MEDFORD BANCORP INC
8-A12G, 1997-11-26
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<PAGE>   1
                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549
                        --------------------------------


                                    FORM 8-A

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

                              MEDFORD BANCORP, INC.
               (Exact name of registrant as specified in charter)


        MASSACHUSETTS                                            04-3384928
(State or other jurisdiction                                   (IRS employer
      of incorporation)                                      identification no.)


                  29 HIGH STREET, MEDFORD, MASSACHUSETTS 02155
               (Address of principal executive offices) (Zip code)


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

                                                      Name of each exchange 
     Title of each class                              on which each class is    
     to be so registered                              to be registered          
     -------------------                              ----------------          
                                                      
            NONE                                            NONE


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


                         PREFERRED STOCK PURCHASE RIGHTS
                                (Title of Class)


<PAGE>   2



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

         Medford Savings Bank (the "Bank") and State Street Bank and Trust
Company (the "Rights Agent") entered into a Shareholder Rights Agreement, dated
as of September 22, 1993 (the "Original Rights Agreement"), pursuant to which,
among other things, the Board of Directors of the Bank authorized and declared a
dividend distribution of one Right (as defined in the Original Rights Agreement
and hereinafter referred to as a "Bank Right")) per share of common stock, par
value $.50 per share, of the Bank ("Bank Common Stock") outstanding as of the
close of business on October 8, 1993 (the "Record Date"), to holders of
outstanding shares of Bank Common Stock as of the Record Date.

         Thereafter, the Bank and Medford Bancorp, Inc. (the "Company") entered
into a Plan of Reorganization and Acquisition (the "Plan of Reorganization"),
dated July 29, 1997, duly approved by the holders of Bank Common Stock at a
meeting held on September 16, 1997, pursuant to which the Bank became a
wholly-owned subsidiary of the Company and shares of Bank Common Stock (together
with associated preferred stock purchase rights (i.e., the Bank Rights)), except
those held by stockholders exercising dissenters' rights, were converted into
and exchanged for an equal number of shares of common stock, par value $.50 per
share, of the Company (together with associated preferred stock purchase rights
(i.e., the Rights, as hereinafter defined)).

         In accordance with the Plan of Reorganization, the Board of Directors
of the Company determined that it was in the best interests of the shareholders
of the Company to amend and restate the Original Rights Agreement in its
entirety to, among other things, confirm that the Bank Rights issued pursuant to
the Original Rights Agreement converted to equivalent preferred stock purchase
rights (the "Rights") with respect to the Common Stock (as defined in the
Company's Amended and Restated Shareholder Rights Agreement, dated as of
November 26, 1997 (the "Rights Agreement")). Therefore, on November 25, 1997,
the Boards of Directors of the Bank and the Company adopted resolutions
confirming the conversion of the Bank Rights to the Rights concurrently with the
conversion and exchange of Bank Common Stock for the Common Stock.

         The following description of the terms of the Rights Agreement does not
purport to be complete and is qualified in its entirety by reference to the
Rights Agreement.

         Pursuant to the terms of the Rights Agreement, in addition to Rights
currently outstanding, one Right will automatically attach to each share of
Common Stock issued between the Record Date and the Distribution Date (as
hereinafter defined). Each Right entitles the registered holder thereof to
purchase from the Company a unit consisting of one one-hundredth of a share (a
"Unit") of Series A Junior Participating Cumulative Preferred Stock of the
Company, par value $0.50 per share (the "Preferred Stock"), at a purchase price
of $90.00 per Unit (the "Exercise Price"), subject to adjustment.


                                        2

<PAGE>   3



         Initially, the Rights are not exercisable and are attached to and trade
with all outstanding shares of Common Stock outstanding as of, and issued
subsequent to, the Record Date. The Rights will separate from the Common Stock
and will become exercisable upon the earliest of (i) the close of business on
the tenth calendar day following the first public announcement that a person or
group of affiliated or associated persons has acquired beneficial ownership of
15% or more of the outstanding shares of Common Stock (an "Acquiring Person")
(the date of said announcement being referred to as the "Stock Acquisition
Date"), (ii) the close of business on the tenth business day (or such other day
as the Board of Directors may determine) following the commencement of a tender
offer or exchange offer that would result upon its consummation in a person or
group becoming the beneficial owner of 15% or more of the outstanding shares of
Common Stock or (iii) the determination by the Board of Directors that any
person is an "Adverse Person" (the earliest of such dates being herein referred
to as the "Distribution Date").

         The Board of Directors may declare a person to be an Adverse Person
after a determination that such person, alone or together with its affiliates
and associates, has become the beneficial owner of 10% or more of the
outstanding shares of Common Stock and a determination by the Board of
Directors, after reasonable inquiry and investigation, including such
consultation, if any, with such persons as the directors shall deem appropriate,
that (a) such beneficial ownership by such person is intended to cause, is
reasonably likely to cause or will cause the Company to repurchase the Common
Stock beneficially owned by such person or to cause pressure on the Company to
take action or enter into a transaction or series of transactions which would
provide such person with short-term financial gain under circumstances where the
Board of Directors determines that the best long-term interests of the Company
and its stockholders, but for the actions and possible actions of such person,
would not be served by taking such action or entering into such transaction or
series of transactions at that time or (b) such beneficial ownership is causing,
or is reasonably likely to cause, a material adverse impact (including, but not
limited to, impairment of relationships with customers or impairment of the
Company's ability to maintain its competitive position) on the business or
prospects of the Company. No delay or failure by the Board of Directors to
declare a person to be an Adverse Person shall in any way waive or otherwise
affect the power of the Board of Directors subsequently to declare a person an
Adverse Person. In the event that the Board of Directors should at any time
determine, upon reasonable inquiry and investigation, including consultation
with such persons as the Board of Directors shall deem appropriate, that such
person has not met or complied with any condition specified by the Board of
Directors, the Board of Directors may at any time thereafter declare the person
to be an Adverse Person.

         Until the Distribution Date (or earlier redemption, exchange or
expiration of the Rights), (a) the Rights will be evidenced by the Common Stock
certificates and will be transferred with and only with such Common Stock
certificates, (b) new Common Stock certificates issued after the Record Date
will contain a notation incorporating the Rights

                                        3

<PAGE>   4



Agreement by reference, and (c) the surrender for transfer of any certificates
for Common Stock will also constitute the transfer of the Rights associated with
the Common Stock represented by such certificate.

         The Rights are not exercisable until the Distribution Date and will
expire at the close of business on September 22, 2003, unless previously
redeemed or exchanged by the Company as described below.

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

         In the event that a Stock Acquisition Date occurs or the Board of
Directors determines that a person is an Adverse Person, proper provision will
be made so that each holder of a Right (other than an Acquiring Person, an
Adverse Person or their associates or affiliates, whose Rights shall become null
and void) will thereafter have the right to receive upon exercise that number of
Units of Preferred Stock of the Company having a market value of two times the
exercise price of the Right (such right being referred to as the "Subscription
Right"). In the event that, at any time following the Stock Acquisition Date,
(i) the Company consolidates with, or merges with and into, any other person,
and the Company is not the continuing or surviving corporation, (ii) any person
consolidates with the Company, or merges with and into the Company and the
Company is the continuing or surviving corporation of such merger and, in
connection with such merger, all or part of the shares of Common Stock are
changed into or exchanged for stock or other securities of any other person or
cash or any other property, or (iii) 50% or more of the Company's assets or
earning power is sold, mortgaged or otherwise transferred, each holder of a
Right shall thereafter have the right to receive, upon exercise, common stock of
the acquiring company having a market value equal to two times the exercise
price of the Right (such right being referred to as the "Merger Right"). The
holder of a Right will continue to have the Merger Right whether or not such
holder has exercised the Subscription Right. Rights that are or were
beneficially owned by an Acquiring Person or an Adverse Person may (under
certain circumstances specified in the Rights Agreement) become null and void.

         At any time after the Stock Acquisition Date occurs or the Board of
Directors determines that a person is an Adverse Person, the Board of Directors
may, at its option, exchange all or any part of the then outstanding and
exercisable Rights for shares of Common Stock or Units of Preferred Stock at an
exchange ratio of one share of Common Stock or one Unit of Preferred Stock per
Right. Notwithstanding the foregoing, the Board of Directors generally will not
be empowered to effect such exchange at any time after any person becomes the
beneficial owner of 50% or more of the Common Stock of the Company.


                                        4

<PAGE>   5



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

         With certain exceptions, no adjustment in the Exercise Price will be
required until cumulative adjustments amount to at least 1% of the Exercise
Price. The Company is not obligated to issue fractional Units. If the Company
elects not to issue fractional Units, in lieu thereof an adjustment in cash will
be made based on the fair market value of the Preferred Stock on the last
trading date prior to the date of exercise. Any of the provisions of the Rights
Agreement may be amended by the Board of Directors of the Company at any time
prior to the Distribution Date.

         The Rights may be redeemed in whole, but not in part, at a price of
$0.01 per Right (payable in cash, Common Stock or other consideration deemed
appropriate by the Board of Directors) by the Board of Directors only until the
earliest of (i) the date on which a person is declared to be an Adverse Person,
(ii) the close of business on the tenth calendar day after the Stock Acquisition
Date, or (iii) the expiration date of the Rights Agreement. Immediately upon the
action of the Board of Directors ordering redemption of the Rights, the Rights
will terminate and thereafter the only right of the holders of Rights will be to
receive the redemption price.

         The Rights Agreement may be amended by the Board of Directors in its
sole discretion until the Distribution Date. After the Distribution Date, the
Board of Directors may, subject to certain limitations set forth in the Rights
Agreement, amend the Rights Agreement only to cure any ambiguity, defect or
inconsistency, to shorten or lengthen any time period, or to make changes that
do not adversely affect the interests of Rights holders (excluding the interests
of an Acquiring Person, an Adverse Person or their associates or affiliates). In
addition, the Board of Directors may at any time prior to such time as any
person becomes an Acquiring Person amend the Rights Agreement to lower the
threshold at which a person becomes an Acquiring Person to not less than the
greater of (i) the sum of .001% and the largest percentage of the outstanding
Common Stock then owned by any person and (ii) 10%.

         Until a Right is exercised, the holder will have no rights as a
stockholder of the Company (beyond those as an existing stockholder), including
the right to vote or to receive dividends. While the distribution of the Rights
will not be taxable to stockholders or to the Company, stockholders may,
depending upon the circumstances, recognize taxable income in the event that the
Rights become exercisable for Units, other securities of the Company, other
consideration or for common stock of an acquiring company.

                                        5

<PAGE>   6



         The certificate of vote of directors establishing the Preferred Stock
and the form of Right Certificate are attached as Exhibits A and B,
respectively, to the Rights Agreement (which is included as Exhibit 1 to this
Form 8-A). The foregoing description of the Rights does not purport to be
complete and is qualified in its entirety by reference to the Rights Agreement
which is incorporated herein by reference.

ITEM 2 - EXHIBITS

Exhibit 1         Amended and Restated Shareholder Rights Agreement, dated
                  November 26, 1997, between Medford Bancorp, Inc. and Medford
                  Savings Bank and State Street Bank and Trust Company, as
                  Rights Agent.

                                        6

<PAGE>   7




                                    SIGNATURE


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


                                         MEDFORD BANCORP, INC.



Date: November 26, 1997              By: /s/ Arthur H. Meehan
                                         ---------------------------------
                                         Arthur H. Meehan
                                         Chairman, President and Chief Executive
                                         Officer






<PAGE>   8


                                  EXHIBIT INDEX


EXHIBIT NO.                             DESCRIPTION
- -----------                             -----------

    1             Amended and Restated Shareholder Rights Agreement, dated
                  November 26, 1997, between Medford Bancorp, Inc. and Medford
                  Savings Bank and State Street Bank and Trust Company, as
                  Rights Agent.



















<PAGE>   1
                                                                   
- --------------------------------------------------------------------------------










                              MEDFORD BANCORP, INC.

                                       and

                              MEDFORD SAVINGS BANK

                                       and

                      STATE STREET BANK AND TRUST COMPANY,

                                 as Rights Agent




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






                Amended and Restated Shareholder Rights Agreement

                          Dated as of November 26, 1997



















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



<PAGE>   2



                                TABLE OF CONTENTS


<TABLE>
<CAPTION>

Section                                                                                                Page
- -------                                                                                                ----
<S>                                                                                                    <C>

1.  Certain Definitions...................................................................................2

2.  Amendment and Restatement of the Original Rights Agreement; Appointment of Rights
       Agent..............................................................................................6

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

4.  Form of Right Certificates............................................................................9

5.  Countersignature and Registration....................................................................10

6.  Transfer, Split Up, Combination and Exchange of Right Certificates; Mutilated, Destroyed,
       Lost or Stolen Right Certificates.................................................................11

7.  Exercise of Rights; Exercise Price; Expiration Date of Rights........................................12

8.  Cancellation and Destruction of Right Certificates...................................................14

9.  Reservation and Availability of Preferred Stock......................................................14

10. Preferred Stock Record Date..........................................................................16

11. Adjustment of Exercise Price, Number and Kind of Shares or Number of Rights..........................16

12. Certificate of Adjusted Exercise Price or Number of Shares...........................................25

13. Consolidation, Merger or Sale or Transfer of Assets or Earning Power.................................25

14. Fractional Rights and Fractional Shares..............................................................29

15. Rights of Action.....................................................................................29

16. Agreement of Right Holders...........................................................................30

17. Right Certificate Holder Not Deemed a Shareholder....................................................30

18. Concerning the Rights Agent..........................................................................31

19. Merger or Consolidation or Change of Name of Rights Agent............................................31
</TABLE>


                                       (i)

<PAGE>   3


<TABLE>
<S>                                                                                                    <C>

20.  Duties of Rights Agent..............................................................................32

21.  Change of Rights Agent..............................................................................34

22.  Issuance of New Right Certificates..................................................................35

23.  Redemption..........................................................................................35

24.  Exchange............................................................................................36

25.  Notice of Certain Events............................................................................38

26.  Notices.............................................................................................39

27.  Supplements and Amendments..........................................................................40

28.  Successors..........................................................................................41

29.  Determinations and Actions by the Board of Directors................................................41

30.  Benefits of this Agreement..........................................................................41

31.  Severability........................................................................................41

32.  Governing Law.......................................................................................42

33.  Counterparts........................................................................................42

34.  Descriptive Headings................................................................................42


Exhibit A --   Certificate of Designation of
                  Series A Junior Participating
                  Cumulative Preferred Stock

Exhibit B --   Form of Right Certificate
</TABLE>



                                      (ii)

<PAGE>   4



                AMENDED AND RESTATED SHAREHOLDER RIGHTS AGREEMENT


         Amended and Restated Agreement (the "Agreement"), dated as of
November 26, 1997, among Medford Bancorp, Inc., a Massachusetts corporation (the
"Company"), Medford Savings Bank, a Massachusetts savings bank (the "Bank"), and
State Street Bank and Trust Company, a Massachusetts trust company (the "Rights
Agent").


                               W I T N E S S E T H

         WHEREAS, the Bank and the Rights Agent entered into a Shareholder
Rights Agreement, dated as of September 22, 1993 (the "Original Rights
Agreement"), pursuant to which, among other things, the Board of Directors of
the Bank authorized and declared a dividend distribution of one Right (as
defined in the Original Rights Agreement and hereinafter referred to as a "Bank
Right")) per share of Common Stock, par value $.50 per share, of the Bank ("Bank
Common Stock") outstanding as of the close of business on October 8, 1993 (the
"Record Date"), to then holders of outstanding shares of Bank Common Stock; and

         WHEREAS, the Bank and the Company entered into a Plan of Reorganization
and Acquisition (the "Plan of Reorganization"), dated July 29, 1997, duly
approved by the holders of Bank Common Stock at a meeting held on September 16,
1997, pursuant to which the Bank became a wholly-owned subsidiary of the Company
and shares of Bank Common Stock (together with associated preferred stock
purchase rights (i.e., the Bank Rights)), except those held by stockholders
exercising dissenters' rights, were converted and exchanged into an equal number
of shares of Common Stock (as hereinafter defined) (together with associated
preferred stock purchase rights (i.e., the Rights are hereinafter defined)); and

         WHEREAS, the Board of Directors of the Company desires to provide
shareholders of the Company with the continued opportunity to benefit from the
long-term prospects and value of the Company and to ensure that shareholders of
the Company receive fair and equal treatment in the event of any proposed
takeover of the Company; and

         WHEREAS, in accordance with the Plan of Reorganization, the Board of
Directors of the Company has determined that it is in the best interests of the
shareholders of the Company to amend and restate the Original Rights Agreement
in its entirety to, among other things, confirm that the Bank Rights issued
pursuant to the Original Rights Agreement have been converted to equivalent
preferred stock purchase rights (the "Rights") with respect to the Common Stock;
and

         WHEREAS, on November 25, 1997, the Boards of Directors of the Bank and
the Company adopted resolutions confirming the conversion of the Bank Rights to
the Rights concurrently with the conversion and exchange of Bank Common Stock
for the Common Stock; and




<PAGE>   5

         WHEREAS, the Company desires to appoint the Rights Agent to act as
rights agent hereunder, in accordance with the terms and conditions hereof;

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

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

                (a)   "ACQUIRING PERSON" shall mean any Person (as hereinafter
defined) who or which, together with all Affiliates (as such term is hereinafter
defined) and Associates (as such term is hereinafter defined) of such Person,
shall be the Beneficial Owner (as such term is hereinafter defined) of 15% or
more of the shares of Common Stock of the Company then outstanding, but shall
not include (i) the Company, (ii) any Subsidiary (as such term is hereinafter
defined) of the Company, (iii) any employee benefit plan or compensation
arrangement of the Company or any Subsidiary of the Company or (iv) any Person
holding shares of Common Stock of the Company organized, appointed or
established by the Company or any Subsidiary of the Company for or pursuant to
the terms of any such employee benefit plan or compensation arrangement (the
Persons described in clauses (i) through (iv) above are referred to herein as
"Exempt Persons").

         Notwithstanding the foregoing, no Person shall become an "Acquiring
Person" as the result of an acquisition of the Company's Common Stock 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 shares of Common Stock of the Company then outstanding; PROVIDED,
HOWEVER, that if a Person shall become the Beneficial Owner of 15% or more of
the shares of Common Stock of the Company then outstanding by reason of share
purchases by the Company and shall, after such share purchases by the Company,
become the Beneficial Owner of any additional shares (other than pursuant to a
stock split, stock dividend or similar transaction) of Common Stock of the
Company and immediately thereafter be the Beneficial Owner of 15% or more of the
shares of Common Stock of the Company then outstanding, then such Person shall
be deemed to be an "Acquiring Person."

         In addition, notwithstanding the foregoing, a Person shall not be an
"Acquiring Person" if the Board of Directors of the Company determines that a
Person who would otherwise be an "Acquiring Person," as defined pursuant to the
foregoing provisions of this Section 1(a), has become such inadvertently, and
such Person divests as promptly as practicable (or within such period of time as
the Board of Directors determines is reasonable) a sufficient number of shares
of Common Stock of the Company so that such Person would no longer be an
"Acquiring Person," as defined pursuant to the foregoing provisions of this
Section 1(a).

                (b)   "ADJUSTMENT SHARES" shall have the meaning set forth in
Section 11(a)(iii) hereof.


                                        2

<PAGE>   6



                (c)   "ADVERSE PERSON" shall mean any Person declared to be an
Adverse Person by the Board of Directors upon a determination of the Board of
Directors that the criteria set forth in Section 11(a)(ii)(B) apply to such
Person.

                (d)   "AFFILIATE" and "ASSOCIATE" shall have the respective
meanings ascribed to such terms in Rule 12b-2 of the General Rules and
Regulations (the "Rules") under the Securities Exchange Act of 1934, as amended
(the "Exchange Act"), as in effect on the date of this Agreement; PROVIDED,
HOWEVER, that no Person who is a director or officer of the Company shall be
deemed an Affiliate or an Associate of any other director or officer of the
Company solely as a result of his or her position as director or officer of the
Company.

                (e)   A Person shall be deemed the "BENEFICIAL OWNER" of, and
shall be deemed to "BENEFICIALLY OWN," any securities:

                      (i)   which such Person or any of such Person's Affiliates
         or Associates, directly or indirectly, beneficially owns (as determined
         pursuant to Rule 13d-3 of the Rules under the Exchange Act, as in
         effect on the date of this Agreement);

                      (ii)  which such Person or any of such Person's Affiliates
         or Associates, directly or indirectly, has:

                            (A)   the right to acquire (whether such right is
                exercisable immediately or only after the passage of time or
                upon the satisfaction of any conditions or both) pursuant to any
                agreement, arrangement or understanding (whether or not in
                writing) (other than customary agreements with and between
                underwriters and selling group members with respect to a bona
                fide public offering of securities) or upon the exercise of
                conversion rights, exchange rights, rights (other than the
                Rights), warrants or options, or otherwise; PROVIDED, HOWEVER,
                that a Person shall not be deemed the "Beneficial Owner" of, or
                to "beneficially own," (1) securities tendered pursuant to a
                tender or exchange offer made by or on behalf of such Person or
                any of such Person's Affiliates or Associates until such
                tendered securities are accepted for purchase or exchange; (2)
                securities issuable upon exercise of these Rights at any time
                prior to the occurrence of a Triggering Event; or (3) securities
                issuable upon exercise of Rights from and after the occurrence
                of a Triggering Event, which Rights were acquired by such Person
                or any of such Person's Affiliates or Associates prior to the
                Distribution Date or pursuant to Sections 3(a), 11(i) or 22
                hereof; or

                            (B)   the right to vote pursuant to any agreement,
                arrangement or understanding (whether or not in writing);
                PROVIDED, HOWEVER, that a Person shall not be deemed the
                "Beneficial Owner" of, or to "beneficially own," any security
                under this clause (B) if the agreement, arrangement or
                understanding to vote such security (1) arises solely from a
                revocable proxy given in response to

                                        3

<PAGE>   7



                a public proxy or consent solicitation made pursuant to, and in
                accordance with, the Rules of the Exchange Act and (2) is not
                also then reportable by such person on Schedule 13D under the
                Exchange Act (or any comparable or successor report); or

                            (C)   the right to dispose of pursuant to any
                agreement, arrangement or understanding (whether or not in
                writing) (other than customary arrangements with and between
                underwriters and selling group members with respect to a bona
                fide public offering of securities); or

                      (iii) which are beneficially owned, directly or
         indirectly, by any other Person (or any Affiliate or Associate thereof)
         with which such Person or any of such Person's Affiliates or Associates
         has any agreement, arrangement or understanding (whether or not in
         writing) (other than customary agreements with and between underwriters
         and selling group members with respect to a bona fide public offering
         of securities) for the purpose of acquiring, holding, voting (except
         pursuant to a revocable proxy as described in clause (B) of Section
         1(d)(ii) hereof) or disposing of any securities of the Company;

PROVIDED, HOWEVER, that (1) no Person engaged in business as an underwriter of
securities shall be deemed the Beneficial Owner of any securities acquired
through such Person's participation as an underwriter in good faith in a firm
commitment underwriting until the expiration of forty (40) days after the date
of such acquisition, and (2) no Person who is a director or an officer of the
Company shall be deemed, as a result of his or her position as director or
officer of the Company, the Beneficial Owner of any securities of the Company
that are beneficially owned by any other director or officer of the Company.

                (f)   "BUSINESS DAY" shall mean any day other than a Saturday,
Sunday, or a day on which banking institutions in the State of Massachusetts are
authorized or obligated by law or executive order to close.

                (g)   "CLOSE OF BUSINESS" on any given date shall mean
5:00 P.M., Boston, Massachusetts time, on such date; PROVIDED, HOWEVER, that if
such date is not a Business Day it shall mean 5:00 P.M., Boston, Massachusetts
time, on the next succeeding Business Day.

                (h)   "COMMON STOCK" when used in reference to the Company shall
mean the common stock, par value $.50 per share, of the Company or any other
shares of capital stock of the Company into which such stock shall be
reclassified or changed. "Common Stock" when used with reference to any Person
other than the Company organized in corporate form shall mean (i) the capital
stock or other equity interest of such Person with the greatest voting power,
(ii) the equity securities or other equity interest having power to control or
direct the management of such Person or (iii) if such Person is a Subsidiary of
another Person, the Person or Persons which ultimately control such
first-mentioned Person and which have issued any such outstanding capital stock,
equity securities or equity interest. "Common Stock" when

                                        4

<PAGE>   8



used with reference to any Person not organized in corporate form shall mean
units of beneficial interest which shall be entitled to exercise the greatest
voting power of such Person or, in the case of a limited partnership, shall have
the power to remove or otherwise replace the general partner or partners.

                (i)   "CURRENT VALUE" shall have the meaning set forth in
Section 11(a)(iii) hereof.

                (j)   "DEPOSITARY AGENT" shall have the meaning set forth in
Section 7(c) hereof.

                (k)   "DISTRIBUTION DATE" shall have the meaning defined in
Section 3(a) hereof.

                (l)   "EXERCISE PRICE" shall have the meaning defined in Section
4(a) hereof.

                (m)   "EXPIRATION DATE" and "FINAL EXPIRATION DATE" shall have
the meanings set forth in Section 7(a) hereof.

                (n)   "FAIR MARKET VALUE" of any securities or other property
shall be as determined in accordance with Section 11(d) hereof.

                (o)   "GROUP" shall have the meaning set forth in clause (b) of
the definition of "Person."

                (p)   "PERSON" shall mean (a) an individual, a corporation, a
partnership, an association, a joint stock company, a trust, a business trust, a
government or political subdivision, any unincorporated organization, or any
other association or entity, or (b) a "group" as that term is used for purposes
of Section 13(d)(3) of the Securities Exchange Act of 1934, as amended (any such
group under this Clause (b), a "Group").

                (q)   "PREFERRED STOCK" shall mean shares of Series A Junior
Participating Cumulative Preferred Stock, par value $.50 per share, of the
Company having the rights and preferences set forth in the form of Certificate
of Designation attached hereto as EXHIBIT A.

                (r)   "PREFERRED STOCK EQUIVALENTS" shall have the meaning set
forth in Section 11(b) hereof.

                (s)   "PRINCIPAL PARTY" shall have the meaning defined in
Section 13(b) hereof.

                (t)   "REDEMPTION PRICE" shall have the meaning defined in
Section 23 hereof.

                (u)   "REGISTERED COMMON STOCK" shall have the meaning set forth
in Section 13(b) hereof.

                                        5

<PAGE>   9



                (v)   "RIGHT CERTIFICATE" shall have the meaning set forth in
Section 3(a) hereof.

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

                (x)   "SECTION 11(a)(II) TRIGGER DATE" shall have the meaning
set forth in Section 11(a)(ii) hereof.

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

                (z)   "SECTION 24(a)(I) EXCHANGE RATIO" shall have the meaning
set forth in Section 24(a)(i) hereof.

                (aa)  "SECTION 24(a)(II) EXCHANGE RATIO" shall have the meaning
set forth in Section 24(a)(ii) hereof.

                (bb)  "SPREAD" shall have then meaning set forth in
Section 11(a)(iii) hereof.

                (cc)  "STOCK ACQUISITION DATE" shall mean the date of the first
public announcement (which for purposes of this definition shall include,
without limitation, the issuance of a press release or the filing of a
publicly-available report or other document with the Securities and Exchange
Commission or any other governmental agency) by the Company or an Acquiring
Person that an Acquiring Person has become such.

                (dd)  "SUBSIDIARY" shall mean, with reference to any Person, any
corporation or other entity of which securities or other ownership interest
having ordinary voting power sufficient, in the absence of contingencies, to
elect a majority of the board of directors or other persons performing similar
functions of such corporation or other entity are at the time directly or
indirectly beneficially owned or otherwise controlled by such Person and any
Affiliate of such Person.

                (ee)  "SUBSTITUTION PERIOD" shall have the meaning set forth in
Section 11(a)(iii) hereof.

                (ff)  "TRIGGERING EVENT" shall mean any Section 11(a)(ii) Event
or any Section 13 Event.

         Section 2. AMENDMENT AND RESTATEMENT OF THE ORIGINAL RIGHTS AGREEMENT;
APPOINTMENT OF RIGHTS AGENT.

                (a)   The Original Rights Agreement is hereby amended and
restated in its entirety by this Agreement and in connection therewith all Bank
Rights issued pursuant to the

                                        6

<PAGE>   10



Original Rights Agreement are deemed to be automatically converted to Rights as
of the date hereof without further action and no holder of any such Bank Rights
shall have any rights whatsoever with respect to such Bank Rights, whether under
any provision of this Agreement or otherwise.

                (b)   The Company hereby appoints the Rights Agent to act as
agent for the Company and the holders of the Rights (who, in accordance with
Section 3 hereof, shall prior to the Distribution Date (as hereinafter defined
in Section 3(a)) also be the holders of the Common Stock of 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. In the event the Company
appoints one or more Co-Rights Agents, the respective duties of the Rights Agent
and any Co- Rights Agents shall be as the Company shall determine. The Company
shall give 10 days prior written notice to the Rights Agent of the appointment
of one or more Co-Rights Agents and the respective duties of the Rights Agent
and any such Co-Rights Agents. The Rights Agent shall have no duty to supervise,
and in no event shall be liable for, the acts or omissions of any such Co-Rights
Agents.

         Section 3. ISSUE OF RIGHT CERTIFICATES.

                (a)   From the date hereof until the earlier of (i) the Close of
Business on the tenth calendar day after the Stock Acquisition Date, (ii) the
Close of Business on the tenth Business Day (or such other calendar day, if any,
as the Board of Directors may determine in its sole discretion) after the date a
tender or exchange offer by any Person, other than an Exempt Person, is first
published or sent or given within the meaning of Rule 14d-4(a) of the Exchange
Act, or any successor rule, if, upon consummation thereof, such Person would be
the Beneficial Owner of 15% or more of the shares of Common Stock of the Company
then outstanding or (iii) the determination by the Board of Directors of the
Company, pursuant to the criteria set forth in Section 11(a)(ii)(B) hereof, that
a Person is an Adverse Person (including any such date which is after the date
of this Agreement and prior to the issuance of the Rights) (the earliest of such
dates being herein referred to as the "Distribution Date"), (x) the Rights will
be evidenced (subject to the provisions of Section 3(b) hereof) by the
certificates for the Common Stock of the Company registered in the names of the
holders of the Common Stock of the Company (which certificates for Common Stock
of the Company shall be deemed also to be certificates for Rights) and not by
separate certificates, and (y) the Rights will be transferable only in
connection with the transfer of the underlying shares of Common Stock of the
Company. As soon as practicable after the Distribution Date, the Rights Agent
will, at the Company's expense send, by first-class, insured, postage prepaid
mail, to each record holder of the Common Stock of the Company as of the Close
of Business on the Distribution Date, at the address of such holder shown on the
records of the Company, one or more certificates, in substantially the form of
EXHIBIT B hereto (the "Right Certificates"), evidencing one Right for each share
of Common Stock of the Company so held, subject to adjustment as provided
herein. In the event that an adjustment in the number of Rights per share of
Common Stock of the Company has been made pursuant to Section 11(o) hereof, the

                                        7

<PAGE>   11



Company may make the necessary and appropriate rounding adjustments (in
accordance with Section 14(a) hereof) at the time of distribution of the Right
Certificates, so that Right Certificates representing only whole numbers of
Rights are distributed and cash is paid in lieu of any fractional Rights. As of
and after the Close of Business on the Distribution Date, the Rights will be
evidenced solely by such Right Certificates.

                (b)   With respect to certificates for the Common Stock of the
Company issued prior to the Close of Business on the Record Date, the Rights
will be evidenced by such certificates for the Common Stock of the Company on or
until the Distribution Date (or the earlier redemption, expiration or
termination of the Rights), and the registered holders of the Common Stock of
the Company also shall be the registered holders of the associated Rights. Until
the Distribution Date (or the earlier redemption, expiration or termination of
the Rights), the transfer of any of the certificates for the Common Stock of the
Company outstanding prior to the date of this Agreement shall also constitute
the transfer of the Rights associated with the Common Stock of the Company
represented by such certificate.

                (c)   Certificates for the Common Stock of the Company issued
after the Record Date, but prior to the earlier of the Distribution Date or the
redemption, expiration or termination of the Rights, shall be deemed also to be
certificates for Rights, and shall bear a legend, substantially in the form set
forth below:

                This certificate also evidences and entitles the holder hereof
                to certain Rights as set forth in an Amended and Restated
                Shareholder Rights Agreement among Medford Bancorp, Inc.,
                Medford Savings Bank, and State Street Bank and Trust Company,
                as Rights Agent, dated as of November 26, 1997, as amended,
                restated, renewed or extended 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
                offices of Medford Bancorp, Inc. and the stock transfer
                administration office of the Rights Agent. 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. Medford Bancorp, Inc. may redeem
                the Rights at a redemption price of $.01 per Right, subject to
                adjustment, under the terms of the Rights Agreement. Medford
                Bancorp, Inc. will mail to the holder of this certificate a copy
                of the Rights Agreement, as in effect on the date of mailing,
                without charge promptly after receipt of a written request
                therefor. Under certain circumstances, Rights issued to or held
                by Acquiring Persons, Adverse Persons or any Affiliates or
                Associates thereof (as defined in the Rights Agreement), and any
                subsequent holder of such Rights, may become null and void. The
                Rights shall not be exercisable, and shall be void so long as

                                        8

<PAGE>   12



                held, by a holder in any jurisdiction where the requisite
                qualification, if any, to the issuance to such holder, or the
                exercise by such holder, of the Rights in such jurisdiction
                shall not have been obtained or be obtainable.

With respect to such certificates containing the foregoing legend, the Rights
associated with the Common Stock of the Company represented by such certificates
shall be evidenced by such certificates alone until the Distribution Date (or
the earlier redemption, expiration or termination of the Rights), and the
transfer of any of such certificates shall also constitute the transfer of the
Rights associated with the Common Stock of the Company represented by such
certificates. In the event that the Company purchases or acquires any shares of
Common Stock of the Company after the Record Date but prior to the Distribution
Date, any Rights associated with such Common Stock of the Company shall be
deemed canceled and retired so that the Company shall not be entitled to
exercise any Rights associated with the shares of Common Stock of the Company
which are no longer outstanding. The failure to print the foregoing legend on
any such certificate representing Common Stock of the Company or any defect
therein shall not affect in any manner whatsoever the application or
interpretation of the provisions of Section 7(e) hereof.

         Section 4. FORM OF RIGHT CERTIFICATES.

                (a)   The Right Certificates (and the forms of election to
purchase shares and of assignment and certificate to be printed on the reverse
thereof) shall each be substantially in the form of 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 Agreement, or as may be required to
comply with any applicable law, rule or regulation 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 customary usage. The Rights Certificates shall be in a
machine printable format and in a form reasonably satisfactory to the Rights
Agent. Subject to the provisions of Section 11 and Section 22 hereof, the Right
Certificates, whenever distributed, shall be dated as of the Record Date, shall
show the date of countersignature, and on their face shall entitle the holders
thereof to purchase such number of one one-hundredths of a share of Preferred
Stock as shall be set forth therein at the price set forth therein (the
"Exercise Price"), but the number of such shares and the Exercise 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 beneficially owned by (i) an Acquiring
Person, an Adverse Person or any Associate or Affiliate of an Acquiring Person
or an Adverse Person, (ii) a transferee of an Acquiring Person or an Adverse
Person (or of any Associate or Affiliate of an Acquiring Person or an Adverse
Person) who becomes a transferee after the Acquiring Person or Adverse Person
becomes such, or (iii) a transferee of an Acquiring Person or an Adverse Person
(or of any such Associate or Affiliate) who becomes a transferee prior to or
concurrently with the Acquiring Person or Adverse Person becoming such and
receives such

                                        9

<PAGE>   13



Rights pursuant to either (A) a transfer (whether or not for consideration) from
the Acquiring Person or Adverse Person to holders of equity interests in such
Acquiring Person or Adverse Person or to any Person with whom the Acquiring
Person or Adverse Person has any continuing agreement, arrangement or
understanding (whether or not in writing) regarding the transferred Rights, the
shares of Common Stock of the Company associated with such Rights or the Company
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 Section 7(e) hereof, and any Right Certificate issued
pursuant to Section 6, Section 11 or Section 22 upon transfer, exchange,
replacement or adjustment of any other Right Certificate referred to in this
sentence, shall have deleted therefrom the second sentence of the existing
legend on such Right Certificate and in substitution therefor shall contain 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, an Adverse Person or an Affiliate or an Associate of an
                Acquiring Person or an Adverse Person (as such terms are defined
                in the Rights Agreement). This Right Certificate and the Rights
                represented hereby may become null and void under certain
                circumstances as specified in Section 7(e) of the Rights
                Agreement.

The Company shall give notice to the Rights Agent promptly after it becomes
aware of the existence and identity of any Acquiring Person or Adverse Person or
any Associate or Affiliate thereof. The Company shall instruct the Rights Agent
in writing of the Rights which should be so legended. The failure to print the
foregoing legend on any such Right Certificate or any defect therein shall not
affect in any manner whatsoever the application or interpretation of the
provisions of Section 7(e) hereof.

         Section 5. COUNTERSIGNATURE AND REGISTRATION.

                (a)   The Right Certificates shall be executed on behalf of the
Company by its Chairman of the Board of Directors, or its President or any Vice
President and by its Treasurer or any Assistant Treasurer, or by its Secretary
or any Assistant Secretary, either manually or by facsimile signature, and shall
have affixed thereto the Company's seal or a facsimile thereof which shall be
attested to by the Secretary or any Assistant Secretary of the Company, either
manually or by facsimile signature. The Right Certificates shall be manually
countersigned by an authorized signatory of the Rights Agent and shall not be
valid for any purpose unless so countersigned, and such countersignature upon
any Right Certificate shall be conclusive evidence, and the only evidence, that
such Right Certificate has been duly countersigned as required hereunder. 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 an authorized
signatory of the Rights Agent, and issued and delivered

                                       10

<PAGE>   14



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 Certificates may be signed on behalf of the Company by any person who,
at the actual date of the execution of such Right Certificate, shall be a proper
officer of the Company to sign such Right Certificate, although at the date of
the execution of this Rights Agreement any such person was not such an officer.

                (b)   Following the Distribution Date, the Rights Agent will
keep or cause to be kept, at one of its offices designated as the appropriate
place for surrender of Right Certificates upon exercise or transfer, 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.

                (a)   Subject to the provisions of Section 4(b), Section 7(e)
and Section 14 hereof, at any time after the Close of Business on the
Distribution Date, and at or prior to the Close of Business on the Expiration
Date, any Right Certificate or Certificates may be transferred, split up,
combined or exchanged for another Right Certificate or Certificates, entitling
the registered holder to purchase a like number of one one-hundredths of a share
of Preferred Stock (or following a Triggering Event, preferred stock, cash,
property, debt securities, Common Stock of the Company or any combination
thereof) as the Right Certificate or Certificates surrendered then entitled such
holder to purchase and at the same Exercise Price. Any registered holder
desiring to transfer, split up, combine or exchange any Right Certificate shall
make such request in writing delivered to the Rights Agent, and shall surrender
the Right Certificate or Certificates to be transferred, split up, combined or
exchanged, with the form of assignment and certificate duly executed, at the
office or offices of the Rights Agent designated for such purpose. Neither the
Rights Agent nor the Company shall be obligated to take any action whatsoever
with respect to the transfer of any such surrendered 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
4(b), Section 7(e) and Section 14 hereof, countersign and deliver to the Person
entitled thereto a Right Certificate or Certificates, as the case may be, as so
requested. The Company may require payment by the registered holder of a Right
Certificate, 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.

                (b)   Upon receipt by the Company and the Rights Agent of
evidence reasonably satisfactory to them of the loss, theft, destruction or
mutilation of a Right

                                       11

<PAGE>   15



Certificate, and, in case of loss, theft or destruction, of indemnity or
security satisfactory to them, and reimbursement to the Company and the Rights
Agent of all reasonable expenses incidental thereto, and upon surrender to the
Rights Agent and cancellation of the Right Certificate, if mutilated, the
Company will execute and deliver a new Right Certificate of like tenor to the
Rights Agent for countersignature and delivery to the registered owner in lieu
of the Right Certificate so lost, stolen, destroyed or mutilated.

         Section 7. EXERCISE OF RIGHTS; EXERCISE PRICE; EXPIRATION DATE OF
RIGHTS.

                (a)   Subject to Section 7(e) hereof, 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 and the certificate on the reverse side thereof duly
executed, to the Rights Agent at the office or offices of the Rights Agent
designated for such purpose, together with payment of the aggregate Exercise
Price for the total number of one one-hundredths of a share of Preferred Stock
(or other securities, cash or other assets, as the case may be) as to which such
surrendered Rights are then exercised, at or prior to the earlier of (i) the
Close of Business on September 22, 2003 (the "Final Expiration Date"), (ii) the
time at which the Rights are redeemed as provided in Section 23 hereof or (iii)
the time at which such Rights are exchanged as provided in Section 24 hereof
(the earlier of (i), (ii) or (iii) being herein referred to as the "Expiration
Date"). Except as set forth in Section 7(e) hereof and notwithstanding any other
provision of this Agreement, any Person who prior to the Distribution Date
becomes a record holder of shares of Common Stock of the Company may exercise
all of the rights of a registered holder of a Right Certificate with respect to
the Rights associated with such shares of Common Stock of the Company in
accordance with the provisions of this Agreement, as of the date such Person
becomes a record holder of shares of Common Stock of the Company.

                (b)   The Exercise Price for each one one-hundredth of a share
of Preferred Stock pursuant to the exercise of a Right shall initially be ninety
dollars ($90.00), shall be subject to adjustment from time to time as provided
in Section 11 and Section 13 hereof and shall be payable in lawful money of the
United States of America in accordance with Section 7(c) below.

                (c)   As promptly as practicable following the Distribution
Date, the Company shall deposit with a corporation, trust, bank or similar
institution in good standing organized under the laws of the United States or
any 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 a federal or state authority (such institution is hereinafter
referred to as the "Depositary Agent"), certificates representing the shares of
Preferred Stock that may be acquired upon exercise of the Rights and the Company
shall cause such Depositary Agent to enter into an agreement pursuant to which
the Depositary Agent shall issue receipts representing interests in the shares
of Preferred Stock so deposited. Upon receipt of a Right Certificate
representing exercisable Rights, with the form of election to purchase and the

                                       12

<PAGE>   16



certificate on the reverse side thereof duly executed, accompanied by payment of
the Exercise Price for the shares to be purchased and an amount equal to any
applicable transfer tax (as determined by the Rights Agent) in cash, or by
certified check or bank draft payable to the order of the Company, the Rights
Agent shall, subject to Section 20(k) hereof, thereupon promptly (i) requisition
from the Depositary Agent (or make available, if the Rights Agent is the
Depositary Agent) depositary receipts or certificates for the number of one
one-hundredths of a share of Preferred Stock to be purchased and the Company
hereby irrevocably authorizes the Depositary Agent to comply with all such
requests, (ii) when appropriate, requisition from the Company the amount of
cash, if any, to be paid in lieu of issuance of fractional shares in accordance
with Section 14 hereof, (iii) promptly after receipt of such certificates or
depositary receipts, cause the same to be delivered to or upon the order of the
registered holder of such Right Certificate, registered in such name or names as
may be designated by such holder and (iv) when appropriate, after receipt
promptly 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 other
securities (including Common Stock) of the Company, pay cash or distribute other
property pursuant to Section 11(a) hereof, the Company will make all
arrangements necessary so that such other securities, cash or other property are
available for distribution by the Rights Agent, if and when appropriate. The
payment of the Exercise Price may be made in cash or by certified or bank check
payable to the order of the Company, or by wire transfer of immediately
available funds to the account of the Company (provided that notice of such wire
transfer shall be given by the holder of the related Right to the Rights Agent).

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

                (e)   Notwithstanding anything in this Agreement to the
contrary, from and after the first occurrence of a Section 11(a)(ii) Event or
Section 13 Event, any Rights beneficially owned by (i) an Acquiring Person, an
Adverse Person or any Associate or Affiliate of an Acquiring Person or an
Adverse Person, (ii) a transferee of an Acquiring Person or an Adverse Person
(or of any Associate or Affiliate of an Acquiring Person or an Adverse Person)
who becomes a transferee after the Acquiring Person or Adverse Person becomes
such or (iii) a transferee of an Acquiring Person or an Adverse Person (or of
any Associate or Affiliate of an Acquiring Person or an Adverse Person) who
becomes a transferee prior to or concurrently with the Acquiring Person or
Adverse Person becoming such and receives such Rights pursuant to either (A) a
transfer (whether or not for consideration) from the Acquiring Person or Adverse
Person to holders of equity interests in such Acquiring Person or Adverse Person
or to any Person with whom the Acquiring Person or Adverse Person has any
continuing agreement, arrangement or understanding regarding the transferred
Rights, the shares of Common Stock of the Company associated with such Rights or
the Company, 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

                                       13

<PAGE>   17



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

                (f)   Notwithstanding anything in this Agreement to the
contrary, neither the Rights Agent nor the Company shall be obligated to
undertake any action with respect to a registered holder of Rights upon the
occurrence of any purported exercise as set forth in this Section 7 unless such
registered holder shall have (i) completed and signed the certificate contained
in the form of election to purchase set forth on the reverse side of the Right
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 any of its
agents, be delivered to the Rights Agent for cancellation or in canceled form,
or, if surrendered to the Rights Agent, shall be canceled by it, and no 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.

         Section 9. RESERVATION AND AVAILABILITY OF PREFERRED STOCK.

                (a)   The Company covenants and agrees that it will cause to be
reserved and kept available out of its authorized and unissued shares of
Preferred Stock or any authorized and issued shares of Preferred Stock held in
its treasury, the number of shares of Preferred Stock that will be sufficient to
permit the exercise in full of all outstanding and exercisable Rights. Upon the
occurrence of any events resulting in an increase in the aggregate number of
shares of Preferred Stock issuable upon exercise of all outstanding Rights in
excess of the number then reserved, the Company shall make appropriate increases
in the number of shares so reserved.

                (b) The Company shall use its best efforts to cause, from and
after such time as the Rights become exercisable, all shares of Preferred Stock
issued or reserved for issuance to be listed, upon official notice of issuance,
upon the principal national securities exchange, if any, upon which the Common
Stock of the Company is listed or, if the principal market for the Common Stock
of the Company is not on any national securities exchange, to be eligible for

                                       14

<PAGE>   18



quotation on the National Association of Securities Dealers Automated Quotation
System ("NASDAQ") or any successor thereto or other comparable quotation system.

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

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

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


                                       15

<PAGE>   19



         Section 10. PREFERRED STOCK RECORD DATE. Each Person in whose name any
certificate for Preferred Stock (including any fraction of a share of Preferred
Stock) is issued upon the exercise of Rights shall for all purposes be deemed to
have become the holder of record of the shares of Preferred Stock represented
thereby on, and such certificate shall be dated, the date upon which the Right
Certificate evidencing such Rights was duly surrendered and payment of the
Exercise 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 Stock 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 Stock
transfer books of the Company are open; and further PROVIDED, HOWEVER, that if
delivery of shares of Preferred Stock is delayed pursuant to Section 9(c), such
Person shall be deemed to have become the record holder of such shares of
Preferred Stock only when such shares first become deliverable. Prior to the
exercise of the Right evidenced thereby, the holder of a Right Certificate shall
not be entitled to any rights of a shareholder of the Company with respect to
shares for which the Rights shall be exercisable, including, without limitation,
the right to vote, to receive dividends or other distributions or to exercise
any preemptive rights, and shall not be entitled to receive any notice of any
proceedings of the Company, except as provided herein.

         Section 11. ADJUSTMENT OF EXERCISE PRICE, NUMBER AND KIND OF SHARES OR
NUMBER OF RIGHTS. The Exercise Price, the number and kind of shares covered by
each Right and the number of Rights outstanding are subject to adjustment from
time to time as provided in this Section 11.

                (a)   (i)   In the event the Company shall at any time after the
date of this Agreement (A) declare a dividend on the Preferred Stock payable in
shares of Preferred Stock, (B) subdivide the outstanding Preferred Stock, (C)
combine the outstanding Preferred Stock into a smaller number of shares or (D)
issue any shares of its capital stock in a reclassification of the Preferred
Stock (including any such reclassification in connection with a consolidation or
merger in which the Company is the continuing or surviving corporation), except
as otherwise provided in this Section 11(a) and Section 7(e) hereof, the
Exercise 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 Stock 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 a Right be less than the aggregate par value of the
shares of capital stock of the Company issuable upon exercise of a 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.

                                       16

<PAGE>   20



                      (ii)  Subject to the provisions of Section 24 hereof, in
                the event

                            (A)   any Person, alone or together with its
                Affiliates and Associates, shall become an Acquiring Person, or

                            (B)   the Board of Directors of the Company, by
                majority vote, shall declare any Person to be an Adverse Person,
                after (x) a determination that such Person, alone or together
                with its Affiliates and Associates, has become the Beneficial
                Owner of 10% or more of the outstanding shares of Common Stock
                of the Company and (y) a determination by the Board of
                Directors, after reasonable inquiry and investigation, including
                such consultation, if any, with such persons as such directors
                shall deem appropriate, that (a) such Beneficial Ownership by
                such Person is intended to cause, is reasonably likely to cause
                or will cause the Company to repurchase the Common Stock of the
                Company beneficially owned by such Person or to cause pressure
                on the Company to take action or enter into a transaction or
                series of transactions which would provide such Person with
                short-term financial gain under circumstances where the Board of
                Directors determines that the best long-term interests of the
                Company and its shareholders, but for the actions and possible
                actions of such Person, would not be served by taking such
                action or entering into such transactions or series of
                transactions at that time or (b) such Beneficial Ownership is
                causing or reasonably likely to cause a material adverse impact
                (including, but not limited to, impairment of relationships with
                customers or impairment of the Company's ability to maintain its
                competitive position) on the business or prospects of the
                Company. No delay or failure by the Board of Directors to
                declare a Person to be an Adverse Person shall in any way waive
                or otherwise affect the power of the Board of Directors
                subsequently to declare a Person to be an Adverse Person. In the
                event that the Board of Directors should at any time determine,
                upon reasonable inquiry and investigation, including
                consultation with such Persons as the Board of Directors shall
                deem appropriate, that such Person has not met or complied with
                any condition specified by the Board of Directors, the Board of
                Directors may at any time thereafter declare such Person to be
                an Adverse Person pursuant to the provisions of this Section
                11(a)(ii)(B),

then, and in each such case, promptly following any such occurrence, proper
provision shall be made so that each holder of a Right, except as provided in
Section 7(e) hereof, shall thereafter have a right to receive, upon exercise
thereof at the then current Exercise Price in accordance with the terms of this
Agreement, such number of shares of Preferred Stock of the Company as shall
equal the result obtained by (x) multiplying the then current Exercise Price by
the then number of one one-hundredths of a share of Preferred Stock for which a
Right was exercisable immediately prior to the first occurrence of a Section
11(a)(ii) Event, whether or not such Right was then exercisable, and dividing
that product by (y) 50% of the Fair Market Value per one one-hundredth of a
share of the Preferred Stock (determined pursuant to Section 11(d)) on

                                       17

<PAGE>   21



the date of the occurrence of a Section 11(a)(ii) Event (such number of shares
being referred to as the "Adjustment Shares").

                            (iii) In lieu of issuing any shares of Preferred
                Stock in accordance with Section 11(a)(ii) hereof, the Company,
                acting by or pursuant to resolution of the Board of Directors,
                may, and in the event that the number of shares of Preferred
                Stock which are authorized by the Company's Articles of
                Organization but not outstanding or reserved for issuance for
                purposes other than upon exercise of the Rights is not
                sufficient to permit the exercise in full of the Rights in
                accordance with the foregoing subparagraph (ii) of this Section
                11(a), the Company, acting by or pursuant to resolution of the
                Board of Directors, shall: (A) determine the excess of (X) the
                Fair Market Value of the Adjustment Shares issuable upon the
                exercise of a Right (the "Current Value") over (Y) the Exercise
                Price attributable to each Right (such excess being referred to
                as the "Spread") and (B) with respect to all or a portion of
                each Right (subject to Section 7(e) hereof), make adequate
                provision to substitute for the Adjustment Shares, upon payment
                of the applicable Exercise Price, (1) cash, (2) a reduction in
                the Exercise Price, (3) Preferred Stock Equivalents which the
                Board of Directors has deemed to have the same value as shares
                of Common Stock of the Company, (4) debt securities of the
                Company, (5) other assets of the Company or (6) any combination
                of the foregoing which, when added to any shares of Preferred
                Stock issued upon such exercise, has an aggregate value equal to
                the Current Value, where such aggregate value has been
                determined by the Board of Directors based upon the advice of a
                nationally recognized investment banking firm selected by the
                Board of Directors; PROVIDED, HOWEVER, that if the Company shall
                not have made adequate provision to deliver value pursuant to
                clause (B) above within thirty (30) days following the later of
                (x) the first occurrence of a Section 11(a)(ii) Event and (y)
                the date on which the Company's right of redemption pursuant to
                Section 23(a) expires (the later of (x) and (y) being referred
                to herein as the "Section 11(a)(ii) Trigger Date"), then the
                Company shall be obligated to deliver, upon the surrender for
                exercise of a Right and without requiring payment of the
                Exercise Price, shares of Preferred Stock (to the extent
                available) and then, if necessary, cash, which shares and/or
                cash have an aggregate value equal to the Spread. If the Board
                of Directors shall determine in good faith that it is likely
                that sufficient additional shares of Preferred Stock could be
                authorized for issuance upon exercise in full of the Rights, the
                30-day period set forth above may be extended to the extent
                necessary, but not more than ninety (90) days after the Section
                11(a)(ii) Trigger Date, in order that the Company may seek
                stockholder approval for the authorization of such additional
                shares (such period, as it may be extended, being referred to
                herein as the "Substitution Period"). To the extent that the
                Company determines that some action need be taken pursuant to
                the first and/or second sentences of this Section 11(a)(iii),
                the Company (x) shall provide, subject to Section 7(e) hereof,
                that such action shall apply uniformly to all

                                       18

<PAGE>   22



                outstanding Rights and (y) may suspend the exercisability of the
                Rights until the expiration of the Substitution Period in order
                to seek any authorization of additional shares and/or to decide
                the appropriate form of distribution to be made pursuant to such
                first sentence and to determine the value thereof. In the event
                of any such suspension, the Company shall issue a public
                announcement stating that the exercisability of the Rights has
                been temporarily suspended and a public announcement at such
                time as the suspension is no longer in effect. For purposes of
                this Section 11(a)(iii), the value of the Preferred Stock shall
                be the Fair Market Value (as determined pursuant to Section
                11(d) hereof) per share of the Preferred Stock on the Section
                11(a)(ii) Trigger Date and the value of any Preferred Stock
                Equivalent shall be deemed to have the same value as the
                Preferred Stock on such date.

                (b)   If the Company shall fix a record date for the issuance of
rights, options or warrants to all holders of Preferred Stock entitling them
(for a period expiring within forty-five (45) calendar days after such record
date) to subscribe for or purchase Preferred Stock (or securities having the
same or more favorable rights, privileges and preferences as the shares of
Preferred Stock ("Preferred Stock Equivalents")) or securities convertible into
Preferred Stock or Preferred Stock Equivalents at a price per share of Preferred
Stock or per share of Preferred Stock Equivalents (or having a conversion price
per share, if a security convertible into Preferred Stock or Preferred Stock
Equivalents) less than the Fair Market Value (as determined pursuant to Section
11(d) hereof) per share of Preferred Stock on such record date, the Exercise
Price to be in effect after such record date shall be determined by multiplying
the Exercise Price in effect immediately prior to such record date by a
fraction, the numerator of which shall be the number of shares of Preferred
Stock outstanding on such record date, plus the number of shares of Preferred
Stock which the aggregate offering price of the total number of shares of
Preferred Stock and/or Preferred Stock Equivalents to be offered (and the
aggregate initial conversion price of the convertible securities so to be
offered) would purchase at such Fair Market Value and the denominator of which
shall be the number of shares of Preferred Stock outstanding on such record
date, plus the number of additional shares of Preferred Stock and Preferred
Stock Equivalents 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 a Right be less than the aggregate par value of the shares of capital stock
of the Company issuable upon exercise of a 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 the Fair Market Value
thereof determined in accordance with Section 11(d) hereof. Shares of Preferred
Stock owned by or held for the account of the Company shall not be deemed
outstanding for the purpose of any such computation. Such adjustments shall be
made successively whenever such a record date is fixed; and in the event that
such rights or warrants are not so issued, the Exercise Price shall be adjusted
to be the Exercise Price which would then be in effect if such record date had
not been fixed.


                                       19

<PAGE>   23



                (c)   If the Company shall fix a record date for the making of a
distribution to all holders of Preferred Stock (including any such distribution
made in connection with a consolidation or merger in which the Company is the
continuing or surviving corporation), of evidences of indebtedness, cash (other
than a regular periodic cash dividend out of the earnings or retained earnings
of the Company), assets (other than a dividend payable in Preferred Stock, but
including any dividend payable in stock other than Preferred Stock) or
convertible securities, subscription rights or warrants (excluding those
referred to in Section 11(b)), the Exercise Price to be in effect after such
record date shall be determined by multiplying the Exercise Price in effect
immediately prior to such record date by a fraction, the numerator of which
shall be the Fair Market Value (as determined pursuant to Section 11(d) hereof)
per one one-hundredth of a share of Preferred Stock on such record date, less
the Fair Market Value (as determined pursuant to Section 11(d) hereof) of the
portion of the cash, assets or evidences of indebtedness so to be distributed or
of such convertible securities, subscription rights or warrants applicable to
one one-hundredth of a share of Preferred Stock and the denominator of which
shall be the Fair Market Value (as determined pursuant to Section 11(d) hereof)
per one one-hundredth of a share of Preferred Stock; PROVIDED, HOWEVER, that in
no event shall the consideration to be paid upon the exercise of a Right be less
than the aggregate par value of the shares of capital stock of the Company
issuable upon exercise of a 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 Exercise Price shall again be adjusted to be the Exercise Price
which would be in effect if such record date had not been fixed.

                (d)   For the purpose of this Agreement, the "Fair Market Value"
of any share of Preferred Stock, Common Stock or any other stock or any Right or
other security or any other property shall be determined as provided in this
Section 11(d).

                      (i)   In the case of a publicly-traded stock or other
                security, the Fair Market Value on any date shall be deemed to
                be the average of the daily closing prices per share of such
                stock or per unit of such other 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 Fair Market Value per share of any share of stock is
                determined during a period following the announcement by the
                issuer of such stock of (x) a dividend or distribution on such
                stock payable in shares of such stock or securities convertible
                into shares of such stock or (y) any subdivision, combination or
                reclassification of such stock, and prior to the expiration of
                the 30 Trading Day period after the ex- dividend date for such
                dividend or distribution, or the record date for such
                subdivision, combination or reclassification, then, and in each
                such case, the Fair Market Value shall be properly adjusted to
                take into account ex-dividend trading. The closing price for
                each day shall be the last sale price, regular way, or, in case
                no such sale takes place on such day, the average of the closing
                bid and asked prices, regular way, in either case as reported in
                the principal consolidated transaction reporting system with
                respect to securities listed or admitted to trading on the New
                York Stock Exchange or, if the securities are not

                                       20

<PAGE>   24



                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 such security is listed or
                admitted to trading; or, if not listed or admitted to trading on
                any national securities exchange, the last quoted price (or, if
                not so quoted, the average of the last quoted 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
                no bids for such security are 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 such security
                selected by the Board of Directors of the Company. If on any
                such date no market maker is making a market in such security,
                the Fair Market Value of such security on such date shall be
                determined reasonably and with utmost good faith to the holders
                of the Rights by the Board of Directors of the Company,
                PROVIDED, HOWEVER, that if at the time of such determination
                there is an Acquiring Person or an Adverse Person, the Fair
                Market Value of such security on such date shall be determined
                by a nationally recognized investment banking firm selected by
                the Board of Directors, which determination shall be described
                in a statement filed with the Rights Agent and shall be binding
                on the Rights Agent and the holders of the Rights. The term
                "Trading Day" shall mean a day on which the principal national
                securities exchange on which such security is listed or admitted
                to trading is open for the transaction of business or, if such
                security is not listed or admitted to trading on any national
                securities exchange, a Business Day.

                      (ii)  If a security is not publicly held or not so listed
                or traded, "Fair Market Value" shall mean the fair value per
                share of stock or per other unit of such security, determined
                reasonably and with utmost good faith to the holders of the
                Rights by the Board of Directors of the Company; PROVIDED,
                HOWEVER, that if at the time of such determination there is an
                Acquiring Person or an Adverse Person, the Fair Market Value of
                such security on such date shall be determined by a nationally
                recognized investment banking firm selected by the Board of
                Directors, which determination shall be described in a statement
                filed with the Rights Agent and shall be binding on the Rights
                Agent and the holders of the Rights; PROVIDED, HOWEVER, that for
                the purposes of making any adjustment provided for by Section
                11(a)(ii) hereof, the Fair Market Value of a share of Preferred
                Stock shall not be less than the product of the then Fair Market
                Value of a share of Common Stock multiplied by the higher of the
                then Dividend Multiple or Vote Multiple (as both of such terms
                are defined in the Certificate of Designation attached as
                Exhibit A hereto) applicable to the Preferred Stock and shall
                not exceed 105% of the product of the then Fair Market Value of
                a share of Common Stock multiplied by the higher of the then
                Dividend Multiple or Vote Multiple applicable to the Preferred
                Stock.


                                       21

<PAGE>   25



                      (iii) In the case of property other than securities, the
                Fair Market Value thereof shall be determined reasonably and
                with utmost good faith to the holders of Rights by the Board of
                Directors of the Company; PROVIDED, HOWEVER, that if at the time
                of such determination there is an Acquiring Person or an Adverse
                Person, the Fair Market Value of such property on such date
                shall be determined by a nationally recognized investment
                banking firm selected by the Board of Directors, which
                determination shall be described in a statement filed with the
                Rights Agent and shall be binding upon the Rights Agent and the
                holders of the Rights.

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

                (f)   If as a result of any provision of Section 11(a) or
Section 13(a) hereof, the holder of any Right thereafter exercised shall become
entitled to receive any shares of capital stock of the Company other than
Preferred Stock, thereafter the number of such other shares so receivable upon
exercise of any Right shall be subject to adjustment from time to time in a
manner and on terms as nearly equivalent as practicable to the provisions with
respect to the Preferred Stock contained in Section 11(a), (b), (c), (d), (e),
(g) through (k) and (m), inclusive, and the provisions of Sections 7, 9, 10, 13
and 14 hereof with respect to the Preferred Stock shall apply on like terms to
any such other shares.

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

                (h)   Unless the Company shall have exercised its election as
provided in Section 11(i), upon each adjustment of the Exercise Price as a
result of the calculations made in Section 11(b) and (c), each Right outstanding
immediately prior to the making of such adjustment shall thereafter evidence the
right to purchase, at the adjusted Exercise Price, that number of one
one-hundredths of a share of Preferred Stock (calculated to the nearest one-
millionth) as the Board of Directors reasonably determines is appropriate to
preserve economic value of the Rights, including, by way of example, that number
obtained by (i) multiplying (x) the number of one one-hundredths of a share of
Preferred Stock for which a Right may be

                                       22

<PAGE>   26



exercisable immediately prior to this adjustment by (y) the Exercise Price in
effect immediately prior to such adjustment of the Exercise Price and (ii)
dividing the product so obtained by the Exercise Price in effect immediately
after such adjustment of the Exercise Price.

                (i)   The Company may elect on or after the date of any
adjustment of the Exercise Price to adjust the number of Rights, in substitution
for any adjustment in the number of shares of Preferred Stock purchasable upon
the exercise of a Right. Each of the Rights outstanding after the adjustment in
the number of Rights shall be exercisable for the number of one one-hundredths
of a share of Preferred Stock for which a Right was exercisable immediately
prior to such adjustment. Each Right held of record prior to such adjustment of
the number of Rights shall become that number of Rights (calculated to the
nearest one-ten- thousandth) obtained by dividing the Exercise Price in effect
immediately prior to adjustment of the Exercise Price by the Exercise Price in
effect immediately after adjustment of the Exercise 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 Exercise Price is adjusted or any day thereafter, but, if the Right
Certificates have been issued, shall be at least ten (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 may bear, at
the option of the Company, the adjusted Exercise Price) and shall be registered
in 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 Exercise
Price or the number of one one-hundredths of a share of Preferred Stock issuable
upon the exercise of the Rights, the Right Certificates theretofore and
thereafter issued may continue to express the Exercise Price per share and the
number of shares which were expressed in the initial Right Certificates issued
hereunder without prejudice to any adjustment or change.

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


                                       23

<PAGE>   27



                (l)   In any case in which this Section 11 shall require that an
adjustment in the Exercise 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
the number of one one-hundredths of a share of Preferred Stock or other capital
stock or securities of the Company, if any, issuable upon such exercise over and
above the number of one one-hundredths of a share of Preferred Stock and other
capital stock or securities of the Company, if any, issuable upon such exercise
on the basis of the Exercise 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)   Anything in this Section 11 to the contrary
notwithstanding, the Company shall be entitled to make such reductions in the
Exercise Price, in addition to those adjustments expressly required by this
Section 11, as and to the extent that in their good faith judgment a majority of
the Board of Directors shall determine to be advisable in order that any
consolidation or subdivision of the Preferred Stock, issuance wholly for cash of
any shares of Preferred Stock at less than the Fair Market Value, issuance
wholly for cash of shares of Preferred Stock or securities which by their terms
are convertible into or exchangeable for shares of Preferred Stock, stock
dividends or issuance of rights, options or warrants referred to hereinabove in
this Section 11, hereafter made by the Company to holders of its Preferred
Stock, shall not be taxable to such shareholders.

                (n)   The Company covenants and agrees that it shall not, at any
time after the Distribution Date and so long as the Rights have not been
redeemed pursuant to Section 23 hereof or exchanged pursuant to Section 24
hereof, (i) consolidate with (other than a Subsidiary of the Company in a
transaction that complies with the proviso at the end of this sentence), (ii)
merge with or into, or (iii) sell or transfer (or permit any Subsidiary to sell
or transfer), in one transaction or a series of related transactions, assets or
earning power aggregating 50% or more of the assets or earning power of the
Company and its Subsidiaries taken as a whole, to any other Person or Persons
(other than the Company and/or any of its Subsidiaries in one or more
transactions each of which complies with the proviso at the end of this
sentence) if (x) at the time of or immediately after such consolidation, merger
or sale there are any rights, warrants or other instruments outstanding or
agreements or arrangements in effect which would substantially diminish or
otherwise eliminate the benefits intended to be afforded by the Rights, or (y)
prior to, simultaneously with or immediately after such consolidation, merger or
sale the shareholders of a Person who constitutes, or would constitute, the
"Principal Party" for the 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; PROVIDED, HOWEVER, that this Section 11(n) shall not affect the
ability of any Subsidiary of the Company to consolidate with, or merge with or
into, or sell or transfer assets or earning power to, any other Subsidiary of
the Company. The Company further covenants and agrees that after the
Distribution Date it will not, except as permitted by Section 23 or Section 27
hereof, take (or permit any Subsidiary to take) any action if at the time such
action is taken it is

                                       24

<PAGE>   28



reasonably foreseeable that such action will substantially diminish or otherwise
eliminate the benefits intended to be afforded by the Rights.

                (o)   Notwithstanding anything in this Agreement to the
contrary, in the event the Company shall at any time after the date of this
Agreement and prior to the Distribution Date (i) declare or pay any dividend on
the outstanding Common Stock of the Company payable in shares of Common Stock of
the Company or (ii) effect a subdivision, combination or consolidation of the
outstanding shares of Common Stock of the Company (by reclassification or
otherwise than by payment of dividends in shares of Common Stock of the Company)
into a greater or lesser number of shares of Common Stock of the Company, then
in any such case (A) the number of one one-hundredths of a share of Preferred
Stock purchasable after such event upon proper exercise of each Right shall be
determined by multiplying the number of one one-hundredths of a share of
Preferred Stock so purchasable immediately prior to such event by a fraction,
the numerator of which is the number of shares of Common Stock of the Company
outstanding immediately prior to such event and the denominator of which is the
number of shares of Common Stock of the Company outstanding immediately after
such event, and (B) each share of Common Stock of the Company outstanding
immediately after such event shall have issued with respect to it that number of
Rights which each share of Common Stock of the Company 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) shall only
result in the loss of rights under Section 11(a)(ii) to the extent so exercised
and shall not otherwise affect the rights of holders of Right Certificates under
this Rights Agreement, including rights to purchase securities of the Principal
Party following a Section 13 Event which has occurred or may thereafter occur,
as set forth in Section 13 hereof. Upon exercise of a Right Certificate under
Section 11(a)(ii), the Rights Agent shall return such Right Certificate duly
marked to indicate that such exercise has occurred.

         Section 12. CERTIFICATE OF ADJUSTED EXERCISE PRICE OR NUMBER OF SHARES.
Whenever an adjustment is made as provided in Section 11 or Section 13 hereof,
the Company shall (a) promptly prepare a certificate setting forth such
adjustment and a brief statement of the facts accounting for such adjustment,
(b) promptly file with the Rights Agent and with each transfer agent for the
Preferred Stock and the Common Stock of the Company a copy of such certificate
and (c) mail a brief summary thereof to each holder of a Right Certificate in
accordance with Section 26 hereof. The Rights Agent shall be fully protected in
relying on any such certificate and on any adjustment contained therein and
shall not be deemed to have knowledge of any such adjustment unless and until it
shall have received such certificate.

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


                                       25

<PAGE>   29



                (a)   In the event that, following the Stock Acquisition Date,
directly or indirectly, (x) the Company shall consolidate with, or merge with
and into, any other Person (other than a Subsidiary of the Company in a
transaction which is not prohibited by Section 11(n) hereof), and the Company
shall not be the continuing or surviving corporation of such consolidation or
merger, (y) any Person (other than a Subsidiary of the Company in a transaction
which is not prohibited by the proviso at the end of the first sentence of
Section 11(n) hereof) 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 and, in connection with such merger, all or part of the shares of
Common Stock of the Company shall be changed into or exchanged for stock or
other securities of any other Person or cash or any other property, or (z) the
Company shall sell, mortgage or otherwise transfer (or one or more of its
Subsidiaries shall sell, mortgage or otherwise transfer), in one transaction or
a series of related transactions, assets or earning power aggregating 50% or
more of the assets or earning power of the Company and its Subsidiaries (taken
as a whole) to any other Person or Persons (other than the Company or any
Subsidiary of the Company in one or more transactions, each of which is not
prohibited by the proviso at the end of the first sentence of Section 11(n)
hereof), then, and in each such case, proper provision shall be made so that:
(i) each holder of a Right, except as provided in Section 7(e) hereof, shall
have the right to receive, upon the exercise thereof at the then current
Exercise Price in accordance with the terms of this Agreement, such number of
validly authorized and issued, fully paid and nonassessable shares of freely
tradeable Common Stock of the Principal Party (as hereinafter defined in Section
13(b)), free and clear of rights of call or first refusal, liens, encumbrances,
transfer restrictions or other adverse claims, as shall be equal to the result
obtained by (1) multiplying the then current Exercise Price by the number of one
one-hundredths of a share of Preferred Stock for which a Right is exercisable
immediately prior to the first occurrence of a Section 13 Event, and dividing
that product by (2) 50% of the Fair Market Value (determined pursuant to Section
11(d) hereof) per share of the Common Stock of such Principal Party 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, mortgage 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 Stock
to permit exercise of all outstanding Rights in accordance with this Section
13(a) and the making of payments in cash and/or other securities in accordance
with Section 11(a)(iii) 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 shares of Common Stock
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), the Person that is
         the issuer of any securities into which

                                       26

<PAGE>   30



         shares of Common Stock of the Company are converted in such merger or
         consolidation, or, if there is more than one such issuer, the issuer of
         Common Stock that has the highest aggregate Fair Market Value
         (determined pursuant to Section 11(d)), and if no securities are so
         issued, the Person that is the other party to the merger or
         consolidation, or, if there is more than one such Person, the Person
         the Common Stock of which has the highest aggregate Fair Market Value
         (determined pursuant to Section 11(d)); and

                      (ii)  in the case of any transaction described in
         clause (z) of the first sentence of Section 13(a), the Person that is
         the party receiving the greatest portion of the assets or earning power
         transferred pursuant to such transaction or transactions, or, if each
         Person that is a party to such transaction or transactions receives the
         same portion of the assets or earning power transferred pursuant to
         such transaction or transactions or if the Person receiving the largest
         portion of the assets or earning power cannot be determined, whichever
         Person the Common Stock of which has the highest aggregate Fair Market
         Value (determined pursuant to Section 11(d));

PROVIDED, HOWEVER, that in any such case, (1) if the Common Stock of such Person
is not at such time and has not been continuously over the preceding 12-month
period registered under Section 12 of the Exchange Act ("Registered Common
Stock") or such Person is not a corporation, and such Person is a direct or
indirect Subsidiary or Affiliate of another Person who has Registered Common
Stock outstanding, "Principal Party" shall refer to such other Person; (2) if
the Common Stock of such Person is not Registered Common Stock or such Person is
not a corporation, and such Person is a direct or indirect Subsidiary of another
Person but is not a direct or indirect Subsidiary of another Person which has
Registered Common Stock outstanding, "Principal Party" shall refer to the
ultimate parent entity of such first-mentioned Person; (3) if the Common Stock
of such Person is not Registered Common Stock or such Person is not a
corporation, and such Person is directly or indirectly controlled by more than
one Person, and one or more of such other Persons has Registered Common Stock
outstanding, "Principal Party" shall refer to whichever of such other Persons is
the issuer of the Registered Common Stock having the highest aggregate Fair
Market Value (determined pursuant to Section 11(d)); and (4) if the Common Stock
of such Person is not Registered Common Stock or such Person is not a
corporation, and such Person is directly or indirectly controlled by more than
one Person, and none of such other Persons has Registered Common Stock
outstanding, "Principal Party" shall refer to whichever ultimate parent entity
is the corporation having the greatest stockholders' equity or, if no such
ultimate parent entity is a corporation, "Principal Party" shall refer to
whichever ultimate parent entity is the entity having the greatest net assets.

                (c)   The Company shall not consummate any such consolidation,
merger, sale or transfer unless prior thereto (x) the Principal Party shall have
a sufficient number of authorized shares of its Common Stock, which have not
been issued or reserved for issuance, to permit the exercise in full of the
Rights in accordance with this Section 13, and (y) the Company and each
Principal Party and each other Person who may become a Principal Party

                                       27

<PAGE>   31



as a result of such consolidation, merger, sale or transfer shall have executed
and delivered to the Rights Agent a supplemental agreement providing for the
terms set forth in Section 13(a) and (b) and further providing that, as soon as
practicable after the date of any consolidation, merger, sale or transfer of
assets mentioned in Section 13(a), the Principal Party at its own expense will:

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

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

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

                (d)   In case the Principal Party which is to be a party to a
transaction referred to in this Section 13 has a provision in any of its
authorized securities or in its Certificate of Incorporation or By-laws or other
instrument governing its affairs, which provision would have the effect of (i)
causing such Principal Party to issue (other than to holders of Rights pursuant
to this Section 13), in connection with, or as a consequence of, the
consummation of a transaction referred to in this Section 13, shares of Common
Stock of such Principal Party at less than the then current Fair Market Value
(determined pursuant to Section 11(d)) or securities exercisable for, or
convertible into, Common Stock of such Principal Party at less than such Fair
Market Value, or (ii) providing for any special payment, tax or similar
provisions in connection with the issuance of the Common Stock of such Principal
Party pursuant to the provisions of this Section 13, then, in such event, the
Company shall not consummate any such transaction unless prior thereto the
Company and such Principal Party shall have executed and delivered to the Rights
Agent a supplemental agreement providing that the provision in question of such
Principal Party shall have been canceled, waived or amended, or that the
authorized securities shall be redeemed, so that the applicable provision will
have no effect in connection with, or as a consequence of, the consummation of
the proposed transaction.


                                       28

<PAGE>   32



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

         Section 14. FRACTIONAL RIGHTS AND FRACTIONAL SHARES.

                (a)   The Company shall not be required to issue fractions of
Rights, except prior to the Distribution Date as provided in Section 11(o)
hereof, or to distribute Right Certificates which evidence fractional Rights. If
the Company elects not to issue such fractional Rights, the Company shall pay,
in lieu of such fractional Rights, 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 Fair Market Value
of a whole Right, as determined pursuant to Section 11(d) hereof.

                (b)   The Company shall not be required to issue fractions of
shares of Preferred Stock (other than fractions which are integral multiples of
one one-hundredth of a share of Preferred Stock) upon exercise of the Rights or
to distribute certificates which evidence fractional shares of Preferred Stock
(other than fractions which are integral multiples of one one-hundredth of a
share of Preferred Stock). In lieu of fractional shares of Preferred Stock that
are not integral multiples of one one-hundredth of a share of Preferred Stock,
the Company may 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 Fair Market Value of one one-hundredth of a share of Preferred
Stock. For purposes of this Section 14(b), the Fair Market Value of one
one-hundredth of a share of Preferred Stock shall be determined pursuant to
Section 11(d) hereof for the Trading Day immediately prior to the date of such
exercise.

                (c)   The holder of a Right by the acceptance of the Rights
expressly waives his right to receive any fractional Rights or any fractional
shares upon exercise of a Right, except as permitted by this Section 14.

         Section 15. RIGHTS OF ACTION. All rights of action in respect of this
Agreement, other than rights of action vested in the Rights Agent pursuant to
Sections 18 and 20 hereof, are vested in the respective registered holders of
the Right Certificates (or, prior to the Distribution Date, the registered
holders of the Common Stock of the Company); and any registered holder of any
Right Certificate (or, prior to the Distribution Date, of the Common Stock of
the Company), 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 Stock
of the Company), may, in such registered holder's own behalf and for such
registered holder's 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 Right 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 shall be entitled to specific
performance of the obligations

                                       29

<PAGE>   33



hereunder and injunctive relief against actual or threatened violations of the
obligations hereunder 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, each Right will be
transferable only simultaneously and together with the transfer of shares of
Common Stock of the Company;

                (b)   after the Distribution Date, the Right Certificates are
transferable only on the registry books of the Rights Agent if surrendered at
the office or offices of the Rights Agent designated for such purpose, duly
endorsed or accompanied by a proper instrument of transfer;

                (c)   subject to Sections 6(a) and 7(f), the Company and the
Rights Agent may deem and treat the person in whose name a Right Certificate
(or, prior to the Distribution Date, the associated certificate representing
Common Stock of the Company) 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 certificate representing
Common Stock of the Company made by anyone other than the Company or the Rights
Agent) for all purposes whatsoever, and, subject to the last sentence of Section
7(e), neither the Company nor the Rights Agent shall be affected by any notice
to the contrary; and

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

         Section 17. RIGHT CERTIFICATE HOLDER NOT DEEMED A SHAREHOLDER. 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 shares of Preferred
Stock or any other securities of the Company which may at any time be issuable
on the exercise of the Rights represented thereby, nor shall anything contained
herein or in any Right Certificate be construed to confer upon the holder of any
Right Certificate, as such, any of the rights of a shareholder of the Company or
any right to vote for the election of directors or upon any matter submitted to
shareholders at any meeting thereof, or to give or withhold consent to any
corporate action, or to receive notice of

                                       30

<PAGE>   34



meetings or other actions affecting shareholders (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.

                (a)   The Company agrees to pay to the Rights Agent such
compensation as shall be agreed to in writing between the Company and the Rights
Agent for all services rendered by it hereunder and, from time to time, on
demand of the Rights Agent, its reasonable expenses and counsel fees and
disbursements 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
gross 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 arising therefrom, directly
or indirectly. The provisions of this Section 18(a) shall survive the expiration
of the Rights and the termination of this Agreement.

                (b)   The Rights Agent shall be protected and shall incur no
liability for or in respect of any action taken, suffered or omitted by it in
connection with its administration of this Agreement in reliance upon any Right
Certificate or certificate representing Common Stock of the Company, Preferred
Stock, or 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 in good faith
and without negligence to be genuine and to be signed and executed by the proper
Person or Persons.

                (c)   The Rights Agent shall not be liable for consequential
damages under any provision of this Agreement or for any consequential damages
arising out of any act or failure to act hereunder.

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

                (a)   Any corporation into which the Rights Agent or any
successor Rights Agent may be merged or with which it may be consolidated, or
any corporation resulting from any merger or consolidation to which the Rights
Agent or any successor Rights Agent shall be a party, or any corporation
succeeding to the corporate trust or shareholder services business of the Rights
Agent or any successor Rights Agent, shall be the successor to the Rights Agent
under this Agreement without the execution or filing of any paper or any further
act on the part of any of the parties hereto, provided 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

                                       31

<PAGE>   35



may adopt the countersignature of the predecessor Rights Agent and deliver such
Right Certificates so countersigned; and in case at that time any of the Right
Certificates shall not have been countersigned, any successor Rights Agent may
countersign such Right Certificates either in the name of the predecessor 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.

                (b)   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 expressly 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 selected
by it (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 (including, without limitation, the identity of any Acquiring Person or
Adverse Person and the determination of "Fair Market Value") 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 shall be herein
specifically prescribed) may be deemed to be conclusively proved and established
by a certificate signed by a person believed by the Rights Agent to be the
Chairman of the Board of Directors, a Vice Chairman of the Board of Directors,
the President, a Vice President, the Treasurer, any Assistant Treasurer, the
Secretary or an Assistant Secretary of the Company and delivered to the Rights
Agent. Any 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 only for its
own gross negligence, bad faith or willful misconduct.

                (d)   The Rights Agent shall not be liable for or by reason of
any of the statements of fact or recitals contained in this Agreement or in the
Right Certificates (except its

                                       32

<PAGE>   36



countersignature thereof) or be required to verify the same, but all such
statements and recitals are and shall be deemed to have been made by the Company
only.

                (e)   The Rights Agent shall not be under any responsibility in
respect of the validity of this Agreement or the execution and delivery 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 7(e) hereof) or any
adjustment required under the provisions of Sections 11, 13 or 23(c) hereof or
responsible for the manner, method or amount of any such adjustment or the
ascertaining of the existence of facts that would require any such adjustment
(except with respect to the exercise of Rights evidenced by Right Certificates
after receipt of a certificate describing any such adjustment furnished in
accordance with Section 12 hereof), nor shall it be responsible for any
determination by the Board of Directors of the Company of the Fair Market Value
of the Rights or Preferred Stock pursuant to the provisions of Section 14
hereof; nor shall it by any act hereunder be deemed to make any representation
or warranty as to the authorization or reservation of any shares of Common Stock
of the Company or Preferred Stock to be issued pursuant to this Agreement or any
Right Certificate or as to whether any shares of Common Stock of the Company or
Preferred Stock will, when so issued, be validly authorized and issued, fully
paid and nonassessable.

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

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

                                       33

<PAGE>   37



Agent shall have received written instructions in response to such application
specifying the action to be taken or omitted.

                (h)   The Rights Agent and any shareholder, 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 the 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.

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

         Section 21. CHANGE OF RIGHTS AGENT. The Rights Agent or any successor
Rights Agent may resign and be discharged from its duties under this Agreement
upon thirty (30) days' notice in writing mailed to the Company by first class
mail. The Company may remove the Rights Agent or any successor Rights Agent
(with or without cause) upon thirty (30) days' notice in writing, mailed to the
Rights Agent or successor Rights Agent, as the case may be, and to each transfer
agent of the Common Stock of the Company and Preferred Stock 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 thirty
(30) days after giving notice of such removal or after it has been notified in
writing of such resignation or incapacity by the resigning or incapacitated
Rights Agent or by the holder of a Right Certificate (who shall, with such
notice, submit his Right Certificate for inspection by the Company), then the
incumbent Rights Agent or the registered holder of any Right Certificate may
apply to any court of competent jurisdiction for the appointment of a new Rights
Agent. Any successor Rights Agent, whether appointed by the Company or by such a
court, shall be (a) a corporation organized and doing business under the laws of
the United States or of the Commonwealth of Massachusetts or the State of New
York (or of any other state of the United States so long as such corporation is

                                       34

<PAGE>   38



authorized to do business as a banking institution in the Commonwealth of
Massachusetts or the State of New York), in good standing, which is authorized
under such laws to exercise stock transfer or corporate trust powers and is
subject to supervision or examination by federal or state authority and which
has at the time of its appointment as Rights Agent a combined capital and
surplus of at least $50,000,000 or (b) an Affiliate of a corporation described
in clause (a) of this sentence. After appointment, the successor Rights Agent
shall be vested with the same powers, rights, duties and responsibilities as if
it had been originally named as Rights Agent without further act or deed; but
the predecessor Rights Agent shall deliver and transfer to the successor Rights
Agent any property at the time held by it hereunder, and execute and deliver any
further assurance, conveyance, act or deed necessary for the purpose. Not later
than the effective date of any such appointment, the Company shall file notice
thereof in writing with the predecessor Rights Agent and each transfer agent of
the Common Stock of the Company and the Preferred Stock, 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 Exercise Price per share and the number or kind or class of shares of
stock 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 shares of Common Stock of the Company
following the Distribution Date and prior to the redemption or expiration of the
Rights, the Company (a) shall, with respect to shares of Common Stock of the
Company so issued or sold pursuant to the exercise of stock options or under any
employee plan or arrangement, or upon the exercise, conversion or exchange of
securities hereafter issued by the Company, and (b) may, in any other case, if
deemed necessary or appropriate by the Board of Directors of the Company, issue
Right Certificates representing the appropriate number of Rights in connection
with such issuance or sale; PROVIDED, HOWEVER, that (i) no such Right
Certificate shall be issued if, and to the extent that, the Company shall be
advised by counsel that such issuance would create a significant risk of
material adverse tax consequences to the Company or the person to whom such
Right Certificate would be issued, and (ii) no such Right Certificate shall be
issued if, and to the extent that, appropriate adjustments shall otherwise have
been made in lieu of the issuance thereof.

         Section 23. REDEMPTION.

                (a) The Board of Directors of the Company may, at its option,
redeem all but not less than all of the then outstanding Rights at a redemption
price of $.01 per Right, appropriately adjusted to reflect any dividend declared
or paid on the Common Stock of the Company in shares of Common Stock of the
Company or any subdivision or combination of the outstanding shares of Common
Stock of the Company or similar event occurring after the

                                       35

<PAGE>   39



date of this Agreement (such redemption price, as adjusted from time to time,
being hereinafter referred to as the "Redemption Price"). The Rights may be
redeemed only until the earlier to occur of (i) 5:00 P.M., Boston, Massachusetts
time, on the tenth calendar day after the Stock Acquisition Date, (ii) the
declaration by the Board of Directors that any Person is an Adverse Person or
(iii) the Final Expiration Date.

                (b)   Immediately upon the action of the Board of Directors of
the Company ordering the redemption of the Rights, and without any further
action and without any notice, the right to exercise the Rights will terminate
and the only right thereafter of the holders of Rights shall be to receive the
Redemption Price for each Right so held. Promptly after the action of the Board
of Directors ordering the redemption of the Rights, the Company shall give
notice of such redemption to the Rights Agent and the holders of the then
outstanding Rights by mailing such notice to the Rights Agent and to all such
holders at their last addresses as they appear upon the registry books of the
Rights Agent or, prior to the Distribution Date, on the registry books of the
Transfer Agent for the Common Stock of the Company. Any notice which is mailed
in the manner herein provided shall be deemed given, whether or not the holder
receives the notice. Each such notice of 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 Section 24 hereof or in connection with the purchase of
shares of Common Stock of the Company prior to the Distribution Date.

                (c)   The Company may, at its option, pay the Redemption Price
in cash, shares of Common Stock of the Company (based on the Fair Market Value
of the Common Stock of the Company as of the time of redemption) or any other
form of consideration deemed appropriate by the Board of Directors.

         Section 24. EXCHANGE.

                (a)   (i)   The Board of Directors of the Company may, at its
                option, at any time on or after the Distribution Date, exchange
                all or part of the then outstanding and exercisable Rights
                (which shall not include Rights that have become void pursuant
                to the provisions of Section 7(e) hereof) for shares of Common
                Stock of the Company at an exchange ratio of one share of Common
                Stock of the Company 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 "Section 24(a)(i) 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 an Exempt Person), together with all
                Affiliates and Associates of such Person, becomes the Beneficial
                Owner of 50% or more of the Common Stock of the Company.


                                       36

<PAGE>   40



                      (ii)  Notwithstanding the foregoing, the Board of
                Directors of the Company may, at its option, at any time on or
                after the Distribution Date, exchange all or part of the then
                outstanding and exercisable Rights (which shall not include
                Rights that have become void pursuant to the provisions of
                Section 7(e) hereof) for shares of Common Stock of the Company
                at an exchange ratio specified in the following sentence, as
                appropriately adjusted to reflect any stock split, stock
                dividend or similar transaction occurring after the date of this
                Agreement. Subject to the adjustment described in the foregoing
                sentence, each Right may be exchanged for that number of shares
                of Common Stock of the Company obtained by dividing the Spread
                (as defined in Section 11(a)(iii)) by the then Fair Market Value
                per one one-hundredth of a share of Preferred Stock on the
                earlier of (x) the date on which any person becomes an Acquiring
                Person or (y) the date on which a tender or exchange offer by
                any Person (other than an Exempt Person) is first published or
                sent or given within the meaning of Rule 14d-4(a) of the
                Exchange Act or any successor rule, if upon consummation thereof
                such Person would be the Beneficial Owner of more than 15% of
                the shares of Common Stock of the Company then outstanding (such
                exchange ratio being referred to herein as the "Section
                24(a)(ii) 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 an Exempt
                Person), together with all Affiliates and Associates of such
                Person, becomes the Beneficial Owner of 50% or more of the
                Common Stock of the Company.

                (b)   Immediately upon the action of the Board of Directors of
the Company ordering the exchange of any Rights pursuant to subsection (a) of
this Section 24 and without any further action and without any notice, the right
to exercise such Rights shall terminate and the only right thereafter of a
holder of such Rights shall be to receive that number of shares of Common Stock
of the Company equal to the number of such Rights held by such holder multiplied
by the Section 24(a)(i) Exchange Ratio or the Section 24(a)(ii) Exchange Ratio,
as applicable. The Company shall promptly give notice of any such exchange in
accordance with Section 26 hereof and shall promptly 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 shares of Common
Stock of the Company for Rights will be effected and, in the event of any
partial exchange, the number of Rights which will be exchanged. Any partial
exchange shall be effected pro rata based on the number of Rights (other than
Rights which have become void pursuant to the provisions of Section 7(e) hereof)
held by each holder of Rights.

                (c)   In any exchange pursuant to this Section 24, the Company,
at its option, may substitute Preferred Stock (or Preferred Stock Equivalent, as
such term is defined in Section 11(b) hereof) for Common Stock of the Company
exchangeable for Rights, at the

                                       37

<PAGE>   41



initial rate of one one-hundredth of a share of Preferred Stock (or Preferred
Stock Equivalent) for each share of Common Stock of the Company, as
appropriately adjusted to reflect adjustments in the voting rights of the
Preferred Stock pursuant to the terms thereof, so that the fraction of a share
of Preferred Stock delivered in lieu of each share of Common Stock of the
Company shall have the same voting rights as one share of Common Stock of the
Company.

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

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

         Section 25. NOTICE OF CERTAIN EVENTS.

                (a)   In case the Company shall propose, at any time after the
Distribution Date, (i) to pay any dividend payable in stock of any class to the
holders of Preferred Stock or to make any other distribution to the holders of
Preferred Stock (other than a regular periodic cash dividend out of earnings or
retained earnings of the Company), or (ii) to offer to the holders of Preferred
Stock rights or warrants to subscribe for or to purchase any additional shares
of Preferred Stock or shares of stock of any class or any other securities,
rights or options, or (iii) to effect any reclassification of its Preferred
Stock (other than a reclassification involving only the subdivision of
outstanding shares of Preferred Stock), or (iv) to effect any consolidation or
merger into or with, or to effect any sale, mortgage or other transfer (or to
permit one or more of its Subsidiaries to effect any sale, mortgage or other
transfer), in one transaction or a series of related 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 (other than a Subsidiary of the Company in one
or more transactions each of which is not prohibited by the proviso at the end
of the first sentence of Section 11(n) hereof), (v) to effect the liquidation,
dissolution or winding up of the Company, or (vi) to declare or pay any dividend
on the Common Stock of the Company payable in Common Stock of the Company or to
effect a subdivision, combination or consolidation of the Common Stock of the
Company (by

                                       38

<PAGE>   42



reclassification or otherwise than by payment of dividends in Common Stock of
the Company) then in each such case, the Company shall give to each holder of a
Right Certificate and to the Rights Agent, in accordance with Section 26 hereof,
a notice of such proposed action, which shall specify the record date for the
purposes of such stock dividend, distribution of rights or warrants, or the date
on which such reclassification, consolidation, merger, sale, transfer,
liquidation, dissolution, or winding up is to take place and the date of
participation therein by the holders of the shares of Common Stock of the
Company and/or Preferred Stock, if any such date is to be fixed, and such notice
shall be so given in the case of any action covered by clause (i) or (ii) above
at least twenty (20) days prior to the record date for determining holders of
the shares of Preferred Stock for purposes of such action, and in the case of
any such other action, at least twenty (20) days prior to the date of the taking
of such proposed action or the date of participation therein by the holders of
the shares of Common Stock of the Company and/or Preferred Stock, whichever
shall be the earlier; PROVIDED, HOWEVER, no such notice shall be required
pursuant to this Section 25 as a result of any Subsidiary of the Company
effecting a consolidation or merger with or into, or effecting a sale or other
transfer of assets or earnings power to, any other Subsidiary of the Company in
a manner not inconsistent with the provisions of this Agreement.

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

         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 prepaid, by facsimile transmission or by nationally-recognized
overnight courier addressed (until another address is filed in writing with the
Rights Agent) as follows:

                Medford Bancorp, Inc.
                29 High Street
                Medford, MA 02155

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


                                       39

<PAGE>   43



                State Street Bank and Trust Company
                c/o Boston EquiServe Limited Partnership
                150 Royall Street
                Canton, Massachusetts 02021
                Attention:  Administration

Notices or demands authorized by this Agreement to be given or made by the
Company or the Rights Agent to the holder of any Right Certificate (or, prior to
the Distribution Date, to the holder of any certificate representing shares of
Common Stock of the Company) 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 as the Company may deem necessary or
desirable without the approval of any holders of certificates representing
shares of Common Stock of the Company. From and after the Distribution Date, the
Company and the Rights Agent shall, if the Company so directs, supplement or
amend this Agreement without the approval of any holder of Right Certificates in
order (i) to cure any ambiguity, (ii) to correct or supplement any provision
contained herein which may be defective or inconsistent with any other
provisions herein, (iii) to shorten or lengthen any time period hereunder, or
(iv) to change or supplement the provisions hereof in any manner which the
Company may deem necessary or desirable and which shall not adversely affect the
interests of the holders of Right Certificates (other than an Acquiring Person,
Adverse Person or any Affiliate or Associate of an Acquiring Person or Adverse
Person); PROVIDED, HOWEVER, that from and after the Distribution Date this
Agreement may not be supplemented or amended to lengthen, pursuant to clause
(iii) of this sentence, (A) a time period relating to when the Rights may be
redeemed at such time as the Rights are not then redeemable or (B) any other
time period unless such lengthening is for the purpose of protecting, enhancing
or clarifying the rights of, and the benefits to, the holders of Rights (other
than an Acquiring Person, Adverse Person or any Affiliate or Associate of an
Acquiring Person or Adverse Person). Without limiting the foregoing, the Company
may at any time prior to such time as any Person becomes an Acquiring Person
amend this Agreement to lower the threshold set forth in Section 1(a) to not
less than the greater of (i) the sum of .001% and the largest percentage of the
outstanding Common Stock of the Company then known by the Company to be
beneficially owned by any Person (other than the Company, any Subsidiary of the
Company, any employee benefit plan of the Company or any Subsidiary of the
Company, or any entity holding Common Stock of the Company for or pursuant to
the terms of any such plan) and (ii) 10%. Upon the delivery of such 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. Prior to the
Distribution Date, the interests of the holders of Rights shall be deemed
coincident with the interests of the holders of Common Stock of the Company.
Notwithstanding any other provision hereof, the Rights Agent's consent must be
obtained regarding any amendment or supplement pursuant to this Section 27 which
alters the Rights Agent's rights or duties.

                                       40

<PAGE>   44



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

         Section 29. DETERMINATIONS AND ACTIONS BY THE BOARD OF DIRECTORS. For
all purposes of this Agreement, any calculation of the number of shares of
Common Stock of the Company outstanding at any particular time, including for
purposes of determining the particular percentage of such outstanding shares of
Common Stock of the Company 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
Rules under the Exchange Act as in effect on the date hereof. 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 of Directors or to the Company, or as may be necessary or
advisable in the administration of this Agreement, including without limitation,
the right and power to (i) interpret the provisions of this Agreement and (ii)
make all determinations deemed necessary or advisable for the administration of
this Agreement (including a determination to redeem or not redeem the Rights or
to amend the Agreement). All such actions, calculations, interpretations and
determinations (including, for purposes of clause (y) below, all omissions with
respect to the foregoing) which are done or made by the Board of Directors in
good faith shall (x) be final, conclusive and binding on the Company, the Rights
Agent, the holders of the Rights and all other parties, and (y) not subject any
member of the Board of Directors to any liability to the holders of the Rights
or to any other person.

         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 Stock of the Company) 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,
registered holders of the Common Stock of the Company).

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


                                       41

<PAGE>   45



         Section 32. GOVERNING LAW. This Agreement, each Right and each Right
Certificate issued hereunder shall be deemed to be a contract made under the
laws of the Commonwealth of Massachusetts and for all purposes shall be governed
by and construed in accordance with the laws of such Commonwealth applicable to
contracts to be made and to be performed entirely within such Commonwealth. The
courts of the Commonwealth of Massachusetts and of the United States of America
located in the Commonwealth of Massachusetts (the "Massachusetts Courts") shall
have exclusive jurisdiction over any litigation arising out of or relating to
this Agreement and the transactions contemplated hereby, and any Person
commencing or otherwise involved in any such litigation shall waive any
objection to the laying of venue of such litigation in the Massachusetts Courts
and shall not plead or claim in any Massachusetts Court that such litigation
brought therein has been brought in an inconvenient forum.

         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.

                  [Remainder of page intentionally left blank]


                                       42

<PAGE>   46

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


ATTEST:                                     MEDFORD BANCORP, INC.



By: /s/ Eugene Murray                       By: /s/ Arthur H. Meehan
    ----------------------                      -------------------------------
                                                 Name: Arthur H. Meehan
                                                 Title: Chairman, President and
                                                        Chief Executive Officer


ATTEST:                                     MEDFORD SAVINGS BANK



By: /s/ Eugene Murray                       By: /s/ Arthur H. Meehan
    ----------------------                      -------------------------------
                                                 Name: Arthur H. Meehan
                                                 Title: Chairman, President and
                                                        Chief Executive Officer




ATTEST:                                     STATE STREET BANK AND
                                            TRUST COMPANY, as Rights Agent
Justine Alonzo
  Account Manager 

By: /s/ Justine Alonzo                      By: /s/ Charles Rossi
   -----------------------                      -------------------------------
                                                Name: Charles Rossi
                                                Title: Vice President




<PAGE>   47


                                                                       EXHIBIT A




                         VOTE OF DIRECTORS ESTABLISHING
                    SERIES A JUNIOR PARTICIPATING CUMULATIVE
                                 PREFERRED STOCK

                                       of

                              MEDFORD BANCORP, INC.

         Pursuant to Section 26 of Chapter 156B of the General Laws of The
Commonwealth of Massachusetts:

         VOTED, that pursuant to authority conferred upon and vested in the
Board of Directors by the Articles of Organization, as amended (the "Articles"),
of Medford Bancorp, Inc. (the "Corporation"), the Board of Directors hereby
establishes and designates a series of Preferred Stock of the Corporation, and
hereby fixes and determines the relative rights and preferences of the shares of
such series, in addition to those set forth in the Articles, as follows:

         Section 1. DESIGNATION AND AMOUNT. The shares of such series shall be
designated as "Series A Junior Participating Cumulative Preferred Stock" (the
"Series A Preferred Stock"), and the number of shares constituting such series
shall be 200,000.

         Section 2. DIVIDENDS AND DISTRIBUTIONS.

         (A)   (i)    Subject to the rights of the holders of any shares of any
series of preferred stock (or any similar stock) ranking prior and superior to
the Series A Preferred Stock with respect to dividends, the holders of shares of
Series A Preferred Stock, in preference to the holders of shares of common stock
and of any other junior stock, shall be entitled to receive, when, as and if
declared by the Board of Directors out of funds legally available for the
purpose, quarterly dividends payable in cash on the first day of March, June,
September and December 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
Series A Preferred Stock, in an amount per share (rounded to the nearest cent)
equal to the greater of (a) $1.00 or (b) subject to the provisions 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 Series A Preferred Stock. The multiple of
cash and non-cash dividends declared on the common stock to which holders of the
Series A Preferred Stock are entitled, which shall be 100 initially but which
shall be adjusted from

                                        1

<PAGE>   48



time to time as hereinafter provided, is hereinafter referred to as the
"Dividend Multiple." In the event the Corporation shall at any time after
September 22, 1993 (the "Rights Declaration Date") (i) declare or pay any
dividend on common stock payable in shares of common stock, or (ii) 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 Dividend Multiple thereafter applicable to the
determination of the amount of dividends which holders of shares of Series A
Preferred Stock shall be entitled to receive shall be the Dividend Multiple
applicable immediately prior to such event multiplied 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.

               (ii)   Notwithstanding anything else contained in this
paragraph (A), the Corporation shall, out of funds legally available for that
purpose, declare a dividend or distribution on the Series A Preferred Stock as
provided in this paragraph (A) 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 Series A Preferred Stock shall nevertheless
be payable on such subsequent Quarterly Dividend Payment Date.

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

         Section 3. VOTING RIGHTS. In addition to any other voting rights
required by law, the holders of shares of Series A Preferred Stock shall have
the following voting rights:

         (A)   Subject to the provision for adjustment hereinafter set forth,
each share of Series A Preferred Stock shall entitle the holder thereof to 100
votes on all matters submitted to a vote of the stockholders of the Corporation.
The number of votes which a holder of a share of Series

                                        2

<PAGE>   49



A Preferred Stock is entitled to cast, which shall initially be 100 but which
may be adjusted from time to time as hereinafter provided, is hereinafter
referred to as the "Vote Multiple." In the event the Corporation shall at any
time after the Rights Declaration Date (i) declare or pay any dividend on common
stock payable in shares of common stock, or (ii) 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 Vote Multiple thereafter applicable to the determination of the
number of votes per share to which holders of shares of Series A Preferred Stock
shall be entitled shall be the Vote Multiple immediately prior to such event
multiplied 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 or by law, the holders of
shares of Series A Preferred Stock and the holders of shares of common stock and
the holders of shares of any other capital stock of this Corporation having
general voting rights, shall vote together as one class on all matters submitted
to a vote of stockholders of the Corporation.

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

         Section 4. CERTAIN RESTRICTIONS.

         (A)    Whenever dividends or distributions payable on the Series A
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 Series A Preferred Stock outstanding shall have been paid in full, the
Corporation shall not:

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

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

         (iii)  except as permitted in subsection 4(A)(iv) below, redeem,
                purchase or otherwise acquire for consideration shares of any
                stock ranking on a parity (either as to

                                        3

<PAGE>   50



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

         (iv)   purchase or otherwise acquire for consideration any shares of
                Series A Preferred Stock, or any shares of any stock ranking on
                a parity (either as to dividends or upon liquidation,
                dissolution or winding up) with the Series A 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 Corporation shall not permit any subsidiary of the
Corporation to purchase or otherwise acquire for consideration any shares of
stock of the Corporation unless the Corporation could, under subsection (A) of
this Section 4, purchase or otherwise acquire such shares at such time and in
such manner.

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

         Section 6. LIQUIDATION, DISSOLUTION OR WINDING UP. Upon any liquidation
(voluntary or otherwise), dissolution or winding up of the Corporation, no
distribution shall be made (x) to the holders of shares of stock ranking junior
(either as to dividends or upon liquidation, dissolution or winding up) to the
Series A Preferred Stock unless, prior thereto, the holders of shares of Series
A Preferred Stock shall have received an amount equal to accrued and unpaid
dividends and distributions thereon, whether or not declared, to the date of
such payment, plus an amount equal to the greater of (1) $100.00 per share or
(2) 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 common stock, or (y) to the holders of stock ranking on
a parity (either as to dividends or upon liquidation, dissolution or winding up)
with the Series A Preferred Stock, except distributions made ratably on the
Series A Preferred Stock and all other such parity stock in proportion to the
total amounts to which the holders of all such shares are entitled upon such
liquidation, dissolution or winding up. In the event the Corporation shall at
any time after the Rights Declaration Date (i) declare or pay any dividend on
common stock payable in shares of common stock, or (ii) 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

                                        4

<PAGE>   51



of common stock) into a greater or lesser number of shares of common stock, then
in each such case the aggregate amount per share to which holders of shares of
Series A Preferred Stock were entitled immediately prior to such event under
clause (x) 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.

         Neither the consolidation of nor merging of the Corporation with or
into any other corporation or corporations, nor the sale or other transfer of
all or substantially all of the assets of the Corporation, shall be deemed to be
a liquidation, dissolution or winding up of the Corporation within the meaning
of this Section 6.

         Section 7. CONSOLIDATION, MERGER, ETC. In case the Corporation shall
enter into any consolidation, merger, combination or other transaction in which
the shares of common stock are exchanged for or changed into other stock or
securities, cash and/or any other property, then in any such case the shares of
Series A Preferred Stock shall at the same time be similarly exchanged or
changed in an amount per share (subject to the provision for adjustment
hereinafter set forth) equal to 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,
plus accrued and unpaid dividends, if any, payable with respect to the Series A
Preferred Stock. In the event the Corporation shall at any time after the Rights
Declaration Date (i) declare or pay any dividend on common stock payable in
shares of common stock, or (ii) 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 Series A Preferred Stock shall be adjusted by multiplying
such amount by a fraction, the numerator of which is the number of shares of
common stock outstanding immediately after such event and the denominator of
which is the number of shares of common stock that were outstanding immediately
prior to such event.

         Section 8. REDEMPTION. The shares of Series A Preferred Stock shall not
be redeemable.

         Section 9. RANKING. Unless otherwise provided in the Articles of
Organization of the Corporation or a Certificate of Vote of Directors
Establishing a Class of Stock relating to a subsequently-designated series of
preferred stock of the Corporation, the Series A Preferred Stock shall rank
junior to any other series of the Corporation's preferred stock subsequently
issued, as to the payment of dividends and the distribution of assets on
liquidation, dissolution or winding up and shall rank senior to the common
stock.

         Section 10. AMENDMENT. The Articles of Organization of the Corporation
and this Certificate of Vote of Directors Establishing a Class of Stock shall
not be amended in any manner which would materially alter or change the powers,
preferences or special rights of the Series A Preferred Stock so as to affect
them adversely (within the meaning of Section 77 of Chapter 156B

                                        5

<PAGE>   52


of the Massachusetts General Laws) without the affirmative vote of the holders
of two-thirds or more of the outstanding shares of Series A Preferred Stock,
voting separately as a class.

         Section 11. FRACTIONAL SHARES. Series A Preferred Stock may be issued
in whole shares or in any fraction of a share that is one one-hundredth
(1/100th) of a share or any integral multiple of such fraction, which shall
entitle the holder, in proportion to such holder's fractional shares, to
exercise voting rights, receive dividends, participate in distributions and to
have the benefit of all other rights of holders of Series A Preferred Stock. In
lieu of fractional shares, the Corporation may elect to make a cash payment as
provided in the Rights Agreement for fractions of a share other than one
one-hundredth (1/100th) of a share or any integral multiple thereof.





                                        6

<PAGE>   53



                                                                       Exhibit B


                           [Form of Right Certificate]



Certificate No. R-                                  ________ Rights



NOT EXERCISABLE AFTER SEPTEMBER 22, 2003 OR EARLIER IF NOTICE OF REDEMPTION IS
GIVEN. THE RIGHTS ARE SUBJECT TO REDEMPTION, AT THE OPTION OF MEDFORD BANCORP,
INC., AT $0.01 PER RIGHT ON THE TERMS SET FORTH IN THE AMENDED AND RESTATED
SHAREHOLDER RIGHTS AGREEMENT AMONG MEDFORD BANCORP, INC., MEDFORD SAVINGS BANK
AND STATE STREET BANK AND TRUST COMPANY, AS RIGHTS AGENT, DATED AS OF NOVEMBER
26, 1997 (THE "RIGHTS AGREEMENT"). UNDER CERTAIN CIRCUMSTANCES SPECIFIED IN
SECTION 7(e) OF THE RIGHTS AGREEMENT, RIGHTS BENEFICIALLY OWNED BY AN ACQUIRING
PERSON, AN ADVERSE PERSON OR AN ASSOCIATE OR AFFILIATE OF AN ACQUIRING PERSON OR
AN ADVERSE PERSON (AS SUCH TERMS ARE DEFINED IN THE RIGHTS AGREEMENT) AND ANY
SUBSEQUENT HOLDER OF SUCH RIGHTS MAY BECOME NULL AND VOID.


                                Right Certificate

                              MEDFORD BANCORP, 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
among MEDFORD BANCORP, INC. (the "Company"), MEDFORD SAVINGS BANK and STATE
STREET BANK AND TRUST COMPANY, as Rights Agent (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 the close of business on September
22, 2003 at the office or offices of the Rights Agent designated for such
purpose, or its successors as Rights Agent, one one-hundredth of a fully paid,
non-assessable share of the Series A Junior Participating Cumulative Preferred
Stock (the "Preferred Stock") of the Company, at a purchase price of $90.00 per
one one-hundredth of a share (the "Exercise Price"), upon presentation and
surrender of this Right Certificate with the Form of Election to Purchase and
the related Certificate duly executed. The number of Rights evidenced by this
Right Certificate (and the number of shares which may be purchased upon exercise
thereof) set forth above, and the Exercise Price per share set


<PAGE>   54



forth above, are the number and Exercise Price as of _____________, based on the
Preferred Stock as constituted at such date.

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

         As provided in the Rights Agreement, the Exercise Price and the number
of shares of Preferred Stock or other securities 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, 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, which
limitations of rights include the temporary suspension of the exercisability of
such Rights under the specific circumstances set forth in the Rights Agreement.
Copies of the Rights Agreement are on file at the principal office of the
Company and the designated office of the Rights Agent and are also available
upon written request to the Company or the Rights Agent.

         This Right Certificate, with or without other Right Certificates, upon
surrender at the office or offices of the Rights Agent designated for such
purpose, may be exchanged for another Right Certificate or Certificates of like
tenor and date evidencing Rights entitling the holder to purchase a like
aggregate number of shares of Preferred Stock as the Rights evidenced by the
Right Certificate or 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
Certificates for the number of whole Rights not exercised. If this Right
Certificate shall be exercised in whole or in part pursuant to Section 11(a)(ii)
of the Rights Agreement, the holder shall be entitled to receive this Right
Certificate duly marked to indicate that such exercise has occurred as set forth
in the Rights Agreement.

         Under certain circumstances, subject to the provisions of the Rights
Agreement, the Board of Directors of the Company at its option may exchange all
or any part of the Rights evidenced by this Certificate for shares of the
Company's Common Stock or Preferred Stock


<PAGE>   55



at an exchange ratio (subject to adjustment) of one share of Common Stock or one
one-hundredth of a share of Preferred Stock per Right.

         Subject to the provisions of the Rights Agreement, the Rights evidenced
by this Certificate may be redeemed by the Board of Directors of the Company at
its option at a redemption price of $0.01 per Right (payable in cash, Common
Stock or other consideration deemed appropriate by the Board of Directors).

         The Company is not obligated to issue fractional shares of stock upon
the exercise of any Right or Rights evidenced hereby (other than fractions which
are integral multiples of one one-hundredth of a share of Preferred Stock, which
may, at the election of the Company, be evidenced by depositary receipts). If
the Company elects not to issue such fractional shares, in lieu thereof a cash
payment will be made, as provided in the Rights Agreement.

         No holder of this Right Certificate, as such, shall be entitled to vote
or receive dividends or be deemed for any purpose the holder of shares of
Preferred Stock, Common Stock or 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 an authorized signatory of the Rights
Agent.

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

[Corporate Seal]                             MEDFORD BANCORP, INC.


Attested:
                                             By_________________________________
                                             Name:
By___________________________                Title: [Chairman, Vice Chairman,
[Clerk or Assistant Clerk]                          President or Vice President]




<PAGE>   56



Countersigned:

STATE STREET BANK AND
  TRUST COMPANY,
  as Rights Agent



____________________________
Authorized Signatory

Date of countersignature:





<PAGE>   57



                   [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

Signature Guaranteed: ____________________


                                   CERTIFICATE


        The undersigned hereby certifies by checking the appropriate boxes that:

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

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


Dated: _____________, _____                 _______________________________
                                            Signature



<PAGE>   58



                                     NOTICE


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








<PAGE>   59



                          FORM OF ELECTION TO PURCHASE

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


To MEDFORD BANCORP, INC.:

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

Please insert social security
or other identifying taxpayer number: ____________________


_____________________________________________________________
             (Please print name and address)

_____________________________________________________________


         If such number of Rights shall not be all the Rights evidenced by this
Right Certificate or if the Rights are being exercised pursuant to Section
11(a)(ii) of the Rights Agreement, a new Right Certificate for the balance of
such Rights shall be registered in the name of and delivered to:

Please insert social security
or other identifying taxpayer number: ____________________


_____________________________________________________________
             (Please print name and address)

_____________________________________________________________

_____________________________________________________________


Dated: _____________, _____

                                            _______________________________
                                            Signature


Signature Guaranteed: ____________________



<PAGE>   60


                                   CERTIFICATE


        The undersigned hereby certifies by checking the appropriate boxes that:

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

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



Dated: _____________, _____                 _______________________________
                                            Signature





                                     NOTICE

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




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