ASPECT DEVELOPMENT INC
8-K, 1998-10-13
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<PAGE>
 
                     SECURITIES AND EXCHANGE COMMISSION

                          Washington, D. C.  20549

                                  FORM 8-K

                    RELATING TO ADOPTION OF A RIGHTS PLAN


                   Pursuant to Section 13 or 15(d) of the
                       Securities Exchange Act of 1934


      Date of Report (Date of earliest event reported):  September 1, 1998



                          ASPECT DEVELOPMENT, INC.
           (Exact name of registrant as specified in its charter)


                                  DELAWARE
               (State or other jurisdiction of incorporation)



           0-20749                                     25-1622857
     (Commission File No.)                  (IRS Employer Identification No.)



                           _______________________
                            1300 CHARLESTON ROAD
                          MOUNTAIN VIEW, CA  94043
            (Address of principal executive offices and zip code)



     Registrant's telephone number, including area code: (650) 428-2700



                           _______________________
<PAGE>
 
Item 5. Other Events.
        ------------ 

          On September 1, 1998 the Board of Directors of Aspect Development,
Inc. (the "Company") approved the adoption of a Share Purchase Rights Plan
(the "Plan"). Terms of the Plan provide for a dividend distribution of one
preferred share purchase right (a "Right") for each outstanding share of
common stock, par value $.001 per share (the "Common Shares"), of the Company.
The dividend is payable on October 22, 1998 (the "Record Date") to the
stockholders of record on that date. Each Right entitles the registered holder
to purchase from the Company one one-hundredth of a share of Series A Junior
Participating Preferred Stock, par value $.001 per share (the "Preferred
Shares"), at a price of $187.50 per one one-hundredth of a Preferred Share
(the "Purchase Price"), subject to adjustment. Each one one-hundredth of a
share of Preferred Shares has designations and powers, preferences and rights,
and the qualifications, limitations and restrictions which make its value
approximately equal to the value of a Common Share. The description and terms
of the Rights are set forth in a Rights Agreement (the "Rights Agreement"),
dated as of October 7, 1998 entered into between the Company and U.S. Stock
Transfer Corporation, as rights agent (the "Rights Agent").

          Initially, the Rights will be evidenced by the stock certificates
representing the Common Shares then outstanding, and no separate Right
Certificates, as defined, will be distributed.  Until the earlier to occur of
(i) the date of a public announcement that a person, entity or group of
affiliated or associated persons have acquired beneficial ownership of 15% or
more of the outstanding Common Shares (an "Acquiring Person") or (ii) 10
business days (or such later date as may be determined by action of the Board of
Directors prior to such time as any person or entity becomes an Acquiring
Person) following the commencement of, or announcement of an intention to
commence, a tender offer or exchange offer the consummation of which would
result in any person or entity becoming an Acquiring Person (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 the Record
Date, by such Common Share certificate with or without a copy of the Summary of
Rights, which is included in the Rights Agreement as Exhibit C thereof (the
"Summary of Rights").

          Until the Distribution Date, the Rights will be transferable with and
only with the Common Shares.  Until the Distribution Date (or earlier redemption
or expiration of the Rights), new Common Share certificates issued after the
Record Date, upon transfer or 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 or transfer of any certificates for Common Shares outstanding as of
the Record Date, 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.

                                       1
<PAGE>
 
          The Rights are not exercisable until the Distribution Date.  The
Rights will expire on October 7, 2008 (the "Final Expiration Date"), 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 other property, 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 Preferred Shares of certain rights
or warrants to subscribe for or purchase Preferred Shares at a price, or
securities convertible into Preferred Shares with a conversion price, less than
the then current market price of the Preferred Shares or (iii) upon the
distribution to holders of the Preferred Shares of evidences of indebtedness or
assets (excluding regular periodic cash dividends paid out of earnings or
retained earnings or dividends payable in Preferred Shares) or of subscription
rights or warrants (other than those referred to above).  The exercise of Rights
for Preferred Shares is at all times subject to the availability of a sufficient
number of authorized but unissued Preferred Shares.

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

          Preferred Shares purchasable upon exercise of the Rights will not be
redeemable.  Each Preferred Share will be entitled to a minimum preferential
quarterly dividend payment of $1.00 but will be entitled to an aggregate
dividend of 100 times the dividend declared per Common Share.  In the event of
liquidation, the holders of the Preferred Shares would be entitled to a minimum
preferential liquidation payment of $100 per share, but would be entitled to
receive an aggregate payment equal to 100 times the payment made per Common
Share.  Each Preferred Share will have 100 votes, voting together with the
Common Shares.  Finally, in the event of any merger, consolidation or other
transaction in which Common Shares are exchanged, each Preferred Share will be
entitled to receive 100 times the amount of consideration received per Common
Share.  These rights are protected by customary anti-dilution provisions.
Because of the nature of the Preferred Shares' dividend and liquidation rights,
the value of one one-hundredth of a Preferred Share should approximate the value
of one Common Share.  The Preferred Shares would rank junior to any other series
of the Company's preferred stock.

          In the event that any person or group of affiliated or associated
persons becomes an Acquiring Person, proper provision shall be made so that each
holder of a Right, other than Rights beneficially owned by the Acquiring Person
and its associates and affiliates (which will thereafter be void), will for a
60-day period 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 (or,
if such number of shares is not and cannot be authorized, the Company may issue
Preferred Shares, cash, debt, stock or a combination thereof in exchange for the
Rights).  This right will terminate 60 days after the date on which the Rights
become nonredeemable (as described below), unless 

                                       2
<PAGE>
 
there is an injunction or similar obstacle to exercise of the Rights, in which
event this right will terminate 60 days after the date on which the Rights
again become exercisable.

          Generally, under the Plan, an "Acquiring Person" shall not be deemed
to include (i) the Company, (ii) a subsidiary of the Company, (iii) any employee
benefit or compensation plan of the Company, (iv) any entity holding Common
Shares for or pursuant to the terms of any such employee benefit or compensation
plan, or (v) an Excluded Person (as such term is hereinafter defined).  In
addition, except under limited circumstances, no person or entity shall become
an Acquiring Person as the result of the acquisition of Common Shares by the
Company which, by reducing the number of shares outstanding, increases the
proportionate number of shares beneficially owned by such person or entity to
15% or more of the Common Shares then outstanding.  Further, except under
certain circumstances, no person shall become an Acquiring Person due to the
acquisition of Common Shares directly from the Company.  Romesh Wadhwani and his
associates and affiliates will be an Excluded Person so long as they hold, in
the aggregate, 30% or less of the Company's outstanding common shares.

          In the event that the Company is acquired in a merger or other
business combination transaction or 50% or more of its consolidated assets or
earning power are sold to an Acquiring Person, its associates or affiliates or
certain other persons in which such persons have an interest, proper provision
will be made so that each holder of a Right will thereafter have the right to
receive, upon the exercise thereof at the then current exercise price of the
Right, that number of shares of common stock of the acquiring company which at
the time of such transaction will have a market value of two times the exercise
price of the Right.

          At any time after an Acquiring Person becomes an Acquiring Person and
prior to the acquisition by such Acquiring Person of 50% or more of the
outstanding Common Shares, the Board of Directors of the Company may exchange
the Rights (other than Rights owned by such person or group which have become
void), in whole or in part, at an exchange ratio of one Common Share, or one
one-hundredth of a Preferred Share, per Right (or, at the election of the
Company, the Company may issue cash, debt, stock or a combination thereof in
exchange for the Rights), subject to adjustment.

          With certain exceptions, no adjustment in the Purchase Price will be
required until cumulative adjustments require an adjustment of at least 1% in
such Purchase Price.  No fractional Preferred Shares will be issued (other than
fractions which are integral multiples of the number of one one-hundredths of a
Preferred Share issuable upon the exercise of one Right, which may, at the
election of the Company, be evidenced by depositary receipts), and in lieu
thereof, an adjustment in cash will be made based on the market price of the
Preferred Shares on the last trading day prior to the date of exercise.

          At any time prior to the earliest of (i) the day of the first public
announcement that a person has become an Acquiring Person or (ii) the Final
Expiration Date, the Board of Directors of the Company may redeem the Rights in
whole, but not in part, at a price of $.001  per Right (the "Redemption Price").
Following the expiration of the above periods, the Rights become nonredeemable.
Immediately upon any redemption of the Rights, the right to exercise 

                                       3
<PAGE>
 
the Rights will terminate and the only right of the holders of Rights will be
to receive the Redemption Price.

          The terms of the Rights may be amended by the Board of Directors of
the Company without the consent of the holders of the Rights, except that from
and after such time as the rights are distributed no such amendment may
adversely affect the interest of the holders of the Rights excluding the
interests of an Acquiring Person.

          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.

          The Rights have certain anti-takeover effects.  The Rights will cause
substantial dilution to a person or group that attempts to acquire the Company
on terms not approved by the Company's Board of Directors.  The Rights should
not interfere with any merger or other business combination approved by the
Board of Directors since the Rights may be amended to permit such acquisition or
redeemed by the Company at $.001 per Right prior to the earliest of (i) the time
that a person or group has acquired beneficial ownership of 15% or more of the
Common Shares or (ii) the final expiration date of the rights.


Item 7. Exhibits.
        -------- 

Exhibit
- -------

99.1      Press Release, dated as of October 13, 1998 entitled "Aspect
          Development, Inc. Adopts Shareholder Rights Plan."

99.2      Rights Agreement dated as of October 7, 1998 among Aspect Development,
          Inc. and U.S. Stock Transfer Corporation.

99.3      Registrant's Certificate of Designation of Series A Junior
          Participating Preferred Stock.

99.4      Form of Rights Certificate.

                                       4
<PAGE>
 
                                  SIGNATURE

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


                                       ASPECT DEVELOPMENT, INC.


Dated:  October 13, 1998               By: /s/ David S. Dury
                                          ----------------------------------
                                          David S. Dury
                                          Vice President and
                                          Chief Financial Officer
 

                                       5
<PAGE>
 
                              INDEX TO EXHIBITS
                              -----------------



               99.1  Press Release, dated as of October 13, 1998 entitled
               "Aspect Development, Inc. Adopts Shareholder Rights Plan."

               99.2  Rights Agreement dated as of October 7, 1998 among Aspect
               Development, Inc. and U.S. Stock Transfer Corporation.

               99.3  Registrant's Certificate of Designation of Series A
               Junior Participating Preferred Stock

               99.4  Form of Rights Certificate.

                                       6

<PAGE>
 
                                                                  EXHIBIT 99.1


Aspect Development, Inc. Adopts Shareholder Rights Plan
New plan established to discourage any future hostile takeover attempts

MOUNTAIN VIEW, Calif.  October 13, 1998/Business Wire/ -- Aspect Development,
Inc. NASDAQ: ASDV (the "Company") announced that its Board of Directors approved
the adoption of a Shareholder Rights Plan under which all shareholders of record
as of October 22, 1998 (the "Record Date") will receive rights to purchase
shares of a new series of Preferred Stock.

PREVENTIVE MEASURE

The Rights Plan is designed to enable all of the Company's shareholders to
realize the full value of their investment and to provide for fair and equal
treatment for all stockholders in the event that an unsolicited attempt is made
to acquire the Company.  The adoption of the Rights Plan is intended to prevent
abusive takeover tactics, and is not in response to any particular proposal.

The rights will be distributed as a non-taxable dividend and will expire on
October 7, 2008.  The rights will be exercisable only if a person or group
acquires 15 percent or more of the Company's Common Stock or announces a tender
offer for 15 percent of the Common Stock.  If a person acquires 15 percent or
more of the more of the Company's Common Stock, all rightsholders except the
buyer will be entitled to acquire the Company's Common Stock at a discount.  The
effect will be to discourage acquisitions of more than 15 percent of the
Company's Common Stock without negotiations with Board.  Dr. Romesh Wadhwani and
his affiliates and associates, who currently beneficially own more than 20
percent of the Company's outstanding Common Stock, will be exempt from operation
of the Rights Plan unless they acquire or make a tender offer for beneficial
ownership of 30 percent or more of the Company's Common Stock.

ASPECT ADOPTS SHAREHOLDER RIGHTS PLAN

The rights will trade with the Company's Common Stock, unless and until they are
separated upon the occurrence of certain future events. The Company's Board of
Directors may terminate the Rights Plan at any time or redeem the rights prior
to the time a person acquires more than 15 percent of the Company's Common
Stock. Additional details regarding the Rights Plan will be outlined in a
summary to be mailed to all stockholders following the Record Date.
ABOUT ASPECT DEVELOPMENT, INC. (NASDAQ: ASDV)

Aspect Development, Inc. is the leading worldwide provider of enterprise systems
for Component & Supplier Management (CSM).  Aspect CSM solutions reduce product
cost, operations expense and design cycle time by providing strategic decision
support for procurement, product development and operations to manufacturers in
the electronics, aerospace & defense, automotive, industrial, process and CPG
markets.  Aspect provides one-stop solutions that uniquely combine its
enterprise software, content products and rapid deployment services, to deliver
a large value proposition quickly, at low risk.  Aspect CSM solutions are being
used by 
<PAGE>
 
many of the largest manufacturers worldwide to optimize their inbound
supply chain, to provide the information bridge between design and procurement,
and to technology-enable and automate best practices such as strategic sourcing,
preferred component and supplier management, design reuse, and rapid selection
of the best components.

This press release contains forward-looking statements that involve risks and
uncertainties.  The success of Aspect Development may differ from the results
discussed or forecasted in the forward-looking statements due to factors that
include, but are not limited to, risks associated with the assimilation of
Cadis, Inc., risks associated with potential difficulties or delays in the
integration of existing products and technologies or development of new products
and technologies, challenges associated with growth, the risk of loss of key
personnel, diversion of management attention from other business concerns, and
risks of entering new markets, including the risk of variations in quarterly
operating results due to the timing of significant orders and other factors,
significant current and expected additional Competition and the need to continue
to expand product distribution, particularly internationally. Further
information on potential factors that could affect the financial results of
Aspect are included in the company's Form 10-KSB for the year ended December 31,
1997 which is on file with the Securities and Exchange Commission.

Aspect's corporate headquarters are in Mountain View, California.  For more
information on Aspect's complete line of CSM products and services, contact
Aspect at (800) 941-1046, via electronic mail at [email protected] via the Web
                                                 ------------------            
at http://www.aspectdv.com.
   ----------------------- 

                                     # # #

<PAGE>
 
                                                                    EXHIBIT 99.2
 

         ___________________________________________________________
                                        
                          ASPECT DEVELOPMENT, INC.
                                        
                                     and
                                        
                      U. S. STOCK TRANSFER CORPORATION,
                               AS RIGHTS AGENT
                                        
                              Rights Agreement
                                        
                       Dated as of October 7, 1998
                                        
         ___________________________________________________________
<PAGE>
 
                                  TABLE OF CONTENTS
<TABLE>
<CAPTION> 
                                                                                                                 PAGE
<S>          <C>                                                                                                 <C>
Section 1.   Certain Definitions................................................................................   1
Section 2.   Appointment of Rights Agent........................................................................   5
Section 3.   Issue of Right Certificates........................................................................   5
Section 4.   Form of Right Certificates.........................................................................   7
Section 5.   Countersignature and Registration..................................................................   8
Section 6.   Transfer, Split Up, Combination and Exchange of Right Certificates; Mutilated, Destroyed, Lost or
             Stolen Right Certificates..........................................................................   9
Section 7.   Exercise of Rights; Purchase Price; Expiration Date of Rights......................................  10
Section 8.   Cancellation and Destruction of Right Certificates.................................................  11
Section 9.   Availability of Preferred Shares...................................................................  12
Section 10.  Preferred Shares Record Date.......................................................................  13
Section 11.  Adjustment of Purchase Price, Number of Shares or Number of Rights.................................  13
Section 12.  Certificate of Adjusted Purchase Price or Number of Shares.........................................  22
Section 13.  Consolidation, Merger or Sale or Transfer of Assets or Earning Power...............................  22
Section 14.  Fractional Rights and Fractional Shares............................................................  26
Section 15.  Rights of Action...................................................................................  27
Section 16.  Agreement of Right Holders.........................................................................  28
Section 17.  Right Certificate Holder Not Deemed a Stockholder..................................................  28
Section 18.  Concerning the Rights Agent........................................................................  29
Section 19.  Merger or Consolidation or Change of Name of Rights Agent..........................................  29
Section 20.  Duties of Rights Agent.............................................................................  30
Section 21.  Change of Rights Agent.............................................................................  32
Section 22.  Issuance of New Right Certificates.................................................................  33
Section 23.  Redemption.........................................................................................  34
Section 24.  Exchange...........................................................................................  35
Section 25.  Notice of Certain Events...........................................................................  38
Section 26.  Notices............................................................................................  38
Section 27.  Supplements and Amendments.........................................................................  39
</TABLE> 

                                       i.
<PAGE>
 
                               TABLE OF CONTENTS
                                  (CONTINUED)
<TABLE>
<CAPTION> 
                                                                                                                 PAGE
<S>          <C>                                                                                                 <C>
Section 28.  Determination and Actions by the Board of Directors, etc...........................................  40
Section 29.  Successors.........................................................................................  40
Section 30.  Benefits of this Agreement.........................................................................  40
Section 31.  Severability.......................................................................................  40
Section 32.  Governing Law......................................................................................  40
Section 33.  Counterparts.......................................................................................  41
Section 34.  Descriptive Headings...............................................................................  41
</TABLE>

Exhibit A -  Certificate of Designation

Exhibit B -  Form of Right Certificate

Exhibit C -  Summary of Rights to Purchase Preferred Shares

                                      ii.
<PAGE>
 
                              RIGHTS AGREEMENT


     THIS RIGHTS AGREEMENT ("AGREEMENT"), dated as of October 7, 1998,
between ASPECT DEVELOPMENT, INC., a Delaware corporation (the "Company"), and U.
S. STOCK TRANSFER CORPORATION ("Rights Agent").

     The Board of Directors of the Company has authorized and declared a
dividend of one preferred share purchase right (a "Right") for each Common Share
(as such term is hereinafter defined) outstanding at the close of business on
October 22, 1998 (the "Record Date"), each Right representing the right to
purchase one one-hundredth of a Preferred Share (as such term is hereinafter
defined), upon the terms and subject to the conditions herein set forth, and has
further authorized and directed the issuance of one Right with respect to each
Common Share that shall become outstanding between the Record Date and the
earliest to occur of the Distribution Date, the Redemption Date and the Final
Expiration Date (as such terms are hereinafter defined); provided, however, that
Rights may be issued with respect to Common Shares that shall become outstanding
after the Distribution Date and prior to the earlier of the Redemption Date and
the Final Expiration Date in accordance with the provisions of Section 22
hereof.

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

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

            (a)    "ACQUIRING PERSON" shall mean any Person (as such term is
                   hereinafter defined) who or which, together with all
                   Affiliates and Associates (as such terms are hereinafter
                   defined) of such Person, shall be the Beneficial Owner (as
                   such term is hereinafter defined) of 15% or more of the
                   Common Shares then outstanding. Notwithstanding the
                   foregoing, (A) the term Acquiring Person shall not include
                   (i) the Company, (ii) any Subsidiary (as such term is
                   hereinafter defined) of the Company, (iii) any employee
                   benefit or compensation plan of the Company or any
                   Subsidiary of the Company, (iv) any entity holding Common
                   Shares for or pursuant to the terms of any such employee
                   benefit or compensation plan, or (v) an Excluded Person (as
                   such term is hereinafter defined) and (B) no Person shall
                   become an "Acquiring Person" either (x) as the result of an
                   acquisition of Common Shares by the Company which, by
                   reducing the number of shares outstanding, increases the
                   proportionate number of shares beneficially owned by such
                   Person to 15% or more of the Common Shares then
                   outstanding; provided, however, that if a Person shall
                   if a Person shall become the Beneficial Owner of 15% or more
                   of the Common Shares then outstanding by reason of share
                   purchases by the Company and shall, following written notice
                   from, or public disclosure by the Company of such share
                   purchases by the Company, become the Beneficial Owner of any
                   additional Common Shares without the prior consent of the
                   Company

                                       1
<PAGE>
 
                   and shall then Beneficially Own more than 15% of the Common
                   Shares then outstanding, then such Person shall be deemed to
                   be an "Acquiring Person," or (y) as a result of the
                   acquisition of Common Shares directly from the Company,
                   provided, however, that if a Person shall become the
                   Beneficial Owner of 15% (30% in the case of an Excluded
                   Person) or more of the Common Shares then outstanding by
                   reason of share purchases directly from the Company and
                   shall, after that date, become Beneficial owner of any
                   additional Common Shares without the prior written consent
                   of the Company and shall then Beneficially Own more than
                   15% (30% in the case of an Excluded Person) of the Common
                   Shares then outstanding, then such Person shall be deemed
                   to be an "Acquiring Person" or (z) if the Board of
                   Directors determines in good faith that a Person who would
                   otherwise be an "Acquiring Person," as defined pursuant to
                   the foregoing provisions of this paragraph (a), has become
                   such inadvertently, and such Person divests, as promptly as
                   practicable (as determined in good faith by the Board of
                   Directors), but in any event within five Business Days,
                   following receipt of written notice from the Company of
                   such event, of Beneficial Ownership of 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 an "Acquiring Person" for any purposes
                   of this Agreement.

             (b)   "AFFILIATE" and "ASSOCIATE" shall have the respective
                   meanings ascribed to such terms in Rule 12b-2 of the
                   General Rules and Regulations under the Securities Exchange
                   Act of 1934, as amended (the "Exchange Act"), as in effect
                   on the date of this Agreement; provided, however, that the
                   limited partners of a limited partnership shall not be
                   deemed to be Associates of such limited partnership solely
                   by virtue of their limited partnership interests.

             (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 is deemed to beneficially own, within
                          the meaning of Rule 13d-3 of the General Rules and
                          Regulations under the Exchange Act as in effect on
                          the date of this Rights Agreement ;

                   (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 

                                       2
<PAGE>
 
                          (other than these Rights), warrants or options, or
                          otherwise; provided, however, that a Person shall
                          not be deemed the Beneficial Owner of, or to
                          beneficially own, securities tendered pursuant to a
                          tender or exchange offer made by or on behalf of
                          such Person or any of such Person's Affiliates or
                          Associates until such tendered securities are
                          accepted for purchase or exchange; or (B) 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 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 promulgated under 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 with which such Person or any of
                          such Person's Affiliates or Associates has 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) for the purpose of
                          acquiring, holding, voting (except to the extent
                          contemplated by the proviso to Section 1(c)(ii)(B)
                          hereof) or disposing of any securities of the Company;
                          provided, however, an agreement, arrangement or
                          understanding for purposes of this Section 1(c)(iii)
                          shall not be deemed to include actions, including any
                          agreement, arrangement or understanding, or statements
                          by any member of the Company's Board of Directors on
                          the date of this Agreement, any subsequent directors
                          of the Company (the "Successor Directors") who have
                          been nominated by a majority of directors who are
                          directors as of the date of this Agreement or who are
                          Successor Directors, or by any Person of whom such a
                          director is an Affiliate or Associate, provided,
                          however, that this exception shall not apply to a
                          particular Person or Persons if and to the extent that
                          such Person or Persons, after the date of this
                          Agreement, acquires Beneficial Ownership of more than
                          an additional 5% of the then outstanding Common Shares
                          of the Company unless (A) the shares are acquired
                          directly from the Company or as part of an employee
                          benefit or compensation plan of the Company or a
                          subsidiary of the Company or (b) the Person
                          establishes to the satisfaction of the directors of
                          the Company that it is acting on its own behalf and
                          not in concert with any other Person and will not,
                          upon completion of any purchases, be the Beneficial
                          Owner of 15% or more of the outstanding Common Shares.

                                       3
<PAGE>
 
Notwithstanding anything in this definition of Beneficial Ownership to the
contrary, the phrase, "then outstanding," when used with reference to a Person's
Beneficial Ownership of securities of the Company, shall mean the number of such
securities then issued and outstanding together with the number of such
securities not then actually issued and outstanding which such Person would be
deemed to own beneficially hereunder.

            (d)    "BUSINESS DAY" shall mean any day other than a Saturday, a 
                   Sunday, or a day on which banking institutions in the State
                   of 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.,
                   Pacific Time, on such date; provided, however, that if such
                   date is not a Business Day it shall mean 5:00 p.m., Pacific
                   Time, on the next succeeding Business Day.

            (f)    "COMMON SHARES" shall mean the shares of common stock, par 
                   value $.001 per share, of the Company; provided, however,
                   that, "Common Shares," when used in this Agreement in
                   connection with a specific reference to any Person other than
                   the Company, shall mean the capital stock (or equity
                   interest) with the greatest voting power of such other Person
                   or, if such other Person is a Subsidiary of another Person,
                   the Person or Persons which ultimately control such first-
                   mentioned Person.

            (g)    "DISTRIBUTION DATE" shall have the meaning set forth in 
                   Section 3 hereof.

            (h)    "EXCLUDED STOCKHOLDER" shall mean Romesh Wadhwani (including 
                   his Affiliates and Associates); provided, however, that
                   Romesh Wadhwani (including his Affiliates and Associates)
                   shall not be an Excluded Stockholder if Romesh Wadhwani
                   (including his Affiliates and Associates) becomes the
                   Beneficial Owner of more than 30% of the outstanding Common
                   Shares without the prior approval of the Board of Directors
                   of the Company.

            (i)    "FINAL EXPIRATION DATE" shall have the meaning set forth in
                   Section 7 hereof.

            (j)    "INTERESTED STOCKHOLDER" shall mean any Acquiring Person or 
                   any Affiliate or Associate of an Acquiring Person or any
                   other Person in which any such Acquiring Person, Affiliate or
                   Associate has an interest, or any other Person acting
                   directly or indirectly on behalf of or in concert with any
                   such Acquiring Person, Affiliate or Associate.

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

            (l)    "PREFERRED SHARES" shall mean shares of Series A Junior 
                   Participating Preferred Stock, par value $.001 per share, of
                   the Company having the 

                                       4
<PAGE>
 
                   designations and the powers, preferences and rights, and the
                   qualifications, limitations and restrictions set forth in the
                   Form of Certificate of Designation attached to this Agreement
                   as Exhibit A.

            (m)    "PURCHASE PRICE" shall have the meaning set forth in Section
                   7(b) hereof.

            (n)    "REDEMPTION DATE" shall have the meaning set forth in 
                   Section 7 hereof.

            (o)    "SHARES ACQUISITION DATE" shall mean the first date of 
                   public announcement by the Company or an Acquiring Person
                   that an Acquiring Person has become such provided, however
                   that, if such Person is determined not to have become an
                   Acquiring Person pursuant to clause (z) of Subsection 1(a)(B)
                   hereof, then no Shares Acquisition Date shall be deemed to
                   have occurred.

            (p)    "SUBSIDIARY" of any Person shall mean any corporation or 
                   other entity of which a majority of the voting power of the
                   voting equity securities or equity interest is owned,
                   directly or indirectly, by such Person.

            (q)    "TRANSACTION" shall mean any merger, consolidation or sale 
                   of assets described in Section 13(a) hereof or any
                   acquisition of Common Shares which would result in a Person
                   becoming an Acquiring Person or a Principal Party (as such
                   term is hereinafter defined).

            (r)    "TRANSACTION PERSON" with respect to a Transaction shall 
                   mean (i) any Person who (x) is or will become an Acquiring
                   Person or a Principal Party (as such term is hereinafter
                   defined) if the Transaction were to be consummated and (y)
                   directly or indirectly proposed or nominated a director of
                   the Company which director is in office at the time of
                   consideration of the Transaction, or (ii) an Affiliate or
                   Associate of such a Person.

SECTION 2.  APPOINTMENT OF RIGHTS AGENT.    The Company hereby appoints the
            Rights Agent to act as agent for the Company in accordance with the
            terms and conditions hereof, and the Rights Agent hereby accepts
            such appointment. The Company may from time to time appoint such co-
            Rights Agents as it may deem necessary or desirable.

SECTION 3.  ISSUE OF RIGHT CERTIFICATES.

            (a)    Until the earlier of (i) the Shares Acquisition Date or (ii) 
                   the tenth Business Day (or such later date as may be
                   determined by action of the Board of Directors prior to such
                   time as any Person becomes an Acquiring Person) after the
                   date of the commencement (determined in accordance with Rule
                   14d-2 under the Exchange Act) 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 entity holding

                                       5
<PAGE>
 
                   Common Shares for or pursuant to the terms of any such plan)
                   of, or of the first public announcement of the intention of
                   any Person (other than the Company, any Subsidiary of the
                   Company, any employee benefit plan of the Company or of any
                   Subsidiary of the Company or any entity holding Common Shares
                   for or pursuant to the terms of any such plan) to commence, a
                   tender or exchange offer (which intention to commence remains
                   in effect for five Business Days after such announcement),
                   the consummation of which would result in any Person becoming
                   an Acquiring Person (including any such date which is after
                   the date of this Agreement and prior to the issuance of the
                   Rights, the earlier of such dates being herein referred to as
                   the "Distribution Date"), (x) the Rights will be evidenced by
                   the certificates for Common Shares registered in the names of
                   the holders thereof (which certificates shall also be deemed
                   to be Right Certificates) and not by separate Right
                   Certificates, and (y) the Rights (and the right to receive
                   Right Certificates therefor) will be transferable only in
                   connection with the transfer of Common Shares. As soon as
                   practicable after the Distribution Date, the Company will
                   prepare and execute, the Rights Agent will countersign, and
                   the Company will send or cause to be sent (and the Rights
                   Agent will, if requested, send) by first-class, insured,
                   postage-prepaid mail, to each record holder of Common Shares
                   as of the Close of Business on the Distribution Date, at the
                   address of such holder shown on the records of the Company, a
                   Right Certificate, in substantially the form of Exhibit B
                   hereto (a "Right Certificate"), evidencing one Right for each
                   Common Share so held, subject to the adjustment provisions of
                   Section 11 of this Rights Agreement. As of the Distribution
                   Date, the Rights will be evidenced solely by such Right
                   Certificates.

            (b)    On the Record Date, or as soon as practicable thereafter, 
                   the Company will send (directly or through the Rights Agent
                   or its transfer agent) a copy of a Summary of Rights to
                   Purchase Preferred Shares, in substantially the form of
                   Exhibit C hereto (the "Summary of Rights"), by first-class,
                   postage-prepaid mail, to each record holder of Common Shares
                   as of the Close of Business on the Record Date, at the
                   address of such holder shown on the records of the Company.
                   With respect to certificates for Common Shares outstanding as
                   of the Record Date, until the Distribution Date, the Rights
                   will be evidenced by such certificates registered in the
                   names of the holders thereof. Until the Distribution Date (or
                   the earlier of the Redemption Date and the Final Expiration
                   Date), the surrender for transfer of any certificate for
                   Common Shares outstanding on the Record Date shall also
                   constitute the transfer of the Rights associated with the
                   Common Shares represented thereby.

            (c)    Certificates for Common Shares which become outstanding 
                   (including, without limitation, reacquired Common Shares
                   referred to in the last sentence of this paragraph (c)) after
                   the Record Date but prior to the earliest of the Distribution
                   Date, the Redemption Date or the Final

                                       6
<PAGE>
 
                   Expiration Date shall have impressed on, printed on, written
                   on or otherwise affixed to them the following legend:

                        This certificate also evidences and entitles the holder
                        hereof to certain rights as set forth in a Rights
                        Agreement between Aspect Development, Inc. (the
                        "Company") and U.S. Stock Transfer Corporation as Rights
                        Agent (the "Rights Agent"), dated as of October 7,
                        1998, as amended from time to time (the "Rights
                        Agreement"), the terms of which are hereby incorporated
                        herein by reference and a copy of which is on file at
                        the principal executive offices of the Company. Under
                        certain circumstances, as set forth in the Rights
                        Agreement, such Rights will be evidenced by separate
                        certificates and will no longer be evidenced by this
                        certificate. The Company will mail to the holder of this
                        certificate a copy of the Rights Agreement without
                        charge after receipt of a written request therefor. As
                        described in the Rights Agreement, Rights issued to any
                        Person who becomes an Acquiring Person or an Affiliate
                        or Associate thereof (as defined in the Rights
                        Agreement) and certain related persons, whether
                        currently held by or on behalf of such Person or by any
                        subsequent holder, shall become null and void.

                   With respect to such certificates containing the foregoing
                   legend, until the Distribution Date, the Rights associated
                   with the Common Shares represented by such certificates shall
                   be evidenced by such certificates alone, and the surrender
                   for transfer of any such certificate shall also constitute
                   the transfer of the Rights associated with the Common Shares
                   represented thereby. In the event that the Company purchases
                   or acquires any Common Shares after the Record Date but prior
                   to the Distribution Date, any Rights associated with such
                   Common Shares shall be deemed 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. Notwithstanding this Section 3(c), the omission
                   of a legend shall not affect the enforceability of any part
                   of this Rights Agreement or the rights of any holder of the
                   Rights.

SECTION 4.  FORM OF RIGHT CERTIFICATES.
            (a)    The Right Certificates (and the form of election to purchase
                   Preferred Shares, the form of assignment and the form of
                   certification to be printed on the reverse thereof) shall be
                   substantially the same as Exhibit B hereto and may have such
                   marks of identification or designation and such legends,
                   summaries or endorsements printed thereon as the Company may
                   deem appropriate and as are not inconsistent with the
                   provisions of this 

                                       7
<PAGE>
 
                   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 Sections 7,11
                   and 22 hereof, the Right Certificates shall entitle the
                   holders thereof to purchase such number of one one-hundredths
                   of a Preferred Share as shall be set forth therein at the
                   price per one one-hundredth of a Preferred Share set forth
                   therein (the "Purchase Price"), but the number of such one
                   one-hundredths of a Preferred Share and the Purchase Price
                   shall be subject to adjustment as provided herein.

            (b)    Any Right Certificate issued pursuant to Section 3(a) or 
                   Section 22 hereof that represents Rights which are null and
                   void pursuant to Section 11(a)(ii) hereof and any Right
                   Certificate issued pursuant to Section 6 or Section 11 hereof
                   upon transfer, exchange, replacement or adjustment of any
                   other Right Certificate referred to in this sentence, shall
                   contain (to the extent feasible) the following legend:

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

                   The provisions of Section 11(a)(ii) hereof shall be operative
                   whether or not the foregoing legend is contained on any such
                   Right Certificate.

SECTION 5.  COUNTERSIGNATURE AND REGISTRATION.    The Right Certificates shall
            be executed on behalf of the Company by its Chairman of the Board,
            its Chief Executive Officer, its President, its Vice Chairman of the
            Board, its Chief Financial Officer, or any of its Vice Presidents,
            either manually or by facsimile signature, shall have affixed
            thereto the Company's seal or a facsimile thereof, and shall be
            attested by the Secretary or an Assistant Secretary of the Company,
            either manually or by facsimile signature. The Right Certificates
            shall be manually countersigned by 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 Right Certificates
            shall cease to be such officer of the Company before
            countersignature by the Rights Agent and issuance and delivery by
            the Company, such Right Certificates, nevertheless, may be
            countersigned by the Rights Agent and issued and delivered by the
            Company with the same force and effect as though the person who
            signed such Right Certificates had not ceased to be such officer of
            the Company; and any Right Certificate may be signed on behalf of
            the Company by any person who, at the actual date of the execution
            of such Right Certificate, shall

                                       8
<PAGE>
 
            be a proper officer of the Company to sign such Right Certificate,
            although at the date of the execution of this Agreement any such
            person was not such an officer.

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

SECTION 6.  TRANSFER, SPLIT UP, COMBINATION AND EXCHANGE OF RIGHT CERTIFICATES;
            MUTILATED, DESTROYED, LOST OR STOLEN RIGHT CERTIFICATES. Subject to
            the provisions of Section 11(a)(ii), Section 14 and Section 24
            hereof, at any time after the Close of Business on the Distribution
            Date, and at or prior to the Close of Business on the earlier of the
            Redemption Date or the Final Expiration Date, any Right Certificate
            or Right Certificates may be transferred, split up, combined or
            exchanged for another Right Certificate or Right Certificates,
            entitling the registered holder to purchase a like number of one 
            one-hundredths of a Preferred Share as the Right Certificate or
            Right Certificates surrendered then entitled such holder to
            purchase. Any registered holder desiring to transfer, split up,
            combine or exchange any Right Certificate or Right Certificates
            shall make such request in writing delivered to the Rights Agent,
            and shall surrender the Right Certificate or Right 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 Right
            Certificate until the registered holder shall have completed and
            signed the certificate contained in the form of assignment on the
            reverse side of such Right Certificate and shall have provided such
            additional evidence of the identity of the Beneficial Owner (or
            former Beneficial Owner) or Affiliates or Associates thereof as the
            Company shall reasonably request. Thereupon the Rights Agent shall,
            subject to Section 11(a)(ii), Section 14 and Section 24 hereof,
            countersign and deliver to the person entitled thereto a Right
            Certificate or Right Certificates, as the case may be, as so
            requested. The Company may require payment of a sum sufficient to
            cover any tax or governmental charge that may be imposed in
            connection with any transfer, split up, combination or exchange of
            Right Certificates.

            Upon receipt by the Company and the Rights Agent of evidence
            reasonably satisfactory to them of the loss, theft, destruction or
            mutilation of a Right Certificate, and, in case of loss, theft or
            destruction, of indemnity or security reasonably satisfactory to
            them, and, at the Company's 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 Right
            Certificate if mutilated, the Company will issue, execute and
            deliver a new Right Certificate of like tenor to the Rights Agent
            for countersignature and delivery to the registered holder in lieu
            of the Right Certificate so lost, stolen, destroyed or mutilated.

                                       9
<PAGE>
 
            Notwithstanding any other provisions hereof, the Company and the
            Rights Agent may amend this Rights Agreement to provide for
            uncertificated Rights in addition to or in place of Rights evidenced
            by Rights Certificates.

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

            (a)    The registered holder of any Right Certificate may exercise 
                   the Rights evidenced thereby (except as otherwise provided
                   herein) in whole or in part at any time after the
                   Distribution Date upon surrender of the Right Certificate,
                   with the form of election to purchase on the reverse side
                   thereof duly executed, to the Rights Agent at the office of
                   the Rights Agent designated for such purpose, together with
                   payment of the Purchase Price for each one one-hundredth of a
                   Preferred Share (or such other number of shares or other
                   securities) as to which the Rights are exercised, at or prior
                   to the earliest of (i) the Close of Business on October 7,
                   2008 (the "Final Expiration Date"), (ii) the time at which
                   the Rights are redeemed as provided in Section 23 hereof (the
                   "Redemption Date"), or (iii) the time at which such Rights
                   are exchanged as provided in Section 24 hereof.

            (b)    The purchase price (the "Purchase Price") for each one 
                   one-hundredth of a Preferred Share pursuant to the exercise
                   of a Right shall initially be $187.50 and shall be subject to
                   adjustment from time to time as provided in Sections 11 and
                   13 hereof and shall be payable in lawful money of the United
                   States of America in accordance with paragraph (c) below.

            (c)    Upon receipt of a Right Certificate representing exercisable
                   Rights, with the form of election to purchase duly executed,
                   accompanied by payment of the Purchase Price for the shares
                   to be purchased and an amount equal to any applicable
                   transfer tax required to be paid by the holder of such Right
                   Certificate in accordance with Section 9 hereof by certified
                   check, cashier's check, bank draft or money order payable to
                   the order of the Company, the Rights Agent shall thereupon
                   promptly (i) (A) requisition from any transfer agent for the
                   Preferred Shares certificates for the number of Preferred
                   Shares to be purchased and the Company hereby irrevocably
                   authorizes its transfer agent to comply with all such
                   requests, or (B) if the Company, in its sole discretion,
                   shall have elected to deposit the Preferred Shares issuable
                   upon exercise of the Rights hereunder into a depository,
                   requisition from the depositary agent depositary receipts
                   representing such number of one one-hundredths of a Preferred
                   Share as are to be purchased (in which case certificates for
                   the Preferred Shares represented by such receipts shall be
                   deposited by the transfer agent with the depositary agent)
                   and the Company hereby directs the depositary agent to comply
                   with such request, (ii) when appropriate, requisition from
                   the Company the amount of cash to be paid in lieu of issuance
                   of fractional shares in accordance with Section 14 hereof,
                   (iii) after receipt of such certificates or depositary

                                       10
<PAGE>
 
                   receipts, cause the same to be delivered to or upon the order
                   of the registered holder of such Right Certificate,
                   registered in such name or names as may be designated by such
                   holder and (iv) when appropriate, after receipt, deliver such
                   cash to or upon the order of the registered holder of such
                   Right Certificate. In the event that the Company is obligated
                   to issue securities of the Company other than Preferred
                   Shares (including Common Shares) of the Company pursuant to
                   Section 11(a) hereof, the Company will make all arrangements
                   necessary so that such other securities are available for
                   distribution by the Rights Agent, if and when appropriate.

                   In addition, in the case of an exercise of the Rights by a
                   holder pursuant to Section 11(a)(ii) hereof, the Rights Agent
                   shall return such Right Certificate to the registered holder
                   thereof after imprinting, stamping or otherwise indicating
                   thereon that the rights represented by such Right Certificate
                   no longer include the rights provided by Section 11(a)(ii)
                   hereof, and, if fewer than all the Rights represented by such
                   Right Certificate were so exercised, the Rights Agent shall
                   indicate on the Right Certificate the number of Rights
                   represented thereby which continue to include the rights
                   provided by Section 11(a)(ii) hereof.

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

            (e)    The Company covenants and agrees that it will cause to be 
                   reserved and kept available out of its authorized and
                   unissued Preferred Shares or any Preferred Shares held in its
                   treasury, the number of Preferred Shares that will be
                   sufficient to permit the exercise in full of all outstanding
                   Rights in accordance with this Section 7.

            (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 certification following the form of
                   election to purchase set forth on the reverse side of the
                   Rights Certificate surrendered for such exercise and (ii)
                   provided such additional evidence of the identity of the
                   Beneficial Owner (or former Beneficial Owner) or Affiliates
                   or Associates thereof as the Company shall reasonably
                   request.

SECTION 8.  CANCELLATION AND DESTRUCTION OF RIGHT CERTIFICATES.  All Right
            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

                                       11
<PAGE>
 
            to the Rights Agent for cancellation or in canceled form, or, if
            delivered or surrendered to the Rights Agent, shall be canceled by
            it, and no Right Certificates shall be issued in lieu thereof except
            as expressly permitted by any of the provisions of this Agreement.
            The Company shall deliver to the Rights Agent for cancellation and
            retirement, and the Rights Agent shall so cancel and retire, any
            other Right Certificate purchased or acquired by the Company
            otherwise than upon the exercise thereof. The Rights Agent shall
            deliver all canceled Right Certificates to the Company, or shall, at
            the written request of the Company, destroy such canceled Right
            Certificates, and in such case shall deliver a certificate of
            destruction thereof to the Company.

SECTION 9.  AVAILABILITY OF PREFERRED SHARES.  The Company covenants and
            agrees that so long as the Preferred Shares (and, after the time a
            person becomes an Acquiring Person, Common Shares or any other
            securities) issuable upon the exercise of the Rights may be listed
            on any national securities exchange or quotation system, the Company
            shall use its best efforts to cause, from and after such time as the
            Rights become exercisable, all shares reserved for such issuance to
            be listed on such exchange or quotation system upon official notice
            of issuance upon such exercise.

            The Company covenants and agrees that it will take all such action
            as may be necessary to ensure that all Preferred Shares (or Common
            Shares and other securities, as the case may be) 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 or other securities.

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

            As soon as practicable after the Shares Acquisition Date, the
            Company shall use its best efforts to:

            (i)    prepare and file a registration statement under the 
                   Securities Act of 1933, as amended (the "Act"), with respect
                   to the Rights and the securities purchasable upon exercise of
                   the Rights on an

                                       12
<PAGE>
 
                   appropriate form, will use its best efforts to cause such
                   registration statement to become effective as soon as
                   practicable after such filing and will use its best efforts
                   to cause such registration statement to remain effective
                   (with a prospectus at all times meeting the requirements of
                   the Act) until the Final Expiration Date; and

            (ii)   use its best efforts to qualify or register the Rights and 
                   the securities purchasable upon exercise of the Rights under
                   the blue sky laws of such jurisdictions as may be necessary
                   or appropriate.

SECTION 10.  PREFERRED SHARES RECORD DATE.  Each person in whose name any
             certificate for Preferred Shares or other securities is issued upon
             the exercise of Rights shall for all purposes be deemed to have
             become the holder of record of the Preferred Shares or other
             securities represented thereby on, and such certificate shall be
             dated, the date upon which the Right Certificate evidencing such
             Rights was duly surrendered with the forms of election and
             certification duly executed and payment of the Purchase Price (and
             any applicable transfer taxes) was made; provided, however, that if
             the date of such surrender and payment is a date upon which the
             Preferred Shares or other securities transfer books of the Company
             are closed, such person shall be deemed to have become the record
             holder of such shares on, and such certificate shall be dated, the
             next succeeding Business Day on which the Preferred Shares or other
             securities transfer books of the Company are open. Prior to the
             exercise of the Rights evidenced thereby, the holder of a Right
             Certificate, as such, 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.

SECTION 11.  ADJUSTMENT OF PURCHASE PRICE, NUMBER OF SHARES OR NUMBER OF RIGHTS.
             The Purchase Price, the number of Preferred Shares covered by each
             Right and the number of Rights outstanding are subject to
             adjustment from time to time as provided in this Section 11.

             (a)

                   (i)    In the event the Company shall at any time after the 
                          date of this Agreement (A) declare a dividend on the
                          Preferred Shares payable in Preferred Shares, (B)
                          subdivide the outstanding Preferred Shares, (C)
                          combine the outstanding Preferred Shares 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), except as otherwise provided
                          in this Section 11(a),

                                       13
<PAGE>
 
                          the Purchase Price in effect at the time of the record
                          date for such dividend or of the effective date of
                          such subdivision, combination or reclassification, and
                          the number and kind of shares of capital stock
                          issuable on such date, shall be proportionately
                          adjusted so that the holder of any Right exercised
                          after such time shall be entitled to receive the
                          aggregate number and kind of shares of capital stock
                          which, if such Right had been exercised immediately
                          prior to such date and at a time when the Preferred
                          Shares transfer books of the Company were open, such
                          holder would have owned upon such exercise and been
                          entitled to receive by virtue of such dividend,
                          subdivision, combination or reclassification;
                          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 one Right. If an event occurs which would
                          require an adjustment under both Section 11(a)(i) and
                          Section 11(a)(ii) hereof, the adjustment provided for
                          in this Section 11(a)(i) shall be in addition to, and
                          shall be made prior to any adjustment required
                          pursuant to Section 11(a)(ii) hereof.

                   (ii)   Subject to Section 24 hereof and the provisions of 
                          the next paragraph of this Section 11(a)(ii), in the
                          event any Person shall become an Acquiring Person,
                          each holder of a Right shall, for a period of 60 days
                          after the later of such time any Person becomes an
                          Acquiring Person or the effective date of an
                          appropriate registration statement under the Act
                          pursuant to Section 9 hereof (provided, however that,
                          if at any time prior to the expiration or termination
                          of the Rights there shall be a temporary restraining
                          order, a preliminary injunction, an injunction, or
                          temporary suspension by the Board of Directors, or
                          similar obstacle to exercise of the Rights (the
                          "Injunction") which prevents exercise of the Rights, a
                          new 60-day period shall commence on the date the
                          Injunction is removed), have a right to receive, upon
                          exercise thereof at a price equal to the then current
                          Purchase Price multiplied by the number of one one-
                          hundredths of a Preferred Share for which a Right is
                          then exercisable, in accordance with the terms of this
                          Agreement and in lieu of Preferred Shares, such number
                          of Common Shares as shall equal the result obtained by
                          (A) multiplying the then current Purchase Price by the
                          number of one one-hundredths of a Preferred Share for
                          which a Right is then exercisable and dividing that
                          product by (B) 50% of the then current per share
                          market price of the Common Shares (determined pursuant
                          to Section 11(d) hereof) on the date such Person
                          became an Acquiring Person; provided, however, that if
                          the transaction that would otherwise give rise to the
                          foregoing adjustment is also subject to the provisions
                          of Section 13 hereof, then only the

                                       14
<PAGE>
 
                          provisions of Section 13 hereof shall apply and no
                          adjustment shall be made pursuant to this Section
                          11(a)(ii). In the event that any Person shall become
                          an Acquiring Person and the Rights shall then be
                          outstanding, the Company shall not take any action
                          which would eliminate or diminish the benefits
                          intended to be afforded by the Rights.

                          Notwithstanding anything in this Agreement to the
                          contrary, from and after the time any Person becomes
                          an Acquiring Person, any Rights beneficially owned by
                          (i) such Acquiring Person or an Associate or Affiliate
                          of such Acquiring Person, (ii) a transferee of such
                          Acquiring Person (or of any such Associate or
                          Affiliate) who becomes a transferee after the
                          Acquiring Person became such, or (iii) a transferee of
                          such Acquiring Person (or of any such Associate or
                          Affiliate) who becomes a transferee prior to or
                          concurrently with the Acquiring Person's becoming such
                          and receives such Rights pursuant to either (A) a
                          transfer (whether or not for consideration) from the
                          Acquiring Person to holders of equity interests in
                          such Acquiring Person or to any Person with whom the
                          Acquiring Person has any continuing agreement,
                          arrangement or understanding regarding the transferred
                          Rights or (B) a transfer which the Board of Directors
                          of the Company has determined is part of a plan,
                          arrangement or understanding which has as a primary
                          purpose or effect the avoidance of this Section
                          11(a)(ii), 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
                          11(a)(ii) and Section 4(b) hereof are complied with,
                          but shall have no liability to any holder of Right
                          Certificates or other Person as a result of its
                          failure to make any determinations with respect to an
                          Acquiring Person or its Affiliates, Associates or
                          transferees hereunder. No Right Certificate shall be
                          issued at any time upon the transfer of any Rights to
                          an Acquiring Person whose Rights would be void
                          pursuant to the preceding sentence or any Associate or
                          Affiliate thereof or to any nominee of such Acquiring
                          Person, Associate or Affiliate; and any Right
                          Certificate delivered to the Rights Agent for transfer
                          to an Acquiring Person whose Rights would be void
                          pursuant to the preceding sentence shall be canceled.

                   (iii)  In lieu of issuing Common Shares in accordance with 
                          Section 11(a)(ii) hereof, the Company may, if a
                          majority of the Board of Directors then in office
                          determines that such action is necessary or
                          appropriate and not contrary to the interests of
                          holders of Rights,

                                       15
<PAGE>
 
                          elect to (and, in the event that the Board of
                          Directors has not exercised the exchange right
                          contained in Section 24(c) hereof and there are not
                          sufficient treasury shares and authorized but unissued
                          Common Shares to permit the exercise in full of the
                          Rights in accordance with the foregoing subparagraph
                          (ii), the Company shall) take all such action as may
                          be necessary to authorize, issue or pay, upon the
                          exercise of the Rights, cash (including by way of a
                          reduction of the Purchase Price), property, Common
                          Shares, other securities or any combination thereof
                          having an aggregate value equal to the value of the
                          Common Shares which otherwise would have been issuable
                          pursuant to Section 11(a)(ii) hereof, which aggregate
                          value shall be determined by a nationally recognized
                          investment banking firm selected by a majority of the
                          Board of Directors then in office. For purposes of the
                          preceding sentence, the value of the Common Shares
                          shall be determined pursuant to Section 11(d) hereof.
                          Any such election by the Board of Directors must be
                          made within 60 days following the date on which the
                          event described in Section 11(a)(ii) hereof shall have
                          occurred. Following the occurrence of the event
                          described in Section 11(a)(ii) hereof, a majority of
                          the Board of Directors then in office may suspend the
                          exercisability of the Rights for a period of up to 60
                          days following the date on which the event described
                          in Section 11(a)(ii) hereof shall have occurred to the
                          extent that such directors have not determined whether
                          to exercise their rights of election under this
                          Section 11(a)(iii). In the event of any such
                          suspension, the Company shall issue a public
                          announcement stating that the exercisability of the
                          Rights has been temporarily suspended.

            (b)    In case the Company shall fix a record date for the issuance
                   of rights, options or warrants to all holders of Preferred
                   Shares entitling them (for a period expiring within 45
                   calendar days after such record date) to subscribe for or
                   purchase Preferred Shares (or shares having the same
                   designations and the powers, preferences and rights, and the
                   qualifications, limitations and restrictions as the Preferred
                   Shares ("equivalent preferred shares")) or securities
                   convertible into Preferred Shares or equivalent preferred
                   shares at a price per Preferred Share or equivalent preferred
                   share (or having a conversion price per share, if a security
                   convertible into Preferred Shares or equivalent preferred
                   shares) less than the then current per share market price of
                   the Preferred Shares (as such term is hereinafter defined) on
                   such record date, the Purchase Price to be in effect after
                   such record date shall be determined by multiplying the
                   Purchase Price in effect immediately prior to such record
                   date by a fraction, the numerator of which shall be the
                   number of Preferred Shares outstanding on such record date
                   plus the number of Preferred Shares which the aggregate
                   offering price of the total number of Preferred Shares and/or
                   equivalent preferred

                                       16
<PAGE>
 
                   shares 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 Preferred Shares
                   outstanding on such record date plus the number of additional
                   Preferred Shares and/or equivalent preferred shares to be
                   offered for subscription or purchase (or into which the
                   convertible securities so to be offered are initially
                   convertible); 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 one Right. In
                   case such subscription price may be paid in a consideration
                   part or all of which shall be in a form other than cash, the
                   value of such consideration shall be as determined in good
                   faith by the Board of Directors of the Company, whose
                   determination shall be described in a statement filed with
                   the Rights Agent. Preferred Shares owned by or held for the
                   account of the Company shall not be deemed outstanding for
                   the purpose of any such computation. Such adjustment shall be
                   made 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.

            (c)    In case the Company shall fix a record date for the making 
                   of a distribution to all holders of the Preferred 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 or a dividend payable in Preferred Shares) or
                   subscription rights or warrants (excluding those referred to
                   in Section 11(b) hereof), the Purchase Price to be in effect
                   after such record date shall be determined by multiplying the
                   Purchase Price in effect immediately prior to such record
                   date by a fraction, the numerator of which shall be the then
                   current per share market price of the Preferred Shares (as
                   such term is hereinafter defined) on such record date, less
                   the fair market value (as determined in good faith by the
                   Board of Directors of the Company, whose determination shall
                   be described in a statement filed with the Rights Agent) of
                   the portion of the assets or evidences of indebtedness so to
                   be distributed or of such subscription rights or warrants
                   applicable to one Preferred Share and the denominator of
                   which shall be such current per share market price of the
                   Preferred Shares; provided, however, that in no event shall
                   the consideration to be paid upon the exercise of one Right
                   be less than the aggregate par value of the shares of capital
                   stock of the Company to be issued upon exercise of one Right.
                   Such adjustments shall be made successively whenever such a
                   record date is fixed; and in the event that such distribution
                   is not so made, the Purchase Price shall again be adjusted to
                   be the Purchase Price which would then be in effect if such
                   record date had not been fixed.

                                       17
<PAGE>
 
            (d)
                   (i)    For the purpose of any computation hereunder, the 
                          "current per share market price" of any security (a
                          "Security" for the purpose of this Section 11(d)(i))
                          on any date shall be deemed to be the average of the
                          daily closing prices per share of such Security for
                          the 30 consecutive Trading Days (as such term is
                          hereinafter defined) 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 (A) a dividend or
                          distribution on such Security payable in shares of
                          such Security or securities convertible into such
                          shares, or (B) any subdivision, combination or
                          reclassification of such Security or securities
                          convertible into such shares, or (C) any subdivision,
                          combination or reclassification of such Security and
                          prior to the expiration of 30 Trading Days after the
                          ex-dividend date for such dividend or distribution, or
                          the record date for such subdivision, combination or
                          reclassification, then, and in each such case, the
                          current per share market price shall be appropriately
                          adjusted to reflect the current market price per share
                          equivalent of such Security. The closing price for
                          each day shall be the last sale price, regular way,
                          or, in case no such sale takes place on such day, the
                          average of the closing bid and asked prices, regular
                          way, in either case as reported in the principal
                          consolidated transaction reporting 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 as
                          reported on the Nasdaq National Market or, if the
                          Security is not listed or admitted to trading on any
                          national securities exchange or reported on the Nasdaq
                          National Market, the last quoted price or, if not so
                          quoted, the average of the high bid and low asked
                          prices in the over-the-counter market, as reported by
                          the National Association of Securities Dealers, Inc.
                          Automated Quotations System ("Nasdaq") or such other
                          system then in use, or, if on any such date the
                          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 or, if on any such date no
                          professional market maker is making a market in the
                          Security, the price as determined in good faith by the
                          Board of Directors. 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

                                       18
<PAGE>
 
                          transaction of business or, if the Security is not
                          listed or admitted to trading on any national
                          securities exchange, a Business Day.

                   (ii)   For the purpose of any computation hereunder, the 
                          "current per share market price" of the Preferred
                          Shares shall be determined in accordance with the
                          method set forth in Section 11(d)(i) hereof. If the
                          Preferred Shares are not publicly traded, the "current
                          per share market price" of the Preferred Shares shall
                          be conclusively deemed to be the current per share
                          market price of the Common Shares as determined
                          pursuant to Section 11(d)(i) hereof (appropriately
                          adjusted to reflect any stock split, stock dividend or
                          similar transaction occurring after the date hereof)
                          multiplied by one hundred. If neither the Common
                          Shares nor the Preferred Shares are publicly held or
                          so listed or traded, "current per share market price"
                          shall mean the fair value per share as 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.

            (e)    No adjustment in the Purchase Price shall be required unless
                   such adjustment would require an increase or decrease of at
                   least 1% in the Purchase Price; provided, 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 one one-hundredth of a Preferred Share or one ten-
                   thousandth of any other share or security as the case may be.
                   Notwithstanding the first sentence of this Section 11(e), any
                   adjustment required by this Section 11 shall be made no later
                   than the earlier of (i) three years from the date of the
                   transaction which requires such adjustment or (ii) the date
                   of the expiration of the right to exercise any Rights.

            (f)    If as a result of an adjustment made pursuant to Section 
                   11(a) hereof, the holder of any Right thereafter exercised
                   shall become entitled to receive any shares of capital stock
                   of the Company other than Preferred Shares, thereafter the
                   number of such other shares so receivable upon exercise of
                   any Right shall be subject to adjustment from time to time in
                   a manner and on terms as nearly equivalent as practicable to
                   the provisions with respect to the Preferred Shares contained
                   in Sections 11(a) through 11(c) hereof, inclusive, and the
                   provisions of Sections 7, 9, 10, 13 and 14 hereof 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 one-hundredths of a

                                       19
<PAGE>
 
                   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) hereof, upon each adjustment of the
                   Purchase Price as a result of the calculations made in
                   Section 11(b) and Section 11(c) hereof, each Right
                   outstanding immediately prior to the making of such
                   adjustment shall thereafter evidence the right to purchase,
                   at the adjusted Purchase Price, that number of one one-
                   hundredths of a Preferred Share (calculated to the nearest
                   one one-millionth of a Preferred Share) obtained by (i)
                   multiplying (x) the number of one one-hundredths of a
                   Preferred Share covered by a Right immediately prior to this
                   adjustment by (y) the Purchase Price in effect immediately
                   prior to such adjustment of the Purchase Price and (ii)
                   dividing the product so obtained by the Purchase Price in
                   effect immediately after such adjustment of the Purchase
                   Price.

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

                                       20
<PAGE>
 
                   the names of the holders of record of Right Certificates on
                   the record date specified in the public announcement.

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

            (k)    Before taking any action that would cause an adjustment 
                   reducing the Purchase Price below one one-hundredth of the
                   then par value, if any, of the Preferred Shares issuable upon
                   exercise of the Rights, the Company shall take any corporate
                   action which may, in the opinion of its counsel, be necessary
                   in order that the Company may validly and legally issue fully
                   paid and nonassessable Preferred Shares at such adjusted
                   Purchase Price.

            (l)    In any case in which this Section 11 shall require that an 
                   adjustment in the Purchase Price be made 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
                   Preferred Shares and other capital stock or securities of the
                   Company, if any, issuable upon such exercise on the basis of
                   the Purchase Price in effect prior to such adjustment;
                   provided, however, that the Company shall deliver to such
                   holder a due bill or other appropriate instrument evidencing
                   such holder's right to receive such additional shares upon
                   the occurrence of the event requiring such adjustment.

            (m)    The Company covenants and agrees that, after the 
                   Distribution Date, it will not, except as permitted by
                   Section 23 or Section 27 hereof, take (or permit any
                   Subsidiary to take) any action the purpose of which is to, or
                   if at the time such action is taken it is reasonably
                   foreseeable that the effect of such action is to, materially
                   diminish or eliminate the benefits intended to be afforded by
                   the Rights. Any such action taken by the Company during any
                   period after any Person becomes an Acquiring Person but prior
                   to the Distribution Date shall be null and void unless such
                   action could be taken under this Section 11(m) from and after
                   the Distribution Date.

            (n)    Anything in this Section 11 to the contrary notwithstanding, 
                   the Company shall be entitled to make such reductions in the
                   Purchase Price, in addition to those adjustments expressly
                   required by this Section 11, as and to the extent that it in
                   its sole discretion shall determine to be advisable in order
                   that any consolidation or subdivision of the Preferred
                   Shares, issuance wholly for cash of any Preferred Shares at
                   less than the current market price, issuance wholly for cash
                   of Preferred Shares or securities which by their terms are
                   convertible into or exchangeable for Preferred Shares,

                                       21
<PAGE>
 
                   dividends on Preferred Shares payable in Preferred Shares or
                   issuance of rights, options or warrants referred to
                   hereinabove in Section 11(b), hereafter made by the Company
                   to holders of its Preferred Shares shall not be taxable to
                   such stockholders.

(o)  In the event that at any time after the date of this Agreement and prior to
     the Distribution Date, the Company shall (i) declare or pay any dividend on
     the Common Shares payable in Common Shares or (ii) effect a subdivision,
     combination or consolidation of the Common Shares (by reclassification or
     otherwise than by payment of dividends in Common Shares) into a greater or
     lesser number of Common Shares, then in any such case (A) the number of one
     one-hundredths of a Preferred Share purchasable after such event upon
     proper exercise of each Right shall be determined by multiplying the number
     of one one-hundredths of a Preferred Share so purchasable immediately prior
     to such event by a fraction, the numerator of which is the number of Common
     Shares outstanding immediately before such event and the denominator of
     which is the number of Common Shares outstanding immediately after such
     event, and (B) each Common Share outstanding immediately after such event
     shall have issued with respect to it that number of Rights which each
     Common Share outstanding immediately prior to such event had issued with
     respect to it.  The adjustments provided for in this Section 11(o) shall be
     made successively whenever such a dividend is declared or paid or such a
     subdivision, combination or consolidation is effected.

(p)  The exercise of Rights under Section 11(a)(ii) hereof shall only result in
     the loss of rights under Section 11(a)(ii) hereof to the extent so
     exercised and shall not otherwise affect the rights represented by the
     Rights under this Agreement, including the rights represented by Section 13
     hereof.

SECTION 12.  CERTIFICATE OF ADJUSTED PURCHASE PRICE OR NUMBER OF SHARES.
             Whenever an adjustment is made as provided in Sections 11 and 13
             hereof, 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 Common Shares or the Preferred
             Shares a copy of such certificate and (c) mail a brief summary
             thereof to each holder of a Right Certificate in accordance with
             Section 25 hereof. The Rights Agent shall be fully protected in
             relying on any such certificate and on any adjustment therein
             contained and shall not be deemed to have knowledge of any
             adjustment unless and until it shall have received such
             certificate.

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

             (a)   In the event that, following the Shares Acquisition Date or,
                   if a Transaction is proposed, the Distribution Date, directly
                   or indirectly (x) the Company shall consolidate with, or
                   merge with and into, any

                                       22
<PAGE>
 
                   Interested Stockholder, or if in such merger or consolidation
                   all holders of Common Stock are not treated alike, any other
                   Person, (y) any Interested Person, or if in such merger or
                   consolidation all holders of Common Stock are not treated
                   alike, any other Person shall consolidate with the Company,
                   or merge with and into the Company, and the Company shall be
                   the continuing or surviving corporation of such merger (other
                   than, in the case of either transaction described in (x) or
                   (y), a merger or consolidation which would result in all of
                   the voting power represented by the securities of the Company
                   outstanding immediately prior thereto continuing to represent
                   (either by remaining outstanding or by being converted into
                   securities of the surviving entity) all of the voting power
                   represented by the securities of the Company or such
                   surviving entity outstanding immediately after such merger or
                   consolidation and the holders of such securities not having
                   changed as a result of such merger or consolidation), or (z)
                   the Company shall sell, mortgage or otherwise transfer (or
                   one or more of its subsidiaries shall sell, mortgage or
                   otherwise transfer), in one or more transactions, assets or
                   earning power aggregating more than 50% of the assets or
                   earning power of the Company and its subsidiaries (taken as a
                   whole) to any Interested Stockholder or Stockholders, or if
                   in such transaction all holders of Common Stock are not
                   treated alike, any other Person, (other than the Company or
                   any Subsidiary of the Company in one or more transactions
                   each of which individually and the aggregate does not violate
                   Section 13(d) hereof) then, and in each such case, proper
                   provision shall be made so that (i) each holder of a Right,
                   subject to Section 11(a)(ii) hereof, shall have the right to
                   receive, upon the exercise thereof at a price equal to the
                   then current Purchase Price multiplied by the number of one
                   one-hundredths of a Preferred Share for which a Right is then
                   exercisable in accordance with the terms of this Agreement
                   and in lieu of Preferred Shares, such number of freely
                   tradable Common Shares of the Principal Party (as such term
                   is hereinafter defined), free and clear of liens, rights of
                   call or first refusal, encumbrances or other adverse claims,
                   as shall be equal to the result obtained by (A) multiplying
                   the then current Purchase Price by the number of one one-
                   hundredths of a Preferred Share for which a Right is then
                   exercisable (without taking into account any adjustment
                   previously made pursuant to Section 11(a)(ii) hereof) and
                   dividing that product by (B) 50% of the then current per
                   share market price of the Common Shares of such Principal
                   Party (determined pursuant to Section 11(d) hereof) on the
                   date of consummation of such consolidation, merger, sale or
                   transfer; (ii) such Principal Party shall thereafter be
                   liable for, and shall assume, by virtue of such
                   consolidation, merger, sale or transfer, all the obligations
                   and duties of the Company pursuant to this Agreement; (iii)
                   the term "Company" shall thereafter be deemed to refer to
                   such Principal Party, it being specifically intended that the
                   provisions of Section 11 hereof shall apply to such Principal
                   Party; and (iv) such Principal Party shall take such steps
                   (including, but not limited to, the reservation of a
                   sufficient number of shares of its Common Shares

                                       23
<PAGE>
 
                   in accordance with Section 9 hereof) in connection with such
                   consummation as may be necessary to assure that the
                   provisions hereof 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:

                   (i)    in the case of any transaction described in clause 
                          (x) or (y) of the first sentence of Section 13(a)
                          hereof, the Person that is the issuer of any
                          securities into which Common Shares are converted in
                          such merger or consolidation, and if no securities are
                          so issued, the Person that is the other party to the
                          merger or consolidation (or, if applicable, the
                          Company, if it is the surviving corporation); and

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

                   provided, however, that in any case, (1) if the Common 
                   Shares of such Person are not at such time and have not been
                   continuously over the preceding 12-month period registered
                   under Section 12 of the Exchange Act, and such Person is a
                   direct or indirect subsidiary or Affiliate of another Person
                   the Common Shares of which are and have been so registered,
                   "Principal Party" shall refer to such other Person; (2) if
                   such Person is a subsidiary, directly or indirectly, or
                   Affiliate of more than one Person, the Common Shares of two
                   or more of which are and have been so registered, "Principal
                   Party" shall refer to whichever of such Persons is the issuer
                   of the Common Shares having the greatest aggregate market
                   value; and (3) if such Person is owned, directly or
                   indirectly, by a joint venture formed by two or more Persons
                   that are not owned, directly or indirectly, by the same
                   Person, the rules set forth in (1) and (2) above shall apply
                   to each of the chains of ownership having an interest in such
                   joint venture as if such party were a "subsidiary" of both or
                   all of such joint venturers and the Principal Parties in each
                   such chain shall bear the obligations set forth in this
                   Section 13 in the same ratio as their direct or indirect
                   interests in such Person bear to the total of such interests.

            (c)    The Company shall not consummate any such consolidation, 
                   merger, sale or transfer 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 each
                   Principal Party and each other Person who may become a
                   Principal Party as a result of such consolidation, merger,
                   sale or transfer shall have (i) executed and

                                       24
<PAGE>
 
                   delivered to the Rights Agent a supplemental agreement
                   providing for the terms set forth in paragraphs (a) and (b)
                   of this Section 13 and (ii) prepared, filed and had declared
                   and remain effective a registration statement under the Act
                   on the appropriate form with respect to the Rights and the
                   securities exercisable upon exercise of the Rights and
                   further providing that, as soon as practicable after the date
                   of any consolidation, merger, sale or transfer of assets
                   mentioned in paragraph (a) of this Section 13, the Principal
                   Party at its own expense will:

                   (i)    cause the registration statement under the Act with 
                          respect to the Rights and the securities purchasable
                          upon exercise of the Rights on an appropriate form to
                          remain effective (with a prospectus at all times
                          meeting the requirements of the Act) until the Final
                          Expiration Date;

                   (ii)   use its best efforts to qualify or register the 
                          Rights and the securities purchasable upon exercise of
                          the Rights under the blue sky laws of such
                          jurisdictions as may be necessary or appropriate;

                   (iii)  list the Rights and the securities purchasable upon 
                          exercise of the Rights on each national securities
                          exchange on which the Common Shares were listed prior
                          to the consummation of the Business Combination or on
                          the Nasdaq National Market if the Common Shares were
                          listed on the Nasdaq National Market or, if the Common
                          Shares were not listed on a national securities
                          exchange or the Nasdaq National Market prior to the
                          consummation of the Business Combination, on a
                          national securities exchange or the Nasdaq National
                          Market; and

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

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

            (d)    After the Distribution Date, the Company covenants and 
                   agrees that it shall not (i) consolidate with, (ii) merge
                   with or into, or (iii) sell or transfer to, in one or more
                   transactions, assets or earning power aggregating more than
                   50% of the assets or earning power of the Company and its
                   subsidiaries taken as a whole, any other Person (other than a
                   Subsidiary of the Company in a transaction which does not
                   violate Section 11(m) hereof), if (x) at the time of or after
                   such consolidation, merger or sale there are any charter or
                   bylaw provisions or any rights, warrants or other instruments
                   or securities outstanding, agreements in effect or any other
                   action taken which would diminish or otherwise eliminate the
                   benefits

                                       25
<PAGE>
 
                   intended to be afforded by the Rights or (y) prior to,
                   simultaneously with or immediately after such consolidation,
                   merger or sale, the stockholders of the Person who
                   constitutes, or would constitute, the "Principal Party" for
                   purposes of Section 13(a) hereof shall have received a
                   distribution of Rights previously owned by such Person or any
                   of its Affiliates and Associates. The Company shall not
                   consummate any such consolidation, merger, sale or transfer
                   unless prior thereto the Company and such other Person shall
                   have executed and delivered to the Rights Agent a
                   supplemental agreement evidencing compliance with this
                   Section 13(d).

SECTION 14.  FRACTIONAL RIGHTS AND FRACTIONAL SHARES.

             (a)   The Company shall not be required to issue fractions of 
                   Rights or to distribute Right Certificates which evidence
                   fractional Rights. In lieu of such fractional Rights, there
                   shall be paid to the registered holders of the Right
                   Certificates with regard to which such fractional Rights
                   would otherwise be issuable, an amount in cash equal to the
                   same fraction of the current market value of a whole Right.
                   For the purposes of this Section 14(a), the current market
                   value of a whole Right shall be the closing price of the
                   Rights for the Trading Day immediately prior to the date on
                   which such fractional Rights would have been otherwise
                   issuable. The closing price for any day shall be the last
                   sale price, regular way, or, in case no such sale takes place
                   on such day, the average of the closing bid and asked prices,
                   regular way, in either case as reported in the principal
                   consolidated transaction reporting system with respect to
                   securities listed or admitted to trading on the New York
                   Stock Exchange or, if the Rights are not listed or admitted
                   to trading on the New York Stock Exchange, as reported in the
                   principal consolidated transaction reporting system with
                   respect to securities listed on the principal national
                   securities exchange on which the Rights are listed or
                   admitted to trading or as reported on the Nasdaq National
                   Market or, if the Rights are not listed or admitted to
                   trading on any national securities exchange or reported on
                   the Nasdaq National Market, the last quoted price or, if not
                   so quoted, the average of the high bid and low asked prices
                   in the over-the-counter market, as reported by Nasdaq or such
                   other system then in use or, if on any such date the Rights
                   are not quoted by any such organization, the average of the
                   closing bid and asked prices as furnished by a professional
                   market maker making a market in the Rights selected by the
                   Board of Directors of the Company. If on any such date no
                   such market maker is making a market in the Rights, the fair
                   value of the Rights on such date as determined in good faith
                   by the Board of Directors of the Company shall be used.

            (b)    The Company shall not be required to issue fractions of 
                   Preferred Shares (other than fractions which are integral
                   multiples of one one-hundredth of a Preferred Share) upon
                   exercise of the Rights or to distribute certificates which
                   evidence fractional Preferred Shares (other than fractions
                   which are

                                       26
<PAGE>
 
                   integral multiples of one one-hundredth of a Preferred
                   Share). Fractions of Preferred Shares in integral multiples
                   of one one-hundredth of a Preferred Share may, at the
                   election of the Company, be evidenced by depositary receipts;
                   provided, however, that holders of such depositary receipts
                   shall have all of the designations and the powers,
                   preferences and rights, and the qualifications, limitations
                   and restrictions to which they are entitled as beneficial
                   owners of the Preferred Shares represented by such depositary
                   receipts. In lieu of fractional Preferred Shares that are not
                   integral multiples of one one-hundredth of a Preferred Share,
                   the Company shall pay to the registered holders of Right
                   Certificates at the time such Rights are exercised as herein
                   provided an amount in cash equal to the same fraction of the
                   current market value of one Preferred Share. For the purposes
                   of this Section 14(b), the current market value of a
                   Preferred Share shall be the current per share market price
                   of the Preferred Shares (as determined pursuant to the second
                   sentence of Section 11(d)(i) hereof) for the Trading Day
                   immediately prior to the date of such exercise (or, if not
                   publicly traded, in accordance with Section 11(d)(ii)
                   hereof).

            (c)    Following the occurrence of one of the transactions or 
                   events specified in Section 11 hereof giving rise to the
                   right to receive Common Shares, capital stock equivalents
                   (other than Preferred Shares) or other securities upon the
                   exercise of a Right, the Company shall not be required to
                   issue fractions of Common Shares or units of such Common
                   Shares, capital stock equivalents or other securities upon
                   exercise of the Rights or to distribute certificates which
                   evidence fractional Common Shares, capital stock equivalents
                   or other securities. In lieu of fractional Common Shares,
                   capital stock equivalents or other securities, the Company
                   shall pay to the registered holders of Right Certificates at
                   the time such Rights are exercised as herein provided an
                   amount in cash equal to the same fraction of the current
                   market value of one Common Share or unit of such Common
                   Shares, capital stock equivalents or other securities. For
                   purposes of this Section 14(c), the current market value
                   shall be the current per share market price (as determined
                   pursuant to Section 11(d)(i) hereof) for the Trading Day
                   immediately prior to the date of such exercise and, if such
                   capital stock equivalent is not traded, each such capital
                   stock equivalent shall have the value of one one-hundredth of
                   a Preferred Share.

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

SECTION 15.  RIGHTS OF ACTION.  All rights of action in respect of this
             Agreement, excepting the rights of action given to the Rights Agent
             under Sections 18 and 20 hereof, are vested in the respective
             registered holders of the Right Certificates (and, prior to the
             Distribution Date, the registered holders of the Common Shares) and
             any registered holder of any Right Certificate (or, prior to the
             Distribution Date, of the

                                       27
<PAGE>
 
             Common Shares), without the consent of the Rights Agent or of the
             holder of any other Right Certificate (or, prior to the
             Distribution Date, of the Common Shares), may, in his own behalf
             and for his own benefit, enforce, and may institute and maintain
             any suit, action or proceeding against the Company to enforce, or
             otherwise act in respect of, his right to exercise the Rights
             evidenced by such Right Certificate in the manner provided in such
             Right Certificate and in this Agreement. Without limiting the
             foregoing or any remedies available to the holders of Rights, it is
             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. Holders of
             Rights shall be entitled to recover the reasonable costs and
             expenses, including attorneys fees, incurred by them in any action
             to enforce the provisions of this Agreement.

SECTION 16.  AGREEMENT OF RIGHT 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 Right Certificates are 
                   transferable (subject to the provisions of this Rights
                   Agreement) only on the registry books of the Rights Agent if
                   surrendered at the principal office of the Rights Agent, duly
                   endorsed or accompanied by a proper instrument of transfer;
                   and

            (c)    the Company and the Rights Agent may deem and treat the 
                   person in whose name the Right Certificate (or, prior to the
                   Distribution Date, the associated Common Shares certificate)
                   is registered as the absolute owner thereof and of the Rights
                   evidenced thereby (notwithstanding any notations of ownership
                   or writing on the Right 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.

SECTION 17.  RIGHT CERTIFICATE HOLDER NOT DEEMED A STOCKHOLDER.  No holder, as
             such, of any Right Certificate shall be entitled to vote, receive
             dividends or be deemed for any purpose the holder of the Preferred
             Shares or any other securities of the Company which may at any time
             be issuable on the exercise of the Rights represented thereby, nor
             shall anything contained herein or in any Right Certificate be
             construed to confer upon the holder of any Right Certificate, as
             such, any of the rights of a stockholder of the Company or any
             right to vote for the election of directors or upon any matter
             submitted to stockholders at any meeting thereof, or to give or
             withhold consent to any corporate action, or to

                                       28
<PAGE>
 
             receive notice of meetings or other actions affecting stockholders
             (except as provided in Section 25 hereof), or to receive dividends
             or subscription rights, or otherwise, until the Right or Rights
             evidenced by such Right Certificate shall have been exercised in
             accordance with the provisions hereof.

SECTION 18.  CONCERNING THE RIGHTS AGENT.  The Company agrees to pay to the
             Rights Agent reasonable compensation for all services rendered by
             it hereunder and, from time to time, on demand of the Rights Agent,
             its reasonable expenses and counsel fees and other disbursements
             incurred in the administration and execution of this Agreement and
             the exercise and performance of its duties hereunder. The Company
             also agrees to indemnify the Rights Agent for, and to hold it
             harmless against, any loss, liability, or expense, incurred without
             negligence, bad faith or willful misconduct on the part of the
             Rights Agent, for anything done or omitted by the Rights Agent in
             connection with the acceptance and administration of this
             Agreement, including the costs and expenses of defending against
             any claim of liability in the premises. The indemnity provided
             herein shall survive the expiration of the Rights and the
             termination of this Agreement.

             The Rights Agent shall be protected and shall incur no liability
             for, or in respect of any action taken, suffered or omitted by it
             in connection with, its administration of this Agreement in
             reliance upon any Right Certificate or certificate for the
             Preferred Shares or Common Shares or for other securities of the
             Company, instrument of assignment or transfer, power of attorney,
             endorsement, affidavit, letter, notice, direction, consent,
             certificate, statement, or other paper or document believed by it
             to be genuine and to be signed, executed and, where necessary,
             verified or acknowledged, by the proper person or persons, or
             otherwise upon the advice of counsel as set forth in Section 20
             hereof. In no case will the Rights Agent be liable for special,
             indirect, incidental or consequential or consequential loss or
             damage at any kind whatsoever (including but not limited to lost
             profits), even if the Rights Agent has been advised of such loss or
             damage.

SECTION 19.  MERGER OR CONSOLIDATION OR CHANGE OF NAME OF RIGHTS AGENT.  Any
             corporation into which the Rights Agent or any successor Rights
             Agent may be merged or with which it may be consolidated, or any
             corporation resulting from any merger or consolidation to which the
             Rights Agent or any successor Rights Agent shall be a party, or any
             corporation succeeding to the shareholder services or corporate
             trust business of the Rights Agent or any successor Rights Agent,
             shall be the successor to the Rights Agent under this Agreement
             without the execution or filing of any paper or any further act on
             the part of any of the parties hereto, provided that such
             corporation would be eligible for appointment as a successor Rights
             Agent under the provisions of Section 21 hereof. In case at the
             time such successor Rights Agent shall succeed to the agency
             created by this Agreement any of the Right Certificates shall have
             been countersigned but not delivered, any such successor Rights
             Agent may adopt the countersignature of the predecessor Rights
             Agent and deliver such Right Certificates so countersigned;

                                       29
<PAGE>
 
             and in case at that time any of the Right Certificates shall not
             have been countersigned, any successor Rights Agent may countersign
             such Right Certificates either in the name of the predecessor
             Rights Agent or in the name of the successor Rights Agent; and in
             all such cases such Right Certificates shall have the full force
             provided in the Right Certificates and in this Agreement.

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

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

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

             (b)   Whenever in the performance of its duties under this 
                   Agreement the Rights Agent shall deem it necessary or
                   desirable that any fact or matter 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, the Chief
                   Financial Officer, any Vice President, the Treasurer or the
                   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.

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

                                       30
<PAGE>
 
             (e)   The Rights Agent shall not be under any responsibility in 
                   respect of the validity of this Agreement or the execution
                   and delivery hereof (except the due execution hereof by the
                   Rights Agent) or in respect of the validity or execution of
                   any Right Certificate (except its countersignature thereof);
                   nor shall it be responsible for any breach by the Company of
                   any covenant or condition contained in this Agreement or in
                   any Right Certificate; nor shall it be responsible for any
                   change in the exercisability of the Rights (including the
                   Rights becoming void pursuant to Section 11(a)(ii) hereof) or
                   any adjustment in the terms of the Rights (including the
                   manner, method or amount thereof) provided for in Sections 3,
                   11, 13, 23 or 24 hereof, or the ascertaining of the existence
                   of facts that would require any such change or adjustment
                   (except with respect to the exercise of Rights evidenced by
                   Right Certificates after receipt of a certificate pursuant to
                   Section 12 hereof 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 Right 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, the Chief
                   Financial Officer, any Vice President, the Secretary or the
                   Treasurer of the Company, and to apply to such officers for
                   advice or instructions in connection with its duties, and it
                   shall not be liable for any action taken or suffered 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 with respect to its
                   duties or obligations under this Agreement and the date on
                   and/or after which such action shall be taken or omitted and
                   the Rights Agent shall not be liable for any action taken or
                   omitted in accordance with a proposal included in any such
                   application on or after the date specified therein (which
                   date shall not be less than three business days after the
                   date indicated in such application unless any such officer
                   shall have consented in writing to an earlier date) unless,
                   prior to taking or omitting any such action, the Rights Agent
                   has received written instructions in response to such
                   application specifying the action to be taken or omitted.

                                       31
<PAGE>
 
             (h)   The Rights Agent and any stockholder, director, officer or 
                   employee of the Rights Agent may buy, sell or deal in any of
                   the Rights or other securities of the Company or become
                   pecuniarily interested in any transaction in which the
                   Company may be interested, or contract with or lend money to
                   the Company or otherwise act as fully and freely as though it
                   were not Rights Agent under this Agreement. Nothing herein
                   shall preclude the Rights Agent from acting in any other
                   capacity for the Company or for any other legal entity.

             (i)   The Rights Agent may execute and exercise any of the rights
                   or powers hereby vested in it or perform any duty hereunder
                   either itself or by or through its attorneys or agents, and
                   the Rights Agent shall not be answerable or accountable for
                   any act, default, neglect or misconduct of any such attorneys
                   or agents or for any loss to the Company resulting from any
                   such act, default, neglect or misconduct, provided 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 Right 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 not been executed, the
                   Rights Agent shall not take any further action with respect
                   to such requested exercise of transfer without first
                   consulting with the Company.

SECTION 21.  CHANGE OF RIGHTS AGENT.  The Rights Agent or any successor Rights
             Agent may resign and be discharged from its duties under this
             Agreement upon 30 days' notice in writing mailed to the Company and
             to each transfer agent for the Common Shares or Preferred Shares by
             registered or certified mail, and to the holders of the Right
             Certificates by first-class mail. The Company may remove the Rights
             Agent or any successor Rights Agent upon 30 days' notice in
             writing, mailed to the Rights Agent or successor Rights Agent, as
             the case may be, and to each transfer agent for the Common Shares
             or Preferred Shares by registered or certified mail, and to the
             holders of the Right Certificates by first-class mail. If the
             Rights Agent shall resign or be removed or shall otherwise become
             incapable of acting, the Company shall appoint a successor to the
             Rights Agent. If the Company shall fail to make such appointment
             within a period of 30 days after giving notice of such removal or
             after it has been notified in writing of such resignation or
             incapacity by the resigning or incapacitated Rights Agent or by the
             holder of a Right Certificate (who shall, with such notice, submit
             his Right Certificate for inspection by the Company), then the
             registered holder of any

                                       32
<PAGE>
 
             Right Certificate may apply to any court of competent jurisdiction
             for the appointment of a new Rights Agent. Any successor Rights
             Agent, whether appointed by the Company or by such a court, shall
             be either (a) a corporation business trust or limited liability
             company organized and doing business under the laws of the United
             States or of any other state of the United States which is
             authorized under such laws to exercise corporate trust or stock
             transfer 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) a direct or indirect wholly owned
             subsidiary of such an entity or its wholly-owning parent. After
             appointment, the successor Rights Agent shall be vested with the
             same powers, rights, duties and responsibilities as if it had been
             originally named as Rights Agent without further act or deed; but
             the predecessor Rights Agent shall deliver and transfer to the
             successor Rights Agent any property at the time held by it
             hereunder, and execute and deliver any further assurance,
             conveyance, act or deed necessary for the purpose. Not later than
             the effective date of any such appointment the Company shall file
             notice thereof in writing with the predecessor Rights Agent and
             each transfer agent for the Common Shares or Preferred Shares, and
             mail a notice thereof in writing to the registered holders of the
             Right Certificates. Failure to give any notice provided for in this
             Section 21, however, or any defect therein, shall not affect the
             legality or validity of the resignation or removal of the Rights
             Agent or the appointment of the successor Rights Agent, as the case
             may be.

SECTION 22.  ISSUANCE OF NEW RIGHT CERTIFICATES.  Notwithstanding any of the
             provisions of this Agreement or of the Rights to the contrary, the
             Company may, at its option, issue new Right Certificates evidencing
             Rights in such form as may be approved by its Board of Directors to
             reflect any adjustment or change in the Purchase Price and the
             number or kind or class of shares or other securities or property
             purchasable under the Right 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 earlier of the Redemption Date and the Final
             Expiration Date, 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 in existence prior to the
             Distribution Date, or upon the exercise, conversion or exchange of
             securities, notes or debentures issued by the Company and in
             existence prior to the Distribution Date, and (b) may, in any other
             case, if deemed necessary or appropriate by the Board of Directors
             of the Company, issue Right Certificates representing the
             appropriate number of Rights in connection with such issuance or
             sale; provided, however, that (i) the Company shall not be
             obligated to issue any such Right Certificates if, and to the
             extent that, the Company shall be advised by counsel that such
             issuance would create a significant risk of material adverse tax
             consequences to the Company or the Person to whom such Right
             Certificate would be issued, and (ii) no Right Certificate shall be
             issued if, and to the extent that, appropriate adjustment shall
             otherwise have been made in lieu of the issuance thereof.

                                       33
<PAGE>
 
SECTION 23.  REDEMPTION.

             (a)  The Rights may be redeemed by action of the Board of 
                  Directors pursuant to Section 23(b) hereof and shall not be 
                  redeemed in any other manner.

             (b)

                   (i)    The Board of Directors of the Company may, at its 
                          option, at any time prior to the earlier of such time
                          as any Person becoming an Acquiring Person or the
                          Final Expiration Date, redeem all but not less than
                          all of the then outstanding Rights at a redemption
                          price of $0.001 per Right, appropriately adjusted to
                          reflect any stock split, stock dividend or similar
                          transaction occurring after the date hereof (such
                          redemption price being hereinafter referred to as the
                          "Redemption Price"), and the Company may, at its
                          option, pay the Redemption Price in Common Shares
                          (based on the "current per-share market price," as
                          such term is defined in Section 11(d) hereof, of the
                          Common Shares at the time of redemption), cash or any
                          other form of consideration deemed appropriate by the
                          Board of Directors. The redemption of the Rights by
                          the Board of Directors may be made effective at such
                          time, on such basis and subject to such conditions as
                          the Board of Directors in its sole discretion may
                          establish. Notwithstanding anything contained in this
                          Agreement to the contrary, the Rights shall not be
                          exercisable pursuant to Section 11(a)(ii) hereof prior
                          to the expiration or termination of the Company's
                          right of redemption under this Section 23(b)(i).

                   (ii)   In addition, the Board of Directors of the Company 
                          may, at its option, at any time after the time a
                          Person becomes an Acquiring Person and the expiration
                          of any period during which the holder of Rights may
                          exercise the rights under Section 11(a)(ii) hereof but
                          prior to any event described in clause (x), (y) or (z)
                          of the first sentence of Section 13 hereof, redeem all
                          but not less than all of the then outstanding Rights
                          at the Redemption Price (x) in connection with any
                          merger, consolidation or sale or other transfer (in
                          one transaction or in a series of related
                          transactions) of assets or earning power aggregating
                          50% or more of the assets or earning power of the
                          Company and its subsidiaries (taken as a whole) in
                          which all holders of Common Shares are treated alike
                          and not involving (other than as a holder of Common
                          Shares being treated like all other such holders) an
                          Interested Stockholder or a Transaction Person or
                          (y)(A) if and for so long as the Acquiring Person is
                          not thereafter the Beneficial Owner of 15% or more of
                          the then outstanding Common Shares, and (B) at the
                          time of redemption no other Persons are Acquiring
                          Persons.

                                       34
<PAGE>
 
             (c)   Immediately upon the action of the Board of Directors of the
                   Company ordering the redemption of the Rights pursuant to
                   Section 23(b) hereof, and without any further action and
                   without any notice, the right to exercise the Rights will
                   terminate and the only right thereafter of the holders of
                   Rights shall be to receive the Redemption Price. The Company
                   shall promptly give public notice of any such redemption;
                   provided, however, that the failure to give, or any defect
                   in, any such notice shall not affect the validity of such
                   redemption. Within 10 days after such action of the Board of
                   Directors ordering the redemption of the Rights pursuant to
                   Section 23(b) hereof, the Company shall mail a notice of
                   redemption to all the holders of the then outstanding Rights
                   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, provided, however, that failure to give, or any
                   defect in, any such notice shall not affect the validity of
                   such redemption. 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
                   hereof, and other than in connection with the purchase of
                   Common Shares prior to the Distribution Date.

             (d)   The Company may, at its option, discharge all of its 
                   obligations with respect to any redemption of the Rights by
                   (i) issuing a press release announcing the manner of
                   redemption of the Rights and (ii) mailing payment of the
                   Redemption Price to the registered holders of the Rights at
                   their last addresses as they appear on 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,
                   and upon such action, all outstanding Right Certificates
                   shall be null and void without any further action by the
                   Company.

SECTION 24.  EXCHANGE.

             (a)   The Board of Directors of the Company may, at its option, at
                   any time after any Person becomes an Acquiring Person,
                   exchange all or part of the then outstanding and exercisable
                   Rights (which shall not include Rights that have become void
                   pursuant to the provisions of Section 11(a)(ii) hereof) for
                   Common Shares at an exchange ratio of one Common Share per
                   Right, appropriately adjusted to reflect any stock split,
                   stock dividend or similar transaction occurring after the
                   date hereof (such exchange ratio being hereinafter referred
                   to as the "Exchange Ratio"). Notwithstanding the foregoing,
                   the Board of Directors shall not be empowered to effect such
                   exchange at any time after any Person (other than the
                   Company, any

                                       35
<PAGE>
 
                   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 of the
                   Company ordering the exchange of any Rights pursuant to
                   Section 24(a) hereof and without any further action and
                   without any notice, the right to exercise such Rights shall
                   terminate and the only right thereafter of a holder of such
                   Rights shall be to receive that number of Common Shares equal
                   to the number of such Rights held by such holder multiplied
                   by the Exchange Ratio. The Company shall promptly give public
                   notice of any such exchange; provided, however, that the
                   failure to give, or any defect in, such notice shall not
                   affect the validity of such exchange. The Company promptly
                   shall mail a notice of any such exchange to all of the
                   holders of such Rights at their last addresses as they appear
                   upon the registry books of the Rights Agent; provided,
                   however, that the failure to give, or any defect in, such
                   notice shall not affect the validity of such exchange. Any
                   notice which is mailed in the manner herein provided shall be
                   deemed given, whether or not the holder receives the notice.
                   Each such notice of exchange will state the method by which
                   the exchange of the Common Shares for Rights will be effected
                   and, in the event of any partial exchange, the number of
                   Rights which will be exchanged. Any partial exchange shall be
                   effected pro rata based on the number of Rights (other than
                   Rights which have become void pursuant to the provisions of
                   Section 11(a)(ii) hereof) held by each holder of Rights.

             (c)   In lieu of issuing Common Shares in accordance with Section
                   24(a) hereof, the Company may, if a majority of the Board of
                   Directors then in office determines that such action is
                   necessary or appropriate and not contrary to the interests of
                   the holders of Rights, elect to (and, in the event that there
                   are not sufficient treasury shares and authorized but
                   unissued Common Shares to permit any exchange of the Rights
                   in accordance with Section 24(a) hereof, the Company shall)
                   take all such action as may be necessary to authorize, issue
                   or pay, upon the exchange of the Rights, cash (including by
                   way of a reduction of the Purchase Price), property, Common
                   Shares, other securities or any combination thereof having an
                   aggregate value equal to the value of the Common Shares which
                   otherwise would have been issuable pursuant to Section 24(a)
                   hereof, which aggregate value shall be determined by a
                   nationally recognized investment banking firm selected by a
                   majority of the Board of Directors then in office. For
                   purposes of the preceding sentence, the value of the Common
                   Shares shall be determined pursuant to Section 11(d) hereof.
                   Any election pursuant to this Section 24(c) by the Board of
                   Directors must be made within 60 days following the date on
                   which the event described in Section

                                       36
<PAGE>
 
                   11(a)(ii) hereof shall have occurred. Following the
                   occurrence on the event described in Section 11(a)(ii)
                   hereof, a majority of the Board of Directors then in office
                   may suspend the exercisability of the Rights for a period of
                   up to 60 days following the date on which the event described
                   in Section 11(a)(ii) hereof shall have occurred to the extent
                   that such directors have not determined whether to exercise
                   their rights of election under this Section 24(c). 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 which evidence
                   fractional Common Shares. In lieu of such fractional Common
                   Shares, the Company shall pay to the registered holders of
                   the Right 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 market value of a
                   whole Common Share. For the purposes of this Section 24(d),
                   the current market value of a whole Common Share shall be the
                   closing price of a Common Share (as determined pursuant to
                   the second sentence of Section 11(d)(i) hereof) for the
                   Trading Day immediately after the date of the first public
                   announcement by the Company that an exchange is to be
                   effected pursuant to this Section 24.

             (e)   The Company shall not be required to issue fractions of 
                   Preferred Shares (other than fractions which are integral
                   multiples of one one-hundredth of a Preferred Share) upon
                   exchange of the Rights or to distribute certificates which
                   evidence fractional Preferred Shares (other than fractions
                   which are integral multiples of one one-hundredth of a
                   Preferred Share). Fractions of Preferred Shares in integral
                   multiples of one one-hundredth of a Preferred Share may, at
                   the election of the Company, be evidenced by depositary
                   receipts; provided, however, that holders of such depositary
                   receipts shall have all of the designations and the powers,
                   preferences and rights, and the qualifications, limitations
                   and restrictions to which they are entitled as beneficial
                   owners of the Preferred Shares represented by such depositary
                   receipts. In lieu of fractional Preferred Shares that are not
                   integral multiples of one one-hundredth of a Preferred Share,
                   the Company shall pay to the registered holders of Right
                   Certificates at the time such Rights are exercised as herein
                   provided an amount in cash equal to the same fraction of the
                   current market value of one Preferred Share. For the purposes
                   of this Section 24(e), the current market value of a
                   Preferred Share shall be one hundred (100) times the closing
                   price of a Common Share (as determined pursuant to the second
                   sentence of Section 11(d)(i) hereof) for the Trading Day
                   immediately after the date of the first public announcement
                   by the Company that an exchange is to be effected pursuant to
                   this Section 24.

                                       37
<PAGE>
 
SECTION 25.  NOTICE OF CERTAIN EVENTS.

             (a)   In case the Company shall propose (i) to pay any dividend 
                   payable in stock of any class to the holders of its Preferred
                   Shares or to make any other distribution to the holders of
                   its Preferred Shares (other than a regular quarterly cash
                   dividend), (ii) to offer to the holders of its Preferred
                   Shares rights or warrants to subscribe for or to purchase any
                   additional Preferred Shares or shares of stock of any class
                   or any other securities, rights or options, (iii) to effect
                   any reclassification of its Preferred Shares (other than a
                   reclassification involving only the subdivision of
                   outstanding Preferred Shares), (iv) to effect any
                   consolidation or merger into or with, or to effect any sale
                   or other transfer (or to permit one or more of its
                   Subsidiaries to effect any sale or other transfer), in one or
                   more transactions, of 50% or more of the assets or earning
                   power of the Company and its Subsidiaries (taken as a whole),
                   to any other Person, (v) to effect the liquidation,
                   dissolution or winding up of the Company, or (vi) to declare
                   or pay any dividend on the Common Shares payable in Common
                   Shares or to effect a subdivision, combination or
                   consolidation of the Common Shares (by reclassification or
                   otherwise than by payment of dividends in Common Shares),
                   then, in each such case, the Company shall give to each
                   holder of a Right Certificate, in accordance with Section 26
                   hereof, a notice of such proposed action, which shall specify
                   the record date for the purpose of such stock dividend, or
                   distribution of rights or warrants, or the date on which such
                   reclassification, consolidation, merger, sale, transfer,
                   liquidation, dissolution, or winding up is to take place and
                   the date of participation therein by the holders of the
                   Common Shares and/or the Preferred Shares, if any such date
                   is to be fixed, and such notice shall be so given in the case
                   of any action covered by clause (i) or (ii) above at least 10
                   days prior to the record date for determining holders of the
                   Preferred Shares for purposes of such action, and in the case
                   of any such other action, at least 10 days prior to the date
                   of the taking of such proposed action or the date of
                   participation therein by the holders of the Common Shares
                   and/or the Preferred Shares, whichever shall be the earlier.

             (b)   In case the event set forth in Section 11(a)(ii) hereof 
                   shall occur, then the Company shall as soon as practicable
                   thereafter give to each holder of a Right Certificate, in
                   accordance with Section 26 hereof, a notice of the occurrence
                   of such event, which notice shall describe the event and the
                   consequences of the event to holders of Rights under Section
                   11(a)(ii) hereof.

SECTION 26.  NOTICES.     Notices or demands authorized by this Agreement to be
             given or made by the Rights Agent or by the holder of any Right
             Certificate to or on the Company shall be sufficiently given or
             made if sent by first-class mail, postage

                                       38
<PAGE>
 
             prepaid, addressed (until another address is filed in writing with
             the Rights Agent) as follows:

                    Aspect Development, Inc.
                    1300 Charleston Road
                    Mountain View, California 94043
                    Attention: President

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

                    U. S. Stock Transfer Corporation
                    1745 Gardenia Avenue
                    Glendale, California 91204
                    Attention:  Customer Service

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

SECTION 27.  SUPPLEMENTS AND AMENDMENTS.  Prior to the Distribution Date, the
             Company and the Rights Agent shall, if the Company so directs,
             supplement or amend any provision of this Agreement without the
             approval of any holders of the Rights. From and after the
             Distribution Date, the Company and the Rights Agent shall, if the
             Company so directs, from time to time supplement or amend any
             provision of this Agreement without the approval of any holders of
             Right Certificates 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, or (iii) change
             any other provisions with respect to the Rights which the Company
             may deem necessary or desirable; provided, however, that no such
             supplement or amendment shall be made which would adversely affect
             the interests of the holders of Rights (other than the interests of
             an Acquiring Person or its Affiliates or Associates). Any
             supplement or amendment adopted during any period after any Person
             has become an Acquiring Person but prior to the Distribution Date
             shall become null and void unless such supplement or amendment
             could have been adopted by the Company from and after the
             Distribution Date. Any such supplement or amendment shall be
             evidenced by a writing signed by the Company and the Rights Agent.
             Upon delivery of a certificate from an appropriate officer of the
             Company which states that the proposed supplement or amendment is
             in compliance with the terms of this Section 27, the Rights Agent
             shall execute such supplement or amendment unless the Rights Agent
             shall have

                                       39
<PAGE>
 
             determined in good faith that such supplement or amendment would
             adversely affect its interest under this Agreement. 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.

SECTION 28.  DETERMINATION 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 or any other securities 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 as in effect on the date of this
             Agreement. The Board of Directors of the Company shall have the
             exclusive power and authority to administer this Agreement and to
             exercise all rights and powers specifically granted to the Board,
             or the Company, or as may be necessary or advisable in the
             administration of this Agreement, including without limitation, the
             right and power to (i) interpret the provisions of this Agreement,
             and (ii) make all determinations deemed necessary or advisable for
             the administration of this Agreement (including a determination to
             redeem or not redeem the Rights or to amend the Agreement). All
             such actions, calculations, interpretations and determinations
             (including, for purposes of clause (y) below, all omissions with
             respect to the foregoing) which are done or made by the Board in
             good faith, shall (x) be final, conclusive and binding on the
             Rights Agent and the holders of the Rights, and (y) not subject the
             Board to any liability to the holders of the Rights.

SECTION 29.  SUCCESSORS.  All the covenants and provisions of this Agreement
             by or for the benefit of the Company or the Rights Agent shall bind
             and inure to the benefit of their respective successors and assigns
             hereunder.

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

SECTION 31.  SEVERABILITY.  If any term, provision, covenant or restriction of
             this Agreement is held by a court of competent jurisdiction or
             other authority to be invalid, void or unenforceable, the remainder
             of the terms, provisions, covenants and restrictions of this
             Agreement shall remain in full force and effect and shall in no way
             be affected, impaired or invalidated.

SECTION 32.  GOVERNING LAW.  This Agreement and each Right Certificate issued
             hereunder shall be deemed to be a contract made under the laws of
             the State of Delaware and for all purposes shall be governed by and
             construed in accordance with the laws 

                                       40
<PAGE>
 
             of such State applicable to contracts to be made and performed
             entirely within such State.

SECTION 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.

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

                                       41
<PAGE>
 
     IN WITNESS WHEREOF, parties whereto have caused this Agreement to be duly
executed, all as of the day and year first above written.

ATTEST:                                 ASPECT DEVELOPMENT, INC.


By: /s/ William Feichtmann              By:  /s/ David S. Dury               
    -----------------------------           --------------------------------

Print Name: William Feichtmann          Print Name:  David S. Dury           
            ---------------------                   ------------------------

Title: Corporate Secretary              Title:  Vice President and Chief    
       --------------------------               ----------------------------
                                                Financial Officer
                                                -----------------

ATTEST:                                 U. S. STOCK TRANSFER CORPORATION


By: /s/ Henry Artaza                    By: /s/ Richard C. Brown            
    -----------------------------           --------------------------------

Print Name: Henry Artaza                Print Name: Richard C. Brown        
            ---------------------                   ------------------------

Title: Senior Vice President            Title: Vice President               
       --------------------------              -----------------------------

                                       42
<PAGE>
 
                          ASPECT DEVELOPMENT, INC.

                        SUMMARY OF RIGHTS TO PURCHASE
                              PREFERRED SHARES

                         (EXHIBIT C TO RIGHTS PLAN)

     On September 1, 1998 the Board of Directors of ASPECT DEVELOPMENT, INC.
(the "Company") declared a dividend of one preferred share purchase right (a
"Right") for each outstanding share of common stock, par value $.001 per share
(the "Common Shares"), of the Company. The dividend is effective as of October
22, 1998 (the "Record Date") with respect to the stockholders of record on
that date. The Rights will also attach to new Common Shares issued after the
Record Date. Each Right entitles the registered holder to purchase from the
Company one one-hundredth of a share of a Series A Junior Participating
Preferred Stock, par value $.001 per share (the "Preferred Shares"), of the
Company at a price of $187.50 per one one-hundredth of a Preferred Share (the
"Purchase Price"), subject to adjustment. Each Preferred Share is designed to
be the economic equivalent of 100 Common Shares. The description and terms of
the Rights are set forth in a Rights Agreement dated as of October 7, 1998
(the "Rights Agreement"), between the Company and the U.S. Stock Transfer
Corporation (the "Rights Agreement").

DETACHMENT AND TRANSFER OF RIGHTS

     Initially, the Rights will be evidenced by the stock certificates 
representing Common Shares then outstanding, and no separate Right 
Certificates will be distributed. Until the earlier to occur of (i) a public 
announcement that a person or group of affiliated or associated persons, has 
become an "Acquiring Person" (as such term is defined in the Rights 
Agreement) or (ii) 10 business days (or such later date as the Board may 
determine) following the commencement of, or announcement of an intention to 
make, a tender offer or exchange offer which would result in the 
beneficial ownership by an Acquiring Person of 15% or more of the outstanding 
Common Shares (the earlier of such dates being called the "Distribution 
Date"), the Rights will be evidenced, with respect to any of the Common 
Share certificates outstanding as of the Record Date, by such Common Share 
certificate. In general, an "Acquiring Person" is a person, the affiliates or 
associates of such person, or a group, which has acquired beneficial ownership 
of 15% or more of the outstanding Common Shares provided that certain 
                                                -------------
"Excluded Stockholders" as defined in the Rights Agreement may have greater 
beneficial ownership without becoming an "Acquiring Person."

     The Rights Agreement provides that, until the Distribution Date (or 
earlier redemption or expiration of the Rights), the Rights will be 
transferable with and only with the Common Shares. Until the Distribution Date
(or earlier redemption or expiration of the Rights), new Common Share 
certificates issued after the Record Date upon transfer or 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 or transfer of any certificates for Common Shares
outstanding as of the Record Date, even without such notation or a copy of 
this summary or Rights being attached thereto, will also constitute the 
transfer of the

                                     1.
<PAGE>
 
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.

EXERCISABILITY OF RIGHTS

     The Rights are not exercisable until the Distribution Date. The Rights
will expire on October 7, 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. 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.

     The Purchase Price payable, and the number of Preferred Shares or other
securities or property issuable or payable, upon exercise of the Rights are
subject to adjustment from time to time to prevent dilution. The number of
outstanding Rights and the number of one one-hundredths of a Preferred Share
issuable upon exercise of each Right are also subject to adjustment in the
event of a stock split of the Common Shares or a stock dividend on the Common 
Shares payable in Common Shares, or subdivisions, consolidations or combinations
of the Common Shares occurring, in any such case, prior to the Distribution
Date. With certain exceptions, no adjustment in the Purchase Price will be
required until cumulative adjustments require an adjustment of at least 1% in
such Purchase Price. No fractional Preferred Shares will be issued (other than
fractions which are integral multiples of one one-hundredth of a Preferred
Share, which may, at the election of the Company, be evidenced by depositary
receipts) and in lieu thereof, an adjustment in cash will be made based on the
market price of the Preferred Shares on the last trading day prior to the date
of exercise.

TERMS OF PREFERRED SHARES

     Preferred Shares purchasable upon exercise of the Rights will not be 
redeemable. Each Preferred Share will be entitled to a minimum preferential 
quarterly dividend payment of $1 per share but will be entitled to an 
aggregate dividend of 100 times the dividend declared per Common Share. In the
event of liquidation, the holders of the Preferred Shares will be entitled to 
a minimum preferential liquidation payment of $100 per share but will be 
entitled to an aggregate payment of 100 times the payment made per Common 
Share. Each Preferred Share will have 100 votes, voting together with the 
Common Shares. Finally, in the event of any merger, consolidation or other 
transaction in which Common Shares are exchanged, each Preferred Share will be
entitled to receive 100 times the amount received per Common Share. These 
rights are protected by customary anti-dilution provisions. Because of the 
nature of the Preferred Shares' dividend, liquidation and voting rights, the 
value of the one one-hundredth interest in a Preferred Shares purchasable upon 
exercise of each Right should approximate the value of one Common Share. The 
Preferred Shares would rank junior to any other series of the Company's 
preferred stock.

                                     2.






















































<PAGE>
 
TRIGGER OF FLIP-IN AND FLIP-OVER RIGHTS

        In the event that any person or group of affiliated or associated
persons becomes an Acquiring Person, proper provision shall be made so that
each holder of a Right, other than Rights beneficially owned by the Acquiring
Person or any affiliate or associate thereof (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.
This right will commence on the date of public announcement that a person has
become an Acquiring Person (or the effective date of a registration statement
relating to distribution of the rights, if later) and terminate 60 days later
(subject to adjustment in the event exercise of the rights is enjoined).

        In the event that the Company is acquired in a merger or other business
combination transaction of 50% or more of its consolidated assets or earning 
power are sold to an Acquiring Person, its affiliates or associates or certain
other persons in which such persons have an interest, proper provision will be
made so that each such holder of a Right will thereafter have the right to 
receive, upon the exercise thereof at the then current exercise price of the 
Right, that number of shares of common stock of the acquiring company which at
the time of such transaction will have a market value of two times the 
exercise price of the Right.

REDEMPTION AND EXCHANGE OF RIGHTS

        At any time prior to the earliest of (i) the close of business on the 
day of the first public announcement that a person has become an Acquiring 
Person, or (ii) the Final Expiration Date, the Board of Directors of the 
Company may redeem the Rights in whole, but not in part, at a price of $0.001 
per Right (the "Redemption Price"). In general, the redemption of the Rights 
may be made effective at such time on such basis with such conditions as the 
Board of Directors in its sole discretion may establish. Immediately upon any 
redemption of the 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.

        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, the Board of Directors of the Company may exchange the Rights 
(other than Rights owned by such person or group which will have become void),
in whole or in part, at an exchange ratio of one Common Share, or, under 
circumstances set forth in the Rights Agreement, cash, property or other 
securities of the Company, including fractions of a Preferred Share (or of a 
share of a class or series of the Company's preferred stock having equivalent 
designations and the powers, preferences and rights, and the qualifications,
limitations and restrictions), per Right (with value equal to such Common 
Shares).

AMENDMENT OF RIGHTS

        The terms of the Rights generally may be amended by the Board of 
Directors of the Company without the consent of the holders of the Rights, 
except that from and after such time as the Rights are distributed no such 
amendment may adversely affect the interests of the holders of the Rights 
(excluding the interest of any Acquiring Person).



                                     3.
<PAGE>
 
ADDITIONAL INFORMATION

        A copy of the Rights Agreement has been filed with the Securities and 
Exchange Commission as an Exhibit to a Current Report on Form 8-K dated 
October 13, 1998. A copy of the Rights Agreement is available from the Company
by writing to: Aspect Development, Inc., 1300 Charleston Road, Mountain View, 
California 94043, Attention: Investor Relations. This summary description of 
the Rights is not intended to be complete and is qualified in its entirety by 
reference to the Rights Agreement, which is hereby incorporated herein by 
reference.




                                     4.

<PAGE>
 
                                                                    EXHIBIT 99.3

                           CERTIFICATE OF DESIGNATION

                                       OF

                 SERIES A JUNIOR PARTICIPATING PREFERRED STOCK

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


     ASPECT DEVELOPMENT, INC., a corporation organized and existing under the

General Corporation Law of the State of Delaware (hereinafter called the

"Company"), hereby certifies that the following resolution was adopted by the

Board of Directors of the Corporation as required by Section 151 of the General

Corporation Law by unanimous written consent dated September 1, 1998:

          RESOLVED, that pursuant to the authority granted to and vested in the
          Board of Directors of the Company in accordance with the provisions of
          its Restated Certificate of Incorporation, the Board of Directors
          hereby creates a series of Preferred Stock, par value $.001 per share,
          of the Company and hereby states the designation and number of shares,
          and fixes the relative designations and the powers, preferences and
          rights, and the qualifications, limitations and restrictions thereof
          (in addition to the provisions set forth in the Certificate of
          Incorporation of the Company, which are applicable to the Preferred
          Stock of all classes and series), as follows:

          Series A Junior Participating Preferred Stock:

     SECTION 1. DESIGNATION AND AMOUNT. Six Hundred Thousand (600,000) shares
of Preferred Stock, $.001 par value, are designated "Series A Junior
Participating Preferred Stock" with the designations and the powers, preferences
and rights, and the qualifications, limitations and restrictions specified
herein (the "Junior Preferred Stock"). Such number of shares may be increased or
decreased by resolution of the Board of Directors; provided, that no decrease
                                                   --------
shall reduce the number of shares of Junior Preferred Stock to a number less
than the number of shares then outstanding plus the number of shares reserved
for issuance upon the exercise of

                                      A-1
<PAGE>
 
outstanding options, rights or warrants or upon the conversion of any
outstanding securities issued by the Company convertible into Junior Preferred
Stock.

     SECTION 2.  DIVIDENDS AND DISTRIBUTIONS.

     (A)  Subject to the rights of the holders of any shares of any series of
Preferred Stock (or any similar stock) ranking prior and superior to the Junior
Preferred Stock with respect to dividends, the holders of shares of Junior
Preferred Stock, in preference to the holders of Common Stock, par value $.001
per share (the "Common Stock"), of the Company, and of any other junior stock,
shall be entitled to receive, when, as and if declared by the Board of Directors
out of funds legally available for the purpose, quarterly dividends payable in
cash on the first day of April, July, October and January in each year (each
such date being referred to herein as a "Quarterly Dividend Payment Date"),
commencing on the first Quarterly Dividend Payment Date after the first issuance
of a share or fraction of a share of Junior Preferred Stock, in an amount per
share (rounded to the nearest cent) equal to the greater of (a) $l.00 or (b)
subject to the provision for adjustment hereinafter set forth, 100 times the
aggregate per share amount of all cash dividends, and 100 times the aggregate
per share amount (payable in kind) of all non-cash dividends or other
distributions, other than a dividend payable in shares of Common Stock or a
subdivision of the outstanding shares of Common Stock (by reclassification or
otherwise), declared on the Common Stock since the immediately preceding
Quarterly Dividend Payment Date or, with respect to the first Quarterly Dividend
Payment Date, since the first issuance of any share or fraction of a share of
Junior Preferred Stock. In the event the Company shall at any time declare or
pay any dividend on the Common Stock payable in shares of Common Stock, or
effect a subdivision or combination or consolidation of the outstanding shares
of Common Stock (by reclassification or otherwise than by payment of a dividend
in shares of Common Stock) into a greater or lesser number of shares of Common
Stock, then in each such case the amount to which holders of shares of Junior
Preferred Stock were entitled immediately prior to such event under clause (b)
of the preceding sentence shall be adjusted by multiplying such amount by a
fraction, the numerator of which is the number of shares of Common Stock
outstanding immediately after such event and the denominator of which is the
number of shares of Common Stock that were outstanding immediately prior to such
event.

     (B)  The Company shall declare a dividend or distribution on the Junior
Preferred Stock as provided in paragraph (A) of this Section immediately after
it declares a dividend or distribution on the Common Stock (other than a
dividend payable in shares of Common Stock); provided, that in the event no
                                             --------
dividend or distribution shall have been declared on the Common Stock during the
period between any Quarterly Dividend Payment Date and the next subsequent
Quarterly Dividend Payment Date, a dividend of $1.00 per share on the Junior
Preferred Stock shall nevertheless be payable on such subsequent Quarterly
Dividend Payment Date.

     (C) Dividends shall begin to accrue and be cumulative on outstanding shares
of Junior Preferred Stock from the Quarterly Dividend Payment Date next
preceding the date of issue of such shares, unless the date of issue of such
shares is prior to the record date for the first Quarterly Dividend Payment
Date, in which case dividends on such shares shall begin to accrue from the date
of issue of such shares, or unless the date of issue is a Quarterly Dividend
Payment Date or is a date after the record date for the determination of holders
of shares of Junior

                                      A-2
<PAGE>
 
Preferred Stock entitled to receive a quarterly dividend and before such
Quarterly Dividend Payment Date, in either of which events such dividends shall
begin to accrue and be cumulative from such Quarterly Dividend Payment Date.
Accrued but unpaid dividends shall not bear interest. Dividends paid on the
shares of Junior Preferred Stock in an amount less than the total amount of such
dividends at the time accrued and payable on such shares shall be allocated pro
rata on a share-by-share basis among all such shares at the time outstanding.
The Board of Directors may fix a record date for the determination of holders of
shares of Junior Preferred Stock entitled to receive payment of a dividend or
distribution declared thereon, which record date shall be not more than 60 days
prior to the date fixed for the payment thereof.

     SECTION 3.  VOTING RIGHTS.  The holders of shares of Junior Preferred Stock
shall have the following voting rights:

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

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

     (C) Except as set forth herein, or as otherwise provided by law, holders of
Junior Preferred Stock shall have no special voting rights and their consent
shall not be required (except to the extent they are entitled to vote with
holders of Common Stock as set forth herein) for taking any corporate action.

     SECTION 4.  CERTAIN RESTRICTIONS.

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

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

                                      A-3
<PAGE>
 
         (ii)  declare or pay dividends, or make any other distributions, on any
shares of stock ranking on a parity (either as to dividends or upon liquidation,
dissolution or winding up) with the Junior Preferred Stock, except dividends
paid ratably on the Junior Preferred Stock and all such parity stock on which
dividends are payable or in arrears in proportion to the total amounts to which
the holders of all such shares are then entitled;

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

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

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

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

     SECTION 6. LIQUIDATION, DISSOLUTION OR WINDING UP. Upon any liquidation,
dissolution or winding up of the Company, no distribution shall be made (1) to
the holders of shares of stock ranking junior (either as to dividends or upon
liquidation, dissolution or winding up) to the Junior Preferred Stock unless,
prior thereto, the holders of shares of Junior Preferred Stock shall have
received $100 per share, plus an amount equal to accrued and unpaid dividends
and distributions thereon, whether or not declared, to the date of such payment,
provided that the holders of shares of Junior Preferred Stock shall be entitled
to receive an aggregate amount per share, subject to the provision for
adjustment hereinafter set forth, equal to 100 times the aggregate amount to be
distributed per share to holders of shares of Common Stock, or (2) to the
holders of shares of stock ranking on a parity (either as to dividends or upon
liquidation, dissolution or winding up) with the Junior Preferred Stock, except
distributions made ratably on the Junior Preferred Stock and all such parity
stock in proportion to the total amounts to which  

                                      A-4
<PAGE>
 
the holders of all such shares are entitled upon such liquidation, dissolution
or winding up. In the event the Company shall at any time declare or pay any
dividend on the Common Stock payable in shares of Common Stock, or effect a
subdivision or combination or consolidation of the outstanding shares of Common
Stock (by reclassification or otherwise than by payment of a dividend in shares
of Common Stock) into a greater or lesser number of shares of Common Stock, then
in each such case the aggregate amount to which holders of shares of Junior
Preferred Stock were entitled immediately prior to such event under the proviso
in clause (1) of the preceding sentence shall be adjusted by multiplying such
amount by a fraction the numerator of which is the number of shares of Common
Stock outstanding immediately after such event and the denominator of which is
the number of shares of Common Stock that were outstanding immediately prior to
such event.

     SECTION 7.  CONSOLIDATION, MERGER, ETC. In case the Company shall enter
into any consolidation, merger, combination or other transaction in which the
shares of Common Stock are exchanged for or changed into other stock or
securities, cash and/or any other property, then in any such case each share of
Junior Preferred Stock shall at the same time be similarly exchanged or changed
into an amount per share, subject to the provision for adjustment hereinafter
set forth, equal to 100 times the aggregate amount of stock, securities, cash
and/or any other property (payable in kind), as the case may be, into which or
for which each share of Common Stock is changed or exchanged. In the event the
Company shall at any time declare or pay any dividend on the Common Stock
payable in shares of Common Stock, or effect a subdivision or combination or
consolidation of the outstanding shares of Common Stock (by reclassification or
otherwise than by payment of a dividend in shares of Common Stock) into a
greater or lesser number of shares of Common Stock, then in each such case the
amount set forth in the preceding sentence with respect to the exchange or
change of shares of Junior Preferred Stock shall be adjusted by multiplying such
amount by a fraction, the numerator of which is the number of shares of Common
Stock outstanding immediately after such event and the denominator of which is
the number of shares of Common Stock that were outstanding immediately prior to
such event.

     SECTION 8.  NO REDEMPTION. The shares of Junior Preferred Stock shall not
be redeemable.

     SECTION 9.  RANK. The Junior Preferred Stock shall rank, with respect to
the payment of dividends and the distribution of assets, junior to all series of
any other class of the Company's Preferred Stock.

     SECTION 10. AMENDMENT.  The Restated Certificate of Incorporation of the
Company shall not be amended in any manner which would materially alter or
change the powers, preferences or special rights of the Junior Preferred Stock
so as to affect them adversely without the affirmative vote of the holders of at
least two-thirds of the outstanding shares of Junior Preferred Stock, voting
together as a single class.

                                      A-5
<PAGE>
 
     IN WITNESS WHEREOF, the undersigned have executed this certificate as of
October 13, 1998.
 
                                          /s/ David S. Dury
                                          ------------------------------------
                                          David S. Dury
                                          Vice President 
                                          and Chief Financial Officer

                                          /s/ William H. Feichtmann
                                          ------------------------------------
                                          William H. Feichtmann
                                          Secretary


      
                                      A-6

<PAGE>
 
                                                                    EXHIBIT 99.4
 

                           FORM OF RIGHT CERTIFICATE


CERTIFICATE NO. R-                                                 _____ RIGHTS


     NOT EXERCISABLE AFTER OCTOBER 7, 2008 OR EARLIER IF REDEMPTION OR EXCHANGE
     OCCURS.  THE RIGHTS ARE SUBJECT TO REDEMPTION AT $.001 PER RIGHT AND TO
     EXCHANGE ON THE TERMS SET FORTH IN THE RIGHTS AGREEMENT.


                               RIGHT CERTIFICATE

                            ASPECT DEVELOPMENT, INC.


     This certifies that ___________________ or registered assigns, is the
registered owner of the number of Rights set forth above, each of which entitles
the owner thereof, subject to the terms, provisions and conditions of the Rights
Agreement, dated as of October 7, 1998 (the "Rights Agreement"), between Aspect
Development, Inc., a Delaware corporation (the "Company"), and U.S. Stock
Transfer Corporation (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., Pacific Time, on October 7, 2008 at the
office of the Rights Agent designated for such purpose, or at the office of
its successor as Rights Agent, one one-hundredth of a fully paid non-
assessable share of Series A Junior Participating Preferred Stock, par value
$.001 per share (the "Preferred Shares"), of the Company, at a purchase price
of $187.50 per one one-hundredth of a Preferred Share (the "Purchase Price"),
upon presentation and surrender of this Right Certificate with the Form of
Election to Purchase duly executed. The number of Rights evidenced by this
Right Certificate (and the number of one one-hundredths of a Preferred Share
which may be purchased upon exercise hereof) set forth above, and the Purchase
Price set forth above, are the number and Purchase Price as of October 22, 1998,
based on the Preferred Shares as constituted at such date.

     From and after the time any Person becomes an Acquiring Person, (as such
terms are defined in the Rights Agreement), if the Rights evidenced by this
Right Certificate are beneficially owned by (i) an Acquiring Person or an
Affiliate or Associate of any such Acquiring Person (as such terms are defined
in the Rights Agreement), (ii) a transferee of any such Acquiring Person,
Associate or Affiliate who becomes a transferee after the Acquiring Person
becomes such, or (iii) under certain circumstances specified in the Rights
Agreement, a transferee of any such Acquiring Person, Associate or Affiliate who
becomes a transferee prior to or concurrently with the Acquiring Person becoming
such, such Rights shall become null and void without any further action and no
holder hereof shall have any right with respect to such Rights from and after
the time any Person becomes an Acquiring Person.

                                      B-1

<PAGE>
 
     As provided in the Rights Agreement, the Purchase Price and the number of
one one-hundredths of a Preferred Share which may be purchased upon the exercise
of the Rights evidenced by this Right Certificate are subject to modification
and adjustment upon the happening of certain events.

     This Right Certificate is subject to all of the terms, provisions and
conditions of the Rights Agreement, as amended from time to time, 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
Right Certificates.  Copies of the Rights Agreement are on file at the principal
executive offices of the Company and the above-mentioned offices of the Rights
Agent.

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

     Subject to the provisions of the Rights Agreement, the Rights evidenced by
this Certificate (i) may be redeemed by the Company at a redemption price of
$.001 per Right or (ii) may be exchanged in whole or in part for shares of the
Company's Common Stock, par value $.001 per share, or, upon circumstances set
forth in the Rights Agreement, cash, property or other securities of the
Company, including fractions of a share of Preferred Stock.

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

     No holder of this Right Certificate shall be 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 Right Certificate shall have been
exercised as provided in the Rights Agreement.

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

                                      B-2

<PAGE>
 
     WITNESS the facsimile signature of the proper officers of the Company and
its corporate seal.  Dated as of __________.


ATTEST:                                 ASPECT DEVELOPMENT, INC.



__________________________________      ____________________________________ 
[Signing Company Secretary's Name]      [Signing Company Officer's Name]
[Title]                                 [Title]



COUNTERSIGNED:


__________________________________ 
as Rights Agent



By:_______________________________
   [Authorized Signature]

                                      B-3

<PAGE>
 
                   Form of Reverse Side of Right Certificate


                               FORM OF ASSIGNMENT


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


     FOR VALUE RECEIVED ______________________________________ hereby sells,
assigns and transfers unto

______________________________________________________________
                 (Please print name and address of transferee)

______________________________________________________________ this Right

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


Dated:  ____________________



                                          ________________________________  
                                          Signature                        



             Form of Reverse Side of Right Certificate -- continued

                                      B-4

<PAGE>
 
Signature Guaranteed:

     Signatures must be guaranteed by an "eligible guarantor institution" as
defined in Rule 17Ad-15 promulgated under the Securities Exchange Act of 1934,
as amended.

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

     The undersigned hereby certifies that (1) the Rights evidenced by this
Right Certificate are not being sold, assigned or transferred by or on behalf of
a Person who is or was an Acquiring Person, an Interested Stockholder or an
Affiliate or Associate thereof (as such terms are defined in the Rights
Agreement); and (2) after due inquiry and to the best of the knowledge of the
undersigned, the undersigned did not acquire the Rights evidenced by this Right
Certificate from any Person who is or was an Acquiring Person, an Interested
Stockholder, or an Affiliate or Associate thereof.


                                          ________________________________
                                          Signature                      



                                      B-5

<PAGE>
 
                          FORM OF ELECTION TO PURCHASE

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


To __[Rights Agent]__

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

Please insert social security
or other identifying number: ______________


______________________________________________________________
                        (Please print name and address)

______________________________________________________________

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

Please insert social security
or other identifying number: ______________


______________________________________________________________
                        (Please print name and address)

______________________________________________________________


Dated:  _________________


                                         ________________________________ 
                                         Signature                       


             Form of Reverse Side of Right Certificate -- continued


                                      B-6

<PAGE>
 
Signature Guaranteed:

     Signatures must be guaranteed by an "eligible guarantor institution" as
defined in Rule 17Ad-15 promulgated under the Securities Exchange Act of 1934,
as amended.


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

     The undersigned hereby certifies that (1) the Rights evidenced by this
Right Certificate are not beneficially owned by nor are they being exercised on
behalf of an Acquiring Person, an Interested Stockholder or an Affiliate or
Associate thereof (as such terms are defined in the Rights Agreement); and (2)
after due inquiry and to the best of the knowledge of the undersigned, the
undersigned did not acquire the Rights evidenced by this Right Certificate from
any Person who is or was an Acquiring Person, an Interested Stockholder, or an
Affiliate or Associate thereof.



                                      ________________________________ 
                                      Signature                       

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

                                     NOTICE

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

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


                                      B-7



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