GREATER BAY BANCORP
8-A12G, 1998-11-25
NATIONAL COMMERCIAL BANKS
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<PAGE>
 
                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549


                                   FORM 8-A


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


                              GREATER BAY BANCORP
            -----------------------------------------------------
            (Exact name of registrant as specified in its charter)


             California                                  77-0387041
- -------------------------------------------------------------------------------
(State of incorporation or organization)      (IRS Employer Identification No.)



2860 West Bayshore Road, Palo Alto, California                     94303
- --------------------------------------------------------------------------------
   (Address of principal executive offices)                      (Zip Code)



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


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

            None                               None


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


                        Preferred Share Purchase Rights
                        -------------------------------
                                (Title of Class)
<PAGE>
 
Item 1.  Description of Securities to be Registered

          On November 17, 1998, the Board of Directors of GREATER BAY BANCORP
(the "Company") declared a dividend of one share purchase right (a "Right") for
each outstanding share of common stock, no par value (the "Common Shares"), of
the Company.  The dividend is payable on November 30, 1998 (the "Record Date")
to the shareholders of record on that date.  Each Right entitles the registered
holder to purchase from the Company one one-hundredth of a share (a "Unit") of
Series A Preferred Stock (the "Preferred Stock") of the Company, at a price of
$145.00 per Unit (the "Purchase Price"), subject to adjustment.  The description
and terms of the Rights are set forth in a Rights Agreement (the "Rights
Agreement") between the Company and NORWEST BANK MINNESOTA, N.A., as Rights
Agent (the "Rights Agent").

          Until the earliest to occur of (a) 10 days following a public
announcement that a person or group of affiliated or associated persons (an
"Acquiring Person") has acquired, or obtained the right to acquire, beneficial
ownership or record ownership of 10% or more of the outstanding Common Shares;
(b) 10 days following the commencement of, or announcement of an intention to
make, a tender offer or exchange offer the consummation of which would result in
the beneficial ownership or record ownership by a person or group of 10% or more
of such outstanding Common Shares; or (c) the date a person or group of
affiliated or associated persons is or becomes the beneficial or record owner of
10% or more of the outstanding Common Shares and (i) the actions such person
proposes to take are likely to have a material adverse impact on the business or
prospects of the Company; (ii) such person intends to cause the Company to
repurchase the Common Shares owned by such person; (iii) such person exercises
or attempts to exercise a controlling influence over the Company; or (iv) such
person transfers all or a portion of such Common Shares in a manner that results
in a person owning 9.9% or more of the Common Shares (an "Adverse Person") (the
earliest of such dates being called the "Distribution Date"), the Rights will be
evidenced, with respect to any of the Common Share certificates outstanding as
of the Record Date, by such Common Share certificate with a copy of a Summary of
Rights attached thereto.

          As of the date of adoption of the Rights Agreement, no Acquiring
Person or Adverse Person exists for purposes of the Rights Agreement.

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

                                       2
<PAGE>
 
record of the Common Shares as of the close of business on the Distribution Date
and such separate Right Certificates alone will evidence the Rights.

          The Rights are not exercisable until the Distribution Date.  The
Rights will expire on November 17, 2008 (the "Final Expiration Date"), unless
the Final Expiration Date is extended or unless the Rights are earlier redeemed
by the Company, in each case, as described below.

          The Purchase 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) upon the grant to holders of the Preferred Stock of
certain rights or warrants to subscribe for or purchase Preferred Stock at a
price, or securities convertible into Preferred Stock with a conversion price,
less than the then 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 periodic cash dividends paid out of earnings or
retained earnings or dividends payable in Preferred Stock) or of subscription
rights or warrants (other than those referred to above).

          In the event that the Company is acquired in a merger or other
business combination transaction or 50% or more of its consolidated assets or
earning power are sold, each holder of a Right will thereafter have the right to
receive, upon the exercise thereof at the then current exercise price of the
Right, that number of shares of common stock of the acquiring company which at
the time of such transaction will have a market value of two times the exercise
price of the Right.  In the event that any Person becomes an Acquiring Person or
an Adverse Person, each holder of a Right, other than Rights beneficially owned
by the Acquiring Person or Adverse Person (which will thereafter be void), will
thereafter have the right to receive upon exercise that number of Units of
Preferred Stock having a market value of two times the exercise price of the
Right.

          At any time after the date an Acquiring Person obtains 10% or more of
the Company's Common Shares and prior to the acquisition by the Acquiring Person
of 50% of the outstanding Common Shares, the Company's Board of Directors may
exchange the Rights (other than Rights owned by the Acquiring Person or its
affiliates), in whole or in part, for Common Shares at an exchange ratio of one
Common Share per Right (subject to adjustment).

          With certain exceptions, no adjustment in the Purchase Price will be
required until cumulative adjustments require an adjustment of at least 1% in
such Purchase Price.  No fractional Units of Preferred Stock (other than
fractions that are integral multiples of one one-hundredths) will be issued and
in lieu thereof, an adjustment in cash will be made based on the market price of
the Preferred Stock on the last trading day prior to the date of exercise.

                                       3
<PAGE>
 
          At any time prior to the date a Person becomes an Acquiring Person or
an Adverse Person, the Board of Directors of the Company may redeem the Rights
in whole, but not in part, at a price of $.001 per Right (the "Redemption
Price").  Immediately upon any redemption of the Rights, the right to exercise
the Rights will terminate and the only right of the holders of Rights will be to
receive the Redemption Price.

          The terms of the Rights may be amended by the Board of Directors of
the Company without the consent of the holders of the Rights, including an
amendment to extend the Final Expiration Date and, provided there is no
Acquiring Person or Adverse Person, to extend the period during which the Rights
may be redeemed, except that from and after such time as any person becomes an
Acquiring Person or an Adverse Person no such amendment may adversely affect the
interests of the holders of the Rights.

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

Item 2.  Exhibits

  Exhibit No.     Description
  -----------     -----------

       1          Rights Agreement, dated as of November 17, 1998, between the 
                  Company and Norwest Bank Minnesota, N.A., as Rights Agent.
 
       2          Certificate of Determination for the Series A Preferred Stock 
                  (attached as Exhibit A to Rights Agreement).
 
       3          Right Certificate (attached as Exhibit B to Rights 
                  Agreement). Pursuant to the Rights Agreement, printed Right
                  Certificates will not be mailed until the Distribution Date as
                  defined therein.
 
       4          Summary of Rights to Purchase Preferred Shares (attached as 
                  Exhibit C to Rights Agreement).

                                       4
<PAGE>
 
                                   SIGNATURE

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



                                       GREATER BAY BANCORP



Date:  November 23, 1998               By: /s/ Steven C. Smith
                                          --------------------------------
                                           Steven C. Smith
                                           Executive Vice President, Chief
                                           Operating Officer and Chief
                                           Financial Officer

                                       5
<PAGE>
 
                                 EXHIBIT INDEX

  Exhibit No.     Description
  -----------     -----------

       1          Rights Agreement, dated as of November 17, 1998, between the 
                  Company and Norwest Bank Minnesota, N.A., as Rights Agent.
 
       2          Certificate of Determination for the Series A Preferred Stock 
                  (attached as Exhibit A to Rights Agreement).
 
       3          Right Certificate (attached as Exhibit B to Rights 
                  Agreement). Pursuant to the Rights Agreement, printed Right
                  Certificates will not be mailed until the Distribution Date as
                  defined therein.
 
       4          Summary of Rights to Purchase Preferred Shares (attached as 
                  Exhibit C to Rights Agreement).

                                       6

<PAGE>

                                                                       EXHIBIT 1

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

                              GREATER BAY BANCORP

                                      AND

                         NORWEST BANK MINNESOTA, N. A.

                                  RIGHTS AGENT

                                RIGHTS AGREEMENT

                         DATED AS OF NOVEMBER 17, 1998


                         -----------------------------
<PAGE>
 
                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                    Page
                                                                                    ----
<S>                                                                                 <C>
Section 1.  Certain Definitions....................................................   1
 
Section 2.  Appointment of Rights Agent............................................   4
 
Section 3.  Issue of Right Certificates............................................   4
 
Section 4.  Form of Right Certificates.............................................   6
 
Section 5.  Countersignature and Registration......................................   6
 
Section 6.  Transfer, Split Up, Combination and Exchange of Right Certificates;
             Mutilated, Destroyed, Lost or Stolen Right Certificates...............   7
 
Section 7.  Exercise of Rights and Expiration Date of Rights.......................   7
 
Section 8.  Cancellation and Destruction of Right Certificates.....................   8
 
Section 9.  Reservation and Availability of Preferred Shares.......................   8
 
Section 10.  Preferred Shares Record Date..........................................   9
 
Section 11.  Purchase Price and Adjustments........................................   9
 
Section 12.  Certificate of Adjusted Purchase Price or Number of Shares............  15
 
Section 13.  Consolidation, Merger or Sale or Transfer of Assets or Earning Power..  15
 
Section 14.  Fractional Rights and Fractional Shares...............................  16
 
Section 15.  Rights of Action......................................................  17
 
Section 16.  Agreement of Right Holders............................................  17
 
Section 17.  Right Certificate Holder Not Deemed a Shareholder.....................  17
 
Section 18.  Concerning the Rights Agent...........................................  18
 
Section 19.  Merger or Consolidation or Change of Name of Rights Agent.............  18
 
Section 20.  Duties of Rights Agent................................................  19
</TABLE> 

                                       i
<PAGE>
 
<TABLE> 
<S>                                                                                 <C> 
Section 21.  Change of Rights Agent................................................  20
 
Section 22.  Issuance of New Right Certificates....................................  21
 
Section 23.  Redemption............................................................  21
 
Section 24.  Exchange..............................................................  21
 
Section 25.  Notice of Certain Events..............................................  22
 
Section 26.  Notices...............................................................  23
 
Section 27.  Supplements and Amendments............................................  24
 
Section 28.  Successors............................................................  24
 
Section 29.  Benefits of this Agreement............................................  24
 
Section 30.  Determinations and Actions by the Board of Directors..................  24
 
Section 31.  Severability..........................................................  25
 
Section 32.  Governing Law.........................................................  25
 
Section 33.  Counterparts..........................................................  25
 
Section 34.  Descriptive Headings..................................................  25
</TABLE>
Exhibit A - Certificate of Determination

Exhibit B - Form of Right Certificate

Exhibit C - Summary of Rights to Purchase Preferred Shares


                                      ii
<PAGE>
 
                                RIGHTS AGREEMENT
                                ----------------

          Agreement, dated as of November 17, 1998, between GREATER BAY BANCORP,
a California corporation (the "Company"), and NORWEST BANK MINNESOTA, N. A. (the
"Rights Agent").

          The Board of Directors of the Company has authorized and declared a
dividend of one preferred share purchase right (a "Right") for each Common Share
(as hereinafter defined) of the Company outstanding on November 30, 1998 (the
"Record Date"), each Right representing the right to purchase one one-hundredth
of a share (a "Unit") of Preferred Stock (as hereinafter defined), upon the
terms and subject to the conditions herein set forth, and has further authorized
and directed the issuance of one Right with respect to each Common Share that
shall become outstanding between the Record Date and the earliest of the
Distribution Date, the Redemption Date and the Final Expiration Date (as such
terms are hereinafter defined).

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

          Section 1.  Certain Definitions.  For purposes of this Agreement,
                      -------------------                                  
the following terms have the meanings indicated:

          (a) "Acquiring Person" shall mean any Person (as such term is
hereinafter defined) who or which, together with all Affiliates and Associates
(as such terms are hereinafter defined) of such Person, shall become, after the
date hereof, the Beneficial Owner or Record Owner (as such terms are hereinafter
defined) of 10% or more of the Common Shares then outstanding, but shall not
include the Company, any Subsidiary (as such term is hereinafter defined) of the
Company or any employee benefit plan of the Company or any Subsidiary of the
Company, or any entity holding Common Shares for or pursuant to the terms of any
such plan.  Notwithstanding the foregoing, no Person shall become an "Acquiring
Person" as the result of an acquisition of Common Shares by the Company which,
by reducing the number of shares outstanding, increases the proportionate number
of shares beneficially owned by such Person to 10% or more of the Common Shares
of the Company then outstanding.

          (b) "Adverse Person" shall mean any Person who or which, together with
all Affiliates and Associates of such Person (i) is or becomes the Beneficial
Owner or Record Owner of 10% or more of the Common Shares then outstanding, and
at least a majority of the Board of Directors of the Company who are not
officers of the Company, after reasonable inquiry and investigation, including
consultation with such persons as such directors shall deem appropriate, shall
conclude that the effect of such stock ownership, in the light of the actions
which the Person proposes or is likely to take, is potentially materially
adverse to the Company's business, assets, competitive position, prospects or
other shareholders; (ii) is or becomes the Beneficial Owner or Record Owner of
10% or more of the Common Shares then outstanding and at least a majority of the
Board of Directors of the Company who are not officers of the Company determine,
after reasonable inquiry and investigation, including consultation with such
persons as such directors shall deem appropriate, that (a) such Beneficial
Ownership or Record Ownership by such Person is intended to cause the Company to
repurchase the Common Shares owned by such Person or to 

                                       1
<PAGE>
 
cause pressure on the Company to take action or enter into a transaction or
series of transactions intended to provide such Person with short-term financial
gain or any economic benefit not otherwise available to other shareholders under
circumstances where the Board of Directors of the Company determines that the
best long-term interests of the Company and all its stockholders 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 or Record 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 or its shareholders; (iii) is or becomes the Beneficial
Owner or Record Owner of 10% or more of the Common Shares then outstanding and
exercises or attempts to exercise, directly or indirectly, a controlling
influence over the management or policies of the Company or otherwise exercises
"control" of the Company, as such term is defined in 12 C.F.R. (S)225.2(e); or
(iv) is or becomes the Beneficial Owner or Record Owner of 10% or more of the
Common Shares then outstanding and sells, transfers, assigns or otherwise
disposes of all or a portion of such Common Shares in a manner that results in a
Person owning 9.9% or more of the Common Shares then outstanding.

          (c) "Affiliate" and "Associate" shall have the respective meanings
ascribed to such terms in Rule 12b-2 of the General Rules and Regulations under
the Securities Exchange Act of 1934, as amended (the "Exchange Act"), as in
effect on the date of this Agreement.
 
          (d) A Person shall be deemed the "Beneficial Owner" of and shall
be deemed to "beneficially own" any securities:

              (i)   which such Person or any of such Person's Affiliates or
          Associates beneficially owns, directly or indirectly;

              (ii)  which such Person or any of such Person's Affiliates
          or Associates has (A) the right to acquire (whether such right is
          exercisable immediately or only after the passage of time or the
          receipt of regulatory approvals or both) pursuant to any agreement,
          arrangement or understanding (other than customary agreements with and
          between underwriters and selling group members with respect to a bona
          fide public offering of securities), or upon the exercise of
          conversion rights, exchange rights, rights (other than these 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, or (2) securities which a Person or any of such Person's
          Affiliates or Associates may be deemed to have the right to acquire
          pursuant to any merger or other acquisition agreement between the
          Company and such Person (or one or more of such Person's Affiliates or
          Associates) if such agreement has been approved by the Board of
          Directors of the Company prior to there being an Acquiring Person; or
          (B) the right to vote pursuant to any agreement, arrangement or
          understanding; provided, however, that a Person shall not be deemed
          the Beneficial Owner of, or to beneficially own, any security if the
          agreement, 

                                       2
<PAGE>
 
          arrangement or understanding to vote such security (1) arises solely
          from a revocable proxy or consent given to such Person in response to
          a public proxy or consent solicitation made pursuant to, and in
          accordance with, the applicable rules and regulations of the Exchange
          Act and (2) is not also then reportable on Schedule 13D under the
          Exchange Act (or any comparable or successor report), or

              (iii) which are beneficially owned, directly or indirectly,
          by any other Person with which such Person or any of such Person's
          Affiliates or Associates has any agreement, arrangement or
          understanding (other than customary agreements with and between
          underwriters and selling group members with respect to a bona fide
          public offering of securities) for the purpose of acquiring, holding,
          voting (except to the extent contemplated by the proviso to Section
          1(d)(ii)(B)) or disposing of any securities of the Company; provided,
          however, that in no case shall an officer or director of the Company
          be deemed (A) the Beneficial Owner of any securities beneficially
          owned by another officer or director of the Company solely by reason
          of actions undertaken by such persons in their capacity as officers or
          directors of the Company or (B) the Beneficial Owner of securities
          held of record by the trustee of any employee benefit plan of the
          Company or any Subsidiary of the Company for the benefit of any
          employee of the Company or any Subsidiary of the Company, other than
          the officer or director, by reason of any influence that such officer
          or director may have over the voting of the securities held in the
          plan.

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

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

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

          (g) "Common Shares" when used with reference to the Company shall mean
the shares of common stock, no par value, of the Company.  "Common Shares" when
used with reference to any Person other than the Company shall mean the capital
stock (or equity interest) with the greatest voting power of such other Person
or, if such other Person is a Subsidiary of another Person, the Person or
Persons which ultimately control such first-mentioned Person.

          (h) "Company" shall have the meaning set forth in the introduction to 
this Agreement.

          (i) "Distribution Date" shall have the meaning set forth in Section 
3 hereof.

                                       3
<PAGE>
 
          (j) "Final Expiration Date" shall have the meaning set forth in
Section 7 hereof.

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

          (l) "Preferred Stock" shall mean the Series A Preferred Stock, no par
value, of the Company having the rights and preferences set forth in the form of
Certificate of Determination attached to this Agreement as Exhibit A.

          (m) A "Record Owner" of any securities shall mean the Person whose
name appears on the stock transfer books of a company as the registered owner of
such securities.

          (n) "Redemption Date" shall have the meaning set forth in Section 7 
hereof.

          (o) "Shares Acquisition Date" shall mean the first date of public
announcement by the Company or an Acquiring Person that an Acquiring Person has
become such.

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

          (q)  "Unit" shall have the meaning set forth in the introduction to
this Agreement.

          (r) "Voting Stock" shall mean (i) the Common Shares and (ii) any other
shares of capital stock of the Company entitled to vote generally in the
election of directors or entitled to vote together with the Common Shares in
respect of any merger, consolidation, sale of all or substantially all of the
Company's assets, liquidation, dissolution or winding up.

          Section 2.  Appointment of Rights Agent.  The Company hereby appoints
                      ---------------------------                              
the Rights Agent to act as agent for the Company and the holders of the Rights
(who, in accordance with Section 3 hereof, shall prior to the Distribution Date
also be the holders of the Common Shares) in accordance with the terms and
conditions hereof, and the Rights Agent hereby accepts such appointment.  The
Company may from time to time appoint such co-Rights Agents as it may deem
necessary or desirable.

          Section 3.  Issue of Right Certificates.  (a)  Until the earliest of
                      ---------------------------                             
(i) the tenth day after the Shares Acquisition Date;  (ii) the tenth day after
the date of the commencement of, or of the first public announcement of the
intention of any Person (other than the Company, any Subsidiary of the Company,
any employee benefit plan of the Company or of any Subsidiary of the Company or
any entity holding Common Shares for or pursuant to the terms of any such plan)
to commence, a tender or exchange offer the consummation of which would result
in any Person becoming the Beneficial Owner or Record Owner of Common Shares
aggregating 10% or 

                                       4
<PAGE>
 
more of the then outstanding Common Shares; or (iii) the date a Person becomes
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 Common Shares registered in the names of the holders thereof (which
certificates shall also be deemed to be Right Certificates) and not by separate
Right Certificates; and (y) the right to receive Right Certificates will be
transferable only in connection with the transfer of Common Shares. As soon as
practicable after the Distribution Date, the Company will prepare and execute,
the Rights Agent will countersign, and the Company will send or cause to be sent
(and the Rights Agent will, if requested, send) by first-class, insured, 
postage-prepaid mail, to each record holder of Common Shares as of the close of
business on the Distribution Date, at the address of such holder shown on the
records of the Company, a Right Certificate, in substantially the form of
Exhibit A hereto (a "Right Certificate"), evidencing one Right for each Common
Share so held. As of the Distribution Date, the Rights will be evidenced solely
by such Right Certificates.

          (b)  On the Record Date or as soon as practicable thereafter, the
Company will send a copy of a Summary of Rights to Purchase Common Shares, in
substantially the form of Exhibit C hereto (the "Summary of Rights"), by first-
class, postage-prepaid mail, to each Record Owner of Common Shares as of the
close of business on the Record Date, at the address of such holder shown on the
records of the Company.  With respect to certificates for Common Shares
outstanding as of the Record Date, until the Distribution Date, the Rights will
be evidenced by such certificates registered in the names of the holders thereof
together with a copy of the Summary of Rights attached thereto.  Until the
Distribution Date (or the earlier of the Redemption Date or Final Expiration
Date), the surrender for transfer of any certificate for Common Shares
outstanding on the Record Date, with or without a copy of the Summary of Rights
attached thereto, shall also constitute the transfer of the Rights associated
with the Common Shares represented thereby.

          (c) Certificates for Common Shares which become outstanding
(including, without limitation, reacquired Common Shares referred to in the last
sentence of this paragraph (c)) after the Record Date but prior to the earliest
of the Distribution Date, the Redemption Date or the Final Expiration Date shall
have impressed on, printed on, written on or otherwise affixed to them the
following legend:

          This certificate also evidences and entitles the holder hereof to
          certain rights as set forth in a Rights Agreement between GREATER BAY
          BANCORP, and NORWEST BANK MINNESOTA, N. A., dated as of November 17,
          1998 (the "Rights Agreement"), the terms of which are hereby
          incorporated herein by reference and a copy of which is on file at the
          principal executive offices of GREATER BAY BANCORP. 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. GREATER BAY BANCORP will mail to the holder of
          this certificate a copy of the Rights Agreement without charge after
          receipt of a written request thereof. 

                                       5
<PAGE>
 
          As described in the Rights Agreement, Rights issued to any Person who
          becomes an Acquiring Person or Adverse Person (as defined in the
          Rights Agreement) shall become null and void.

With respect to such certificates containing the foregoing legend, until the
Distribution Date, the Rights associated with the Common Shares represented by
such certificates shall be evidenced by such certificates alone, and the
surrender for transfer of any such certificate shall also constitute the
transfer of the Rights associated with the Common Shares represented thereby.
In the event that the Company purchases or acquires any Common Shares after the
Record Date but prior to the Distribution Date, any Rights associated with such
Common Shares shall be deemed cancelled and retired so that the Company shall
not be entitled to exercise any Rights associated with the Common Shares which
are no longer outstanding.

          Section 4.  Form of Right Certificates.  The Right Certificates (and
                      --------------------------                              
the forms of election to purchase Units of Preferred Stock and of assignment to
be printed on the reverse thereof) shall be substantially the same as Exhibit B
hereto and may have such marks of identification or designation and such
legends, summaries or endorsements printed thereon as the Company may deem
appropriate and as are not inconsistent with the provisions of this Agreement,
or as may be required to comply with any applicable law or with any rule or
regulation of any stock exchange or quotation system on which the Rights may
from time to time be listed, or to conform to usage.  Subject to the provisions
of Section 22 hereof, the Right Certificates shall entitle the holders thereof
to purchase such number of Units of Preferred Stock as shall be set forth
therein at the price per limit set forth therein (the "Purchase Price"), but the
number of such Units and the Purchase Price shall be subject to adjustment as
provided herein.

          Section 5.  Countersignature and Registration.  The Right Certificates
                      ---------------------------------                         
shall be executed on behalf of the Company by its Chairman of the Board, its
President, any of its Executive or Senior Vice Presidents or any of its Vice
Presidents, either manually or by facsimile signature, shall have affixed
thereto the Company's seal or a facsimile thereof, and shall be attested by the
Secretary or an Assistant Secretary, or the Treasurer or an Assistant Treasurer,
of the Company, either manually or by facsimile signature.  The Right
Certificates shall be manually or by facsimile signature countersigned by the
Rights Agent and shall not be valid for any purpose unless countersigned.  In
case any officer of the Company who shall have signed any of the Right
Certificates shall cease to be such officer of the Company before
countersignature by the Rights Agent and issuance and delivery by the Company,
such Rights Certificates, nevertheless, may be countersigned by the Rights Agent
and issued and delivered by the Company with the same force and effect as though
the person who signed such Right Certificates had not ceased to be such officer
of the Company; and any Right Certificate may be signed on behalf of the Company
by any person who, at the actual date of the execution of such Right
Certificate, shall be a proper officer of the Company to sign such Right
Certificate, although at the date of the execution of this Rights Agreement any
such person was not such an officer.

          Following the Distribution Date, the Rights Agent will keep or cause
to be kept, at its shareholder services office, 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 

                                       6
<PAGE>
 
Certificates, the number of Rights evidenced on its face by each of the Right
Certificates and the date of each of the Right Certificates.

          Section 6.  Transfer, Split Up, Combination and Exchange of Right
                      -----------------------------------------------------
Certificates; Mutilated, Destroyed, Lost or Stolen Right Certificates.  Subject
- ---------------------------------------------------------------------          
to the provisions of Section 14 hereof, at any time after the close of business
on the Distribution Date, and at or prior to the close of business on the
earlier of the Redemption Date or the Final Expiration Date, any Right
Certificate or Right Certificates (other than Right Certificates representing
Rights that have become void pursuant to Section 11(a)(ii) or that have been
exchanged pursuant to Section 24 hereof) may be transferred, split up, combined
or exchanged for another Right Certificate or Right Certificates, entitling the
registered holder to purchase a like number of Units of Preferred Stock as the
Right Certificate or Right Certificates surrendered then entitled such holder to
purchase.  Any registered holder desiring to transfer, split up, combine or
exchange any Right Certificate or Right Certificates shall make such request in
writing delivered to the Rights Agent, and shall surrender the Right Certificate
or Right Certificates to be transferred, split up, combined or exchanged at the
office of the Rights Agent.  Thereupon the Rights Agent shall countersign and
deliver to the person entitled thereto a Right Certificate or Right
Certificates, as the case may be, as so requested.  The Company may require
payment of a sum sufficient to cover any tax or governmental charge that may be
imposed in connection with any transfer, split up, combination or exchange of
Right Certificates.

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

          Section 7.  Exercise of Rights and Expiration Date of Rights.  (a)
                      ------------------------------------------------       
The registered holder of any Right Certificate may exercise the Rights evidenced
thereby (except as otherwise provided herein) in whole or in part at any time
after the Distribution Date upon surrender of the Right Certificate, with the
form of election to purchase on the reverse side thereof duly executed, to the
Rights Agent, together with payment of the Purchase Price for each Unit of
Preferred Stock as to which the Rights are exercised, at or prior to the earlier
of (i) the close of business on November 17, 2008 (the "Final Expiration Date"),
(ii) the time at which the Rights are redeemed as provided in Section 23 hereof
(the "Redemption Date") or (iii) exchanged pursuant to Section 24 hereof.

          (b)  The Purchase Price for each Unit of Preferred Stock shall
initially be $145.00, shall be subject to adjustment from time to time as
provided in Sections 11 and 13 hereof and shall be paid in lawful money of the
United States of America in accordance with paragraph (c) below.

                                       7
<PAGE>
 
          (c)  Upon receipt of a Right Certificate representing exercisable
Rights, with the form of election to purchase duly executed, accompanied by
payment of the Purchase Price for the shares to be purchased and an amount equal
to any applicable transfer tax required to be paid by the holder of such Right
Certificate in accordance with Section 9 hereof by certified check, cashier's
check, bank draft or money order payable to the order of the Company or the
Rights Agent, the Rights Agent shall thereupon promptly (i) requisition from any
transfer agent of the Preferred Stock certificates for the number of Units of
Preferred Stock to be purchased and the Company hereby irrevocably authorizes
its transfer agent to comply with all such requests, (ii) when appropriate,
requisition from the Company the amount of cash to be paid in lieu of issuance
of fractional shares in accordance with Section 14 hereof, (iii) after receipt
of such certificates, cause the same to be delivered to or upon the order of the
registered holder of such Right Certificate, registered in such name or names as
may be designated by such holder and (iv) when appropriate, after receipt,
deliver such cash to or upon the order of the registered holder of such Right
Certificate.

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

          Section 8.  Cancellation and Destruction of Right Certificates.  All
                      --------------------------------------------------      
Right Certificates surrendered for the purpose of exercise, transfer, split up,
combination or exchange shall, if surrendered to the Company or to any of its
agents, be delivered to the Rights Agent for cancellation or in cancelled form,
or, if surrendered to the Rights Agent, shall be cancelled by it, and no Right
Certificates shall be issued in lieu thereof except as expressly permitted by
any of the provisions of this Rights Agreement.  The Company shall deliver to
the Rights Agent for cancellation and retirement, and the Rights Agent shall so
cancel and retire, any other Right Certificate purchased or acquired by the
Company otherwise than upon the exercise thereof.  The Rights Agent shall
deliver all cancelled Right Certificates to the Company.

          Section 9.  Reservation and Availability of Preferred Stock.  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
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 Rights.

          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
exercise of Rights shall, at the time of delivery of the certificates for such
shares (subject to payment of the Purchase Price), be duly and validly
authorized and issued and fully paid and nonassessable shares.

          The Company further covenants and agrees that it will pay when due and
payable any and all federal and state transfer taxes and charges which may be
payable in respect of the issuance or delivery of the Right Certificates or of
any 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, 

                                       8
<PAGE>
 
or the issuance or delivery of certificates or depositary receipts for the
Preferred Stock in a name other than that of, the registered holder of the Right
Certificate evidencing Rights surrendered for exercise or to issue or to deliver
any certificates or depositary receipts for Preferred Stock upon the exercise of
any Rights until any such tax shall have been paid (any such tax being payable
by the holder of such Right Certificate at the time of surrender) or until it
has been established to the Company's satisfaction that no such tax is due.

          Section 10.  Preferred Shares Record Date.  Each person in whose name
                       ----------------------------                            
any certificate for shares 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 represented thereby on, and such certificate shall be dated, the date
upon which the Right Certificate evidencing such Rights was duly surrendered and
payment of the Purchase Price (and any applicable transfer taxes) was made;
                                                                           
provided, however, that if the date of such surrender and payment is a date upon
- --------  -------                                                               
which the Preferred 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.  Prior to the exercise
of the Rights evidenced thereby, the holder of a Right Certificate shall not be
entitled to any rights of a shareholder of the Company 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.  Purchase Price and Adjustments.  The Purchase Price, the
                       ------------------------------                          
number of Units of Preferred Stock 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
Preferred Stock, (B) subdivide the outstanding Preferred Stock, (C) combine the
outstanding shares of 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), the Purchase Price in effect at the
time of the record date for such dividend or of the effective date of such
subdivision, combination or reclassification, and the number and kind of shares
of capital stock issuable on such date, shall be proportionately adjusted so
that the holder of any Right exercised after such time shall be entitled to
receive the aggregate number and kind of shares of capital stock which, if such
Right had been exercised immediately prior to such date and at a time when the
Preferred Stock transfer books of the Company were open, he or she would have
owned upon such exercise and been entitled to receive by virtue of such
dividend, subdivision, combination or reclassification.

              (ii)  In the event any Person shall become an Acquiring Person 
or an Adverse Person, proper provision shall be made so that each holder of a
Right, except as provided below, shall thereafter have a right to receive, upon
exercise thereof at a price equal to the then current Purchase Price multiplied
by the number of Units

                                       9
<PAGE>
 
of Preferred Stock for which a Right is then exercisable, in accordance with the
terms of this Agreement, such number of Units of Preferred Stock of the Company
as shall equal the result obtained by (A) multiplying the then current Purchase
Price by the then number of Units of Preferred Stock for which a Right is then
exercisable and dividing that product by (B) 50% of the then current per share
market price of the Preferred Stock (determined pursuant to Section 11(d)) on
the date such Person became an Acquiring Person or an Adverse Person.

          Notwithstanding the foregoing, from and after the occurrence of such
event, any Rights that are or were acquired or beneficially owned by an
Acquiring Person or an Adverse Person (or any Associate or Affiliate of such
Acquiring Person or Adverse Person) shall be void and any holder of such Rights
shall thereafter have no right to exercise such Rights under any provision of
this Agreement.  No Right Certificate shall be issued pursuant to Section 3 that
represents Rights beneficially owned by an Acquiring Person or an Adverse Person
or any Associate or Affiliate thereof and no Right Certificate shall be issued
at any time upon the transfer of any Rights to an Acquiring Person or an Adverse
Person or any Associate or Affiliate thereof or to any nominee of such Acquiring
Person, Adverse Person, Associate or Affiliate.  Any Right Certificate delivered
to the Rights Agent for transfer to an Acquiring Person shall be cancelled.

              (iii)  In the event that there shall not be sufficient shares of
Preferred Stock issued but not outstanding or authorized but unissued to permit
the exercise in full of the Rights in accordance with the foregoing subparagraph
(ii), the Company shall take all such action as may be necessary to authorize
additional shares of Preferred Stock for issuance upon exercise of the Rights.

              (iv)   The failure by the Board of Directors of the Company to 
declare a Person to be an Adverse Person following such Person becoming the
Beneficial Owner or Record Owner of 10% or more of the outstanding Common Shares
shall not imply that such Person is not an Adverse Person or limit the Board of
Directors' right at any time in the future to declare such Person to be an
Adverse Person.

          (b)  In case the Company shall fix a record date for the issuance of
rights, options or warrants to all holders of shares of Preferred Stock
entitling them (for a period expiring within 45 calendar days after such record
date) to subscribe for or purchase shares of Preferred Stock (or shares having
the same rights, privileges and preferences thereof ("equivalent preferred
shares")) or securities convertible into Preferred Stock or equivalent preferred
shares at a price per share of Preferred Stock or equivalent preferred share (or
having a conversion price per share, if a security convertible into Preferred
Stock or equivalent preferred shares) less than the then current per share
market price of the Preferred Stock (as defined in Section 11(d)) on such record
date, the Purchase Price to be in effect after such record date shall be
determined by multiplying the Purchase Price in effect immediately prior to such
record date by a fraction, the numerator of which shall be the number of shares
of Preferred Stock outstanding on such record date plus the number of shares of
Preferred Stock which the aggregate offering price of the total number of shares
of Preferred Stock and/or equivalent preferred shares so to be offered (and/or
the aggregate initial conversion price of the convertible securities so to be
offered) would purchase at such current market price and the denominator of
which shall be the number of shares of Preferred Stock outstanding on such
record date plus the number of additional shares of Preferred Stock and/or
equivalent preferred shares to be offered for subscription or purchase (or into
which 

                                       10
<PAGE>
 
the convertible securities so to be offered are initially convertible). In case
such subscription price may be paid in a consideration part or all of which
shall be in a form other than cash, the value of such consideration shall be as
determined in good faith by the Board of Directors of the Company, whose
determination shall be described in a statement filed with the Rights Agent.
Shares of Preferred Stock owned by or held for the account of the Company shall
not be deemed outstanding for the purpose of any such computation. Such
adjustment shall be made successively whenever such a record date is fixed; and
in the event that such rights or warrants are not so issued, the Purchase Price
shall be adjusted to be the Purchase Price which would then be in effect if such
record date had not been fixed.

          (c)  In case the Company shall fix a record date for the making of a
distribution to all holders of the 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
or assets (other than a regular quarterly cash dividend or a dividend payable in
shares of Preferred Stock) or subscription rights or warrants (excluding those
referred to in Section 11(b)), the Purchase Price to be in effect after such
record date shall be determined by multiplying the Purchase Price in effect
immediately prior to such record date by a fraction, the numerator of which
shall be the then current per share market price of the Preferred Stock (as
defined in Section 11(d)) on such record date, less the fair market value (as
determined in good faith by the Board of Directors of the Company, whose
determination shall be described in a statement filed with the Rights Agent) of
the portion of the assets or evidences of indebtedness so to be distributed or
of such subscription rights or warrants applicable to one share of Preferred
Stock and the denominator of which shall be such current per share market price
of the Preferred Stock.  Such adjustments shall be made successively whenever
such a record date is fixed; and in the event that such distribution is not so
made, the Purchase Price shall again be adjusted to be the Purchase Price which
would then be in effect if such record date had not been fixed.

          (d) (i)  For the purpose of any computation hereunder, the "current
per share market price" of any security (a "Security" for the purpose of this
Section 11(d)(i)) on any date shall be deemed to be the average of the daily
closing prices per share of such Security for the 30 consecutive Trading Days
(as such term is hereinafter defined) immediately prior to such date; provided,
                                                                      -------- 
however, that in the event that the current per share market price of the
- -------                                                                  
Security is determined during a period following the announcement by the issuer
of such Security of (A) a dividend or distribution on such Security payable in
shares of such Security or securities convertible into such shares, or (B) any
subdivision, combination or reclassification of such Security and prior to the
expiration of 30 Trading Days after the ex-dividend date for such dividend or
distribution, or the record date for such subdivision, combination or
reclassification, then, and in each such case, the current per share market
price shall be appropriately adjusted to reflect the current market price per
share equivalent of such Security.  The closing price for each day shall be the
last sale price, regular way, or, in case no such sale takes place on such day,
the average of the closing bid and asked prices, regular way, in either case as
reported in the principal consolidated transaction reporting system with respect
to securities listed or admitted to trading on the New York Stock Exchange or,
if the Security is not listed or admitted to trading on the New York Stock
Exchange, as reported in the principal consolidated transaction reporting system
with respect to securities listed on the principal national securities exchange
on which the Security is listed or admitted to trading or, if the Security is
not listed or admitted to trading on 

                                       11
<PAGE>
 
any national securities exchange, the last quoted price or, if not so quoted,
the average of the high bid and low asked prices in the over-the-counter market,
as reported by the National Association of Securities Dealers, Inc. Automated
Quotations System ("NASDAQ") or such other system then in use, or, if on any
such date the Security is not quoted by any such organization, the average of
the closing bid and asked prices as furnished by a professional market maker
making a market in the Security selected by the Board of Directors of the
Company. The term "Trading Day" shall mean a day on which the principal national
securities exchange on which the Security is listed or admitted to trading is
open for the transaction of business or, if the Security is not listed or
admitted to trading on any national securities exchange, a Business Day.

              (ii)   For the purpose of any computation hereunder, the 
"current per share market price" of the Preferred Stock shall be determined in
accordance with the method set forth in Section 11(d)(i) (appropriately adjusted
to reflect any stock split, stock dividend or similar transaction occurring
after the date hereof). If the Preferred Stock is not publicly held or so listed
or traded, "current per share market price" shall mean the fair value per share
as determined in good faith by the Board of Directors of the Company, whose
determination shall be described in a statement filed with the Rights Agent.

          (e)  No adjustment in the Purchase Price shall be required unless such
adjustment would require an increase or decrease of at least 1% in the Purchase
Price; provided, however, that any adjustments which by reason of this Section
       --------  -------                                                      
11(e) are not required to be made shall be carried forward and taken into
account in any subsequent adjustment. All calculations under this Section 11
shall be made to the nearest cent or to the nearest one-hundredth of a share, as
the case may be.  Notwithstanding the first sentence of this Section 11(e), any
adjustment required by this Section 11 shall be made no later than the earlier
of (i) three years from the date of the transaction which requires such
adjustment or (ii) the date of the expiration of the right to exercise any
Rights.

          (f)  If as a result of an adjustment made pursuant to Section 11(a),
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) through (c), inclusive, and the
provisions of Sections 7, 9, 10 and 13 with respect to the Preferred Stock shall
apply on like terms to any such other shares.

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

          (h)  Unless the Company shall have exercised its election as provided
in Section 11(i), upon each adjustment of the Purchase Price as a result of the
calculations made in 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 Purchase Price, that number of Units of Preferred
Stock (calculated to the nearest one-hundredth) obtained by (i) multiplying (x)
the 

                                       12
<PAGE>
 
number of shares covered by a Right immediately prior to this adjustment by
(y) the Purchase Price in effect immediately prior to such adjustment of the
Purchase Price and (ii) dividing the product so obtained by the Purchase Price
in effect immediately after such adjustment of the Purchase Price.

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

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

          (k)  Before taking any action that would cause an adjustment reducing
the Purchase Price below the then par value, if any, of the 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 Purchase Price.

          (l)  In any case in which this Section 11 shall require that an
adjustment in the Purchase Price be made effective as of a record date for a
specified event, the Company may elect to defer until the occurrence of such
event the issuing to the holder of any Right exercised after such record date of
the Preferred Stock and other capital stock or 

                                       13
<PAGE>
 
securities of the Company, if any, issuable upon such exercise over and above
the Preferred Stock and other capital stock or securities of the Company, if
any, issuable upon such exercise on the basis of the Purchase Price in effect
prior to such adjustment; provided, however, that the Company shall deliver to
                          --------  -------
such holder a due bill or other appropriate instrument evidencing such holder's
right to receive such additional shares upon the occurrence of the event
requiring such adjustment.

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

          (n)  The Company shall not, at any time after the Distribution Date,
(i) consolidate with any other Person (other than a Subsidiary of the Company in
a transaction which complies with Section 11 (o)), (ii) merge with or into any
other Person (other than a Subsidiary of the Company in a transaction which
complies with Section 11 (o), or (iii) sell or transfer (or permit any
Subsidiary to sell or transfer), in one transaction, or a series of
transactions, assets or earning power aggregating more than 50% of the assets or
earning power of the Company and its Subsidiaries (taken as a whole) to any
other Person or Persons (other than the Company and/or any of its Subsidiaries
in one or more transactions each of which complies with Section 11(o)), if (x)
at the time of or immediately after such consolidation, merger or sale there are
any rights, warrants or other instruments or securities outstanding or
agreements in effect which would substantially diminish or otherwise eliminate
the benefits intended to be afforded by the Rights or (y) prior to,
simultaneously with or immediately after such consolidation, merger or sale, the
Person shall have distributed or otherwise transferred to its shareholders or
other persons holding an equity interest in such Person Rights previously owned
by such Person or any of its Affiliates and Associates; provided, however, this
Section 11(n) shall not affect the ability of any Subsidiary of the Company to
consolidate with, merge with or into, or sell or transfer assets or earnings
power to, any other Subsidiary of the Company.

          (o)  After the Distribution Date, the Company shall not, except as
permitted by Section 23 or Section 27, take (or permit any Subsidiary to take)
any action if at the time such action is taken it is reasonably foreseeable that
such action will diminish substantially or otherwise eliminate the benefits
intended to be afforded by the Rights.

          (p)  In the event that, at any time after the date of this Agreement
and prior to the Distribution Date, the Company shall (i) declare or pay any
dividend on outstanding Common Shares payable in Common Shares or (ii) effect a
subdivision, combination or consolidation of the Common Shares (by
reclassification or otherwise than by payment of dividends in shares of Common
Shares) into a greater or lesser number of Common Shares, then in any such case
the number of Units of Preferred Stock purchasable after such event upon proper
exercise of each Right shall be determined by multiplying the number of Units of
Preferred Stock so purchasable 

                                       14
<PAGE>
 
immediately prior to such event by a fraction, the numerator of which is the
number of Common Shares outstanding immediately before such event and the
denominator of which is the number of Common Shares outstanding immediately
after such event. The adjustments provided for in this Section 11(p) shall be
made successively whenever such a dividend is declared or paid or such a
subdivision, combination or consolidation is effected.

          Section 12.  Certificate of Adjusted Purchase Price or Number of
                       ---------------------------------------------------
Shares.  Whenever an adjustment is made as provided in Sections 11 and 13
- ------                                                                   
hereof, the Company shall promptly (a) prepare a certificate setting forth such
adjustment, and a brief statement of the facts accounting for such adjustment,
(b) file with the Rights Agent and with each transfer agent for the Common
Shares 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.
Notwithstanding the foregoing sentence, the failure by the Company to make such
certification or give such notice shall not affect the validity of or the force
or effect of the requirement for such adjustment.  The Rights Agent shall be
fully protected in relying on any such certificate and on any adjustment
contained therein and shall not be deemed to have knowledge of such adjustment
unless and until it shall have received such certificate.

          Section 13.  Consolidation, Merger or Sale or Transfer of Assets or
                       ------------------------------------------------------
Earning Power.  In the event, directly or indirectly, (a) the Company shall
- -------------                                                              
consolidate with, or merge with and into, any other person, (b) any Person shall
consolidate with the Company, or merge with and into the 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 Common Shares shall be changed
into or exchanged for stock or other securities of any other Person (or the
Company) or cash or any other property, or (c) the Company shall sell or
otherwise transfer (or one or more of its Subsidiaries shall sell or otherwise
transfer), in one or more transactions, assets or earning power aggregating 50%
or more of the assets or earning power of the Company and its Subsidiaries
(taken as a whole) to any other Person other than the Company or one or more of
its wholly-owned Subsidiaries, then, and in each such case, proper provision
shall be made so that (i) each holder of a Right (except as otherwise provided
herein) shall thereafter have the right to receive, upon the exercise thereof at
a price equal to the then current Purchase Price multiplied by the number of
Units of Preferred Stock for which a Right is then exercisable, in accordance
with the terms of this Agreement, such number of Common Shares of such other
Person (including the Company as successor thereto or as the surviving
corporation) as shall be equal to the result obtained by (x) multiplying the
then current Purchase Price by the number of Units of Preferred Stock for which
a Right is then exercisable and dividing that product by (y) 50% of the then
current per share market price of the Common Shares of such other Person
(determined pursuant to Section 11(d)) on the date of consummation of such
consolidation, merger, sale or transfer; (ii) the issuer of such Common Shares
shall thereafter be liable for, and shall assume, by virtue of such
consolidation, merger, sale or transfer, all the obligations and duties of the
Company pursuant to this Agreement; (iii) the term "Company" shall thereafter be
deemed to refer to such issuer; and (iv) such issuer shall take such steps
(including, but not limited to, the reservation of a sufficient number of its
Common Shares in accordance with Section 9 hereof) in connection with such
consummation as may be necessary to assure that the provisions hereof shall
thereafter be applicable, as nearly as reasonably may be, in relation to the
Common Shares thereafter deliverable upon the exercise of the Rights.  The
Company shall not enter into any transaction of 

                                       15
<PAGE>
 
the kind referred to in this Section 13 if at the time of such transaction there
are any rights, warrants, instruments or securities outstanding or any
agreements or arrangements which, as a result of the consummation of such
transaction, would eliminate or substantially diminish the benefits intended to
be afforded by the Rights. The Company shall not consummate any such
consolidation, merger, sale or transfer unless prior thereto the Company and
such issuer shall have executed and delivered to the Rights Agent a supplemental
agreement so providing. The provisions of this Section 13 shall similarly apply
to successive mergers or consolidations or sales or other transfers.

          Section 14.  Fractional Rights and Fractional Shares.
                       --------------------------------------- 

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

          (b)  The Company shall not be required to issue fractions of shares 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.  In lieu of fractional shares that are
not integral multiples of one one-hundredth, the Company shall pay to the
registered holders of Right Certificates at the time such Rights are exercised
as herein provided an amount in cash equal to the same fraction of the current
market value of one share of Preferred Stock as determined pursuant to Section
11(d).

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

                                       16
<PAGE>
 
          Section 15.  Rights of Action.  All rights of action in respect of
                       ----------------                                     
this Agreement, excepting the rights of action given to the Rights Agent under
Section 18 hereof, are vested in the respective registered holders of the Right
Certificates (and, prior to the Distribution Date, the registered holders of the
Common Shares); and any registered holder of any Right Certificate (or, prior to
the Distribution Date, of the Common Shares), without the consent of the Rights
Agent or of the holder of any other Right Certificates (or, prior to the
Distribution Date, of the Common Shares), may, in his or her own behalf and for
his or her own benefit, enforce, and may institute and maintain any suit, action
or proceeding against the Company to enforce, or otherwise act in respect of,
his or her right to exercise the Rights evidenced by such Right Certificate in
the manner provided in such Right Certificate and in this Agreement.  Without
limiting the foregoing or any remedies available to the holders of Rights, it is
specifically acknowledged that the holders of Rights would not have an adequate
remedy at law for any breach of this Agreement and will be entitled to specific
performance of the obligations under, and injunctive relief against actual or
threatened violations of, the obligations of any Person subject to this
Agreement.

          Section 16.  Agreement of Right Holders.  Every holder of a Right, by
                       --------------------------                              
accepting the same, consents and agrees with the Company and the Rights Agent
and with every other holder of a Right that:

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

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

          (c)  the Company and the Rights Agent may deem and treat the person in
whose name the Right Certificate (or, prior to the Distribution Date, the
associated Common Shares certificate) is registered as the absolute owner
thereof and of the Rights evidenced thereby (notwithstanding any notations of
ownership or writing on the Right Certificates or the associated Common Shares
certificate made by anyone other than the Company or the Rights Agent) for all
purposes whatsoever, and neither the Company nor the Rights Agent shall be
affected by any notice to the contrary; and

          (d)  notwithstanding anything in this Agreement to the contrary,
neither the Company nor the Rights Agent shall have any liability to any holder
of a Right or other Person as a result of its inability to perform any of its
obligations under this Agreement by reason of any preliminary or permanent
injunction or other order, decree 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 to
enacted by any governmental authority, prohibiting or otherwise restraining
performance of such obligation; provided, however, the Company must use its best
efforts to have any such order, decree or ruling lifted or otherwise overturned
as soon as possible.

          Section 17.  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 

                                       17
<PAGE>
 
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 that 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 meeting 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.  The Company agrees to pay
                       ---------------------------                            
to the Rights Agent reasonable compensation for all services rendered by it
hereunder and, from time to time, on demand of the Rights Agent, its reasonable
expenses and counsel fees and other disbursements incurred in the administration
and execution of this Agreement and the exercise and performance of its duties
hereunder.  The Company also agrees to indemnify the Rights Agent for, and to
hold it harmless against, any loss, liability, or expense, incurred without
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 cost and expenses
of defending against any claim of liability in the premises.

          The Rights Agent shall be protected and shall incur no liability for,
or in respect of any action taken, suffered or omitted by it in connection with
its administration of this Agreement in reliance upon any Right Certificate or
certificate for the shares of Preferred Stock or Common Shares or for other
securities of the Company, instrument of assignment or transfer, power of
attorney, endorsement, affidavit, letter, notice, direction, consent,
certificate, statement, or other paper or documents believed by it to be genuine
and to be signed, executed and, where necessary, verified or acknowledged, by
the proper person or persons, or otherwise upon the advice of counsel as set
forth in Section 20 hereof.

          Section 19.  Merger or Consolidation or Change of Name of Rights
                       ---------------------------------------------------
Agent.  Any corporation into which the Rights Agent or any successor Rights
Agent may be merged or with which it may be consolidated, or any corporation
resulting from any merger or consolidation to which the Rights Agent or any
successor Rights Agent shall be a party, or any corporation succeeding to the
corporate trust business of the Rights Agent or any successor Rights Agent,
shall be the successor to the Rights Agent under this Agreement without the
execution or filing of any paper or any further act on the part of any of the
parties hereto, provided that such corporation would be eligible for appointment
as a successor Rights Agent under the provisions of Section 21 hereof.  In case
at the time such successor Rights Agent shall succeed to the agency created by
this Agreement, any of the Right Certificates shall have been countersigned but
not delivered, any such successor Rights Agent may adopt the countersignature of
the predecessor Rights Agent and deliver such Right Certificates so
countersigned; and in case at that time any of the Right Certificates shall not
have been countersigned, any successor Rights Agent may countersign such Right
Certificates either in the name of the predecessor Rights Agent or in the name
of the successor Rights Agent; and in all such cases such Right Certificates
shall have the full force provided in the Right Certificates and in this
Agreement.

                                       18
<PAGE>
 
          In case at any time the name of the Rights Agent shall be changed and
at such time any of the Right Certificates shall have been countersigned but not
delivered, the Rights Agent may adopt the countersignature under its prior name
and deliver Right Certificates so countersigned; and in case at that time any of
the Right Certificates shall not have been countersigned, the Rights Agent may
countersign such Right Certificates either in its prior name or in its changed
name; and in all such cases such Right Certificates shall have the full force
provided in the Right Certificates and in this Agreement.

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

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

          (b)  Whenever in the performance of its duties under this Agreement
the Rights Agent shall deem it necessary or desirable that any fact or matter be
proved or established by the Company prior to taking or suffering any action
hereunder, such fact or matter (unless other evidence in respect thereof be
herein specifically prescribed) may be deemed to be conclusively proved and
established by a certificate signed by any one of the Chairman of the Board, the
President, any Executive or Senior Vice President, any Vice President, the
Treasurer or the Secretary of the Company and delivered to the Rights Agent; and
such certificate shall be full authorization to the Rights Agent for any action
taken or suffered in good faith by it under the provisions of this Agreement in
reliance upon such certificate.

          (c)  The Rights Agent shall be liable hereunder to the Company and any
other Person only for its own 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 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 or any
adjustment in the terms of the Rights (including the manner, method or amount
thereof) provided for in Section 3, 11, 13 or 23, or the ascertaining of the
existence of facts that would require any such change or adjustment (except with
respect to the exercise of Rights evidenced by Right Certificates after actual
notice that such change or adjustment is required); nor shall it by any act
hereunder be deemed to make 

                                       19
<PAGE>
 
any representation or warranty as to the authorization or reservation of any
shares of Preferred Stock to be issued pursuant to this Agreement or any Right
Certificate or as to whether any such shares will, when issued, be validly
authorized and issued, fully paid and nonassessable.

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

          (g)  The Rights Agent is hereby authorized and directed to accept
instructions with respect to the performance of its duties hereunder from any
one of the Chairman of the Board, the President, any Executive or Senior Vice
President, any Vice President, the Treasurer or the Secretary of the Company,
and to apply to such officers for advice or instructions in connection with its
duties, and it shall not be liable for any action taken or suffered by it in
good faith in accordance with instructions of any such officer or for any delay
in acting while waiting for those instructions.

          (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, or contract with or lend money to the Company or otherwise
act as fully and freely as though it were not Rights Agent under this Agreement.
Nothing herein shall preclude the Rights Agent from acting in any other capacity
for the Company or for any other legal entity.

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

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

                                       20
<PAGE>
 
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 corporation organized and doing business under the laws
of the United States or of any state of the United States, in good standing,
authorized under such laws to exercise corporate trust or stock transfer powers
and is subject to supervision or examination by federal or state authority and
which has at the time of its appointment as Rights Agent a combined capital and
surplus of at least $50 million. After appointment, the successor Rights Agent
shall be vested with the same power, 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 Preferred Stock and the Common Shares, and mail a notice thereof in writing
to the registered holders of the Right Certificates. Failure to give any notice
provided for in this Section 21, however, or any defect therein, shall not
affect the legality or validity of the resignation or removal of the Rights
Agent or the appointment of the successor Rights Agent, as the case may be.

          Section 22.  Issuance of New Right Certificates.  Notwithstanding any
                       ----------------------------------                      
of the provisions of this Agreement or of the Rights to the contrary, the
Company may, at its option, issue new Right Certificates evidencing Rights in
such form as may be approved by its Board of Directors to reflect any adjustment
or change in the Purchase Price and the number or kind or class of shares or
other securities or property purchasable under the Right Certificates made in
accordance with the provisions of this Agreement.

          Section 23.  Redemption.  (a) The Board of Directors of the Company
                       ----------                                            
may, at its option, at any time prior to the Shares Acquisition Date or such
time as any Person becomes an Acquiring Person or an Adverse Person, redeem all
but not less than all the then outstanding Rights at a redemption price of $.001
per Right, appropriately adjusted to reflect any stock split, stock dividend or
similar transaction occurring after the date hereof (such redemption price being
hereinafter referred to as the "Redemption Price").  Notwithstanding anything
contained in this Agreement to the contrary, the Rights shall not be exercisable
pursuant to Section 7(a) at any time when the Rights are redeemable hereunder.

          Section 24.  Exchange.  (a) The Board of Directors of the Company may,
                       --------                                                 
at its option, at any time after any Person becomes an Acquiring Person,
exchange all or part of the then outstanding and exercisable Rights (which shall
not include Rights that have become void pursuant to the provisions of Section
11(a)(ii) hereof) for Common Shares at an exchange ratio of one Common Share per
Right, appropriately adjusted to reflect any stock split, stock dividend, or
similar transaction occurring after the date hereof (such exchange ratio being
hereinafter referred to as the "Exchange Ratio").  Notwithstanding the
foregoing, the Board of Directors shall not be empowered to effect such exchange
at any time after any person (other than the Company, any Subsidiary of the
Company, any employee benefit plan of the Company or any such Subsidiary, or any
entity holding Common Shares for or pursuant to the terms of any such plan),
together with all Affiliates and Associates of such Person, becomes the
Beneficial Owner of 50% or more of the Common Shares then outstanding.

                                       21
<PAGE>
 
          (b) Immediately upon the effective date of 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 Common
Shares equal to the number of such Rights held by such holder multiplied by the
Exchange Ratio.  The Company shall promptly give public notice of any such
exchange; provided, however, that the failure to give, or any defect in, such
          --------  -------                                                  
notice shall not affect the validity of such exchange.  The Company promptly
shall mail a notice of any such exchange to all of the holders of such Rights at
their last addresses as they appear upon the registry books of the Rights Agent
on the effective date of said action of the Board of Directors ordering the
exchange of Rights.  Any notice which is mailed in the manner herein provided
shall be deemed given, whether or not the holder receives the notice.  Each such
notice of exchange will state the method by which the exchange of the Rights for
Common Shares will be effected and, in the event of any partial exchange, the
number of Rights which will be exchanged.  Any partial exchange shall be
effected pro rata based on the number of Rights (other than Rights which have
become void pursuant to the provisions of Section 11(a)(ii) hereof) held by each
holder of Rights.

          (c) In the event that there shall not be sufficient Common Shares
issued but not outstanding or authorized but unissued to permit any exchange of
Rights as contemplated in accordance with subsection (a) of this Section 24, the
Company may substitute, for each Common Share that would otherwise be issuable
upon exchange of a Right, a number of shares of Preferred Stock or fraction
thereof such that the current per share market price of one Unit of Preferred
Stock multiplied by such number or fraction is equal to the current per share
market price of one Common Share as of the date of issuance of such Preferred
Stock or fraction thereof.

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

          Section 25.  Notice of Certain Events.  (a)  In case the Company shall
                       ------------------------                                 
propose (i) to pay any dividend payable in stock of any class to the holders of
its Preferred Stock (other than a regular quarterly cash dividend) or (ii) to
offer to the holders of its Preferred Stock rights or warrants to subscribe for
or to purchase any additional shares of Preferred Stock or shares of stock of
any class or any other securities, rights or options, or (iii) to effect any
reclassification of its Preferred Stock (other than a reclassification involving
only the subdivision of outstanding Preferred Stock), or (iv) to effect any
consolidation or merger into or with, or to effect any sale or other transfer
(or to permit one or more of its Subsidiaries to effect any sale or other
transfer), in one or more transactions, of 50% or more of the assets or earning
power of the Company and its 

                                       22
<PAGE>
 
Subsidiaries (taken as a whole) to, any other Person, or (v) to effect the
liquidation, dissolution or winding up of the Company, or (vi) to declare or pay
any dividend on the Common Shares payable in Common Shares or to effect a
subdivision, combination or consolidation of the Common Shares (by
reclassification or otherwise than by payment of dividends in Common Shares),
then, in each such case, the Company shall give to each holder of a Right
Certificate, in accordance with Section 26 hereof, a notice of such proposed
action, which shall specify the record date for the purposes of such stock
dividend, or distribution of rights or warrants, or the date on which such
reclassification, consolidation, merger, sale, transfer, liquidation,
dissolution, or winding up is to take place and the date of participation
therein by the holders of the Preferred Stock or the Common Shares, if any such
date is to be fixed, and such notice shall be so given in the case of any action
covered by clause (i) or (ii) above at least 20 days prior to the record date
for determining holders of the Preferred Stock or the Common Shares for purposes
of such action, and in the case of any such other action, at least 20 days prior
to the date of the taking of such proposed action or the date of participation
therein by the holders of the Common Shares, whichever shall be the earlier.

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

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

                         Greater Bay Bancorp
                         2860 West Bayshore Road
                         Palo Alto, California 94303

                         Attention:  Executive Vice President,
                                     Chief Operating Officer and
                                     Chief Financial Officer

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

                                       23
<PAGE>
 
                         Norwest Bank Minnesota, N. A.
                         161 North Concord Exchange
                         South St. Paul, Minnesota 55075
 
                         Attention:  Account Manager
                                     Greater Bay Bancorp

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

          Section 27.  Supplements and Amendments.  Prior to the Distribution
                       --------------------------                            
Date, the Company may supplement or amend this Agreement without the approval of
any holders of Rights by action of its Board of Directors, and the Rights Agent
shall, if the Company so directs, execute such supplement or amendment.  From
and after the Distribution Date, the Company may supplement or amend this
Agreement without the approval of any holder of Rights, by action of its Board
of Directors, 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 to (iv) make any other provisions in regard to matters or questions arising
hereunder which the Company and the Rights Agent may deem necessary or desirable
and which shall be consistent with, and for the purpose of fulfilling, the
objectives of the Board of Directors in adopting this Agreement; provided,
                                                                 -------- 
however, that from and after such time as any Person becomes an Acquiring Person
- -------                                                                         
or an Adverse Person, this Agreement shall not be amended in any manner which
would adversely affect the interests of the holders of Rights.  Upon receipt of
a certificate from an appropriate officer of the Company that the proposed
supplement or amendment is consistent with this Section 27 and, after such time
as any Person has become an Acquiring Person or an Adverse Person, that the
proposed supplement or amendment does not adversely affect the interests of the
holders of Rights, the Rights Agent shall execute such supplement or amendment.

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

          Section 30.  Determinations and Actions by the Board of Directors.
                       ----------------------------------------------------  
For all purposes of this Agreement, any calculation of the number of Common
Shares outstanding at any particular time, including for purposes of determining
the particular percentage of such outstanding shares of which any Person is the
Beneficial Owner, shall be made in accordance 

                                       24
<PAGE>
 
with the last sentence of Rule 13d-3(d)(1)(i) of the Exchange Act. 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 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 Certificate and all
other parties and (y) not subject the Board of Directors to any liability to the
holders of the Rights.

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

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

          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.

                                       25
<PAGE>
 
          IN WITNESS WHEREOF, the parties hereto have caused this Agreement to
be duly executed and their respective corporate seals to be hereunto affixed and
attested, all as of the day and year first above written.

                                         GREATER BAY BANCORP
 
Attest:
 
By:        /s/ Linda M. Iannone         By:     /s/ David L. Kalkbrenner
           --------------------                 ------------------------
Name:      Linda M. Iannone             Name:   David L. Kalkbrenner
           --------------------                 ------------------------
Title:     Secretary                    Title:  President and CEO
           --------------------                 ------------------------
 
Attest:                                 NORWEST BANK MINNESOTA, N. A.
 
 
By:        /s/ Kelly A. Beenan          By:     /s/ William J. Kennedy
           -------------------                  ------------------------
Name:      Kelly A. Beenan              Name:   William J. Kennedy
           -------------------                  ------------------------
Title:     Vice President               Title:  Vice President
           -------------------                  ------------------------

                                       26
<PAGE>
 
                                                                       Exhibit A
                                                                       ---------

                          CERTIFICATE OF DETERMINATION

                                       of

                            SERIES A PREFERRED STOCK

                                       of

                              GREATER BAY BANCORP

                        (Pursuant to Section 401 of the
                      California General Corporation Law)


          David L. Kalkbrenner and Carleen Maniglia hereby certify that:

          A.   They are the President and Assistant Secretary, respectively, of
Greater Bay Bancorp, a California corporation (the "Corporation").

          B.   The Corporation's Articles of Incorporation authorize the
issuance of up to 4,000,000 shares of Preferred Stock.

          C.   Pursuant to the authority conferred upon the Board of Directors
by the Articles of Incorporation of the Corporation, and pursuant to the
provisions of Section 401 of the General Corporation Law of the State of
California (the "GCL"), the Board of Directors, at a meeting duly held on
November 17, 1998, adopted resolutions providing for the designation and
issuance of a series of 1,200,000 shares of Series A Preferred Stock, without
par value (the "Series A Preferred Stock").

          D.   The Certificate of Determination creating the rights,
preferences, privileges and restrictions of the Series A Preferred Stock reads
as follows:

          Section 1.  Designation and Amount.  The shares of such series shall
                      -----------------------                                 
be designated as "Series A Preferred Stock" (the "Series A Preferred Stock") and
the number of shares constituting the Series A Preferred Stock shall be
1,200,000 shares. Such number of shares may be increased or decreased by
resolution of the Board of Directors; provided, that no decrease shall reduce
the number of shares of Series A Preferred Stock to a number less than the
number of shares then outstanding plus the number of shares reserved for
issuance upon the exercise of outstanding options, rights or warrants or upon
the conversion of any outstanding securities issued by the Corporation
convertible into Series A Preferred Stock.

          Section 2.  Dividends and Distributions.  (A)  Subject to the rights
                      ---------------------------                             
of the holders of any shares of any series of Preferred Stock (or any similar
stock) ranking prior and superior to 

                                       1
<PAGE>
 
the Series A Preferred Stock with respect to dividends, the holders of shares of
Series A Preferred Stock, in preference to the holders of Common Stock, no par
value (the "Common Stock"), of the Corporation, and of any other junior stock,
shall be entitled to receive, when, as and if declared by the Board of Directors
out of funds legally available for the purpose, quarterly dividends payable in
cash on the last 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) $.095 or (b)
subject to the provision for adjustment hereinafter set forth, the aggregate per
share amount of all cash dividends, and 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. In the event the
Corporation shall at any time declare or pay any dividend on the Common Stock
payable in shares of Common Stock, or effect a subdivision or combination or
consolidation of the outstanding shares of Common Stock (by reclassification or
otherwise than by payment of a dividend in shares of Common Stock) into a
greater or lesser number of shares of Common Stock, then in each such case the
amount to which holders of shares of Series A Preferred Stock were entitled
immediately prior to such event under clause (b) of the preceding sentence shall
be adjusted by multiplying such amount by a fraction, the numerator of which is
the number of shares of Common Stock outstanding immediately after such event
and the denominator of which is the number of shares of Common Stock that were
outstanding immediately prior to such event.

          (B)  The Corporation shall declare a dividend or distribution on the
Series A Preferred Stock as provided in paragraph (A) of this Section
immediately after it declares a dividend or distribution on the Common Stock
(other than a dividend payable in shares of Common Stock); provided that, in the
event no dividend or 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 $.095 per share on the
Series A Preferred Stock shall nevertheless be payable on such subsequent
Quarterly Dividend Payment Date.

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

                                       2
<PAGE>
 
pro rata on a share-by-share basis among all such shares at the time
outstanding. The Board of Directors may fix a record date for the determination
of holders of shares of Series A Preferred Stock entitled to receive payment of
a dividend or distribution declared thereon, which record date shall be not less
than 10 nor more than 60 days prior to the date fixed for the payment thereof.

          Section 3.  Voting Rights.  The holders of shares of Series A 
                      -------------
Preferred Stock shall have the following voting rights:

          (A)  Each share of Series A Preferred Stock shall entitle the holder
thereof to one vote on all matters submitted to a vote of the shareholders of
the Corporation.

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

          Section 4. Certain Restrictions.  (A)  Whenever quarterly dividends or
                     ---------------------                                      
other 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, or make any other distributions,
          on any shares of stock ranking junior (either as to dividends or upon
          liquidation, dissolution or winding up) to the Series A Preferred
          Stock;

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

              (iv)   redeem or purchase or otherwise acquire for consideration
          any shares of Series A Preferred Stock, or any shares of stock ranking
          on a parity with the Series A Preferred Stock, except in accordance
          with a purchase offer made in 

                                       3
<PAGE>
 
          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 paragraph (A) of
this Section 4, purchase or otherwise acquire such shares at such time and in
such manner.

          Section 5.  Reacquired Shares.  Any shares of Series A Preferred Stock
                      -----------------                                         
purchased or otherwise acquired by the Corporation in any manner whatsoever
shall be retired and cancelled promptly after the acquisition thereof.  All such
shares shall upon their cancellation become authorized but unissued shares of
Preferred Stock and may be reissued as part of a new series of Preferred Stock
subject to the conditions and restrictions on issuance set forth herein, in the
Articles of Incorporation, or in any other Certificate of Determination creating
a series of Preferred Stock or any similar stock or as otherwise required by
law.
 
   Section 6. Liquidation, Dissolution or Winding Up.  Upon any liquidation,
              --------------------------------------                        
dissolution or winding up of the Corporation, no distribution shall be made (1)
to the holders of shares of stock ranking junior (either as to dividends or upon
liquidation, dissolution or winding up) to the Series A Preferred Stock unless,
prior thereto, the holders of shares of Series A Preferred Stock shall have
received an amount per share equal to $100.00, plus an amount equal to accrued
and unpaid dividends and distributions thereon, whether or not declared, to the
date of such payment, provided that the holders of shares of Series A Preferred
Stock shall be entitled to receive an aggregate amount per share, subject to the
provision for adjustment hereinafter set forth, equal to the aggregate amount to
be distributed per share to holders of shares of Common Stock, or (2) to the
holders of shares of stock ranking on a parity (either as to dividends or upon
liquidation, dissolution or winding up) with the Series A Preferred Stock,
except distributions made ratably on the Series A Preferred Stock and all 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 declare or pay any dividend on the
Common Stock payable in shares of Common Stock, or effect a subdivision or
combination or consolidation of the outstanding shares of Common Stock (by
reclassification or otherwise than by payment of a dividend in shares of Common
Stock) into a greater or lesser number of shares of Common Stock, then in each
such case the aggregate amount to which holders of shares of Series A Preferred
Stock were entitled immediately prior to such event under the proviso in clause
(1) of the preceding sentence shall be adjusted by multiplying such amount by a
fraction the numerator of which is the number of shares of Common Stock
outstanding immediately after such event and the denominator of which is the
number of shares of Common Stock that were outstanding immediately prior to such
event.

          Section 7.  Consolidation, Merger, etc.  In case the 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, 
  
                                       4
<PAGE>
 
then in any such case each share of Series A Preferred Stock shall at the same
time be similarly exchanged or changed into an amount per share, subject to the
provision for adjustment hereinafter set forth, equal to the aggregate amount of
stock, securities, cash and/or any other property (payable in kind), as the case
may be, into which or for which each share of Common Stock is changed or
exchanged. In the event the Corporation shall at any time declare or pay any
dividend on the Common Stock payable in shares of Common Stock, or effect a
subdivision or combination or consolidation of the outstanding shares of Common
Stock (by reclassification or otherwise than by payment of a dividend in shares
of Common Stock) into a greater or lesser number of shares of Common Stock, then
in each such case the amount set forth in the preceding sentence with respect to
the exchange or change of shares of 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.  Rank.  The Series A Preferred Stock shall rank, with 
                      ----
respect to the payment of dividends and the distribution of assets, junior to 
all other series of the Corporation's Preferred Stock, unless the terms of any 
such series shall provide otherwise.

          Section 10. Amendment.  The Articles of Incorporation (including any 
                      ---------
Certificate of Determination issued under the authority of said Articles) of 
the Corporation 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 without the affirmative vote of the 
holders of at least two-thirds of the outstanding shares of Series A Preferred 
Stock, voting together as a single series.

    E. The foregoing Certificate of Determination has been duly approved by the 
Board of Directors of the Corporation.

    F. None of the shares of Series A Preferred Stock authorized by the 
foregoing Certificate of Determination has been issued.

                                       5

<PAGE>
 
          The undersigned declare under penalty of perjury under the laws of the
State of California that the matters set forth in this Certificate are true and
correct of their own knowledge.

Date:  November __, 1998


                         ________________________________________
                         David L. Kalkbrenner, President



                         ________________________________________ 
                         Carleen Maniglia, Assistant Secretary


                                       6
<PAGE>
 
                                                                       Exhibit B
                                                                       ---------



                           Form of Right Certificate


Certificate No. R-                                                  ____Rights

               NOT EXERCISABLE AFTER NOVEMBER 17, 2008 OR EARLIER
                 IF REDEMPTION OCCURS.  THE RIGHTS ARE SUBJECT
                 TO REDEMPTION AT $.001 PER RIGHT ON THE TERMS
                       SET FORTH IN THE RIGHTS AGREEMENT.


                               Right Certificate


                              GREATER BAY BANCORP



     This certifies that ________________, or registered assigns, is the
registered owner of the number of Rights set forth above, each of which entitles
the owner thereof, subject to the terms, provisions and conditions of the Rights
Agreement, dated as of November  17, 1998 (the "Rights Agreement"), between
GREATER BAY BANCORP, a California corporation (the "Company"), and NORWEST BANK
MINNESOTA, N.A. (the "Rights Agent"), to purchase from the Company at any time
after the Distribution Date (as such term is defined in the Rights Agreement)
and prior to 5:00 p.m., California time, on November 17, 2008, at the office of
the Rights Agent, or at the office of its successor as Rights Agent, one one-
hundredth of a fully paid non-assessable share of Preferred Stock, no par value
(the "Preferred Shares"), of the Company, at a purchase price of $145.00 per
Preferred Share (the "Purchase Price"), upon presentation and surrender of this
Right Certificate with the Form of Election to Purchase duly executed.  The
number of Rights evidenced by this Right Certificate (and the number of
Preferred Shares which may be purchased upon exercise hereof) set forth above,
and the Purchase Price set forth above, are the number and Purchase Price as of
November 17, 1998, based on the Preferred Shares as constituted at such date.
As provided in the Rights Agreement, the Purchase Price and the number of
Preferred Shares 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.  Copies of the
Rights Agreement are on file at the principal executive offices of the Company
and the below-mentioned offices of the Rights Agent.

                                       1
<PAGE>
 
     This Right Certificate, with or without other Right Certificates, upon
surrender at the principal offices of the Rights Agent may be exchanged for
another Right Certificate or Right Certificates of like tenor and date
evidencing Rights entitling the holder to purchase a like aggregate number of
Preferred Shares as the Rights evidenced by the Right Certificate or Right
Certificates surrendered shall have entitled such holder to purchase.  If this
Right Certificate shall be exercised in part, the holder shall be entitled to
receive upon surrender hereof another Right or Right Certificates for the number
of whole Rights not exercised.

     Subject to the provisions of the Rights Agreement, the Rights evidenced by
this Certificate may be redeemed by the Company at a redemption price of $.001
per Right.

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

     No holder of this Right Certificate shall be entitled to vote or receive
dividends or be deemed for any purpose the holder of the Preferred Shares or of
any other securities of the Company which may at any time be issuable on the
exercise hereof, nor shall anything contained in the Rights Agreement or herein
be construed to confer upon the holder hereof, as such, any of the rights of a
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 meetings or
other actions affecting shareholders (except as provided in the Rights
Agreement), or to receive dividends or subscription rights, or otherwise, until
the Right or Rights evidenced by this Right Certificate shall have been
exercised as provided in the Rights Agreement.

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

     WITNESS the facsimile signature of the proper officers of the Company and
its corporate seal.  Dated as of ____________, ____.


ATTEST:                                GREATER BAY BANCORP

By:  _______________________           By:  ________________________

Countersigned:

NORWEST BANK MINNESOTA, N.A.

By:  _______________________
     Authorized Signature

                                       2
<PAGE>
 
                   Form of Reverse Side of Right Certificate
                                        



                               FORM OF ASSIGNMENT
                               ------------------



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


     FOR VALUE RECEIVED

______________________________________________________________________________

hereby sells, assigns and transfers unto _____________________________________

______________________________________________________________________________
                 (Please print name and address of transferee)

_____________________________________________________________________________

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


Dated: _________________, 19__
 
 
                                        _________________________________
                                        Signature

Signature Guaranteed:


     Signatures must be guaranteed by a commercial bank or trust company,
broker, dealer or other eligible institution which is a member in good standing
of a medallion guaranty program approved by the Securities Transfer Association,
Inc.

                                       3
<PAGE>
 

            Form of Reverse Side of Right Certificate -- Continued

                         FORM OF ELECTION TO PURCHASE
                         ----------------------------
      To be executed if holder desires to exercise the Right Certificate.
 
To:  GREATER BAY BANCORP

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

Please insert social security
or other identifying number

______________________________________________________________________________
                        (Please print name and address)
____________________________________________________________________________

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

Please insert social security
or other identifying number
______________________________________________________________________________
                        (Please print name and address)

Dated: _____________, 19___              _______________________________
                                         Signature
Signature Guaranteed:

          Signature must be guaranteed by a member firm of a registered national
securities exchange, a member of the National Association of Securities Dealers,
Inc., or a commercial bank or trust company having an office or correspondent in
the United States.

                                     NOTICE

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

                                       4
<PAGE>
 
                                                                       Exhibit C
                                                                       ---------

                         SUMMARY OF RIGHTS TO PURCHASE
                                PREFERRED SHARES


          On November 17, 1998, the Board of Directors of GREATER BAY BANCORP
(the "Company") declared a dividend of one preferred share purchase right (a
"Right") for each outstanding share of common stock, no par value (the "Common
Shares"), of the Company.  The dividend is payable on November 30, 1998 (the
"Record Date") to the shareholders of record on that date.  Each Right entitles
the registered holder to purchase from the Company one one-hundredth of a share
(a "Unit") of Series A Preferred Stock, no par value  (the Preferred "Stock") of
the Company, at a price of $145.00 per Unit Share (the "Purchase Price"),
subject to adjustment.  The description and terms of the Rights are set forth in
a Rights Agreement (the "Rights Agreement") between the Company and NORWEST BANK
MINNESOTA, N.A., as Rights Agent (the "Rights Agent").

          Until the earliest to occur of (a) 10 days following a public
announcement that a person or group of affiliated or associated persons (an
"Acquiring Person") has acquired, or obtained the right to acquire, beneficial
ownership or record ownership of 10% or more of the outstanding Common Shares;
(b) 10 days following the commencement of, or announcement of an intention to
make, a tender offer or exchange offer the consummation of which would result in
the beneficial ownership or record ownership by a person or group of 10% or more
of such outstanding Common Shares; or (c) the date a person or group of
affiliated or associated persons is or becomes the beneficial or record owner of
10% or more of the outstanding Common Shares and (i) the actions such person
proposes to take are likely to have a material adverse impact on the business or
prospects of the Company; (ii) such person intends to cause the Company to
repurchase the Common Shares owned by such person; (iii) such person exercises
or attempts to exercise a controlling influence over the Company; or (iv) such
person transfers all or a portion of such Common Shares in a manner that results
in a person owning 9.9% or more of the Common Shares (an "Adverse Person") (the
earliest of such dates being called the "Distribution Date"), the Rights will be
evidenced, with respect to any of the Common Share certificates outstanding as
of the Record Date, by such Common Share certificate with a copy of this Summary
of Rights attached thereto.

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

                                       1
<PAGE>
 
certificates evidencing the Rights ("Right Certificates") will be mailed to
holders of record of the Common Shares as of the close of business on the
Distribution Date and such separate Right Certificates alone will evidence the
Rights.

          Because of the nature of the dividend, liquidation and voting rights,
the value of each Unit of Preferred Stock purchasable upon exercise of the
Rights should approximate the value of one Common Share.

          The Rights are not exercisable until the Distribution Date.  The
Rights will expire on November 17, 2008 (the "Final Expiration Date"), unless
the Final Expiration Date is extended or unless the Rights are earlier redeemed
by the Company, in each case, as described below.

          The Purchase 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) upon the grant to holders of the Units of Preferred Stock
of certain rights or warrants to subscribe for or purchase Preferred Stock at a
price, or securities convertible into Preferred Stock with a conversion price,
less than the then current market price of the Preferred Stock or (iii) upon the
distribution to holders of the Units of Preferred Stock of evidences of
indebtedness or assets (excluding regular periodic cash dividends paid out of
earnings or retained earnings or dividends payable in Preferred Stock) or of
subscription rights or warrants (other than those referred to above).

          In the event that the Company is acquired in a merger or other
business combination transaction or 50% or more of its consolidated assets or
earning power are sold, each holder of a Right will thereafter have the right to
receive, upon the exercise thereof at the then current exercise price of the
Right, that number of shares of common stock of the acquiring company which at
the time of such transaction will have a market value of two times the exercise
price of the Right.  In the event that any Person becomes an Acquiring Person or
an Adverse Person, each holder of a Right, other than Rights beneficially owned
by the Acquiring Person or Adverse Person (which will thereafter be void), will
thereafter have the right to receive upon exercise that number of Units of
Preferred Stock having a market value of two times the exercise price of the
Right, but in no event will the purchase price per share be less than the par
value of the Preferred Stock.

          At any time after the date an Acquiring Person obtains 10% or more of
the Company's Common Shares and prior to the acquisition by the Acquiring Person
of 50% of the outstanding Common Shares, the Company's Board of Directors may
exchange the Rights (other than Rights owned by the Acquiring Person or its
affiliates), in whole or in part, for Common Shares at an exchange ratio of one
Common Share per Right (subject to adjustment).

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

                                       2
<PAGE>
 
fractional Units of Preferred Stock (other than fractions which are integral
multiples of one one-hundredth) will be issued and in lieu thereof, an
adjustment in cash will be made based on the market price of the Units of
Preferred Stock on the last trading day prior to the date of exercise.

          At any time prior to the date a Person becomes an Acquiring Person or
an Adverse Person, the Board of Directors of the Company may redeem the Rights
in whole, but not in part, at a price of $.001 per Right (the "Redemption
Price").  Immediately upon any redemption of the Rights, the right to exercise
the Rights will terminate and the only right of the holders of Rights will be to
receive the Redemption Price.

          The terms of the Rights may be amended by the Board of Directors of
the Company without the consent of the holders of the Rights, including an
amendment to extend the Final Expiration Date and, provided there is no
Acquiring Person or Adverse Person, to extend the period during which the Rights
may be redeemed, except that from and after such time as any person becomes an
Acquiring Person or an Adverse Person no such amendment may adversely affect the
interests of the holders of the Rights.

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

          The Rights have certain anti-takeover effects.  The Rights will cause
substantial dilution to a person or group that attempts to acquire the Company
on terms not approved by the Company's Board of Directors, except pursuant to an
offer conditioned on a substantial number of Rights being acquired.  The Rights
should not interfere with any merger or other business combination approved by
the Board of Directors because the Rights may be redeemed by the Company at the
Redemption Price prior to the occurrence of a Distribution Date.

          A copy of the Rights Agreement has been filed with the Securities and
Exchange Commission as an Exhibit to a Registration Statement on Form 8-A dated
November  __, 1998.  A copy of the Rights Agreement is available free of charge
from the Company.  This summary description of the Rights does not purport to be
complete and is qualified in its entirety by reference to the Rights Agreement,
which is hereby incorporated herein by reference.

                                       3


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