
as nearly as reasonably may be, in relation to its Common Shares thereafter
deliverable upon the exercise of the Rights.

          (b) "Principal Party" shall mean, in the case of any transaction
               ---------------                                            
described in clause (i), (ii) or (iii) of Section 13(a), the Person referred to
therein or such Person's successor, including, if applicable, the Company, if it
is the surviving corporation), provided, however, that in any such case, (i) if
                               --------  -------                               
such Person is a direct or indirect Subsidiary of another Person, "Principal
                                                                   ---------
Party" shall refer to such other Person and (ii) in case such Person is a
- -----                                                                    
Subsidiary, directly or indirectly, of more than one Person, "Principal Party"
                                                              --------------- 
shall refer to whichever of such Persons is the issuer of the Common Shares
having the greatest aggregate value, and provided, further, that for purposes of
                                         --------  -------                      
transactions described in clause (iii) of this Section 13(b), "Principal Party"
                                                               --------------- 
shall refer to that Person receiving the greatest portion of the assets or
earning power transferred pursuant to such transaction or transactions.

          (c)  If, for any reason, the Rights cannot be exercised for Common
Shares of such Principal Party as provided in Section 13(a), then each holder of
Rights shall have the right to exchange its Rights for cash from such Principal
Party in an amount equal to the number of Common Shares that it would otherwise
be entitled to purchase times 50% of the current per share market price, as
determined pursuant to Section 11(d) of this Agreement, of such Common Shares of
such Principal Party.  If, for any reason, the foregoing formulation cannot be
applied to determine the cash amount into which the Rights are exchangeable,
then the Board of Directors, based upon the advice of one or more nationally
recognized investment banking firms, and based upon the total value of the
Company, shall determine such amount reasonably and with good faith to the
holders of Rights.  Any such determination shall be final and binding on the
Rights Agent.

          (d)  Notwithstanding anything in this Agreement to the contrary,
Section 13 shall not be applicable to a transaction described in clauses (i) and
(ii) of Section 13(a) if:  (i) such transaction is consummated with a Person or
Persons who acquired Common Shares pursuant to a Permitted Offer (or a wholly-
owned Subsidiary of any such Person or Persons); (ii) the price per share of
Common Shares offered in such transaction is not less than the price per share
of Common Shares paid to all holders of Common Shares whose shares were
purchased pursuant to such Permitted Offer; and (iii) the form of consideration
being offered to the remaining holders of Common Shares pursuant to such
transaction is the same form as the form of consideration paid pursuant to such
Permitted Offer.  Upon consummation of any such transaction contemplated by this
Section 13(d), all Rights hereunder shall expire.

          (e)  The Company shall not consummate any Section 13 Event unless the
Principal Party shall have a sufficient number of authorized Common Shares that
have not been issued or reserved for issuance to permit the exercise in full of
the Rights in accordance with this Section 13 and unless prior thereto the
Company and such issuer shall have executed and delivered to the Rights Agent a
supplemental agreement confirming that such Principal Party 

                                     -23-
<PAGE>
 
shall, upon consummation of such Section 13 Event, assume this Agreement in
accordance with Sections 13(a) and (b) of this Agreement, that all rights of
first refusal or preemptive rights in respect of the issuance of Common Shares
of such Principal Party upon exercise of outstanding Rights have been waived,
that there are no rights, warrants, instruments or securities outstanding or any
agreements or arrangements which, as a result of the consummation of such
transaction, would eliminate or substantially diminish the benefits intended to
be afforded by the Rights and that such transaction shall not result in a
default by such Principal Party under this Agreement, and further providing
that, as soon as practicable after the date of such Section 13 Event, such
Principal Party will:

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

               (ii)  use its best efforts to list (or continue the listing of)
the Rights and the securities purchasable upon exercise of the Rights on a
national securities exchange or to meet the eligibility requirements for
quotation on NASDAQ; and

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

               In the event that at any time after the occurrence of a
Triggering Event some or all of the Rights shall not have been exercised at the
time of a transaction described in this Section 13, the Rights which have not
theretofore been exercised shall thereafter be exercisable in the manner
described in Section 13(a) (without taking into account any prior adjustment
required by Section 11(a)(ii)).

          (f)  The provisions of this Section 13 shall similarly apply to
successive mergers or consolidations or sales or other transfers.

     14.  FRACTIONAL RIGHTS AND FRACTIONAL SHARES.
          --------------------------------------- 

          (a)  The Company shall not be required to issue fractions of Rights or
to distribute Rights Certificates that evidence fractional Rights.  In lieu of
such fractional Rights, at the election of the Company, there shall be paid to
the registered holders of the Rights Certificates with regard to which such
fractional Rights would otherwise be issuable, an amount in cash equal to the
same fraction of the current market value of 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, as determined
pursuant to the second sentence of Section 11(d) of this Agreement.

                                     -24-
<PAGE>
 
          (b)  The Company shall not be required to issue fractions of Preferred
Shares (other than fractions that are integral multiples of one-six thousand
seven hundred fiftieths of a Preferred Share) upon exercise of the Rights or to
distribute certificates which evidence fractional Preferred Shares (other than
fractions that are integral multiples of one-six thousand seven hundred
fiftieths of a Preferred Share). In lieu of fractional Preferred Shares that are
not integral multiples of one-six thousand seven hundred fiftieths of a
Preferred Share, the Company shall pay to the registered holders of Rights
Certificates at the time such Rights are exercised as herein provided an amount
in cash equal to the same fraction of the current market value of a Common
Share. For purposes of this Section 14(b), the current market value of a Common
Share shall be the closing price of a Common Share (as determined pursuant to
the second sentence of Section 11(d) of this Agreement) 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 or her right to receive any fractional Rights or any fractional
shares upon exercise of a Right.

     15.  RIGHTS OF ACTION.  All rights of action in respect of this Agreement,
          ----------------                                                     
excepting the rights of action given to the Rights Agent under Section 18 of
this Agreement, are vested in the respective registered holders of the Rights
Certificates (and, prior to the Distribution Date, the registered holders of the
Common Shares); and any registered holder of any Rights 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 Rights Certificate (or, prior to the
Distribution Date, of the Common Shares), may, in his or her own behalf and for
his or her 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 or her right to exercise the Rights evidenced by such Rights Certificate in
the manner provided in such Rights Certificate and in this Agreement.  Without
limiting the foregoing or any remedies available to the holders of Rights, it is
specifically acknowledged that the holders of Rights would not have an adequate
remedy at law for any breach of this Agreement and will be entitled to specific
performance of the obligations under, and injunctive relief against actual or
threatened violations of, the obligations of any Person subject to this
Agreement.

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

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

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

          (c)  subject to Sections 6(a) and 7(f) of this Agreement, the Company
and the Rights Agent may deem and treat the person in whose name the Rights
Certificate (or, prior to 

                                     -25-
<PAGE>
 
the Distribution Date, the associated Common Shares certificate) is registered
as the absolute owner thereof and of the Rights evidenced thereby
(notwithstanding any notations of ownership or writing on the Rights
Certificates or the associated Common Shares certificate made by anyone other
than the Company or the Rights Agent) for all purposes whatsoever, and neither
the Company nor the Rights Agent shall be affected by any notice to the
contrary.

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

     18.  CONCERNING THE RIGHTS AGENT.
          --------------------------- 

          (a)  The Company agrees to pay to the Rights Agent such compensation
as shall be agreed upon in writing between the Company and the Rights Agent for
all services rendered by it hereunder and, from time to time, on demand of the
Rights Agent, its reasonable expenses and counsel fees and other disbursements
incurred in the administration and execution of this Agreement and the exercise
and performance of its duties hereunder. The Company also agrees to indemnify
the Rights Agent for, and to hold it harmless against, any loss, liability or
expense, incurred without negligence, bad faith or willful misconduct on the
part of the Rights Agent, for anything done or omitted by the Rights Agent in
connection with the acceptance and administration of this Agreement, including
the costs and expenses of defending against any claim of liability in the
premises.

          (b)  The Rights Agent shall be protected and shall incur no liability
for, or in respect of any action taken, suffered or omitted by it in connection
with, its administration of this Agreement in reliance upon any Rights
Certificate or certificate for the 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 acknowledged, by the proper Person or Persons, or
otherwise upon the advice of counsel as set forth in Section 20 of this
Agreement.

     19.  MERGER OR CONSOLIDATION OR CHANGE OF NAME OF RIGHTS AGENT.
          --------------------------------------------------------- 

          (a)  Any corporation into which the Rights Agent or any successor
Rights Agent may be merged or with which it may be consolidated, or any
corporation resulting from any merger or consolidation to which the Rights Agent
or any successor Rights Agent shall be a party, or any corporation succeeding to
the stockholder services business of the Rights Agent or 

                                     -26-
<PAGE>
 
any successor Rights Agent, shall be the successor to the Rights Agent under
this Agreement without the execution or filing of any paper or any further act
on the part of any of the parties to this Agreement; provided, however, that
                                                     --------  -------
such corporation would be eligible for appointment as a successor Rights Agent
under the provisions of Section 21 of this Agreement. In case at the time such
successor Rights Agent shall succeed to the agency created by this Agreement,
any of the Rights Certificates shall have been countersigned but not delivered,
any such successor Rights Agent may adopt the countersignature of the
predecessor Rights Agent and deliver such Rights Certificates so countersigned;
and in case at that time any of the Rights Certificates shall not have been
countersigned, any successor Rights Agent may countersign such Rights
Certificates either in the name of the predecessor Rights Agent or in the name
of the successor Rights Agent; and in all such cases such Rights Certificates
shall have the full force provided in the Rights Certificates and in this
Agreement.

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

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

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

          (b)  Whenever in the performance of its duties under this Agreement
the Rights Agent shall deem it necessary or desirable that any fact or matter
(including, without limitation, the identity of any Acquiring Person and the
determination of "current per share market price") be proved or established by
                  ------------------------------
the Company prior to taking or suffering any action hereunder, such fact or
matter (unless other evidence in respect thereof be herein specifically
prescribed) may be deemed to be conclusively proved and established by a
certificate signed by any one of the Chairman of the Board, the Chief Executive
Officer, the President, any Vice President, the Chief Financial Officer, the
Secretary or any Assistant Secretary of the Company and delivered to the Rights
Agent; and such certificate shall be full authorization to the Rights Agent for
any action taken or suffered in good faith by it under the provisions of this
Agreement in reliance upon such certificate.

          (c)  The Rights Agent shall be liable hereunder to the Company and any
other Person only for its own negligence, bad faith or willful misconduct.

                                     -27-
<PAGE>
 
          (d)  The Rights Agent shall not be liable for or by reason of any of
the statements of fact or recitals contained in this Agreement or in the Rights
Certificates (except 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 responsibility in respect
of the validity of this Agreement or the execution and delivery of this
Agreement (except the due execution of this Agreement by the Rights Agent) or in
respect of the validity or execution of any Rights Certificate (except its
countersignature thereof); nor shall it be responsible for any breach by the
Company of any covenant or condition contained in this Agreement or in any
Rights Certificate; nor shall it be responsible for any change in the
exercisability of the Rights or any adjustment in the terms of the Rights
(including the manner, method or amount thereof) provided for in Sections 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 Rights Certificates after receipt by the Rights Agent of a
certificate furnished pursuant to Section 12 describing such change or
adjustment); nor shall it by any act hereunder be deemed to make any
representation or warranty as to the authorization or reservation of any
Preferred Shares to be issued pursuant to this Agreement or any Rights
Certificate or as to whether any Preferred Shares will, when issued, be validly
authorized and issued, fully paid and nonassessable.

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

          (g)  The Rights Agent is hereby authorized and directed to accept
instructions with respect to the performance of its duties hereunder from any
one of the Chairman of the Board, the Chief Executive Officer, the President,
any Vice President, the Chief Financial Officer, the Secretary or any Assistant
Secretary of the Company, and to apply to such officers for advice or
instructions in connection with its duties, and it shall not be liable for any
action taken or suffered by it in good faith in accordance with instructions of
any such officer or for any delay in acting while waiting for those
instructions.  Any application by the Rights Agent for written instructions from
the Company may, at the option of the Rights Agent, set forth in writing any
action proposed to be taken or omitted by the Rights Agent under this Rights
Agreement and the date on and/or after which such action shall be taken or such
omission shall be effective.  The Rights Agent shall not be liable for any
action taken by, or omission of, the Rights Agent in accordance with a proposal
included in any such application on or after the date specified in such
application (which date shall not be less than five (5) Business Days after the
date any officer of the Company actually receives such application, unless any
such officer shall have consented in writing to an earlier date) unless, prior
to taking any such action (or the effective date in the case of an omission),
the Rights Agent shall have received written instructions in response to such
application specifying the action to be taken or omitted.

          (h)  The Rights Agent and any stockholder, director, officer or
employee of the Rights Agent may buy, sell or deal in any of the Rights or other
securities of the Company or 

                                     -28-
<PAGE>
 
become pecuniarily interested in any transaction in which the Company may be
interested, or contract with or lend money to the Company or otherwise act as
fully and freely as though it were not Rights Agent under this Agreement.
Nothing herein shall preclude the Rights Agent from acting in any other capacity
for the Company or for any other legal entity.

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

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

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

     21.  CHANGE OF RIGHTS AGENT.  The Rights Agent or any successor Rights
          ----------------------                                           
Agent may resign and be discharged from its duties under this Agreement upon
thirty (30) days' notice in writing mailed to the Company and to each transfer
agent of the Preferred Shares and the Common Shares by registered or certified
mail.  The Company may remove the Rights Agent or any successor Rights Agent
upon thirty (30) days' notice in writing, mailed to the Rights Agent or
successor Rights Agent, as the case may be, and to each transfer agent of the
Preferred Shares and the Common Shares by registered or certified mail.   If the
Rights Agent shall resign or be removed or shall otherwise become incapable of
acting, the Company shall appoint a successor to the Rights Agent.  If the
Company shall fail to make such appointment within a period of thirty (30) days
after giving notice of such removal or after it has been notified in writing of
such resignation or incapacity by the resigning or incapacitated Rights Agent or
by the holder of a Rights Certificate (who shall, with such notice, submit his
or her Rights Certificate for inspection by the Company), then the registered
holder of any Rights Certificate may apply to any court of competent
jurisdiction for the appointment of a new Rights Agent.  Any successor Rights
Agent, whether appointed by the Company or by such a court, shall either (a) be
a corporation organized and doing business under the laws of the United States
or of any state of the United States, in good standing, which is authorized
under such laws to exercise corporate trust or stockholder services powers and
is subject to supervision or examination by federal or state authority and which
has at the time of its appointment as Rights Agent a combined capital and
surplus of at least $50 million or (b) an affiliate of such a corporation.
After appointment, the successor Rights Agent shall be vested with the same
powers, rights, duties and responsibilities as if it had 

                                     -29-
<PAGE>
 
been originally named as Rights Agent without further act or deed; but the
predecessor Rights Agent shall deliver and transfer to the successor Rights
Agent any property at the time held by it hereunder, and execute and deliver any
further assurance, conveyance, act or deed necessary for the purpose. Not later
than the effective date of any such appointment, the Company shall file notice
thereof in writing with the predecessor Rights Agent and each transfer agent of
the Preferred Shares and the Common Shares. 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.

     22.  ISSUANCE OF NEW RIGHTS CERTIFICATES.  Notwithstanding any of the
          -----------------------------------                             
provisions of this Agreement or of the Rights to the contrary, the Company may,
at its option, issue new Rights Certificates evidencing Rights in such form as
may be approved by its Board of Directors to reflect any adjustment or change in
the Purchase Price and the number or kind or class of shares or other securities
or property purchasable under the Rights Certificates made in accordance with
the provisions of this Agreement.  In addition,  in connection with the issuance
or sale of Common Shares following the Distribution Date and prior to the
redemption or expiration of the Rights, the Company (a) shall, with respect to
Common Shares so issued or sold pursuant to the exercise of stock options or
under any employee plan or arrangement or upon the exercise, conversion or
exchange of securities hereinafter issued by the Company and (b) may, in any
other case, if deemed necessary or appropriate by the Board of Directors of the
Company, issue Rights Certificates representing the appropriate number of Rights
in connection with such issuance or sale; provided, however, that (i) no such
                                          --------  -------                  
Rights Certificate shall be issued and this sentence shall be null and void ab
                                                                            --
initio if, and to the extent that, such issuance or this sentence would create a
- ------                                                                          
significant risk of or result in material adverse tax consequences to the
Company or the Person to whom such Rights Certificate would be issued or would
create a significant risk of or result in such options' or employee plans' or
arrangements' failing to qualify for otherwise available special tax treatment
and (ii) no such Rights Certificate shall be issued if, and to the extent that,
appropriate adjustment shall otherwise have been made in lieu of the issuance
thereof.

     23.  REDEMPTION.
          ---------- 

          (a)  The Company may, at its option and with the approval of the Board
of Directors, at any time prior to the Close of Business on the earlier of (i)
the tenth day following the Shares Acquisition Date or such later date as may be
determined by action of a majority of Continuing Directors then in office and
publicly announced by the Company or (ii) the Final Expiration Date, redeem all
but not less than all the then outstanding Rights at a redemption price of
$0.000148 per Right, appropriately adjusted to reflect any stock split, stock
dividend or similar transaction occurring after the date of this Agreement (such
redemption price being herein referred to as the "Redemption Price") and the
                                                  ----------------          
Company may, at its option, pay the Redemption Price either in Common Shares
(based on the current per share market price thereof (as determined pursuant to
Section 11(d) of this Agreement) at the time of redemption) or cash; provided,
                                                                     -------- 
however, if the Board of Directors of the Company authorizes redemption of the
- -------                                                                       
Rights on or after the time a Person becomes an Acquiring Person, then there
must be Continuing 

                                     -30-
<PAGE>
 
Directors then in office and such authorization shall require the concurrence of
a majority of such Continuing Directors.

          (b)  Immediately upon the action of the Board of Directors of the
Company ordering the redemption of the Rights, evidence of which shall have been
filed with the Rights Agent, and without any further action and without any
notice, the right to exercise the Rights will terminate and the only right
thereafter of the holders of Rights shall be to receive the Redemption Price.
Within ten (10) days after the action of the Board of Directors ordering the
redemption of the Rights, the Company shall give notice of such redemption to
the Rights Agent and the holders of the then outstanding Rights by mailing such
notice to all such holders at their last addresses as they appear upon the
registry books of the Rights Agent or, prior to the Distribution Date, on the
registry books of the transfer agent for the Common 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 redeem, acquire or purchase
for value any Rights at any time in any manner other than that specifically set
forth in this Section 23 or in Section 24 of this Agreement, and other than in
connection with the purchase of Common Shares prior to the Distribution Date.

     24.  EXCHANGE.
          -------- 

          (a)  Subject to applicable laws, rules and regulations, and subject to
subsection (c) below, the Company may, at its option, by majority vote of the
Board of Directors, at any time after the occurrence of a Triggering Event,
exchange all or part of the then outstanding and exercisable Rights (which shall
not include Rights that have become void pursuant to the provisions of Section
7(e) of this Agreement) for Common Shares at an exchange ratio of one Common
Share per Right, appropriately adjusted to reflect any stock split, stock
dividend or similar transaction occurring after the date of this Agreement (such
exchange ratio being hereinafter referred to as the "Ratio of Exchange").
                                                     -----------------    
Notwithstanding the foregoing, the Board of Directors shall not be empowered to
effect such exchange at any time after any Person (other than the Company, any
Subsidiary of the Company, any employee benefit plan of the Company or any such
Subsidiary, or any entity holding Common Shares for or pursuant to the terms of
any such plan), together with all Affiliates and Associates of such Person,
becomes the Beneficial Owner of 50% or more of the Common Shares then
outstanding.

          (b)  Immediately upon the action of the Board of Directors ordering
the exchange of any Rights pursuant to subsection (a) of this Section 24 and
without any further action and without any notice, the right to exercise such
Rights shall terminate and the only right thereafter of a holder of such Rights
shall be to receive that number of Common Shares equal to the number of such
Rights held by such holder multiplied by the Ratio of Exchange. The Company
shall 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 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. 

                                     -31-
<PAGE>
 
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 be effected pro rata based on the number of Rights (other than Rights
which have become void pursuant to the provisions of Section 7(e) of this
Agreement) held by each holder of Rights.

          (c)  In the event that there shall not be sufficient Common Shares
issued but not outstanding or authorized but unissued to permit any exchange of
Rights as contemplated in accordance with Section 24(a), the Company shall
either take such action as may be necessary to authorize additional Common
Shares for issuance upon exchange of the Rights or alternatively, at the option
of a majority of the Board of Directors, with respect to each Right (i) pay cash
in an amount equal to the Current Value (as hereinafter defined), in lieu of
issuing Common Shares in exchange therefor, or (ii) issue debt or equity
securities or a combination thereof, having a value equal to the Current Value,
in lieu of issuing Common Shares in exchange for each such Right, where the
value of such securities shall be determined by a nationally recognized
investment banking firm selected by the Board of Directors by majority vote of
the Board of Directors, or (iii) deliver any combination of cash, property,
Common Shares and/or other securities having a value equal to the Current Value
in exchange for each Right.  For purposes of this Section 24(c) only, the
Current Value shall mean the product of the current per share market price of
Common Shares (determined pursuant to Section 11(d) on the date of the
occurrence of the event described above in subparagraph (a)) multiplied by the
number of Common Shares for which the Right otherwise would be exchangeable if
there were sufficient shares available.  To the extent that the Company
determines that some action need be taken pursuant to clauses (i),  (ii) or
(iii) of this Section 24(c), the Board of Directors may temporarily suspend the
exercisability of the Rights for a period of up to sixty (60) days following the
date on which the event described in Section 24(a) shall have occurred, in order
to seek any authorization of additional Common Shares and/or to decide the
appropriate form of distribution to be made pursuant to the above provision and
to determine the value thereof.  In the event of any such suspension, the
Company shall issue a public announcement stating that the exercisability of the
Rights has been temporarily suspended.

          (d)  The Company shall not be required to issue fractions of Common
Shares or to distribute certificates that evidence fractional Common Shares.  In
lieu of such fractional Common Shares, there shall be paid to the registered
holders of the Rights Certificates with regard to which such fractional Common
Shares would otherwise be issuable, an amount in cash equal to the same fraction
of the current per share market value of a whole Common Share (as determined
pursuant to Section 11(d) of this Agreement).

                                     -32-
<PAGE>
 
          (e)  The Company may, at its option, by majority vote of the Board of
Directors, at any time before any Person has become an Acquiring Person,
exchange all or part of the then outstanding Rights for rights of substantially
equivalent value, as determined reasonably and with good faith by the Board of
Directors, based upon the advice of one or more nationally recognized investment
banking firms.

          (f)  Immediately upon the action of the Board of Directors ordering
the exchange of any Rights pursuant to subsection (e) 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 rights in exchange therefor as has been
determined by the Board of Directors in accordance with subsection (e) above.
The Company shall 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 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 transfer agent for the Common Shares of the Company.
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 Rights will be effected.

     25.  NOTICE OF CERTAIN EVENTS.
          ------------------------ 

          (a)  In case the Company shall propose to effect or permit to occur
any Section 13 Event, the Company shall give notice thereof to each holder of
Rights in accordance with Section 26 of this Agreement at least twenty (20) days
prior to occurrence of such Section 13 Event.

          (b)  In case any Triggering Event or Section 13 Event shall occur,
then, in any such case, the Company shall as soon as practicable thereafter give
to each holder of a Rights Certificate, in accordance with Section 26 of this
Agreement, a notice of the occurrence of such event, which shall specify the
event and the consequences of the event to holders of Rights under Sections
11(a)(ii) and 13 of this Agreement.

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

               Oracle Corporation
               500 Oracle Parkway
               Redwood City, CA  94065
               Attention:  General Counsel

Subject to the provisions of Section 21 of this Agreement, any notice or demand
authorized by this Agreement to be given or made by the Company or by the holder
of any Rights Certificate to or on the Rights Agent shall be sufficiently given
or made if sent by first-class mail, postage prepaid, addressed (until another
address is filed in writing with the Company) as follows:

                                     -33-
<PAGE>
 
               BankBoston, N.A.
               c/o Boston EquiServe Limited Partnership
               150 Royall Street
               Canton, MA 02021
               Attention: Client Administration

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

     27.  SUPPLEMENTS AND AMENDMENTS.  Prior to the Distribution Date, the
          --------------------------                                      
Company may supplement or amend this Agreement in any respect without the
approval of any holders of Rights and the Rights Agent shall, if the Company so
directs, execute such supplement or amendment.  From and after the Distribution
Date, the Company and the Rights Agent may from time to time supplement or amend
this Agreement without the approval of any holders of Rights in order to (i)
cure any ambiguity, (ii) correct or supplement any provision contained herein
which may be defective or inconsistent with any other provisions herein, (iii)
shorten or lengthen any time period hereunder (which lengthening or shortening
shall be effective only if there are Continuing Directors then in office and
shall require the concurrence of a majority of such Continuing Directors) or
(iv) to change or supplement the provisions hereunder in any manner that the
Company may deem necessary or desirable and that shall not adversely affect the
interests of the holders of Rights (other than an Acquiring Person or an
Affiliate or Associate of an Acquiring Person); provided, this Agreement may not
                                                --------                        
be supplemented or amended to lengthen, pursuant to clause (iii) of this
sentence, (A) a time period relating to when the Rights may be redeemed at such
time as the Rights are not then redeemable or (B) any other time period unless
such lengthening is for the purpose of protecting, enhancing or clarifying the
rights of, and/or the benefits to, the holders of Rights.  Upon the delivery of
a certificate from an appropriate officer of the Company that states that the
proposed supplement or amendment is in compliance with the terms of this Section
27, the Rights Agent shall execute such supplement or amendment.  Prior to the
Distribution Date, the interests of the holders of Rights shall be deemed
coincident with the interests of the holders of Common Shares.

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

     29.  DETERMINATIONS AND ACTIONS BY THE BOARD OF DIRECTORS, ETC.  For all
          ---------------------------------------------------------          
purposes of this Agreement, any calculation of the number of Common Shares
outstanding at any particular time, including for purposes of determining the
particular percentage of such outstanding Common Shares of which any Person is
the Beneficial Owner, shall be made in accordance with the last sentence of Rule
13d-3(d)(1)(i) of the General Rules and Regulations under the Exchange Act.  The
Board of Directors of the Company (and, where specifically provided for herein,
the Continuing Directors) shall have the exclusive power and authority to

                                     -34-
<PAGE>
 
administer this Agreement and to exercise all rights and powers specifically
granted to the Board, or the Company (or, where specifically provided for
herein, the Continuing Directors), or as may be necessary or advisable in the
administration of this Agreement, including, without limitation, the right and
power to (i) interpret the provisions of this Agreement and (ii) make all
determinations deemed necessary or advisable for the administration of this
Agreement (including a determination to redeem or not redeem the Rights or to
amend the Agreement). All such actions, calculations, interpretations and
determinations (including, for purposes of clause (y) below, all omissions with
respect to the foregoing) which are done or made by the Board (or, where
specifically provided for herein, by the Continuing Directors) in good faith,
shall (x) be final, conclusive and binding on the Company, the Rights Agent, the
holders of the Rights Certificates and all other parties and (y) not subject the
Board or the Continuing Directors to any liability to the holders of the Rights.

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

     31.  SEVERABILITY.  If any term, provision, covenant or restriction of this
          ------------                                                          
Agreement is held by a court of competent jurisdiction or other authority to be
invalid, void or unenforceable, the remainder of the terms, provisions,
covenants and restrictions of this Agreement shall remain in full force and
effect and shall in no way be affected, impaired or invalidated; provided,
                                                                 -------- 
however, that notwithstanding anything in this Agreement to the contrary, if any
- -------                                                                         
such term, provision, covenant or restriction is held by such court or authority
to be invalid, void or unenforceable and the Board of Directors of the Company
determines in its good faith judgment that severing the invalid language from
this Agreement would adversely affect the purpose or effect of this Agreement,
the right of redemption set forth in Section 23 of this Agreement shall be
reinstated and shall not expire until the Close of Business on the tenth day
following the date of such determination by the Board of Directors.

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

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

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

                                     -35-
<PAGE>
 
     The parties have caused this Agreement to be duly executed as of the date
first written above.

                                   ORACLE CORPORATION

                                       /s/ Jeffrey O. Henley
                                   By:________________________________

                                   Name:      Jeffrey O. Henley
                                          ____________________________

                                   Title: Executive Vice President and 
                                          ____________________________
                                          Chief Financial Officer
                                          ____________________________


                                   BANKBOSTON, N.A.

                                        /s/ Micheal J. Lapolla
                                   By:_______________________________
                                          
                                          Micheal J. Lapolla
                                   Name:_____________________________

                                          Director, Client Services
                                   Title:____________________________

                                     -36-
<PAGE>
 
                                   EXHIBIT A
                                   ---------

                          FORM OF RIGHTS CERTIFICATE
                          --------------------------

Certificate No. R-                                               ______ Rights

     NOT EXERCISABLE AFTER MARCH 31, 2008, OR EARLIER IF TERMINATED BY
     THE COMPANY. THE RIGHTS ARE SUBJECT TO REDEMPTION, AT THE OPTION
     OF THE COMPANY, AT $0.000148 PER RIGHT ON THE TERMS SET FORTH IN
     THE RIGHTS AGREEMENT. UNDER CERTAIN CIRCUMSTANCES, RIGHTS
     BENEFICIALLY OWNED BY AN ACQUIRING PERSON OR AN AFFILIATE OR
     ASSOCIATE OF AN ACQUIRING PERSON (AS SUCH TERMS ARE DEFINED IN
     THE RIGHTS AGREEMENT) AND ANY SUBSEQUENT HOLDER OF SUCH RIGHTS
     MAY BECOME NULL AND VOID. [THE RIGHTS REPRESENTED BY THIS RIGHTS
     CERTIFICATE ARE OR WERE BENEFICIALLY OWNED BY A PERSON WHO WAS OR
     BECAME AN ACQUIRING PERSON OR AN AFFILIATE OR ASSOCIATE OF AN
     ACQUIRING PERSON (AS SUCH TERMS ARE DEFINED IN THE RIGHTS
     AGREEMENT). ACCORDINGLY, THIS RIGHTS CERTIFICATE AND THE RIGHTS
     REPRESENTED HEREBY MAY BECOME NULL AND VOID IN THE CIRCUMSTANCES
     SPECIFIED IN SECTION 7(e) OF SUCH RIGHTS AGREEMENT.]/*/

                              RIGHTS CERTIFICATE
                              ------------------

     This certifies that ________________________, or registered assigns, is the
registered owner of the number of Rights set forth above, each of which entitles
the owner thereof, subject to the terms, provisions and conditions of the
Amended and Restated Preferred Shares Rights Agreement, dated as of March 31,
1998 (the "Rights Agreement"), between Oracle Corporation, a Delaware
           ----------------
corporation (the "Company"), and BankBoston, N.A. (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., Massachusetts time,
on March 31, 2008, at the office of the Rights Agent designated for such
purpose, or at the office of its successor as Rights Agent, one-six thousand
seven hundred fiftieth of a fully paid non-assessable share of Series A Junior
Participating Preferred Stock (the "Preferred Shares") of the Company at a
                                    ----------------
purchase price of $125.00 per one-six thousand seven hundred fiftieth of a
Preferred Share (the "Purchase Price"), upon presentation and surrender of this
                      --------------
Rights Certificate with the Form of Election to Purchase and related Certificate
duly executed. The number of Rights evidenced by this Rights Certificate (and
the number of one-six thousand seven hundred fiftieths of a Preferred Share
which may be purchased upon exercise hereof) set forth above, are the number and
Purchase Price as of March 31, 1998, based on the Preferred Shares as
constituted at such date. As provided in the Rights Agreement, the Purchase
Price and the number and kind of Preferred

___________________
/*/ The portion of the legend in bracket shall be inserted only if applicable
and shall replace the preceding sentence.
<PAGE>
 
Shares or other securities which may be purchased upon the exercise of the
Rights evidenced by this Rights Certificate are subject to modification and
adjustment upon the happening of certain events.

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

     Subject to the provisions of the Rights Agreement, the Rights evidenced by
this Rights Certificate (i) may be redeemed by the Company, at its option, at a
redemption price of $0.000148 per Right or (ii) may be exchanged by the Company
in whole or in part for Common Shares, substantially equivalent rights or other
consideration as determined by the Company.

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

     At the election of the Company, no fractional portion less than integral
multiples of one-six thousand seven hundred fiftieth of a Preferred Share will
be issued upon the exercise of any Right or Rights evidenced hereby but in lieu
thereof a cash payment will be made, as provided in the Rights Agreement.

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

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

                                      -2-
<PAGE>
 
     WITNESS the facsimile signature of the proper officers of the Company and
its corporate seal. Dated as of ________________, 199__.


ATTEST:                            ORACLE CORPORATION

                              
_____________________________      By:___________________________
Secretary


Countersigned:

BANKBOSTON, N.A.

as Rights Agent


By:__________________________
   Authorized Signatory

                                      -3-
<PAGE>
 
                  FORM OF REVERSE SIDE OF RIGHTS CERTIFICATE

                              FORM OF ASSIGNMENT

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


FOR VALUE RECEIVED________________________________________hereby sells, assigns
and transfers unto_____________________________________________________________

                 (Please print name and address of transferee)

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

Dated:____________, _____


                                   _________________________________
                                   Signature


Signature Guaranteed:

     Signatures must be guaranteed by a member firm of a registered national
securities exchange, a member of the National Association of Securities Dealers,
Inc., a commercial bank or trust company having an office or correspondent in
the United States or any other member of a medallion signature guarantee program
approved by the Securities Transfer Association.
<PAGE>
 
                                  CERTIFICATE

The undersigned hereby certifies by checking the appropriate boxes that:

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

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

Dated:___________________,_____


 
                                   ______________________________
                                   Signature

Signature Guaranteed:

     Signatures must be guaranteed by a member firm of a registered national
securities exchange, a member of the National Association of Securities Dealers,
Inc., a commercial bank or trust company having an office or correspondent in
the United States or any other member of a medallion signature guarantee program
approved by the Securities Transfer Association.
<PAGE>
 
            Form of Reverse Side of Rights Certificate -- continued

                         FORM OF ELECTION TO PURCHASE

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


To:____________________________

     The undersigned hereby irrevocably elects to exercise____________________
Rights represented by this Rights Certificate to purchase the number of one-six
thousand seven hundred fiftieths of a Preferred Share issuable upon the exercise
of such Rights and requests that certificates for such number of one-six
thousand seven hundred fiftieths of a Preferred Share be issued in the name of:

Please insert social security or other identifying number

________________________________________________________________________________
                        (Please print name and address)
                                                        
________________________________________________________________________________

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

Please insert social security or other identifying number

________________________________________________________________________________
                        (Please print name and address)
                                                        
________________________________________________________________________________

Dated:________________,_____


                                   __________________________________
                                   Signature


Signature Guaranteed:

     Signatures must be guaranteed by a member firm of a registered national
securities exchange, a member of the National Association of Securities Dealers,
Inc., a commercial bank or trust company having an office or correspondent in
the United States or any other member of a medallion signature guarantee program
approved by the Securities Transfer Association.
<PAGE>
 
                                  CERTIFICATE
                                  -----------

     The undersigned hereby certifies by checking the appropriate boxes that:

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

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

Dated:_________________,____



                                   ________________________________
                                   Signature

Signature Guaranteed:

     Signatures must be guaranteed by a member firm of a registered national
securities exchange, a member of the National Association of Securities Dealers,
Inc., a commercial bank or trust company having an office or correspondent in
the United States or any other member of a medallion signature guarantee program
approved by the Securities Transfer Association.
<PAGE>
 
            Form of Reverse Side of Rights Certificate -- continued

                                    NOTICE
                                    ------

     The signature in the foregoing Forms of Assignment and Election must
conform to the name as written upon the face of this Rights Certificate in every
particular, without alteration or enlargement or any change whatsoever.
<PAGE>
 
                                   EXHIBIT B
                                   ---------

                             SUMMARY OF RIGHTS TO

                           PURCHASE PREFERRED SHARES



          On December 3, 1990, the Board of Directors of Oracle Corporation (the
"Company") declared a dividend of one preferred share purchase right (a "Right")
for each outstanding share of common stock, par value $0.01 per share (the
"Common Shares"), of the Company.  The dividend was paid to stockholders of
record on December 31, 1990 (the "Record Date").  On each of January 10, 1994
and March 31, 1998, the Company amended the terms of the Rights.  As of the date
hereof, if certain events related to an unsolicited takeover attempt occur, each
Right entitles the registered holder to purchase from the Company one-six
thousand seven hundred fiftieth of a share of Series A Junior Participating
Preferred Stock, par value $0.01 per share (the "Preferred Shares"), of the
Company, at a price of $125.00 per one-six thousand seven hundred fiftieth of a
Preferred Share (the "Purchase Price"), subject to adjustment.  The description
and terms of the Rights are set forth in an Amended and Restated Preferred
Shares Rights Agreement (the "Rights Agreement") between the Company and
BankBoston, N.A., as Rights Agent, dated as of March 31, 1998.

          Until the earlier to occur of (i) 10 days (or such later date as may
be determined by action of a majority of the Company's Directors then in office
not affiliated with the acquiring person or group (the "Continuing Directors"))
following a public announcement that a person, or group of affiliated or
associated persons (an "Acquiring Person"), has acquired beneficial ownership of
15% or more of the outstanding Common Shares (the date of such announcement
being the "Shares Acquisition Date") or (ii) 10 days (or such later date as may
be determined by action of a majority of the Continuing Directors then in
office) following the date that a tender offer or exchange offer is first
published or sent, the consummation of which would result in the beneficial
ownership by a person or group of 15% or more of such 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 certificates
outstanding as of March 31, 1998, by such Common Share certificates and no
separate Rights Certificates will be distributed.

          The Rights Agreement provides that, until the Distribution Date, 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 upon transfer or new issuance of Common Shares
will contain a notation incorporating the Rights Agreement by reference.  Until
the Distribution Date (or earlier redemption or expiration of the Rights), the
surrender for transfer of any certificates for Common Shares outstanding as of
March 31, 1998, even without such notation or a copy of the Summary of Rights
being attached thereto, will also constitute the transfer of the Rights
associated with the Common Shares represented by such certificate.  As soon as
practicable following the Distribution Date, separate certificates evidencing
the Rights ("Right Certificates") will be mailed to holders of record of the
Common 
<PAGE>
 
Shares as of the close of business on the Distribution Date and such separate
Right Certificates alone will evidence the Rights.

          The Rights Agreement provides that Lawrence J. Ellison and his
affiliates, associates and successors, certain successors thereto, and any 
other transfers approved by the Company's Board of Directors shall not be or
become an Acquiring Person on account of the beneficial ownership of Common
Shares of the Company by any of them as of March 26, 1998, so long as Ellison
and his affiliates, associates and successors do not acquire from any third
party other than the Company, in the aggregate, beneficial ownership of more
than an additional 1% of the Company's Common Shares.

          The Rights are not exercisable until the Distribution Date.  The
Rights will expire on March 26, 2008 (the "Final Expiration Date"), unless the
Final Expiration Date is extended or unless the 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 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 Common Shares or Preferred Shares
of certain rights or warrants to subscribe for or purchase Common Shares or
Preferred Shares at a price, or securities convertible into Common Shares or
Preferred Shares with a conversion price, less than the then current market
price of the Common Shares or Preferred Shares or (iii) upon the distribution to
holders of the Common Shares or Preferred Shares of evidences of indebtedness or
assets (excluding regular periodic cash dividends paid out of earnings or
retained earnings or dividends payable in Common Shares) or of subscription
rights or warrants (other than those referred to above).

          The number of outstanding Rights and the number of Preferred Shares
issuable upon exercise of each Right are also subject to adjustment in the event
of 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 Rights will not be
redeemable and are junior to any other series of preferred stock the Company may
issue (unless otherwise provided in the terms of such stock).  Each Preferred
Share will be entitled to a quarterly dividend payment of 6,750 times the
dividend declared per Common Share.  In the event of liquidation, each Preferred
Share will be entitled to a $6,750.00 preference, and thereafter the holders of
the Preferred Shares will be entitled to an aggregate payment of 6,750 times the
aggregate payment made per Common Share.  Each Preferred Share will have 6,750
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 6,750 times the amount received
per Common Share.  These rights are protected by customary antidilution
provisions.
<PAGE>
 
          Because of the nature of the Preferred Shares' dividend, liquidation
and voting rights, the value of the one-six thousand seven hundred fiftieth
interest in a Preferred Share purchasable upon exercise of each Right should
approximate the value of one Common Share.

          In the event that, after the Shares Acquisition Date, 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, proper provision will be made
so that each holder of a Right, other than Rights beneficially owned by an
Acquiring Person, will thereafter have the right to receive, upon the exercise
thereof at the then current exercise price of the Right, that number of shares
of common stock of the acquiring company which at the time of such transaction
will have a market value of two times the exercise price of the Right.

          In the event that any person 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 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 Right.  If the
Company does not have authorized but unissued Common Shares sufficient to
satisfy such obligation to issue Common Shares, the Company is obligated to
deliver upon payment of the exercise price of a Right an amount of cash or other
securities equivalent in value to the Common Shares issuable upon exercise of a
Right.

          At any time after any person becomes an Acquiring Person and prior to
the acquisition by such person or group of 50% or more of the outstanding Common
Shares, by a majority vote of the Board of Directors, the Company may exchange
the Rights (other than Rights owned by such person or group which have become
void), in whole or in part, for Common Shares at an exchange ratio of one Common
Share per 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.  At the election of the Company, no fractional Preferred
Shares will be issued (other than fractions which are integral multiples of the
one-six thousand seven hundred fiftieths of a Preferred Share 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 earlier of (i) the close of business on the
tenth day following the Shares Acquisition Date, or such later date as may be
determined by a majority of Continuing Directors then in office, and (ii) the
expiration date of the Rights, the Board of Directors of the Company may redeem
the Rights in whole, but not in part, at a price of $0.000148 per Right (the
"Redemption Price").  The redemption of the Rights may be made effective at such
time, on such basis and with such conditions as the Board of Directors in its
sole discretion may establish.  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 Redemption Price.  Notwithstanding any
other provision of the Rights Agreement, if the Board of Directors authorizes
redemption of the Rights on or after the time a person becomes an 
<PAGE>
 
Acquiring Person, then there must be Continuing Directors then in office and
such authorization shall require the concurrence of a majority of such
Continuing Directors.

          The terms of the Rights may be amended in any respect by the Board of
Directors of the Company without the consent of the holders of the Rights,
except that, from and after the Distribution Date, no such amendments shall be
made without the approval of the holders of the Rights other than amendments
made to (i) cure ambiguities, (ii) correct or supplement provisions that may be
defective or inconsistent with other provisions of the Rights Agreement, (iii)
shorten or lengthen any time period under the Rights Agreement (provided that
following the tenth day following the Shares Acquisition Date such amendments
may be made only if there are Continuing Directors then in office and with the
concurrence of a majority of such Continuing Directors, or (iv) change or
supplement the provisions of the Rights Agreement in any manner the Company may
deem necessary provided that such change or supplement does not adversely affect
the interests of the holders of the Rights (other than an Acquiring Person).
Notwithstanding the foregoing, the terms of the Rights may not be supplemented
or amended from and after the Distribution Date to lengthen a time period
relating to when the Rights may be redeemed at a time when the Rights are not by
their terms redeemable or lengthen any other time period unless such lengthening
is for the purpose of protecting, enhancing or clarifying the rights of, and/or
the benefits to, the holders of 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 receive dividends.

          A copy of the Rights Agreement has been filed with the Securities and
Exchange Commission as an Exhibit to a Form 8-A/A amending a Registration
Statement on Form 8-A. 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 incorporated herein by reference.

<PAGE>

                                                                EXHIBIT 2
 
                           CERTIFICATE OF AMENDMENT
                                      OF
                         CERTIFICATE OF INCORPORATION

        Oracle Corporation, a corporation organized and existing under the laws 
of the State of Delaware, hereby certifies as follows:

        1.  The name of the corporation is Oracle Corporation, and the date of 
filing of its original Certificate of Incorporation with the Secretary of State 
was October 29, 1986.

        2.  Article 4 of the Certificate of Incorporation is amended to read, in
full, as follows:

        "The total number of shares of stock of all classes which the
        corporation has the authority to issue is 1,001,000,000, consisting of
        1,000,000,000 shares of Common Stock with a par value of $0.01 per
        share, and 1,000,000 shares or Preferred Stock with a par value of $0.01
        per share."

        3.  This Certificate of Amendment of Certificate of Incorporation has 
been duly adopted in accordance with the provisions of Section 242 of the 
General Corporation Law of the State of Delaware.

        IN WITNESS WHEREOF, Oracle Corporation has caused this Certificate to be
signed and attested by its duly authorized officers of this 13th day of March, 
1996.


                                                ORACLE CORPORATION
                                                a Delaware Corporation



                                                By: /s/ Raymond L. Ocampo, Jr.
                                                   -----------------------------
                                                    Senior Vice President,
                                                    General Counsel &
                                                    Corporation Secretary






ATTEST:

By: /s/ L. Patricia Moncada
   ---------------------------
   Assistant Secretary
   L. Patricia Moncada


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