SJNB FINANCIAL CORP
424B3, 1999-11-01
STATE COMMERCIAL BANKS
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<PAGE>

                                                Filed pursuant to Rule 424(b)(3)
                                                      Registration No. 333-89013


                         [LOGO OF SJNB FINANCIAL CORP.]

                            One North Market Street
                           San Jose, California 95113

                                                                October 29, 1999
Dear Shareholder:

   You are cordially invited to attend a Special Meeting of the Shareholders of
SJNB Financial Corp. to be held at San Jose National Bank, One North Market
Street, San Jose, California, at 10:00 a.m., local time, on December 13, 1999.

   At the meeting, SJNB shareholders will be asked to consider and vote upon a
proposal to approve the principal terms of the Agreement and Plan of Merger
dated as of August 27, 1999, by and among SJNB, Saratoga Bancorp and Saratoga
National Bank, including the merger of Saratoga into SJNB, as more fully
described in the accompanying joint proxy statement/prospectus. The merger
agreement is attached to this document as Annex A. No other business will be
transacted at the meeting other than matters incidental to the conduct of the
meeting.

   As a result of the merger, each share of Saratoga common stock outstanding
at the effective time of the merger, other than shares with respect to which
dissenters' rights are perfected, will be converted into 0.70 of a share of
SJNB common stock, subject to certain potential adjustments described in the
merger agreement and the accompanying joint proxy statement/prospectus. No
fractional shares of SJNB common stock will be issued to holders of shares of
Saratoga common stock, and, in lieu of such fractional shares, cash will be
paid to Saratoga shareholders in accordance with the merger agreement.

   Under the California General Corporation Law, the approval of the merger
agreement and the merger requires the affirmative vote of the holders of a
majority of the outstanding shares of SJNB common stock. The consummation of
the proposed merger also requires that certain regulatory approvals be received
and that the conditions contained in the merger agreement be satisfied.

   THE SJNB BOARD OF DIRECTORS HAS UNANIMOUSLY APPROVED THE MERGER AGREEMENT
AND THE TRANSACTIONS CONTEMPLATED BY THE MERGER AGREEMENT, INCLUDING THE
MERGER, AND RECOMMENDS THAT THE SHAREHOLDERS VOTE FOR APPROVAL OF THE MERGER
AGREEMENT AND THE TRANSACTIONS CONTEMPLATED BY THE MERGER AGREEMENT, INCLUDING
THE MERGER, AT THE MEETING.

   The accompanying notice and joint proxy statement/prospectus describe the
matters to be acted upon at the meeting. Shareholders are urged to review
carefully the attached document, including its annexes. Such documents contain
a detailed description of the merger, its terms and conditions and the
transactions which are proposed.

   Your continuing interest in the business of SJNB is appreciated, and we hope
you will attend the meeting in person. It is important that your shares be
represented at the meeting. Accordingly, whether or not you plan to attend the
meeting, please sign, date and return the enclosed proxy promptly in the
postage-paid envelope that has been provided to you for your convenience.

                                      Sincerely,

                                                /s/ James R. Kenny
                                                  James R. Kenny
                                       President and Chief Executive Officer



    Neither the Securities and Exchange Commission nor any state
 securities regulators have approved this transaction or the shares of
 SJNB common stock to be issued under this proxy statement/prospectus or
 determined if this proxy statement/prospectus is accurate or adequate.
 Any representation to the contrary is a criminal offense.

    The shares of SJNB common stock offered by this proxy
 statement/prospectus are not savings accounts, deposits or other
 obligations of any bank or nonbank subsidiary of any of the parties and
 are not insured by the Federal Deposit Insurance Corporation or any other
 governmental agency.


         The date of this proxy statement/prospectus is October 29, 1999,
   and is first being mailed to SJNB shareholders on or about November 5, 1999.
<PAGE>



                         [LOGO OF SJNB FINANCIAL CORP.]

                   Notice of Special Meeting of Shareholders
                        to be held on December 13, 1999

   To the shareholders of SJNB Financial Corp.:

   Notice is hereby given that a special meeting of shareholders of SJNB
Financial Corp. will be held on December 13, 1999, 10:00 a.m., local time, at
San Jose National Bank, One North Market Street, San Jose, California, for the
following purposes:

  1. To consider and vote upon a proposal to approve the Agreement and Plan
     of Merger, dated as of August 27, 1999, among SJNB Financial Corp.,
     Saratoga Bancorp and Saratoga National Bank and the transactions
     contemplated by the merger agreement, including the resulting issuance
     of shares of SJNB common stock in connection with the merger of Saratoga
     Bancorp into SJNB Financial Corp. The terms and conditions of the
     transaction are more fully described in the accompanying joint proxy
     statement/prospectus.

  2. To transact such other business as may properly be brought before the
     special meeting or any adjournments or postponements of the special
     meeting.

   The Board of Directors of SJNB has unanimously approved the merger described
above and unanimously recommends that you vote for the merger at the special
meeting.

   Shareholders of record at the close of business on October 22, 1999, are
entitled to notice of the special meeting and to vote at the special meeting or
any adjournment or postponement of the special meeting.

                                          By Order Of The Board Of Directors,

                                                  /s/ Jennifer Dowling,
                                                    Jennifer Dowling,
                                              Assistant Corporate Secretary


    Whether or not you plan to attend the special meeting in person, please
 complete, date, sign and return the enclosed proxy card in the enclosed
 envelope. No postage is required if you mail the proxy card in the United
 States. If you attend the special meeting, you may vote in person if you
 wish, even if you have previously returned your proxy card.


<PAGE>


                                [SARATOGA LOGO]
                         12000 Saratoga-Sunnyvale Road
                               Saratoga, CA 95070
                                                                October 29, 1999

Dear Shareholder:

   You are cordially invited to attend a Special Meeting of the Shareholders of
Saratoga Bancorp to be held at Saratoga National Bank, 12000 Saratoga-Sunnyvale
Road, Saratoga, California, at 10:00 a.m., local time, on December 13, 1999.

   At the meeting, Saratoga shareholders will be asked to consider and vote
upon a proposal to approve the principal terms of the Agreement and Plan of
Merger dated as of August 27, 1999, by and among SJNB Financial Corp., Saratoga
and Saratoga National Bank, including the merger of Saratoga into SJNB, as more
fully described in the accompanying joint proxy statement/prospectus. The
merger agreement is attached to this document as Annex A. No other business
will be transacted at the meeting other than matters incidental to the conduct
of the meeting.

   As a result of the merger, each share of Saratoga common stock outstanding
at the effective time of the merger, other than shares with respect to which
dissenters' rights are perfected, will be converted into 0.70 of a share of
SJNB common stock, subject to certain potential adjustments described in the
merger agreement and the accompanying joint proxy statement/prospectus. No
fractional shares of SJNB common stock will be issued to holders of shares of
Saratoga common stock, and, in lieu of such fractional shares, cash will be
paid to Saratoga shareholders in accordance with the merger agreement.

   Under the California General Corporation Law, the approval of the merger
agreement and the merger requires the affirmative vote of the holders of a
majority of the outstanding shares of Saratoga common stock. The consummation
of the proposed merger also requires that certain regulatory approvals be
received and that the conditions contained in the merger agreement be
satisfied.

   THE SARATOGA BOARD OF DIRECTORS HAS UNANIMOUSLY APPROVED THE MERGER
AGREEMENT AND THE TRANSACTIONS CONTEMPLATED BY THE MERGER AGREEMENT, INCLUDING
THE MERGER, AND RECOMMENDS THAT THE SHAREHOLDERS VOTE FOR APPROVAL OF THE
MERGER AGREEMENT AND THE TRANSACTIONS CONTEMPLATED BY THE MERGER AGREEMENT,
INCLUDING THE MERGER, AT THE MEETING.

   The accompanying notice and joint proxy statement/prospectus describe the
matters to be acted upon at the meeting. Shareholders are urged to review
carefully the attached document, including its annexes. Such documents contain
a detailed description of the merger, its terms and conditions and the
transactions which are proposed.

   Your continuing interest in the business of Saratoga is appreciated, and we
hope you will attend the meeting in person. It is important that your shares be
represented at the meeting. Accordingly, whether or not you plan to attend the
meeting, please sign, date and return the enclosed proxy promptly in the
postage-paid envelope that has been provided to you for your convenience.

                                      Sincerely,

                                                /s/ Richard L. Mount
                                                  Richard L. Mount
                                       Chairman, President and Chief Executive
                                                       Officer


    Neither the Securities and Exchange Commission nor any state securities
 regulators have approved this transaction or the shares of SJNB common stock
 to be issued under this proxy statement/prospectus or determined if this
 proxy statement/prospectus is accurate or adequate. Any representation to the
 contrary is a criminal offense.

    The shares of SJNB common stock offered by this proxy statement/prospectus
 are not savings accounts, deposits or other obligations of any bank or
 nonbank subsidiary of any of the parties and are not insured by the Federal
 Deposit Insurance Corporation or any other governmental agency.


         The date of this proxy statement/prospectus is October 29, 1999,
    and is first being mailed to Saratoga shareholders on or about November 5,
                                     1999.
<PAGE>

                                [SARATOGO LOGO]

                   Notice of Special Meeting of Shareholders
                        to be held on December 13, 1999

   To the shareholders of Saratoga Bancorp:

   Notice is hereby given that a special meeting of shareholders of Saratoga
Bancorp will be held on December 13, 1999, 10:00 a.m., local time, at Saratoga
National Bank, 12000 Saratoga-Sunnyvale Road, Saratoga, California, for the
following purposes:

  1. To consider and vote upon a proposal to approve the Agreement and Plan
     of Merger, dated as of August 27, 1999, among SJNB Financial Corp.,
     Saratoga Bancorp and Saratoga National Bank and the transactions
     contemplated by the merger agreement, including the merger of Saratoga
     Bancorp into SJNB Financial Corp. The terms and conditions of the
     transaction are more fully described in the accompanying joint proxy
     statement/prospectus.

  2. To transact such other business as may properly be brought before the
     special meeting or any adjournments or postponements of the special
     meeting.

   The Board of Directors of Saratoga has unanimously approved the merger
described above and unanimously recommends that you vote for the merger at the
special meeting.

   Shareholders of record at the close of business on October 22, 1999, are
entitled to notice of the special meeting and to vote at the special meeting or
any adjournment or postponement of the special meeting.

                                          By Order Of The Board Of Directors,

                                           /s/ V. Ronald Mancuso
                                              V. Ronald Mancuso
                                             Corporate Secretary


    Whether or not you plan to attend the special meeting in person, please
 complete, date, sign and return the enclosed proxy card in the enclosed
 envelope. No postage is required if you mail the proxy card in the United
 States. If you attend the special meeting, you may vote in person if you
 wish, even if you have previously returned your proxy card.


<PAGE>

                               TABLE OF CONTENTS
<TABLE>
<CAPTION>
                                                                           Page
                                                                           ----
<S>                                                                        <C>
QUESTIONS AND ANSWERS ABOUT THE MERGER ...................................   1
SUMMARY ..................................................................   3
  The Special Meetings ...................................................   3
  Information Regarding SJNB and Saratoga ................................   3
  Reasons for the Merger; Recommendations of the Boards of Directors .....   4
  Recommendations to Shareholders ........................................   4
  Opinion of Saratoga's Financial Advisor ................................   4
  Opinion of SJNB's Financial Advisor ....................................   4
  What Saratoga Shareholders will Receive ................................   5
  Conditions to the Merger ...............................................   5
  Termination of the Merger Agreement ....................................   5
  Termination Fees .......................................................   5
  Fees and Expenses of the Merger ........................................   6
  Stock Option Agreement .................................................   6
  Income Tax Consequences of the Merger ..................................   7
  Accounting Treatment ...................................................   7
  Interests of Saratoga Officers and Directors in the Merger .............   7
  Dissenters' Rights of Appraisal ........................................   7
  Comparative Per Share Market Price Information .........................   7
  Comparison of Shareholder Rights .......................................   8
  Selected Historical and Pro Forma Financial Data .......................   8
RISK FACTORS .............................................................  13
  Additional Shares of SJNB Common Stock Could be Issued Which Could
   Result in a Decline in the Market Price of Such Stock .................  13
  The Financial Condition of SJNB and Saratoga May be Negatively Impacted
   by Worsening Economic Conditions, Rising Interest Rates or Acts of
   Nature ................................................................  13
  Customers of Saratoga National Bank May Not Be Retained and SJNB May Not
   Be Able to Realize Anticipated Operating Cost Savings .................  13
  The Price of SJNB Common Stock May Decline .............................  14
  The Year 2000 Problem May Adversely Affect SJNB, Saratoga or the
   Combined Company ......................................................  14
INFORMATION REGARDING FORWARD-LOOKING STATEMENTS .........................  15
INTRODUCTION .............................................................  16
  The Special Meetings: Dates, Times and Places ..........................  16
  Matters to be Considered at the Special Meetings .......................  16
  Record Date; Stock Entitled to Vote; Quorum ............................  16
  Votes Required .........................................................  16
  Share Ownership of Management ..........................................  17
  Voting of Proxies ......................................................  19
INFORMATION ABOUT SJNB AND SAN JOSE NATIONAL BANK ........................  21
INFORMATION ABOUT SARATOGA AND SARATOGA NATIONAL BANK.....................  22
THE MERGER ...............................................................  23
  Background of the Merger ...............................................  23
  Reasons for the Merger; Recommendations of the Boards of Directors .....  24
  Opinion of Saratoga's Financial Advisor ................................  26
  Opinion of SJNB's Financial Advisor ....................................  30
  Effective Date and Time of the Merger ..................................  36
  Purchase Price and Potential Adjustments ...............................  37
  Conversion of Shares of Saratoga Common Stock ..........................  37
  Exchange of Saratoga Stock Certificates; Fractional Interests ..........  37
  Treatment of Stock Options .............................................  38
</TABLE>

                                       i
<PAGE>

<TABLE>
<CAPTION>
                                                                          Page
                                                                          ----
<S>                                                                       <C>
  Interests of Saratoga Officers and Directors in the Merger ............  38
  Conduct of Business Pending the Merger ................................  39
  Additional Agreements .................................................  41
  Representations and Warranties ........................................  43
  Conditions to the Completion of the Merger ............................  44
  Termination of the Merger Agreement ...................................  45
  Fees and Expenses .....................................................  47
  Amendment .............................................................  48
  Extension; Waiver .....................................................  48
  Management and Operations Following the Merger ........................  48
  Required Regulatory Approvals .........................................  48
  Stock Option Agreement ................................................  50
  Certain Federal Income Tax Consequences ...............................  54
  Accounting Treatment ..................................................  55
  Trading Markets for Stock .............................................  56
  Resales of SJNB Common Stock ..........................................  56
DISSENTERS' RIGHTS OF APPRAISAL .........................................  57
  Appraisal Rights of SJNB Shareholders .................................  57
  Appraisal Rights of Saratoga Shareholders .............................  58
UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL INFORMATION.............  60
MARKET PRICE AND DIVIDEND INFORMATION ...................................  68
  Market Quotations .....................................................  68
  Dividends and Dividend Policy .........................................  68
COMPARISON OF SHAREHOLDER RIGHTS ........................................  70
  General ...............................................................  70
  Certain Anti-Takeover Measures ........................................  70
  Quorum Requirements ...................................................  70
  Indemnification of Directors and Executive Officers ...................  70
  Shareholder Meetings and Action by Written Consent ....................  74
  Cumulative Voting .....................................................  74
  Amendment of Bylaws ...................................................  74
  Filling Vacancies on the Board of Directors ...........................  75
  Call of Annual or Special Meeting of Shareholders and Action by
   Shareholders Without a Meeting........................................  75
  Classified Board Provisions ...........................................  75
DESCRIPTION OF SJNB CAPITAL STOCK .......................................  76
  Common Stock ..........................................................  76
  Preferred Stock .......................................................  76
DESCRIPTION OF SARATOGA CAPITAL STOCK ...................................  77
  Common Stock ..........................................................  77
  Preferred Stock .......................................................  77
EXPERTS .................................................................  78
LEGAL MATTERS ...........................................................  78
SOLICITATION OF PROXIES .................................................  78
WHERE YOU CAN FIND MORE INFORMATION......................................  78
</TABLE>

<TABLE>
 <C>     <S>
 Annex A Agreement and Plan of Merger
 Annex B Stock Option Agreement
 Annex C Fairness Opinion of First Security Van Kasper
 Annex D Fairness Opinion of Sandler O'Neill & Partners, L.P.
 Annex E California General Corporation Law
         Chapter 13--Dissenters' Rights
</TABLE>

                                       ii
<PAGE>

                             QUESTIONS AND ANSWERS
                                ABOUT THE MERGER

   Q: Why is this merger proposed?

   A: Saratoga and SJNB are proposing this merger because the boards of
directors have concluded that this merger is in the best interests of
shareholders of Saratoga and SJNB and that the combined companies can offer
customers of Saratoga and SJNB a broader array of services and products than
each could offer on its own.

   Q: What will I receive in this merger?

   A: Under the merger agreement, Saratoga shareholders will have the right to
receive 0.70 of a share of SJNB common stock for each share of Saratoga common
stock that they own. SJNB shareholders will continue to own their existing
shares.

   Q: What will happen to Saratoga National Bank in this merger?

   A: Following the merger, Saratoga National Bank will merge into San Jose
National Bank. The resulting bank will continue under the name "San Jose
National Bank" as a subsidiary of SJNB.

   Q: Will the merger be tax free to me?

   A: The merger is intended to be a tax-free reorganization for federal income
tax purposes for the companies and their shareholders. In general, Saratoga
shareholders will not recognize gain or loss on the exchange of their stock,
other than on account of cash received for a fractional share or dissenting
shares. SJNB shareholders will not recognize any gain or loss in connection
with the merger. To review the tax consequences to SJNB and Saratoga
shareholders in greater detail, see "The Merger--Certain Federal Income Tax
Consequences," on page 54.

   Q: How do I vote?

   A: Simply indicate on your proxy card how you want to vote and then sign and
mail your proxy card in the enclosed return envelope as soon as possible so
that your shares may be represented at your special meeting.

   Q: If my shares are held in "street name" by my broker, will my broker vote
my shares for me?

   A: Your broker will not vote your shares for you unless you provide
instructions to your broker on how to vote. It is important that you follow the
directions provided by your broker regarding how to instruct your broker to
vote your shares. Your failure to instruct your broker on how to vote your
shares will have the same effect as a vote against the merger. Broker non-votes
will not have the effect of establishing dissenters' rights of SJNB
shareholders. See "Introduction--Voting of Proxies--Abstentions and Broker Non-
Votes" on page 19.

   Q: Can I change my vote after I have mailed my signed proxy card?

   A: Yes. You may change your vote at any time before your proxy is voted at
the special meeting. If your shares are held in your name, you may do this in
one of three ways. First, you may send a written notice stating that you would
like to revoke your proxy. Second, you may complete and submit a new proxy
card. If you choose either of these two methods, you must submit your notice of
revocation or your new proxy card to the address at the top of the notice of
the special meeting for Saratoga or SJNB and it must be received prior to the
special meeting. Third, you may attend the meeting and vote in person if you
tell the Secretary that you want to cancel your proxy and vote in person.
Simply attending the special meeting, however, will not revoke your proxy. If
you have instructed a broker to vote your shares, you must follow directions
received from your broker to change your vote or to vote in person at the
special meeting.

   Q: Should I send in my Saratoga stock certificates now?

   A: No. After the merger is completed, SJNB will send you written
instructions for exchanging your Saratoga stock certificates.

   Q: When do you expect this merger to be completed?

   A: We are working toward completing this merger as quickly as possible. We
currently expect to complete this merger in December 1999 or January 2000.

                                       1
<PAGE>

   Q: Why have you sent me this document?

   A: This proxy statement/prospectus contains important information regarding
the proposed merger, as well as information about SJNB and Saratoga. It also
contains important information about what the Saratoga and SJNB boards of
directors and management considered in evaluating this proposed merger. We urge
you to read this document carefully, including its annexes. You may also want
to review the documents listed under "Where You Can Find More Information" on
page 78.

   Q: Whom should I contact with questions or to obtain additional copies of
this joint proxy statement/prospectus?

   A: You may contact either:

   SJNB Financial Corp.
   One North Market Street
   San Jose, California 95113
   Attention: James R. Kenny
   (408) 947-7562

   or

   Saratoga Bancorp
   12000 Saratoga-Sunnyvale Road
   Saratoga, California 95070
   Attention: Richard L. Mount
   (408) 973-1111

    This joint proxy statement/prospectus incorporates by reference
 important business and financial information about SJNB and Saratoga that
 is not included in or delivered with this document. The information
 incorporated by reference is available without charge to shareholders upon
 written or oral request to the persons identified above.

    In order to ensure timely delivery of the information incorporated by
 reference, shareholder requests should be received by December 6, 1999.


                                       2
<PAGE>

                                    SUMMARY

   This summary highlights certain information in this proxy
statement/prospectus and may not contain all of the information that is
important to you. To understand the proposed merger fully and for a more
complete description of the terms of the proposed merger, you should carefully
read this entire document and the other documents to which we have referred
you. See "Where You Can Find More Information" (page 78). The merger agreement
is attached as Annex A to this document. We encourage you to read the merger
agreement. It is the legal document that governs the proposed merger.

The Special Meetings (page 16)

   SJNB Shareholders. You can vote at the meeting of SJNB shareholders if you
owned SJNB common stock at the close of business on October 22, 1999. You can
cast one vote for each share of SJNB common stock that you owned at that time.
In order to approve the merger of Saratoga with SJNB and the issuance of SJNB
common stock to Saratoga's shareholders, the holders of a majority of the
shares of SJNB common stock cast at the meeting must vote in its favor. You can
vote your shares by attending the SJNB meeting and voting in person, or you can
mark the enclosed proxy card with your vote, sign it and mail it in the
enclosed return envelope. You can revoke your proxy as late as the date of the
special meeting by submitting a written revocation, sending in a new proxy or
by attending the meeting and voting in person.

   Saratoga Shareholders. You can vote at the meeting of Saratoga shareholders
if you owned Saratoga common stock at the close of business on October 22,
1999. You can cast one vote for each share of Saratoga common stock that you
owned at that time. In order to approve the merger of Saratoga with SJNB, the
holders of at least a majority of the outstanding shares of Saratoga common
stock must vote in its favor. You can vote your shares by attending the
Saratoga meeting and voting in person, or you can mark the enclosed proxy card
with your vote, sign it and mail it in the enclosed return envelope. You can
revoke your proxy as late as the date of the special meeting by submitting a
written revocation, sending in a new proxy or by attending the meeting and
voting in person.

Information Regarding SJNB and Saratoga (pages 21 and 22)

SJNB Financial Corp.
One North Market Street
San Jose, California 95113
(408) 947-7562

   SJNB is a bank holding company incorporated under the laws of the State of
California and registered under the Bank Holding Company Act of 1956, as
amended. SJNB's principal banking subsidiary, San Jose National Bank, is a
national banking association organized under the laws of the United States. San
Jose National Bank presently operates two banking offices in two Northern
California counties. San Jose National Bank accepts checking and savings
deposits, offers money market deposit accounts and certificates of deposit,
makes secured and unsecured commercial and other installment and term loans and
offers other customary banking services.

Saratoga Bancorp
12000 Saratoga-Sunnyvale Road
Saratoga, California 95070
(408) 973-1111

   Saratoga is a bank holding company registered under the Bank Holding Company
Act. Saratoga's principal asset is the common stock of Saratoga National Bank,
a national banking association organized under

                                       3
<PAGE>

the laws of the United States and the sole subsidiary of Saratoga. Saratoga
National Bank conducts a commercial and retail banking business, which includes
accepting demand, savings and time deposits and making commercial, real estate
and consumer loans, and provides a variety of banking services to businesses,
governmental units and individuals.

Reasons for the Merger; Recommendations of the Boards of Directors (page 24)

   Each of the boards of directors of SJNB and Saratoga believes the merger to
be in the best interests of their respective institutions, shareholders,
communities and banking customers. Each board expects that SJNB, as the
surviving company, will be stronger in terms of growth opportunities and
profitability than is either institution at present. SJNB will also have the
advantage of consolidation and centralization of certain management and
operations functions and certain economies of scale. Furthermore, it is
believed that SJNB, the surviving company, as a stronger independent financial
institution with a primary market area covering a greater geographic area, will
be better able to compete with major banks in the communities now served by
each company.

Recommendations to Shareholders (pages 24-26)

   SJNB Shareholders. The board of directors of SJNB believes that the merger
is fair to you and in your best interests and unanimously recommends that you
vote "FOR" the proposal to approve the merger and the issuance of shares of
SJNB common stock in connection with the merger.

   Saratoga Shareholders. The board of directors of Saratoga believes that the
merger is fair to you and in your best interests and unanimously recommends
that you vote "FOR" the proposal to approve the merger.

   In evaluating the recommendations of the boards of directors summarized
above, shareholders should carefully consider the matters described under "Risk
Factors" and "The Merger--Background of the Merger" and "The Merger--Reasons
for the Merger; Recommendations of the Boards of Directors."

Opinion of Saratoga's Financial Advisor (page 26)

   First Security Van Kasper has rendered an opinion, dated August 27, 1999 and
updated to October 29, 1999, to the Saratoga board of directors that the merger
is fair, from a financial point of view, to the shareholders of Saratoga, as of
the date of such opinion. The First Security Van Kasper fairness opinion, which
sets forth certain assumptions made, matters considered and limits of review
undertaken, by First Security Van Kasper, is attached to this joint proxy
statement/prospectus as Annex C. Saratoga shareholders are urged to read this
fairness opinion in its entirety. See "The Merger--Opinion of Saratoga's
Financial Advisor," which also contains a discussion of the fees to be paid to
First Security Van Kasper. Certain of the fees to be paid to First Security Van
Kasper are contingent upon consummation of the merger.

Opinion of SJNB's Financial Advisor (page 30)

   Sandler O'Neill & Partners, L.P. has delivered its opinion to the SJNB board
of directors that, as of October 22, 1999, the exchange ratio is fair to the
holders of shares of SJNB common stock from a financial point of view. Sandler
O'Neill's opinion is attached to this joint proxy statement/prospectus as
Annex D. We encourage you to read the opinion carefully and the description
under "The Merger--Opinion of SJNB's Financial Advisor" to understand the
matters considered, assumptions made and qualifications and limitations on the
review undertaken by Sandler O'Neill in rendering the opinion. SJNB has agreed
to pay Sandler O'Neill a fee of $50,000 for rendering its opinion.

                                       4
<PAGE>


What Saratoga Shareholders will Receive (page 37)

   When the merger is completed, it is expected that Saratoga shareholders will
receive 0.70 of a share of SJNB common stock for each share of Saratoga common
stock held. This exchange ratio may be adjusted under the circumstances
described in this proxy statement/prospectus. See "The Merger--Purchase Price
and Potential Adjustments." Cash will be paid instead of fractional shares of
SJNB common stock. For example, if you hold 105 shares of Saratoga common
stock, you will have the right to receive 73.5 shares of SJNB common stock in
the merger. Since cash will be paid instead of a fractional share, you would
only receive 73 shares of SJNB common stock and a check in an amount equal to
0.5 of a share multiplied by the average SJNB closing price calculated during
the 20 consecutive trading days ending on the day that is five business days
prior to the closing date.

Conditions to the Merger (page 44)

   We will not complete the merger unless a number of conditions are satisfied.
These include:

  . approval of the principal terms of the merger agreement by both SJNB and
    Saratoga shareholders;

  . receipt of all required regulatory approvals;

  . absence of any court order prohibiting the merger;

  . listing on the NASDAQ Stock Market's National Market of the shares of
    SJNB common stock which will be issued to Saratoga shareholders;

  . receipt of tax opinions to the effect that the merger will be treated as
    a tax-free reorganization under the Internal Revenue Code;

  . absence of any orders suspending the effectiveness of the registration
    statement filed by SJNB to register the shares to be issued to Saratoga
    shareholders;

  . receipt of an opinion of independent public accountants to SJNB that the
    merger will qualify for "pooling of interests" accounting treatment and
    of a "poolability letter" of independent public accountants to Saratoga;
    and

  . other customary conditions.

Termination of the Merger Agreement (page 45)

   We can mutually agree in writing to terminate the merger agreement at any
time before the merger is completed, even if the shareholders of Saratoga or
SJNB have approved the merger agreement. In addition, either Saratoga or SJNB
can terminate the merger agreement under the circumstances described in this
proxy statement/prospectus. See "The Merger--Termination of the Merger
Agreement."

Termination Fees (page 47)

   Saratoga is required to pay SJNB a $1.3 million fee, less actual expenses
paid, if any, by Saratoga to SJNB as described below, if (1) SJNB terminates
the merger for the following reasons and (2) an acquisition event occurs within
18 months after the termination where 20% or more of the shares of Saratoga
common stock or the consolidated assets of Saratoga and Saratoga National Bank
have been transferred or disposed of through tender offer, sale or merger:

  . Saratoga or Saratoga National Bank breaches, in any material respect, any
    representation, warranty or covenant in the merger agreement, which
    breach is not cured within 45 days or is not capable of being cured and
    for which SJNB is entitled to elect not to consummate the merger;

                                       5
<PAGE>


  . The Saratoga board fails to recommend adoption of the merger agreement,
    amends or modifies the recommendation in a materially adverse manner,
    withdraws its recommendation, or approves or recommends a takeover
    proposal whether or not the board is required by its fiduciary duty to
    accept such takeover proposal; or

  . Saratoga, or any of its subsidiaries, affiliates or agents, solicits,
    initiates, facilitates or enters into discussion or negotiation relating
    to, any takeover proposal.

   SJNB is required to pay Saratoga a $1.3 million fee if the merger is
terminated for the following reasons:

  . by Saratoga, if SJNB accepts any offer or enters into any agreement with
    any third party regarding a takeover proposal where Saratoga is not
    included and this condition is not cured within 10 business days; or

  . by SJNB, if SJNB accepts a takeover proposal from a third party which
    does not require that the third party honor the terms of the merger and
    failing to accept the proposal would constitute a breach of fiduciary
    duty.

Fees and Expenses of the Merger (page 47)

   Other than in the situations described in the following paragraphs and in
"--Termination Fees" above, whether or not the merger is completed in
accordance with the merger agreement, all costs and expenses incurred in
connection with the merger agreement and the transactions covered by the merger
agreement will be paid by the party incurring those expenses.

   If the merger agreement is terminated due to either party's willful breach
of a representation, warranty or covenant, the breaching party will bear all
costs and expenses incurred by the non-breaching party.

   If the merger agreement is terminated because Deloitte & Touche LLP fails to
deliver a "poolability letter" at or prior to the closing, or a material
adverse change or prospective change has occurred in the business, financial
condition, results of operations or prospects of Saratoga or Saratoga National
Bank and such change has not been cured within a specified time, Saratoga shall
pay promptly all costs and expenses incurred by SJNB not exceeding $500,000.

   If the merger agreement is terminated because KPMG LLP fails to deliver a
pooling letter at or prior to the closing or a material adverse change or
prospective change has occurred in the business, financial condition, results
of operations or prospects of SJNB or its subsidiaries and such change has not
been cured within a specified time, SJNB shall pay promptly all costs and
expenses, excluding fees and expenses of First Security Van Kasper, incurred by
Saratoga not exceeding $500,000.

Stock Option Agreement (page 50)

   When SJNB and Saratoga signed the merger agreement we also signed a stock
option agreement. Under the stock option agreement, Saratoga gave SJNB an
option to purchase up to 378,561 shares of Saratoga common stock at an exercise
price of $19.21 per share, representing approximately 19.9% of the outstanding
shares of Saratoga common stock including shares subject to the option.

   The number of shares subject to the option will be increased if Saratoga
issues additional shares of common stock in order that the number of shares
constituting the option will continue to equal 19.9% of the then issued and
outstanding shares of Saratoga common stock. If Saratoga issues or agrees to
issue any shares of common stock at a price less than $19.21 per share, the
option exercise price will be equal to such lesser price.


                                       6
<PAGE>

   SJNB may exercise the option only upon the occurrence of both an "Initial
Triggering Event" and a "Subsequent Triggering Event" prior to the termination
of the option.

   Saratoga agreed to grant the option to SJNB in order to induce SJNB to enter
into the merger agreement. The option could have the effect of discouraging
other companies from trying to acquire Saratoga.

   The stock option agreement is attached to this joint proxy
statement/prospectus as Annex B.

Income Tax Consequences of the Merger (page 54)

   We have structured the merger so that, in general, SJNB, Saratoga and the
shareholders of SJNB and Saratoga will not recognize gain or loss for federal
income tax purposes in the merger, except for taxes payable because of cash
received by Saratoga shareholders instead of fractional shares or dissenting
shares. It is a condition to the merger that, at the closing of the merger,
SJNB receive an opinion from its counsel and Saratoga receive an opinion from
its independent accountants to the effect, among other matters, that the merger
should qualify as a tax-free reorganization.

   Tax matters are very complicated. The tax consequences of the merger to you
will depend on the facts of your own situation. We urge you to consult your own
tax advisors as to the specific tax consequences of the merger, including the
applicable federal, state, local and foreign tax laws.

Accounting Treatment (page 55)

   SJNB expects to account for the merger as a "pooling of interests." Under
the pooling of interests accounting method, SJNB will carry forward on its
books the assets and liabilities of Saratoga at their historical recorded
values.

Interests of Saratoga Officers and Directors in the Merger (page 38)

   Some of Saratoga's directors and officers may have interests in the merger
that are different from, or in addition to, yours. As a result, these directors
and officers may be more likely to vote to approve the merger agreement than
shareholders of Saratoga generally. The members of our boards of directors knew
about these additional interests, and considered them, when they approved the
merger.

Dissenters' Rights of Appraisal (pages 57-59)

   SJNB. No holder of SJNB common stock will be entitled to dissenters' rights
unless the holders of at least 5% of the outstanding shares of SJNB common
stock have perfected their dissenters' rights in accordance with Chapter 13 of
the California General Corporation Law.

   Saratoga. No holder of Saratoga common stock will be entitled to dissenters'
rights unless the holder has perfected his or her dissenter's rights in
accordance with Chapter 13 of the California General Corporation Law.

Comparative Per Share Market Price Information (page 68)

   SJNB common stock is listed and traded on the Nasdaq National Market under
the symbol "SJNB." Saratoga common stock is quoted on the OTC Bulletin Board
under the symbol "SRTB." The following table describes historical per share
market values for SJNB common stock and Saratoga common stock based on the last
sales prices and the equivalent pro forma market values for Saratoga common
stock on:

  . August 27, 1999, the last trading day before public announcement of the
    merger, and

  . October 26, 1999, the most recent date before the mailing of this joint
    proxy statement/prospectus.

                                       7
<PAGE>


The equivalent pro forma market value of Saratoga common stock was determined
by multiplying the exchange ratio (0.70) by the SJNB stock price.

                            Historical Market Price

<TABLE>
<CAPTION>
                                                           Saratoga Equivalent
                                           SJNB  Saratoga Pro Forma Market Value
                                          ------ -------- ----------------------
   <S>                                    <C>    <C>      <C>
   August 27, 1999....................... $33.25  $19.00         $23.275
   October 26, 1999......................  30.50   20.50          21.350
</TABLE>

   Following the merger, no shares of Saratoga common stock will be outstanding
and SJNB common stock will continue to be traded on the Nasdaq National Market.

Comparison of Shareholder Rights (pages 70-75)

   Your rights as a shareholder of Saratoga are currently governed by
California law and the articles of incorporation and bylaws of Saratoga. If the
merger is completed, your rights as an SJNB shareholder will continue to be
governed by California law but will also be determined by SJNB's articles of
incorporation and bylaws, which differ in certain respects from Saratoga's
articles of incorporation and bylaws.

Selected Historical and Pro Forma Financial Data (page 60)

   We are providing the following information to aid you in your analysis of
the financial effects of the merger. The following tables show financial
results actually achieved by each of SJNB and Saratoga (the "historical"
figures). The tables also show results as if the companies had been combined
for the periods presented (the "pro forma combined" figures). Pro forma
combined figures are simply arithmetical combinations of SJNB's and Saratoga's
separate financial results; you should not assume that SJNB and Saratoga would
have achieved the pro forma combined results if they had actually been combined
during the periods presented. These pro forma presentations treat our companies
as if they had always been combined for accounting and financial reporting
purposes, a method known as pooling of interests accounting, which is how we
plan to account for the merger. When you read this information, you should also
read the information under the heading "Unaudited Pro Forma Condensed Combined
Financial Information" (page 60). For purposes of illustration, the pro forma
combined figures have been calculated using the exchange ratio of 0.70. The
actual exchange ratio could be greater if the price of SJNB drops below
$29.3590 and if SJNB elects to adjust the exchange ratio in accordance with the
merger agreement. The exchange ratio may also be adjusted under certain other
circumstances. These potential adjustments are described under the heading "The
Merger--Purchase Price and Potential Adjustments" (page 37).

   Annual historical figures are derived from consolidated financial statements
of SJNB and Saratoga. The annual historical information presented below should
be read together with the consolidated audited financial statements of SJNB,
incorporated in this document by reference, and of Saratoga, incorporated in
this document by reference. To find this information, see "Where You Can Find
More Information" (page 78). Historical figures as of and for the nine-month
periods ended September 30, 1999 and 1998 are derived from unaudited financial
statements included in the Quarterly Reports of SJNB and Saratoga.

                                       8
<PAGE>


                              SJNB Financial Corp.
                 Historical Consolidated Financial Information
                (dollars in thousands, except per share amounts)

<TABLE>
<CAPTION>
                          Nine Months Ended
                            September 30,       As of and for the Years Ended December 31,
                          ------------------  --------------------------------------------------
                            1999      1998      1998       1997       1996      1995      1994
                          --------  --------  ---------  ---------  --------  --------  --------
<S>                       <C>       <C>       <C>        <C>        <C>       <C>       <C>
STATEMENT OF OPERATIONS
 DATA:
Net interest income.....  $ 15,949  $ 15,104  $  20,254  $  18,489  $ 16,468  $ 14,295  $  9,749
Provision for possible
 loan or lease losses...      (250)     (150)      (300)      (705)     (190)   (1,045)     (600)
Other income............     1,062       777      1,059      1,013       846       966       744
Other expenses..........    (9,578)   (8,444)   (11,497)    (9,910)   (9,635)   (8,797)   (6,676)
                          --------  --------  ---------  ---------  --------  --------  --------
Income before income
 taxes..................     7,183     7,287      9,516      8,887     7,489     5,419     3,217
Income taxes............    (2,979)   (3,046)    (3,975)    (3,773)   (3,198)   (2,395)   (1,354)
                          --------  --------  ---------  ---------  --------  --------  --------
Net income..............  $  4,204  $  4,241  $   5,541  $   5,114  $  4,291  $  3,024  $  1,863
                          ========  ========  =========  =========  ========  ========  ========
PER SHARE DATA:
Net income per share--
 basic..................  $   1.77  $   1.70  $    2.23  $    2.04  $   1.73  $   1.27  $   1.05
Net income per share--
 diluted................      1.68      1.61       2.11       1.94      1.64      1.22      1.00
Cash dividends per
 share..................      0.42      0.42       0.56       0.45      0.33      0.21      0.16
Shareholders' equity per
 share..................     14.92     14.04      14.48      13.30     12.14     11.02      9.92
Tangible shareholders'
 equity per share.......     13.34     12.34      12.84      11.80     10.40      9.06      7.84
                          ========  ========  =========  =========  ========  ========  ========
BALANCE SHEET DATA:
Balance sheet totals--
 end of period:
 Assets.................  $407,511  $342,953  $ 349,934  $ 324,919  $309,403  $252,195  $205,949
 Loans and leases.......   310,641   246,653    261,380    228,972   198,627   170,800   149,407
 Deposits...............   337,218   302,163    302,442    270,345   244,639   196,692   180,287
 Shareholders' equity...    35,110    34,552     35,482     33,159    31,205    26,658    23,442
Average balance sheet
 amounts:
 Assets.................  $377,301  $335,128  $ 337,185  $ 314,460  $274,868  $222,913  $153,717
 Loans and leases.......   285,863   231,296    236,971    212,795   183,367   152,820   112,818
 Earning assets.........   353,195   311,749    313,605    286,585   251,156   202,996   140,445
 Deposits...............   328,893   290,648    292,502    265,340   217,716   183,282   133,897
 Shareholders' equity...    34,189    33,915     34,097     31,091    28,288    24,898    18,210
                          ========  ========  =========  =========  ========  ========  ========
SELECTED RATIOS:*
Return on average equi-
 ty.....................   16.44 %   16.72 %     16.25%     16.45%    15.17%    12.15%    10.23%
Return on average tangi-
 ble equity.............   20.05 %   20.41 %     19.91%     20.77%    20.49%    17.87%    12.54%
Return on average as-
 sets...................    1.49 %    1.69 %      1.64%      1.63%     1.56%     1.36%     1.21%
Efficiency ratio (non-
 interest expense as a
 percentage of total
 revenues)..............   56.30 %   53.17 %     53.94%     50.82%    55.65%    57.64%    63.62%
Efficiency ratio
 excluding the
 amortization of
 intangibles and
 goodwill...............   54.29 %   51.05 %     51.80%     48.39%    52.77%    53.92%    62.04%
Average equity to aver-
 age assets.............    9.06 %   10.12 %     10.11%      9.89%    10.29%    11.17%    11.85%
Leveraged capital ra-
 tio....................    7.90 %    8.80 %      9.10%      9.07%     9.28%     9.00%     9.33%
Nonperforming loans and
 leases to total loans
 and leases.............    0.40 %    0.18 %      0.09%      0.19%     0.27%     0.52%     3.67%
Nonperforming assets to
 total assets...........    0.30 %    0.13 %      0.07%      0.13%     0.18%     0.35%     2.66%
Net chargeoffs (recov-
 eries) to average loans
 and leases.............   (0.08)%   (0.03)%      0.01%      0.10%     0.04%     0.33%     1.11%
Allowance for loan or
 lease losses to total
 loans and leases.......    1.66 %    1.91 %      1.83%      1.96%     2.02%     2.25%     2.22%
Allowance for loan or
 lease losses to
 nonperforming loans and
 leases.................  417.00 %  907.72 %  1,983.00%  1,059.70%   733.40%   430.24%    60.45%
                          ========  ========  =========  =========  ========  ========  ========
</TABLE>
- --------
* Selected ratios for the interim periods ending September 30, 1998 and
  September 30, 1999 are annualized.

                                       9
<PAGE>

                                Saratoga Bancorp
                 Historical Consolidated Financial Information
                (dollars in thousands, except per share amounts)

<TABLE>
<CAPTION>
                           Nine Months Ended
                             September 30,       As of and for the Years Ended December 31,
                          --------------------  ------------------------------------------------
                            1999       1998       1998      1997      1996      1995      1994
                          --------  ----------  --------  --------  --------  --------  --------
<S>                       <C>       <C>         <C>       <C>       <C>       <C>       <C>
STATEMENT OF OPERATIONS
 DATA:
Net interest income.....  $  4,223  $    4,047  $  5,349  $  5,073  $  4,027  $  3,711  $  3,517
Credit (Provision) for
 possible loan or lease
 losses.................       (66)       (136)     (136)       --       150        --       636
Other income............       912         493       765       477       353       577       405
Other expenses..........    (2,811)     (2,272)   (2,965)   (2,978)   (2,870)   (2,868)   (3,523)
                          --------  ----------  --------  --------  --------  --------  --------
Income before income
 taxes..................     2,258       2,132     3,013     2,572     1,660     1,420     1,035
Income taxes............      (824)       (810)   (1,065)     (976)     (559)     (539)     (377)
                          --------  ----------  --------  --------  --------  --------  --------
Net income..............  $  1,434  $    1,322  $  1,948  $  1,596  $  1,101  $    881  $    658
                          ========  ==========  ========  ========  ========  ========  ========
PER SHARE DATA:
Net income per share--
 basic..................  $   0.90  $     0.80  $   1.19  $   1.01  $   0.71  $   0.57  $   0.43
Net income per share--
 diluted................      0.80        0.72      1.07      0.92      0.64      0.55      0.39
Cash dividends per
 share..................      0.20        0.17      0.17      0.13      0.12      0.07      0.00
Shareholders' equity per
 share..................      9.50        9.13      9.36      8.31      7.69      7.15      6.23
Tangible shareholders'
 equity per share.......      9.50        9.13      9.36      8.31      7.69      7.15      6.23
                          ========  ==========  ========  ========  ========  ========  ========
BALANCE SHEET DATA:
Balance sheet totals--
 end of period:
 Assets.................  $151,698  $  139,864  $144,802  $131,044  $121,784  $100,497  $ 87,536
 Loans and leases.......    66,745      66,999    74,563    63,765    52,661    37,535    33,541
 Deposits...............   112,385     100,418   103,415    91,046    89,444    74,949    73,872
 Shareholders' equity...    15,073      15,036    15,257    13,605    11,952    11,057     9,627
Average balance sheet
 amounts:
 Assets.................  $148,213  $  130,076  $132,132  $124,727  $104,661  $ 87,426  $ 79,491
 Loans and leases.......    72,764      63,999    64,939    54,537    41,313    34,057    32,572
 Earning assets.........   132,664     121,977   122,876   115,805    96,483    78,715    70,646
 Deposits...............   108,685      91,603    93,385    89,264    79,118    70,749    68,304
 Shareholders' equity...    15,185      14,147    14,414    12,570    11,331    10,230    10,072
                          ========  ==========  ========  ========  ========  ========  ========
SELECTED RATIOS:*
Return on average
 equity.................   12.59 %     12.46 %    13.51%    12.70%    9.72 %    8.61 %    6.53 %
Return on average
 tangible equity........   12.59 %     12.46 %    13.51%    12.70%    9.72 %    8.61 %    6.53 %
Return on average
 assets.................    1.29 %      1.36 %     1.47%     1.28%    1.05 %    1.01 %    0.83 %
Efficiency ratio (non-
 interest expense as a
 percentage of total
 revenues)..............   54.74 %     50.04 %    48.50%    53.66%   65.53 %   66.88 %   89.83 %
Efficiency ratio
 excluding the
 amortization of
 intangibles and
 goodwill...............   54.74 %     50.04 %    48.50%    53.66%   65.53 %   66.88 %   89.83 %
Average equity to
 average assets.........   10.25 %     10.88 %    10.91%    10.08%   10.83 %   11.70 %   12.67 %
Leveraged capital
 ratio..................   10.17 %     11.10 %    11.00%    10.90%   10.50 %   11.70 %   12.30 %
Nonperforming loans and
 leases to total loans
 and leases.............        --      0.07 %        --     0.56%        --        --    2.11 %
Nonperforming assets to
 total assets...........        --      0.03 %        --     0.30%    1.03 %    1.74 %    2.77 %
Net chargeoffs
 (recoveries) to average
 loans and leases.......   (0.11)%     (0.05)%        --     0.09%   (0.01)%   (0.11)%   (0.11)%
Allowance for loan or
 lease losses to total
 loans and leases.......    1.26 %      1.10 %     0.96%     0.90%    1.19 %    2.05 %    2.19 %
Allowance for loan or
 lease losses to
 nonperforming loans and
 leases.................       N/A  1,574.47 %       N/A   160.56%       N/A       N/A  104.38 %
                          ========  ==========  ========  ========  ========  ========  ========
</TABLE>
- --------
* Selected ratios for the interim periods ending September 30, 1998 and
   September 30, 1999 are annualized.

                                       10
<PAGE>

                                    Combined
        Unaudited Pro Forma Combined Consolidated Financial Information
                (dollars in thousands, except per share amounts)

<TABLE>
<CAPTION>
                           Nine Months Ended
                             September 30,       As of and for the Years Ended December 31,
                          --------------------  -------------------------------------------------
                            1999       1998       1998       1997      1996      1995      1994
                          --------  ----------  ---------  --------  --------  --------  --------
<S>                       <C>       <C>         <C>        <C>       <C>       <C>       <C>
STATEMENT OF OPERATIONS
 DATA:
Net interest income.....  $ 20,172  $   19,151  $  25,603  $ 23,562  $ 20,495  $ 18,006  $ 13,266
Credit (Provision) for
 possible loan or lease
 losses.................      (316)       (286)      (436)     (705)      (40)   (1,045)       36
Other income............     1,974       1,270      1,824     1,490     1,199     1,543     1,149
Other expenses..........   (12,389)    (10,716)   (14,462)  (12,888)  (12,505)  (11,665)  (10,199)
                          --------  ----------  ---------  --------  --------  --------  --------
Income before income
 taxes..................     9,441       9,419     12,529    11,459     9,149     6,839     4,252
Income taxes............    (3,803)     (3,856)    (5,040)   (4,749)   (3,757)   (2,934)   (1,731)
                          --------  ----------  ---------  --------  --------  --------  --------
Net income..............  $  5,638  $    5,563  $   7,489  $  6,710  $  5,392  $  3,905  $  2,521
                          ========  ==========  =========  ========  ========  ========  ========
PER SHARE DATA:
Net income per share--
 basic..................  $   1.62  $     1.53  $    2.06  $   1.86  $   1.51  $   1.13  $   0.89
Net income per share--
 diluted................      1.50        1.42       1.92      1.74      1.41      1.08      0.83
Cash dividends per
 share..................      0.42        0.42       0.56      0.45      0.33      0.21      0.16
Shareholders' equity per
 share..................     14.49       13.73      14.13     12.85     11.80     10.77      9.60
Tangible shareholders'
 equity per share.......     13.41       12.57      13.01     11.82     10.58      9.42      8.17
                          ========  ==========  =========  ========  ========  ========  ========
BALANCE SHEET DATA:
Balance sheet totals--
 end of period:
 Assets.................  $559,209  $  482,817  $ 494,736  $455,963  $431,187  $352,692  $293,485
 Loans and leases.......   377,386     313,652    335,943   292,737   251,288   208,335   182,948
 Deposits...............   449,603     402,581    405,857   361,391   334,083   271,641   254,159
 Shareholders' equity...    50,183      49,588     50,739    46,764    43,157    37,715    33,069
Average balance sheet
 amounts:
 Assets.................  $525,514  $  465,204  $ 469,317  $439,187  $379,529  $310,339  $233,208
 Loans and leases.......   358,627     295,295    301,910   267,332   224,680   186,877   145,390
 Earning assets.........   485,859     433,726    436,481   402,390   347,639   281,711   211,091
 Deposits...............   437,578     382,251    385,887   354,604   296,834   254,031   202,201
 Shareholders' equity...    49,374      48,062     48,511    43,661    39,619    35,128    28,282
                          ========  ==========  =========  ========  ========  ========  ========
SELECTED RATIOS:*
Return on average
 equity.................   15.23 %     15.43 %     15.44%    15.37%    13.61%    11.12%     8.91%
Return on average
 tangible equity........   17.52 %     17.83 %     17.84%    18.20%    16.97%    14.75%    10.24%
Return on average
 assets.................    1.43 %      1.59 %      1.60%     1.53%     1.42%     1.26%     1.08%
Efficiency ratio (non-
 interest expense as a
 percentage of total
 revenues)..............   55.94 %     52.48 %     52.73%    51.45%    57.64%    59.67%    70.75%
Efficiency ratio
 excluding the
 amortization of
 intangibles and
 goodwill...............   54.40 %     50.82 %     51.06%    49.56%    55.34%    56.76%    69.60%
Average equity to
 average assets.........    9.40 %     10.33 %     10.34%     9.94%    10.44%    11.32%    12.13%
Leveraged capital
 ratio..................    8.52 %      9.48 %      9.78%     9.58%    11.42%    12.65%    12.11%
Nonperforming loans and
 leases to total loans
 and leases.............    0.33 %      0.15 %      0.07%     0.27%     0.22%     0.43%     3.38%
Nonperforming assets to
 total assets...........    0.22 %      0.10 %      0.05%     0.17%     0.52%     0.94%     3.20%
Net chargeoffs
 (recoveries) to average
 loans and leases.......   (0.05)%     (0.03)%       --       0.10%     0.04%     0.25%     0.84%
Allowance for loan or
 lease losses to total
 loans and leases.......    1.59 %      1.74 %      1.64%     1.74%     1.84%     2.22%     2.21%
Allowance for loan or
 lease losses to
 nonperforming loans and
 leases.................  483.91 %  1,129.05 %  2,279.70%   646.81%   205.73%   139.96%    43.09%
                          ========  ==========  =========  ========  ========  ========  ========
</TABLE>
- --------
* Selected ratios for the interim periods ending September 30, 1998 and
  September 30, 1999 are annualized.

                                       11
<PAGE>

         Historical and Pro Forma Per Share Data for SJNB and Saratoga

   We have summarized below the per share information for our respective
companies on an historical, pro forma combined and equivalent basis.

   We have calculated the pro forma combined per share data for net income
using the weighted average number of shares of SJNB common stock outstanding
for the periods presented, increased by the weighted average number of shares
of Saratoga common stock outstanding for the periods presented multiplied by an
assumed exchange ratio of 0.70 shares of SJNB common stock for each share of
Saratoga common stock, as if these shares were outstanding for each period
presented. The pro forma combined per share data for dividends declared
represents the historical dividends for SJNB common stock. The pro forma
combined book value per share has been calculated using shares of outstanding
SJNB common stock increased by the shares of outstanding Saratoga common stock
multiplied by an assumed exchange ratio of 0.70 for each share of Saratoga
common stock as if these shares were outstanding as of the dates presented.

   The equivalent pro forma Saratoga shares information has been calculated by
multiplying the pro forma combined per share information by an assumed exchange
ratio of 0.70.

<TABLE>
<CAPTION>
                                            SJNB               Saratoga
                                        Common Stock         Common Stock
                                    -------------------- ---------------------
                                               Pro forma            Pro forma
                                    Historical Combined  Historical Equivalent
                                    ---------- --------- ---------- ----------
<S>                                 <C>        <C>       <C>        <C>
Shareholders' equity per share:
  September 30, 1999...............   $14.92    $14.49     $9.50      $10.14
  December 31, 1998................    14.48     14.13      9.36        9.89
  December 31, 1997................    13.30     12.85      8.31        8.99
  December 31, 1996................    12.14     11.80      7.69        8.26

Tangible shareholders' equity per
 share:
  September 30, 1999...............    13.34     13.41      9.50        9.39
  December 31, 1998................    12.84     13.01      9.36        9.11
  December 31, 1997................    11.80     11.82      8.31        8.27
  December 31, 1996................    10.40     10.58      7.69        7.40

Dividends declared:
  Nine months ended September 30,
   1999............................     0.42      0.42      0.20        0.29
  Year ended December 31, 1998.....     0.56      0.56      0.17        0.39
  Year ended December 31, 1997.....     0.45      0.45      0.13        0.32
  Year ended December 31, 1996.....     0.33      0.33      0.12        0.23

Net income:
 Basic:
  Nine months ended September 30,
   1999............................     1.77      1.62      0.90        1.13
  Year ended December 31, 1998.....     2.23      2.06      1.19        1.44
  Year ended December 31, 1997.....     2.04      1.86      1.01        1.30
  Year ended December 31, 1996.....     1.73      1.51      0.71        1.06

 Diluted:
  Nine months ended September 30,
   1999............................     1.68      1.50      0.80        1.05
  Year ended December 31, 1998.....     2.11      1.92      1.07        1.34
  Year ended December 31, 1997.....     1.94      1.74      0.92        1.22
  Year ended December 31, 1996.....     1.64      1.41      0.64        0.99
</TABLE>

                                       12
<PAGE>

                                  RISK FACTORS

   In deciding whether to vote in favor of the merger, shareholders of Saratoga
and SJNB should consider the following factors, in addition to the other
matters described or incorporated by reference in this document:

Additional Shares of SJNB Common Stock Could Be Issued Which Could Result in a
Decline in the Market Price of Such Stock

   Shares of SJNB common stock eligible for future sale could have a dilutive
effect on the market for SJNB common stock and could adversely affect the
market price. The articles of incorporation of SJNB authorize the issuance of
20,000,000 shares of common stock, of which 2,352,431 shares were outstanding
at October 22, 1999 and 5,000,000 shares of preferred stock, of which no shares
were outstanding at October 22, 1999. Pursuant to its stock option plan, at
October 22, 1999, SJNB had outstanding options to purchase an aggregate of
567,330 shares of SJNB common stock. As of October 22, 1999, 156,887 shares of
SJNB common stock remained available for option grants under SJNB's stock
option plans. The merger agreement does not restrict SJNB's ability to grant
additional options under SJNB's stock option plan or with respect to a takeover
proposal to which SJNB is a party. See "The Merger--Purchase Price and
Potential Adjustments." Sales of substantial amounts of SJNB common stock in
the public market following the merger could adversely affect the market price
of SJNB common stock.

   There are no restrictions in the merger agreement preventing SJNB from
issuing additional shares of SJNB common stock after the merger. There can be
no assurance given as to the market value of SJNB common stock after the merger
based on future acquisitions, if any, or other factors, including but not
limited to, general economic conditions or fluctuating interest rates.

The Financial Condition of SJNB and Saratoga May Be Negatively Impacted by
Worsening Economic Conditions, Rising Interest Rates or Acts of Nature

   The loan portfolios of SJNB and Saratoga are dependent on real estate. At
September 30, 1999, real estate served as the principal source of collateral
with respect to approximately 74% of Saratoga's loan portfolio, 52% of SJNB's
loan portfolio and 56% of pro forma combined SJNB and Saratoga's loan
portfolio. A worsening of current economic conditions or rising interest rates
could have an adverse effect on the demand for new loans, the ability of
borrowers to repay outstanding loans, the value of real estate and other
collateral securing loans and the value of the available-for-sale investment
portfolio, as well as SJNB's and Saratoga's financial condition and results of
operations in general and the market value for SJNB Common Stock and Saratoga
Common Stock. Acts of nature, including earthquakes and floods, which may cause
uninsured damage and other loss of value to real estate that secures these
loans, may also negatively impact SJNB's and Saratoga's financial condition.

Customers of Saratoga National Bank May Not Be Retained and SJNB May Not Be
Able to Realize Anticipated Operating Cost Savings

   Upon the consummation of the merger, the separate corporate existence of
Saratoga will cease and Saratoga will be merged into SJNB. It is also
anticipated that Saratoga National Bank will be merged into San Jose National
Bank immediately after the merger. At that time, it is anticipated that the
Saratoga National Bank branch located in San Jose will have been closed or
consolidated. Management of SJNB expects that SJNB will be able to serve
customers of Saratoga National Bank's San Jose branch at other existing San
Jose National Bank or Saratoga National Bank branches. SJNB also anticipates
that, after the effective time of the merger, a significant percentage of
Saratoga National Bank's existing employees and customers will be retained.

   There are no assurances that Saratoga National Bank customers will not move
their banking relationships to other financial institutions and that a greater
than anticipated number of Saratoga National Bank employees

                                       13
<PAGE>

will not remain employed by SJNB after the merger. In addition, while SJNB
expects to achieve operating cost savings through the elimination of
duplicative corporate and administrative expenses and the consolidation of
banking operations, there can be no assurance that SJNB will be able to realize
such cost savings.

The Price of SJNB Common Stock May Decline

   The merger consideration the Saratoga shareholders will receive may be
affected by potential changes in the market price of SJNB common stock. This
means that at the time of the special meetings, the Saratoga shareholders will
not know the exact value of the SJNB common stock that they will receive when
the merger is completed. The market price of SJNB common stock when the merger
takes place may vary from the price at the date of this document and at the
date of the special meetings. Such variations in the market price of SJNB
common stock may result from changes in the business, operations or prospects
of SJNB, Saratoga or the combined company, market assessments of the likelihood
that the merger will be consummated and the timing thereof, regulatory
considerations, general market and economic conditions and other factors. We
urge you to obtain current market quotations for SJNB common stock. See "The
Merger--Purchase Price and Potential Adjustments."

The Year 2000 Problem May Adversely Affect SJNB, Saratoga or the Combined
Company

   The "Year 2000 issue" relates to the fact that many computer programs and
other technology utilizing microprocessors use only two digits to represent a
year, such as "98" to represent "1998." In the year 2000, such
programs/processors could incorrectly treat the year 2000 as the year 1900.
This issue has grown in importance as the use of computers and microprocessors
has become more pervasive throughout the economy, and interdependencies between
systems has multiplied. The business of SJNB and Saratoga is dependent on
technology and data processing. SJNB and Saratoga could be affected either
directly or indirectly by the Year 2000 issue. This could happen if any of
their respective critical computer systems or equipment containing embedded
logic fail, if the local infrastructure (electric power, communications or
water system) fails, if their respective significant vendors are adversely
impacted, or if their respective borrowers or depositors are significantly
impacted by their internal systems or those of their customers or suppliers.

   The business of SJNB and Saratoga also involves non-information technology
("IT") products and services, some of which have embedded technology which
might not be Year 2000 compliant. Some non-IT products and services involve
various infrastructure issues, such as power, communications and water, as well
as elevators, ventilation and air conditioning equipment.

   Due to the numerous issues and problems which might arise and the lack of
guarantees concerning Year 2000 readiness from non-IT service providers, such
as power and communications systems vendors, SJNB and Saratoga cannot quantify
the potential cost of problems if their respective renovation and
implementation efforts or the efforts of significant vendors or customers are
not successful. As a result, Year 2000 problems experienced by SJNB or Saratoga
or their respective vendors or customers may adversely affect the business,
financial condition or results of operations of SJNB, Saratoga or the combined
company.

                                       14
<PAGE>

                INFORMATION REGARDING FORWARD-LOOKING STATEMENTS

   This joint proxy statement/prospectus contains forward-looking statements
regarding each of Saratoga and SJNB and the combined company following the
merger, including statements relating to:

  . the financial condition, results of operations and business of SJNB
    following completion of the merger,

  . cost savings, enhanced revenues and accretion to reported earnings that
    are expected to be realized from the merger, and

  . the restructuring charges expected to be incurred in connection with the
    merger.

   These forward-looking statements involve certain risks and uncertainties.
Factors that may cause actual results to differ materially from those
contemplated by such forward-looking statements include, among others, the
following possibilities:

  . expected cost savings from the merger cannot be fully realized or
    realized within the expected time frame;

  . revenues following the merger are lower than expected or deposit
    withdrawals, operating costs or customer loss and business disruption
    following the merger may be greater than expected;

  . competitive pressures among depository and other financial services
    companies increase significantly;

  . costs or difficulties related to the integration of the businesses of
    SJNB and Saratoga are greater than expected;

  . changes in the interest rate environment reduce interest margins, cause
    an increase in the prepayment rate on mortgages and other loans or reduce
    the demand for new loans;

  . general economic or business conditions, either internationally,
    nationally or in the states in which the combined company will be doing
    business, are less favorable than expected, resulting in, among other
    things, a deterioration in credit quality or a reduced demand for credit;

  . legislation or regulatory requirements or changes adversely affect the
    businesses in which the combined company would be engaged;

  . technology-related changes, including "Year 2000" data systems compliance
    issues, may be harder to make or more expensive than expected;

  . changes in the securities market; and

  . timing of completion of the merger may be delayed, due to regulatory
    requirements or other factors which may delay, restrict or prohibit new
    operations.

                                       15
<PAGE>

                                  INTRODUCTION

The Special Meetings: Dates, Times and Places

   SJNB. The special meeting of SJNB Financial Corp. ("SJNB") will be held at
San Jose National Bank, One North Market Street, San Jose, California, at 10:00
a.m., local time, on December 13, 1999.

   Saratoga. The special meeting of Saratoga Bancorp ("Saratoga") will be held
at Saratoga National Bank, 12000 Saratoga-Sunnyvale Road, Saratoga, California,
at 10:00 a.m., local time, on December 13, 1999.

Matters to be Considered at the Special Meetings

   SJNB. At SJNB's special meeting, holders of SJNB common stock are being
asked to approve the merger agreement, including the resulting issuance of SJNB
common stock to Saratoga's shareholders as provided under the terms of the
agreement. See "The Merger."

   Saratoga. At Saratoga's special meeting, holders of Saratoga common stock
are being asked to approve the merger agreement. See "The Merger."

Record Date; Stock Entitled to Vote; Quorum

   SJNB. Only holders of record of SJNB common stock at the close of business
on October 22, 1999, the record date for SJNB's special meeting, are entitled
to receive notice of and to vote at SJNB's special meeting. On the record date,
approximately 2,352,431 shares of SJNB common stock were issued and outstanding
and held by approximately 749 holders of record. A majority of the shares of
SJNB common stock issued and outstanding and entitled to vote on the record
date must be represented in person or by proxy at SJNB's special meeting in
order for a quorum to be present for purposes of transacting business at SJNB's
special meeting. In the event that a quorum is not present at SJNB's special
meeting, it is expected that the meeting will be adjourned or postponed to
solicit additional proxies. Holders of record of SJNB common stock on the
record date are each entitled to one vote per share on each matter to be
considered at SJNB's special meeting.

   Saratoga. Only holders of record of Saratoga common stock at the close of
business on October 22, 1999, the record date for Saratoga's special meeting,
are entitled to receive notice of and to vote at Saratoga's special meeting. On
the record date, approximately 1,588,950 shares of Saratoga common stock were
issued and outstanding and held by approximately 253 holders of record. A
majority of the shares of Saratoga common stock issued and outstanding and
entitled to vote on the record date must be represented in person or by proxy
at Saratoga's special meeting in order for a quorum to be present for purposes
of transacting business at Saratoga's special meeting. In the event that a
quorum is not present at Saratoga's special meeting, it is expected that the
meeting will be adjourned or postponed to solicit additional proxies. Holders
of record of Saratoga common stock on the record date are each entitled to one
vote per share on each matter to be considered at Saratoga's special meeting.

Votes Required

   SJNB. The approval of the merger agreement and the issuance of the shares of
SJNB common stock to Saratoga's shareholders requires the affirmative vote of a
majority of the votes cast with respect to that proposal and entitled to vote
at SJNB's special meeting. An abstention or a broker non-vote will be included
in determining the number of shares present and voting at a meeting for the
purpose of determining the presence of a quorum. Such abstentions and broker
non-votes will have the same effect as votes against the merger agreement and
consummation of the merger; however, abstentions and broker non-votes will not
have the effect of establishing dissenters' rights of SJNB shareholders. See
"--Voting of Proxies--Abstentions and Broker Non-Votes" and "Dissenters' Rights
of Appraisal--Appraisal Rights of SJNB Shareholders."

   Saratoga. The approval of the merger agreement requires the affirmative vote
of the holders of record of at least a majority of the shares of Saratoga
common stock outstanding on the record date for Saratoga's special meeting. An
abstention or a broker non-vote will be included in determining the number of
shares present and

                                       16
<PAGE>

voting at a meeting for the purpose of determining the presence of a quorum.
Such abstentions and broker non-votes will have the same effect as votes
against the merger agreement and consummation of the merger. See "--Voting of
Proxies--Abstentions and Broker Non-Votes" and "Dissenters' Rights of
Appraisal--Appraisal Rights of Saratoga Shareholders."

Share Ownership of Management

   SJNB. At the close of business on the record date, directors and executive
officers of SJNB and their affiliates beneficially owned and were entitled to
vote approximately 423,166 shares of SJNB common stock, which represented
approximately 18.0% of the shares of SJNB common stock outstanding on that
date. Each of those directors and executive officers has agreed to vote, or
cause to be voted, the SJNB common stock owned by him or her FOR approval of
the merger agreement and the resulting issuance of SJNB common stock to
Saratoga's shareholders under the terms of the merger agreement at SJNB's
special meeting.

   As of the record date, the directors and executive officers of SJNB
beneficially owned shares of SJNB common stock as described in the following
table. Unless otherwise indicated, each director and executive officer listed
below possesses sole voting power and sole investment power. All of the shares
shown in the following table are owned both of record and beneficially except
as indicated in the notes to the table. The address for beneficial owners, all
of whom are incumbent directors and officers of SJNB and San Jose National
Bank, is the address of SJNB, One North Market Street, San Jose, California
95113.

<TABLE>
<CAPTION>
                                                             Amount and
                                                             Nature of            Percent
Name and Address of                                          Beneficial              of
Beneficial Owner          Position                           Ownership            Class(1)
- -------------------       --------                           ----------           --------
<S>                       <C>                                <C>                  <C>
Ray S. Akamine..........  Director                             15,000(2)             *
Robert A. Archer........  Chairman of the Board of
                           Directors                           58,584(2)(3)         2.49
Albert V. Bruno.........  Director                             21,165(2)             *
Rod Diridon, Sr.........  Director                              9,349(2)             *
F. Jack Gorry...........  Director                             15,000(2)             *
Arthur K. Lund..........  Director                             73,778(2)(4)(5)      3.14
Louis Oneal.............  Director                             73,697(2)(4)         3.14
Diane P. Rubino.........  Director                             21,337(6)             *
Douglas L. Shen.........  Director                             72,860(2)(7)         3.10
Gary S. Vandeweghe......  Director                             42,503(2)(8)         1.81
James R. Kenny..........  President and Chief Executive
                           Officer and Director               145,082(9)(10)        6.17
Eugene E. Blakeslee.....  Executive Vice President and
                           Chief Financial Officer            112,619(9)(11)        4.79
Frederic H. Charpiot....  Senior Vice President and Chief
                           Credit Officer                      81,108(9)(12)(13)    3.45
Margo F. Culcasi........  Senior Vice President, Liability
                           Management                          19,336(14)            *
Judith Doering-Nielsen..  Senior Vice President and Senior
                           Lending Officer                     20,246(15)            *
All directors and
 executive officers as a
 group (15 persons).....                                      605,326(16)          25.75
</TABLE>
- --------
  * Less than 1% of the outstanding SJNB common stock.

 (1) Includes stock options exercisable within 60 days of October 22, 1999.

 (2) Includes 9,000 stock options exercisable within 60 days of October 22,
     1999.

 (3) Includes 3,720 shares owned of record by a trust of which Mr. Archer is a
     trustee.

 (4) Includes 51,884 shares owned of record by a trust of which Messrs. Lund
     and Oneal are trustees, as to which shares they disclaim beneficial
     ownership.

 (5) Includes 3,782 shares owned of record by a trust of which Mr. Lund is the
     trustee and beneficiary.

 (6) Includes 7,000 stock options exercisable within 60 days of October 22,
     1999.

                                       17
<PAGE>

 (7) Includes 30,816 shares owned of record by a trust of which Dr. Shen is a
     trustee and beneficiary.

 (8) Includes 33,503 shares owned of record by a trust of which Mr. Vandeweghe
     is a trustee.

 (9) Includes 58,081 shares held in the SJNB Cash or Deferred Profit Sharing
     Plan (the "401(k)") of which Messrs. Kenny, Blakeslee and Charpiot are
     trustees and beneficiaries and with regard to which shares Messrs. Kenny,
     Blakeslee and Charpiot have sole or shared voting power. Messrs. Kenny,
     Blakeslee and Charpiot disclaim beneficial ownership of the 401(k) shares,
     other than such shares allocated to their respective personal accounts in
     the 401(k): 4,359, 3,336 and 2,350, respectively.

(10) Includes 29,800 stock options exercisable within 60 days of October 22,
     1999.

(11) Includes 22,400 stock options exercisable within 60 days of October 22,
     1999.

(12) Includes 16,560 stock options exercisable within 60 days of October 22,
     1999.

(13) Includes 6,466 shares owned of record by a trust of which Mr. Charpiot is
     a trustee.

(14) Includes 13,400 stock options exercisable within 60 days of October 22,
     1999.

(15) Includes 12,000 stock options exercisable within 60 days of October 22,
     1999.

(16) Includes 182,160 stock options exercisable within 60 days of October 22,
     1999.

   Saratoga. At the close of business on the record date, directors and
executive officers of Saratoga and their affiliates beneficially owned and were
entitled to vote approximately 565,513 shares of Saratoga common stock, which
represented approximately 30.18% of the shares of Saratoga common stock
outstanding on that date. Each of those directors and executive officers has
agreed to vote, or cause to be voted, the Saratoga common stock owned by him or
her FOR approval of the merger agreement at Saratoga's special meeting. See
"The Merger--Interests of Saratoga Officers and Directors in the Merger."

   As of the record date, the directors and executive officers of Saratoga
beneficially owned shares of Saratoga common stock as described in the
following table. Unless otherwise indicated, each director and executive
officer listed below possesses sole voting power and sole investment power. All
of the shares shown in the following table are owned both of record and
beneficially except as indicated in the notes to the table. The address for
beneficial owners, all of whom are incumbent directors and officers of Saratoga
and Saratoga National Bank, is the address of Saratoga, 12000 Saratoga-
Sunnyvale Road, Saratoga, California 95070.

<TABLE>
<CAPTION>
                                                             Amount and
                                                             Nature of     Percent
Name and Address of                                          Beneficial       of
Beneficial Owner          Position                           Ownership     Class(1)
- -------------------       --------                           ----------    --------
<S>                       <C>                                <C>           <C>
Victor E. Aboukhater....  Director                             52,492(2)     3.24
Rogert G. Egan..........  Director                             57,547(3)     3.55
William D. Kron.........  Director                             48,955(4)     3.03
Earl L. Lanna...........  Sr. Vice President, Sr. Loan
                           Officer of Saratoga National
                           Bank                                31,704(5)     1.96
John F. Lynch, III......  Director                             54,209(6)     3.35
V. Ronald Mancuso.......  Director                            109,475(7)     6.76
Richard L. Mount........  Chairman, President and Chief
                           Executive Officer                  176,034(8)    10.67
Mary Page Rourke........  Treasurer, Sr. Vice President and
                           Chief Financial Officer of
                           Saratoga National Bank              35,004(9)     2.17
All directors and execu-
 tive officers as a
 group (8 persons)......                                      565,513(10)   30.18
</TABLE>
- --------
 (1) Includes stock options exercisable within 60 days of October 22, 1999.

 (2) Includes 32,875 stock options exercisable within 60 days of October 22,
     1999.

 (3) Includes 32,875 stock options exercisable within 60 days of October 22,
     1999.

 (4) Includes 32,875 stock options exercisable within 60 days of October 22,
     1999.

                                       18
<PAGE>

 (5) Includes 30,042 stock options exercisable within 60 days of October 22,
     1999.

 (6) Includes 826 shares of common stock owned by Joan Lynch, his wife, and
     32,875 stock options exercisable within 60 days of October 22, 1999.

 (7) Includes 2,237 shares owned by Merrill Lynch as custodian for the V.
     Ronald Mancuso IRA, and 32,875 stock options exercisable within 60 days of
     October 22, 1999.

 (8) Includes 412 shares of common stock owned by Branda Mount, a minor
     daughter, under the UTMA, Richard L. Mount, Custodian, and 62,875 stock
     options exercisable within 60 days of October 22, 1999.

 (9) Includes 30,042 stock options exercisable within 60 days of October 22,
     1999.

(10) Includes 287,334 stock options exercisable within 60 days of October 22,
     1999.

Voting of Proxies

   Submitting Proxies. SJNB and Saratoga shareholders may vote their shares in
person by attending their respective special meeting or vote their shares by
proxy by completing the enclosed proxy card, signing and dating it and mailing
it in the enclosed postage pre-paid envelope. IF A WRITTEN PROXY CARD IS SIGNED
BY A SHAREHOLDER AND RETURNED WITHOUT INSTRUCTIONS, THE SHARES REPRESENTED BY
THE PROXY WILL BE VOTED FOR THE PROPOSALS PRESENTED AT SJNB'S SPECIAL MEETING
OR FOR THE PROPOSALS PRESENTED AT SARATOGA'S SPECIAL MEETING, AS APPLICABLE.
SJNB and Saratoga shareholders whose shares are held in "street name" (i.e., in
the name of a broker, bank or other record holder) must either direct the
record holder of their shares as to how to vote their shares or obtain a proxy
from the record holder to vote at their respective special meeting.

   Revoking Proxies. SJNB and Saratoga shareholders of record may revoke their
proxies at any time before the time their proxies are voted at SJNB's special
meeting or Saratoga's special meeting, respectively. Proxies may be revoked by
written notice, including by telegram or telecopy, to the Corporate Secretary
of SJNB or Saratoga, as applicable, by a later-dated proxy signed and returned
by mail or by attending SJNB's special meeting or Saratoga's special meeting,
as applicable, and voting in person. Attendance at SJNB's special meeting or
Saratoga's special meeting will not in and of itself constitute a revocation of
a proxy. The shareholder must inform the secretary at the special meeting,
prior to the vote, that he or she wants to revoke his or her proxy and vote in
person. Any written notice of a revocation of a proxy must be sent so as to be
delivered before the taking of the vote at the applicable special meeting as
follows:

<TABLE>
     <S>                                    <C>
     For SJNB Shareholders, to:             For Saratoga Shareholders, to:

     SJNB Financial Corp.                   Saratoga Bancorp
     One North Market Street                12000 Saratoga-Sunnyvale Road
     San Jose, California 95113             Saratoga, California 95070
</TABLE>

   Abstentions and Broker Non-Votes. The presence, in person or by properly
executed proxy, of the holders of a majority of the outstanding shares is
necessary to constitute a quorum at each of SJNB's special meeting and
Saratoga's special meeting. Abstentions and broker non-votes (as described
below) will be counted solely for the purpose of determining whether a quorum
is present. Under the applicable rules of the National Association of
Securities Dealers, Inc., brokers or members who hold shares in street name for
customers who are the beneficial owners of such shares are prohibited from
giving a proxy to vote those shares with respect to the approval of the merger
agreement in the absence of specific instructions from such customers. We refer
to these as "broker non-votes." Abstentions and broker non-votes will have the
same effect as a vote against the merger agreement at either the SJNB special
meeting or the Saratoga special meeting, as applicable. Abstentions and broker
non-votes will not, however, have the effect of establishing dissenters' rights
of SJNB shareholders. See "Dissenters' Rights of Appraisal--Appraisal Rights of
SJNB Shareholders."

   If any other matters are properly presented for consideration at SJNB's
special meeting, in the case of the SJNB shareholders, or at Saratoga's special
meeting, in the case of the Saratoga shareholders, the persons named in the
enclosed form of proxy will have discretion to vote or not vote on those
matters in accordance

                                       19
<PAGE>

with their best judgment, unless authorization to use that discretion is
withheld. If a proposal to adjourn SJNB's special meeting or Saratoga's special
meeting is properly presented, however, the persons named in the enclosed form
of proxy will not have discretion to vote in favor of the adjournment proposal
any shares which have been voted against the proposal(s) to be presented at the
respective special meetings.

   Neither SJNB nor Saratoga is aware of any matters expected to be presented
at its respective special meeting other than as described in their respective
notice of special meeting. The cost of solicitation of proxies will be paid by
SJNB and Saratoga, as applicable. In addition to solicitation by mail, the
directors, officers and employees of SJNB and Saratoga may also solicit proxies
from shareholders by telephone, facsimile, telegram or in person. Arrangements
will also be made with brokerage houses and other custodians, nominees and
fiduciaries to send the proxy materials to beneficial owners; and SJNB or
Saratoga, as the case may be, will, upon request, reimburse those brokerage
houses and custodians for their reasonable expenses in so doing. Neither SJNB
nor Saratoga has retained a proxy solicitor. In the event SJNB and Saratoga
jointly retain a proxy solicitor to aid in the solicitation of proxies and to
verify certain records related to the solicitations, such proxy solicitor will
receive a fee not exceeding $10,000 as compensation for its services and
reimbursement for its related out-of-pocket expenses.

   Shareholders who submit proxy cards should not send in any stock
certificates with their proxy cards. A letter of transmittal with instructions
for the surrender of certificates representing shares of Saratoga common stock
will be mailed by SJNB to former Saratoga shareholders shortly after the merger
is completed. See "The Merger--Exchange of Saratoga Stock Certificates;
Fractional Interests."

   Recommendation of the SJNB Board of Directors and Saratoga Board of
Directors. Each of the SJNB Board of Directors and Saratoga Board of Directors
has unanimously approved the merger described above and unanimously recommends
that their respective shareholders vote FOR the merger at their respective
special meetings.

                                       20
<PAGE>

               INFORMATION ABOUT SJNB AND SAN JOSE NATIONAL BANK

   SJNB is a bank holding company registered under the Bank Holding Company Act
of 1956, as amended (the "BHC Act"). SJNB was incorporated under the laws of
the State of California on April 18, 1983. Its principal office is located at
One North Market Street, San Jose, California 95113, and its telephone number
is (408) 947-7562.

   SJNB owns 100% of the issued and outstanding common shares of San Jose
National Bank. San Jose National Bank was incorporated on November 23, 1981 and
commenced business in San Jose, California, on June 10, 1982. SJNB acquired
Business Bancorp and its wholly-owned subsidiary, California Business Bank, on
October 1, 1994. Operations of SJNB and Business Bancorp were consolidated into
a single location at One North Market Street, San Jose, California 95113. San
Jose National Bank engages in the general commercial banking business with
special emphasis on the banking needs of the business and professional
communities in San Jose and the surrounding areas.

   On January 2, 1996, San Jose National Bank acquired Astra Financial Corp.
for approximately $760,000. Its business was merged into the Bank's Financial
Services Division, by adding approximately $1.9 million of factored
receivables. Astra Financial Corp. was liquidated on January 5, 1996, and its
assets were transferred to San Jose National Bank. San Jose National Bank's
Financial Services Division is located at 95 South Market Street, San Jose,
California 95113. On May 22, 1998, SJNB acquired all of the stock of a private
company, Epic Funding Corporation ("Epic"), pursuant to a definitive agreement
dated April 13, 1998. In connection with the acquisition, which was structured
as a tax-free reorganization, SJNB issued 12,223 shares of its common stock and
paid $110,000 to Epic's sole shareholder in exchange for all of Epic's
outstanding stock. The total purchase price for Epic was $611,000, while Epic's
net equity was $28,000. Goodwill amounted to $759,000, including certain
expenses of the transaction. Epic provides direct and vendor lease programs and
accounts receivable financing to manufacturers and equipment users throughout
California and across parts of the United States. Epic is now a wholly-owned
subsidiary of San Jose National Bank. Epic's office is located in Danville,
California, together with a small de novo branch of San Jose National Bank at
the same facility which opened July 1, 1998.

   San Jose National Bank accepts checking and savings deposits, offers money
market deposit accounts and certificates of deposit, makes secured and
unsecured commercial and other installment and term loans and offers other
customary banking services. San Jose National Bank offers banking services
generally, but it places primary emphasis on lending for real estate purposes
and specialized lending to businesses and professionals. Loans for real estate
purposes include term financing for commercial facilities and real estate
construction loans mainly for residential and commercial properties. Loans to
businesses and professionals include accounts receivable financing, equipment
financing, commercial loans, SBA loans and letters of credit. SJNB provides
commercial banking, factoring and leasing services principally through San Jose
National Bank, San Jose National Bank's Financial Services Division and Epic.
Although San Jose National Bank has neither a trust nor an international
banking department, it has arranged to provide these services through its
correspondent banks. As a bank holding company, SJNB is authorized to engage in
the activities permitted under the BHC Act and regulations thereunder.

                                       21
<PAGE>

             INFORMATION ABOUT SARATOGA AND SARATOGA NATIONAL BANK

   Saratoga is a bank holding company registered under the BHC Act. Saratoga's
principal asset is the common stock of Saratoga National Bank, a national
banking association organized under the laws of the United States and the
wholly-owned and sole subsidiary of Saratoga. Saratoga itself does not engage
in any business activities other than the ownership of Saratoga National Bank
and investment of its available funds. Saratoga was incorporated in California
on December 8, 1981. Saratoga National Bank commenced operations on November 8,
1982. Saratoga National Bank conducts a commercial and retail banking business,
which includes accepting demand, savings and time deposits and making
commercial, real estate and consumer loans, and provides a variety of banking
services to businesses, governmental units and individuals. It also offers
installment note collections, issues cashier's checks, sells traveler's checks
and provides other customary banking services. Saratoga National Bank's
deposits are insured by the FDIC up to the legal limits thereupon. Saratoga
National Bank does not offer trust services or international banking services
and does not plan to do so in the near future. As a bank holding company,
Saratoga is authorized to engage in the activities permitted under the BHC Act
and regulations thereunder.

                                       22
<PAGE>

                                   THE MERGER

Background of the Merger

   The following is a brief description of the events that resulted in the
execution of the Agreement and Plan of Merger dated as of August 27, 1999 among
SJNB, Saratoga and Saratoga National Bank.

   On June 29, 1998, First Security Van Kasper was engaged by Saratoga to act
as its exclusive financial advisor to render advice concerning possible
strategic alternatives designed to maximize shareholder value. Thereafter, the
Saratoga Board of Directors considered various strategic alternatives with the
assistance of First Security Van Kasper, including the possibility of a
business combination.

   After considering such alternatives, preliminary discussion with SJNB and
another financial institution resulted in execution of confidentiality
agreements on or about July 28, 1998 pursuant to which certain information
regarding Saratoga and Saratoga National Bank was provided to SJNB and the
other institution. Discussions followed between the respective parties to the
confidentiality agreements to evaluate the information provided and whether a
business combination could be structured that would meet the objectives of the
Saratoga Board of Directors. In the case of SJNB, discussions continued from
time to time after the date of execution of the confidentiality agreement until
late in the fourth quarter of 1998, when the discussions with SJNB and the
other institution terminated, primarily because the Saratoga Board of Directors
was not satisfied that a business combination could be structured which
maximized shareholder value consistent with its objectives compared to
Saratoga's independent business plan.

   In the first quarter of 1999, the Saratoga Board of Directors continued its
review of Saratoga's business plan and year-end 1998 results of operations. The
Board determined to reinitiate discussions with SJNB and to preliminarily
explore the prospects for a strategic business combination with three other
institutions which had not previously been contacted. On May 20, 1999, SJNB
contacted Saratoga and expressed interest in further discussions regarding a
possible business combination. Confidentiality agreements were executed with
the three other institutions, but a satisfactory business combination proposal
did not result from discussions with those institutions and the Saratoga Board
of Directors determined to continue discussions solely with SJNB.

   The parties commenced their respective due diligence examinations on June
23, 1999, in the case of Saratoga, and June 22, 1999 in the case of SJNB. At
its regularly scheduled meeting held on June 23, 1999, the Board of Directors
of SJNB discussed and unanimously approved changes to certain significant terms
of the proposed business combination in order to try to satisfy the objectives
of Saratoga. Immediately following such meeting, SJNB contacted Saratoga,
amended certain terms of its proposal and proposed additional terms for a
business combination. On June 25, 1999, a draft merger agreement, together with
a draft stock option agreement and other ancillary agreements, were distributed
to Saratoga and its legal and financial advisors. The draft merger agreement
contemplated a transaction structure whereby Saratoga National Bank would
remain a separate subsidiary in a multi-bank holding company. Following further
discussions among Saratoga, SJNB and their respective advisors, a revised draft
definitive merger agreement and related agreements were presented to the Boards
of Directors of Saratoga and Saratoga National Bank for review at a joint
special meeting held on July 23, 1999. Thereafter, Saratoga and SJNB, and their
respective advisors continued negotiations regarding various merger issues
reflected in the draft merger agreement and related agreements.

   On July 28, 1999, a draft definitive merger agreement, together with the
draft stock option agreement and related ancillary agreements, were presented
to the Board of Directors of SJNB for review. At such meeting, the Board
concluded that a single-bank (rather than a multi-bank) holding company
structure was required to better realize its business objectives. As a result,
the SJNB Board of Directors instructed its management to try to restructure the
transaction to provide for the merger of San Jose National Bank and Saratoga
National Bank.

   A revised draft definitive merger agreement, together with the draft stock
option agreement and related ancillary agreements, were presented to the Boards
of Directors of Saratoga and Saratoga National Bank for

                                       23
<PAGE>

review at a joint special meeting held on July 29, 1999. Various matters
requiring resolution (including the change to a single-bank holding company
structure) resulted in further negotiations. Further revised versions of the
agreements were prepared and presented to the Boards of Directors of Saratoga
and Saratoga National Bank for review at joint special meetings held on August
17 and August 26, 1999. Following review of certain matters requiring further
negotiation during a joint special meeting held in the morning of August 27,
1999, and negotiation of those matters during the day, the Boards of Directors
of Saratoga and Saratoga National Bank again reviewed the status of
negotiations during a joint special meeting held in the late afternoon of
August 27, 1999, and authorized management to execute the merger agreement and
the stock option agreement. The merger agreement was executed by SJNB, Saratoga
and Saratoga National Bank, and the stock option agreement was executed by SJNB
and Saratoga in the evening of August 27, 1999.

   Annex A to the joint proxy statement/prospectus contains a copy of the
merger agreement, which agreement is incorporated by reference herein.

   See "--Reasons for the Merger; Recommendations of the Boards of Directors"
and "--Opinion of Saratoga's Financial Advisor" below.

Reasons for the Merger; Recommendations of the Boards of Directors

   SJNB. The strategy of the board of directors of SJNB for enhancing long-term
value for SJNB shareholders recognizes that further consolidation will occur in
the banking and financial services industry in the United States and that SJNB
must be in a position to take advantage of this change. Pursuant to this
strategy, management of SJNB, at the direction of the board of directors of
SJNB, continually explores and evaluates acquisition opportunities, such as the
merger of Saratoga with and into SJNB.

   In reaching the conclusion that the merger of Saratoga with and into SJNB is
fair to and in the best interests of the shareholders of SJNB, the board of
directors of SJNB considered numerous factors, including the following:

  (1) The board of directors' familiarity with and review of Saratoga's
      business, results of operations, prospects and financial condition and
      the willingness of the board of directors of Saratoga to consider a
      merger with SJNB;

  (2) Economic conditions and prospects for the markets in which SJNB and
      Saratoga operate, and competitive pressures in the financial services
      industry in general and the banking industry in particular;

  (3) The enhancement of SJNB's competitiveness and its ability to serve its
      customers, depositors, creditors, other constituents and the
      communities in which it operates as a result of a business combination
      with another California bank holding company, such as Saratoga;

  (4) Information concerning the business, results of operations, asset
      quality and financial condition of SJNB and Saratoga on a stand-alone
      and combined basis, and the future growth prospects of SJNB and
      Saratoga following the merger. In this regard, the board of directors
      of SJNB gave consideration to the results of the initial review
      conducted by SJNB's management with respect to Saratoga's business and
      operations, including, in particular, its asset quality and certain
      related conditions in the merger agreement. Such review included an
      assessment of the opportunities to achieve increased market penetration
      in its existing market and to expand into Saratoga's market area in
      California;

  (5) The possibility of achieving cost savings and operational synergies
      which the management of SJNB believes may be achieved as a result of
      the merger through the elimination of duplicative efforts;

  (6) An assessment that, in the current economic environment, expansion
      through acquisition of another financial institution is most
      economically advantageous to SJNB's shareholders when compared to other
      alternatives such as de novo branch openings or branch acquisitions;

  (7) The geographic and business fit of SJNB and Saratoga and the
      complementary nature of their respective businesses;

                                       24
<PAGE>

  (8) Information with respect to historical trading ranges and multiples for
      SJNB common stock and Saratoga common stock, and possible trading
      ranges and multiples for each on a stand-alone basis and for the two
      companies on a combined basis and the evaluation by the board of
      directors of SJNB of the financial terms of the merger and their effect
      on the shareholders of SJNB and the belief of the SJNB board of
      directors that such terms are fair to SJNB and its shareholders;

  (9) The expectation that for federal income tax purposes the merger will
      constitute a tax-free reorganization to SJNB and its subsidiaries;

  (10) The expectation that the merger will be accounted for under the
       pooling of interests method of accounting;

  (11) The terms and conditions of the merger agreement and the related
       agreements;

  (12) The likelihood of the merger being approved by the appropriate
       regulatory authorities; and

  (13) The structure of the merger and the resulting corporate entities.

   The board of directors of SJNB did not assign any relative or specific
weights to the factors considered and individual directors may have assigned
different weights to the above factors.

   The board of directors of SJNB unanimously recommends that the merger
agreement, the related agreements, the transactions contemplated thereby and
the issuance of SJNB common stock in connection therewith, be approved by the
SJNB shareholders.

   Saratoga. The board of directors of Saratoga believes that the merger is
fair to and in the best interests of the shareholders of Saratoga. In reaching
their conclusion to approve the merger, the board of directors of Saratoga
considered numerous factors, including the following:

  (1) The Saratoga board of directors' review of the provisions of the merger
      agreement and related agreements and the transactions contemplated by
      those agreements with First Security Van Kasper and with legal advisors
      and, as applicable, accounting advisors, to Saratoga and Saratoga
      National Bank;

  (2) The opinion of First Security Van Kasper that the terms of the merger
      are fair, from a financial point of view, to Saratoga shareholders; in
      this regard, the board of directors considered the premium represented
      by the consideration offered to Saratoga shareholders in relation to
      the book value per share of Saratoga common stock;

  (3) The fact that the merger is expected to be tax-deferred for federal
      income tax purposes to the holders of Saratoga common stock, other than
      in respect of cash paid in lieu of fractional shares and cash paid upon
      exercise, if any, of dissenters' rights;

  (4) The market liquidity and dividend history of SJNB common stock;

  (5) The current financial condition and prospects of SJNB;

  (6) The current financial condition and prospects of Saratoga and Saratoga
      National Bank;

  (7) The current and prospective economic and regulatory environment,
      burdens and constraints affecting banking organizations and commercial
      banks such as Saratoga and Saratoga National Bank and the changing
      competitive environment for banking services; and

  (8) The probable impact of the merger on customers and employees and the
      communities served by Saratoga and Saratoga National Bank.

   The board of directors of Saratoga did not assign relative weights to the
factors above or determine that any factor was of particular importance.
Rather, the Saratoga board made recommendations based on the totality of the
information presented to and considered by them.

                                       25
<PAGE>

   The board of directors of Saratoga unanimously recommends that the merger
agreement and related agreements and the transactions contemplated by those
agreements, including the merger of Saratoga into SJNB, be approved by the
Saratoga shareholders.

Opinion of Saratoga's Financial Advisor

   Saratoga engaged First Security Van Kasper in June 1998 to act as its
exclusive financial advisor to assist Saratoga in analyzing strategic
alternatives to maximize shareholder value, including structuring, negotiating
and effecting a satisfactory business combination transaction with another bank
holding company. Saratoga selected First Security Van Kasper because First
Security Van Kasper is a nationally recognized investment banking firm with
substantial experience in transactions similar to the merger and is familiar
with Saratoga and its business. As part of its investment banking business,
First Security Van Kasper is continually engaged in the valuation of businesses
and their securities in connection with mergers and acquisitions.

   A representative of First Security Van Kasper attended a joint special
meeting of the boards of directors of Saratoga and Saratoga National Bank held
on August 27, 1999 at which the boards considered and approved the merger
agreement. At the August 27 meeting, First Security Van Kasper rendered an oral
opinion that, as of that date, the exchange ratio was fair to Saratoga and its
shareholders from a financial point of view. That opinion was reconfirmed in
writing as of the date of this joint proxy statement/prospectus.

   The full text of First Security Van Kasper's written opinion dated the date
of this joint proxy statement/prospectus is attached as Annex C hereto and is
incorporated herein by reference.

   Saratoga shareholders are urged to read the opinion in its entirety for a
description of the procedures followed, assumptions made, matters considered,
and qualifications and limitations on the review undertaken by First Security
Van Kasper.

   First Security Van Kasper's opinion is directed to the Saratoga board of
directors and addresses only the exchange ratio of 0.70 shares of SJNB common
stock for each share of Saratoga common stock. It does not address the
underlying business decision to proceed with the merger and does not constitute
a recommendation to any shareholder as to how the shareholder should vote at
the special meeting with respect to the merger or any matter related thereto.

   In rendering its opinion, First Security Van Kasper:

  . reviewed, among other things,

    (1) the merger agreement,

    (2) Annual Reports to shareholders and Annual Reports on Form 10-K of
        SJNB,

    (3) Annual Reports to shareholders and Annual Reports on Form 10-K of
        Saratoga,

    (4) Quarterly Reports on Form 10-Q of SJNB,

    (5) Quarterly Reports on Form 10-Q of Saratoga, and

    (6) Certain internal financial analyses and forecasts for Saratoga and
        SJNB prepared by their respective managements;

  . held discussions with members of senior management of Saratoga and SJNB
    regarding their respective

    (1) past and current business operations,

    (2) regulatory relationships,

    (3) financial condition, and

    (4) future prospects of the respective companies;

                                       26
<PAGE>

  . compared certain financial and stock market information for SJNB and
    Saratoga with similar information for certain other companies with
    publicly traded securities;

  . reviewed the financial terms of certain recent business combinations in
    the banking industry; and

  . performed other studies and analyses that it considered appropriate.

   In conducting its review and arriving at its opinion, First Security Van
Kasper relied upon and assumed the accuracy and completeness of all of the
financial and other information provided to it or publicly available. First
Security Van Kasper did not attempt to verify such information independently.
First Security Van Kasper relied upon the management of SJNB and Saratoga as to
the reasonableness and achievability of the financial and operating forecasts
and projections (and assumptions and bases therefor) provided to First Security
Van Kasper. First Security Van Kasper assumed that those forecasts and
projections reflected the best available estimates and judgments of SJNB and
Saratoga management. First Security Van Kasper also assumed, without
independent verification, that the aggregate allowances for loan losses for
SJNB and Saratoga are adequate to cover loan losses. First Security Van Kasper
did not make or obtain any evaluations or appraisals of the property of SJNB or
Saratoga, and First Security Van Kasper did not examine any individual credit
files.

   The projections furnished to First Security Van Kasper and used by it in
certain of its analyses were prepared by the senior management of each of
Saratoga and SJNB. Neither Saratoga nor SJNB publicly discloses internal
management projections of the type provided to First Security Van Kasper in
connection with its review of the merger. As a result, such projections were
not prepared with a view towards public disclosure. The projections were based
on numerous variables and assumptions which are inherently uncertain, including
factors related to general economic and competitive conditions. ACCORDINGLY,
ACTUAL RESULTS COULD VARY SIGNIFICANTLY FROM THOSE SET FORTH IN THE
PROJECTIONS.

   The following is a summary of the material analyses performed by First
Security Van Kasper related to the oral opinion rendered to Saratoga's board of
directors on August 27, 1999.

   Transaction Summary. First Security Van Kasper calculated the merger
consideration to be paid pursuant to the exchange ratio as a multiple of
Saratoga's book value, actual earnings for the twelve months ended June 30,
1999 and 1999 estimated earnings. This computation was based on Saratoga's
earnings per share of $1.13 for the twelve months ended June 30, 1999 and
Saratoga's estimated earnings per share of $1.26 in 1999, and an exchange ratio
of 0.70 SJNB shares for each Saratoga share. Based on those assumptions and a
closing SJNB stock price of $33.25, this analysis indicated that Saratoga
shareholders would receive shares of SJNB common stock worth $23.275 for each
share of Saratoga common stock held, and that this amount would represent a
multiple of 2.49 times book value per share, 20.60 times earnings for the
twelve months ended June 30, 1999 and 18.47 times estimated 1999 earnings per
share.

   Discounted Cash Flow Analysis. First Security Van Kasper estimated the
present value of future cash flows that would accrue to a holder of a share of
Saratoga common stock assuming that the shareholder held the stock for five
years and then sold it. The analysis was based on earnings forecasts prepared
by Saratoga management on a stand-alone, independent basis for the year 1999
and annual net income growth rates from 10.0% to 15.0% for the years 2000
through 2003. A 16% dividend payout ratio was assumed for Saratoga through the
year 2003. An estimated year 2003 year-end stock price was estimated by
multiplying the projected annual earnings by earnings multiples ranging from 12
to 18 times. The estimated stock price for each year and the estimated
dividends were discounted at rates from 12% to 16%. These rates were selected
because, in First Security Van Kasper's experience, they represent the risk-
adjusted rates of return that investors in securities such as the common stock
of Saratoga would require. On the basis of these assumptions, First Security
Van Kasper calculated a range of present values ranging from $11.34 to $23.50.
These values were compared to the offer from SJNB which, at August 27, 1999,
represented a value of $23.275.

   The discounted cash flow present value analysis is a widely used valuation
methodology that relies on numerous assumptions, including asset and earnings
growth rates, terminal values and discount rates. The analysis did not purport
to be indicative of the actual values or expected values of Saratoga common
stock.

                                       27
<PAGE>

   Selected Transaction Analysis. First Security Van Kasper reviewed certain
financial data related to a set of comparable bank merger transactions with
announced values between $30 million and $50 million since December 31, 1998.

   First Security Van Kasper compared multiples of price to various factors for
the SJNB-Saratoga merger to the same multiples for the comparable group's
mergers at the times those mergers were announced. The results were as follows:

<TABLE>
<CAPTION>
                                                    Multiple of Price to Factor
                                                    ---------------------------
                                                                  SJNB-Saratoga
   Comparable Factor Considered                     Group Average    Merger
   ----------------------------                     ------------- -------------
   <S>                                              <C>           <C>
   Trailing 12 Months Earnings.....................    21.79x        20.60x
   Estimated Tangible Book Value...................     2.34x         2.49x
   Tangible Book Premium to Core Deposits Value....    17.44%        32.53%
</TABLE>

   No company or transaction used as a comparison in the above analysis is
identical to SJNB, Saratoga or the merger. Accordingly, an analysis of these
results is not mathematical. Rather, it involves complex considerations and
judgments concerning differences in financial and operating characteristics of
the companies and other factors that could affect the public trading value of
the companies to which they are being compared.

   Selected Peer Group Analysis. First Security Van Kasper compared the
financial performance and market performance of SJNB to those of a group of
comparable banks and bank holding companies. The companies in the peer group
were Western regional banks that had total assets ranging from $250 million to
$750 million. The comparisons were based on:

  . various financial measures, including:

    (1) earnings performance,

    (2) operating efficiency,

    (3) capital adequacy, and

    (4) asset quality; and

  . various measures of market performance, including:

    (1) market/book values,

    (2) price to earnings, and

    (3) dividend yields.

   To perform this analysis, First Security Van Kasper used the financial
information as of and for the 12 months ended June 30, 1999 and market price
information as of August 27, 1999.

   First Security Van Kasper's analysis showed the following concerning SJNB's
financial performance:

<TABLE>
<CAPTION>
   Performance Measure                                        SJNB    Peer Group
   -------------------                                      --------  ----------
   <S>                                                      <C>       <C>
   Return on Equity........................................    15.60%    12.03%
   Return on Assets........................................     1.50      1.17
   Net Interest Margin.....................................     6.23      4.69
   Efficiency Ratio........................................    54.23     62.11
   Leverage Ratio..........................................     8.09      9.26
   Non-Performing Assets to Total Assets...................     0.10      0.82
   Loan Loss Reserve to Nonperforming Assets............... 1,200.01    276.34
</TABLE>


                                       28
<PAGE>

   First Security Van Kasper's analysis showed the following concerning SJNB's
market performance:

<TABLE>
<CAPTION>
   Performance Measure                                        SJNB  Peer Group
   -------------------                                       ------ ----------
   <S>                                                       <C>    <C>
   Price to Earnings Multiple, based on latest 12 months
    earnings................................................ 15.76x   16.94x
   Price to Earnings Multiple, based on 1999 estimated
    earnings................................................ 14.46x   15.03x
   Price to Tangible Book Value Multiple....................  2.58x    2.00x
   Dividend Yield...........................................  1.68%    2.04%
</TABLE>

   For purposes of the above calculations, all earnings estimates are based
upon the First Security Van Kasper estimates for SJNB.

   Contribution Analysis. First Security Van Kasper analyzed the relative
contribution of each of SJNB and Saratoga to certain pro forma balance sheet
and income statement items of the combined entity. The contribution analysis
showed:

<TABLE>
   <S>                                                                    <C>
   Saratoga Contribution To:
     Combined Common Equity.............................................. 33.09%
     Combined 1999 Estimated Net Income without Cost Savings............. 28.32
     Combined Total Assets............................................... 26.90
   Saratoga Estimated Pro Forma Ownership................................ 35.23
</TABLE>

   First Security Van Kasper compared the relative contribution of the balance
sheet and income statement items with the estimated pro forma ownership for
Saratoga shareholders based on an exchange ratio of 0.70.

   Other Analyses and Opinion Update. First Security Van Kasper reviewed the
relative financial and market performance of Saratoga and SJNB to a variety of
relevant industry peer groups and indices. First Security Van Kasper also
reviewed earnings estimates, balance sheet composition, historical stock
performance and other financial data for SJNB.

   In connection with its opinion dated as of the date of this joint proxy
statement/prospectus, First Security Van Kasper performed procedures to update,
as necessary, certain of the analyses described above. First Security Van
Kasper considered, among other things, the financial results of Saratoga and
SJNB for the quarter ended September 30, 1999. First Security Van Kasper also
reviewed the assumptions on which the analyses described above were based and
the factors considered in connection therewith. First Security Van Kasper did
not perform any analyses in addition to those described above in updating its
August 27, 1999 oral opinion.

   First Security Van Kasper. The Saratoga board of directors has retained
First Security Van Kasper as an independent contractor to act as financial
adviser to Saratoga regarding the merger. As part of its investment banking
business, First Security Van Kasper is continually engaged in the valuation of
banking businesses and their securities in connection with mergers and
acquisitions, negotiated underwritings, competitive biddings, secondary
distributions of listed and unlisted securities, private placements and
valuations for estate, corporate and other purposes. First Security Van Kasper
has experience in, and knowledge of, the valuation of banking enterprises. In
the ordinary course of its business as a broker-dealer, First Security Van
Kasper may, from time to time, purchase securities from, and sell securities
to, Saratoga and SJNB. As a market maker in securities, First Security Van
Kasper may from time to time have a long or short position in, and buy or sell,
debt or equity securities of Saratoga and SJNB for First Security Van Kasper's
own account and for the accounts of its customers.

   Saratoga and First Security Van Kasper have entered into an agreement
relating to the services to be provided by First Security Van Kasper in
connection with the merger. Saratoga has agreed to pay First Security Van
Kasper (1) $50,000 payable on the announcement by Saratoga of a definitive
agreement to enter into a combination transaction; and (2) an additional fee
equal to 1.40% of the aggregate consideration offered in exchange for the
outstanding shares of common stock of Saratoga in the merger, payable at the
time of closing. Pursuant to the First Security Van Kasper engagement
agreement, Saratoga also agreed to reimburse First

                                       29
<PAGE>

Security Van Kasper for reasonable out-of-pocket expenses and disbursements
incurred in connection with its retention and to indemnify First Security Van
Kasper against certain liabilities, including liabilities under the federal
securities laws.

Opinion of SJNB's Financial Advisor

   By letter agreement dated as of September 20, 1999, SJNB retained Sandler
O'Neill & Partners, L.P. ("Sandler O'Neill") as an independent financial
advisor to render an opinion as to the fairness, from a financial point of
view, of the exchange ratio to the shareholders of SJNB. Sandler O'Neill is a
nationally recognized investment banking firm whose principal business
specialty is financial institutions. In the ordinary course of its investment
banking business, Sandler O'Neill is regularly engaged in the valuation of
financial institutions and their securities in connection with mergers and
acquisitions and other corporate transactions. Sandler O'Neill did not act as
SJNB's financial advisor in connection with its determination to engage in the
merger and did not participate in the negotiation of the exchange ratio or the
merger agreement.

   Sandler O'Neill has delivered to the SJNB board its written opinion, dated
as of October 22, 1999, that as of such date, the exchange ratio was fair to
the shareholders of SJNB from a financial point of view. The full text of
Sandler O'Neill's opinion is attached as Annex D to this joint proxy
statement/prospectus. The opinion outlines the procedures followed, assumptions
made, matters considered and qualifications and limitations on the review
undertaken by Sandler O'Neill in rendering the opinion. The opinion is
incorporated by reference into this description and this description is
qualified in its entirety by reference to the opinion. SJNB shareholders are
urged to read the opinion carefully in connection with their consideration of
the proposed merger.

   Sandler O'Neill's opinion was directed to the SJNB board for its information
and is directed only to the fairness, from a financial point of view, of the
exchange ratio to the shareholders of SJNB. It does not address the underlying
business decision of SJNB to engage in the merger or any other aspect of the
merger and is not a recommendation to any SJNB shareholder as to how such
shareholder should vote at the special meeting with respect to the merger or
any other related matter.

   In rendering its opinion, Sandler O'Neill performed a variety of financial
analyses. The following is a summary of the material analyses performed by
Sandler O'Neill, but is not a complete description of all the analyses
underlying Sandler O'Neill's opinion. The preparation of a fairness opinion is
a complex process involving subjective judgments as to the most appropriate and
relevant methods of financial analysis and the application of those methods to
the particular circumstances. The process, therefore, is not necessarily
susceptible to a partial analysis or summary description. Sandler O'Neill
believes that its analyses must be considered as a whole and that selecting
only certain factors and analyses, or attempting to ascribe relative weights to
some or all factors and analyses, could create an incomplete view of the
evaluation process underlying its opinion. Also, no company included in Sandler
O'Neill's comparative analyses described below is identical to SJNB or Saratoga
and no transaction is identical to the merger. Accordingly, an analysis of
comparable companies or transactions is not mathematical; rather, it involves
complex considerations and judgments concerning differences in financial and
operating characteristics of the companies and other factors that could affect
the public trading values or merger transaction values, as the case may be, of
SJNB and Saratoga and the companies to which they are being compared.

   The earnings projections for SJNB and Saratoga relied upon by Sandler
O'Neill in its analyses were reviewed with management and were based upon
internal projections of SJNB and Saratoga for the years ending December 31,
1999 and 2000. Based on discussions with SJNB management, for periods after
2000 Sandler O'Neill assumed an annual growth rate on earning assets of
approximately 13% for SJNB and approximately 16% for Saratoga. The 1999 and
2000 earnings projections furnished to Sandler O'Neill were prepared by the
senior managements of SJNB and Saratoga for internal purposes only and not with
a view towards public disclosure. Those projections were based on numerous
variables and assumptions which are inherently uncertain and, accordingly,
actual results could vary materially from those set forth in such projections.


                                       30
<PAGE>

   In performing its analyses, Sandler O'Neill also made numerous assumptions
with respect to industry performance, business and economic conditions and
various other matters, many of which cannot be predicted and are beyond the
control of SJNB, Saratoga and Sandler O'Neill. The analyses performed by
Sandler O'Neill are not necessarily indicative of actual values or future
results, which may be significantly more or less favorable than suggested by
such analyses. Sandler O'Neill prepared its analyses solely for purposes of
rendering its opinion and provided such analyses to the SJNB board. Estimates
on the values of companies do not purport to be appraisals or necessarily
reflect the prices at which companies or their securities may actually be sold.
Such estimates are inherently subject to uncertainty and actual values may be
materially different. Accordingly, Sandler O'Neill's analyses do not
necessarily reflect the value of SJNB common stock or Saratoga common stock or
the prices at which SJNB common stock or Saratoga common stock may be sold at
any time.

   Summary of Proposal. Sandler O'Neill reviewed the financial terms of the
proposed transaction. Based upon the closing price of SJNB common stock on
August 27, 1999, Sandler O'Neill calculated an implied transaction value per
share of Saratoga common stock of $23.28. The implied aggregate transaction
value was approximately $42.3 million, based upon 1,818,047 fully diluted
shares of Saratoga common stock outstanding, which was determined using the
treasury stock method at the implied value of $23.28. Based upon Saratoga's
June 30, 1999 financial information and the implied transaction value of $23.28
per share, Sandler O'Neill calculated the following ratios:

<TABLE>
   <S>                                                                     <C>
   Implied value/Book value............................................... 2.49x
   Implied value/Tangible book value...................................... 2.49x
   Implied value/Last twelve months' EPS.................................. 20.6x
   Implied value/Projected 1999 EPS....................................... 20.0x
   Implied value/Projected 2000 EPS....................................... 19.1x
</TABLE>

   For purposes of Sandler O'Neill's analyses, earnings per share were based on
fully diluted earnings per share. Sandler O'Neill noted that the implied
transaction value represented a 22.5% premium over the August 27, 1999 closing
price of Saratoga common stock of $19.00.

   Stock Trading History. Sandler O'Neill reviewed the history of the reported
trading prices and volume of SJNB common stock and Saratoga common stock, and
the relationship between the movements in the prices of SJNB common stock and
Saratoga common stock, respectively, to movements in certain stock indices,
including the Standard & Poor's 500 Index, the NASDAQ Bank Index and the median
performance of a composite group of publicly traded regional commercial banks
selected by Sandler O'Neill and listed below. During the one year period ended
October 20, 1999, the SJNB common stock outperformed the NASDAQ Bank Index and
the composite group while underperforming the Standard & Poor's 500 Index.
During the one year period ended August 27, 1999, the Saratoga common stock
outperformed the NASDAQ Bank Index and the composite group while
underperforming the Standard & Poor's 500 Index.

   Comparable Company Analysis. Sandler O'Neill used publicly available
information to compare selected financial and market trading information for
SJNB and two groups of commercial banks selected by Sandler O'Neill. The
Regional Group consisted of SJNB and the following 12 publicly traded regional
commercial banks:

<TABLE>
     <S>                                    <C>
     Bank of the Sierra                     BYL Bancorp
     Cascade Bancorp                        City Bank
     Civic BanCorp                          Columbia Bancorp
     Foothill Independent Bancorp           Heritage Commerce Corp.
     Northern Empire Bancshares             Northrim Bank
     Redwood Empire Bancorp                 United Security Bancorp.
</TABLE>

                                       31
<PAGE>

   The Highly Valued Group consisted of the following 10 publicly traded
commercial banks that had a return on average equity (based on last twelve
months' earnings) of greater than 16% and a price to tangible book value of
greater than 230%:

<TABLE>
     <S>                                    <C>
     Boston Private Financial               Bryn Mawr Bank Corp.
     Camden National Corp.                  Cascade Bancorp
     City Bank                              Coast Bancorp
     Community West Bancshares              S.Y. Bancorp Inc.
     Summit Bancshares Inc.                 Tompkins Trustco Inc.
</TABLE>

   The analysis compared publicly available financial information for SJNB and
the median data for each of the Regional and Highly Valued Groups as of and for
each of the years ended December 31, 1994 through 1998 and as of and for the
twelve months ended June 30, 1999. The table below sets forth the comparative
data as of and for the twelve months ended June 30, 1999.

<TABLE>
<CAPTION>
                                                                    Highly
                                                         Regional   Valued
                                                 SJNB      Group     Group
                                               --------  --------  --------
   <S>                                         <C>       <C>       <C>       <C>
   Total assets............................... $403,640  $403,640  $506,369
   Annual growth rate of total assets.........    17.81%    17.81%    15.80%
   Tangible equity/total assets...............     7.49%     8.10%     8.40%
   Intangible assets/total equity.............    11.28%     2.28%     1.50%
   Net loans/total assets.....................    72.35%    72.35%    67.89%
   Cash & securities/total assets.............    24.15%    22.12%    26.91%
   Gross loans/total deposits.................    89.68%    86.77%    88.69%
   Total borrowings/total assets..............     8.05%     2.53%     6.03%
   Non-performing assets/total assets.........      .10%      .48%      .57%
   Loan loss reserve/gross loans..............     1.66%     1.56%     1.40%
   Net interest margin........................     6.23%     6.23%     5.59%
   Loan loss provision/average assets.........     0.11%      .36%      .23%   .
   Non-interest income/average assets.........     0.29%     1.04%     1.97%
   Non-interest expense/average assets........     3.44%     4.18%     3.90%
   Efficiency ratio...........................    54.23%    58.15%    53.62%
   Return on average assets...................     1.50%     1.47%     1.74%
   Return on average equity...................    15.60%    15.22%    18.73%
   Price/tangible book value per share........      238%      216%      277%
   Price/earnings per share...................    14.51x    13.07x    15.30x
   Dividend yield.............................     1.83%     1.83%     1.56%
   Dividend payout ratio......................    26.54%    17.01%    23.55%
</TABLE>

   Similarly, Sandler O'Neill used publicly available information to compare
selected financial and market trading information for Saratoga and two groups
of commercial banks listed below. The Regional Group consisted of Saratoga and
the following 13 publicly traded regional commercial banks:

<TABLE>
     <S>                                    <C>
     Clovis Community Bank                  Community Bancorp Inc.
     Cowlitz Bancorp.                       EvergreenBank
     First American Bank                    First Coastal Bancshares
     First Financial Bancorp                Heritage Oaks Bancorp
     National Mercantile Bancorp            Northwest Bancorp.
     Sonoma Valley Bank                     Vineyard National Bancorp
     West Coast Bancorp
</TABLE>


                                       32
<PAGE>

   The Highly Valued Group consisted of the following seven publicly traded
commercial banks that had a return on average equity (based on last twelve
months' earnings) of greater than 16% and a price to tangible book value of
greater than 190%:

<TABLE>
     <S>                                    <C>
     Borel Bank & Trust Co.                 Bridge View Bancorp
     BWC Financial Corp.                    C&F Financial Corp.
     Coast Bancorp                          Community West Bancshares
     Resource Bankshares Corp.
</TABLE>

   The analysis compared publicly available financial information for Saratoga
and the median data for each of the Regional and Highly Valued Groups as of and
for each of the years ended December 31, 1994 through 1998 and as of and for
the twelve months ended June 30, 1999. The table below sets forth the
comparative data as of and for the twelve months ended June 30, 1999.

<TABLE>
<CAPTION>
                                                                        Highly
                                                             Regional   Valued
                                                   Saratoga    Group     Group
                                                   --------  --------  --------
   <S>                                             <C>       <C>       <C>
   Total assets................................... $148,558  $148,558  $288,290
   Annual growth rate of total assets.............    13.34%     8.83%    13.32%
   Tangible equity/total assets...................    10.00%     7.63%     9.58%
   Intangible assets/total equity.................      .00%      .00%      .00%
   Net loans/total assets.........................    45.95%    57.94%    66.97%
   Cash & securities/total assets.................    46.58%    38.61%    30.70%
   Gross loans/total deposits.....................    63.01%    71.16%    76.59%
   Total borrowings/total assets..................    15.22%     2.62%      .14%
   Non-performing assets/total assets.............      .00%      .69%      .22%
   Loan loss reserve/gross loans..................     1.20%     1.52%     1.35%
   Net interest margin............................     4.18%     5.68%     5.49%
   Loan loss provision/average assets.............      .07%      .15%      .10%
   Non-interest income/average assets.............      .53%     1.09%     1.68%
   Non-interest expense/average assets............     2.24%     4.86%     4.51%
   Efficiency ratio...............................    51.22%    77.61%    58.05%
   Return on average assets.......................     1.43%      .83%     1.71%
   Return on average equity.......................    13.65%     9.31%    19.09%
   Price/tangible book value per share............      215%      146%      233%
   Price/earnings per share.......................    17.65x    15.13x    13.57x
   Dividend yield.................................      .99%      .00%     1.58%
   Dividend payout ratio..........................    17.70%      .00%    23.62%
</TABLE>

   Analysis of Selected Merger Transactions. Sandler O'Neill reviewed certain
other transactions announced from January 1, 1999 to September 30, 1999
involving commercial banks as acquired institutions with transaction values
greater than $15 million. Sandler O'Neill reviewed 110 transactions announced
nationwide and 22 transactions in California. Sandler O'Neill reviewed the
ratios of transaction value to last four quarters' earnings, transaction value
to book value, transaction value to tangible book value, tangible book premium
to core deposits, transaction value to total assets and premium to current
market and computed high, low, mean and median ratios and premiums for the
respective groups of transactions. These multiples were applied to Saratoga's
financial information as of and for the twelve months ended June 30, 1999. As
illustrated in the following table, Sandler O'Neill derived an imputed range of
values per share of Saratoga common stock of $17.37 to $27.80 based upon the
median multiples for nationwide transactions and $15.80 to $27.98 based upon
the median multiples for California transactions.


                                       33
<PAGE>

<TABLE>
<CAPTION>
                                                 Nationwide       California
                                                Transactions     Transactions
                                              ---------------- ----------------
                                               Median  Implied  Median  Implied
                                              Multiple  Value  Multiple  Value
                                              -------- ------- -------- -------
   <S>                                        <C>      <C>     <C>      <C>
   Deal price/LTM EPS........................   21.5x  $24.20    21.1x  $23.81
   Deal price/Book value.....................   2.67x   24.96    2.55x   23.88
   Deal price/Tangible book value............   2.88x   26.97    2.58x   24.12
   Tangible book premium/Core deposits.......   22.0%   20.79    20.8%   20.13
   Deal price/Total assets...................   23.8%   19.51    23.4%   19.13
   Deal price/Total deposits.................   28.8%   17.37    26.2%   15.80
   Premium to market.........................   39.9%   27.80    40.8%   27.98
</TABLE>

   Discounted Dividend Stream and Terminal Value Analysis. Sandler O'Neill also
performed an analysis which estimated the future stream of after-tax dividend
flows of Saratoga through December 31, 2003 under various circumstances,
assuming Saratoga's current dividend payout ratio and that Saratoga performed
in accordance with the earnings forecasts reviewed with management. To
approximate the terminal value of Saratoga common stock at December 31, 2003,
Sandler O'Neill applied price/earnings multiples ranging from 10x to 26x and
applied multiples of tangible book value ranging from 100% to 350%. The
dividend income streams and terminal values were then discounted to present
values using different discount rates ranging from 9% to 15% chosen to reflect
different assumptions regarding required rates of return of holders or
prospective buyers of Saratoga common stock. As illustrated in the following
table, this analysis indicated an imputed range of values per share of Saratoga
common stock of $10.51 to $34.46 when applying the price/earnings multiples and
$8.78 to $37.55 when applying multiples of tangible book value.

<TABLE>
<CAPTION>
                              Price/Earnings                          Tangible Book Value
                                Multiples                                  Multiples
                          ------------------------------------        ----------------------------------
   Discount Rate            10x                   26x                  1.0x                 3.5x
   -------------          -------               -------               ------               ------
   <S>                    <C>                   <C>                   <C>                  <C>
         9%               $ 13.83               $ 34.46               $11.51               $37.55
        11                  12.60                 31.35                10.50                34.16
        13                  11.50                 28.57                 9.59                31.14
        15                  10.51                 26.08                 8.78                28.43
</TABLE>

   In connection with its analysis, Sandler O'Neill considered how the present
value analysis would be affected by changes in the underlying assumptions,
including variations with respect to the growth rate of assets, net interest
spread, non-interest income, non-interest expenses and dividend payout ratio.
Sandler O'Neill noted that the discounted dividend stream and terminal value
analysis is a widely used valuation methodology, but the results of such
methodology are highly dependent upon numerous assumptions that must be made,
and the results thereof are not necessarily indicative of actual values or
future results.

   Pro Forma Merger Analysis. Sandler O'Neill analyzed certain potential pro
forma effects of the merger on SJNB, based upon the exchange ratio of 0.70,
SJNB's and Saratoga's current and projected income statements and balance
sheets, and assumptions regarding the economic environment, accounting and tax
treatment of the merger, charges associated with the merger, operating
efficiencies and other adjustments discussed with the senior management of SJNB
and Saratoga. Sandler O'Neill's analysis did not include the potential impact
of any earnings enhancements resulting from the merger. As illustrated in the
following table, this analysis indicated that the merger would be dilutive to
SJNB's projected earnings per share and tangible book value per share for the
year ending December 31, 2000. The actual results achieved by SJNB may vary
from projected results and the variations may be material.

<TABLE>
<CAPTION>
   Year ending December 31, 2000                           Stand-alone Pro Forma
   -----------------------------                           ----------- ---------
   <S>                                                     <C>         <C>
   Projected EPS..........................................   $ 2.83     $ 2.75
   Projected tangible book value..........................    13.90      13.17
   Projected dividend.....................................      .65        .65
   Projected tangible equity/assets ratio.................     8.25%      8.47%
</TABLE>

                                       34
<PAGE>

   Based on discussions with management, SJNB believes that the potential
earnings dilution may be offset by, among other things: (1) an enhanced legal
lending limit which will allow SJNB to enhance existing Saratoga lending
relationships and allow the company to compete for larger relationships; (2)
the ability to cross-sell products through the implementation of business
development officers at Saratoga branch locations; (3) reduction in funding
costs for the combined company through expansion of the Saratoga retail deposit
base; (4) the ability to offer core banking and retail banking services to
existing customers of SJNB; and (5) better service to existing SJNB customers
and potential deposit generation on the west side of San Jose provided by the
two new offices acquired as a result of the transaction. However, there can be
no assurance as to when or if such earnings enhancements will be achieved.

   Contribution Analysis. Sandler O'Neill reviewed the relative contributions
to be made by SJNB and Saratoga to the combined institution based on data at
and for the twelve months ended September 30, 1999. This analysis indicated
that the implied contributions to the combined entity were as follows:

<TABLE>
<CAPTION>
                                                                 SJNB   Saratoga
                                                                 -----  --------
   <S>                                                           <C>    <C>
   Total assets.................................................  72.9%   27.1%
   Total net loans..............................................  82.3    17.7
   Goodwill..................................................... 100.0     0.0
   Total deposits...............................................  75.0    25.0
   Total borrowings.............................................  56.3    43.7
   Tangible equity..............................................  67.5    32.5
   Total equity.................................................  69.9    30.1
   LTM net income...............................................  71.9    28.1
   LQA net income...............................................  72.4    27.6
   Percentage of pro forma shares owned(1) .....................  66.8    33.2
</TABLE>
- --------
(1) Determined using an exchange ratio of 0.70.

   In connection with rendering its opinion, Sandler O'Neill reviewed, among
other things: (1) the merger agreement and exhibits thereto; (2) the Stock
Option Agreement, dated August 27, 1999, between SJNB and Saratoga; (3) certain
publicly available financial statements of SJNB and other historical financial
information provided by SJNB that they deemed relevant; (4) certain publicly
available financial statements of Saratoga and other historical financial
information provided by Saratoga that they deemed relevant; (5) certain
internal financial analyses and forecasts of SJNB prepared by and reviewed with
management of SJNB and the views of senior management of SJNB, based on certain
limited discussions with certain members of senior management, regarding SJNB's
past and current business, financial condition, results of operations and
future prospects; (6) certain internal financial analyses and forecasts of
Saratoga prepared by and reviewed with management of Saratoga and the views of
senior management of Saratoga, based on certain limited discussions with
certain members of senior management, regarding Saratoga's past and current
business, financial condition, results of operations and future prospects; (7)
the pro forma impact of the merger on SJNB; (8) the publicly reported
historical price and trading activity for SJNB's and Saratoga's common stock,
including a comparison of certain financial and stock market information for
SJNB and Saratoga with similar publicly available information for certain other
companies the securities of which are publicly traded; (9) the financial terms
of recent business combinations in the commercial banking industry, to the
extent publicly available; (10) the current market environment generally and
the banking environment in particular; and (11) such other information,
financial studies, analyses and investigations and financial, economic and
market criteria as they considered relevant.

   In performing its reviews and analyses, Sandler O'Neill assumed and relied
upon the accuracy and completeness of all the financial information, analyses
and other information that was publicly available or otherwise furnished to,
reviewed by or discussed with it, and Sandler O'Neill did not assume any
responsibility or liability for independently verifying the accuracy or
completeness of any of such information. Sandler O'Neill did not make an
independent evaluation or appraisal of the assets, the collateral securing
assets or the

                                       35
<PAGE>

liabilities, contingent or otherwise, of SJNB or Saratoga or any of their
respective subsidiaries, or the collectibility of any such assets, nor was it
furnished with any such evaluations or appraisals. Sandler O'Neill is not an
expert in the evaluation of allowances for loan losses and it has not made an
independent evaluation of the adequacy of the allowance for loan losses of SJNB
or Saratoga, nor has it reviewed any individual credit files relating to SJNB
or Saratoga. With SJNB's consent, Sandler O'Neill has assumed that the
respective allowances for loan losses for both SJNB and Saratoga are adequate
to cover such losses and will be adequate on a pro forma basis for the combined
entity. In addition, Sandler O'Neill has not conducted any physical inspection
of the properties or facilities of SJNB or Saratoga. With respect to all
financial projections reviewed with each company's management and used by
Sandler O'Neill in its analyses, Sandler O'Neill assumed that they reflected
the best currently available estimates and judgments of the respective
managements of the respective future financial performances of SJNB and
Saratoga and that such performances will be achieved. Sandler O'Neill expressed
no opinion as to such financial projections or the assumptions on which they
were based.

   Sandler O'Neill's opinion was necessarily based upon market, economic and
other conditions as they existed on, and could be evaluated as of, the date of
its opinion. Sandler O'Neill assumed, in all respects material to its analysis,
that all of the representations and warranties contained in the merger
agreement and all related agreements are true and correct, that each party to
such agreements will perform all of the covenants required to be performed by
such party under such agreements and that the conditions precedent in the
merger agreement are not waived. Sandler O'Neill also assumed, with SJNB's
consent, that there has been no material change in SJNB's or Saratoga's assets,
financial condition, results of operations, business or prospects since the
date of the last publicly filed financial statements available to them, that
SJNB and Saratoga will remain as going concerns for all periods relevant to its
analyses, and that the merger will be accounted for as a pooling of interests
and will qualify as a tax-free reorganization for federal income tax purposes.

   SJNB has agreed to pay Sandler O'Neill a fee of $50,000 for rendering its
opinion. SJNB has also agreed to reimburse Sandler O'Neill for its reasonable
out-of-pocket expenses incurred in connection with its engagement and to
indemnify Sandler O'Neill and its affiliates and their respective partners,
directors, officers, employees, agents, and controlling persons against certain
expenses and liabilities, including liabilities under securities laws. In the
ordinary course of its business as a broker-dealer, Sandler O'Neill may also
purchase securities from and sell securities to SJNB and Saratoga and may
actively trade the equity or debt securities of SJNB and Saratoga and their
respective affiliates for its own account and for the accounts of customers
and, accordingly, may at any time hold a long or short position in such
securities.

Effective Date and Time of the Merger

   The merger agreement provides that the merger will be effective upon the
date of the filing with the California Secretary of State of a duly executed
agreement of merger and officers' certificates prescribed by Section 1103 of
the California General Corporation Law, or at such time thereafter as is
provided by mutual agreement in the merger agreement. The date and time on
which the merger is effective as specified in the merger agreement is referred
to in this document as the effective date and effective time, respectively.
Although the parties have not adopted any formal timetable, it is presently
anticipated that the merger will be consummated during December 1999 or January
2000, assuming all of the conditions set forth in the merger agreement are
theretofore satisfied or waived.


                                       36
<PAGE>

Purchase Price and Potential Adjustments

   Each share of Saratoga common stock issued and outstanding prior to the
effective time (other than shares as to which dissenters' rights have been
perfected) shall be converted into the right to receive 0.70 of a share of SJNB
common stock, plus cash in lieu of fractional shares. The exchange ratio is
subject to adjustment under the following circumstances:

  . If SJNB changes (or establishes a record date for changing) the number of
    shares of SJNB common stock outstanding prior to the effective time as a
    result of an issuance of shares, recapitalization, merger, stock split,
    stock dividend or similar transaction, the exchange ratio will be
    proportionately adjusted to eliminate the effect of such event;

  . If, prior to the effective time, SJNB issues, sells or distributes a
    warrant, option or other instrument convertible into or exchangeable for
    any shares of SJNB common stock (collectively, "SJNB Instruments"), then
    (1) the exchange ratio will be proportionately adjusted to eliminate the
    effect of such event or (2) in the sole discretion of SJNB, SJNB will
    provide to holders of Saratoga common stock proportionately equivalent
    SJNB Instruments upon consummation of the merger; and

  . If Saratoga exercises its option to terminate the merger agreement
    because the average closing price of SJNB common stock for the 20 trading
    days ending five business days before the closing of the merger is less
    than $29.3590. In such case, during the five business day period
    beginning on the day after receipt of notice of election by Saratoga to
    terminate under this provision, SJNB may elect to adjust the exchange
    ratio of 0.70 to a number equal to the quotient of (1) 29.3590 times the
    exchange ratio, divided by (2) the average SJNB closing price.

   No such adjustments to the exchange ratio will take place (1) in connection
with the grant of options under SJNB's stock plan or with respect to a takeover
proposal to which SJNB is a party or (2) in the event that SJNB takes any
action to authorize, approve or adopt a shareholder rights plan as permitted by
the merger agreement.

Conversion of Shares of Saratoga Common Stock

   At the effective time, by virtue of the merger and without any action on the
part of the holders of Saratoga common stock, each issued and outstanding share
of Saratoga common stock (other than dissenting and fractional shares) will be
converted into the right to receive the per share consideration of SJNB common
stock as discussed above. See "--Purchase Price and Potential Adjustments." All
such shares of Saratoga common stock shall no longer be outstanding and shall
automatically be canceled and retired and shall cease to exist, and each
certificate previously representing any such shares shall thereafter represent
the shares of SJNB common stock into which such shares of Saratoga common stock
have been converted. Certificates previously representing shares of Saratoga
common stock shall be exchanged for certificates representing whole shares of
SJNB common stock issued in consideration therefor upon the surrender of such
certificates. Cash will be paid in lieu of any fractional share of SJNB common
stock. See "--Exchange of Saratoga Stock Certificates; Fractional Interests."
From and after the effective date, the holders of certificates formerly
representing shares of Saratoga common stock shall cease to have any rights
with respect such shares.

Exchange of Saratoga Stock Certificates; Fractional Interests

   Prior to the effective date, SJNB has agreed to appoint U.S. Stock Transfer
Corporation, or its successor, as exchange agent (the "Exchange Agent") for the
purpose of exchanging certificates representing shares of SJNB common stock,
and at and after the effective date, SJNB will issue and deliver to the
Exchange Agent certificates representing the shares of SJNB common stock to be
delivered to holders of shares of Saratoga common stock. As soon as practicable
after the effective date, each holder of shares of Saratoga common stock, upon
surrender to the exchange agent of one or more certificates for such shares of
Saratoga common stock for cancellation, will be entitled to receive a
certificate representing the number of shares of SJNB common stock

                                       37
<PAGE>

into which such number of shares of Saratoga common stock will have been
converted and a payment in cash with respect to fractional shares, if any.

   No dividends or other distributions of any kind which are declared payable
to shareholders of record of the shares of SJNB common stock after the
effective date will be paid to persons entitled to receive such certificates
for shares of SJNB common stock until such persons surrender their certificates
representing shares of Saratoga common stock. Upon surrender of certificates
representing shares of Saratoga common stock, the holder thereof will be paid,
without interest, any dividends or other distributions with respect to the
shares of SJNB common stock as to which the record date and payment date
occurred on or after the effective date and on or before the date of surrender.

   If any certificate for shares of SJNB common stock is to be issued in a name
other than that in which the certificate for shares of Saratoga common stock
surrendered in exchange therefor is registered, it will be a condition of such
exchange that the person requesting such exchange will pay to the Exchange
Agent any transfer costs, taxes or other expenses required by reason of the
issuance of certificates for such shares of SJNB common stock in a name other
than the registered holder of the certificate surrendered, or such persons will
establish to the satisfaction of SJNB and the Exchange Agent that such costs,
taxes or other expenses have been paid or are not applicable.

   All dividends or distributions, and any cash to be paid in lieu of
fractional shares, if held by the Exchange Agent for payment or delivery to the
holders of unsurrendered certificates representing shares of Saratoga common
stock and unclaimed at the end of one year from the effective date, will
(together with any interest earned thereon) at such time be paid or redelivered
by the Exchange Agent to SJNB, and after such time any holder of a certificate
representing shares of Saratoga common stock who has not surrendered such
certificate to the Exchange Agent will, subject to applicable law, look as a
general creditor only to SJNB for payment or delivery of such shares of SJNB
common stock and dividends or distributions or cash, as the case may be.

   No fractional shares of SJNB common stock will be issued to holders of
shares of Saratoga common stock. In lieu thereof, each such holder entitled to
a fraction of a share of SJNB common stock will receive, at the time of
surrender of the certificate or certificates representing such holder's shares
of Saratoga common stock, an amount in cash equal to the average price of SJNB
common stock multiplied by the fraction of a share of SJNB common stock to
which such holder otherwise would be entitled. The average price of SJNB common
stock is calculated using the closing price of the SJNB common stock for the 20
trading days ending five business days before the closing. No such holder will
be entitled to dividends, voting rights, interest on the value of, or any other
rights in respect of, a fractional share.

Treatment of Stock Options

   At the effective time, the obligations under the Saratoga stock option plan
will be assumed by SJNB. At the effective time, options to purchase shares of
Saratoga common stock issued pursuant to Saratoga's stock option plan that are
outstanding will be converted, without any action on the part of the holders
thereof, into options to acquire the number of shares of SJNB common stock the
option holder would have received pursuant to the merger if he or she had
exercised all of his or her options immediately prior to the effective date.
The option exercise price will be adjusted to equal the exercise price per
share for the options immediately prior to the merger divided by the exchange
ratio of 0.70, as the exchange ratio may be adjusted. Except as noted above,
each Saratoga stock option will otherwise continue on terms and conditions that
are consistent with those that were applicable on the effective date.

Interests of Saratoga Officers and Directors in the Merger

   Saratoga directors and executive officers have interests in the merger in
addition to their interests as Saratoga shareholders. The Saratoga board of
directors was aware of these interests and considered them, among other
matters, in approving the merger agreement. See "Introduction--Share Ownership
of Management."


                                       38
<PAGE>

   The directors and executive officers of Saratoga and three other Saratoga
National Bank officer employees have Supplemental Compensation Agreements which
provide lifetime annual income benefits to the respective participants and
certain benefits upon retirement (age 62 or older) or early retirement (prior
to attaining age 62), upon death or disability prior to retirement, or in the
event employment or service is terminated prior to retirement. Upon a change in
control of Saratoga or Saratoga National Bank, all of the benefits are fully
vested. Based upon current projections, the annual benefit entitlement for Mr.
Mount, Mr. Lanna and Ms. Rourke is approximately $82,000, $58,000 and $57,000,
respectively, and the average annual benefit amount for non-employee directors
is approximately $13,323.

   Mr. Mount has certain additional benefits consisting of (1) an Employment
Agreement with Saratoga National Bank that provides for severance payments by
Saratoga National Bank or its successor in the event of a change in control of
Saratoga or Saratoga National Bank; (2) an Executive Benefits Agreement with
Saratoga National Bank which provides certain insurance funded payments and a
death benefit; (3) the right pursuant to the merger agreement to receive
payments in the amount of $14,000 per month for a period not to exceed six
months following the consummation of the merger in consideration for providing
transition services to SJNB; and (4) payment of $16,154 as the accrued balance
of a sabbatical plan. Under the Employment Agreement, Mr. Mount is entitled to
receive severance payments equal to one and one-half times the average of his
last five years' compensation, payable in thirty-six substantially equal
installments upon the occurrence of certain termination events or other changes
in his employment following a change in control. The severance amount payable
to Mr. Mount under the Employment Agreement is a variable amount ranging from
approximately $288,881 to $317,453, depending upon whether the merger is
consummated as anticipated in December 1999 or thereafter. In connection with
the Employee Benefits Agreement, Saratoga National Bank or its successor will
distribute to Mr. Mount $70,137 annually over a five-year term, which amounts
represent his deferred bonus under a pre-existing Chief Executive Officer
Incentive Compensation Plan terminated in 1999. Each year during the five-year
term, Mr. Mount will contribute the after-tax balance of each $70,137
installment, and Saratoga National Bank, or its successor, will contribute
approximately $28,058, as premium contributions to purchase an insurance policy
which provides lifetime and death benefits under the Employee Benefits
Agreement. Mr. Mount is entitled to receive lifetime benefit payments through
withdrawals and/or loans of the insurance policy cash surrender value to the
extent of his ownership interest on or after his termination of employment, and
Saratoga National Bank or its successor has an ownership interest in a portion
of the cash surrender value equal to the amount of its premium contributions. A
death benefit is payable to Saratoga National Bank or its successor upon Mr.
Mount's death equal to the total of its premium contributions plus interest
accrued with the balance of the death benefit payable to Mr. Mount's
beneficiary. The amount of lifetime benefit payments and death benefit payments
is uncertain and cannot be calculated since they are entirely dependent upon
the cash surrender value returns of the insurance policy. Cash surrender value
returns are based upon future performance of the insurance policy and will be
affected by various factors, including general economic conditions and the
timing and amounts of any withdrawals and/or loans.

   Ms. Rourke and Mr. Lanna also participate in the Officer Severance Policy
adopted by Saratoga and Saratoga National Bank for certain of their respective
officers. Participants are entitled to receive severance payments upon
termination of employment within one year following a change in control based
upon their respective compensation levels (as defined in the policy) multiplied
by the product of two weeks for each full year of service (in the case of
senior vice presidents and vice presidents) and one and one-half weeks for each
full year of service (in the case of assistant vice presidents). The severance
payable to Ms. Rourke and Mr. Lanna under the policy is approximately $34,726
and $39,266, respectively.

Conduct of Business Pending the Merger

   Under the merger agreement, SJNB and Saratoga have each agreed that, during
the period from the date of the merger agreement to the effective time of the
merger, it and each of its respective subsidiaries will:

  . carry on its business in the usual, regular and ordinary course in
    substantially the same manner as conducted prior to the execution of the
    merger agreement and use all reasonable efforts to preserve intact its
    present business organizations,


                                       39
<PAGE>

  . maintain the rights and franchises of its business, and preserve the
    relationships with its customers, suppliers and others having business
    dealings with it to the end that its goodwill and ongoing businesses will
    not be impaired in any material respect at the effective time of the
    merger,

  . not declare or pay any dividends on or make other distributions in
    respect of any of its capital stock, except (1) (A) in the case of
    Saratoga, cash dividends in an amount per share not greater than, and
    consistent with the manner and frequency of, dividends paid by Saratoga,
    in the 12 months prior to the date of the merger agreement, and (B) in
    the case of SJNB, cash dividends in an amount substantially equivalent to
    dividends paid in the 12 months prior to the date of the merger
    agreement, and (2) for dividends paid to SJNB or Saratoga from a wholly-
    owned subsidiary,

  . not split, combine or reclassify any of its capital stock or issue any
    other securities instead of shares of its capital stock (provided that,
    with respect to SJNB, such restriction would not prevent SJNB from
    implementing a shareholders' rights plan), and

  . subject to certain exceptions, not change its methods of accounting.

   In addition, Saratoga has agreed that it and Saratoga National Bank will
not, without the prior written consent of SJNB:

  . amend the articles of incorporation or bylaws or other organizational
    documents of Saratoga or Saratoga National Bank except as otherwise
    required to perform its obligations under the merger agreement,

  . issue or sell any shares of its capital stock, other than issuances of
    common stock in connection with the exercise of options, or repurchase,
    redeem or otherwise acquire any shares of its or Saratoga National Bank's
    capital stock,

  . enter into any new material line of business or materially change its
    lending, investment, liability management and other material banking
    policies, except as required by law or by policies imposed by a banking
    regulatory authority,

  . subject to certain exceptions, incur or commit to any capital
    expenditures or any obligations or liabilities in connection with capital
    expenditures other than in the ordinary course of business consistent
    with past practice, but in no event for more than $10,000 as to any one
    such item or $50,000 as to all such items in the aggregate,

  . make any acquisition of or enter into any merger with any other business
    organization, except as permitted by certain limited exceptions,

  . sell, lease, encumber or otherwise dispose of, any material assets, other
    than in the ordinary course of business consistent with past practice,

  . incur or guarantee any long-term indebtedness or issue, sell or guarantee
    any long-term debt securities other than (1) indebtedness of Saratoga
    National Bank to Saratoga, (2) deposits taken in the ordinary course of
    business consistent with past practice, or (3) renewals or extensions of
    existing long-term indebtedness without any change in the material terms
    thereof,

  . intentionally take or fail to take any action that would, or reasonably
    might be expected to, result in any of the representations and warranties
    set forth in the merger agreement being or becoming untrue in any
    material respect, or in any of the conditions to the closing set forth in
    the merger agreement not being satisfied or, unless such action is
    required by applicable law or sound banking practice, which would
    adversely affect the ability of SJNB or Saratoga to obtain any of the
    requisite regulatory approvals,

  . subject to certain exceptions, enter into or amend any employee benefit
    plans or agreements or increase the compensation or fringe benefits of
    any director, officer or employee,

  . subject to certain exceptions, commit to or renew any real estate secured
    or construction loan with a principal amount exceeding $1,500,000 or any
    commercial loan with a principal amount exceeding $500,000,


                                       40
<PAGE>

  . issue or agree to issue any letters of credit or otherwise guarantee the
    obligations of any other persons except in the ordinary course of
    business consistent with past practice,

  . engage or participate in any material transaction or incur or sustain any
    material obligation not in the ordinary course of business consistent
    with past practice,

  . settle any claim involving the payment of money damages in excess of
    $50,000 as to any such matter, or settle any other matter not involving
    money damages which is material to Saratoga,

  . except as required by GAAP or applicable law or regulation, change or
    make any tax elections or settle or compromise any material tax
    liability,

  . subject to certain exceptions, make an application for the opening,
    relocation or closing of, or open, relocate or close, any branch or loan
    production office,

  . except as permitted by the merger agreement, enter into any
    securitization or similar transactions with respect to any loans, leases
    or other assets, or

  . agree to, or make any commitment to, take any of the prohibited actions
    described above.

   Additionally, SJNB has agreed that it and its subsidiaries will not, without
the prior written consent of Saratoga:

  . amend its articles of incorporation or its bylaws in a manner that would
    materially and adversely affect (1) its ability to perform it obligations
    under the merger agreement or complete the merger, or (2) the rights,
    powers and privileges of the shares of SJNB common stock to be issued in
    the merger,

  . intentionally take or fail to take any action that would, or reasonably
    might be expected to, result in (1) any of its representations and
    warranties set forth in the merger agreement being or becoming untrue in
    any material respect, or (2) any of the conditions to the closing set
    forth in the merger agreement not being satisfied, or, unless such action
    is required by applicable law or sound banking practice, that would
    adversely affect the ability of SJNB or Saratoga to obtain any of the
    requisite regulatory approvals without imposition of a burdensome
    condition, or

  . agree to, or make any commitment to, take any of the prohibited actions
    described above.

   Under the merger agreement, SJNB further agreed:

  . to use all commercially reasonable efforts to publish as soon as
    practicable after the quarter in which there are at least 30 days of
    post-merger combined operations, combined sales and income figures, and

  . until the effective time of the merger, not to accept a takeover proposal
    from a third party unless such proposal is expressly conditioned upon the
    performance by SJNB of its obligations under the merger agreement;
    provided, however, that SJNB may, under certain circumstances, accept
    such third party takeover proposal by paying or causing to be paid to
    Saratoga the termination fee specified in the merger agreement. See "--
    Fees and Expenses."

Additional Agreements

   Special Shareholders' Meetings. In the merger agreement, each of SJNB and
Saratoga has agreed to call a meeting of its shareholders to be held as
promptly as practicable for the purpose of voting on the merger. Each of SJNB
and Saratoga is required through its board of directors to recommend to its
shareholders approval of the merger agreement unless its board of directors
determines in good faith, based upon the written advice of outside counsel,
that making such recommendation, or failing to withdraw, modify or amend any
previously made recommendation, would constitute a breach of fiduciary duty by
its board of directors under applicable law.


                                       41
<PAGE>

   No Solicitations. From August 27, 1999, until the earlier of the effective
time of the merger or the termination of the merger agreement, Saratoga has
agreed that neither it nor Saratoga National Bank, nor any of their affiliates
or agents, will enter into discussions or negotiations with or provide
information to any person or group of persons (other than SJNB and its
subsidiaries) concerning any inquiry, proposal or offer to acquire in any
manner 20% or more of any class of equity securities of, or a merger,
consolidation, business combination, sale, recapitalization, liquidation,
dissolution or other disposition or similar transaction involving 20% or more
of the assets of, Saratoga or Saratoga National Bank. However, the board of
directors of Saratoga, to the extent required by its fiduciary duty, as
determined in good faith based upon the advice of independent counsel, may
recommend or enter into an agreement with respect to a bona fide takeover
proposal by a third party on terms determined in good faith by the board of
directors of Saratoga to be reasonably capable of being completed, taking into
account all legal, financial, regulatory and other aspects of the proposal and
the person making the proposal and, based on the advice of a financial advisor
of nationally recognized reputation, if consummated, to be more favorable to
the shareholders of Saratoga from a financial point of view than the merger
with SJNB. If the board of directors exercises the right discussed in the
preceding sentence, Saratoga is required to pay to SJNB a termination fee. See
"--Fees and Expenses."

   Filings and Other Actions. In the merger agreement, SJNB and Saratoga have
each agreed to use all reasonable efforts:

  . to take all actions necessary to comply promptly with all legal
    requirements which may be imposed on such party or its subsidiaries with
    respect to the transactions contemplated by the merger agreement, and

  . to obtain (and to cooperate with the other party to obtain) any
    governmental or private consent, authorization, order, exemption or
    approval which is required to be obtained or made by such party or any of
    its subsidiaries in connection with the merger and the other transactions
    contemplated by the merger agreement. In addition, each of Saratoga and
    SJNB has agreed to use all reasonable best efforts to take all actions,
    and to do all things, necessary and proper or advisable to complete, as
    soon as practicable, the transactions contemplated by the merger
    agreement, including using all reasonable best efforts to:

   (1) lift or rescind any injunction or restraining order or other order
       adversely affecting the ability of the parties to complete the merger
       according to the merger agreement,

   (2) defend any litigation seeking to enjoin, prevent or delay the
       completion of the merger according to the merger agreement or seeking
       material damages, and

   (3) provide to counsel to the other party representations and
       certifications as to such matters as such counsel may reasonably
       request in order to render the respective tax opinions described
       under "--Conditions to the Completion of the Merger" and to obtain
       the letters of their independent accountants regarding pooling of
       interests accounting treatment.

   Employee Benefit Plans. Under the merger agreement, SJNB agreed to honor,
and to cause its subsidiaries to honor, all of Saratoga's employee benefits
plans, provided that after the effective time of the merger SJNB or its
subsidiaries may amend, modify or terminate such plans in accordance with their
terms and with applicable law. Additionally, Saratoga has agreed that its
Saratoga Bank Savings Plan or any other 401(k) plans can be terminated,
modified or merged into an appropriate SJNB qualified plan before or after the
effective time of the merger, as determined by SJNB in its sole discretion.
However, Saratoga is not required to take any such action unless SJNB
acknowledges that all material conditions to SJNB's obligation to consummate
the merger have been satisfied or waived and SJNB reasonably believes that the
merger will close.

   Indemnification; Directors' And Officers' Insurance. Under the merger
agreement, from and after the effective time of the merger SJNB will indemnify
and hold harmless each present or former officer or director of Saratoga and
Saratoga National Bank (determined as of the effective time) against (1) all
losses, claims, damages, expenses, liabilities or judgments or amounts that are
paid in the settlement of or in connection with any claim, action, suit,
proceeding or investigation based on or arising out of the fact that such
person is or was a director or officer of Saratoga or Saratoga National Bank
(collectively, "Indemnified Liabilities") and (2) all

                                       42
<PAGE>

Indemnified Liabilities based on or arising out of the merger agreement or the
transactions contemplated by the merger agreement, in each case to the full
extent that Saratoga would have been permitted under applicable law and its
articles of incorporation and SJNB is permitted under California law.

   Additionally, upon the effective time of the merger, SJNB will include in
its director and officer insurance policy any executive officer or director of
Saratoga or Saratoga National Bank who becomes an officer or director of SJNB.
Saratoga has agreed to cooperate with SJNB to obtain extended coverage under
Saratoga's director and officer insurance policy to cover claims made for a
period of three years after the effective time of the merger regarding acts or
omissions of Saratoga's or Saratoga National Bank's directors or officers
prior to the effective time of the merger. However, SJNB will not be obligated
to make annual premium payments for such insurance to the extent such premiums
exceed 150% of the premiums paid by Saratoga and Saratoga National Bank in
respect of 1998 for such insurance, as previously disclosed to SJNB. If the
premiums for such insurance would at any time exceed 150% of the premiums paid
by Saratoga and Saratoga National Bank in respect of 1998 for such insurance,
then SJNB will maintain policies of insurance which, in SJNB's good faith
determination, provide the maximum coverage available at an annual premium
equal to 150% of the premiums paid by Saratoga and Saratoga National Bank in
respect of 1998 for such insurance. Notwithstanding the indemnification rights
described above, the officers and directors of Saratoga and Saratoga National
Bank will retain all indemnification rights and benefits they have under
agreements in effect on the date of the merger agreement. SJNB has agreed to
honor those agreements with respect to any acts or omissions by such officers
or directors occurring prior to the closing of the merger. See "Comparison of
Shareholder Rights--Indemnification of Directors and Executive Officers."

Representations and Warranties

   The merger agreement contains customary mutual representations by each of
SJNB and Saratoga relating to, among other things, (1) ownership by Saratoga
of SJNB's common stock and each party's ownership of capital stock held in a
trust account or in respect of a debt previously contracted, (2) corporate
organization and existence, (3) capitalization, (4) corporate power and
authority to enter into, and due authorization, execution, delivery,
performance and enforceability of, the merger agreement, (5) required
governmental and third party consents and approvals and that neither the
merger agreement nor the transactions contemplated thereby violate either
party's organizational documents, applicable law and certain material
agreements, (6) financial statements, (7) Securities and Exchange Commission
documents, (8) the accuracy of the information provided by each of SJNB and
Saratoga for inclusion in this joint proxy statement/prospectus, (9)
compliance with applicable laws, (10) filing of tax returns, payment of taxes
and related matters, (11) certain material contracts, (12) employee benefit
plans and agreements, (13) the absence of material environmental liability,
(14) title to properties, (15) transactions with affiliates, (16) the absence
of material litigation, (17) subsidiaries, (18) certain bank regulatory
matters, (19) the absence of certain material changes or events since December
31, 1998, (20) the absence of undisclosed liabilities, (21) timely filing of
all material regulatory reports, (22) brokers' and finders' fees, (23)
intellectual property, (24) confirmation that the merger will qualify for
pooling of interests treatment for accounting purposes, (25) compliance with
the Community Reinvestment Act, (26) Year 2000 readiness, (27) insurance, (28)
validity and enforceability of all loans, leases, other extensions of credit,
commitments or other interest-bearing assets and investments of Saratoga, (29)
absence of high risk, highly interest sensitive derivative contracts (except
as disclosed), and (30) absence of collective bargaining agreements.

   In the merger agreement, Saratoga also makes representations and warranties
to SJNB concerning (1) receipt of a fairness opinion from its financial
advisor, (2) absence of restrictions on investments, and (3) absence of
brokered deposits (except as disclosed).

   The representations and warranties of SJNB and Saratoga terminate as of the
effective time of the merger.


                                      43
<PAGE>

Conditions to the Completion of the Merger

   The merger will occur only if all required government approvals are in
effect or have been obtained (without the imposition of any conditions or
requirements as determined by the board of directors of SJNB or Saratoga in its
reasonable judgment which, in general, materially and adversely affect the
economic and business benefits to the parties of the merger) (see "--Required
Regulatory Approvals"), the merger agreement is approved by the majority of the
outstanding shares of Saratoga common stock and SJNB common stock, and the
representations and warranties of the parties are true and correct in all
material respects, and all covenants complied with in all material respects, on
and as of the effective date.

   Additionally, each party's obligation to complete the merger is subject to
various conditions which include, in addition to the other customary closing
conditions, the following:


  .both SJNB and Saratoga shareholders shall have approved the merger
     agreement;

  . all necessary governmental approvals for the merger shall have been
    obtained and any waiting periods required by any governmental entity with
    respect to the merger shall have expired;

  . there shall not be any injunction or restraining order preventing the
    completion of the merger or the transactions contemplated by the merger
    agreement, stock option agreement and agreement of merger, nor shall the
    merger or the transactions contemplated by the merger agreement, stock
    option agreement and agreement of merger be illegal under any applicable
    law;

  . the shares of SJNB common stock to be issued to the shareholders of
    Saratoga in the merger shall have been approved for listing upon official
    notice of issuance on the Nasdaq National Market;

  . no stop orders suspending the effectiveness of the registration statement
    filed by SJNB to register the shares to be issued to Saratoga
    shareholders shall have been issued or proceedings for that purpose
    initiated or threatened by the Securities and Exchange Commission;

  . receipt of a reasonably satisfactory opinion of independent public
    accountants to SJNB to the effect that the merger should qualify for
    "pooling of interests" accounting treatment; and

  . the number of shares held by persons electing to exercise their
    dissenters' rights of appraisal shall not exceed 9% of the number of
    outstanding shares of SJNB common stock and Saratoga common stock.

   In addition, each party's obligation to complete the merger is subject to
the following additional conditions:

  . the representations and warranties of the other party set forth in the
    merger agreement shall be true and correct in all material respects as of
    the date of the merger agreement (except to the extent such
    representations and warranties speak as of an earlier date) and as of the
    closing date;

  . the other party shall have performed in all material respects all of its
    obligations under the merger agreement;

  . such party shall have received a copy of the resolution or resolutions
    duly approved by the board of directors (or a duly authorized committee
    thereof) of the other party and of the holders of the common stock of the
    other party, authorizing the execution, delivery and performance by such
    party of the merger agreement;

  . such party shall have received an opinion of its counsel or independent
    public accountants, dated the closing date, that the merger will be
    treated for federal income tax purposes as a reorganization within the
    meaning of Section 368(a) of the Internal Revenue Code and each party
    will be a party to that reorganization within the meaning of Section
    368(b) of the Internal Revenue Code;

  . in approving the merger agreement, no governmental authority shall have
    imposed a burdensome condition or restriction upon SJNB, Saratoga or
    their subsidiaries or any affiliate which would

                                       44
<PAGE>

   reasonably be expected to (1) have a material adverse effect after the
   effective time of the merger on the present or prospective consolidated
   financial condition, business, operating results or prospects of SJNB or
   the surviving corporation, including, without limitation, any requirement
   to dispose of any material assets or businesses or restrict in any
   significant way any material operations or activities, (2) prevent SJNB or
   its subsidiaries from realizing all or a substantial portion of the
   economic benefits of the transactions contemplated by the merger
   agreement, or (3) materially impair SJNB's ability to exercise and enforce
   its rights under the merger agreement, stock option agreement and
   agreement of merger;

  . each party's accountants shall have provided to the other party a
    "comfort" letter not more than two business days prior to the effective
    date of this joint proxy statement/prospectus with respect to certain
    financial information regarding such party and a "comfort" letter with
    respect to such party's financial statements for the period ending not
    more than five business days prior to the closing date;

  . no material adverse effect upon either party shall have occurred since
    December 31, 1998 and neither party shall be a party to or, so far as
    such party is aware, threatened with, and to such party's knowledge there
    is no reasonable basis for, any legal action or other proceeding before
    any court, any arbitrator of any kind or any government agency, which, in
    the reasonable judgment of the other party, could have a material adverse
    effect upon such party, and the other party shall have received a
    certificate from such party to such effect; and

  . each party shall have received from the other party such certificates and
    other closing documents as counsel for such party shall reasonably
    request.

   In addition, SJNB's obligation to complete the merger is subject to the
following additional condition, which may be waived by SJNB:

  . all conditions, including the receipt of required regulatory approvals,
    required to be satisfied prior to the completion of the merger of
    Saratoga National Bank with and into San Jose National Bank shall have
    been satisfied and such merger shall be able to be consummated as soon as
    practicable following the effective time.

   In addition, Saratoga's obligation to complete the merger is subject to the
following additional conditions, either of which may be waived by Saratoga:

  . SJNB shall have amended its bylaws or taken any other action necessary to
    increase the number of authorized directors on its board of directors to
    permit the appointment of the five Saratoga designees at least five
    business days prior to the closing date; and

  . Saratoga shall have received from its independent accountants a
    supplemental tax opinion with respect to the recognition of gain or loss,
    the holding period and tax basis relating to the exchange of shares of
    Saratoga common stock for shares of SJNB common stock.

Termination of the Merger Agreement

   The merger agreement may be terminated at any time before the effective
time of the merger. If the merger agreement is terminated, the merger will not
occur. The merger agreement may be terminated by action taken or authorized by
the board of directors of the terminating party or parties whether before or
after the approval of the merger agreement by the shareholders of SJNB or
Saratoga:

  . by mutual consent of SJNB and Saratoga in a written instrument,

  . by either party (1) upon written notice to the other party if any bank
    regulator shall have issued an order denying approval of the merger and
    the other material aspects of the transactions contemplated by the merger
    agreement or if any governmental entity with authority to do so shall
    have issued a final

                                      45
<PAGE>

   permanent order enjoining or otherwise prohibiting the completion of the
   merger in accordance with the merger agreement, and the time for appeal or
   petition for reconsideration of any such order shall have expired without
   such appeal or petition being granted, or (2) if any governmental entity
   with authority to do so shall have issued an order in connection with the
   transactions under the merger agreement imposing a burdensome condition on
   SJNB or the surviving corporation, and the time for appeal or petition for
   reconsideration of any such order shall have expired without such appeal
   or petition being granted,

  . by either party, if the merger is not completed on or before March 31,
    2000, except that such termination date may be extended by up to 60 days
    (1) at the election of the non-breaching party, if the merger shall not
    have been consummated due to the volitional breach of any material
    representation, warranty or covenant in the merger agreement by SJNB or
    Saratoga, or (2) at the election of the party who has requested a
    required regulatory approval, in the event that the merger shall not have
    been consummated because such required regulatory approval has not been
    received,

  . by SJNB, in the event of a breach by Saratoga of any representation,
    warranty or covenant contained in the merger agreement, which breach (1)
    either is not cured within 45 days after the giving of written notice to
    Saratoga, or is of a nature which cannot be cured prior to the closing,
    and (2) would entitle the non-breaching party to elect not to complete
    the merger in accordance with the merger agreement under the provisions
    described under "--Conditions to the Completion of the Merger;" provided,
    however, that SJNB may immediately terminate the merger agreement upon
    notice to Saratoga in the event that Saratoga shall breach the covenant
    described under "--Additional Agreements--No Solicitations,"

  . by Saratoga, in the event of a breach by SJNB of any representation,
    warranty or covenant contained in the merger agreement, which breach (1)
    either is not cured within 45 days after the giving of written notice to
    Saratoga, or is of a nature which cannot be cured prior to the closing,
    and (2) would entitle the non-breaching party to elect not to complete
    the merger in accordance with the merger agreement under the provisions
    described under "--Conditions to the Completion of the Merger;" provided
    that Saratoga can terminate the merger agreement within ten business days
    after notice to SJNB in the event SJNB breaches its covenant regarding a
    third party takeover proposal and such breach is not cured within the ten
    business day period, and upon such termination SJNB shall pay to Saratoga
    the termination fee described under "--Fees and Expenses,"

  . by SJNB (1) if a third party makes a written offer to SJNB regarding a
    takeover proposal of SJNB in which such third party indicates that they
    would not be willing to consummate the takeover proposal unless the
    merger agreement is terminated, and (2) the SJNB board of directors
    determines in good faith, based upon the advice of outside counsel, that
    failing to accept such takeover proposal would constitute a breach of
    fiduciary duty by SJNB's board of directors, provided that upon such
    termination SJNB shall pay to Saratoga the termination fee described
    under "--Fees and Expenses,"

  . by SJNB or Saratoga, if the board of directors of the other party (1)
    fails to recommend approval of the merger agreement by its shareholders,
    (2) amends or modifies such recommendation in a manner materially adverse
    to the other party, or (3) withdraws such recommendation to its
    shareholders,

  . by either party (1) if the approval of the merger agreement by the
    shareholders of the other party is not obtained, (2) the "pooling
    letters" are not delivered by the parties' respective accountants
    regarding the availability of pooling accounting treatment to the merger,
    or (3) the aggregate number of shares held by shareholders of SJNB and
    Saratoga exercising dissenters' rights of appraisal exceeds 9%,

  . by Saratoga, by a vote of a majority of the members of its entire board
    during the two business day period beginning on the first business day
    after the "determination date," if the average SJNB closing price
    (calculated over the 20 consecutive trading days ending on the
    determination date) is less than $29.3590. The determination date is the
    last day of the 20 trading day period ending five business days prior to
    the closing date. However, during the five business day period beginning
    on the day after

                                      46
<PAGE>

    receipt of notice of election by Saratoga to terminate under this
    provision, SJNB may elect to adjust the exchange ratio of 0.70 to a number
    equal to the quotient of (1) 29.3590 times 0.70, divided by (2) the
    average SJNB closing price. If SJNB elects to so adjust the exchange
    ratio, then the right of Saratoga to terminate the merger under such
    provision will end, and

  . by either party, if (1) there has been a change, or any event involving a
    prospective change, in the business, financial condition, results of
    operations or prospects of the other party or its subsidiaries that has
    had, or would be reasonably likely to have, a material adverse effect on
    the other party, and (2) if such change or event is not capable of being
    cured or such change or event has not been cured within 45 days of giving
    written notice to the other party.

Fees and Expenses

   Termination Fees. Saratoga is required to pay SJNB a $1.3 million fee
(minus actual expenses paid, if any, by Saratoga to SJNB as described below)
if (1) SJNB terminates the merger for the following reasons and (2) an
acquisition event has occurred within 18 months after the termination where
20% or more of shares of Saratoga common stock or the consolidated assets of
Saratoga and Saratoga National Bank shall have been transferred or disposed of
through tender offer, sale or merger:

  . Saratoga or Saratoga National Bank breaches, in any material respect, any
    representation, warranty or covenant in the merger agreement, which
    breach is not cured within 45 days or is not capable of being cured and
    for which SJNB is entitled to elect not to consummate the merger;

  . the Saratoga board fails to recommend adoption of the merger agreement,
    amends or modifies the recommendation in a materially adverse manner,
    withdraws its recommendation, or approves or recommends a takeover
    proposal (whether or not the board is required by its fiduciary duty to
    accept such takeover proposal); or

  . Saratoga, or any of its subsidiaries, affiliates or agents, solicits,
    initiates, facilitates or enters into discussion or negotiation relating
    to, any takeover proposal.

   SJNB is required to pay Saratoga a $1.3 million fee if the merger is
terminated for the following reasons:

  . by Saratoga, if SJNB accepts any offer or enters into any agreement with
    any third party regarding a takeover proposal (where Saratoga is not
    included) and such condition is not cured within 10 business days; or

  . by SJNB, if SJNB accepts a takeover proposal from a third party which
    requires the termination of the merger agreement and failing to accept
    the proposal would constitute a breach of fiduciary duty.

   Under the merger agreement, the amount of gain realized by SJNB under the
stock option agreement, when added to the termination fees described above (if
any) received by SJNB, cannot exceed in the aggregate $2,200,000. SJNB will
promptly return to Saratoga by wire transfer any such amount in excess of
$2,200,000. See "--Stock Option Agreement."

   General Expenses. Other than in the situations described above and in the
following paragraphs, whether or not the merger is completed in accordance
with the merger agreement, all costs and expenses incurred in connection with
the merger agreement and the transactions covered by the merger agreement will
be paid by the party incurring those expenses.

   If the merger agreement is terminated due to either party's willful breach
of a representation, warranty or covenant, the breaching party will bear all
costs and expenses incurred by the non-breaching party.

   Reimbursement Expenses. If the merger agreement is terminated because
Deloitte & Touche LLP fails to deliver a "poolability letter" at or prior to
the closing, or a material adverse change or prospective change has occurred
in the business, financial condition, results of operations or prospects of
Saratoga or Saratoga National

                                      47
<PAGE>

Bank and such change has not been cured within a specified time, Saratoga shall
pay promptly all costs and expenses incurred by SJNB up to $500,000.

   If the merger agreement is terminated because KPMG LLP fails to deliver a
pooling letter at or prior to the closing or a material adverse change or
prospective change has occurred in the business, financial condition, results
of operations or prospects of SJNB or its subsidiaries and such change has not
been cured within a specified time, SJNB shall pay promptly all costs and
expenses (excluding fees and expenses of First Security Van Kasper) incurred by
Saratoga up to $500,000.

Amendment

   The merger agreement may be amended by the parties at any time before or
after approval of the merger agreement by the shareholders of SJNB and
Saratoga. However, after the approval by the shareholders of SJNB and Saratoga,
no amendment shall be made which by law requires further approval by such
shareholders without such further approval. The merger agreement may not be
amended except by an instrument in writing signed on behalf of each of the
parties.

Extension; Waiver

   At any time prior to the closing of the merger, the parties, by action taken
or authorized by their respective board of directors, may, to the extent
legally allowed, (1) extend the time for the performance of any of the
obligations or other acts of the other parties, (2) waive any inaccuracies in
the representations and warranties contained in the merger agreement or in any
document delivered pursuant to it, and (3) waive compliance with any of the
agreements or conditions contained in the merger agreement. To "waive" means to
give up rights.

   Any agreement on the part of a party to the merger agreement to any such
extension or waiver shall be valid only if set forth in a written instrument
signed on behalf of such party.

Management and Operations Following the Merger

   Upon the consummation of the merger, the separate corporate existence of
Saratoga will cease and Saratoga will be merged with and into SJNB. It is also
anticipated that Saratoga National Bank will be merged into San Jose National
Bank immediately after the merger. All rights, franchises and interests of
Saratoga will be assumed by and vested in SJNB. The articles of incorporation
and bylaws of SJNB in effect immediately prior to the effective date shall be
and continue to be the articles of incorporation and bylaws of SJNB following
the merger. The directors and executive officers of SJNB prior to the effective
date will be the directors and executive officers of SJNB following the merger
except that (1) five Saratoga directors will be added to the boards of
directors of each of SJNB and San Jose National Bank and (2) Richard L. Mount,
Chairman, President and Chief Executive Officer of Saratoga, will be appointed
to serve on the executive management committee of SJNB.

Required Regulatory Approvals

   The merger must be approved by the Board of Governors of the Federal Reserve
System (the "Federal Reserve Board") pursuant to the provisions of the BHC Act
or be exempt under the BHC Act. In conducting a review of any application for a
merger, the Federal Reserve Board is required to consider the financial and
managerial resources and future prospects of the companies and the banks
concerned and the convenience and needs of the community to be served. The
Federal Reserve Board has the authority to deny an application if it concludes
that the requirements of the Community Reinvestment Act of 1977, as amended,
are not satisfied.

   SJNB believes that the merger is exempt from the approval requirements of
the BHC Act pursuant to an exemption set forth in Regulation Y of the Federal
Reserve Board. SJNB filed a notice with the Federal Reserve Board to obtain
confirmation of the exemption on October 14, 1999. Receipt of confirmation of
an exemption

                                       48
<PAGE>

under the BHC Act or final regulatory approval by the Federal Reserve Board is
a precondition to the consummation of the merger. See "--Conditions to the
Completion of the Merger." By letter dated October 27, 1999, the Federal
Reserve Board confirmed the above mentioned exemption.

   A transaction approved by the Federal Reserve Board may not be consummated
for at least 30 days (in some circumstances a 15-day waiting period is allowed)
after such approval. During such period, the Department of Justice may commence
a legal action challenging the transaction under federal antitrust laws. If the
Department of Justice does not commence a legal action during such 30-day
period (in some circumstances a 15-day waiting period is allowed), it may not
thereafter challenge the transaction except in an action commenced under the
anti-monopoly provisions of Section 2 of the Sherman Antitrust Act.

   The BHC Act provides for the publication of notice and the opportunity for
administrative hearings relating to an application for approval under the BHC
Act and authorizes the Federal Reserve Board to permit interested parties to
intervene in the proceedings. If an interested party is permitted to intervene,
such intervention could substantially delay the regulatory approval required
for consummation of the merger.

   The merger of San Jose National Bank and Saratoga National Bank (the "Bank
Merger") is subject to the prior approval of the Office of the Comptroller of
the Currency under Section 18(c) of the Federal Deposit Insurance Act, as
amended (the "Bank Merger Act") and Section 215a of the National Bank Act, as
amended. SJNB filed an application for approval of the Bank Merger with the
Comptroller of the Currency under the Bank Merger Act on October 14, 1999. By
letter dated October 19, 1999, the Comptroller of the Currency advised San Jose
National Bank that its application was eligible for expedited processing; it is
expected that the Comptroller of the Currency will act upon the application on
or before November 29, 1999.

   The Bank Merger Act requires the Office of the Comptroller of the Currency,
when approving a transaction such as the Bank Merger, to take into
consideration the financial and managerial resources (including the competence,
experience and integrity of the officers, directors and principal shareholders)
and future prospects of the existing and proposed institutions and the
convenience and needs of the communities to be served. In considering financial
resources and future prospects, the Office of the Comptroller of the Currency
will, among other things, evaluate the adequacy of the capital levels of the
parties to a proposed transaction and of the resulting institutions.

   The Bank Merger Act prohibits the Office of the Comptroller of the Currency
from approving a merger if it would result in a monopoly or be in furtherance
of any combination or conspiracy to monopolize or to attempt to monopolize the
business of banking in any part of the United States, or if its effect in any
section of the country would be substantially to lessen competition or to tend
to create a monopoly, or if it would in any other manner result in a restraint
of trade, unless the Office of the Comptroller of the Currency finds that the
anti-competitive effects of the merger are clearly outweighed in the public
interest by the probable effect of the transaction in meeting the convenience
and needs of the communities to be served. In addition, under the Community
Reinvestment Act of 1977, as amended, the Office of the Comptroller of the
Currency must take into account the record of performance of the existing
institutions in meeting the credit needs of the entire community, including
low- and moderate-income neighborhoods, served by such institutions.

   The Office of the Comptroller of the Currency will furnish notice and a copy
of the application for approval of the merger to the Federal Reserve Board, the
Federal Deposit Insurance Corporation and the United States Department of
Justice. These agencies have 30 days to submit their views and recommendations
to the Office of the Comptroller of the Currency. The Bank Merger Act also
provides for the publication of notice and public comment on applications filed
with the Office of the Comptroller of the Currency and authorizes such agency
to permit interested parties to intervene in the proceedings. If an interested
party is permitted to intervene, the intervention could delay the regulatory
approvals required for completion of the merger.

   Saratoga and SJNB believe that neither the merger nor the merger of Saratoga
National Bank into San Jose National Bank will raise substantial antitrust or
other significant regulatory concerns and that they will be able to obtain all
requisite regulatory approvals on a timely basis without the imposition of any
condition that would have a material adverse effect.


                                       49
<PAGE>

   Under the merger agreement, prior to the merger, all governmental approvals
required for the merger shall be in effect, and all conditions or requirements
prescribed by law or any governmental approval shall be satisfied. However, no
governmental approval shall be deemed to have been received if it imposes any
condition or requirement or disapproves any aspect of any applications which,
in the reasonable opinion of the board of directors of SJNB or Saratoga
materially and adversely affects the anticipated economic and business benefits
to SJNB or Saratoga of the transactions contemplated by the merger agreement as
to render consummation of such transaction inadvisable.

   Based on current precedents, the respective managements of SJNB and Saratoga
believe that the merger and other exemptions, consents and approvals will be
obtained from the Federal Reserve Board and the Office of the Comptroller of
the Currency and the merger will not be subject to challenge by the Department
of Justice under federal antitrust laws. However, no assurance can be provided
that the Federal Reserve Board, the Office of the Comptroller of the Currency
or the Department of Justice will concur in this assessment or that, in
connection with the grant of any exemption or approval by the Federal Reserve
Board or the Office of the Comptroller of the Currency, any exemption or action
taken, or statute, rule, regulation or order enacted, entered, enforced or
deemed applicable to the merger or transactions contemplated thereby, will not
contain conditions or requirements which so materially and adversely affect the
anticipated economic and business benefits of the merger as further described
in the merger agreement. If such a material and adverse condition or
requirement is imposed in connection with a governmental approval, a condition
to SJNB's obligation to consummate the merger will be deemed not to have
occurred and SJNB will have the right to terminate the merger agreement.

Stock Option Agreement

   The following is a summary of the material provisions of the Stock Option
Agreement entered into between SJNB and Saratoga following the execution of the
merger agreement (the "Stock Option Agreement"), which is attached as Annex B
to this joint proxy statement/prospectus and is incorporated herein by
reference. This summary is qualified in its entirety by reference to the Stock
Option Agreement. Certain capitalized terms which are used but not defined
herein have the meanings assigned thereto in the Stock Option Agreement.

   The Stock Option Agreement could have the effect of discouraging persons who
now or prior to the effective date might be interested in acquiring all or a
significant interest in Saratoga from considering or proposing such an
acquisition, even if such persons were prepared to propose greater
consideration per share for Saratoga common stock than the consideration per
share represented by the pricing structure in the merger agreement. In
addition, the merger agreement provides that Saratoga and Saratoga National
Bank will not, directly or indirectly, solicit or encourage, or take any other
action to facilitate, any inquiries or the making of any proposal which
constitutes, or may reasonably be expected to lead to, any takeover proposal.
See "--Conduct of Business Pending the Merger."

   Shares Subject to the Option. The Stock Option Agreement provides for the
purchase by SJNB of up to 378,561 shares, subject to certain adjustments, of
Saratoga common stock (the "Option Shares") at an exercise price, subject to
certain adjustments, of $19.21 per share, payable in cash (the "Stock Option").
The Option Shares, if issued pursuant to the Stock Option Agreement, would
represent approximately 19.9% of the issued and outstanding shares (excluding
treasury shares) of Saratoga's common stock after giving effect to the issuance
of any shares pursuant to an exercise of the Stock Option and in no event will
the number of Option Shares exceed 19.9% of Saratoga's issued and outstanding
common stock.

   Adjustment of Shares Subject to the Option and Option Exercise Price. The
number of shares of Saratoga common stock subject to the Stock Option will be
increased to the extent that Saratoga issues additional shares of common stock
(otherwise than pursuant to an exercise of the Stock Option) such that the
number of Option Shares will continue to equal 19.9% of the then issued and
outstanding shares of Saratoga common stock without giving effect to the
issuance of shares pursuant to an exercise of the Stock Option. In the event
that Saratoga issues or agrees to issue any shares of common stock (other than
as permitted under the merger

                                       50
<PAGE>

agreement) at a price less than $19.21 per share (or lower than an adjusted
price per share), the exercise price will be equal to such lesser price. The
number of shares of Saratoga common stock subject to the Stock Option, and the
applicable exercise price per Option Share, also will be appropriately adjusted
in the event of any stock dividend, split-up, merger, recapitalization,
combination, subdivision, conversion, exchange of shares, distribution on or in
respect of the Saratoga common stock that would be prohibited under the terms
of the merger agreement, or similar event relating to Saratoga.

   Exercise of the Option. SJNB or any other holder or holders of the Stock
Option (collectively, the "Holder") may exercise the Stock Option, in whole or
in part, subject to regulatory approval, at any time within 30 days (subject to
extension as provided in the Stock Option Agreement) after both an "Initial
Triggering Event" and a "Subsequent Triggering Event" (as such terms are
hereinafter defined) occur prior to termination of the Stock Option.

   "Initial Triggering Event" is defined as the occurrence of any of the
following events:

  (1) Saratoga or Saratoga National Bank or any Saratoga Affiliate (as
      defined below), without SJNB's prior written consent, shall enter into
      an agreement with any person (other than SJNB or any subsidiary of SJNB
      to engage in, or the Saratoga board of directors recommends that the
      holders of Saratoga common stock approve or accept (other than as
      contemplated by the merger agreement), (A) a merger, consolidation or
      similar transaction involving Saratoga or Saratoga National Bank, (B) a
      purchase, lease, or other acquisition representing 15% or more of the
      consolidated assets of Saratoga and Saratoga National Bank, or (C) a
      purchase or other acquisition (including by way of merger,
      consolidation, share exchange or otherwise) of securities representing
      10% or more of the voting power of Saratoga or Saratoga National Bank
      (each of the transactions described in the preceding clauses (A), (B)
      and (C) being referred to in this paragraph and in the Stock Option
      Agreement as an "Acquisition Transaction");

  (2) Saratoga or Saratoga National Bank or any Saratoga Affiliate, without
      having received SJNB's prior written consent, shall have authorized,
      recommended, proposed or publicly announced its intention to authorize,
      recommend or propose, to engage in an Acquisition Transaction with any
      person other than SJNB or a SJNB Subsidiary, or the Saratoga board or
      directors shall have publicly withdrawn or modified, or publicly
      announced its intent to withdraw or modify, in any manner adverse to
      SJNB, its recommendation that the holders of Saratoga common stock
      approve the transactions contemplated by the merger agreement;

  (3) any person (other than SJNB, any SJNB Subsidiary or Saratoga National
      Bank acting in a fiduciary capacity) shall acquire beneficial ownership
      or the right to acquire beneficial ownership of 10% or more of the
      outstanding shares of Saratoga common stock;

  (4) any person (other than SJNB or any SJNB Subsidiary) shall make a bona
      fide proposal to Saratoga or its shareholders by public announcement or
      written communication that is or becomes subject to public disclosure
      to engage in an Acquisition Transaction;

  (5) a third party shall make a proposal to Saratoga or its shareholders to
      engage in an Acquisition Transaction, after which Saratoga shall have
      breached any covenant or obligation contained in the merger agreement,
      which breach would entitle SJNB to terminate the merger agreement, if
      such breach is not cured prior to the date that SJNB sends notice of
      its exercise of the Stock Option to Saratoga; or

  (6) any person (other than SJNB or any SJNB Subsidiary), other than in
      connection with a transaction to which SJNB has given its prior written
      consent, shall file an application or notice with the Federal Reserve
      Board, or other federal or state bank regulatory authority, which
      application or notice has been accepted for processing, for approval to
      engage in an Acquisition Transaction.

   "Saratoga Affiliate" is defined as any person who or which, together with
all affiliates and associates of such person, is the beneficial owner of 5% or
more of the shares of Saratoga common stock then outstanding.

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<PAGE>

"Saratoga Affiliate" does not include Saratoga, Saratoga National Bank, any
employee benefit plan of Saratoga or Saratoga National Bank, or any entity
holding shares of Saratoga common stock for or pursuant to the terms of any
such plan.

   "Subsequent Triggering Event" is defined as either (A) the acquisition by
any person (other than SJNB or any SJNB Subsidiary) of beneficial ownership of
20% or more of the then outstanding Saratoga common stock, or (B) the
occurrence of the Initial Triggering Event described in clause (1) above,
except that the percentage referred to in subclause (C) shall be 20%.

   Termination of the Option. The Stock Option Agreement terminates (1) at the
effective time of the merger, (2) upon termination of the merger agreement in
accordance with the terms thereof if such termination occurs prior to the
occurrence of an Initial Triggering Event (except a termination by SJNB
pursuant to the merger agreement, resulting from a volitional breach by
Saratoga of a representation, warranty or covenant therein), (3) 12 months
after termination of the merger agreement following the occurrence of an
Initial Triggering Event unless the merger agreement is terminated by SJNB as a
result of a volitional breach by Saratoga of a representation, warranty or
covenant therein (provided that if an Initial Triggering Event occurs after or
continues beyond such termination and prior to the passage of such 12-month
period, the Stock Option will terminate 12 months from the expiration of the
last Initial Triggering Event, but in no event more than 18 months after such
termination) or (4) August 27, 2002.

   Within 30 days (subject to extension as provided in the Stock Option
Agreement) after a Subsequent Triggering Event and prior to the termination of
the Stock Option, SJNB (on behalf of itself or any subsequent Holder) may
demand that the Stock Option and the related Option Shares be registered under
the Securities Act. Upon such demand, Saratoga must promptly prepare, file and
keep current a shelf registration, subject to certain exceptions. SJNB is
entitled to two such registrations so long as the second request is within 18
months of the first request.

   Notwithstanding any other provision of the Stock Option Agreement, if a
Holder, the owner of the Option Shares, or certain related parties offer or
propose to engage in an Acquisition Transaction (other than as contemplated by
the merger agreement) without the prior written consent of Saratoga, then (1)
in the case of a Holder or related party thereof, the Stock Option held by it
will immediately terminate and be of no further force or effect and (2) in the
case of an Owner or any related party thereof, the Option Shares held by it
will be repurchasable by Saratoga immediately at the then applicable Stock
Option exercise price.

   If the Stock Option terminates under certain circumstances as described in
the Stock Option Agreement, SJNB (or any subsequent Holder) may have as many as
30 days subsequent to such termination to exercise the Stock Option (or
Substitute Option (as hereinafter defined)) in connection with the resale of
Saratoga common stock or other securities pursuant to a registration statement
as provided in the Stock Option Agreement.

   Repurchase at Option of SJNB. Within 30 days (subject to extension as
provided in the Stock Option Agreement) after a Subsequent Triggering Event and
prior to termination of the Stock Option, subject to regulatory approval,
Saratoga is required (1) at the request of the Holder, to repurchase the Stock
Option from the Holder at a price (the "Option Repurchase Price") equal to the
amount by which (x) the "market/offer price" (as hereinafter defined) exceeds
(y) the then applicable Stock Option exercise price, multiplied by the number
of shares for which the Stock Option may then be exercised; and (2) at the
request of the Owner, to repurchase such number of Option Shares from the Owner
as the Owner designates at a price per share (the "Option Share Repurchase
Price") equal to the "market/offer price" multiplied by the number of Option
Shares so designated. "Market/offer price" means the highest of (A) the highest
price per share of Saratoga common stock at which a tender offer or exchange
offer therefor has been made, (B) the price per share of Saratoga common stock
to be paid by any third party pursuant to an agreement with Saratoga, (C) the
highest closing price per share for shares of Saratoga common stock quoted on
the principal trading market for the shares within the six-month period
immediately preceding the date the Holder gives notice of the required
repurchase of the Stock Option or the Owner gives notice of the required
repurchase of the Option Shares, as

                                       52
<PAGE>

the case may be, or (D) in the event of a sale representing 15% or more of
Saratoga's consolidated assets, the sum of the price paid in such sale for such
assets and the current market value of the remaining assets of Saratoga as
determined by a nationally recognized investment banking firm, selected by the
Holder or the Owner, as the case may be, divided by the number of shares of
Saratoga common stock outstanding at the time of such sale.

   Substitute Option. In the event that, prior to termination of the Stock
Option, Saratoga enters into an agreement (1) to consolidate with or merge into
any entity other than SJNB or any SJNB Subsidiary and shall not be the
continuing or surviving corporation of such consolidation or merger, (2) to
permit any entity other than SJNB or any SJNB Subsidiary to merge into Saratoga
with Saratoga as the continuing or surviving corporation, but in connection
therewith the then outstanding shares of Saratoga common stock are changed into
or exchanged for stock or other securities of any other person or cash or any
other property, or the then outstanding shares of Saratoga common stock shall
after such merger represent less than 50% of the outstanding shares and share
equivalents of the merged company, or (3) to sell or transfer all or
substantially all of its assets to any entity other than to SJNB or any SJNB
Subsidiary, then the Stock Option will be converted into, or exchanged for, an
option (a "Substitute Option") to purchase shares of common stock of, at the
Holder's option, either the continuing or surviving corporation of a merger or
a consolidation, the transferee of all or substantially all of Saratoga's
assets, or the person controlling such continuing or surviving corporation or
transferee. The number of shares subject to the Substitute Option and the
exercise price per share will be determined in accordance with a formula in the
Stock Option Agreement. To the extent possible, the Substitute Option will
contain other terms and conditions that are the same as those in the Stock
Option Agreement.

   Repurchase of Substitute Option or Shares. Subject to regulatory approval,
the issuer of a Substitute Option will be required to repurchase such option at
the request of the holder thereof and to repurchase any shares of such issuer's
common stock ("Substitute Common Stock") issued upon exercise of a Substitute
Option ("Substitute Shares") at the request of the owner thereof. The
repurchase price for a Substitute Option will equal the amount by which (A) the
"Highest Closing Price" (as hereinafter defined) exceeds (B) the exercise price
of the Substitute Option, multiplied by the number of shares of Substitute
Shares for which the Substitute Option may then be exercised. The repurchase
price for any Substitute Shares that have been issued from a prior exercise of
the Substitute Option will equal Highest Closing Price multiplied by the number
of Substitute Shares. As used herein, "Highest Closing Price" means the highest
closing price for shares of Substitute Common Stock within the six-month period
immediately preceding the date the Holder gives notice of the required
repurchase of the Substitute Option or the owner gives notice of the required
repurchase of Substitute Shares, as the case may be.

   Assignability. Neither SJNB nor Saratoga may assign any of its respective
rights and obligations under the Stock Option Agreement or the Stock Option to
any other person without the other party's written consent, except that if a
Subsequent Triggering Event occurs prior to termination of the Stock Option,
then within 30 days thereafter (subject to extension as provided in the Stock
Option Agreement), SJNB, SJNB may assign in whole or in part its rights and
obligations thereunder. In addition, until 15 days after the Federal Reserve
Board approves an application by SJNB to acquire the Option Shares, SJNB may
not assign its rights under the Stock Option except in (i) a widely dispersed
public distribution, (ii) a private placement in which no one party acquires
the right to purchase in excess of 2% of the voting shares of Saratoga, (iii)
an assignment to a single party for the purpose of conducting a widely
dispersed public distribution on SJNB's behalf, or (iv) any other manner
approved by the Federal Reserve Board provided that such assignment can be made
in compliance with applicable law.

   Notice of Exercise. In the event SJNB (or any subsequent Holder) wishes to
exercise the Stock Option, it must send to Saratoga a written notice specifying
(1) the total number of shares it will purchase pursuant to such exercise and
(2) a place (subject to SJNB's reasonable approval), and a "closing date" not
less than three nor more than 30 business days from the date of the exercise
notice. If the purchase and sale of the Stock Option cannot be consummated
because of an applicable judgment, decree, order, law or regulation, the period
of time referred to in this paragraph shall run from the date that the
restriction on consummation lapses. If prior

                                       53
<PAGE>

notification to or approval of the Federal Reserve Board is required, SJNB (or
any subsequent Holder) must promptly file the required notice or application.
In such a case, the period of time referred to in this paragraph will run from
the date the notification period expires or any necessary approval is granted.
In no event shall the closing date be more than 18 months after the date of the
exercise notice.

   The rights and obligations of SJNB under the Stock Option Agreement are
subject to receipt of any required regulatory approvals. Without the prior
approval of the Federal Reserve Board, SJNB may not acquire more than 5% of the
outstanding common stock of Saratoga. SJNB intends to file an application for
such approval as soon as practicable.

Certain Federal Income Tax Consequences

   The following discussion summarizes the material United States federal
income tax consequences of the merger. The discussion does not address all
aspects of United States federal taxation that may be relevant to you, and it
may not be applicable to Saratoga shareholders who, for United States federal
income tax purposes, are nonresident alien individuals, foreign corporations,
foreign partnerships, foreign trusts or foreign estates, or who acquired their
Saratoga common stock pursuant to the exercise of Saratoga stock options or
otherwise as compensation. You should consult your own tax advisor as to the
particular tax consequences of the merger to you.

   This discussion is based on the Internal Revenue Code of 1986, as amended,
regulations thereunder, current administrative rulings and practice, and
judicial precedent, all of which are subject to change. Any such change, which
may or may not be retroactive, could alter the tax consequences to you as
discussed in this joint proxy statement/prospectus. This discussion assumes
that you hold your Saratoga common stock as a capital asset within the meaning
of section 1221 of the Internal Revenue Code.

   SJNB is not required to complete the merger unless SJNB receives an opinion
of Pillsbury Madison & Sutro LLP, counsel to SJNB, based upon certain customary
assumptions and representations made by SJNB and Saratoga, and to the effect
that under currently applicable law for United States federal income tax
purposes:

  . The merger will constitute a reorganization within the meaning of section
    368(a) of the Internal Revenue Code; and

  . SJNB and Saratoga will each be a party to that reorganization within the
    meaning of section 368(b) of the Internal Revenue Code.

   Saratoga's obligation to complete the merger is conditioned upon Saratoga
receiving an opinion of Deloitte & Touche LLP, independent accountants to
Saratoga, or other accounting or law firm reasonably acceptable to SJNB, based
upon certain customary assumptions and representations made by SJNB and
Saratoga, and to the effect that under currently applicable law for United
States federal income tax purposes:

  . The merger should constitute a reorganization within the meaning of
    section 368(a) of the Internal Revenue Code;

  . SJNB and Saratoga should each be a party to that reorganization within
    the meaning of section 368(b) of the Internal Revenue Code;

  . except for any cash received in lieu of any fractional share, no gain or
    loss should be recognized by the holders of Saratoga common stock who
    receive SJNB common stock in exchange for the Saratoga common stock which
    they hold;

  . the holding period of the SJNB common stock exchanged for Saratoga common
    stock should include the holding period of the Saratoga common stock for
    which it is exchanged, assuming the shares of Saratoga common stock are
    capital assets in the hands of the holder thereof at the effective time;
    and

                                       54
<PAGE>

  . the basis of the SJNB common stock received in the exchange should be the
    same as the basis of the Saratoga common stock for which it was
    exchanged, less any basis attributable to fractional shares for which
    cash is received.

   In the event Saratoga fails to receive the foregoing opinion from Deloitte &
Touche LLP or other accounting or law firm reasonably acceptable to SJNB, such
condition shall be deemed satisfied to the extent Saratoga shall have received
an opinion from Pillsbury Madison & Sutro LLP to the effect that, under
currently applicable law for United States federal income tax purposes, the
merger should constitute a reorganization within the meaning of section 368(a)
of the Internal Revenue Code and SJNB and Saratoga should each be a party to
that reorganization within the meaning of section 368(b) of the Internal
Revenue Code.

   You will recognize no gain or loss if you receive solely SJNB common stock
in exchange for shares of Saratoga common stock you hold, except with respect
to cash received instead of fractional shares of SJNB common stock.

  . The holding period of the shares of SJNB common stock you receive in the
    merger (including any fractional share of SJNB common stock deemed to be
    received by you, as described below), will include the holding period of
    the shares of Saratoga common stock you exchange for the shares of SJNB
    common stock; and

  . The aggregate adjusted tax basis of the shares of SJNB common stock you
    receive in the merger (including any fractional share of SJNB common
    stock deemed to be received by you, as described below), will be equal to
    the aggregate adjusted tax basis of the shares of Saratoga common stock
    surrendered by you for the shares of SJNB common stock.

   Each of Pillsbury Madison & Sutro LLP and Deloitte & Touche LLP has
indicated that it expects to be able to deliver its tax opinion. No ruling has
been or will be obtained from the Internal Revenue Service in connection with
the merger. Opinions of counsel are not binding on the Internal Revenue Service
or the courts.

   Although not explicitly addressed in either the Pillsbury Madison & Sutro
LLP nor Deloitte & Touche LLP opinion, the following federal income tax
consequences will occur as a result of the merger being classified as a
reorganization within the meaning of section 368(a) of the Internal Revenue
Code. Neither SJNB nor Saratoga will recognize gain or loss solely as a result
of the merger. In addition, if you receive cash in the merger instead of a
fractional share of SJNB common stock, then you will be treated as if you
received the fractional share in the merger and then SJNB redeemed the
fractional share in exchange for the cash. You will generally be required to
recognize gain or loss equal to the difference between the amount of cash
received and the portion of your adjusted tax basis in the shares of SJNB
common stock allocable to the fractional share.

   The foregoing is a general discussion of the material United States federal
income tax consequences of the merger and is included for general information
only. The foregoing discussion does not take into account the particular facts
and circumstances of your status and attributes. As a result, the United States
federal income tax consequences addressed in the foregoing discussion may not
apply to you. In view of the individual nature of income tax consequences, you
are urged to consult your own tax advisor to determine the specific tax
consequences of the merger to you, including the application and effect of
United States federal, state, local and other tax laws and the possible effects
of changes in United States federal and other tax laws.

Accounting Treatment

   For accounting and financial reporting purposes, the merger is intended to
be treated as a pooling of interests of Saratoga by SJNB under generally
accepted accounting principles. Under the pooling of interests accounting
method, SJNB will carry forward on its books the assets and liabilities of
Saratoga at their historical recorded values. The unaudited pro forma combined
financial information contained in this joint proxy statement/prospectus have
been prepared using the pooling of interests method of accounting to account
for the

                                       55
<PAGE>

merger. See "Summary--Selected Historical and Pro Forma Financial Data" and
"Unaudited Pro Forma Condensed Combined Financial Information."

Trading Markets for Stock

   The SJNB common stock is listed on the Nasdaq National Market. SJNB intends
to cause the shares of SJNB common stock to be issued in the merger and the
shares of SJNB common stock to be reserved for issuance upon the exercise of
existing Saratoga stock options to be approved for listing on the Nasdaq
National Market, subject to official notice of issuance, prior to the effective
date.

   The Saratoga common stock is currently quoted on the OTC Bulletin Board. If
the merger is consummated, SJNB will take action to cause such shares to cease
to be quoted on the OTC Bulletin Board and public trading of such shares will
cease.

Resales of SJNB Common Stock

   The SJNB common stock issued pursuant to the merger will be freely
transferable under the Securities Act, except for shares issued to any Saratoga
shareholder who may be deemed to be an "affiliate" of SJNB or Saratoga for
purposes of Rule 145 under the Securities Act. Each director and executive
officer of Saratoga is deemed to be such an affiliate. Each such director and
each other person deemed to be an affiliate has entered into an agreement with
SJNB providing that such person will not transfer any shares of SJNB common
stock received in the merger, except in compliance with the Securities Act and
applicable rules thereunder.

                                       56
<PAGE>

                        DISSENTERS' RIGHTS OF APPRAISAL

Appraisal Rights of SJNB Shareholders

   Dissenters' rights will be available to the shareholders of SJNB only if the
holders of five percent (5%) or more of SJNB common stock make a written demand
upon SJNB for the purchase of dissenting shares in accordance with Chapter 13
of the California General Corporation Law ("Chapter 13"). If this condition is
satisfied and the merger is consummated, shareholders of SJNB who dissent from
the merger by complying with the procedures set forth in Chapter 13 would be
entitled to receive an amount equal to the fair market value of their shares as
of August 27, 1999, the last day before the public announcement of the merger.
The high, low and closing sales prices for SJNB common stock on August 27, 1999
were $33.25, $33.125 and $33.25, respectively. A copy of Chapter 13 of the
California General Corporation Law is attached hereto as Annex E and should be
read for more complete information concerning dissenters' rights. The required
procedure set forth in Chapter 13 of the California General Corporation Law
must be followed exactly or any dissenters' rights may be lost. The information
set forth below is a general summary of dissenters' rights as they apply to
SJNB shareholders and is qualified in its entirety by reference to Annex E.

   In order to be entitled to exercise dissenters' rights, a shareholder of
SJNB must vote "AGAINST" the merger. Thus, any SJNB shareholder who wishes to
dissent and executes and returns a proxy in the accompanying form must specify
that his or her shares are to be voted "Against" the merger. If the shareholder
returns a proxy without voting instructions or with instructions to vote "For"
the merger, his or her shares will automatically be voted in favor of the
merger and the shareholder will lose any dissenters' rights. In addition, if
the shareholder abstains from voting his or her shares, the shareholder will
lose his or her dissenters' rights.

   Furthermore, in order to preserve his or her dissenters' rights, an SJNB
shareholder must make a written demand upon SJNB for the purchase of dissenting
shares and payment to such shareholder of their fair market value, specifying
the number of shares held of record by such shareholder and a statement of what
the shareholder claims to be the fair market value of those shares as of August
27, 1999. Such demand must be addressed to SJNB Financial Corp., One North
Market Street, San Jose, California 95113; Attention: Corporate Secretary, and
must be received by SJNB not later than the date of SJNB's special meeting. A
vote "Against" the merger does not constitute such written demand.

   If the holders of five percent (5%) or more of the outstanding shares of
SJNB common stock have submitted a written demand for SJNB to purchase their
shares, these demands are received by SJNB on or before the date of the Special
Meeting and the merger is approved by the shareholders, SJNB will have 10 days
after such approval to send to those shareholders who have voted against the
approval of the merger written notice of such approval accompanied by a copy of
Chapter 13, a statement of the price determined by SJNB to represent the fair
market value of the dissenting shares as of August 27, 1999, and a brief
description of the procedure to be followed if a shareholder desires to
exercise dissenters' rights. Within 30 days after the date on which the notice
of the approval of the merger is mailed, the dissenting shareholder must
surrender to SJNB, at the office designated in the notice of approval, the
certificates representing the dissenting shares to be stamped or endorsed with
a statement that they are dissenting shares or to be exchanged for certificates
of appropriate denomination so stamped or endorsed. Any shares of SJNB common
stock that are transferred prior to their submission for endorsement lose their
status as dissenting shares.

   If SJNB and the dissenting shareholder agree that the surrendered shares are
dissenting shares and agree upon the price of the shares, the dissenting
shareholder will be entitled to the agreed price with interest thereon at the
legal rate on judgments from the date of the agreement. Payment of the fair
market value of the dissenting shares shall be made within 30 days after the
amount thereof has been agreed upon or 30 days after any statutory or
contractual conditions to the merger have been satisfied, whichever is later,
subject to the surrender of the certificates therefor, unless provided
otherwise by agreement.

   If SJNB denies that the shares surrendered are dissenting shares, or SJNB
and the dissenting shareholder fail to agree upon a fair market value of such
shares of SJNB common stock, then the dissenting shareholder of

                                       57
<PAGE>

SJNB must, within six months after the notice of approval is mailed, file a
complaint at the Superior Court of the proper county requesting the court to
make such determinations or intervene in any pending action brought by any
other dissenting shareholder. If the complaint is not filed or intervention in
a pending action is not made within the specified six-month period, the
dissenters' rights are lost. If the fair market value of the dissenting shares
is at issue, the court will determine, or will appoint one or more impartial
appraisers to determine, such fair market value.

   A dissenting shareholder may not withdraw his or her dissent or demand for
payment unless SJNB consents to such withdrawal.

Appraisal Rights of Saratoga Shareholders

   If the merger agreement is approved by the required vote of Saratoga
shareholders, and is not abandoned or terminated, shareholders of Saratoga who
did not vote "FOR" the merger may be entitled to certain dissenters' appraisal
rights under Chapter 13 of the California General Corporation Law.

   The following discussion is not a complete statement of the California
General Corporation Law relating to dissenters' rights, and is qualified in its
entirety by reference to sections 1300 through 1312 of the California General
Corporation Law attached to this joint proxy statement/prospectus as Annex E
and incorporated herein by reference. This discussion and sections 1300 through
1312 of the California General Corporation Law should be reviewed carefully by
any Saratoga shareholder who wishes to exercise statutory dissenters' rights or
wishes to preserve the right to do so, since failure to comply with the
required procedures will result in the loss of such rights.

   If the merger is consummated, those shareholders who elect to exercise their
dissenters' rights and who timely perfect such rights in accordance with
applicable law will be entitled to receive the "fair market value" of their
shares in cash. Pursuant to section 1300(a) of the California General
Corporation Law, such "fair market value" would be determined as of the day
before the first announcement of the terms of the merger, excluding any
appreciation or depreciation in consequence of the proposed merger, but
adjusted for any stock split, reverse stock split, or share dividend which
becomes effective thereafter. For example, assuming the "fair market value" of
Saratoga common stock on August 27, 1999, the day before the first announcement
of the terms of the merger, is the last reported sale price of the stock on the
OTC Bulletin Board, then a dissenting shareholder of Saratoga common stock may
be entitled to receive $19.00 per share.

   Shares must satisfy each of the following requirements to qualify as
dissenting shares ("Dissenting Shares") under the California General
Corporation Law: (i) the shares must have been outstanding on the record date
for the special meeting (and, therefore, shares acquired after such record date
upon exercise of options to purchase common stock may not constitute Dissenting
Shares); (ii) the shares must not have been voted "FOR" approval of the merger
agreement and the transactions contemplated thereby, including the merger; and
(iii) the holder of such shares must submit certificates for endorsement as
described below. If a holder of Saratoga common stock votes "FOR" the approval
of the merger agreement, including the merger, and the transactions
contemplated thereby, such holder will lose any dissenters' rights that may
exist with respect to the subject shares. Executing and returning a proxy with
no voting instructions indicated thereon will be counted as a vote "FOR" the
merger agreement, including the merger.

   If the merger is approved at the Saratoga special meeting of shareholders,
Saratoga will, within ten days after such approval, mail to any shareholder who
may have a right to require Saratoga to purchase his or her shares for cash as
a result of making such a demand (as described below), a notice that the
required shareholder approval of the merger agreement and the transactions
contemplated thereby, including the merger, was obtained (the "Notice of
Approval") accompanied by a copy of sections 1300 through 1304 of the
California General Corporation Law. The Notice of Approval will set forth the
price determined by Saratoga to represent the "fair market value" of any
Dissenting Shares (which shall constitute an offer by Saratoga to purchase such
Dissenting Shares at such stated price) and will set forth a brief description
of the procedures to be followed by such shareholders who wish to exercise
their dissenters' rights.

                                       58
<PAGE>

   Within 30 days after the date on which the Notice of Approval was mailed:
(1) Saratoga or its transfer agent must receive the demand of the dissenting
shareholder which is required by law to contain a statement concerning the
number and class of shares held of record by such dissenting shareholder which
the dissenting shareholder demands that Saratoga purchase and a statement of
what such dissenting shareholder claims to be the "fair market value" of the
Dissenting Shares as of August 27, 1999, the day before the announcement of the
proposed merger (the statement of "fair market value" in such demand by the
dissenting shareholder constitutes an offer by the dissenting shareholder to
sell the Dissenting Shares at such price); and (2) the dissenting shareholder
must submit share certificate(s) representing the Dissenting Shares to Saratoga
at its principal office or at the office of the transfer agent for Saratoga.
The certificate(s) will be stamped or endorsed with a statement that the shares
are Dissenting Shares or will be exchanged for certificates of appropriate
denomination so stamped or endorsed. If the price contained in the Notice of
Approval is acceptable to the dissenting shareholder, the dissenting
shareholder may demand the same price. This would constitute an acceptance of
the offer by Saratoga to purchase the dissenting shareholder's stock at the
price stated in the Notice of Approval.

   If Saratoga and a dissenting shareholder agree upon the price to be paid for
the Dissenting Shares, upon the dissenting shareholder's surrender of the
certificates representing the Dissenting Shares, such price (together with
interest thereon at the legal rate on judgments from the date of the agreement
between Saratoga and the dissenting shareholder) is required by law to be paid
to the dissenting shareholder within 30 days after such agreement or within 30
days after any statutory or contractual conditions to the merger are satisfied,
whichever is later, subject to the surrender of the certificates therefor.

   If Saratoga and a dissenting shareholder disagree as to the price for such
Dissenting Shares or disagree as to whether such Dissenting Shares are entitled
to be classified as Dissenting Shares, such holder may, within six months after
the Notice of Approval is mailed, file a complaint in the Superior Court of the
proper county requesting the court to make such determination or,
alternatively, may intervene in any pending action brought by any other
dissenting shareholder. Costs of such an action (including compensation of
appraisers) are required to be assessed as the court considers equitable, but
must be assessed against Saratoga if the appraised value as determined by the
court exceeds the price offered by Saratoga.

   The court action to determine the fair market value of the shares will be
suspended if litigation is instituted to test the sufficiency or regularity of
the votes of the shareholders in authorizing the merger. Furthermore, no
shareholder who has appraisal rights under Chapter 13 of the California General
Corporation Law has any right to attack the validity of the merger or to have
the merger set aside or rescinded except in an action to test whether the
number of shares required to authorize or approve the merger has been legally
voted in favor of the merger.

   Dissenting Shares may lose their status as such and the right to demand
payment will terminate if (1) the merger is abandoned (in which case Saratoga
shall pay on demand to any dissenting shareholder who has initiated proceedings
in good faith as provided under Chapter 13 of the California General
Corporation Law all necessary expenses and reasonable attorneys' fees incurred
in such proceedings); (2) the Dissenting Shares are transferred before being
submitted for endorsement or are surrendered for conversion into shares of
another class; (3) the dissenting shareholder and Saratoga do not agree upon
the status of the shares as Dissenting Shares or upon the price of such shares
and the dissenting shareholder fails to file suit against Saratoga or intervene
in a pending action within six months following the date on which the Notice of
Approval was mailed to the shareholder; or (4) the dissenting shareholder
withdraws his or her demand for the purchase of the Dissenting Shares with the
consent of Saratoga.

                                       59
<PAGE>

                         UNAUDITED PRO FORMA CONDENSED
                         COMBINED FINANCIAL INFORMATION

   The following Unaudited Pro Forma Condensed Combined Balance Sheet as of
September 30, 1999, combines the historical consolidated balance sheets of SJNB
and Saratoga as if the merger had been effective on September 30, 1999, after
giving effect to certain adjustments. These adjustments are based on estimates.
The Unaudited Pro Forma Condensed Combined Statements of Operations for the
nine months ended September 30, 1999 and 1998 and for the years ended December
31, 1998, 1997 and 1996 present the combined results of operations of SJNB and
Saratoga as if the merger had been effective at the beginning of each period.
The Unaudited Pro Forma Condensed Combined Financial Information has been
prepared from, and should be read in conjunction with, the historical
consolidated financial statements and notes thereto of SJNB and Saratoga.

   The Unaudited Pro Forma Condensed Combined Financial Information and
accompanying notes reflect the application of the pooling of interests method
of accounting for the merger. Under this method of accounting, the recorded
assets, liabilities, shareholders' equity, income and expenses of SJNB and
Saratoga are combined and reflected at their historical amounts.

   The pro forma combined figures shown in the Unaudited Pro Forma Condensed
Combined Financial Information are simply arithmetical combinations of SJNB's
and Saratoga's separate financial results; you should not assume that SJNB and
Saratoga would have achieved the pro forma combined results if they had
actually been combined during the periods presented.

   The combined company expects to incur merger and other non-recurring
expenses as a result of the merger and to achieve merger benefits in the form
of operating cost savings. The pro forma earnings, which do not reflect any
direct costs or potential savings which are expected to result from the
consolidation of the operations of SJNB and Saratoga, are not indicative of the
results of future operations. No assurances can be given with respect to the
ultimate level of expense savings. For further explanation about these risks,
read the information under "Information Regarding Forward-Looking Statements"
and "Risk Factors."

                                       60
<PAGE>

                   SJNB Financial Corp. and Saratoga Bancorp
              Unaudited Pro Forma Condensed Combined Balance Sheet
                            As of September 30, 1999
                                 (in thousands)

<TABLE>
<CAPTION>
                                                                      SJNB and
                                                                      Saratoga
                                        SJNB    Saratoga  Adjustments Combined
Assets                                --------  --------  ----------- --------
<S>                                   <C>       <C>       <C>         <C>
Cash and due from banks.............  $ 14,937  $  5,561        --    $ 20,498
Federal Funds sold..................     1,300    24,600    $(1,864)    24,036
Money market investments............     8,445       --         --       8,445
Interest bearing deposits in other
 banks..............................       --      1,792        --       1,792
Investment securities:
 Available for sale.................    52,890    31,424        --      84,314
 Held to maturity...................    10,165    10,586        --      20,751
                                      --------  --------    -------   --------
  Total investment securities.......    63,055    42,010        --     105,065
                                      --------  --------    -------   --------
Loans and leases....................   310,641    66,745        --     377,386
Allowance for possible loan and
 lease losses.......................    (5,152)     (840)       --      (5,992)
                                      --------  --------    -------   --------
 Loans and leases, net..............   305,489    65,905        --     371,394
                                      --------  --------    -------   --------
Premises and equipment, net.........     3,608     4,530        --       8,138
Accrued interest receivable.........     2,289       804        --       3,093
Intangibles, net of accumulated
 amortization of $2,506.............     3,731       --         --       3,731
Other assets........................     4,657     6,496        --      11,153
                                      --------  --------    -------   --------
  Total Assets......................  $407,511  $151,698    $(1,864)  $557,345
                                      ========  ========    =======   ========

Liabilities and Shareholders' Equity
Deposits:
 Noninterest-bearing................  $ 64,935  $ 24,639        --    $ 89,574
 Interest-bearing...................   272,283    87,746        --     360,029
                                      --------  --------    -------   --------
  Total deposits....................   337,218   112,385        --     449,603
                                      --------  --------    -------   --------
Short-term borrowings...............    29,057       --         --      29,057
Other borrowings....................       702    22,571        --      23,273
Accrued interest payable............     1,102       299        --       1,401
Other liabilities...................     4,322     1,370    $   573      6,265
                                      --------  --------    -------   --------
  Total liabilities.................   372,401   136,625        573    509,599
                                      --------  --------    -------   --------
Shareholders' equity:
 Common stock.......................    13,917     4,434        --      18,351
 Retained earnings..................    21,609    11,184     (2,437)    30,356
 Accumulated other comprehensive
  loss..............................      (416)     (545)       --        (961)
                                      --------  --------    -------   --------
  Total shareholders' equity........    35,110    15,073     (2,437)    47,746
                                      --------  --------    -------   --------
Commitments and contingencies.......       --        --         --         --
                                      --------  --------    -------   --------
  Total Liabilities and
   Shareholders' Equity.............  $407,511  $151,698    $(1,864)  $557,345
                                      ========  ========    =======   ========
</TABLE>

   See accompanying Notes to Unaudited Pro Forma Condensed Combined Financial
                                  Statements.

                                       61
<PAGE>

                   SJNB Financial Corp. and Saratoga Bancorp
         Unaudited Pro Forma Condensed Combined Statement of Operations
               For the Nine Month Period Ended September 30, 1999
                    (in thousands, except per share amounts)

<TABLE>
<CAPTION>
                                                                       SJNB and
                                                                       Saratoga
                                          SJNB    Saratoga Adjustments Combined
                                         -------  -------- ----------- --------
<S>                                      <C>      <C>      <C>         <C>
Interest income:
 Interest and fees on loans and leases.. $20,950  $ 5,170      --      $26,120
 Interest and dividends on investment
  securities............................   2,902    2,374      --        5,276
 Other interest and investment income...     (34)      80      --           46
                                         -------  -------     ----     -------
   Total interest income................  23,818    7,624      --       31,442
                                         -------  -------     ----     -------
Interest expense:
 Interest on deposits...................   7,502    2,384      --        9,886
 Other short-term borrowings............     367      --       --          367
 Interest on long-term borrowings.......     --     1,017      --        1,017
                                         -------  -------     ----     -------
   Total interest expense...............   7,869    3,401      --       11,270
                                         -------  -------     ----     -------
   Net interest income..................  15,949    4,223      --       20,172
                                         -------  -------     ----     -------
 Provision for possible loan and lease
  losses................................     250       66      --          316
                                         -------  -------     ----     -------
   Net interest income after provision
    for possible loan and lease losses..  15,699    4,157      --       19,856
                                         -------  -------     ----     -------
Other income:
 Service charges on deposits............     603      208      --          811
 Other operating income.................     510      704      --        1,214
 Net gain (loss) on securities available
  for sale..............................     (51)     --       --          (51)
                                         -------  -------     ----     -------
   Total other income...................   1,062      912      --        1,974
                                         -------  -------     ----     -------
Other expenses:
 Salaries and benefits..................   5,749    1,014      --        6,763
 Occupancy..............................     683      287      --          970
 Amortization of intangibles............     342      --       --          342
 Other..................................   2,804    1,510      --        4,314
                                         -------  -------     ----     -------
   Total other expenses.................   9,578    2,811      --       12,389
                                         -------  -------     ----     -------
   Income before income taxes...........   7,183    2,258      --        9,441
 Income taxes...........................   2,979      824      --        3,803
                                         -------  -------     ----     -------
   Net income........................... $ 4,204  $ 1,434      --      $ 5,638
                                         =======  =======     ====     =======
Net income per share--basic............. $  1.77  $  0.90      --      $  1.62
                                         =======  =======     ====     =======
Net income per share--diluted........... $  1.68  $  0.80      --      $  1.50
                                         =======  =======     ====     =======
Average common shares outstanding--
 basic..................................   2,371    1,594     (478)      3,487
                                         =======  =======     ====     =======
Average common share equivalents
 outstanding--diluted...................   2,499    1,782     (535)      3,746
                                         =======  =======     ====     =======
</TABLE>

   See accompanying Notes to Unaudited Pro Forma Condensed Combined Financial
                                  Statements.

                                       62
<PAGE>

                   SJNB Financial Corp. and Saratoga Bancorp
         Unaudited Pro Forma Condensed Combined Statement of Operations
               For the Nine Month Period Ended September 30, 1998
                    (in thousands, except per share amounts)

<TABLE>
<CAPTION>
                                                                       SJNB and
                                                                       Saratoga
                                          SJNB    Saratoga Adjustments Combined
                                         -------  -------- ----------- --------
<S>                                      <C>      <C>      <C>         <C>
Interest income:
  Interest and fees on loans and
   leases............................... $18,404   $4,759      --      $23,163
  Interest and dividends on investment
   securities...........................   3,546    2,463      --        6,009
  Other interest and investment income..      (7)     107      --          100
                                         -------   ------     ----     -------
    Total interest income...............  21,943    7,329      --       29,272
                                         -------   ------     ----     -------
Interest expense:
  Interest on deposits..................   6,593    2,224      --        8,817
  Other short-term borrowings...........     246      --       --          246
  Interest on long-term borrowings......     --     1,058      --        1,058
                                         -------   ------     ----     -------
    Total interest expense..............   6,839    3,282      --       10,121
                                         -------   ------     ----     -------
    Net interest income.................  15,104    4,047      --       19,151
                                         -------   ------     ----     -------
  Provision for possible loan and lease
   losses...............................     150      136      --          286
                                         -------   ------     ----     -------
    Net interest income after provision
     for possible loan and lease
     losses.............................  14,954    3,911      --       18,865
                                         -------   ------     ----     -------
Other income:                                                  --
  Service charges on deposits...........     461      219      --          680
  Other operating income................     324      183      --          507
  Net gain (loss) on securities
   available for sale...................      (8)      91      --           83
                                         -------   ------     ----     -------
    Total other income..................     777      493      --        1,270
                                         -------   ------     ----     -------
Other expenses:
  Salaries and benefits.................   5,009      961      --        5,970
  Occupancy.............................     564      301      --          865
  Amortization of intangibles...........     337      --       --          337
  Other.................................   2,534    1,010      --        3,544
                                         -------   ------     ----     -------
    Total other expenses................   8,444    2,272      --       10,716
                                         -------   ------     ----     -------
    Income before income taxes..........   7,287    2,132      --        9,419
  Income taxes..........................   3,046      810      --        3,856
                                         -------   ------     ----     -------
    Net income.......................... $ 4,241   $1,322      --      $ 5,563
                                         =======   ======     ====     =======
Net income per share--basic............. $  1.70   $ 0.80      --      $  1.53
                                         =======   ======     ====     =======
Net income per share--diluted........... $  1.61   $ 0.72      --      $  1.42
                                         =======   ======     ====     =======
Average common shares outstanding--
 basic..................................   2,492    1,644     (493)      3,643
                                         =======   ======     ====     =======
Average common share equivalents
 outstanding--diluted...................   2,638    1,824     (547)      3,915
                                         =======   ======     ====     =======
</TABLE>

   See accompanying Notes to Unaudited Pro Forma Condensed Combined Financial
                                  Statements.

                                       63
<PAGE>

                   SJNB Financial Corp. and Saratoga Bancorp
         Unaudited Pro Forma Condensed Combined Statement of Operations
                      For the year ended December 31, 1998
                    (in thousands, except per share amounts)

<TABLE>
<CAPTION>
                                                                       SJNB and
                                                                       Saratoga
                                          SJNB    Saratoga Adjustments Combined
                                         -------  -------- ----------- --------
<S>                                      <C>      <C>      <C>         <C>
Interest income:
  Interest and fees on loans and
   leases............................... $24,858   $6,394      --      $31,252
  Interest and dividends on investment
   securities...........................   4,482    3,186      --        7,668
  Other interest and investment income..      (9)     169      --          160
                                         -------   ------     ----     -------
    Total interest income...............  29,331    9,749      --       39,080
                                         -------   ------     ----     -------
Interest expense:
  Interest on deposits..................   8,766    3,001      --       11,767
  Other short-term borrowings...........     312      --       --          312
  Interest on long-term borrowings......     --     1,399      --        1,399
                                         -------   ------     ----     -------
    Total interest expense..............   9,077    4,400      --       13,477
                                         -------   ------     ----     -------
    Net interest income.................  20,254    5,349      --       25,603
                                         -------   ------     ----     -------
  Provision for possible loan and lease
   losses...............................     300      136      --          436
                                         -------   ------     ----     -------
    Net interest income after provision
     for possible loan and lease
     losses.............................  19,954    5,213      --       25,167
                                         -------   ------     ----     -------
Other income:
  Service charges on deposits...........     659      291      --          950
  Other operating income................     404      320      --          724
  Net gain (loss) on securities
   available for sale...................      (4)     154      --          150
                                         -------   ------     ----     -------
    Total other income..................   1,059      765      --        1,824
                                         -------   ------     ----     -------
Other expenses:
  Salaries and benefits.................   6,787    1,261      --        8,048
  Occupancy.............................     775      398      --        1,173
  Amortization of intangibles...........     457      --       --          457
  Other.................................   3,478    1,306      --        4,784
                                         -------   ------     ----     -------
    Total other expenses................  11,497    2,965      --       14,462
                                         -------   ------     ----     -------
    Income before income taxes..........   9,516    3,013      --       12,529
  Income taxes..........................   3,975    1,065      --        5,040
                                         -------   ------     ----     -------
    Net income.......................... $ 5,541   $1,948      --      $ 7,489
                                         =======   ======     ====     =======
Net income per share--basic............. $  2.23   $ 1.19      --      $  2.06
                                         =======   ======     ====     =======
Net income per share--diluted........... $  2.11   $ 1.07      --      $  1.92
                                         =======   ======     ====     =======
Average common shares outstanding--
 basic..................................   2,484    1,644     (493)      3,635
                                         =======   ======     ====     =======
Average common share equivalents
 outstanding--diluted...................   2,627    1,822     (547)      3,902
                                         =======   ======     ====     =======
</TABLE>

   See accompanying Notes to Unaudited Pro Forma Condensed Combined Financial
                                  Statements.

                                       64
<PAGE>

                   SJNB Financial Corp. and Saratoga Bancorp
         Unaudited Pro Forma Condensed Combined Statement of Operations
                      For the year ended December 31, 1997
                    (in thousands, except per share amounts)

<TABLE>
<CAPTION>
                                                                       SJNB and
                                                                       Saratoga
                                          SJNB    Saratoga Adjustments Combined
                                         -------  -------- ----------- --------
<S>                                      <C>      <C>      <C>         <C>
Interest income:
  Interest and fees on loans and
   leases............................... $22,732   $5,571      --      $28,303
  Interest and dividends on investment
   securities...........................   4,515    3,745      --        8,260
  Other interest and investment income..      (9)      30      --           21
                                         -------   ------     ----     -------
    Total interest income...............  27,238    9,346      --       36,584
                                         -------   ------     ----     -------
Interest expense:
  Interest on deposits..................   7,995    2,921      --       10,916
  Other short-term borrowings...........     754      --       --          754
  Interest on long-term borrowings......     --     1,352      --        1,352
                                         -------   ------     ----     -------
    Total interest expense..............   8,749    4,273      --       13,022
                                         -------   ------     ----     -------
    Net interest income.................  18,489    5,073      --       23,562
                                         -------   ------     ----     -------
  Provision for possible loan and lease
   losses...............................     705      --       --          705
                                         -------   ------     ----     -------
    Net interest income after provision
     for possible loan and lease
     losses.............................  17,784    5,073      --       22,857
                                         -------   ------     ----     -------
Other income:
  Service charges on deposits...........     607      273      --          880
  Other operating income................     453      170      --          623
  Net gain (loss) on securities
   available for sale...................     (47)      34      --          (13)
                                         -------   ------     ----     -------
    Total other income..................   1,013      477      --        1,490
                                         -------   ------     ----     -------
Other expenses:
  Salaries and benefits.................   5,725    1,338      --        7,063
  Occupancy.............................     725      372      --        1,097
  Amortization of intangibles...........     473      --       --          473
  Other.................................   2,987    1,268      --        4,255
                                         -------   ------     ----     -------
    Total other expenses................   9,910    2,978      --       12,888
                                         -------   ------     ----     -------
    Income before income taxes..........   8,887    2,572      --       11,459
  Income taxes..........................   3,773      976      --        4,749
                                         -------   ------     ----     -------
    Net income.......................... $ 5,114   $1,596      --      $ 6,710
                                         =======   ======     ====     =======
Net income per share--basic............. $  2.04   $ 1.01      --      $  1.86
                                         =======   ======     ====     =======
Net income per share--diluted........... $  1.94   $ 0.92      --      $  1.74
                                         =======   ======     ====     =======
Average common shares outstanding--
 basic..................................   2,508    1,573     (472)      3,609
                                         =======   ======     ====     =======
Average common share equivalents
 outstanding--diluted...................   2,640    1,728     (518)      3,850
                                         =======   ======     ====     =======
</TABLE>


   See accompanying Notes to Unaudited Pro Forma Condensed Combined Financial
                                  Statements.

                                       65
<PAGE>

                   SJNB Financial Corp. and Saratoga Bancorp
         Unaudited Pro Forma Condensed Combined Statement of Operations
                      For the year ended December 31, 1996
                    (in thousands, except per share amounts)

<TABLE>
<CAPTION>
                                                                       SJNB and
                                                                       Saratoga
                                          SJNB    Saratoga Adjustments Combined
                                         -------  -------- ----------- --------
<S>                                      <C>      <C>      <C>         <C>
Interest income:
  Interest and fees on loans and
   leases............................... $20,422   $4,395      --      $24,817
  Interest and dividends on investment
   securities...........................   4,114    3,180      --        7,294
  Other interest and investment income..      (9)      10      --            1
                                         -------   ------     ----     -------
    Total interest income...............  24,527    7.585      --       32,112
                                         -------   ------     ----     -------
Interest expense:
  Interest on deposits..................   6,600    2.713      --        9,313
  Other short-term borrowings...........   1,459      --       --        1,459
  Interest on long-term borrowings......     --       845      --          845
                                         -------   ------     ----     -------
    Total interest expense..............   8,059    3,558      --       11,617
                                         -------   ------     ----     -------
    Net interest income.................  16,468    4,027      --       20,495
                                         -------   ------     ----     -------
  Provision for possible loan and lease
   losses...............................     190     (150)     --           40
                                         -------   ------     ----     -------
    Net interest income after provision
     for possible loan and lease
     losses.............................  16,278    4,177      --       20,455
                                         -------   ------     ----     -------
Other income:
  Service charges on deposits...........     551      199      --          750
  Other operating income................     437      154      --          591
  Net gain (loss) on securities
   available for sale...................    (142)     --       --         (142)
                                         -------   ------     ----     -------
    Total other income..................     846      353      --        1,199
                                         -------   ------     ----     -------
Other expenses:
  Salaries and benefits.................   5,517    1,342      --        6,859
  Occupancy.............................     702      348      --        1,050
  Amortization of intangibles...........     499     ----      --          499
  Other.................................   2,917    1,180      --        4,097
                                         -------   ------     ----     -------
    Total other expenses................   9,635    2,870      --       12,505
                                         -------   ------     ----     -------
    Income before income taxes..........   7,489    1,660      --        9,149
  Income taxes..........................   3,198      559      --        3,757
                                         -------   ------     ----     -------
    Net income.......................... $ 4,291   $1,101      --      $ 5,392
                                         =======   ======     ====     =======
Net income per share--basic............. $  1.73   $ 0.71      --      $  1.51
                                         =======   ======     ====     =======
Net income per share--diluted........... $  1.64   $ 0.64      --      $  1.41
                                         =======   ======     ====     =======
Average common shares outstanding--
 basic..................................   2,481    1,551     (465)      3,567
                                         =======   ======     ====     =======
Average common share equivalents
 outstanding--diluted...................   2,622    1,726     (518)      3,830
                                         =======   ======     ====     =======
</TABLE>


   See accompanying Notes to Unaudited Pro Forma Condensed Combined Financial
                                  Statements.

                                       66
<PAGE>

      Notes to Unaudited Pro Forma Condensed Combined Financial Statements

(1) Market Value of Investment Securities Held to Maturity

   The market value of Investment Securities Held to Maturity as of September
30, 1999 is as follows (in thousands):

<TABLE>
     <S>                                                                 <C>
     SJNB............................................................... $10,075
     Saratoga...........................................................   9,474
                                                                         -------
     Total.............................................................. $19,940
                                                                         =======
</TABLE>

(2) Common Stock

   Common stock outstanding as of September 30, 1999 is as follows together
with the pro forma combined, calculated on the basis of 0.70 shares of SJNB
common stock to one share of Saratoga common stock (in thousands).

<TABLE>
     <S>                                                                   <C>
     SJNB................................................................. 2,353
     Saratoga............................................................. 1,587
     Pro forma combined................................................... 3,464
</TABLE>

(3) Merger Costs

   The following table reflects all nonrecurring SJNB and Saratoga estimated
merger-related costs as of September 30, 1999. These costs are not included on
the unaudited pro forma condensed combined statements of operations but are
included on the unaudited pro forma condensed combined balance sheet as a
reduction to shareholders' equity, net of a $462,000 tax benefit. These costs
will be charged to expense immediately following the consummation of the
merger. These estimated merger-related costs are summarized below, in
thousands:

<TABLE>
<CAPTION>
                                                               Merger Costs
                                                           --------------------
                                                           SJNB Saratoga Total
                                                           ---- -------- ------
     <S>                                                   <C>  <C>      <C>
     Financial advisory................................... $ 50  $  600  $  650
     Professional fees....................................  275     250     525
     Printing.............................................   50      25      75
     Termination and severance benefits...................  --      827     827
     Deferred compensation................................  --      702     702
     Other................................................  --      120     120
                                                           ----  ------  ------
                                                           $375  $2,524  $2,899
                                                           ====  ======
     Estimated Tax benefit................................                 (462)
                                                                         ------
       Total..............................................               $2,437
                                                                         ======
</TABLE>

                                       67
<PAGE>

                     MARKET PRICE AND DIVIDEND INFORMATION

Market Quotations

   The SJNB common stock is listed and traded on the Nasdaq National Market.
The Saratoga common stock is quoted on the OTC Bulletin Board. As of October
22, 1999, there were approximately 749 holders of record of SJNB common stock
and approximately 253 holders of record of Saratoga common stock.

   The following table sets forth for SJNB common stock and Saratoga common
stock the high and low closing prices and per share cash dividends declared for
the quarters indicated.

<TABLE>
<CAPTION>
                                        SJNB                  Saratoga
                               ----------------------- -----------------------
                               Common Stock            Common Stock
                               ------------- Dividends ------------- Dividends
                                High   Low   Declared   High   Low   Declared
                               ------ ------ --------- ------ ------ ---------
   <S>                         <C>    <C>    <C>       <C>    <C>    <C>
     1997
   First Quarter.............. $26.00 $18.75    --     $10.00 $ 8.00    --
   Second Quarter.............  26.00  22.50   $.21     11.00   9.67   $.07
   Third Quarter..............  32.25  24.75    --      12.67  10.50    --
   Fourth Quarter.............  42.00  30.75    .24     12.17  10.83    .07

     1998
   First Quarter.............. $37.00 $33.50   $.14    $15.33 $12.75   $.07
   Second Quarter.............  43.25  35.00    .14     17.33  14.33    --
   Third Quarter..............  43.25  26.00    .14     17.25  13.88    .10
   Fourth Quarter.............  29.00  26.00    .14     14.50  13.00    --

     1999
   First Quarter.............. $28.50 $26.00   $.14    $17.00 $14.00   $.10
   Second Quarter.............  30.25  26.50    .14     17.75  15.88    --
   Third Quarter..............  34.50  31.00    .14     21.88  17.38    .10
   Fourth Quarter (through
    October 26)...............  31.13  30.00    --      20.50  20.00    --
</TABLE>

   At the close of business on August 27, 1999, immediately prior to the first
public announcement of the merger, the high, low and closing prices for SJNB
common stock on the Nasdaq National Market were $33.25, $33.125 and $33.25,
respectively.

   At the close of business on August 27, 1999, immediately prior to the first
public announcement of the merger, the high, low and last reported sale prices
for Saratoga common stock as quoted on the OTC Bulletin Board were $19.00,
$18.875 and $19.00, respectively.

Dividends and Dividend Policy

   SJNB. SJNB's board of directors considers the advisability and amount of
proposed dividends each year. Future dividends will be determined after
consideration of SJNB's earnings, financial condition, future capital funds,
regulatory requirements and such other factors as the board of directors may
deem relevant. SJNB's primary source of funds for payment of dividends to its
shareholders will be receipt of dividends and management fees from San Jose
National Bank. The payment of dividends by a bank is subject to various legal
and regulatory restrictions.

   From 1993 through 1997, SJNB maintained a policy of paying semi-annual
dividends to its shareholders. Effective with the first quarter of 1998, SJNB
adopted a policy to pay quarterly cash dividends to its shareholders. It is the
intention of SJNB to continue the payment of dividends, subject to financial
results and other factors which could limit or restrict dividends as more fully
discussed elsewhere herein.

   SJNB has paid cash dividends on its outstanding shares of common stock
totaling $0.45 per share in 1997, $0.56 per share in 1998 and $0.42 per share
through September 30, 1999. It is the intention of SJNB to pay cash dividends,
subject to the restrictions on the payment of cash dividends as described
above, depending upon the level of earnings, management's assessment of future
capital needs and other factors considered by the board of directors.

                                       68
<PAGE>

   Holders of SJNB common stock are entitled to receive dividends as and when
declared by the board of directors of SJNB out of funds legally available
therefor under the laws of the State of California. The California General
Corporation Law provides that a corporation may make a distribution to its
shareholders if the corporation's retained earnings equal at least the amount
of the proposed distribution. The California General Corporation Law further
provides that, in the event sufficient retained earnings are not available for
the proposed distribution, a corporation may nevertheless make a distribution
to its shareholders if, after giving effect to the distribution, it meets two
conditions, which generally stated are as follows: (i) the corporation's assets
must equal at least 125% of its liabilities; and (ii) the corporation's current
assets must equal at least its current liabilities or, if the average of the
corporation's earnings before taxes on income and before interest expense for
the two preceding fiscal years was less than the average of the corporation's
interest expense for such fiscal years, then the corporation's current assets
must equal at least 125% of its current liabilities.

   The Federal Reserve Board generally prohibits a bank holding company from
declaring or paying a cash dividend which would impose undue pressure on the
capital of subsidiary banks or would be funded only through borrowing or other
arrangements that might adversely affect a bank holding company's financial
position. The Federal Reserve Board's policy is that a bank holding company
should not continue its existing rate of cash dividends on its common stock
unless its net income is sufficient to fully fund each dividend and its
prospective rate of earnings retention appears consistent with its capital
needs, asset quality and overall financial condition.

   Under the merger agreement, SJNB is prohibited from declaring or paying any
dividends on or making other distributions in respect of any of its capital
stock, except (1) cash dividends in an amount substantially equivalent to
dividends paid in the 12 months prior to the date of the merger agreement and
(2) dividends paid to SJNB from a wholly-owned subsidiary. The merger agreement
also requires each party to coordinate with the other party the declaration of,
and record and payment dates for, any dividend in respect of its common stock.

   Saratoga. Saratoga's shareholders are entitled to receive dividends when and
as declared by its board of directors, out of funds legally available
therefore, subject to the restrictions set forth in the California General
Corporation Law noted above. Funds for payment of any cash dividends by
Saratoga would be obtained from its investments as well as dividends and/or
management fees from Saratoga National Bank.

   The payment of cash dividends by Saratoga National Bank may be subject to
the approval of the Office of the Comptroller of the Currency, as well as
restrictions established by federal banking law, the Federal Reserve Board and
the FDIC. Approval of the Office of the Comptroller of the Currency is required
if the total of all dividends declared by Saratoga National Bank's board of
directors in any calendar year will exceed Saratoga National Bank's net profits
for that year combined with its retained net profits for the preceding two
years, less any required transfers to surplus or to a fund for the retirement
of preferred stock. Additionally, the Federal Reserve Board, FDIC and/or Office
of the Comptroller of the Currency might, under certain circumstances, place
restrictions on the ability of a bank to pay dividends based upon peer group
averages and the performance and maturity of that bank.

   Saratoga has paid cash dividends on its outstanding shares of common stock
totaling $0.134 per share in 1997, $0.167 per share in 1998 and $0.10 per share
through September 30, 1999. Saratoga declared a $0.10 per share cash dividend
prior to September 30, 1999 effective to shareholders of record at October 22,
1999 and payable on November 5, 1999. It is the intention of Saratoga to pay
cash and stock dividends, subject to the restrictions on the payment of cash
dividends as described above, depending upon the level of earnings,
management's assessment of future capital needs and other factors considered by
the board of directors.

   Under the merger agreement, Saratoga is prohibited from declaring or paying
any dividends on or making other distributions in respect of any of its capital
stock, except (1) cash dividends in an amount per share not greater than, and
consistent with the manner and frequency of, dividends paid in the 12 months
prior to the date of the merger agreement and (2) dividends paid to Saratoga
from Saratoga National Bank. The merger agreement also requires each party to
coordinate with the other party the declaration of, and record and payment
dates for, any dividend in respect of its common stock.

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                        COMPARISON OF SHAREHOLDER RIGHTS

General

   SJNB and Saratoga are both incorporated under and subject to the provisions
of the California General Corporation Law.

   Upon consummation of the merger, except for those persons, if any, who
perfect appraisal rights under the California General Corporation Law (see
"Dissenters' Rights of Appraisal"), the shareholders of Saratoga will become
shareholders of SJNB.

   SJNB is a California corporation and, accordingly, is governed by the
California General Corporation Law and by its Articles of Incorporation (the
"SJNB Articles") and Bylaws (the "SJNB Bylaws"). While Saratoga is also
governed by the California General Corporation Law, its Articles of
Incorporation (the "Saratoga Articles") and Bylaws (the "Saratoga Bylaws")
differ in certain material respects from the SJNB Articles and SJNB Bylaws.

   The following is a general comparison of certain similarities and material
differences between the rights of SJNB and Saratoga shareholders under their
respective governing Articles of Incorporation and Bylaws. This discussion is
only a summary of certain provisions and does not purport to be a complete
description of such similarities and differences, and is qualified in its
entirety by reference to the California General Corporation Law, the common law
thereunder and the full text of the SJNB Articles, SJNB Bylaws, Saratoga
Articles and Saratoga Bylaws.

Certain Anti-Takeover Measures

   Some of the provisions in the SJNB Articles and the SJNB Bylaws discussed
below may deter efforts to obtain control of SJNB on a basis which some
shareholders might deem favorable. Such provisions are designed to encourage
any person attempting a change in control of SJNB to enter into negotiations
with the board of directors of SJNB. For example, the SJNB Articles contain a
"Classified Board" provision, creating classes of directors with terms expiring
at different times. See "--Classified Board Provisions." In addition, the SJNB
board of directors is authorized to issue preferred stock which may have the
effect of delaying or preventing a change in control of SJNB. See "Description
of SJNB Capital Stock--Preferred Stock." The foregoing anti-takeover measures
may decrease the likelihood that a person or group would obtain control of SJNB
or may perpetuate incumbent management.

   The provisions in the Saratoga Articles permitting the issuance of preferred
stock discussed under the caption "Description of Saratoga Capital Stock--
Preferred Stock" may deter efforts to obtain control of Saratoga on a basis
which some shareholders might deem favorable as further discussed below.

Quorum Requirements

   Both the SJNB Bylaws and the Saratoga Bylaws provide that the presence in
person or by proxy of the holders of a majority of the shares entitled to vote
at any meeting of the shareholders shall constitute a quorum for the
transaction of business.

Indemnification of Directors and Executive Officers

   Overview of California Law. Section 317 of the California General
Corporation Law expressly grants to each California corporation the power to
indemnify its directors, officers and agents against certain liabilities and
expenses incurred in the performance of their duties. Rights to indemnification
beyond those provided by Section 317 may be valid to the extent that such
rights are authorized in the corporation's articles of incorporation.
Indemnification may not be made, however, with respect to liability incurred in
connection with any of the following acts for which the liability of directors
may not be limited under the California General

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Corporation Law: (1) acts or omissions that involve intentional misconduct or a
knowing and culpable violation of law; (2) acts or omissions that a director
believes to be contrary to the best interests of the corporation or its
shareholders or that involve the absence of good faith on the part of the
director; (3) any transaction from which a director derived a personal benefit;
(4) acts or omissions that show a reckless disregard for the director's duty to
the corporation or its shareholders in circumstances in which the director was
aware, or should have been aware, in the ordinary course of performing a
director's duties, of a risk of serious injury to the corporation or its
shareholders; (5) acts or omissions that constitute an unexcused pattern of
inattention that amounts to an abdication of the director's duty to the
corporation or its shareholders; (6) acts or omissions arising out of certain
interested party transactions; or (7) acts in connection with illegal
distributions, loans or guarantees.

   With respect to all proceedings other than shareholder derivative actions,
Section 317 permits a California corporation to indemnify any of its directors,
officers or other agents only if such person acted in good faith and in a
manner such person reasonably believed to be in the best interests of the
corporation and, in the case of a criminal proceeding, had no reasonable cause
to believe the conduct of such person was unlawful. In the case of derivative
actions, a California corporation may indemnify any of its directors, officers
or agents only if such person acted in good faith and in a manner such person
believed to be in the best interests of the corporation and its shareholders.
Furthermore, in derivative actions, no indemnification is permitted (1) with
respect to any matter with respect to which the person to be indemnified has
been held liable to the corporation, unless such indemnification is approved by
the court; (2) of amounts paid in settling or otherwise disposing of a pending
action without court approval; or (3) of expenses incurred in defending a
pending action which is settled or otherwise disposed of without court
approval. To the extent that a director, officer or agent of a corporation has
been successful on the merits in defense of any proceeding for which
indemnification is permitted by Section 317, a corporation is obligated by
Section 317 to indemnify such person against expenses actually and reasonably
incurred by him in connection with the proceeding.

   SJNB. The SJNB Articles eliminate the liability of its directors for
monetary damages to the fullest extent permissible under California law and
grant to SJNB the power to indemnify its directors, officers and agents through
agreements with such persons, bylaw provisions, vote of shareholders or
disinterested directors, or otherwise, in excess of the indemnification
otherwise permitted by Section 317, subject to applicable statutory
prohibitions upon indemnification.

   The SJNB Bylaws obligate SJNB to indemnify to the maximum extent permitted
by California General Corporation Law its directors, officers and other agents
against liabilities and expenses incurred in the performance of their duties,
subject to the prohibitions of the California General Corporation Law.

   SJNB maintains directors' and officers' liability insurance policies that
indemnify its directors and officers against certain losses in connection with
claims made against them for certain wrongful acts. In addition, SJNB has
entered into separate indemnification agreements with its directors and
officers that require SJNB, among other things, to indemnify them against
certain liabilities that may arise by reason of their status or service as
agents of SJNB to the maximum extent permitted by the California General
Corporation Law.

   The SJNB Bylaws and indemnification agreements with its directors entitle
the directors of SJNB to be indemnified against liabilities and expenses
actually and reasonably incurred in connection with any proceeding arising by
reason of the fact that any such person is or was an agent of SJNB. SJNB
directors have been granted the right to be paid by SJNB the expenses incurred
in defending the proceedings specified above in advance of their final
disposition.

   Saratoga. The Saratoga Articles eliminate the liability of its directors for
monetary damages to the fullest extent permissible under California law and
authorize Saratoga to provide indemnification of agents (as defined in Section
317 of the California General Corporation Law) for breach of duty to Saratoga
and its shareholders through bylaw provisions or through agreements with the
agents, or both, in excess of the indemnification provisions otherwise
permitted by Section 317 of the California General Corporation Law,

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subject to the limits on such excess indemnification set forth in Section 204
of the California General Corporation Law. Saratoga also maintains directors'
and officers' liability insurance policies that indemnify its directors and
officers against certain losses in connection with claims made against them for
certain wrongful acts.

   The Saratoga Bylaws and indemnification agreements provide to Saratoga
directors, officers and other agents the maximum indemnification allowed under
applicable California law and under the Saratoga Articles. The indemnification
agreements provide indemnification which expands the scope of indemnification
provided by California law. It has not yet been determined, however, to what
extent the indemnification expressly permitted by California law may be
expanded, and, therefore, the validity and scope of indemnification provided by
the indemnification agreements may be subject to future judicial
interpretation. Any award of indemnification to a director, officer or other
agent would come directly from the assets of Saratoga, thereby affecting a
shareholder's investment.

   The indemnification agreements incorporate the provisions of the Saratoga
Bylaws regarding indemnification and set forth a number of procedural and
substantive matters which are not addressed or are addressed in less detail in
the California law including the following:

  . The indemnification agreements establish a standard of conduct that the
    person to be indemnified must have acted "in a manner such person did not
    believe to be contrary to the best interests of the corporation." This
    standard is an expansion of the standard under California law that the
    person must have acted "in a manner such person reasonably believed to be
    in the best interests of the corporation."

  . The indemnification agreements establish the presumption that the
    indemnified party has met the applicable standard of conduct required for
    indemnification. In addition, an arbitrator may make the determination
    that indemnification is proper in any arbitration proceeding in which
    such determination is pending. California law requires a finding in each
    specific case by the board of directors, independent legal counsel or the
    shareholders that the applicable standard of conduct has been met.

  . The indemnification agreements provide that litigation expenses shall be
    advanced to an indemnified party at his or her request provided that he
    or she undertakes to repay the amount advanced if it is ultimately
    determined that he or she is not entitled to indemnification for such
    expenses. California law provides that such expenses may be advanced
    against such an undertaking upon authorization by the board of directors.

  . The indemnification agreements explicitly provide that in a derivative
    suit the indemnified party will be entitled to indemnification against
    amounts paid in settlement, to the fullest extent permitted by law, where
    the indemnified party meets the applicable standard of conduct.
    Indemnification of any such amount would be paid out of Saratoga's funds.
    California law does not provide for such indemnification without court
    approval. The enforceability of the provisions in the indemnification
    agreements providing for settlement payments in derivative suits has not
    been judicially interpreted by the courts and may be subject to public
    policy limitations.

  . In the event Saratoga does not pay a requested indemnification amount,
    the indemnification agreements allow the indemnified party to contest
    this determination by petitioning a court to make an independent
    determination of whether the party is entitled to indemnification under
    the indemnification agreements. In the event of such a contest, the
    burden of proving that the indemnified party did not meet the applicable
    standard of conduct will be on Saratoga. If Saratoga fails to establish
    that the applicable standard of conduct has not been met, the indemnified
    party will be entitled to indemnification, which will include
    reimbursement for expenses incurred by the indemnified party in such
    contest in establishing the right to indemnification. California law does
    not set forth any procedure for contesting a corporation's determination
    of a party's right to indemnification or establish which party bears the
    burden of proof with respect to a challenge to such a determination.

  . The indemnification agreements explicitly provide for partial
    indemnification of costs and expenses in the event that an indemnified
    party is not entitled to full indemnification under the terms of the

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    indemnification agreements. California law does not specifically address
    this issue. It does, however, provide that to the extent that an
    indemnified party has been successful on the merits, he or she shall be
    entitled to such indemnification.

  . The indemnification agreements automatically incorporate future changes
    in the laws which increase the protection available to the indemnitee.
    Such changes will apply to Saratoga without further shareholder approval
    and may further impair shareholders' rights or subject Saratoga's assets
    to risk of loss in the event of large indemnification claims. Each
    indemnification agreement constitutes a binding, legal obligation of
    Saratoga, and may not be amended without the consent of the individual
    who is protected by such indemnification agreement.

  . The indemnification agreements explicitly provide that actions by an
    indemnified party serving at the request of Saratoga as a director,
    officer or agent of an employee benefit plan, corporation, partnership,
    joint venture or other enterprise, whether or not owned or controlled by
    Saratoga, shall be covered by the indemnification. California law
    provides that a corporation may so indemnify such parties. It should be
    noted that by agreeing by contract to indemnify those parties, Saratoga
    may be exposed to liability for actions of an entity over which it may
    not exercise control, which liability could adversely affect Saratoga's
    financial position.

  . The indemnification agreements, together with the limitation on the
    director's liability and the indemnification provided by the Saratoga
    Articles and Saratoga Bylaws, reduce significantly the number of
    instances in which directors might be held liable to Saratoga for
    monetary damages for breach of their fiduciary duties.

   Under the merger agreement, from and after the effective time of the merger
SJNB will indemnify and hold harmless each present or former officer or
director of Saratoga and Saratoga National Bank (determined as of the effective
time) against (1) all losses, claims, damages, expenses, liabilities or
judgments or amounts that are paid in the settlement of or in connection with
any claim, action, suit, proceeding or investigation based on or arising out of
the fact that such person is or was a director or officer of Saratoga or
Saratoga National Bank (collectively, "Indemnified Liabilities") and (2) all
Indemnified Liabilities based on or arising out of the merger agreement or the
transactions contemplated by the merger agreement, in each case to the full
extent that Saratoga would have been permitted under applicable law and its
articles of incorporation and SJNB is permitted under California law.

   Additionally, upon the effective time of the merger, SJNB will include in
its director and officer insurance policy any executive officer or director of
Saratoga or Saratoga National Bank who becomes an officer or director of SJNB.
Saratoga has agreed to cooperate with SJNB to obtain extended coverage under
Saratoga's director and officer insurance policy to cover claims made for a
period of three years after the effective time of the merger regarding acts or
omissions of Saratoga's or Saratoga National Bank's directors or officers prior
to the effective time of the merger. However, SJNB will not be obligated to
make annual premium payments for such insurance to the extent such premiums
exceed 150% of the premiums paid by Saratoga and Saratoga National Bank in
respect of 1998 for such insurance, as previously disclosed to SJNB. If the
premiums for such insurance would at any time exceed 150% of the premiums paid
by Saratoga and Saratoga National Bank in respect of 1998 for such insurance,
then SJNB will maintain policies of insurance which, in SJNB's good faith
determination, provide the maximum coverage available at an annual premium
equal to 150% of the premiums paid by Saratoga and Saratoga National Bank in
respect of 1998 for such insurance. Notwithstanding the indemnification rights
described above, the officers and directors of Saratoga and Saratoga National
Bank will retain all indemnification rights and benefits they have under
agreements in effect on the date of the merger agreement. SJNB has agreed to
honor those agreements with respect to any acts or omissions by such officers
or directors occurring prior to the closing of the merger.

   Overview of Federal Law. Federal law authorizes the FDIC to limit, by
regulation or order, the payment of indemnification by insured banks or bank
holding companies to their directors and officers. Pursuant to this authority,
the FDIC has enacted a regulation that permits the payment of indemnification
by banks and bank

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holding companies to institution-affiliated directors, officers and other
parties only if certain requirements are satisfied. This regulation permits an
institution to make an indemnification payment to, or for the benefit of, a
director, officer or other party only if the institution's board of directors,
in good faith, certifies in writing that the individual has a substantial
likelihood of prevailing on the merits and that the payment of indemnification
will not adversely affect the institution's safety and soundness. An
institution's board of directors is obligated to cease making or authorizing
indemnification payments in the event that it believes, or reasonably should
believe, that the conditions discussed in the preceding sentence are no longer
being met. Further, an institution's board of directors must provide the FDIC
and any other appropriate bank regulatory agency with prior written notice of
any authorization of indemnification. In addition, indemnification payments
related to an administrative proceeding or civil action instituted by an
appropriate federal bank regulatory agency are limited to the payment or
reimbursement of reasonable legal or other professional expenses. Finally, the
director, officer or other party must agree in writing to reimburse the
institution for any indemnification payments received should the proceeding
result in a final order being instituted against the individual assessing a
civil money penalty, removing the individual from office, or requiring the
individual to cease and desist from certain institutional activities.

Shareholder Meetings and Action by Written Consent

   The Saratoga Bylaws provide for shareholder action by written consent,
including the requirement for unanimous written consent for the election of
directors other than to fill vacancies. The SJNB Articles authorize shareholder
action by written consent only when first authorized by the board of directors.
Additionally, both the SJNB Bylaws and the Saratoga Bylaws permit a director to
be elected at any time to fill a vacancy on the board of directors that has not
been filled by the directors by the written consent of the holders of a
majority of the outstanding shares entitled to vote for the election of
directors.

Cumulative Voting

   Cumulative voting allows a shareholder to cast a number of votes equal to
the number of directors to be elected multiplied by the number of shares held
in the shareholder's name on the record date. SJNB shareholders are not
entitled to cumulative voting in the election of directors. Saratoga
shareholders are entitled to cumulative voting in the election of directors.

Amendment of Bylaws

   SJNB. The SJNB Bylaws may be amended or repealed by the affirmative vote or
written consent of a majority of the outstanding shares entitled to vote. The
SJNB Bylaws require that if the SJNB Articles set forth the number of
authorized directors of SJNB, the authorized number of directors may be changed
only by an amendment of the SJNB Articles. The SJNB Articles currently set
forth a permissible range of authorized directors of between nine and 17.
Subject to the rights of shareholders to amend the bylaws, the SJNB Bylaws
provide that the bylaws may be adopted, amended or repealed by its board of
directors.

   Saratoga. The Saratoga Bylaws may be amended or repealed by the affirmative
vote or written consent of a majority of the outstanding shares entitled to
vote, provided that any amendment which reduces (1) the number of directors on
a fixed-number board or (2) the minimum number of directors on a variable-
number board to a number less than five, cannot be adopted if the votes cast or
consents given opposing such action are equal to or more than 16 2/3% of all
outstanding shares entitled to vote.

   Subject to the rights of shareholders to amend the bylaws, the Saratoga
Bylaws provide that the bylaws may be adopted, amended or repealed by its board
of directors, except that only the shareholders can adopt a bylaw or amendment
to the bylaws which (1) specifies or changes the number of directors on a fixed
number board, (2) specifies or changes the minimum or maximum number of
directors on a variable number board or (3) changes from a fixed number board
to a variable number board or vice versa.

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Filling Vacancies on the Board of Directors

   Both the SJNB Bylaws and the Saratoga Bylaws provide that vacancies
occurring on their respective boards of directors may be filled by a vote of a
majority of the remaining directors, though less than a quorum, or by a sole
remaining director, except that a vacancy created by the removal of a director
may only be filled by the vote of a majority of the shares entitled to vote
represented at a duly held meeting or by unanimous written consent of the
outstanding shares entitled to vote. Both the SJNB Bylaws and the Saratoga
Bylaws also provide that the shareholders may elect a director at any time to
fill any vacancy not filled by the directors, except that any election by
written consent, other than to fill a vacancy created by removal of a director,
requires the consent of a majority of the outstanding shares entitled to vote.

   In addition, the California General Corporation Law provides that if, after
the filling of any vacancy by the directors, the directors then in office who
have been elected by the shareholders constitute less than a majority of the
directors then in office, (1) any holder or holders of an aggregate of 5% or
more of the total number of shares at the time outstanding having the right to
vote for such directors may call a special meeting of shareholders; or (2) the
California Superior Court of the proper county shall, upon application of such
shareholder or shareholders, summarily order a special meeting of shareholders,
to be held to elect the entire Board of Directors.

Call of Annual or Special Meeting of Shareholders and Action by Shareholders
Without a Meeting

   Both the SJNB Bylaws and the Saratoga Bylaws provide that a special meeting
of the shareholders may be called at any time by their board of directors,
chairman of the board, president or one or more shareholders holding shares in
the aggregate entitled to cast not less than 10% of the votes at that meeting.
Under the California General Corporation Law, unless otherwise provided in the
articles of incorporation (which, in the case of the SJNB Articles and the
Saratoga Articles, is not provided), any action which may be taken at any
annual or special meeting may be taken without a meeting and without prior
notice, if a consent in writing, setting forth the action so taken, is signed
by the holders of outstanding shares having not less than the minimum number of
votes that would be necessary to authorize or take such action at a meeting at
which all shares entitled to vote thereon were present and voted. The SJNB
Articles provide that action without a meeting cannot be taken unless the board
of directors of SJNB has by resolution approved any such action without a
meeting.

Classified Board Provisions

   SJNB. The SJNB Articles provide that, in the event that the authorized
number of directors shall be fixed at nine or more, the board shall be divided
into three classes: Class I, Class II and Class III, each consisting of a
number of directors equal to as nearly as practicable one-third the total
number of directors. Directors in Class I, Class II and Class III shall
initially serve for a term expiring respectively at the 2000, 2001 and 2002
annual meeting of shareholders. Thereafter, each director shall serve for a
term ending at the third annual shareholders meeting following the annual
meeting at which such director was elected. In the event that the authorized
number of directors shall be fixed with at least six but less than nine, the
Board shall be divided into two classes, designated as Class I and Class II,
each consisting of one-half of the directors or as close an approximation as
possible. At each annual meeting, each of the successors to the directors of
the class whose term shall have expired at such annual meeting shall be elected
for a term running until the second annual meeting next succeeding his or her
election and until his or her successor shall have been duly elected and
qualified. The number of directors is currently set between nine and 17. The
use of a classified board may have the effect of discouraging takeover
attempts.

   Saratoga. Neither the Saratoga Articles nor the Saratoga Bylaws provide for
a classified board. The Saratoga Bylaws provide that the number of authorized
directors shall be not less than five nor more than twelve, unless and until
such provisions are amended by a vote of Saratoga shareholders. The Saratoga
Bylaws further specify that directors shall be elected at each annual meeting
of shareholders, and shall continue in office until their respective successors
are elected and qualified.

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                       DESCRIPTION OF SJNB CAPITAL STOCK

   The authorized capital stock of SJNB consists of 20,000,000 shares of SJNB
common stock, without par value, and 5,000,000 shares of preferred stock,
without par value. As of October 22, 1999, 2,352,431 shares of SJNB common
stock and no shares of preferred stock were outstanding and an additional
156,887 shares of the authorized SJNB common stock were available for future
grant and reserved for issuance to holders of outstanding stock options under
SJNB's stock option plans.

Common Stock

   Holders of SJNB common stock are entitled to one vote for each share held of
record on all matters submitted to a vote of shareholders. Shareholders may not
cumulate their votes. Shareholders are entitled to receive ratably such
dividends as may be legally declared by SJNB's board of directors. There are
legal and regulatory restrictions on the ability of SJNB to declare and pay
dividends. See "Market Price and Dividend Information--Dividends and Dividend
Policy." In the event of a liquidation, common shareholders are entitled to
share ratably in all assets remaining after payment of liabilities and
liquidation preference for securities with a priority over the SJNB common
stock. Shareholders of SJNB common stock have no preemptive or conversion
rights. SJNB common stock is not subject to calls or assessments. The transfer
agent and registrar for SJNB common stock is U.S. Stock Transfer Corporation.

Preferred Stock

   The SJNB board of directors is authorized to fix the rights, preferences,
privileges and restrictions of the preferred stock and may establish series of
such stock and determine the variations between series. If and when any
preferred stock is issued, the holders of preferred stock may have a preference
over holders of SJNB common stock upon the payment of dividends, upon
liquidation of SJNB, in respect of voting rights and in the redemption of the
capital stock of SJNB. The issuance of any preferred stock may have the effect
of delaying, deferring or preventing a change in control of SJNB without
further action of its shareholders. The issuance of such stock with voting and
conversion rights may adversely affect the voting power of the holders of SJNB
common stock. SJNB has no present plans to issue any shares of preferred stock.

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                     DESCRIPTION OF SARATOGA CAPITAL STOCK

   The authorized capital stock of Saratoga consists of 20,000,000 shares of
common stock, without par value, and 1,000,000 shares of preferred stock,
without par value. As of the October 22, 1999, there were 1,588,950 shares of
Saratoga common stock and no shares of Saratoga preferred stock outstanding,
and an additional 115,921 shares of the authorized Saratoga common stock
available for future grant and reserved for issuance to holders of outstanding
stock options under Saratoga's stock option plan.

Common Stock

   Holders of Saratoga common stock are entitled to one vote for each share
held of record on all matters submitted to a vote of shareholders, except that
under the Saratoga Bylaws, shareholders may cumulate their votes for the
election of directors. Shareholders are entitled to receive ratably such
dividends as may be legally declared by Saratoga's board of directors. There
are legal and regulatory restrictions on the ability of Saratoga to declare and
pay dividends. See "Market Price and Dividend Information--Dividends and
Dividend Policy." In the event of a liquidation, common shareholders are
entitled to share ratably in all assets remaining after payment of liabilities
and liquidation preferences for securities with a priority over the Saratoga
common stock. Shareholders of Saratoga common stock have no preemptive or
conversion rights. Saratoga common stock is not subject to calls or
assessments. The transfer agent and registrar for Saratoga common stock is
ChaseMellon Shareholder Services LLC.

Preferred Stock

   The Saratoga board of directors is authorized to determine or alter the
rights, preferences, privileges and restrictions of the preferred stock and may
establish series of such stock, fix the number of shares of each series and
determine the variations between series. If and when any preferred stock is
issued, the holders of preferred stock may have a preference over holders of
Saratoga common stock upon the payment of dividends, upon liquidation of
Saratoga, in respect of voting rights and in the redemption of the capital
stock of Saratoga. The issuance of any preferred stock may have the effect of
delaying, deferring or preventing a change in control of Saratoga without
further action of its shareholders. The issuance of such stock with voting and
conversion rights may adversely affect the voting power of the holders of
Saratoga common stock. Saratoga has no present plans to issue any shares of
preferred stock and is prohibited from doing so by the merger agreement.

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                                    EXPERTS

   The Consolidated Financial Statements of SJNB incorporated in this joint
proxy statement/prospectus by reference from SJNB's annual report on Form 10-K,
as amended, for the year ended December 31, 1998 have been audited by KPMG LLP,
independent auditors, as stated in their report which is incorporated herein by
reference. Such statements have been so incorporated in reliance upon the
report of such firm given upon their authority as experts in accounting and
auditing.

   The Consolidated Financial Statements of Saratoga incorporated in this joint
proxy statement/prospectus by reference from Saratoga's annual report on Form
10-K, as amended, for the year ended December 31, 1998 have been audited by
Deloitte & Touche LLP, independent auditors, as stated in their report which is
incorporated herein by reference. Such statements have been so incorporated in
reliance upon the report of such firm given upon their authority as experts in
accounting and auditing.

                                 LEGAL MATTERS

   The validity of the shares of SJNB common stock offered hereby and certain
legal matters in connection with the merger will be passed upon for SJNB by
Pillsbury Madison & Sutro LLP, San Francisco, California.

                            SOLICITATION OF PROXIES

   Each of SJNB and Saratoga will bear the cost of the solicitation of proxies
from their respective shareholders. In addition to solicitation by mail, the
directors, officers and employees of SJNB or Saratoga may solicit proxies from
their respective shareholders by telephone or telegram or in person. Such
persons will not be additionally compensated, but will be reimbursed for
reasonable out-of-pocket expenses incurred in connection with such
solicitation. Arrangements will also be made with brokerage firms, nominees,
fiduciaries and other custodians, for the forwarding of solicitation materials
to the beneficial owners of shares held of record by such persons, and SJNB or
Saratoga, as applicable, will reimburse such persons for their reasonable out-
of-pocket expenses in connection therewith.

                      WHERE YOU CAN FIND MORE INFORMATION

   Both SJNB and Saratoga file annual, quarterly and current reports, proxy
statements and other information with the Securities and Exchange Commission.
You may read and copy any reports, statements or other information that SJNB
and Saratoga file at the Commission's public reference rooms in Washington,
D.C., New York, New York and Chicago, Illinois. You may also obtain copies of
this information by mail from the Public Reference Section of the SEC, 450 5th
Street, N.W., Room 1024, Washington, D.C. 20549 at prescribed rates. Please
call the Commission at (800) SEC-0330 for further information on the public
reference rooms. The Commission also maintains an Internet World Wide Web site
at "http://www.sec.gov" at which reports, proxy and information statements and
other information regarding SJNB and Saratoga are available. In addition,
reports, proxy statements and other information concerning SJNB also may be
inspected at the offices of The Nasdaq Stock Market, 1735 K Street, Washington,
D.C. 20006.

   SJNB has filed with the Securities and Exchange Commission a registration
statement on Form S-4 under the Securities Act relating to the shares of SJNB
common stock to be issued in connection with the merger. This joint proxy
statement/prospectus also constitutes the prospectus of SJNB filed as part of
the registration statement and does not contain all the information set forth
in the registration statement and exhibits thereto. You may copy and read the
registration statement and its exhibits at the public reference facilities
maintained by the Commission at the public reference rooms specified above.

                                       78
<PAGE>

   The Commission allows both SJNB and Saratoga to "incorporate by reference"
information into this joint proxy statement/prospectus, which means that SJNB
and Saratoga can disclose important information to you by referring you to
another document filed separately with the Commission. The information
incorporated by reference is deemed to be a part of this joint proxy
statement/prospectus, except for any information superseded by information
contained directly in this joint proxy statement/prospectus. This joint proxy
statement/ prospectus incorporates by reference the documents set forth below
that either SJNB or Saratoga has previously filed with the Commission. These
documents contain important information about SJNB and Saratoga and their
financial conditions.

<TABLE>
<CAPTION>
   SJNB Commission Filings
   (File No. 000-11771)                    Period
   <C>                                     <S>
   Annual Reports on Form 10-K............ Year ended December 31, 1998
   Quarterly Reports on Form 10-Q......... Quarters ended March 31, 1999, June
                                            30, 1999 and September 30, 1999
   Current Reports on Form 8-K............ Dated September 1, 1999
   Proxy Statement........................ Dated April 16, 1999

<CAPTION>
   Saratoga Commission Filings
   (File No. 002-77519-LA)
   <C>                                     <S>
   Annual Report on Form 10-K, as          Year ended December 31, 1998
    amended...............................
   Quarterly Reports on Form 10-Q......... Quarters ended March 31, 1999, June
                                            30, 1999 and September 30, 1999
   Current Reports on Form 8-K............ Dated March 3, 1999, May 4, 1999,
                                            May 21, 1999, September 1, 1999,
                                            September 24, 1999 and October 19,
                                            1999
</TABLE>

   SJNB and Saratoga incorporate by reference any additional documents that
either may file with the Commission between the date of this joint proxy
statement/prospectus and the date of their respective special meeting. These
include periodic reports, such as annual reports on Form 10-K, quarterly
reports on Form 10-Q and current reports on Form 8-K, as well as proxy
statements.

   SJNB has supplied all information contained or incorporated by reference in
the joint proxy statement/ prospectus relating to SJNB and Saratoga has
supplied all such information relating to Saratoga.

   This joint proxy statement/prospectus incorporates by reference documents
relating to SJNB and Saratoga which are not presented in this joint proxy
statement/prospectus or delivered herewith. Those documents relating to SJNB
are available from SJNB without charge, excluding all exhibits unless
specifically incorporated by reference in this joint proxy
statement/prospectus, by requesting them in writing or by telephone from SJNB
Financial Corp., Assistant Corporate Secretary, One North Market Street, San
Jose, California 95113, (408) 947-7562. Those documents relating to Saratoga
are available from Saratoga without charge, excluding all exhibits unless
specifically incorporated by reference in this joint proxy
statement/prospectus, by requesting them in writing or by telephone from
Saratoga Bancorp, Corporate Secretary, 12000 Saratoga-Sunnyvale Road, Saratoga,
California 95070, (408) 973-1111. If you would like to request documents from
either SJNB or Saratoga, please do so by December 6, 1999 in order to receive
them before the special meeting.

   In deciding how to vote on the merger, you should rely only on the
information contained or incorporated by reference in this joint proxy
statement/prospectus. Neither SJNB nor Saratoga has authorized any person to
provide you with any information that is different from what is contained in
this joint proxy statement/ prospectus. This joint proxy statement/prospectus
is dated October 29, 1999. You should not assume that the information contained
in this joint proxy statement/prospectus is accurate as of any date other than
such date, and neither the mailing to you of this joint proxy
statement/prospectus nor the issuance to you of shares of SJNB common stock
will create any implication to the contrary. This joint proxy statement/
prospectus does not constitute an offer to sell or a solicitation of any offer
to buy any securities, or the solicitation of a proxy in any jurisdiction in
which, or to any person to whom, it is unlawful.

                                       79
<PAGE>

                                                                         ANNEX A

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

                          AGREEMENT AND PLAN OF MERGER

                          dated as of August 27, 1999

                                     among

                             SJNB FINANCIAL CORP.,

                                SARATOGA BANCORP

                                      and

                             SARATOGA NATIONAL BANK


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

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                         Page
                                                                         ----
 <C>         <S>                                                         <C>
 ARTICLE I   THE MERGER................................................   A-1
    1.1      Effective Time of the Merger..............................   A-1
    1.2      Closing...................................................   A-1
    1.3      Effects of the Merger.....................................   A-2
    1.4      Alternative Structure.....................................   A-2
    1.5      Absence of Control........................................   A-3

 ARTICLE II  EFFECT OF THE MERGER ON THE CAPITAL STOCK OF THE
              CONSTITUENT CORPORATIONS; EXCHANGE OF CERTIFICATES.......   A-3
    2.1      Effect on Capital Stock of the Constituent Corporations...   A-3
             (a)Conversion of Saratoga Common Stock....................   A-3
             (b)SJNB Capital Stock.....................................   A-3
    2.2      No Further Ownership Rights in Saratoga Common Stock......   A-3
    2.3      Fractional Shares.........................................   A-3
    2.4      Surrender of Shares of Saratoga Common Stock..............   A-3
    2.5      Adjustments...............................................   A-4
    2.6      Options...................................................   A-5
    2.7      Dissenters' Rights........................................   A-5

 ARTICLE III REPRESENTATIONS AND WARRANTIES............................   A-5
    3.1      Representations and Warranties of Saratoga and SNB........   A-5
             (a)Organization, Standing and Power.......................   A-5
             (b)Capital Structure; Ownership of SJNB Common Stock......   A-6
             (c)Authority; No Violation................................   A-7
             (d)Financial Statements...................................   A-8
             (e)Saratoga SEC Documents.................................   A-9
             (f)Saratoga Information Supplied..........................   A-9
             (g)Compliance with Applicable Laws........................   A-9
             (h)Litigation.............................................  A-10
             (i)Taxes..................................................  A-10
             (j)Certain Agreements.....................................  A-11
             (k)Benefit Plans..........................................  A-12
             (l)Subsidiaries...........................................  A-13
             (m)Agreements with Bank or Other Regulators...............  A-13
             (n)Absence of Certain Changes or Events...................  A-13
             (o)Undisclosed Liabilities................................  A-14
             (p)Governmental Reports...................................  A-14
             (q)Environmental Liability................................  A-14
             (r)Properties.............................................  A-16
             (s)Transactions with Affiliates...........................  A-16
             (t)Brokers or Finders.....................................  A-16
             (u)Intellectual Property..................................  A-16
             (v)Pooling of Interests...................................  A-17
             (w)Opinion of Financial Advisor...........................  A-17
             (x)Community Reinvestment Act Compliance..................  A-17
             (y)Year 2000 Readiness....................................  A-17
             (z)Insurance..............................................  A-17
             (aa)Loans and Other Assets................................  A-18
             (ab)Restrictions on Investments...........................  A-18
             (ac)No Brokered Deposits..................................  A-19
</TABLE>

                                      A-i
<PAGE>

<TABLE>
<CAPTION>
                                                                          Page
                                                                          ----
 <C>        <S>                                                           <C>
            (ad)Derivatives Contracts; Structured Notes; Etc...........   A-19
            (ae)Labor Matters..........................................   A-19
    3.2     Representations and Warranties of SJNB.....................   A-19
            (a)Organization, Standing and Power........................   A-19
            (b)Capital Structure; Ownership of SJNB Common Stock.......   A-20
            (c)Authority; No Violation.................................   A-20
            (d)Financial Statements....................................   A-21
            (e)SJNB SEC Documents......................................   A-22
            (f)SJNB Information Supplied...............................   A-22
            (g)Compliance with Applicable Laws.........................   A-22
            (h)Litigation..............................................   A-22
            (i)Taxes...................................................   A-23
            (j)Certain Agreements......................................   A-23
            (k)Benefit Plans...........................................   A-24
            (l)Subsidiaries............................................   A-25
            (m)Agreements with Bank or Other Regulators................   A-26
            (n)Absence of Certain Changes or Events....................   A-26
            (o)Undisclosed Liabilities.................................   A-26
            (p)Governmental Reports....................................   A-26
            (q)Environmental Liability.................................   A-27
            (r)Properties..............................................   A-28
            (s)Transactions with Affiliates............................   A-28
            (t)No Broker or Finder.....................................   A-28
            (u)Intellectual Property...................................   A-28
            (v)Pooling of Interests....................................   A-28
            (w)Community Reinvestment Act Compliance...................   A-29
            (x)Year 2000 Readiness.....................................   A-29
            (y)Insurance...............................................   A-29
            (z)Loans and Other Assets..................................   A-29
            (aa)Derivatives Contracts; Structured Notes; Etc...........   A-30
            (ab)Labor Matters..........................................   A-30

 ARTICLE IV COVENANTS RELATING TO CONDUCT OF BUSINESS..................   A-31
    4.1     Covenants of Saratoga......................................   A-31
    4.2     Covenants of SJNB..........................................   A-33

 ARTICLE V  ADDITIONAL AGREEMENTS......................................   A-34
    5.1     Regulatory Matters.........................................   A-34
    5.2     Access to Information......................................   A-35
    5.3     Shareholders' Meetings.....................................   A-35
    5.4     No Solicitations...........................................   A-36
    5.5     Legal Conditions...........................................   A-38
    5.6     Employee Benefit Plans.....................................   A-38
    5.7     Indemnification; Directors' and Officers' Insurance........   A-39
    5.8     Additional Agreements......................................   A-40
    5.9     Fees and Expenses..........................................   A-40
    5.10    Cooperation................................................   A-41
    5.11    Affiliates.................................................   A-41
    5.12    Stock Exchange Listing.....................................   A-41
    5.13    Advice of Changes..........................................   A-41
    5.14    Subsequent Interim and Annual Financial Statements; Certain   A-41
            Reports....................................................
    5.15    Dissenters' Rights.........................................   A-41
</TABLE>

                                      A-ii
<PAGE>

<TABLE>
<CAPTION>
                                                                          Page
                                                                          ----
 <C>          <S>                                                         <C>
    5.16      SNB Board of Directors and Executive Officers............   A-41
    5.17      Transition Services......................................   A-42

 ARTICLE VI   CONDITIONS PRECEDENT.....................................   A-42
    6.1       Conditions to Each Party's Obligation....................   A-42
              (a)Shareholder Approvals.................................   A-42
              (b)Other Approvals.......................................   A-42
              (c)No Injunctions or Restraints..........................   A-42
              (d)NASDAQ National Market Listing........................   A-42
              (e)S-4...................................................   A-42
              (f)Pooling...............................................   A-42
              (g)Burdensome Condition..................................   A-43
              (h)Dissenters' Rights....................................   A-43
    6.2       Conditions to Obligations of SJNB........................   A-43
              (a)Representations and Warranties........................   A-43
              (b)Performance of Obligations............................   A-43
              (c)Corporate Action......................................   A-43
              (d)Tax Opinion...........................................   A-43
              (e)Material Adverse Effect...............................   A-44
              (f)Closing Documents.....................................   A-44
              (g)Bank Merger...........................................   A-44
              (h)Comfort Letter (S-4)..................................   A-44
              (i)Comfort Letter........................................   A-44
    6.3       Conditions to Obligations of Saratoga....................   A-44
              (a)Representations and Warranties........................   A-44
              (b)Performance of Obligations............................   A-44
              (c)Corporate Action......................................   A-44
              (d)Tax Opinion...........................................   A-44
              (e)Material Adverse Effect...............................   A-45
              (f)Closing Documents.....................................   A-45
              (g)Additions to SJNB Board of Directors..................   A-45
              (h)Fairness Opinion......................................   A-45
              (i)Comfort Letter (S-4)..................................   A-45
              (j)Comfort Letter........................................   A-45

 ARTICLE VII  TERMINATION AND AMENDMENT................................   A-45
    7.1       Termination..............................................   A-45
    7.2       Effect of Termination....................................   A-48
    7.3       Amendment................................................   A-48
    7.4       Extension; Waiver........................................   A-48

 ARTICLE VIII GENERAL PROVISIONS.......................................   A-48
    8.1       Survival of Representations, Warranties and Covenants....   A-48
    8.2       Notices..................................................   A-48
    8.3       Interpretation...........................................   A-49
    8.4       Counterparts.............................................   A-49
    8.5       Entire Agreement; No Third Party Beneficiaries; Rights of   A-49
              Ownership................................................
    8.6       Governing Law; Consent to Jurisdiction...................   A-50
    8.7       Severability.............................................   A-50
    8.8       Assignment...............................................   A-50
    8.9       Publicity................................................   A-50
    8.10      Attorneys' Fees..........................................   A-51
</TABLE>

                                     A-iii
<PAGE>

<TABLE>
 <C>          <S>
 Exhibit A:   Form of Agreement of Merger
 Exhibit B:   Form of Stock Option Agreement
 Exhibit C-1: Form of Affiliate Agreement (Saratoga)
 Exhibit C-2: Form of Affiliate Agreement (SJNB)
</TABLE>

                                      A-iv
<PAGE>

                             INDEX OF DEFINED TERMS

<TABLE>
<CAPTION>
                                                                           Page
                                                                           ----
<S>                                                                        <C>
Acquisition Event......................................................... A-37
Action.................................................................... A-51
Actual Expenses........................................................... A-40
Affiliate.................................................................  A-6
Agreement.................................................................  A-1
Agreement of Merger.......................................................  A-1
Average SJNB Closing Price................................................ A-47
Bank Merger...............................................................  A-1
Bank Regulators........................................................... A-10
Benefit Plans............................................................. A-12
BHC Act...................................................................  A-5
BIF.......................................................................  A-6
Burdensome Condition...................................................... A-43
Business Day..............................................................  A-2
CGCL......................................................................  A-1
Change in Control......................................................... A-38
Closing...................................................................  A-1
Closing Date..............................................................  A-2
Code......................................................................  A-1
Confidentiality Agreement................................................. A-35
Consents.................................................................. A-42
Constituent Corporations..................................................  A-2
CRA....................................................................... A-17
date hereof...............................................................  A-1
Derivatives Contract...................................................... A-19
Determination Date........................................................ A-47
Dissenting Shares.........................................................  A-5
DPC Shares................................................................  A-7
Effective Time............................................................  A-1
ERISA..................................................................... A-12
Exchange Act..............................................................  A-8
Exchange Agent............................................................  A-3
Exchange Ratio............................................................  A-3
FDIC......................................................................  A-6
Federal Reserve...........................................................  A-8
FFIEC..................................................................... A-17
GAAP......................................................................  A-9
Governmental Entity.......................................................  A-8
Indemnified Liabilities................................................... A-39
Indemnified Parties....................................................... A-39
Injunction................................................................ A-42
knowledge.................................................................  A-6
Litigation................................................................ A-10
material..................................................................  A-6
material adverse effect...................................................  A-6
Merger....................................................................  A-1
Minimum Price............................................................. A-47
NASDAQ.................................................................... A-47
OCC.......................................................................  A-8
</TABLE>

                                      A-v
<PAGE>

<TABLE>
<CAPTION>
                                                                           Page
                                                                           ----
<S>                                                                        <C>
OREO...................................................................... A-18
PBGC...................................................................... A-12
person....................................................................  A-6
Proxy Statement...........................................................  A-8
Representatives........................................................... A-36
Requisite Regulatory Approvals............................................ A-42
S-4....................................................................... A-21
Saratoga..................................................................  A-1
Saratoga Benefit Plans.................................................... A-12
Saratoga Certificates.....................................................  A-4
Saratoga Common Stock.....................................................  A-1
Saratoga Consolidated Financial Statements................................  A-8
Saratoga Designees........................................................  A-2
Saratoga Disclosure Schedule..............................................  A-7
Saratoga Intellectual Property............................................ A-16
Saratoga Option...........................................................  A-5
Saratoga Permits..........................................................  A-9
Saratoga Preferred Stock..................................................  A-6
Saratoga SEC Reports......................................................  A-9
Saratoga Shareholder Approval.............................................  A-7
Saratoga Shareholders' Meeting............................................  A-9
Saratoga Stock Option Plans...............................................  A-5
Saratoga's Current Premium................................................ A-40
SEC....................................................................... A-36
SEC Fees.................................................................. A-40
Securities Act............................................................  A-9
SFAS No. 5................................................................  A-6
Significant Subsidiary.................................................... A-36
SJNB......................................................................  A-1
SJNB Benefit Plans........................................................ A-24
SJNB Common Stock.........................................................  A-3
SJNB Consolidated Financial Statements.................................... A-21
SJNB Disclosure Schedule.................................................. A-20
SJNB Intellectual Property................................................ A-28
SJNB Permits.............................................................. A-22
SJNB Preferred Stock...................................................... A-20
SJNB SEC Reports.......................................................... A-22
SJNB Shareholder Approval................................................. A-20
SJNB Shareholders' Meeting................................................ A-22
SNB.......................................................................  A-1
SNB Common Stock..........................................................  A-1
Stock Option Agreement....................................................  A-1
Subsidiary................................................................  A-6
Superior Proposal......................................................... A-37
Surviving Corporation.....................................................  A-2
Takeover Proposal......................................................... A-36
tax....................................................................... A-11
Tax return................................................................ A-11
taxable................................................................... A-11
taxes..................................................................... A-11
Termination Fee........................................................... A-37
</TABLE>

                                      A-vi
<PAGE>

<TABLE>
<CAPTION>
                                                                           Page
                                                                           ----
<S>                                                                        <C>
to the best knowledge of..................................................  A-6
trading day............................................................... A-47
Transaction Agreements....................................................  A-6
Trust Account Shares......................................................  A-7
Violation.................................................................  A-8
Year 2000 Ready........................................................... A-17
</TABLE>

                                     A-vii
<PAGE>

   AGREEMENT AND PLAN OF MERGER (this "Agreement") dated as of August 27, 1999
(the "date hereof"), among SJNB FINANCIAL CORP., a California corporation
("SJNB"), SARATOGA BANCORP, a California corporation ("Saratoga"), and SARATOGA
NATIONAL BANK, a national banking association and a wholly-owned subsidiary of
Saratoga ("SNB").

   WHEREAS, Saratoga is the beneficial and record owner of 300,000 shares of
the issued and outstanding common stock, $5.00 par value per share (the "SNB
Common Stock"), of SNB, constituting all of the issued and outstanding shares
of SNB Common Stock;

   WHEREAS, the Board of Directors of SJNB has approved this Agreement,
declared it advisable and deems it advisable and in the best interests of the
shareholders of SJNB to consummate the transactions provided for herein in
which, inter alia, Saratoga would merge with and into SJNB pursuant to an
Agreement of Merger substantially in the form attached hereto as Exhibit A (the
"Merger");

   WHEREAS, the Boards of Directors of Saratoga and SNB have approved this
Agreement and declared it advisable and deem it advisable and in the best
interests of the shareholders of Saratoga and SNB to consummate the Merger;

   WHEREAS, it is the intention of the parties that the Merger qualify as a
tax-free reorganization pursuant to section 368(a) of the Internal Revenue Code
of 1986, as amended (the "Code"), and that the Merger shall be accounted for as
a "pooling of interests";

   WHEREAS, it is the intention of the parties that, immediately after
consummation of the Merger or, at the discretion of SJNB, as soon as reasonably
practicable thereafter, SNB shall be merged with and into San Jose National
Bank (the "Bank Merger"), and San Jose National Bank shall be the surviving
entity in the Bank Merger and shall continue as a wholly-owned Subsidiary (as
defined herein) of SJNB;

   WHEREAS, the Boards of Directors of SJNB, Saratoga and SNB have each
determined that the Merger and the other transactions contemplated by this
Agreement are consistent with, and will contribute to the furtherance of, their
respective business strategies and goals; and

   WHEREAS, as a condition and inducement to SJNB's willingness to enter into
this Agreement, SJNB and Saratoga are entering into a Stock Option Agreement
dated as of the date hereof in the form of Exhibit B hereto (the "Stock Option
Agreement") pursuant to which Saratoga has granted to SJNB an option to
purchase shares of the Common Stock, no par value, of Saratoga (the "Saratoga
Common Stock") constituting 19.9% of the outstanding shares of Saratoga Common
Stock.

   NOW, THEREFORE, in consideration of the foregoing and the respective
representations, warranties, covenants and agreements set forth herein, the
parties hereto agree as follows:

                                   ARTICLE I

                                   THE MERGER

   1.1 Effective Time of the Merger. Subject to the terms and conditions of
this Agreement, the Merger shall become effective upon the occurrence of the
filing of an agreement of merger in substantially the form of Exhibit A hereto
(the "Agreement of Merger") and officers' certificates prescribed by section
1103 of the California General Corporation Law ("CGCL") with the Secretary of
State of the State of California, or at such time thereafter as is provided by
mutual agreement in the Agreement of Merger (the "Effective Time").

   1.2 Closing. The closing of the Merger (the "Closing") will take place at
10:00 a.m., California time, on the first Friday which is at least ten Business
Days after receipt of all Requisite Regulatory Approvals and the expiration of
all requisite waiting periods (subject to the satisfaction of the condition set
forth in Section 6.1(a)), but in no event shall such date be later than March
31, 2000, unless otherwise agreed in writing

                                      A-1
<PAGE>

by the parties hereto or as provided in Section 7.1(c) (the "Closing Date").
The Closing shall be held at the offices of SJNB Financial Corp., One North
Market Street, San Jose, California 95113, or at such other location as is
agreed to in writing by the parties hereto. As used in this Agreement,
"Business Day" shall mean any day that is not a Saturday, Sunday or other day
on which banks are required or authorized by law to be closed in California.

   1.3 Effects of the Merger.

   (a) At the Effective Time (i) Saratoga shall be merged with and into SJNB
and the separate corporate existence of Saratoga shall cease, (ii) the Articles
of Incorporation of SJNB as in effect immediately prior to the Effective Time
shall be the Articles of Incorporation of the Surviving Corporation, (iii) the
By-laws of SJNB as in effect immediately prior to the Effective Time shall be
the By-laws of the Surviving Corporation, (iv) the directors of SJNB at the
Effective Time shall be the directors of the Surviving Corporation (except that
the Board of Directors of SJNB shall take all necessary action to appoint
Richard L. Mount and four other representatives of Saratoga (collectively, the
"Saratoga Designees"), mutually acceptable to SJNB and Saratoga, to serve on
the Surviving Corporation's board of directors as of and after the Effective
Time, with three of such Saratoga Designees to serve as Class I Directors and
one each of such Saratoga Designees to serve as a Class II Director and a Class
III Director of SJNB, such Saratoga Designees to serve as directors until the
earlier of their resignation or removal or until their respective successors
are duly elected and qualified, as the case may be; provided, however, that
Richard L. Mount shall remain a director of SJNB following any termination of
his employment with SJNB or its Subsidiaries; provided further that the Board
of Directors of SJNB or the nomination committee thereof shall nominate and
recommend the election of each of the five Saratoga Designees for reelection as
directors of SJNB at the conclusion of the term of their respective director
class as necessary in order that each such Saratoga Designee shall serve as an
SJNB director for at least three years after the Effective Time; provided
further, however, that in the event any such Saratoga Designee resigns, is
removed (other than by a vote of the shareholders of SJNB) or otherwise
terminates service, the remaining Saratoga Designees may select a former
Saratoga director as his or her replacement and SJNB shall nominate for
election such replacement so selected to serve as a director of SJNB for at
least the remainder of the term of the Saratoga Designee being replaced (as
such term may be required to be extended as provided in the second proviso
above)), (v) the officers of SJNB immediately prior to the Effective Time shall
be the officers of the Surviving Corporation, until the earlier of their
resignation or removal or until their respective successors are duly elected
and qualified, as the case may be, (vi) Richard L. Mount shall be appointed to
serve on the Executive Management Committee of SJNB, and (vii) each of the
Saratoga Designees will be appointed to serve on the Board of Directors of San
Jose National Bank until the earlier of his resignation or removal, until his
respective successor is duly elected and qualified or until he ceases to serve
as a member of the Board of Directors of SJNB.

   (b) As used in this Agreement, "Constituent Corporations" shall mean each of
SJNB and Saratoga, and "Surviving Corporation" shall mean SJNB, at and after
the Effective Time, as the surviving corporation in the Merger and SNB shall be
a subsidiary of SJNB.

   (c) At and after the Effective Time, the Merger will have the effects set
forth in the CGCL.

   1.4 Alternative Structure. Notwithstanding anything contained in this
Agreement to the contrary, upon receipt of Saratoga's prior written consent
(which consent shall not be unreasonably withheld), SJNB may specify, for any
reasonable business, tax or regulatory purpose, that, before the Merger, SJNB,
Saratoga and SNB shall enter into transactions other than those described
herein in order to effect the purposes of this Agreement, and the parties
hereto shall take all action necessary and appropriate to effect, or cause to
be effected, such transactions; provided, however, that no such specification
may (a) materially and adversely affect the timing of the consummation of the
transactions contemplated herein, or (b) adversely affect the economic
benefits, the form of consideration or the tax effect of the Merger to the
holders of Saratoga Common Stock.


                                      A-2
<PAGE>

   1.5 Absence of Control. Subject to any specific provisions of this
Agreement, it is the intent of the parties hereto that neither SJNB nor
Saratoga by reason of this Agreement shall be deemed (until consummation of the
transactions contemplated hereby) to control, directly or indirectly, the other
party and shall not exercise, or be deemed to exercise, directly or indirectly,
a controlling influence over the management or policies of such other party.

                                   ARTICLE II

          EFFECT OF THE MERGER ON THE CAPITAL STOCK OF THE CONSTITUENT
                     CORPORATIONS; EXCHANGE OF CERTIFICATES

   2.1 Effect on Capital Stock of the Constituent Corporations. At the
Effective Time, by virtue of the Merger and without any action on the part of
the holder of any shares of Saratoga or SJNB capital stock:

   (a) Conversion of Saratoga Common Stock. Subject to Sections 2.3, 2.5 and
7.1(h), each of the shares of Saratoga Common Stock issued and outstanding
immediately prior to the Effective Time (other than Dissenting Shares perfected
in accordance with Chapter 13 of the CGCL) shall be converted into the right to
receive 0.7 shares (the "Exchange Ratio") of fully paid and nonassessable
shares of Common Stock, no par value per share (the "SJNB Common Stock"), of
SJNB. All such shares of Saratoga Common Stock shall no longer be outstanding
and shall automatically be canceled and retired and shall cease to exist, and
each certificate previously representing any such shares shall thereafter
represent the right to receive (i) a certificate representing the number of
whole shares of SJNB Common Stock into which such Saratoga Common Stock has
been converted and, if applicable, (ii) cash in lieu of fractional shares as
provided in Section 2.3 hereof. Certificates previously representing shares of
Saratoga Common Stock shall be exchanged for certificates representing whole
shares of SJNB Common Stock issued in consideration therefor (and, if
applicable, cash in lieu of fractional shares as provided in Section 2.3
hereof) upon the surrender of such certificates.

   (b) SJNB Capital Stock. At and after the Effective Time, each share of SJNB
Common Stock issued and outstanding immediately prior to the Effective Time
shall remain an issued and outstanding share of capital stock of SJNB and shall
not be affected by the Merger.

   2.2 No Further Ownership Rights in Saratoga Common Stock. All shares of SJNB
Common Stock issued upon conversion of shares of Saratoga Common Stock in
accordance with the terms hereof shall be deemed to represent all rights
pertaining to such shares of Saratoga Common Stock, and, after the Effective
Time, there shall be no further registration of transfers on the stock transfer
books of Saratoga of the shares of Saratoga Common Stock which were outstanding
immediately prior to the Effective Time. If, after the Effective Time,
certificates formerly representing shares of Saratoga Common Stock are
presented to SJNB for any reason, they shall be canceled and, if applicable,
exchanged as provided in this Article II.

   2.3 Fractional Shares. Notwithstanding any other provision hereof, no
fractional shares of SJNB Common Stock shall be issued to holders of shares of
Saratoga Common Stock. In lieu thereof, each such holder entitled to a fraction
of a share of SJNB Common Stock (after taking into account all shares of
Saratoga Common Stock held at the Effective Time by such holder) shall receive,
at the time of surrender of the certificates representing such holder's
Saratoga Common Stock, an amount in cash equal to the Average SJNB Closing
Price, multiplied by the fraction of a share of SJNB Common Stock to which such
holder would otherwise be entitled. No such holder shall be entitled to
dividends, voting rights, interest on the value of, or any other rights in
respect of a fractional share.

   2.4 Surrender of Shares of Saratoga Common Stock.

   (a) Prior to the Effective Time, SJNB shall appoint U.S. Stock Transfer
Corp. or its successor, or any other bank or trust company (having capital of
at least $50 million) mutually acceptable to Saratoga and SJNB, as exchange
agent (the "Exchange Agent") for the purpose of exchanging certificates
representing the SJNB

                                      A-3
<PAGE>

Common Stock which are to be issued pursuant to Section 2.1, and at and after
the Effective Time, SJNB shall issue and deliver to the Exchange Agent
certificates representing the shares of SJNB Common Stock, as shall be required
to be delivered to holders of shares of Saratoga Common Stock pursuant to
Section 2.1 hereof. As soon as practicable after the Effective Time, each
holder of shares of Saratoga Common Stock converted pursuant to Section 2.1,
upon surrender to the Exchange Agent of one or more Saratoga share certificates
(the "Saratoga Certificates") for cancellation, will be entitled to receive a
certificate representing the number of shares of SJNB Common Stock determined
in accordance with Section 2.1 and a payment in cash with respect to fractional
shares, if any, determined in accordance with Section 2.3.

   (b) No dividends or other distributions of any kind which are declared
payable to shareholders of record of the shares of SJNB Common Stock after the
Effective Time will be paid to persons entitled to receive such certificates
for shares of SJNB Common Stock until such persons surrender their Saratoga
Certificates. Upon surrender of such Saratoga Certificate, the holder thereof
shall be paid, without interest, any dividends or other distributions with
respect to the shares of SJNB Common Stock as to which the record date and
payment date occurred on or after the Effective Time and on or before the date
of surrender.

   (c) If any certificate for shares of SJNB Common Stock is to be issued in a
name other than that in which the Saratoga Certificate surrendered in exchange
therefor is registered, it shall be a condition of such exchange that the
person requesting such exchange shall pay to the Exchange Agent any transfer
costs, taxes or other expenses required by reason of the issuance of
certificates for such shares of SJNB Common Stock in a name other than the
registered holder of the Saratoga Certificate surrendered, or such persons
shall establish to the satisfaction of SJNB and the Exchange Agent that such
costs, taxes or other expenses have been paid or are not applicable.

   (d) All dividends or distributions, and any cash to be paid in lieu of
fractional shares pursuant to Section 2.3, if held by the Exchange Agent for
payment or delivery to the holders of unsurrendered Saratoga Certificates
representing shares of Saratoga Common Stock and unclaimed at the end of one
year from the Effective Time, shall (together with any interest earned thereon)
at such time be paid or redelivered by the Exchange Agent to SJNB, and after
such time any holder of a Saratoga Certificate who has not surrendered such
Saratoga Certificate to the Exchange Agent shall, subject to applicable law,
look as a general creditor only to SJNB for payment or delivery of such
dividends or distributions or cash, as the case may be.

   (e) Neither SJNB nor the Surviving Corporation shall be liable to any holder
of Saratoga Common Stock for such shares (or dividends or distributions
thereon) or cash payable in lieu of fractional shares pursuant to Section 2.3
delivered to a public official pursuant to any applicable abandoned property,
escheat or similar law.

   2.5 Adjustments. In the event SJNB changes (or establishes a record date for
changing) the number of shares of SJNB Common Stock issued and outstanding
prior to the Effective Time as a result of an issuance of shares of SJNB Common
Stock, or a recapitalization, reclassification, split-up, combination,
exchange, readjustment, reorganization, merger, consolidation, distribution,
stock split, stock or other dividend, or similar transaction with respect to
the outstanding SJNB Common Stock and the record date therefor, if applicable,
shall be prior to the Effective Time, the Exchange Ratio shall be
proportionately adjusted with the result that the holders of Saratoga Common
Stock shall receive the same economic benefit set forth in Section 2.1.
Further, in the event SJNB, prior to the Effective Time, grants, issues,
delivers, sells or otherwise distributes any warrant, option, security, right
or other instrument convertible into or exchangeable for any shares of SJNB
Common Stock (collectively, an "SJNB Instrument"), then (i) the Exchange Ratio
shall be proportionately adjusted in the manner prescribed above as if the
shares of SJNB Common Stock issuable pursuant to such SJNB Instrument were
outstanding prior to the Effective Time or, (ii) in the sole discretion of
SJNB, SJNB shall provide, at or prior to the Effective Time, for the holders of
the Saratoga Common Stock whose shares are to be converted into shares of SJNB
Common Stock pursuant to the Merger proportionately equivalent SJNB Instruments
upon consummation of the Merger; provided, however, that no adjustment
hereunder shall be made for the grant of options under the SJNB 1996 Stock
Option Plan made by the Board of Directors of SJNB in its sole discretion; and
provided further, that no adjustment shall be made hereunder for any option
granted in

                                      A-4
<PAGE>

connection with a Takeover Proposal (as defined in Section 5.4(a)) to which
SJNB is a party (either as acquiror or target) and no adjustment shall be made
in the event that SJNB takes any action to authorize, approve or adopt a
shareholder rights plan in accordance with Section 4.2(a)(ii).

   2.6 Options. At the Effective Time, each option granted by Saratoga to
purchase shares of Saratoga Common Stock (each, an "Saratoga Option") which is
outstanding and unexercised immediately prior thereto shall cease to represent
a right to acquire shares of Saratoga Common Stock and shall be converted
automatically into an option to purchase shares of SJNB Common Stock in an
amount and at an exercise price determined as provided below (and otherwise
subject to the terms of the stock option plans of Saratoga (the "Saratoga Stock
Option Plans") and the agreements evidencing grants thereunder, including but
not limited to, the accelerated vesting of such options which shall occur in
connection with and by virtue of the consummation of the Merger as and to the
extent required by such plans and agreements): (a) the number of shares of SJNB
Common Stock to be subject to the new option shall be equal to the product of
the number of shares of Saratoga Common Stock subject to the original option
and the Exchange Ratio, provided that any fractional shares of SJNB Common
Stock resulting from such multiplication shall be rounded down to the nearest
share; and (b) the exercise price per share of SJNB Common Stock under the new
option shall be equal to the exercise price per share of Saratoga Common Stock
under the original option divided by the Exchange Ratio, provided that such
exercise price shall be rounded up to the nearest cent. In the case of any
options which are "incentive stock options" (as defined in section 422 of the
Code), the exercise price, the number of shares purchasable pursuant to such
options and the terms and conditions of exercise of such options shall be
determined in order to comply with section 424(a) of the Code. The duration and
other terms of the new option shall be the same as the original option except
that all references to Saratoga shall be deemed to be references to SJNB.

   2.7 Dissenters' Rights. Notwithstanding anything in this Agreement to the
contrary, shares of Saratoga Common Stock which are issued and outstanding
immediately prior to the Effective Time and which are held by shareholders that
have not voted such shares in favor of the Merger and have delivered a written
demand for the valuation of such shares in the manner provided in the CGCL
(such shares, the "Dissenting Shares") shall not be converted into or represent
the right to receive SJNB Common Stock as provided in Section 2.1 and the
holders thereof shall only be entitled to such rights as are granted by Chapter
13 of the CGCL. Each holder of Dissenting Shares that becomes entitled to
payment for such shares pursuant to Chapter 13 of the CGCL shall receive
payment therefor from the Surviving Corporation in accordance with the CGCL;
provided, however, that (i) if any such holder of Dissenting Shares shall have
failed to establish that such holder is entitled to dissenters' rights as
provided in Chapter 13 of the CGCL, or (ii) if any such holder of Dissenting
Shares shall have effectively withdrawn the demand for valuation of such shares
or lost the right to valuation and payment of such shares under Chapter 13 of
the CGCL, or (iii) if neither the Surviving Corporation nor such holder of
Dissenting Shares shall have filed a petition demanding a determination of the
value of all Dissenting Shares within the time provided in section 1309 of the
CGCL, such holder's or holders' (as the case may be) shares of Saratoga Common
Stock shall thereupon be deemed to have been converted, as of the Effective
Time, into and represent the right to receive from the Surviving Corporation
the shares of SJNB Common Stock as provided in Section 2.1 hereof.

                                  ARTICLE III

                         REPRESENTATIONS AND WARRANTIES

   3.1 Representations and Warranties of Saratoga and SNB. Each of Saratoga and
SNB hereby represent and warrant to SJNB as follows:

   (a) Organization, Standing and Power. Saratoga is a bank holding company
registered under the Bank Holding Company Act of 1956, as amended (the "BHC
Act"). SNB is a wholly owned Subsidiary of Saratoga and is a national banking
association organized under the laws of the United States. The deposit accounts
of

                                      A-5
<PAGE>

SNB are insured by the Bank Insurance Fund ("BIF") of the Federal Deposit
Insurance Corporation ("FDIC") to the fullest extent permitted by law, and all
premiums and assessments required in connection therewith have been paid when
due. Saratoga and each of its Subsidiaries is a bank or corporation duly
organized, validly existing and in good standing under the laws of its
jurisdiction of incorporation or organization, has all requisite power and
authority to own, lease and operate its properties and to carry on its business
as now being conducted and is duly qualified and in good standing to do
business in each jurisdiction in which the nature of its business or the
ownership or leasing of its properties makes such qualification necessary,
other than in such jurisdictions where the failure so to qualify would not,
either individually or in the aggregate, have a material adverse effect on
Saratoga. The Articles of Incorporation or Association and By-laws of each of
Saratoga, and each Subsidiary of Saratoga, copies of which were previously made
available to SJNB, are true, complete and correct. The minute books of Saratoga
and its Subsidiaries which have been made available to SJNB contain a complete
(except for certain portions thereof relating to the Merger and the
transactions contemplated hereby) and accurate record of all meetings of the
respective Boards of Directors (and committees thereof) and shareholders.

   As used in this Agreement,

      (i) the term "Subsidiary" when used with respect to any party means any
  corporation or other organization, whether incorporated or unincorporated,
  (x) of which such party or any other Subsidiary of such party is a general
  partner (excluding partnerships, the general partnership interests of which
  held by such party or any Subsidiary of such party do not have a majority
  of the voting interests in such partnership), or (y) at least a majority of
  the securities or other interests of which having by their terms ordinary
  voting power to elect a majority of the board of directors or others
  performing similar functions with respect to such corporation or other
  organization is directly or indirectly owned or controlled by such party or
  by any one or more of its Subsidiaries, or by such party and one or more of
  its Subsidiaries,

       (ii) any reference to any event, change or effect being "material"
  with respect to any entity means an event, change or effect which is
  material in relation to the condition (financial or otherwise), properties,
  assets, liabilities, businesses, results of operations or prospects of such
  entity and its Subsidiaries taken as a whole,

     (iii) the term "material adverse effect" means, with respect to any
  entity, a material adverse effect (whether or not required to be accrued or
  disclosed under Statement of Financial Accounting Standards No. 5 ("SFAS
  No. 5")) (A) on the condition (financial or otherwise), properties, assets,
  liabilities, businesses, results of operations or prospects of such entity
  and its Subsidiaries taken as a whole (but does not include any such effect
  resulting from or attributable to any action or omission by Saratoga or
  SJNB or any Subsidiary of either of them taken with the prior written
  consent of the other parties hereto, in contemplation of the transactions
  contemplated hereby), or (B) on the ability of such entity to perform its
  obligations under the Transaction Agreements (as defined below) on a timely
  basis,

       (iv) the term "Transaction Agreements" shall mean this Agreement, the
  Stock Option Agreement and the Agreement of Merger,

      (v) the term "knowledge" or "to the best knowledge of" a party hereto
  means the actual knowledge of a director or executive officer of a party
  after reasonable inquiry under all the circumstances,

       (vi) the term "Affiliate" means, as to any person, a person which
  controls, is controlled by or is under common control with such person, and

     (vii) the term "person" shall mean an individual, corporation,
  partnership, limited liability company, joint venture, association, trust,
  unincorporated organization or other entity.

   (b) Capital Structure; Ownership of SJNB Common Stock.

      (i) The authorized capital stock of Saratoga consists of 20,000,000
  shares of Saratoga Common Stock and 1,000,000 shares of preferred stock, no
  par value (the "Saratoga Preferred Stock"), of which

                                      A-6
<PAGE>

  (A) as of August 25, 1999, 1,586,588 shares of Saratoga Common Stock were
  outstanding (none having been issued thereafter except from the exercise of
  Saratoga Options) and (B) as of the date hereof, no shares of Saratoga
  Preferred Stock are outstanding. All outstanding shares of Saratoga Common
  Stock have been duly authorized and validly issued and are fully paid and
  non-assessable and not subject to preemptive rights.

       (ii) The authorized capital stock of SNB consists of 405,000 shares of
  SNB Common Stock of which 300,000 shares are outstanding. All outstanding
  shares of SNB Common Stock have been duly authorized and validly issued and
  are fully paid and non-assessable (except to the extent provided in the
  National Bank Act) and not subject to preemptive rights.

     (iii) Except for this Agreement and the Stock Option Agreement and
  except as set forth in Section 3.1(b)(iii) of the disclosure schedule of
  Saratoga delivered to SJNB on the date hereof (the "Saratoga Disclosure
  Schedule"), (A) there are no options, warrants, calls, rights, commitments
  or agreements of any character to which Saratoga or any of its Subsidiaries
  or Affiliates (as defined herein) is a party or by which any of the
  foregoing are bound obligating Saratoga or any of its Subsidiaries,
  including SNB, or Affiliates to issue, deliver or sell, or cause to be
  issued, delivered or sold, additional shares of capital stock of Saratoga
  or any of its Subsidiaries or obligating Saratoga or any of its
  Subsidiaries or Affiliates to grant, extend or enter into any such option,
  warrant, call, right, commitment or agreement, (B) there are no outstanding
  contractual obligations of Saratoga or any of its Subsidiaries or
  Affiliates to repurchase, redeem or otherwise acquire any shares of capital
  stock of Saratoga or any of its Subsidiaries and (C) there are no
  outstanding securities of any kind convertible into or exchangeable for the
  capital stock of Saratoga or any of its Subsidiaries (or any interest
  therein). Except as set forth in Section 3.1(b)(iii) of the Saratoga
  Disclosure Schedule, there is no agreement of any kind to which Saratoga or
  SNB is a party and, to the knowledge of Saratoga (without inquiry), no
  other agreement of any kind, in each case that gives any person any right
  to participate in the equity, value or income of, or to vote (x) in the
  election of directors or officers of, or (y) otherwise with respect to the
  affairs of, Saratoga or any of its Subsidiaries.

       (iv) Neither Saratoga nor any of its Subsidiaries or, to the best
  knowledge of Saratoga, its Affiliates, beneficially owns, directly or
  indirectly, any shares of capital stock of SJNB, securities of SJNB
  convertible into, or exchangeable for, such shares, or options, warrants or
  other rights to acquire such shares (regardless of whether such securities,
  options, warrants or other rights are then exercisable or convertible), nor
  is Saratoga or any of such Subsidiaries or Affiliates a party to any
  agreement, arrangement or understanding for the purpose of acquiring,
  holding, voting or disposing of shares of capital stock of SJNB or any such
  other securities, options, warrants or other rights.

      (v) No shares of Saratoga Common Stock are held directly or indirectly
  by Saratoga or its Subsidiaries in trust accounts, managed accounts and the
  like or otherwise held in a fiduciary or nominee capacity (any such shares,
  and shares of SJNB Common Stock which are similarly held, whether held
  directly or indirectly by Saratoga or SJNB or any of their respective
  Subsidiaries, as the case may be, being referred to herein as "Trust
  Account Shares") and no shares of Saratoga Common Stock are held by
  Saratoga or its Subsidiaries in respect of a debt previously contracted
  (any such shares and shares of SJNB Common Stock which are similarly held,
  whether held directly or indirectly by Saratoga or SJNB or any of their
  respective Subsidiaries, as the case may be, being referred to herein as
  "DPC Shares").

   (c) Authority; No Violation.

      (i) Each of Saratoga and SNB, as applicable, has all requisite
  corporate power and authority to enter into this Agreement and the other
  Transaction Agreements and to consummate the transactions contemplated
  hereby and thereby. The execution and delivery of this Agreement and the
  other Transaction Agreements and the consummation of the transactions
  contemplated hereby and thereby have been duly authorized by all necessary
  corporate action on the part of Saratoga and SNB, other than the approval
  of this Agreement and the Agreement of Merger by the holders of a majority
  of the outstanding shares of Saratoga Common Stock (the "Saratoga
  Shareholder Approval"). The Saratoga Shareholder Approval is

                                      A-7
<PAGE>

  the only vote of any class or series of Saratoga capital stock necessary to
  approve this Agreement and the other Transaction Agreements and the
  consummation of the transactions contemplated hereby and thereby. This
  Agreement and the other Transaction Agreements have been duly executed and
  delivered by each of Saratoga and SNB, as applicable, and (assuming due
  authorization, execution and delivery by SJNB) constitute the valid and
  binding obligations of each of Saratoga and SNB, as applicable, enforceable
  against each of Saratoga and SNB in accordance with their terms, subject,
  as to enforceability, to bankruptcy, insolvency and other laws of general
  applicability relating to or affecting creditors' rights and to general
  equity principles. SNB has full corporate power and authority to consummate
  the Bank Merger.

       (ii) Except as set forth in Section 3.1(c)(ii) of the Saratoga
  Disclosure Schedule, the execution and delivery by each of Saratoga and
  SNB, as applicable, of this Agreement and the other Transaction Agreements
  does not or will not when delivered, and the consummation of the
  transactions contemplated hereby and thereby will not, conflict with, or
  result in any violation of, or constitute a default (with or without notice
  or lapse of time, or both) under, or give rise to a right of termination,
  cancellation or acceleration of any obligation or the loss of a material
  benefit under, or the creation of a lien, pledge, security interest, charge
  or other encumbrance on any assets (any such conflict, violation, default,
  right of termination, cancellation or acceleration, loss or creation, a
  "Violation") pursuant to, (x) any provision of the articles of
  incorporation or association or by-laws or comparable organizational
  documents of Saratoga or any Subsidiary of Saratoga, or (y) subject to
  obtaining or making the consents, approvals, orders, authorizations,
  registrations, declarations and filings referred to in paragraph (iii)
  below, any loan or credit agreement, note, mortgage, indenture, lease,
  Saratoga Benefit Plan (as defined in Section 3.1(k)) or other agreement,
  obligation, instrument, permit, concession, franchise, license, judgment,
  order, decree, statute, law, ordinance, rule or regulation applicable to
  Saratoga or any Subsidiary of Saratoga or its properties or assets, which
  Violation, in the case of clause (y), individually or in the aggregate,
  would have a material adverse effect on Saratoga.

     (iii) No consent, approval, order or authorization of, or registration,
  declaration or filing with, any court, administrative agency or commission
  or other governmental authority or instrumentality, domestic or foreign (a
  "Governmental Entity"), is required by or with respect to Saratoga or any
  of its Subsidiaries in connection with the execution and delivery of this
  Agreement or the other Transaction Agreements or the consummation by
  Saratoga or SNB of the transactions contemplated hereby or thereby, which,
  if not made or obtained, would have a material adverse effect on Saratoga
  or on the ability of Saratoga or SNB to perform its respective obligations
  hereunder or thereunder on a timely basis, or on SJNB's ability to own,
  possess or exercise the rights of an owner with respect to the business and
  assets of Saratoga and its Subsidiaries, except for (A) the filing of
  applications and notices with the Board of Governors of the Federal Reserve
  System (the "Federal Reserve") under the BHC Act and approval of same, (B)
  the filing by Saratoga and SJNB with the SEC of a joint proxy statement
  (the "Proxy Statement") in definitive form relating to the meetings of the
  shareholders of Saratoga and SJNB to be held to approve and adopt this
  Agreement and the transactions contemplated hereby, (C) such applications,
  filings, authorizations, orders and approvals as may be required by the
  Office of the Comptroller of the Currency ("OCC"), and (D) the filing with
  the Secretary of State of the State of California of the Agreement of
  Merger.

   (d) Financial Statements. Saratoga has previously delivered to SJNB copies
of (a) the consolidated statements of financial condition of Saratoga and its
Subsidiaries, as of December 31, for the fiscal years 1997 and 1998, and the
related consolidated statements of income, shareholders' equity and cash flows
for the fiscal years 1996 through 1998, inclusive, as reported in Saratoga's
Annual Reports on Form 10-K for the relevant fiscal years filed with the SEC
under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), in
each case accompanied by the report of Deloitte & Touche LLP, independent
auditors with respect to Saratoga (the consolidated financial statements of
Saratoga and its Subsidiaries referred to in this sentence being hereinafter
sometimes referred to as the "Saratoga Consolidated Financial Statements").
Each of the financial statements referred to in this Section 3.1(d) (including
the related notes, where applicable) fairly present, and the financial
statements referred to in Section 5.14 hereof will fairly present (subject, in
the cases of the unaudited statements, to normal recurring and year-end audit
adjustments, none of which are expected to

                                      A-8
<PAGE>

be material in nature or amount), the results of the consolidated operations
and changes in shareholders' equity and consolidated financial condition of
Saratoga and its Subsidiaries for the respective fiscal periods or as of the
respective dates therein set forth. Each of such statements (including the
related notes, where applicable) complies, and the financial statements
referred to in Section 5.14 hereof will comply, in all material respects, with
applicable accounting requirements and with the published rules and regulations
of the SEC with respect thereto and each of such statements (including the
related notes, where applicable) has been, and the financial statements
referred to in Section 5.14 will be, prepared, in all material respects, in
accordance with United States generally accepted accounting principles ("GAAP")
consistently applied during the periods involved, except in each case as
indicated in such statements or in the notes thereto or, in the case of
unaudited statements (subject to normal recurring and year-end audit
adjustments), as permitted by Form 10-Q. The books and records of Saratoga and
its Subsidiaries have been, and are being, maintained where required in all
material respects in accordance with GAAP and any other applicable legal and
accounting requirements and, where such books and records purport to reflect
any transactions, the transactions so reflected are actual transactions.

   (e) Saratoga SEC Documents. Saratoga has made available to SJNB a true and
complete copy of each report, schedule, registration statement and definitive
proxy statement filed by Saratoga with the SEC pursuant to the Securities Act
of 1933 (the "Securities Act") or the Exchange Act (other than reports filed
pursuant to section 13(g) of the Exchange Act), since December 31, 1997 (as
such documents have since the time of their filing been amended, the "Saratoga
SEC Reports"), which are all the documents (other than preliminary material and
reports required pursuant to section 13(g) of the Exchange Act) that Saratoga
was required to file with the SEC since such date. As of their respective dates
of filing with the SEC, the Saratoga SEC Reports complied as to form in all
material respects with the requirements of the Securities Act or the Exchange
Act, as the case may be, and the rules and regulations of the SEC thereunder
applicable to such Saratoga SEC Reports, and did not contain any untrue
statement of a material fact or omit to state a material fact required to be
stated therein or necessary to make the statements therein, in light of the
circumstances under which they were made, not misleading. The financial
statements of Saratoga included in the Saratoga SEC Reports (including any
related notes and schedules thereto) complied as to form, as of their
respective dates of filing with the SEC, in all material respects with
applicable accounting requirements and with the published rules and regulations
of the SEC with respect thereto, have been prepared, in all material respects,
in accordance with GAAP applied on a consistent basis during the periods
involved (except as may be indicated in the notes thereto or, in the case of
the unaudited statements (subject to normal recurring and year-end audit
adjustments), as permitted by Form 10-Q of the SEC) and fairly present in all
material respects the consolidated financial position of Saratoga and its
consolidated Subsidiaries as at the dates thereof and the consolidated results
of operations, changes in shareholders' equity and cash flows of such companies
for the periods then ended.

   (f) Saratoga Information Supplied. None of the information supplied or to be
supplied by Saratoga for inclusion or incorporation by reference in the Proxy
Statement relating to the meeting of the shareholders of Saratoga (the
"Saratoga Shareholders' Meeting") at which the Saratoga Shareholder Approval
will be sought or for inclusion in the S-4 (as defined herein) will, at the
date of mailing to shareholders of Saratoga and at the time of the Saratoga
Shareholders' Meeting, (i) contain any untrue statement of a material fact or
omit to state any material fact required to be stated therein or necessary in
order to make the statements therein, in light of the circumstances under which
they were made, not misleading or (ii) at the time and in the light of the
circumstances under which it is made, be false or misleading with respect to
any material fact, or omit to state any material fact necessary in order to
make the statements therein not false or misleading or necessary to ycorrect
any statement in any earlier communication with respect to the solicitation of
a proxy for the Saratoga Shareholders' Meeting which has become false or
misleading.

   (g) Compliance with Applicable Laws. Saratoga and its Subsidiaries hold, and
at all relevant times have held, all permits, licenses, variances, exemptions,
orders and approvals of all Governmental Entities which are material to the
operation of the businesses of Saratoga and its Subsidiaries, taken as a whole
(the "Saratoga Permits"). Saratoga and its Subsidiaries are in compliance and
have complied with the terms of the Saratoga Permits, except where the failure
so to comply, individually or in the aggregate, would not have a material

                                      A-9
<PAGE>

adverse effect on Saratoga. The businesses of Saratoga and its Subsidiaries are
not being conducted in violation of any law, ordinance or regulation of any
Governmental Entity, except for possible violations which, individually or in
the aggregate, do not, and, insofar as reasonably can be foreseen, in the
future will not, have a material adverse effect on Saratoga. Except for routine
examinations by Federal or state Governmental Entities charged with the
supervision or regulation of banks or bank holding companies or engaged in the
insurance of bank deposits ("Bank Regulators"), no investigation by any
Governmental Entity with respect to Saratoga or any of its Subsidiaries is
pending or threatened, and no proceedings by any Bank Regulator are pending or
threatened which seek to revoke or materially limit any of the Saratoga
Permits. Saratoga and its Subsidiaries do not offer or sell insurance and/or
securities products, including but not limited to annuity products, for their
own account or the account of others.

   (h) Litigation. Except as set forth in Section 3.1(h) of the Saratoga
Disclosure Schedule, to the best knowledge of Saratoga, there is no suit,
action, proceeding, arbitration or investigation ("Litigation") pending to
which Saratoga or any Subsidiary of Saratoga is a party or by which any of such
persons or their respective assets may be bound or, to the best knowledge of
Saratoga, threatened against or affecting Saratoga or any Subsidiary of
Saratoga, or challenging the validity or propriety of the transactions
contemplated hereby which, if adversely determined, would, individually or in
the aggregate, have or reasonably be expected to have a material adverse effect
on Saratoga or on the ability of Saratoga or SNB to perform its respective
obligations under this Agreement or the Stock Option Agreement in a timely
manner, nor is there any judgment, decree, injunction, rule or order of any
Governmental Entity or arbitrator outstanding against Saratoga or any
Subsidiary of Saratoga.

   (i) Taxes. Saratoga and each of its Subsidiaries have timely filed all tax
returns required to be filed by any of them and all such tax returns were, when
filed, correct and complete in all material respects. Saratoga and each of its
Subsidiaries have timely paid (or Saratoga has paid on their behalf), or have
set up an adequate reserve for the payment of, all taxes required to be paid
(whether or not shown as due on such returns), and the most recent financial
statements that have been delivered to SJNB reflect an adequate reserve (other
than reserves for deferred taxes established to reflect differences between tax
and book basis of assets and liabilities) for all taxes accrued but not yet due
and owing, by Saratoga and its Subsidiaries accrued through the date of such
financial statements. Saratoga and its Subsidiaries file tax returns in all
jurisdictions where required to file tax returns. No material deficiencies for
any taxes have been asserted or assessed against Saratoga or any of its
Subsidiaries that are not adequately reserved for (other than reserves for
deferred taxes established to reflect differences between tax and book basis of
assets and liabilities). Except as set forth in Section 3.1(i) of the Saratoga
Disclosure Schedule: (i) there are no liens with respect to taxes upon any of
the assets or properties of Saratoga and its Subsidiaries, other than with
respect to taxes not yet due and payable, (ii) no material issue relating to
taxes of Saratoga and its Subsidiaries has been raised in writing by any taxing
authority in any audit or examination which can result in a proposed adjustment
or assessment by a governmental authority in a taxable period (or portion
thereof) ending on or before the Closing Date nor, to the best knowledge of
Saratoga, does any basis exist for the raising of any such issue, (iii)
Saratoga and its Subsidiaries have duly and timely withheld from all payments
(including employee salaries, wages and other compensation) and paid over to
the appropriate taxing authorities all amounts required to be so withheld and
paid over for all periods for which the statute of limitations has not expired
under all applicable laws and regulations, (iv) as of the Closing Date, none of
Saratoga nor any of its Subsidiaries shall be a party to, be bound by or have
any obligation under, any tax sharing agreement or similar contract or
arrangement or any agreement that obligates any of them to make any payment
computed by reference to the taxes, taxable income or taxable losses of any
other person, (v) except as set forth on Section 3.1(i) of the Saratoga
Disclosure Schedule, there is no contract or agreement, plan or arrangement by
Saratoga or any of its Subsidiaries covering any person that, individually or
collectively, could give rise to the payment of any amount that would not be
deductible by Saratoga or any of its Subsidiaries by reason of section 280G of
the Code, (vi) Saratoga and its Subsidiaries have collected all material sales
and use taxes required to be collected, and have remitted, or will remit on a
timely basis, such amounts to the appropriate governmental authorities, or have
been furnished properly completed exemption certificates and have maintained
all such records and supporting documents in all material respects in the
manner required by all applicable sales and use tax statutes and regulations
for all periods for which the statute

                                      A-10
<PAGE>

of limitations has not expired, (vii) neither Saratoga nor any of its
Subsidiaries has been a United States real property holding corporation within
the meaning of section 897(c)(2) of the Code during the applicable period
specified in section 897(c)(1)(A)(ii) of the Code, and (viii) none of Saratoga
nor any of its Subsidiaries (A) has been a member of an affiliated group (other
than the group to which they are currently members) filing a consolidated
federal income tax return or (B) has any liability for the taxes of any person
(other than the members of such current group) under Treasury Regulation
section 1.1502-6(a) (or any similar provision of state, local or foreign law),
as a transferee or successor, by contract, or otherwise. For the purpose of
this Agreement, the term "tax" (including, with correlative meaning, the terms
"taxes" and "taxable") shall include, except where the context otherwise
requires, all Federal, state, local and foreign income, profits, franchise,
gross receipts, payroll, sales, employment, use, property, withholding, excise,
occupancy, custom, duty, capital stock, ad valorem, value added, estimated,
stamp, alternative, environmental, any taxes imposed under Subchapter H of
Chapter I of Subtitle A of the Code, and other taxes, duties or assessments of
any nature whatsoever, together with all interest, penalties and additions
imposed with respect to such amounts. As used in this Agreement, the term "Tax
return" shall mean any return, declaration, report, claim for refund or
information return or statement relating to taxes, including any schedule or
attachment thereto, and including any amendment thereof. None of Saratoga nor
any of its Subsidiaries has filed a consent to the application of section
341(f) of the Code.

   (j) Certain Agreements. Section 3.1(j) of the Saratoga Disclosure Schedule
sets forth a listing of all of the following contracts and other agreements,
oral or written (which are currently in force or which may in the future be
operative in any respect) to which Saratoga or any of its Subsidiaries is a
party or by or to which Saratoga or any of its Subsidiaries or any of their
respective assets or properties are bound or subject: (i) consulting agreements
not terminable on six months or less notice involving the payment of more than
$25,000 per annum, or union, guild or collective bargaining agreements covering
any employees in the United States, (ii) agreements with any officer or other
key employee of Saratoga or any of its Subsidiaries (x) providing any term of
employment or (y) the benefits of which are contingent, or the terms of which
are materially altered, upon the occurrence of a transaction involving Saratoga
of the nature contemplated by this Agreement, (iii) any agreement or plan, any
of the benefits of which will be increased, or the vesting of the benefits of
which will be accelerated, by the occurrence of any of the transactions
contemplated by this Agreement or the value of any of the benefits of which
will be calculated on the basis of any of the transactions contemplated by this
Agreement, (iv) contracts and other agreements for the sale or lease (other
than where Saratoga or any of its Subsidiaries is a lessor) of any assets or
properties (other than in the ordinary course of business) or for the grant to
any person (other than to Saratoga or any of its Subsidiaries) of any
preferential rights to purchase any assets or properties, (v) contracts and
other agreements relating to the acquisition by Saratoga or any of its
Subsidiaries of any operating business or entity or any interest therein, (vi)
contracts or other agreements under which Saratoga or any of its Subsidiaries
agrees to indemnify any party, other than in the ordinary course of business,
consistent with past practice, or to share a tax liability of any party,
(vii) contracts and other agreements containing covenants restricting Saratoga
or any of its Subsidiaries from competing in any line of business or with any
person in any geographical area or requiring Saratoga or any of its
Subsidiaries to engage in any line of business, (viii) contracts or other
agreements (other than contracts in the ordinary course of their banking
business) relating to the borrowing of money by Saratoga or any of its
Subsidiaries, or the direct or indirect guaranty by Saratoga or any of its
Subsidiaries of any obligation for, or an agreement by Saratoga or any of its
Subsidiaries to service, the repayment of borrowed money, or any other
contingent obligations of Saratoga or any of its Subsidiaries in respect of
indebtedness of any other person, and (ix) any other material contract or other
agreement whether or not made in the ordinary course of business, including any
contract required to be filed by Saratoga pursuant to Item 601(b)(10) of
Regulation S-K of the SEC. There have been delivered or made available to SJNB
true and complete copies of all of the contracts and other agreements set forth
in Section 3.1(j) of the Saratoga Disclosure Schedule and in any other Section
of the Saratoga Disclosure Schedule. Except as set forth in Section 3.1(j) of
the Saratoga Disclosure Schedule, each such contract and other agreement is in
full force and effect and constitutes a legal, valid and binding obligation of
Saratoga or its Subsidiaries, as the case may be, and to the best knowledge of
Saratoga, each other party thereto, enforceable in accordance with its terms
subject, as to enforceability, to bankruptcy,

                                      A-11
<PAGE>

insolvency, and other laws of general applicability relating to or affecting
creditors' rights and to general equity principles. Neither Saratoga nor any
Subsidiary of Saratoga has received any notice, whether written or oral, of
termination or intention to terminate from any other party to such contract or
agreement. None of Saratoga or any of its Subsidiaries or (to the best
knowledge of Saratoga) any other party to any such contract or agreement is in
violation or breach of or default under any such contract or agreement (or with
or without notice or lapse of time or both, would be in violation or breach of
or default under any such contract or agreement), which violation, breach or
default has had or would have, individually or in the aggregate, a material
adverse effect on Saratoga.

   (k) Benefit Plans.

      (i) Section 3.1(k) of the Saratoga Disclosure Schedule contains a true
  and complete list of each "employee benefit plan" (within the meaning of
  section 3(3) of the Employee Retirement Income Security Act of 1974, as
  amended ("ERISA")), including, without limitation, multiemployer plans
  (within the meaning of ERISA section 3(37)), and all stock purchase, stock
  option, severance, employment, change-in-control, fringe benefit,
  collective bargaining, bonus, incentive, deferred compensation, employee
  stock ownership, retirement, profit sharing and all other employee benefit
  plans, agreements, programs, policies or other arrangements, whether or not
  subject to ERISA, and whether formal or informal, oral or written (all the
  foregoing being herein called "Benefit Plans"), that are sponsored or are
  being maintained or contributed to, or required to be contributed to, by
  Saratoga or any of its Subsidiaries (the "Saratoga Benefit Plans"). No
  Saratoga Benefit Plan is a multiemployer plan or is subject to a collective
  bargaining agreement.

       (ii) With respect to each Saratoga Benefit Plan, Saratoga has
  delivered to SJNB a current, accurate and complete copy (or, to the extent
  no such copy exists, an accurate description) thereof and, to the extent
  applicable, (A) any related trust agreement or other funding instrument;
  (B) the most recent determination letter; (C) any summary plan description
  and other written communications (or a description of any oral
  communications) by Saratoga or any of its Subsidiaries to any of their
  respective employees concerning the extent of the benefits provided under
  any Saratoga Benefit Plan; and (D) except as described in Section
  3.1(k)(ii) of the Saratoga Disclosure Schedule, for the two most recent
  years (I) the Form 5500 and attached schedules; (II) audited financial
  statements; and (III) actuarial valuation reports.

     (iii) Except as set forth in Section 3.1(k) of the Saratoga Disclosure
  Schedule, (A) each Saratoga Benefit Plan has been established and
  administered in accordance with its terms, and in compliance in all
  material respects with the applicable provisions of ERISA, the Code and
  other applicable laws, rules and regulations; (B) each Saratoga Benefit
  Plan which is intended to be qualified within the meaning of Code section
  401(a) is so qualified and has received a favorable determination letter as
  to its qualification and nothing has occurred, whether by action or failure
  to act, which would cause the loss of such qualification; (C) with respect
  to any Saratoga Benefit Plan, no audits, actions, suits or claims (other
  than routine claims for benefits in the ordinary course) are pending or
  threatened, and no facts or circumstances exist which could give rise to
  any such audits, actions, suits or claims; (D) neither Saratoga nor any
  other party has engaged in a prohibited transaction which could subject
  Saratoga or any of its Subsidiaries, or the Surviving Corporation, to any
  taxes, penalties or other liabilities under Code section 4975 or ERISA
  sections 409 or 502(i); (E) no event has occurred and no condition exists
  that could subject Saratoga or any of its Subsidiaries, or the Surviving
  Corporation, either directly or by reason of any such entity's affiliation
  with any member of any such entity's Controlled Group (defined as any
  organization which is a member of a controlled group of organizations
  within the meaning of Code sections 414(b), (c), (m) or (o)), to any tax,
  fine, liability or penalty imposed by ERISA, the Code or other applicable
  laws, rules and regulations; (F) all insurance and Pension Benefit Guaranty
  Corporation ("PBGC") premiums required to be paid with respect to Saratoga
  Benefit Plans through the Closing Date have been or will be paid prior
  thereto and adequate reserves will have been provided for on Saratoga's
  consolidated statement of financial condition as of the month end
  immediately prior to the Closing Date for any premiums (or portions
  thereof) attributable to service on or prior to the Closing Date; (G) all
  contributions required to be

                                      A-12
<PAGE>

  made prior to the Closing Date under the terms of each Saratoga Benefit
  Plan, the Code, ERISA or other applicable laws, rules and regulations have
  been or will be timely made and adequate reserves will have been provided
  for on Saratoga's consolidated statement of financial condition as of the
  month end immediately prior to the Closing Date for all benefits
  attributable to service on or prior to the Closing Date; (H) no Saratoga
  Benefit Plan has incurred any "accumulated funding deficiency" as such term
  is defined in ERISA section 302 and (including, but not limited to the
  voting of any securities held pursuant to an Saratoga Benefit Plan) Code
  section 412 (whether or not waived); (I) the consummation of this Agreement
  will not result in a nonexempt prohibited transaction or a breach of
  fiduciary duty under ERISA; and (J) no Saratoga Benefit Plan provides
  health coverage beyond the termination of employment except as provided
  under Code section 4980B.

       (iv) Except as set forth in Section 3.1(k)(iv) of the Saratoga
  Disclosure Schedule, with respect to each of the Saratoga Benefit Plans
  which is subject to Title IV of ERISA, as of the Closing Date, the assets
  of each such Plan shall be at least equal in value to the present value of
  the accrued benefits (vested and unvested) of the participants in such Plan
  on a termination and projected basis, based on the actuarial methods and
  assumptions indicated in the most recent actuarial valuation reports.

      (v) Except as set forth on Section 3.1(k)(v) of the Saratoga Disclosure
  Schedule, no Saratoga Benefit Plan exists which provides for an increase in
  benefits on or after the Closing Date or could result in the payment to any
  employee of Saratoga or any of its Subsidiaries of any money or other
  property or rights or accelerate or provide any other rights or benefits to
  any such employee as a result of the transactions contemplated by this
  Agreement. The aggregate amount of payments due from Saratoga under all
  such contracts and the amount due under each such contract, at the
  Effective Time, are as set forth in the schedule included in Section
  3.1(k)(v) of the Saratoga Disclosure Schedule. Except as set forth in
  Section 3.1(k)(v) of the Saratoga Disclosure Schedule, none of such
  payments will constitute an "excess parachute" payment within the meaning
  of Code section 280G.

   (l) Subsidiaries. Section 3.1(l) of the Saratoga Disclosure Schedule lists
all the Subsidiaries of Saratoga. Saratoga owns, directly or indirectly,
beneficially and of record 100% of the issued and outstanding voting securities
of each such Subsidiary. All of the shares of capital stock of each of the
Subsidiaries held by Saratoga or by another of its Subsidiaries are fully paid
and nonassessable and are owned by Saratoga or one of its Subsidiaries free and
clear of any lien, claim or other encumbrance. Neither Saratoga nor any of its
Subsidiaries owns any shares of capital stock or other equity securities of any
person (other than, in the case of Saratoga, the capital stock of its
Subsidiaries and, in the case of such Subsidiaries, shares or equity securities
acquired in satisfaction of debts previously contracted in good faith in the
ordinary course of their banking business).

   (m) Agreements with Bank or Other Regulators. Except as set forth in Section
3.1(m) of the Saratoga Disclosure Schedule, neither Saratoga nor any Subsidiary
of Saratoga is a party to any written agreement or memorandum of understanding
with, or a party to any commitment letter or similar undertaking to, or is
subject to any order or directive by, or is a recipient of any extraordinary
supervisory letter from, or has adopted any board resolutions at the request
of, any Bank Regulator which restricts materially the conduct by Saratoga or
its Subsidiaries of their businesses, or in any manner relates to their capital
adequacy, credit policies, community reinvestment, loan underwriting or
documentation or management, nor has Saratoga or any such Subsidiary been
advised by any Bank Regulator that it is contemplating issuing or requesting
(or is considering the appropriateness of issuing or requesting) any such
order, decree, agreement, memorandum of understanding, extraordinary
supervisory letter, commitment letter or similar submission, or any such board
resolutions.

   (n) Absence of Certain Changes or Events. Except as set forth in Section
3.1(n) of the Saratoga Disclosure Schedule, since December 31, 1998, (i) there
has not been any change, or any event involving a prospective change, in the
business, financial condition or results of operations or prospects of Saratoga
or any of its Subsidiaries which has had, or would be reasonably likely to
have, a material adverse effect on Saratoga, and (ii) Saratoga and each of its
Subsidiaries have conducted their respective businesses in the ordinary course

                                      A-13
<PAGE>

consistent with their past practices and neither Saratoga nor any of its
Subsidiaries has taken any action or entered into any transaction, and no event
has occurred, that would have required SJNB's consent pursuant to Section 4.1
of this Agreement if such action had been taken, transaction entered into or
event had occurred, in each case, after the date of this Agreement, nor has
Saratoga or any of its Subsidiaries entered into any agreement, plan or
arrangement to do any of the foregoing.

   (o) Undisclosed Liabilities. Except as set forth in Section 3.1(o) of the
Saratoga Disclosure Schedule, and except (i) for those liabilities or
obligations that are fully reflected or reserved against in the consolidated
statement of financial condition at December 31, 1998 of Saratoga referred to
in Section 3.1(d) or (ii) for liabilities or obligations incurred in the
ordinary course of business consistent with past practice since December 31,
1998 and which are not material to Saratoga and its Subsidiaries taken as a
whole, none of Saratoga or any of its Subsidiaries has incurred any liability
or obligation of any nature whatsoever (whether absolute, accrued or contingent
or otherwise and whether due or to become due) that, either alone or when
combined with all similar liabilities or obligations, has had, or would have, a
material adverse effect on Saratoga. No agreement pursuant to which any loans
or other assets have been or will be sold by Saratoga or any Subsidiary entitle
the buyer of such loans or other assets, unless there is material breach of a
representation or covenant by Saratoga or its Subsidiaries not relating to the
payment or other performance by an obligor of such loan or other asset of its
obligations thereunder, to cause Saratoga or its Subsidiaries to repurchase
such loan or other asset or the buyer to pursue any other form of recourse
against Saratoga or its Subsidiaries.

   (p) Governmental Reports. Saratoga and each of its Subsidiaries have timely
filed all material reports, registrations and statements, together with any
amendments required to be made with respect thereto, that they were required to
file since January 1, 1995 with any Governmental Entity and have paid all fees
and assessments due and payable in connection therewith. Except as set forth in
Section 3.1(p) of the Saratoga Disclosure Schedule and except for normal
examinations conducted by a Governmental Entity in the regular course of
business of Saratoga and its Subsidiaries, no Governmental Entity has initiated
any proceeding or, to the best knowledge of Saratoga, investigation into the
business or operations of Saratoga or any of its Subsidiaries since January 1,
1995. Except as set forth in Section 3.1(p) of the Saratoga Disclosure
Schedule, there is no material unresolved violation, criticism or exception by
any Governmental Entity with respect to any report or statement relating to any
examinations of Saratoga or any of its Subsidiaries.

   (q) Environmental Liability. (i) Except as set forth in Section 3.1(q) of
the Saratoga Disclosure Schedule, to the best knowledge of Saratoga, there are
no pending or threatened claims, actions or proceedings against Saratoga or SNB
relating to:

        (A) any asserted liability of Saratoga or any of its Affiliates or
    any current or prior owner, operator, occupier or user of any Real
    Property (as defined herein) under any Environmental Law (as defined
    herein), including without limitation, the terms and conditions of any
    permit, license, authority, settlement or other obligation arising
    under any Environmental Law;

        (B) any handling, storage, use or disposal of Hazardous Substances
    (as defined herein) on, under or within any Real Property or any
    transportation or removal of Hazardous Substances to or from any Real
    Property;

        (C) any actual or threatened discharge, release or emission of
    Hazardous Substances from, on, under or within any Real Property into
    the air, water, surface water, groundwater, land surface or subsurface
    strata; or

        (D) any actual or asserted claims for personal injuries, illness or
    damage to real or personal property related to or arising out of
    exposure to Hazardous Substances discharged, released or emitted from,
    on, under, within or into, or transported from or to, any Real
    Property.

     (ii) Except as set forth in Section 3.1(q) of the Saratoga Disclosure
  Schedule, to the best knowledge of Saratoga, no Hazardous Substances are
  present on, under or within any Real Property (except those Hazardous
  Substances used in the normal course of operating or maintaining the
  business of Saratoga or

                                      A-14
<PAGE>

  any Subsidiary of Saratoga) and, except as set forth in Section 3.1(q) of
  the Saratoga Disclosure Schedule, the presence of these Hazardous
  Substances does not violate any Environmental Law. Except as set forth in
  Section 3.1(q) of the Saratoga Disclosure Schedule, to the best knowledge
  of Saratoga, there are no storage tanks underground or otherwise present on
  any Real Property and all such tanks set forth in Section 3.1(q) of the
  Saratoga Disclosure Schedule comply in all material respects with
  applicable law, all permits in respect thereof are in full force and effect
  and there have been no releases or discharges of Hazardous Substances from
  such tanks to the environment.

     (iii) To the best knowledge of Saratoga, except as set forth in Section
  3.1(q) of the Saratoga Disclosure Schedule, no Hazardous Substances have
  been, or have been threatened to be, discharged, released or emitted in a
  Reportable Quantity (as defined herein) into the air, water, surface water,
  groundwater, land surface or subsurface strata or transported to or from
  the Real Property except in accordance with Environmental Laws (in
  particular, but without limitation, in accordance with any permits issued
  pursuant thereto). To the best knowledge of Saratoga, all notifications,
  remediation, removal or other response actions of any kind whatsoever, in
  respect of such discharges, releases and emissions which are required by
  Environmental Laws, and by applicable agreements with third parties, have
  been made within the time limits prescribed by such Environmental Laws and
  such third party agreements. Copies of all such notifications or documents
  relating to any remediation, removal or response action have previously
  been provided to SJNB.

     (iv) To the best knowledge of Saratoga, except as set forth in Section
  3.1(q) of the Saratoga Disclosure Schedule, Saratoga and its Affiliates are
  in compliance, in all material respects, with all Environmental Laws
  related to the ownership, operation, use and occupation of the Real
  Property.

     (v) To the best knowledge of Saratoga, except as set forth in Section
  3.1(q) of the Saratoga Disclosure Schedule, no part of any Real Property is
  listed on CERCLIS or the National Priorities List created pursuant to the
  Comprehensive Environmental Response Compensation and Liability Act of
  1980, as amended, as a site containing Hazardous Substances.

     (vi) Saratoga has provided SJNB with copies of all material notices
  posted by it under any Environmental Law with respect to the Real Property
  at which the business of Saratoga or its Subsidiaries is conducted,
  including without limitation, notices required under California Health &
  Safety Code section 25359.7.

     (vii) All properties held by Saratoga or its Subsidiaries under leases
  are held by them under valid, binding and enforceable leases, with such
  exceptions as are not material and do not interfere with the conduct of the
  business of Saratoga, and Saratoga enjoys quiet and peaceful possession of
  such leased property. Saratoga and its Subsidiaries are not in default in
  any material respect under any material lease, agreement or obligation
  regarding their properties to which they are a party or by which they are
  bound.

     (viii) Except as set forth in Section 3.1(q) of the Saratoga Disclosure
  Schedule, all of Saratoga's and its Subsidiaries' rights and obligations
  under the leases referred to in Section 3.1(q)(vii) above do not require
  the consent of any other party to the transactions contemplated by this
  Agreement.

     (ix) For purposes of this Section 3.1(q) and Section 3.2(q) only, the
  following terms shall have the indicated meaning:

       "Business" means the business conducted at any Real Property (as
    defined below).

       "Environmental Law" means any and all applicable federal, state and
    local laws (whether under common law, statute, rule, regulation or
    otherwise), requirements under permits issued with respect thereto, and
    other orders, decrees, judgments, directives or other requirements of
    any governmental authority relating to the environment, or to any
    Hazardous Substances.

       "Hazardous Substances" means any chemical, compound, material,
    mixture, living organism or substance that is now defined or listed in,
    or otherwise classified or regulated in any way pursuant to,

                                      A-15
<PAGE>

    any Environmental Laws as a "hazardous waste," "hazardous substance,"
    "hazardous material," "extremely hazardous waste," "infectious waste,"
    "toxic substance," or "toxic pollutants," such materials, including
    without limitation, oil, waste oil, petroleum, waste petroleum,
    polychlorinated biphenyls ("PCBs"), asbestos, radon, natural gas,
    natural gas liquids, liquefied natural gas, or synthetic gas usable for
    fuel (or mixtures of natural gas and such synthetic gas).

       "Real Property" means all interests in real property of Saratoga or
    its Subsidiaries (with respect to Section 3.1) or SJNB or its
    Subsidiaries (with respect to Section 3.2), including without
    limitation, interests in fee, leasehold, interest as mortgagee or
    secured party, or option or contract to purchase or acquire.

       "Reportable Quantity" means the quantity set forth in 40 C.F.R. Part
    302 as it is in effect on the effective date of this Agreement for the
    particular Hazardous Substances set forth therein. With respect to
    Hazardous Substances not listed in that part, if any, "reportable
    quantity" means that quantity which, if released, would be required to
    be reported to a Governmental Entity pursuant to applicable
    Environmental Law. "Reportable Quantity" shall be determined based on a
    single release or series of related releases or threatened releases.

   (r) Properties. Except as set forth in Section 3.1(r) of the Saratoga
Disclosure Schedule, Saratoga or its Subsidiaries (i) has good and marketable
title to all Real Property owned in fee, and good title to all other properties
and assets reflected in the Saratoga Consolidated Financial Statements as being
owned by Saratoga or its Subsidiaries or acquired after the date thereof which
are material to the business of Saratoga on a consolidated basis (except
properties sold or otherwise disposed of since the date thereof in the ordinary
course of business), free and clear of all claims, liens, charges, security
interests or encumbrances of any nature whatsoever except (A) statutory liens
securing payments not yet delinquent, (B) liens on assets of SNB securing
deposits incurred in the ordinary course of its banking business and (C) such
imperfections or irregularities of title, claims, liens, charges, security
interests or encumbrances as do not materially affect the use of the properties
or assets subject thereto or affected thereby or otherwise materially impair
business operations at such properties and (ii) is the lessee of all leasehold
estates reflected in the Saratoga Consolidated Financial Statements or acquired
after the date thereof which are material to its business on a consolidated
basis (except for leases that have expired by their terms since the date
thereof) and is in possession of the properties purported to be leased
thereunder, and each such lease is valid without material default thereunder by
the lessee or, to the best knowledge of Saratoga, the lessor. Except as set
forth in Section 3.1(r) of the Saratoga Disclosure Schedule, all real
properties owned by Saratoga or its Subsidiaries are owned in accordance in all
material respects with all requirements of applicable rules, regulations and
policies of the Bank Regulators.

   (s) Transactions with Affiliates. Except as set forth in Section 3.1(s) of
the Saratoga Disclosure Schedule and except for those arrangements, contracts,
agreements or transactions which were entered into in the ordinary course of
business, since December 31, 1998, neither Saratoga nor SNB has extended
credit, committed to extend credit or transferred any asset to or assumed or
guaranteed any liability of or entered into any other transactions with the
employees or directors of Saratoga or SNB, or any spouse or child of any of
them, or to any of their "affiliates" or "associates" as such terms are defined
in Rule 405 under the Securities Act. Any such transactions, including those in
the ordinary course of business, have been on terms no less favorable than
those which would prevail in an arm's-length transaction with an independent
third party.

   (t) Brokers or Finders. No agent, broker, investment banker, financial
advisor or other firm or person is or will be entitled to any broker's or
finder's fee or any other similar commission or fee in connection with any of
the transactions contemplated by this Agreement, except for First Security Van
Kasper whose fees and expenses will be paid by Saratoga in accordance with
Saratoga's agreement with such firm (a copy of which agreement has been
delivered to SJNB prior to the date of this Agreement).

   (u) Intellectual Property. Except as set forth in Section 3.1(u) of the
Saratoga Disclosure Schedule, Saratoga and its Subsidiaries own or have a valid
license to use all trademarks, service marks and trade names (including any
registrations or applications for registration of any of the foregoing)
(collectively, the "Saratoga

                                      A-16
<PAGE>

Intellectual Property") necessary to carry on their business substantially as
currently conducted, except for such Saratoga Intellectual Property the failure
of which to own or validly license, individually or in the aggregate, would not
reasonably be expected to have a material adverse effect on Saratoga. Neither
Saratoga nor any such Subsidiary has received any notice of infringement of or
conflict with, and, to the best knowledge of Saratoga, there are no
infringements of or conflicts with, the rights of others with respect to the
use of any Saratoga Intellectual Property that, individually or in the
aggregate, in either such case, would reasonably be expected to have a material
adverse effect on Saratoga.

   (v) Pooling of Interests. Except as set forth in Section 3.1(v) of the
Saratoga Disclosure Schedule, as of the date of this Agreement, Saratoga has no
reason (in respect to matters pertaining to Saratoga existing as of the date
hereof or expected to exist as of the Closing Date) to believe that Saratoga
will not qualify for pooling of interests treatment for accounting purposes
under GAAP as presently in effect.

   (w) Opinion of Financial Advisor. Saratoga has received the written opinion
of First Security Van Kasper dated the date hereof, to the effect that, as of
such date, subject to the limitations and conditions contained therein, the
consideration to be received by the holders of Saratoga Common Stock pursuant
to the Merger is fair to such holders from a financial point of view.

   (x) Community Reinvestment Act Compliance. SNB is in substantial compliance
with the applicable provisions of the Community Reinvestment Act of 1977 and
the regulations promulgated thereunder (collectively, the "CRA") and has
received a CRA rating of "satisfactory" from the OCC in its most recent
examination, and neither Saratoga nor SNB has any knowledge of the existence of
any fact or circumstance or set of facts or circumstances which could be
reasonably expected to result in SNB failing to be in substantial compliance
with such provisions or having its current rating lowered.

   (y) Year 2000 Readiness. Saratoga and its Subsidiaries have a plan and
organization in place to minimize any material adverse effect caused by the
failure of any system, equipment or product which is material to their
respective operations or financial condition to be Year 2000 Ready (as defined
below). Such plan addresses, at a minimum, the issues set forth in the
statements of the Federal Financial Institutions Examination Council ("FFIEC"),
dated May 5, 1997, entitled "Year 2000 Project Management Awareness," and
December 1997, entitled "Safety and Soundness Guidelines Concerning the Year
2000 Business Risk," as well as any other statements of the FFIEC related to
the Year 2000, as such issues might affect Saratoga and its Subsidiaries.
Saratoga has provided to SJNB a complete and accurate copy of the plan, which
includes Saratoga's Year 2000 organization and an estimate of anticipated
associated costs. Saratoga is using its best efforts to implement such plan,
which includes seeking assurances from its vendors and suppliers that such
vendors' and suppliers' products and services which are material to its
operations are Year 2000 Ready, replacing any material products and services
supplied by such vendors or suppliers which are not Year 2000 Ready with new
products and services which are Year 2000 Ready, and/or working with such
vendors and suppliers to achieve Year 2000 Readiness with respect to such
material products and services. Such plan shall also establish procedures to
evaluate, manage and mitigate Year 2000-related risks to Saratoga posed by
material customers of Saratoga or any of its Subsidiaries who may not
themselves be Year 2000 Ready. Neither Saratoga nor its Subsidiaries have
received, or expect to receive, a "Year 2000 Deficiency Notification Letter"
(as such term is employed in the Federal Reserve's Supervision and Regulation
Letter No. SR 98-3 (SUP), dated March 4, 1998). As used herein, the term "Year
2000 Ready" shall mean that the functionality and the performance of any system
or piece of equipment will not be materially adversely affected as a result of
the date change for any date on or after January 1, 2000, including leap year
calculations, and that, to the extent applicable to normal operating
specifications, the system or equipment will in all material respects
accurately accept, store, retrieve, calculate, compare and otherwise process
dates of January 1, 2000 and later.

   (z) Insurance. Saratoga has previously delivered to SJNB a list identifying
all insurance policies maintained on behalf of Saratoga and its Subsidiaries
(other than mortgage, title and other similar policies for the benefit of
Saratoga or its Subsidiaries as mortgagees under residential mortgage loans).
All of the material insurance policies and bonds maintained by or for the
benefit of Saratoga and its Subsidiaries are in full force

                                      A-17
<PAGE>

and effect, to the best knowledge of Saratoga, Saratoga and its Subsidiaries
are not in default thereunder, and all material claims thereunder have been
filed in due and timely fashion, and neither Saratoga nor any of its
Subsidiaries has received notice that any of such material claims have been or
will be denied. The insurance policies and bonds maintained by Saratoga and its
Subsidiaries are written by reputable insurers and are in such amounts, cover
such risks and have such other terms as is customary for banks and bank holding
companies comparable in size and operations to Saratoga and its Subsidiaries.
Since December 31, 1998, there has not been any damage to, destruction of, or
loss of any assets of Saratoga and its Subsidiaries (whether or not covered by
insurance) that could have a material adverse effect on Saratoga. Neither
Saratoga nor any of its Subsidiaries has received any notice of a premium
increase or cancellation with respect to any of its insurance policies or
bonds, and within the last three years, neither Saratoga nor any of its
Subsidiaries has been refused any insurance coverage sought or applied for, and
Saratoga has no reason to believe that existing insurance coverage cannot be
renewed as and when the same shall expire, upon terms and conditions as
favorable as those presently in effect, other than possible increases in
premiums or unavailability in coverage that have not resulted from an
extraordinary loss experience of Saratoga or any Saratoga Subsidiary.

   (aa) Loans and Other Assets.

     (i) Saratoga has disclosed to SJNB prior to the date hereof the amounts
  of all loans, leases, other extensions of credit, commitments or other
  interest-bearing assets presently owned by Saratoga or any of its
  Subsidiaries that have been classified by any Bank Regulator, Saratoga's
  independent auditors, or the management of Saratoga or any Subsidiary of
  Saratoga as "Other Loans Especially Mentioned," "Substandard," "Doubtful,"
  or "Loss", or classified using categories with similar import, and will
  have disclosed promptly to SJNB prior to the Closing Date all such items
  which will be so classified hereafter and prior to the Closing Date. All
  such assets or portions thereof classified "Loss", or which are
  subsequently so classified, have been (or will be) charged off on a timely
  basis in full, collected or otherwise placed in a bankable condition.
  Saratoga regularly reviews and appropriately classifies its and its
  Subsidiaries' loans and other assets in accordance in all material respects
  with all applicable legal and regulatory requirements and GAAP. Saratoga
  has disclosed to SJNB the amounts and identities of all other real estate
  owned ("OREO") that has been classified as such as of the date hereof by
  Saratoga's independent auditors, management of Saratoga or any Bank
  Regulator and will have promptly disclosed to SJNB prior to the Closing
  Date all such assets which will be so classified hereafter and prior to the
  Closing Date. As of the date hereof and the Closing Date, the recorded
  values of all OREO on the books of Saratoga and its Subsidiaries accurately
  reflect and will reflect the net realizable values of each OREO parcel
  thereof in compliance with GAAP. Saratoga and its Subsidiaries have
  recorded on a timely basis all expenses associated with or incidental to
  its OREO, including but not limited to taxes, maintenance and repairs as
  required by GAAP.

     (ii) All loans, leases, other extensions of credit, commitments or other
  interest-bearing assets and investments of Saratoga and its Subsidiaries
  are legal, valid and binding obligations enforceable in accordance with
  their respective terms and are not subject to any setoffs, counterclaims or
  disputes known to Saratoga (subject to applicable bankruptcy, insolvency
  and similar laws affecting creditors' rights generally and subject, as to
  enforceability, to equitable principles of general applicability), except
  as previously disclosed to SJNB in Section 3.1(aa)(ii) of the Saratoga
  Disclosure Schedule or reserved for in the consolidated statement of
  financial condition of Saratoga as of December 31, 1998 referred to in
  Section 3.1(d) in accordance with GAAP, and were duly authorized under and
  made in compliance with applicable federal and state laws and regulations.
  Saratoga and its Subsidiaries do not have any extensions or letters of
  credit, investments, guarantees, indemnification agreements or commitments
  for the same (including without limitation commitments to issue letters of
  credit, to create acceptances, or to repurchase securities, federal funds
  or other assets) other than those documented on the books and records of
  Saratoga and its Subsidiaries.

   (ab) Restrictions on Investments. Except for pledges to secure public and
trust deposits and repurchase agreements in the ordinary course of business and
except as described in Section 3.1(ab) of the Saratoga Disclosure Schedule,
none of the investments reflected in the consolidated statement of financial
condition of

                                      A-18
<PAGE>

Saratoga as of December 31, 1998 referred to in Section 3.1(d), and none of
the investments made by Saratoga and its Subsidiaries since December 31, 1998,
is subject to any restriction, whether contractual or statutory, which
materially impairs the ability of Saratoga or its Subsidiaries freely to
dispose of such investment at any time.

   (ac) No Brokered Deposits. Except as described in Section 3.1(ac) of the
Saratoga Disclosure Schedule, as of the date hereof, neither Saratoga nor any
of its Subsidiaries now has any "brokered deposits" as such deposits are
defined by applicable regulations of the OCC as of the date hereof.

   (ad) Derivatives Contracts; Structured Notes; Etc. Except as set forth in
Section 3.1(ad) of the Saratoga Disclosure Schedule, neither Saratoga nor any
Subsidiary is a party to or has agreed to enter into an exchange traded or
over-the-counter equity, interest rate, foreign exchange or other swap,
forward, future, option, cap, floor or collar or any other contract that is
not included on the balance sheet and is a derivatives contract (including
various combinations thereof) (each, a "Derivatives Contract") or owns
securities that (1) are referred to generically as "structured notes," "high
risk mortgage derivatives," "capped floating rate notes" or "capped floating
rate mortgage derivatives" or (2) are likely to have changes in value as a
result of interest or exchange rate changes that significantly exceed normal
changes in value attributable to interest or exchange rate changes, except for
those Derivatives Contracts and other instruments legally purchased or entered
into in the ordinary course of their banking business, consistent with safe
and sound banking practices and regulatory guidance, and with counterparties
reasonably believed by Saratoga to be financially responsible. All of such
Derivatives Contracts or other instruments are legal, valid and binding
obligations of Saratoga or one of its Subsidiaries and, to the best knowledge
of Saratoga, each of the other counterparties thereto, enforceable in
accordance with their terms (except as enforcement may be limited by general
principles of equity whether applied in a court of law or a court of equity
and by bankruptcy, insolvency and similar laws affecting creditors' rights and
remedies generally), and are in full force and effect. Saratoga and each of
its Subsidiaries and, to the best knowledge of Saratoga, each of the other
counterparties thereto, have duly performed in all material respects all of
their material obligations thereunder to the extent that such obligations to
perform have accrued; and there are no breaches, violations or defaults or
allegations or assertions of such by any party thereunder which would have or
would reasonably be expected to have a material adverse effect on Saratoga.

   (ae) Labor Matters. Neither Saratoga nor any of its Subsidiaries is a party
to, or is bound by, any collective bargaining agreement, contract or other
agreement or understanding with a labor union or labor organization, nor is it
or any of its Subsidiaries the subject of a proceeding asserting that it or
any such Subsidiary has committed an unfair labor practice (within the meaning
of the National Labor Relations Act) or seeking to compel it or such
Subsidiary to bargain with any labor organization as to wages and conditions
of employment, nor is there any strike or other labor dispute involving it or
any of its Subsidiaries pending or, to the best of its knowledge, threatened,
nor is it aware of any activity involving it or any of its Subsidiaries'
employees seeking to certify a collective bargaining unit or engaging in any
other organization activity.

   3.2 Representations and Warranties of SJNB. SJNB represents and warrants to
Saratoga as follows:

   (a) Organization, Standing and Power. SJNB is a bank holding company
registered under the BHC Act. The deposit accounts of SJNB's bank Subsidiaries
are insured by the BIF of the FDIC to the fullest extent permitted by law, and
all premiums and assessments required in connection therewith have been paid
when due. SJNB and each of its Subsidiaries is a bank or corporation duly
organized, validly existing and in good standing under the laws of its
jurisdiction of incorporation or organization, has all requisite power and
authority to own, lease and operate its properties and to carry on its
business as now being conducted and is duly qualified and in good standing to
do business in each jurisdiction in which the nature of its business or the
ownership or leasing of its properties makes such qualification necessary,
other than in such jurisdictions where the failure so to qualify would not,
either individually or in the aggregate, have a material adverse effect on
SJNB. The Articles of Incorporation or Association and By-laws of each of
SJNB, and each Subsidiary of SJNB, copies of which were previously made
available to Saratoga, are true, complete and correct. The minute books of
SJNB and its Subsidiaries which have been made available to Saratoga contain a
complete (except for

                                     A-19
<PAGE>

certain portions thereof relating to the Merger and the transactions
contemplated hereby) and accurate record of all meetings of the respective
Boards of Directors (and committees thereof) and shareholders.

   (b) Capital Structure; Ownership of SJNB Common Stock.

      (i) The authorized capital stock of SJNB consists of 20,000,000 shares
  of SJNB Common Stock and 5,000,000 shares of preferred stock, no par value
  (the "SJNB Preferred Stock"), of which (A) as of August 25, 1999, 2,350,118
  shares of SJNB Common Stock were outstanding (none having been issued
  thereafter except from the exercise of SJNB Options) and (B) as of the date
  hereof, no shares of SJNB Preferred Stock are outstanding. All outstanding
  shares of SJNB Common Stock have been duly authorized and validly issued
  and are fully paid and non-assessable and not subject to preemptive rights.
  At the Effective Time, the SJNB Common Stock to be issued hereunder will
  be, when issued in accordance with the terms hereof, duly authorized,
  validly issued, fully paid and non-assessable and not subject to preemptive
  rights.

       (ii) Except for this Agreement and except as set forth in Section
  3.2(b)(ii) of the disclosure schedule of SJNB delivered to Saratoga on the
  date hereof (the "SJNB Disclosure Schedule"), (A) there are no options,
  warrants, calls, rights, commitments or agreements of any character to
  which SJNB or any of its Subsidiaries or Affiliates is a party or by which
  any of the foregoing are bound obligating SJNB or any of its Subsidiaries
  or Affiliates to issue, deliver or sell, or cause to be issued, delivered
  or sold, additional shares of capital stock of SJNB or any of its
  Subsidiaries or obligating SJNB or any of its Subsidiaries or Affiliates to
  grant, extend or enter into any such option, warrant, call, right,
  commitment or agreement, (B) there are no outstanding contractual
  obligations of SJNB or any of its Subsidiaries or Affiliates to repurchase,
  redeem or otherwise acquire any shares of capital stock of SJNB or any of
  its Subsidiaries and (C) there are no outstanding securities of any kind
  convertible into or exchangeable for the capital stock of SJNB or any of
  its Subsidiaries (or any interest therein). Except as set forth in Section
  3.2(b)(ii) of the SJNB Disclosure Schedule, there is no agreement of any
  kind to which SJNB is a party and, to the knowledge of SJNB (without
  inquiry), no other agreement of any kind, in each case that gives any
  person any right to participate in the equity, value or income of, or to
  vote (x) in the election of directors or officers of, or (y) otherwise with
  respect to the affairs of, SJNB or any of its Subsidiaries.

     (iii) Neither SJNB nor any of its Subsidiaries or, to the best knowledge
  of SJNB, its Affiliates, beneficially owns, directly or indirectly, any
  shares of capital stock of SJNB, securities of SJNB convertible into, or
  exchangeable for, such shares, or options, warrants or other rights to
  acquire such shares (regardless of whether such securities, options,
  warrants or other rights are then exercisable or convertible), nor is SJNB
  or any of such Subsidiaries or Affiliates a party to any agreement,
  arrangement or understanding for the purpose of acquiring, holding, voting
  or disposing of shares of capital stock of SJNB or any such other
  securities, options, warrants or other rights.

       (iv) No shares of SJNB Common Stock held directly or indirectly by
  SJNB are Trust Account Shares or DPC Shares.

   (c) Authority; No Violation.

      (i) SJNB has all requisite corporate power and authority to enter into
  this Agreement and the other Transaction Agreements and to consummate the
  transactions contemplated hereby and thereby. The execution and delivery of
  this Agreement and the other Transaction Agreements and the consummation of
  the transactions contemplated hereby and thereby have been duly authorized
  by all necessary corporate action on the part of SJNB, other than the
  approval of this Agreement and the Agreement of Merger by the holders of a
  majority of the outstanding shares of SJNB Common Stock (the "SJNB
  Shareholder Approval"). The SJNB Shareholder Approval is the only vote of
  any class or series of SJNB capital stock necessary to approve this
  Agreement and the other Transaction Agreements and the consummation of the
  transactions contemplated hereby and thereby. This Agreement and the other
  Transaction Agreements have been duly executed and delivered by SJNB and
  (assuming due authorization, execution and delivery by Saratoga and SNB)
  constitute the valid and binding obligation of SJNB enforceable against
  SJNB in

                                      A-20
<PAGE>

  accordance with their terms, subject, as to enforceability, to bankruptcy,
  insolvency and other laws of general applicability relating to or affecting
  creditors' rights and to general equity principles. San Jose National Bank
  has full corporate power and authority to consummate the Bank Merger.

       (ii) Except as set forth in Section 3.2(c)(ii) of the SJNB Disclosure
  Schedule, the execution and delivery by SJNB of this Agreement and the
  other Transaction Agreements does not or will not when delivered, and the
  consummation of the transactions contemplated hereby and thereby will not,
  result in any Violation pursuant to, (x) any provision of the articles of
  incorporation or association or by-laws or comparable organizational
  documents of SJNB or any Subsidiary of SJNB, or (y) subject to obtaining or
  making the consents, approvals, orders, authorizations, registrations,
  declarations and filings referred to in paragraph (iii) below, any loan or
  credit agreement, note, mortgage, indenture, lease, SJNB Benefit Plan (as
  defined in Section 3.2(k)) or other agreement, obligation, instrument,
  permit, concession, franchise, license, judgment, order, decree, statute,
  law, ordinance, rule or regulation applicable to SJNB or any Subsidiary of
  SJNB or its properties or assets, which Violation, in the case of clause
  (y), individually or in the aggregate, would have a material adverse effect
  on SJNB.

     (iii) No consent, approval, order or authorization of, or registration,
  declaration or filing with, any Governmental Entity is required by or with
  respect to SJNB or any of its Subsidiaries in connection with the execution
  and delivery of this Agreement or the other Transaction Agreements or the
  consummation by SJNB of the transactions contemplated hereby or thereby,
  which, if not made or obtained, would have a material adverse effect on
  SJNB or on the ability of SJNB to perform its obligations hereunder or
  thereunder on a timely basis, or on SJNB's ability to own, possess or
  exercise the rights of an owner with respect to the business and assets of
  Saratoga and its Subsidiaries, except for (A) the filing of applications
  and notices with the Federal Reserve under the BHC Act and approval of
  same, (B) the filing by Saratoga and SJNB with the SEC of the Proxy
  Statement in definitive form relating to the meetings of the shareholders
  of Saratoga and SJNB to be held to approve and adopt this Agreement and the
  transactions contemplated hereby, (C) the filing by SJNB with the SEC of a
  registration statement on Form S-4 (the "S-4") with respect to the SJNB
  Common Stock issuable pursuant hereto, (D) approval for listing upon
  official notice of issuance on the NASDAQ National Market of the SJNB
  Common Stock issuable pursuant hereto, (E) compliance with applicable state
  blue sky laws, and (F) the filing with the Secretary of State of the State
  of California of the Agreement of Merger.

   (d) Financial Statements. SJNB has previously delivered to Saratoga copies
of (a) the consolidated statements of financial condition of SJNB and its
Subsidiaries, as of December 31, for the fiscal years 1997 and 1998, and the
related consolidated statements of income, shareholders' equity and cash flows
for the fiscal years 1996 through 1998, inclusive, as reported in SJNB's Annual
Reports on Form 10-K for the relevant fiscal years filed with the SEC under the
Exchange Act, in each case accompanied by the report of KPMG LLP, independent
auditors with respect to SJNB (the consolidated financial statements of SJNB
and its Subsidiaries referred to in this sentence being hereinafter sometimes
referred to as the "SJNB Consolidated Financial Statements"). Each of the
financial statements referred to in this Section 3.2(d) (including the related
notes, where applicable) fairly present, and the consolidated financial
statements referred to in Section 5.14 hereof will fairly present (subject in
the cases of the unaudited statements, to normal recurring and year-end audit
adjustments, none of which are expected to be material in nature or amount),
the results of the consolidated operations and changes in shareholders' equity
and consolidated financial condition of SJNB and its Subsidiaries for the
respective fiscal periods or as of the respective dates therein set forth. Each
of such statements (including the related notes, where applicable) complies,
and the financial statements referred to in Section 5.14 hereof will comply, in
all material respects, with applicable accounting requirements and with the
published rules and regulations of the SEC with respect thereto and each of
such statements (including the related notes, where applicable) has been, and
the financial statements referred to in Section 5.14 will be, prepared, in all
material respects, in accordance with GAAP consistently applied during the
periods involved, except in each case as indicated in such statements or in the
notes thereto or, in the case of the unaudited statements (subject to normal
recurring and year-end audit adjustments), as permitted by Form 10-Q. The books
and records of SJNB and its Subsidiaries have been, and are being, maintained
where required in all material

                                      A-21
<PAGE>

respects in accordance with GAAP and any other applicable legal and accounting
requirements and, where such books and records purport to reflect any
transactions, the transactions so reflected are actual transactions.

   (e) SJNB SEC Documents. SJNB has made available to Saratoga a true and
complete copy of each report, schedule, registration statement and definitive
proxy statement filed by SJNB with the SEC pursuant to the Securities Act or
the Exchange Act (other than reports filed pursuant to section 13(g) of the
Exchange Act), since December 31, 1997 (as such documents have since the time
of their filing been amended, the "SJNB SEC Reports"), which are all the
documents (other than preliminary material and reports required pursuant to
section 13(g) of the Exchange Act) that SJNB was required to file with the SEC
since such date. As of their respective dates of filing with the SEC, the SJNB
SEC Reports complied as to form in all material respects with the requirements
of the Securities Act or the Exchange Act, as the case may be, and the rules
and regulations of the SEC thereunder applicable to such SJNB SEC Reports, and
did not contain any untrue statement of a material fact or omit to state a
material fact required to be stated therein or necessary to make the statements
therein, in light of the circumstances under which they were made, not
misleading. The financial statements of SJNB included in the SJNB SEC Reports
(including any related notes and schedules thereto) complied as to form, as of
their respective dates of filing with the SEC, in all material respects with
applicable accounting requirements and with the published rules and regulations
of the SEC with respect thereto, have been prepared, in all material respects,
in accordance with GAAP applied on a consistent basis during the periods
involved (except as may be indicated in the notes thereto or, in the case of
the unaudited statements (subject to normal recurring and year-end audit
adjustments), as permitted by Form 10-Q of the SEC) and fairly present in all
material respects the consolidated financial position of SJNB and its
consolidated Subsidiaries as at the dates thereof and the consolidated results
of operations, changes in shareholders' equity and cash flows of such companies
for the periods then ended.

   (f) SJNB Information Supplied. None of the information supplied or to be
supplied by SJNB for inclusion or incorporation by reference in the Proxy
Statement relating to the meeting of shareholders of SJNB (the "SJNB
Shareholders' Meeting") at which the SJNB Shareholder Approval will be sought
or for inclusion in the S-4 will, at the date of mailing to shareholders of
SJNB and at the time of the SJNB Shareholders' Meeting, (i) contain any untrue
statement of a material fact or omit to state any material fact required to be
stated therein or necessary in order to make the statements therein, in light
of the circumstances under which they were made, not misleading or (ii) at the
time and in the light of the circumstances under which it is made, be false or
misleading with respect to any material fact, or omit to state any material
fact necessary in order to make the statements therein not false or misleading
or necessary to correct any statement in any earlier communication with respect
to the solicitation of a proxy for the SJNB Shareholders' Meeting which has
become false or misleading.

   (g) Compliance with Applicable Laws. SJNB and its Subsidiaries hold, and at
all relevant times have held, all permits, licenses, variances, exemptions,
orders and approvals of all Governmental Entities which are material to the
operation of the businesses of SJNB and its Subsidiaries, taken as a whole (the
"SJNB Permits"). SJNB and its Subsidiaries are in compliance and have complied
with the terms of the SJNB Permits, except where the failure so to comply,
individually or in the aggregate, would not have a material adverse effect on
SJNB. The businesses of SJNB and its Subsidiaries are not being conducted in
violation of any law, ordinance or regulation of any Governmental Entity,
except for possible violations which, individually or in the aggregate, do not,
and, insofar as reasonably can be foreseen, in the future will not, have a
material adverse effect on SJNB. Except for routine examinations by Bank
Regulators, no investigation by any Governmental Entity with respect to SJNB or
any of its Subsidiaries is pending or threatened, and no proceedings by any
Bank Regulator are pending or threatened which seek to revoke or materially
limit any of the SJNB Permits. SJNB and its Subsidiaries do not offer or sell
insurance and/or securities products, including but not limited to annuity
products, for their own account or the account of others.

   (h) Litigation. Except as set forth in Section 3.2(h) of the SJNB Disclosure
Schedule, to the best knowledge of SJNB, there is no Litigation pending to
which SJNB or any Subsidiary of SJNB is a party or by

                                      A-22
<PAGE>

which any of such persons or their respective assets may be bound or, to the
best knowledge of SJNB, threatened against or affecting SJNB or any Subsidiary
of SJNB, or challenging the validity or propriety of the transactions
contemplated hereby which, if adversely determined, would, individually or in
the aggregate, have or reasonably be expected to have a material adverse effect
on SJNB or on the ability of SJNB to perform its obligations under this
Agreement in a timely manner, nor is there any judgment, decree, injunction,
rule or order of any Governmental Entity or arbitrator outstanding against SJNB
or any Subsidiary of SJNB.

   (i) Taxes. SJNB and each of its Subsidiaries have timely filed all tax
returns required to be filed by any of them and all such tax returns were, when
filed, correct and complete in all material respects. SJNB and each of its
Subsidiaries have timely paid (or SJNB has paid on their behalf), or have set
up an adequate reserve for the payment of, all taxes required to be paid
(whether or not shown as due on such returns), and the most recent financial
statements that have been delivered to Saratoga reflect an adequate reserve
(other than reserves for deferred taxes established to reflect differences
between tax and book basis of assets and liabilities) for all taxes accrued but
not yet due and owing, by SJNB and its Subsidiaries accrued through the date of
such financial statements. SJNB and its Subsidiaries file tax returns in all
jurisdictions where required to file tax returns. No material deficiencies for
any taxes have been asserted or assessed against SJNB or any of its
Subsidiaries that are not adequately reserved for (other than reserves for
deferred taxes established to reflect differences between tax and book basis of
assets and liabilities). Except as set forth in Section 3.2(i) of the SJNB
Disclosure Schedule: (i) there are no liens with respect to taxes upon any of
the assets or properties of SJNB and its Subsidiaries, other than with respect
to taxes not yet due and payable, (ii) no material issue relating to taxes of
SJNB and its Subsidiaries has been raised in writing by any taxing authority in
any audit or examination which can result in a proposed adjustment or
assessment by a governmental authority in a taxable period (or portion thereof)
ending on or before the Closing Date nor, to the best knowledge of SJNB, does
any basis exist for the raising of any such issue, (iii) SJNB and its
Subsidiaries have duly and timely withheld from all payments (including
employee salaries, wages and other compensation) and paid over to the
appropriate taxing authorities all amounts required to be so withheld and paid
over for all periods for which the statute of limitations has not expired under
all applicable laws and regulations, (iv) as of the Closing Date, none of SJNB
nor any of its Subsidiaries shall be a party to, be bound by or have any
obligation under, any tax sharing agreement or similar contract or arrangement
or any agreement that obligates any of them to make any payment computed by
reference to the taxes, taxable income or taxable losses of any other person,
(v) except as set forth on Section 3.2(i) of the SJNB Disclosure Schedule,
there is no contract or agreement, plan or arrangement by SJNB or any of its
Subsidiaries covering any person that, individually or collectively, could give
rise to the payment of any amount that would not be deductible by SJNB or any
of its Subsidiaries by reason of section 280G of the Code, (vi) SJNB and its
Subsidiaries have collected all material sales and use taxes required to be
collected, and have remitted, or will remit on a timely basis, such amounts to
the appropriate governmental authorities, or have been furnished properly
completed exemption certificates and have maintained all such records and
supporting documents in all material respects in the manner required by all
applicable sales and use tax statutes and regulations for all periods for which
the statute of limitations has not expired, (vii) neither SJNB nor any of its
Subsidiaries has been a United States real property holding corporation within
the meaning of section 897(c)(2) of the Code during the applicable period
specified in section 897(c)(1)(A)(ii) of the Code, and (viii) none of SJNB nor
any of its Subsidiaries (A) has been a member of an affiliated group (other
than the group to which they are currently members) filing a consolidated
federal income tax return or (B) has any liability for the taxes of any person
(other than the members of such current group) under Treasury Regulation
section 1.1502-6(a) (or any similar provision of state, local or foreign law),
as a transferee or successor, by contract, or otherwise. None of SJNB nor any
of its Subsidiaries has filed a consent to the application of section 341(f) of
the Code.

   (j) Certain Agreements. Section 3.2(j) of the SJNB Disclosure Schedule sets
forth a listing of all of the following contracts and other agreements, oral or
written (which are currently in force or which may in the future be operative
in any respect) to which SJNB or any of its Subsidiaries is a party or by or to
which SJNB or any of its Subsidiaries or any of their respective assets or
properties are bound or subject: (i) consulting agreements not terminable on
six months or less notice involving the payment of more than $25,000 per

                                      A-23
<PAGE>

annum, or union, guild or collective bargaining agreements covering any
employees in the United States, (ii) agreements with any officer or other key
employee of SJNB or any of its Subsidiaries (x) providing any term of
employment or (y) the benefits of which are contingent, or the terms of which
are materially altered, upon the occurrence of a transaction involving SJNB of
the nature contemplated by this Agreement, (iii) any agreement or plan, any of
the benefits of which will be increased, or the vesting of the benefits of
which will be accelerated, by the occurrence of any of the transactions
contemplated by this Agreement or the value of any of the benefits of which
will be calculated on the basis of any of the transactions contemplated by this
Agreement, (iv) contracts and other agreements for the sale or lease (other
than where SJNB or any of its Subsidiaries is a lessor) of any assets or
properties (other than in the ordinary course of business) or for the grant to
any person (other than to SJNB or any of its Subsidiaries) of any preferential
rights to purchase any assets or properties, (v) contracts and other agreements
relating to the acquisition by SJNB or any of its Subsidiaries of any operating
business or entity or any interest therein, (vi) contracts or other agreements
under which SJNB or any of its Subsidiaries agrees to indemnify any party,
other than in the ordinary course of business, consistent with past practice,
or to share a tax liability of any party, (vii) contracts and other agreements
containing covenants restricting SJNB or any of its Subsidiaries from competing
in any line of business or with any person in any geographical area or
requiring SJNB or any of its Subsidiaries to engage in any line of business,
(viii) contracts or other agreements (other than contracts in the ordinary
course of their banking business) relating to the borrowing of money by SJNB or
any of its Subsidiaries, or the direct or indirect guaranty by SJNB or any of
its Subsidiaries of any obligation for, or an agreement by SJNB or any of its
Subsidiaries to service, the repayment of borrowed money, or any other
contingent obligations of SJNB or any of its Subsidiaries in respect of
indebtedness of any other person, and (ix) any other material contract or other
agreement whether or not made in the ordinary course of business, including any
contract required to be filed by SJNB pursuant to Item 601(b)(10) of Regulation
S-K of the SEC. There have been delivered or made available to Saratoga true
and complete copies of all of the contracts and other agreements set forth in
Section 3.2(j) of the SJNB Disclosure Schedule and in any other Section of the
SJNB Disclosure Schedule. Except as set forth in Section 3.2(j) of the SJNB
Disclosure Schedule, each such contract and other agreement is in full force
and effect and constitutes a legal, valid and binding obligation of SJNB or its
Subsidiaries, as the case may be, and to the best knowledge of SJNB, each other
party thereto, enforceable in accordance with its terms subject, as to
enforceability, to bankruptcy, insolvency and other laws of general
applicability relating to or affecting creditors' rights and to general equity
principles. Neither SJNB nor any Subsidiary of SJNB has received any notice,
whether written or oral, of termination or intention to terminate from any
other party to such contract or agreement. None of SJNB or any of its
Subsidiaries or (to the best knowledge of SJNB) any other party to any such
contract or agreement is in violation or breach of or default under any such
contract or agreement (or with or without notice or lapse of time or both,
would be in violation or breach of or default under any such contract or
agreement), which violation, breach or default has had or would have,
individually or in the aggregate, a material adverse effect on SJNB.

   (k) Benefit Plans.

      (i) Section 3.2(k) of the SJNB Disclosure Schedule contains a true and
  complete list of each Benefit Plan that is sponsored or is being maintained
  or contributed to, or required to be contributed to, by SJNB or any of its
  Subsidiaries (the "SJNB Benefit Plans"). No SJNB Benefit Plan is a
  multiemployer plan or is subject to a collective bargaining agreement.

       (ii) With respect to each SJNB Benefit Plan, SJNB has delivered to
  Saratoga a current, accurate and complete copy (or, to the extent no such
  copy exists, an accurate description) thereof and, to the extent
  applicable, (A) any related trust agreement or other funding instrument;
  (B) the most recent determination letter; (C) any summary plan description
  and other written communications (or a description of any oral
  communications) by SJNB or any of its Subsidiaries to any of their
  respective employees concerning the extent of the benefits provided under
  any SJNB Benefit Plan; and (D) except as described in Section 3.2(k)(ii) of
  the SJNB Disclosure Schedule, for the two most recent years (I) the Form
  5500 and attached schedules; (II) audited financial statements; and (III)
  actuarial valuation reports.


                                      A-24
<PAGE>

     (iii) Except as set forth in Section 3.2(k) of the SJNB Disclosure
  Schedule, (A) each SJNB Benefit Plan has been established and administered
  in accordance with its terms, and in compliance in all material respects
  with the applicable provisions of ERISA, the Code and other applicable
  laws, rules and regulations; (B) each SJNB Benefit Plan which is intended
  to be qualified within the meaning of Code section 401(a) is so qualified
  and has received a favorable determination letter as to its qualification
  and nothing has occurred, whether by action or failure to act, which would
  cause the loss of such qualification; (C) with respect to any SJNB Benefit
  Plan, no audits, actions, suits or claims (other than routine claims for
  benefits in the ordinary course) are pending or threatened, and no facts or
  circumstances exist which could give rise to any such audits, actions,
  suits or claims; (D) neither SJNB nor any other party has engaged in a
  prohibited transaction which could subject SJNB or any of its Subsidiaries,
  or the Surviving Corporation, to any taxes, penalties or other liabilities
  under Code section 4975 or ERISA sections 409 or 502(i); (E) no event has
  occurred and no condition exists that could subject SJNB or any of its
  Subsidiaries, or the Surviving Corporation, either directly or by reason of
  any such entity's affiliation with any member of any such entity's
  Controlled Group (defined as any organization which is a member of a
  controlled group of organizations within the meaning of Code sections
  414(b), (c), (m) or (o)), to any tax, fine, liability or penalty imposed by
  ERISA, the Code or other applicable laws, rules and regulations; (F) all
  insurance and PBGC premiums required to be paid with respect to SJNB
  Benefit Plans through the Closing Date have been or will be paid prior
  thereto and adequate reserves will have been provided for on SJNB's
  consolidated statement of financial condition as of the month end
  immediately prior to the Closing Date for any premiums (or portions
  thereof) attributable to service on or prior to the Closing Date; (G) all
  contributions required to be made prior to the Closing Date under the terms
  of each SJNB Benefit Plan, the Code, ERISA or other applicable laws, rules
  and regulations have been or will be timely made and adequate reserves will
  have been provided for on SJNB's consolidated statement of financial
  condition as of the month end immediately prior to the Closing Date for all
  benefits attributable to service on or prior to the Closing Date; (H) no
  SJNB Benefit Plan has incurred any "accumulated funding deficiency" as such
  term is defined in ERISA section 302 and (including, but not limited to the
  voting of any securities held pursuant to an SJNB Benefit Plan) Code
  section 412 (whether or not waived); (I) the consummation of this Agreement
  will not result in a nonexempt prohibited transaction or a breach of
  fiduciary duty under ERISA; and (J) no SJNB Benefit Plan provides health
  coverage beyond the termination of employment except as provided under Code
  section 4980B.

       (iv) Except as set forth in Section 3.2(k)(iv) of the SJNB Disclosure
  Schedule, with respect to each of the SJNB Benefit Plans which is subject
  to Title IV of ERISA, as of the Closing Date, the assets of each such Plan
  shall be at least equal in value to the present value of the accrued
  benefits (vested and unvested) of the participants in such Plan on a
  termination and projected basis, based on the actuarial methods and
  assumptions indicated in the most recent actuarial valuation reports.

      (v) Except as set forth on Section 3.2(k)(v) of the SJNB Disclosure
  Schedule, no SJNB Benefit Plan exists which provides for an increase in
  benefits on or after the Closing Date or could result in the payment to any
  employee of SJNB or any of its Subsidiaries of any money or other property
  or rights or accelerate or provide any other rights or benefits to any such
  employee as a result of the transactions contemplated by this Agreement.
  The aggregate amount of payments due from SJNB under all such contracts and
  the amount due under each such contract, at the Effective Time, are as set
  forth in the schedule included in Section 3.2(k)(v) of the SJNB Disclosure
  Schedule. Except as set forth in Section 3.2(k)(v) of the SJNB Disclosure
  Schedule, none of such payments will constitute an "excess parachute"
  payment within the meaning of Code section 280G.

   (l) Subsidiaries. Section 3.2(l) of the SJNB Disclosure Schedule lists all
the Subsidiaries of SJNB. SJNB owns, directly or indirectly, beneficially and
of record 100% of the issued and outstanding voting securities of each such
Subsidiary. All of the shares of capital stock of each of the Subsidiaries held
by SJNB or by another of its Subsidiaries are fully paid and nonassessable and
are owned by SJNB or one of its Subsidiaries free and clear of any lien, claim
or other encumbrance. Neither SJNB nor any of its Subsidiaries owns any shares
of capital stock or other equity securities of any person (other than, in the
case of SJNB, the capital stock of its

                                      A-25
<PAGE>

Subsidiaries and, in the case of such Subsidiaries, shares or equity securities
acquired in satisfaction of debts previously contracted in good faith in the
ordinary course of their banking business).

   (m) Agreements with Bank or Other Regulators. Except as set forth in Section
3.2(m) of the SJNB Disclosure Schedule, neither SJNB nor any Subsidiary of SJNB
is a party to any written agreement or memorandum of understanding with, or a
party to any commitment letter or similar undertaking to, or is subject to any
order or directive by, or is a recipient of any extraordinary supervisory
letter from, or has adopted any board resolutions at the request of, any Bank
Regulator which restricts materially the conduct by SJNB or its Subsidiaries of
their businesses, or in any manner relates to their capital adequacy, credit
policies, community reinvestment, loan underwriting or documentation or
management, nor has SJNB or any such Subsidiary been advised by any Bank
Regulator that it is contemplating issuing or requesting (or is considering the
appropriateness of issuing or requesting) any such order, decree, agreement,
memorandum of understanding, extraordinary supervisory letter, commitment
letter or similar submission, or any such board resolutions.

   (n) Absence of Certain Changes or Events. Except as set forth in Section
3.2(n) of the SJNB Disclosure Schedule, since December 31, 1998, (i) there has
not been any change, or any event involving a prospective change, in the
business, financial condition or results of operations or prospects of SJNB or
any of its Subsidiaries which has had, or would be reasonably likely to have, a
material adverse effect on SJNB, and (ii) SJNB and each of its Subsidiaries
have conducted their respective businesses in the ordinary course consistent
with their past practices and neither SJNB nor any of its Subsidiaries has
taken any action or entered into any transaction, and no event has occurred,
that would have required Saratoga's consent pursuant to Section 4.2 of this
Agreement if such action had been taken, transaction entered into or event had
occurred, in each case, after the date of this Agreement, nor has SJNB or any
of its Subsidiaries entered into any agreement, plan or arrangement to do any
of the foregoing.

   (o) Undisclosed Liabilities. Except as set forth in Section 3.2(o) of the
SJNB Disclosure Schedule, and except (i) for those liabilities or obligations
that are fully reflected or reserved against in the consolidated statement of
financial condition at December 31, 1998 of SJNB referred to in Section 3.2(d)
or (ii) for liabilities or obligations incurred in the ordinary course of
business consistent with past practice since December 31, 1998 and which are
not material to SJNB and its Subsidiaries taken as a whole, none of SJNB or any
of its Subsidiaries has incurred any liability or obligation of any nature
whatsoever (whether absolute, accrued or contingent or otherwise and whether
due or to become due) that, either alone or when combined with all similar
liabilities or obligations, has had, or would have, a material adverse effect
on SJNB. No agreement pursuant to which any loans or other assets have been or
will be sold by SJNB or any Subsidiary entitle the buyer of such loans or other
assets, unless there is material breach of a representation or covenant by SJNB
or its Subsidiaries not relating to the payment or other performance by an
obligor of such loan or other asset of its obligations thereunder, to cause
SJNB or its Subsidiaries to repurchase such loan or other asset or the buyer to
pursue any other form of recourse against SJNB or its Subsidiaries.

   (p) Governmental Reports. SJNB and each of its Subsidiaries have timely
filed all material reports, registrations and statements, together with any
amendments required to be made with respect thereto, that they were required to
file since January 1, 1995 with any Governmental Entity and have paid all fees
and assessments due and payable in connection therewith. Except as set forth in
Section 3.2(p) of the SJNB Disclosure Schedule and except for normal
examinations conducted by a Governmental Entity in the regular course of
business of SJNB and its Subsidiaries, no Governmental Entity has initiated any
proceeding or, to the best knowledge of SJNB, investigation into the business
or operations of SJNB or any of its Subsidiaries since January 1, 1995. Except
as set forth in Section 3.2(p) of the SJNB Disclosure Schedule, there is no
material unresolved violation, criticism or exception by any Governmental
Entity with respect to any report or statement relating to any examinations of
SJNB or any of its Subsidiaries.


                                      A-26
<PAGE>

   (q) Environmental Liability. (i) Except as set forth in Section 3.2(q) of
the SJNB Disclosure Schedule, to the best knowledge of SJNB, there are no
pending or threatened claims, actions or proceedings against SJNB relating to:

        (A) any asserted liability of SJNB or any of its Affiliates or any
    current or prior owner, operator, occupier or user of any Real Property
    under any Environmental Law, including without limitation, the terms
    and conditions of any permit, license, authority, settlement or other
    obligation arising under any Environmental Law;

        (B) any handling, storage, use or disposal of Hazardous Substances
    on, under or within any Real Property or any transportation or removal
    of Hazardous Substances to or from any Real Property;

        (C) any actual or threatened discharge, release or emission of
    Hazardous Substances from, on, under or within any Real Property into
    the air, water, surface water, groundwater, land surface or subsurface
    strata; or

        (D) any actual or asserted claims for personal injuries, illness or
    damage to real or personal property related to or arising out of
    exposure to Hazardous Substances discharged, released or emitted from,
    on, under, within or into, or transported from or to, any Real
    Property.

     (ii) Except as set forth in Section 3.2(q) of the SJNB Disclosure
  Schedule, to the best knowledge of SJNB, no Hazardous Substances are
  present on, under or within any Real Property (except those Hazardous
  Substances used in the normal course of operating or maintaining the
  business of SJNB or any Subsidiary of SJNB) and, except as set forth in
  Section 3.2(q) of the SJNB Disclosure Schedule, the presence of these
  Hazardous Substances does not violate any Environmental Law. Except as set
  forth in Section 3.2(q) of the SJNB Disclosure Schedule, to the best
  knowledge of SJNB, there are no storage tanks underground or otherwise
  present on any Real Property and all such tanks set forth in Section 3.2(q)
  of the SJNB Disclosure Schedule comply in all material respects with
  applicable law, all permits in respect thereof are in full force and effect
  and there have been no releases or discharges of Hazardous Substances from
  such tanks to the environment.

     (iii) To the best knowledge of SJNB, except as set forth in Section
  3.2(q) of the SJNB Disclosure Schedule, no Hazardous Substances have been,
  or have been threatened to be, discharged, released or emitted in a
  Reportable Quantity into the air, water, surface water, groundwater, land
  surface or subsurface strata or transported to or from the Real Property
  except in accordance with Environmental Laws (in particular, but without
  limitation, in accordance with any permits issued pursuant thereto). To the
  best knowledge of SJNB, all notifications, remediation, removal or other
  response actions of any kind whatsoever, in respect of such discharges,
  releases and emissions which are required by Environmental Laws, and by
  applicable agreements with third parties, have been made within the time
  limits prescribed by such Environmental Laws and such third party
  agreements. Copies of all such notifications or documents relating to any
  remediation, removal or response action have previously been provided to
  SJNB.

     (iv) To the best knowledge of SJNB, except as set forth in Section
  3.2(q) of the SJNB Disclosure Schedule, SJNB and its Affiliates are in
  compliance, in all material respects, with all Environmental Laws related
  to the ownership, operation, use and occupation of the Real Property.

     (v) To the best knowledge of SJNB, except as set forth in Section 3.2(q)
  of the SJNB Disclosure Schedule, no part of any Real Property is listed on
  CERCLIS or the National Priorities List created pursuant to the
  Comprehensive Environmental Response Compensation and Liability Act of
  1980, as amended, as a site containing Hazardous Substances.

     (vi) SJNB has provided Saratoga with copies of all material notices
  posted by it under any Environmental Law with respect to the Real Property
  at which the business of SJNB or its Subsidiaries is conducted, including
  without limitation, notices required under California Health & Safety Code
  section 25359.7.

                                      A-27
<PAGE>

     (vii) All properties held by SJNB or its Subsidiaries under leases are
  held by them under valid, binding and enforceable leases, with such
  exceptions as are not material and do not interfere with the conduct of the
  business of SJNB, and SJNB enjoys quiet and peaceful possession of such
  leased property. SJNB and its Subsidiaries are not in default in any
  material respect under any material lease, agreement or obligation
  regarding their properties to which they are a party or by which they are
  bound.

     (viii) Except as set forth in Section 3.2(q) of the SJNB Disclosure
  Schedule, all of SJNB's and its Subsidiaries' rights and obligations under
  the leases referred to in Section 3.2(q)(vii) above do not require the
  consent of any other party to the transactions contemplated by this
  Agreement.

   (r) Properties. Except as set forth in Section 3.2(r) of the SJNB Disclosure
Schedule, SJNB or its Subsidiaries (i) has good and marketable title to all
Real Property owned in fee, and good title to all other properties and assets
reflected in the SJNB Consolidated Financial Statements as being owned by SJNB
or its Subsidiaries or acquired after the date thereof which are material to
the business of SJNB on a consolidated basis (except properties sold or
otherwise disposed of since the date thereof in the ordinary course of
business), free and clear of all claims, liens, charges, security interests or
encumbrances of any nature whatsoever except (A) statutory liens securing
payments not yet delinquent, (B) liens on assets of San Jose National Bank
securing deposits incurred in the ordinary course of its banking business and
(C) such imperfections or irregularities of title, claims, liens, charges,
security interests or encumbrances as do not materially affect the use of the
properties or assets subject thereto or affected thereby or otherwise
materially impair business operations at such properties and (ii) is the lessee
of all leasehold estates reflected in the SJNB Consolidated Financial
Statements or acquired after the date thereof which are material to its
business on a consolidated basis (except for leases that have expired by their
terms since the date thereof) and is in possession of the properties purported
to be leased thereunder, and each such lease is valid without material default
thereunder by the lessee or, to the best knowledge of SJNB, the lessor. Except
as set forth in Section 3.2(r) of the SJNB Disclosure Schedule, all real
properties owned by SJNB or its Subsidiaries are owned in accordance in all
material respects with all requirements of applicable rules, regulations and
policies of the Bank Regulators.

   (s) Transactions with Affiliates. Except as set forth in Section 3.2(s) of
the SJNB Disclosure Schedule and except for those arrangements, contracts,
agreements or transactions which were entered into in the ordinary course of
business, since December 31, 1998, SJNB has not extended credit, committed to
extend credit or transferred any asset to or assumed or guaranteed any
liability of or entered into any other transactions with the employees or
directors of SJNB, or any spouse or child of any of them, or to any of their
"affiliates" or "associates" as such terms are defined in Rule 405 under the
Securities Act. Any such transactions, including those in the ordinary course
of business, have been on terms no less favorable than those which would
prevail in an arm's-length transaction with an independent third party.

   (t) No Broker or Finder. No agent, broker, investment banker, financial
advisor or other firm or person is or will be entitled to any broker's or
finder's fee or any other similar commission or fee in connection with any of
the transactions contemplated by this Agreement

   (u) Intellectual Property. Except as set forth in Section 3.2(u) of the SJNB
Disclosure Schedule, SJNB and its Subsidiaries own or have a valid license to
use all trademarks, service marks and trade names (including any registrations
or applications for registration of any of the foregoing) (collectively, the
"SJNB Intellectual Property") necessary to carry on their business
substantially as currently conducted, except for such SJNB Intellectual
Property the failure of which to own or validly license, individually or in the
aggregate, would not reasonably be expected to have a material adverse effect
on SJNB. Neither SJNB nor any such Subsidiary has received any notice of
infringement of or conflict with, and, to the best knowledge of SJNB, there are
no infringements of or conflicts with, the rights of others with respect to the
use of any SJNB Intellectual Property that, individually or in the aggregate,
in either such case, would reasonably be expected to have a material adverse
effect on SJNB.

   (v) Pooling of Interests. Except as set forth in Section 3.2(v) of the SJNB
Disclosure Schedule, as of the date of this Agreement, SJNB has no reason (in
respect to matters pertaining to SJNB existing as of the date

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<PAGE>

hereof or expected to exist as of the Closing Date) to believe that SJNB will
not qualify for pooling of interests treatment for accounting purposes under
GAAP as presently in effect.

   (w) Community Reinvestment Act Compliance. San Jose National Bank is in
substantial compliance with the applicable provisions of the CRA and has
received a CRA rating of "satisfactory" from the OCC in its most recent
examination, and SJNB has no knowledge of the existence of any fact or
circumstance or set of facts or circumstances which could be reasonably
expected to result in San Jose National Bank failing to be in substantial
compliance with such provisions or having its current rating lowered.

   (x) Year 2000 Readiness. SJNB and its Subsidiaries have a plan and
organization in place to minimize any material adverse effect caused by the
failure of any system, equipment or product which is material to their
respective operations or financial condition to be Year 2000 Ready. Such plan
addresses, at a minimum, the issues set forth in the statements of the FFIEC,
dated May 5, 1997, entitled "Year 2000 Project Management Awareness," and
December 1997, entitled "Safety and Soundness Guidelines Concerning the Year
2000 Business Risk," as well as any other statements of the FFIEC related to
the Year 2000, as such issues might affect SJNB and its Subsidiaries. SJNB has
provided to Saratoga a complete and accurate copy of the plan, which includes
SJNB's Year 2000 organization and an estimate of anticipated associated costs.
SJNB is using its best efforts to implement such plan, which includes seeking
assurances from its vendors and suppliers that such vendors' and suppliers'
products and services which are material to its operations are Year 2000 Ready,
replacing any material products and services supplied by such vendors or
suppliers which are not Year 2000 Ready with new products and services which
are Year 2000 Ready, and/or working with such vendors and suppliers to achieve
Year 2000 Readiness with respect to such material products and services. Such
plan shall also establish procedures to evaluate, manage and mitigate Year
2000-related risks to SJNB posed by material customers of SJNB or any of its
Subsidiaries who may not themselves be Year 2000 Ready. Neither SJNB nor its
Subsidiaries have received, or expect to receive, a "Year 2000 Deficiency
Notification Letter" (as such term is employed in the Federal Reserve's
Supervision and Regulation Letter No. SR 98-3 (SUP), dated March 4, 1998).

   (y) Insurance. SJNB has previously delivered to Saratoga a list identifying
all insurance policies maintained on behalf of SJNB and its Subsidiaries (other
than mortgage, title and other similar policies for the benefit of SJNB or its
Subsidiaries as mortgagees under residential mortgage loans). All of the
material insurance policies and bonds maintained by or for the benefit of SJNB
and its Subsidiaries are in full force and effect, to the best knowledge of
SJNB, SJNB and its Subsidiaries are not in default thereunder, and all material
claims thereunder have been filed in due and timely fashion, and neither SJNB
nor any of its Subsidiaries has received notice that any of such material
claims have been or will be denied. The insurance policies and bonds maintained
by SJNB and its Subsidiaries are written by reputable insurers and are in such
amounts, cover such risks and have such other terms as is customary for banks
and bank holding companies comparable in size and operations to SJNB and its
Subsidiaries. Since December 31, 1998, there has not been any damage to,
destruction of, or loss of any assets of SJNB and its Subsidiaries (whether or
not covered by insurance) that could have a material adverse effect on SJNB.
Neither SJNB nor any of its Subsidiaries has received any notice of a premium
increase or cancellation with respect to any of its insurance policies or
bonds, and within the last three years, neither SJNB nor any of its
Subsidiaries has been refused any insurance coverage sought or applied for, and
SJNB has no reason to believe that existing insurance coverage cannot be
renewed as and when the same shall expire, upon terms and conditions as
favorable as those presently in effect, other than possible increases in
premiums or unavailability in coverage that have not resulted from an
extraordinary loss experience of SJNB or any SJNB Subsidiary.

   (z) Loans and Other Assets.

     (i) SJNB has disclosed to Saratoga prior to the date hereof the amounts
  of all loans, leases, other extensions of credit, commitments or other
  interest-bearing assets presently owned by SJNB or any of its Subsidiaries
  that have been classified by any Bank Regulator, SJNB's independent
  auditors, or the management of SJNB or any Subsidiary of SJNB as "Other
  Loans Especially Mentioned," "Substandard," "Doubtful," or "Loss", or
  classified using categories with similar import, and will have disclosed
  promptly to Saratoga prior to the Closing Date all such items which will be
  so classified

                                      A-29
<PAGE>

  hereafter and prior to the Closing Date. All such assets or portions
  thereof classified "Loss," or which are subsequently so classified, have
  been (or will be) charged off on a timely basis in full, collected or
  otherwise placed in a bankable condition. SJNB regularly reviews and
  appropriately classifies its and its Subsidiaries' loans and other assets
  in accordance in all material respects with all applicable legal and
  regulatory requirements and GAAP. SJNB has disclosed to Saratoga the
  amounts and identities of all OREO that has been classified as such as of
  the date hereof by SJNB's independent auditors, management of SJNB or any
  Bank Regulator and will have promptly disclosed to Saratoga prior to the
  Closing Date all such assets which will be so classified hereafter and
  prior to the Closing Date. As of the date hereof and the Closing Date, the
  recorded values of all OREO on the books of SJNB and its Subsidiaries
  accurately reflect and will reflect the net realizable values of each OREO
  parcel thereof in compliance with GAAP. SJNB and its Subsidiaries have
  recorded on a timely basis all expenses associated with or incidental to
  its OREO, including but not limited to taxes, maintenance and repairs as
  required by GAAP.

     (ii) All loans, leases, other extensions of credit, commitments or other
  interest-bearing assets and investments of SJNB and its Subsidiaries are
  legal, valid and binding obligations enforceable in accordance with their
  respective terms and are not subject to any setoffs, counterclaims or
  disputes known to SJNB (subject to applicable bankruptcy, insolvency and
  similar laws affecting creditors' rights generally and subject, as to
  enforceability, to equitable principles of general applicability), except
  as previously disclosed to Saratoga in Section 3.2(z)(ii) of the SJNB
  Disclosure Schedule or reserved for in the consolidated statement of
  financial condition of SJNB as of December 31, 1998 referred to in
  Section 3.2(d) in accordance with GAAP, and were duly authorized under and
  made in compliance with applicable federal and state laws and regulations.
  SJNB and its Subsidiaries do not have any extensions or letters of credit,
  investments, guarantees, indemnification agreements or commitments for the
  same (including without limitation commitments to issue letters of credit,
  to create acceptances, or to repurchase securities, federal funds or other
  assets) other than those documented on the books and records of SJNB and
  its Subsidiaries.

   (aa) Derivatives Contracts; Structured Notes; Etc. Except as set forth in
Section 3.2(aa) of the SJNB Disclosure Schedule, neither SJNB nor any
Subsidiary is a party to or has agreed to enter into a Derivatives Contract or
owns securities that (1) are referred to generically as "structured notes,"
"high risk mortgage derivatives," "capped floating rate notes" or "capped
floating rate mortgage derivatives" or (2) are likely to have changes in value
as a result of interest or exchange rate changes that significantly exceed
normal changes in value attributable to interest or exchange rate changes,
except for those Derivatives Contracts and other instruments legally purchased
or entered into in the ordinary course of their banking business, consistent
with safe and sound banking practices and regulatory guidance, and with
counterparties reasonably believed by SJNB to be financially responsible. All
of such Derivatives Contracts or other instruments are legal, valid and binding
obligations of SJNB or one of its Subsidiaries and, to the best knowledge of
SJNB, each of the other counterparties thereto, enforceable in accordance with
their terms (except as enforcement may be limited by general principles of
equity whether applied in a court of law or a court of equity and by
bankruptcy, insolvency and similar laws affecting creditors' rights and
remedies generally), and are in full force and effect. SJNB and each of its
Subsidiaries and, to the best knowledge of SJNB, each of the other
counterparties thereto, have duly performed in all material respects all of
their material obligations thereunder to the extent that such obligations to
perform have accrued; and there are no breaches, violations or defaults or
allegations or assertions of such by any party thereunder which would have or
would reasonably be expected to have a material adverse effect on SJNB.

   (ab) Labor Matters. Neither SJNB nor any of its Subsidiaries is a party to,
or is bound by, any collective bargaining agreement, contract or other
agreement or understanding with a labor union or labor organization, nor is it
or any of its Subsidiaries the subject of a proceeding asserting that it or any
such Subsidiary has committed an unfair labor practice (within the meaning of
the National Labor Relations Act) or seeking to compel it or such Subsidiary to
bargain with any labor organization as to wages and conditions of employment,
nor is there any strike or other labor dispute involving it or any of its
Subsidiaries pending or, to the best of its knowledge, threatened, nor is it
aware of any activity involving it or any of its Subsidiaries' employees
seeking to certify a collective bargaining unit or engaging in any other
organization activity.


                                      A-30
<PAGE>

                                   ARTICLE IV

                   COVENANTS RELATING TO CONDUCT OF BUSINESS

   4.1 Covenants of Saratoga. During the period from the date of this Agreement
and continuing until the Effective Time (except as expressly contemplated or
permitted by this Agreement or to the extent that SJNB shall otherwise consent
in writing, which consent shall not be unreasonably withheld) Saratoga agrees
that it will and will cause each of its Subsidiaries to carry on the business
of Saratoga and each of its Subsidiaries in the usual, regular and ordinary
course in substantially the same manner as heretofore conducted and use all
reasonable efforts to preserve intact the present business organizations of
Saratoga and each of its Subsidiaries, maintain the rights and franchises of,
and preserve the relationships with customers, suppliers and others having
business dealings with, Saratoga and each of its Subsidiaries to the end that
their goodwill and ongoing businesses shall not be impaired in any material
respect at the Effective Time. Without limiting the generality of the
foregoing, during the period from the date of this Agreement to the Effective
Time, Saratoga shall not, and shall not permit any of its Subsidiaries to,
without the prior consent of SJNB in writing:

    (a) (i) declare or pay any dividends on or make other distributions in
respect of any of its capital stock, except for cash dividends in an amount per
share not greater than, and consistent with the manner and frequency of,
dividends paid by Saratoga in the past 12 months and dividends by a wholly
owned Subsidiary of Saratoga to Saratoga, (ii) set any record or payment dates
for the payment of any dividends or distribution on its capital stock except in
the ordinary course of business consistent with past practice, (iii) split,
combine or reclassify any of its capital stock or issue or authorize or propose
the issuance of any other securities in respect of, in lieu of or in
substitution for, shares of its capital stock or (iv) repurchase, redeem or
otherwise acquire, or permit any Subsidiary to purchase or otherwise acquire,
any shares of its capital stock or the capital stock of any other Subsidiary of
Saratoga or any securities convertible into or exercisable for any shares of
such capital stock;

    (b) issue, deliver or sell, or authorize or propose the issuance, delivery
or sale of, any shares of its capital stock of any class, any securities
convertible into or exercisable for, or any rights, warrants or options to
acquire, any such shares, or enter into any agreement with respect to any of
the foregoing, other than issuances of Saratoga Common Stock pursuant to the
exercise of Saratoga Options;

    (c) except as required to perform its obligations under this Agreement,
amend or propose to amend its Articles of Incorporation or its By-laws or other
organizational documents or that of any Subsidiary;

    (d) (i) enter into any new material line of business, (ii) change its
lending, investment, liability management and other material banking policies
in any respect which is material to Saratoga, except as required by law or by
policies imposed by a Bank Regulator, or (iii) except as set forth in Section
4.1(d) of the Saratoga Disclosure Schedule, incur or commit to any capital
expenditures or any obligations or liabilities in connection therewith other
than capital expenditures and obligations or liabilities incurred or committed
to in the ordinary course of business consistent with past practice but in no
event for more than $10,000 as to any one such item or $50,000 as to all such
items in the aggregate;

    (e) acquire or agree to acquire by merging or consolidating with, or by
purchasing a substantial equity interest in or a substantial portion of the
assets of, or by any other means, any business or any corporation, partnership,
association or other business organization or division thereof; provided,
however, that the foregoing shall not prohibit foreclosures and other debt-
previously-contracted acquisitions in the ordinary course of business
consistent with past practice;

    (f) sell, lease, encumber or otherwise dispose of, or agree to sell, lease,
encumber or otherwise dispose of, any of its assets (including capital stock of
Subsidiaries of Saratoga), which are material, individually or in the
aggregate, to Saratoga, other than in the ordinary course of business
consistent with past practice;

    (g) incur any long-term indebtedness for borrowed money or guarantee any
such long-term indebtedness or issue or sell any long-term debt securities or
warrants or rights to acquire any long-term debt securities of Saratoga or any
of its Subsidiaries or guarantee any long-term debt securities of others other
than

                                      A-31
<PAGE>

(i) indebtedness of any Subsidiary of Saratoga to Saratoga or to another
Subsidiary of Saratoga, (ii) deposits taken in the ordinary course of business
consistent with past practice, or (iii) renewals or extensions of existing
long-term indebtedness without any change in the material terms thereof;

    (h) intentionally take or fail to take any action that would, or reasonably
might be expected to, result in any of the representations and warranties set
forth in this Agreement being or becoming untrue in any material respect, or in
any of the conditions to the Closing set forth in Article VI (including without
limitation the conditions set forth in Sections 6.1(f) and 6.3(d)) not being
satisfied, or (unless such action is required by applicable law or sound
banking practice) which would adversely affect the ability of SJNB or Saratoga
to obtain any of the Requisite Regulatory Approvals without imposition of a
condition or restriction of the type referred to in Section 6.1(g);

    (i) change the methods of accounting of Saratoga or any of its
Subsidiaries, except as required by changes in GAAP as concurred in by such
party's independent auditors;

    (j) (i) enter into, adopt, amend (except for technical amendments and such
amendments as may be required by law) or terminate any Saratoga Benefit Plan or
any other Benefit Plan or any agreement, arrangement, plan or policy between
Saratoga or any of its Subsidiaries and one or more of its directors or
officers, increase in any manner the compensation or fringe benefits of any
director, officer or employee of Saratoga or any of its Subsidiaries (provided,
that Saratoga or any of its Subsidiaries may increase the compensation of any
such director, officer or employee in a manner consistent with Saratoga's
present policies, procedures and plans in effect for the calendar year 1999,
all of which policies, procedures and plans have been previously provided to
SJNB and, in connection with any increase in compensation of officers, said
increases shall be deemed consistent with Saratoga's present policies so long
as the annual increase for each officer is four percent (4%) or less; provided,
however that, notwithstanding the foregoing, Saratoga or its Subsidiaries shall
not increase the compensation or fringe benefits of any director, officer or
employee of Saratoga or any of its Subsidiaries with an annual base salary in
excess of $40,000 (except for annual compensation increases for officers of
four percent (4%) or less) without obtaining the prior written consent of SJNB
(which consent shall not be unreasonably withheld)) or pay or grant any benefit
not required by any plan and arrangement as in effect as of the date hereof
(including, without limitation, the granting of stock options, stock
appreciation rights, restricted stock, restricted stock units or performance
units or shares or any similar awards) or enter into any contract, agreement,
commitment or arrangement to do any of the foregoing, (ii) enter into or renew
any contract, agreement, commitment or arrangement providing for the payment to
any director, officer or employee of Saratoga or any of its Subsidiaries of
compensation or benefits contingent, or the terms of which are materially
altered, upon the occurrence of any of the transactions contemplated by this
Agreement, or (iii) with respect to any Saratoga Benefit Plan which is a
defined benefit or defined contribution pension plan, permit or cause (A) a
consolidation or merger of any such Saratoga Benefit Plan, (B) a spin-off
involving any such Saratoga Benefit Plan, (C) a transfer of assets and/or
liabilities from or to any such Saratoga Benefit Plan, or (D) any similar
transaction involving any such Saratoga Benefit Plan;

    (k) enter into any contract that would be required to be disclosed on
Section 3.1(j) of the Saratoga Disclosure Schedule or renew or terminate any
contract listed in Section 3.1(j) of the Saratoga Disclosure Schedule through
any volitional conduct, other than renewals of contracts or leases for a term
of one year or less without material adverse changes to the terms thereof;

    (l) commit to or renew any real estate secured or construction loan with a
principal amount exceeding $1,500,000 or any commercial loan with a principal
amount exceeding $500,000; provided, however, that if any new loan commitment
or loan renewal involves a loan to a borrower (or his associates (as defined in
Rule 405 under the Securities Act) and Affiliates) who has (A) any other
classified or criticized asset, (B) a total lending relationship of $250,000 or
more, or (C) a renewal involving a classified or criticized asset, then the
relevant loan amount subject to this subsection shall be $250,000; provided,
further, however, that any such loan or renewal which is in excess of the
applicable amount specified in this subsection shall not be made or committed
to be made unless Saratoga shall have given SJNB at least one Business Day's
advance written notice of the proposal to make such loan commitment or renewal,
which written notice shall provide SJNB the

                                      A-32
<PAGE>

same information provided to the relevant loan committee (or loan officer, if
no committee approval is required) of Saratoga or the applicable Saratoga
Subsidiary, and shall have furnished SJNB with such other information as SJNB
may reasonably have requested;

    (m) issue or agree to issue any letters of credit or otherwise guarantee
the obligations of any other persons except in the ordinary course of business
consistent with past practice;

    (n) engage or participate in any material transaction or incur or sustain
any material obligation not in the ordinary course of business consistent with
past practice;

    (o) settle any claim, action or proceeding involving money damages
involving a payment in excess of $50,000 as to any such matter, or settle any
other matter not involving money damages which is material to Saratoga;

    (p) except as required by GAAP or applicable law or regulation, change or
make any tax elections, change any method of accounting with respect to taxes,
file any amended tax return, or settle or compromise any federal, state, local
or foreign material tax liability;

    (q) except as set forth in Section 4.1(q) of the Saratoga Disclosure
Schedule, make an application for the opening, relocation or closing of, or
open, relocate or close any branch or loan production office;

    (r) except as described in Section 4.1(r) of the Saratoga Disclosure
Schedule, enter into any securitization or similar transactions with respect to
any loans, leases or other assets of Saratoga or any of its Subsidiaries; or

    (s) agree to, or make any commitment to, take any of the actions prohibited
by this Section 4.1.

   4.2 Covenants of SJNB.

    (a) During the period from the date of this Agreement and continuing until
the Effective Time, SJNB agrees as to itself and its Subsidiaries that (except
as expressly contemplated or permitted by this Agreement or to the extent that
Saratoga shall otherwise consent in writing, which consent shall not be
unreasonably withheld), SJNB will and will cause each of its Subsidiaries to
carry on its respective businesses in the usual, regular and ordinary course in
substantially the same manner as heretofore conducted and use all reasonable
efforts to preserve intact its present business organizations, maintain its
rights and franchises and preserve its relationships with customers, suppliers
and others having business dealings with them to the end that their goodwill
and ongoing businesses shall not be impaired in any material respect at the
Effective Time. Without limiting the generality of the foregoing, during the
period from the date of this Agreement to the Effective Time, SJNB shall not,
and shall not permit any of its Subsidiaries to, without the prior consent of
Saratoga in writing:

      (i) except as required to perform its obligations under this Agreement,
  amend or propose to amend its Articles of Incorporation or its By-laws in a
  manner that would materially and adversely affect its ability to perform
  its obligations under this Agreement or consummate the transactions
  contemplated hereunder, or otherwise materially and adversely affect the
  rights, powers and privileges of the shares of SJNB Common Stock to be
  issued in the Merger;

       (ii) declare or pay any dividends on or make other distributions in
  respect of any of its capital stock, except for cash dividends in an amount
  substantially equivalent to dividends paid in the year prior to the date
  hereof and dividends by a wholly owned Subsidiary of SJNB to SJNB, (ii) set
  any record or payment dates for the payment of any dividends or
  distribution on its capital stock except in the ordinary course of business
  consistent with past practice, (iii) split, combine or reclassify any of
  its capital stock or issue or authorize or propose the issuance of any
  other securities in respect of, in lieu of or in substitution for, shares
  of its capital stock or (iv) repurchase, redeem or otherwise acquire, or
  permit any Subsidiary to purchase or otherwise acquire, any shares of its
  capital stock or the capital stock of any other Subsidiary of SJNB or any
  securities convertible into or exercisable for any shares of such capital
  stock; provided, however, that nothing in this Agreement shall restrict
  SJNB from taking actions involving the authorization, approval or adoption
  of a shareholders' rights plan or taking any other action incidental
  thereto;

                                      A-33
<PAGE>

     (iii) change the methods of accounting of SJNB or any of its
  Subsidiaries (including any changes in accounting with respect to taxes),
  except as required by changes in GAAP as concurred in by such party's
  independent auditors;

       (iv) intentionally take or fail to take any action that would, or
  reasonably might be expected to, result in any of its representations and
  warranties set forth in this Agreement being or becoming untrue in any
  material respect, or in any of the conditions to the Closing set forth in
  Article VI (including without limitation the conditions set forth in
  Sections 6.1(f) and 6.2(d)) not being satisfied, or (unless such action is
  required by applicable law or sound banking practice) which would adversely
  affect the ability of SJNB or Saratoga to obtain any of the Requisite
  Regulatory Approvals without imposition of a condition or restriction of
  the type referred to in Section 6.1(g); or

      (v) agree to, or make any commitment to, take any of the actions
  prohibited by this Section 4.2(a).

   (b) SJNB shall use all commercially reasonable efforts to publish as soon
as practicable after the end of the quarter in which there are at least thirty
(30) days of post-Merger combined operations, combined sales and net income
figures as contemplated by and in accordance with the terms of SEC Accounting
Release No. 135.

   (c) During the period from the date of this Agreement and continuing until
the Effective Time, SJNB shall not accept any offer from or enter into any
agreement with any third party regarding a Takeover Proposal (as defined in
Section 5.4(a), however, references therein to Saratoga shall be deemed for
purposes of this Section 4.2(c) to refer to SJNB) of SJNB with any other
entity unless such offer or agreement is expressly conditioned upon the
performance by SJNB or its successor in interest of its obligations under this
Agreement. Notwithstanding the foregoing, the Board of Directors of SJNB, to
the extent required by its fiduciary obligations, as determined in good faith
by the Board of Directors of SJNB based on the advice of independent counsel,
may (subject to the following sentence) withdraw or modify its approval or
recommendation of this Agreement or the Merger, approve, recommend or enter
into an agreement with respect to any Takeover Proposal pursuant to Section
7.1(e)(ii), or terminate this Agreement, in each case at any time after the
third business day following Saratogas receipt of a written notice advising
Saratoga that the Board of Directors of SJNB has received such a Takeover
Proposal, specifying the material terms and conditions of such Takeover
Proposal and identifying the Person making such Takeover Proposal (it being
understood that any amendment to such Takeover Proposal shall necessitate an
additional three business day period). If SJNB proposes to enter into an
agreement with respect to any Takeover Proposal pursuant to Section
7.1(e)(ii), it shall concurrently with entering into such agreement pay, or
cause to be paid, to Saratoga the Termination Fee in accordance with the
provisions of Section 7.1(e)(ii).

                                   ARTICLE V

                             ADDITIONAL AGREEMENTS

   5.1 Regulatory Matters.

   (a) Saratoga and SJNB shall promptly prepare and file with the SEC a Proxy
Statement, and SJNB shall promptly prepare and file with the SEC the S-4, in
which the Proxy Statement will be included as a prospectus, and one or more
registration statements or amendments to existing registration statements
under the Securities Act for the purpose of registering the maximum number of
shares of SJNB Common Stock to which the option holders of Saratoga may be
entitled pursuant to Section 2.6 at or after the Effective Time. Each of SJNB
and Saratoga shall use all reasonable efforts to have the S-4 declared
effective under the Securities Act as promptly as practicable after such
filing, and Saratoga and SJNB shall thereafter promptly mail the Proxy
Statement to their respective shareholders.

   (b) The parties hereto shall cooperate with each other and use their
reasonable best efforts to promptly prepare and file all necessary
documentation, to effect all applications, notices, petitions and filings, to
obtain as promptly as practicable all permits, consents, approvals and
authorizations of all third parties and Governmental

                                     A-34
<PAGE>

Entities which are necessary or advisable to consummate the transactions
contemplated by this Agreement and the other Transaction Agreements (including
without limitation the Merger and the Bank Merger). SJNB and Saratoga shall
have the right to review in advance and to the extent practicable each will
consult the other on, in each case subject to applicable laws relating to the
exchange of information, all the information relating to Saratoga or SJNB, as
the case may be, and any of their respective Subsidiaries which appears in any
filing made with, or written materials submitted to, any third party or any
Governmental Entity in connection with the transactions contemplated by this
Agreement. In exercising the foregoing right, each of the parties hereto shall
act reasonably and as promptly as practicable. The parties hereto agree that
they will consult with each other with respect to the obtaining of all permits,
consents, approvals and authorizations of all third parties and Governmental
Entities necessary or advisable to consummate the transactions contemplated by
this Agreement (including without limitation the Merger) and each party will
keep the other apprised of the status of matters relating to completion of the
transactions contemplated herein.

   (c) SJNB and Saratoga shall, upon request, furnish each other with all
information concerning themselves, their Subsidiaries, directors, officers and
shareholders and such other matters as may be reasonably necessary or advisable
in connection with the Proxy Statement, the S-4 or any other statement, filing,
notice or application made by or on behalf of SJNB, Saratoga or any of their
respective Subsidiaries to any Governmental Entity in connection with the
Merger and the other transactions contemplated by this Agreement.

   (d) SJNB and Saratoga shall promptly advise each other upon receiving any
communication from any Governmental Entity whose consent or approval is
required for consummation of the transactions contemplated by this Agreement
which causes such party to believe that there is a reasonable likelihood that
any Requisite Regulatory Approval (as defined in Section 6.1(b)) will not be
obtained or that the receipt of any such approval will be materially delayed.

   5.2 Access to Information. Upon reasonable notice, Saratoga and SJNB shall
(and shall cause each of their respective Subsidiaries to) afford to the other
and their representatives and advisors access, during normal business hours
during the period prior to the Closing Date, to all the properties, books,
contracts, commitments and records of Saratoga (in the case of Saratoga) and of
SJNB (in the case of SJNB) and, during such period, each of Saratoga and SJNB
shall (and shall cause each of their respective Subsidiaries to) make available
to the other and their representatives and advisors (a) a copy of each report,
schedule, registration statement and other document filed or received by
Saratoga or SJNB, as the case may be, during such period pursuant to the
requirements of Federal securities laws or Federal or state banking laws (other
than reports or documents which such party is not permitted to disclose under
applicable law or reports or documents which are subject to an attorney-client
privilege or which constitute attorney work product) and (b) all other
information concerning the business, properties and personnel of Saratoga or of
SJNB, as the case may be, as such other party may reasonably request. SJNB will
hold any such information with respect to Saratoga and its Subsidiaries which
is nonpublic in confidence to the extent required by, and in accordance with,
the provisions of the letter dated July 28, 1998, between Saratoga and SJNB
(the "Confidentiality Agreement"). Saratoga will hold all such information with
respect to SJNB and its Subsidiaries which is nonpublic in confidence and will
otherwise deal with such information to the extent required by, and in
accordance with, the provisions of the Confidentiality Agreement, deeming, for
purpose of this sentence, such information to be subject to the provisions of
the Confidentiality Agreement as if such provisions applied by their terms to
such information of SJNB and its Subsidiaries, as well as to such information
of Saratoga and its Subsidiaries. No investigation by either SJNB, on the one
hand, or Saratoga, on the other hand, shall affect the representations and
warranties of the other.

   5.3 Shareholders' Meetings. (a) Saratoga shall call a meeting of its
shareholders to be held as promptly as practicable for the purpose of voting
upon the adoption of this Agreement. Saratoga will, through its Board of
Directors, recommend to its shareholders adoption of this Agreement unless the
Board of Directors of Saratoga determines in good faith, based upon the written
advice of outside counsel, that making such recommendation, or failing to
withdraw, modify or amend any previously made recommendation, would constitute
a breach of fiduciary duty by Saratoga's Board of Directors under applicable
law. In addition, nothing in this Section 5.3 or elsewhere in this Agreement
shall prohibit accurate disclosure by Saratoga of information

                                      A-35
<PAGE>

that is required to be disclosed in the Proxy Statement, or any other document
required to be filed with the SEC (including without limitation a
Solicitation/Recommendation Statement on Schedule 14D-9) or otherwise required
to be disclosed by applicable law or regulation or the rules of any securities
exchange or automated quotation system on which the securities of Saratoga may
then be traded.

   (b) SJNB shall call a meeting of its shareholders to be held as promptly as
practicable for the purpose of voting upon the adoption of this Agreement. SJNB
will, through its Board of Directors, recommend to its shareholders adoption of
this Agreement unless the Board of Directors of SJNB determines in good faith,
based upon the written advice of outside counsel, that making such
recommendation, or failing to withdraw, modify or amend any previously made
recommendation, would constitute a breach of fiduciary duty by SJNB's Board of
Directors under applicable law. In addition, nothing in this Section 5.3 or
elsewhere in this Agreement shall prohibit accurate disclosure by SJNB of
information that is required to be disclosed in the Proxy Statement, the S-4 or
any other document required to be filed with the SEC (including without
limitation a Solicitation/Recommendation Statement on Schedule 14D-9) or
otherwise required to be disclosed by applicable law or regulation or the rules
of any securities exchange or automated quotation system on which the
securities of SJNB may then be traded.

   (c) Each of Saratoga and SJNB shall use all commercially reasonable efforts
to cause such meetings of their respective shareholders to take place on or
before November 12, 1999, or as soon thereafter as is reasonably practicable.
Saratoga and SJNB shall coordinate and cooperate with respect to the timing of
said meetings and the date on which the Saratoga Shareholders' Meeting shall be
held.

   5.4 No Solicitations. (a) From the date hereof until the earlier of the
Effective Time or the termination of this Agreement, Saratoga agrees that
neither it, nor any of its Subsidiaries, Affiliates or agents shall, nor shall
it authorize or permit any of its officers, directors or employees or any
investment banker, financial advisor, attorney, accountant or other
representative or agent (collectively, "Representatives") retained by it or any
of its Subsidiaries, Affiliates or agents to, solicit, initiate or knowingly
encourage the submission of, or enter into discussions or negotiations with or
provide information to any person or group of persons (other than the
respective parties to this Agreement) concerning, any Takeover Proposal (as
defined below) or enter into any agreement with a third party relating to a
Takeover Proposal or assist, participate in, facilitate or encourage any effort
or attempt by any other person to do or seek to do any of the foregoing.
Without limiting the foregoing, it is understood that any violation of the
restrictions set forth in the preceding sentence by any director, officer or
Affiliate of Saratoga or any of its Subsidiaries or any investment banker,
attorney or other advisor or Representative of Saratoga or any of its
Subsidiaries or Affiliates, whether or not such Person is purporting to act on
behalf of Saratoga or any of its Subsidiaries or otherwise, shall be deemed to
be a breach of this Section 5.4(a) by Saratoga. As used in this Agreement,
"Takeover Proposal" shall mean any inquiry, proposal or offer to acquire in any
manner 20% or more of any class of equity securities of, or a merger,
consolidation, business combination, sale, recapitalization, liquidation,
dissolution or other disposition or similar transaction involving 20% or more
of the assets of, Saratoga or any Significant Subsidiary of Saratoga, or any
tender offer or exchange offer that if consummated would result in any person
beneficially owning 20% or more of any class of equity securities of Saratoga
or any Significant Subsidiary of Saratoga (other than pursuant to the
transactions contemplated by this Agreement and the Stock Option Agreement). A
"Significant Subsidiary" means any Subsidiary of a person that would constitute
a Significant Subsidiary of such person within the meaning of Rule 1-02 of
Regulation S-X of the Securities and Exchange Commission (the "SEC").

   (b) Except as set forth herein, neither the Board of Directors of Saratoga
nor any committee thereof shall (i) withdraw or modify, or propose to withdraw
or modify, in a manner adverse to SJNB, the approval or recommendation by the
Board of Directors of Saratoga or any such committee of this Agreement or the
Merger, (ii) approve or recommend, or propose to approve or recommend, any
Takeover Proposal, or (iii) enter into any agreement with respect to any
Takeover Proposal. Notwithstanding the foregoing, the Board of Directors of
Saratoga, to the extent required by its fiduciary obligations, as determined in
good faith by the Board of Directors of Saratoga based on the advice of
independent counsel, may (subject to the following sentences) withdraw or
modify its approval or recommendation of this Agreement or the Merger, approve
or

                                      A-36
<PAGE>

recommend any Superior Proposal (as defined herein), enter into an agreement
with respect to such Superior Proposal or terminate this Agreement, in each
case at any time after the third business day following SJNBs receipt of a
written notice advising SJNB that the Board of Directors of Saratoga has
received a Superior Proposal, specifying the material terms and conditions of
such Superior Proposal and identifying the Person making such Superior Proposal
(it being understood that any amendment to a Superior Proposal shall
necessitate an additional three business day period). In addition, if Saratoga
proposes to enter into an agreement with respect to any Takeover Proposal, it
shall concurrently with entering into such agreement pay, or cause to be paid,
to SJNB the Termination Fee in accordance with the provisions of Section
5.4(d). For purposes hereof, "Superior Proposal" shall mean any bona fide
written Takeover Proposal by a third party on terms determined in good faith by
the Board of Directors of Saratoga to be reasonably capable of being completed,
taking into account all legal, financial, regulatory and other aspects of the
proposal and the Person making the proposal and (based on the advice of a
financial advisor of nationally recognized reputation), if consummated to be
more favorable to the shareholders of Saratoga from a financial point of view
than the Merger.

   (c) In addition to the obligation of Saratoga set forth in paragraph (b)
above, Saratoga promptly shall advise SJNB orally and in writing of any request
for information or of any Takeover Proposal, or any inquiry with respect to or
which could lead to any Takeover Proposal, the material terms and conditions of
such request, Takeover Proposal or inquiry and the identity of the Person
making any such request, Takeover Proposal or inquiry. Saratoga shall keep SJNB
fully informed of the status and details (including amendments or proposed
amendments) of any such request, Takeover Proposal or inquiry.

   (d) If this Agreement is terminated pursuant to its terms other than by SJNB
or Saratoga pursuant to Section 7.1(a), 7.1(b)(i) or 7.1(b)(ii), 7.1(c),
7.1(e)(ii), 7.1(f)(i)(2) or 7.1(f)(i)(3), 7.1(g), 7.1(i)(1) or 7.1(i)(2), or
other than by Saratoga pursuant to Section 7.1(e)(i), 7.1(f)(ii)(1) or
7.1(f)(ii)(2), or 7.1(h) (in the event that SJNB elects not to adjust the
Exchange Ratio as provided in Section 7.1(h)), and an Acquisition Event (as
defined herein) shall occur after the date hereof and within 18 months after
the date of such termination, Saratoga shall pay promptly, but in no event
later than two Business Days after the occurrence of such Acquisition Event, by
wire transfer of immediately available Federal Funds to such account as SJNB
shall designate, $1.3 million (the "Termination Fee") as liquidated damages to
SJNB for such breach (but only if a Termination Fee shall not theretofore have
been paid pursuant to Section 5.4(b) hereof, and provided, further that if
Actual Expenses have been paid by Saratoga pursuant to the penultimate sentence
of Section 5.9, the Termination Fee payable shall be reduced by the amount of
such Actual Expenses paid). For purposes hereof, "Acquisition Event" shall mean
any of the following: (i) any Person (other than SJNB or any Subsidiary
thereof) shall have acquired pursuant to a tender offer or otherwise beneficial
ownership of 20% or more of the outstanding shares of Saratoga Common Stock;
(ii) Saratoga or SNB shall have authorized, recommended, proposed or publicly
announced an intention to authorize, recommend or propose, or entered into, an
agreement with any Person (other than SJNB or a Subsidiary thereof) to (A)
effect a merger, consolidation or similar transaction (or series of unrelated
and non-integrated mergers, consolidations or similar transactions) involving
Saratoga or SNB (other than a merger, consolidation or similar transaction in
which those holders of Saratoga Common Stock outstanding immediately prior to
each such transaction continue to own at least 80% of the Saratoga Common Stock
outstanding immediately after such transaction), (B) sell, lease or otherwise
dispose of assets of Saratoga or its Subsidiaries representing 20% or more of
the consolidated assets of Saratoga and its Subsidiaries, or (C) issue, sell or
otherwise dispose of (including by way of merger, consolidation, share exchange
or any similar transaction) securities representing 20% or more of the voting
power of Saratoga or its Subsidiaries (but excluding a series of unrelated and
non-integrated issues, sales or other dispositions).

   (e) Notwithstanding anything to the contrary contained herein, the aggregate
amount of gain realized by SJNB pursuant to the Stock Option Agreement, when
added to the Termination Fee, if any, received by SJNB, shall not in the
aggregate exceed $2,200,000 as liquidated damages, and, in the event SJNB
realizes gain in excess of such amount under the Stock Option Agreement when
added to the Termination Fee, if any, from Saratoga, SJNB undertakes promptly
to pay back to Saratoga, by wire transfer of immediately available funds, the
amount of such excess.


                                      A-37
<PAGE>

   5.5 Legal Conditions.

   (a) Each of Saratoga and SJNB shall, and shall cause its respective
Subsidiaries to, use all reasonable efforts (i) to take, or cause to be taken,
all actions necessary to comply promptly with all legal requirements which may
be imposed on such party or its Subsidiaries with respect to the transactions
contemplated by this Agreement and as promptly as practicable, (ii) to obtain
(and to cooperate with the other party to obtain) any consent, authorization,
order or approval of, or any exemption by, any Governmental Entity and or any
other public or private third party which is required to be obtained or made by
such party or any of its Subsidiaries in connection with the Merger and the
other transactions contemplated by this Agreement. Each of Saratoga and SJNB
will promptly cooperate with and furnish information to the other in connection
with any such burden suffered by, or requirement imposed upon, any of them or
any of their Subsidiaries in connection with the foregoing.

   (b) Each of Saratoga and SJNB agrees to use all reasonable best efforts to
take, or cause to be taken, all actions, and to do, or cause to be done, all
things necessary and proper or advisable to consummate, as soon as practicable
after the date of this Agreement, the transactions contemplated hereby,
including, without limitation, using all reasonable best efforts to (i) lift or
rescind any injunction or restraining order or other order adversely affecting
the ability of the parties to consummate the transactions contemplated hereby,
(ii) defend any Litigation seeking to enjoin, prevent or delay the consummation
of the transactions contemplated hereby or seeking material damages, (iii)
provide to counsel to the other party hereto representations and certifications
as to such matters as such counsel may reasonably request in order to render
the opinions referred to in Sections 6.2(d) and 6.3(c), and (iv) to obtain the
letters of the independent accountants referred to in Section 6.1(f).

   5.6 Employee Benefit Plans.

   (a) For purposes of all employee benefit plans of SJNB or its Subsidiaries
in which the employees of Saratoga who shall remain in the employment of SJNB
or its Subsidiaries after the Closing Date shall participate from and after
such date (including all policies and employee fringe benefit programs,
including vacation policies), and under which an employee's benefit depends, in
whole or in part, on length of service, credit will be given to employees of
Saratoga for vesting and eligibility purposes only for service previously
credited with Saratoga or its Subsidiaries prior to the Effective Time to the
extent that such crediting of service does not result in duplication of
benefits; provided, however, that SJNB shall determine each employee's length
of service in a manner consistent with the customary practice with respect to
the employees of the SJNB Subsidiary by which they shall be employed. SJNB
shall also cause each employee benefit plan in which employees of Saratoga
participate from and after the Effective Time to waive (i) any preexisting
condition restriction which was waived under the terms of any analogous Benefit
Plan immediately prior to the Effective Time or (ii) any waiting period
limitation which would otherwise be applicable to an employee of Saratoga on or
after the Effective Time to the extent such employee of Saratoga had satisfied
any similar waiting period limitation under an analogous Benefit Plan prior to
the Effective Time.

   (b) Notwithstanding the foregoing, except as otherwise expressly provided in
this Agreement, SJNB shall, and shall cause its Subsidiaries to, honor in
accordance with their terms all Benefit Plans, each as amended to the date
hereof and as otherwise amended prior to the Closing Date in accordance with
the terms of paragraph (e) hereof, and other contracts, arrangements,
commitments or understandings described in the Saratoga Disclosure Schedule;
provided, however, that this paragraph (b) shall be subject to the provisions
of paragraph (d) hereof. SJNB and Saratoga hereby acknowledge that consummation
of the Merger will constitute a "Change in Control" for purposes of all Benefit
Plans, contracts, arrangements and commitments of Saratoga identified pursuant
to Section 3.1(k) that contain change in control provisions.

   (c) Saratoga and its Subsidiaries shall take all action necessary to ensure
that no further mortgage loans will be made to employees and to amend any
retiree medical plans so that no additional retirees shall become entitled to
continuing medical insurance benefits thereunder.


                                      A-38
<PAGE>

   (d) Except as otherwise provided herein, nothing in this Section 5.6 shall
be interpreted as preventing SJNB or its Subsidiaries after the Effective Time
from amending, modifying or terminating any of the Plans, or other contracts,
arrangements, commitments or understandings, in accordance with their terms and
applicable law.

   (e) Saratoga agrees that the Saratoga Bank Savings Plan or any other 401(k)
plans may be terminated, frozen, modified or merged into the appropriate SJNB
qualified plans before or after the Effective Time, as determined by SJNB in
its sole discretion; provided, however, that Saratoga shall not be required to
take any such action prior to the Effective Time unless and until SJNB
acknowledges that all material conditions to its obligation to consummate the
Merger herein have been satisfied or waived and SJNB reasonably believes the
Merger will close.

   5.7 Indemnification; Directors' and Officers' Insurance.

   (a) From and after the Effective Time, the Surviving Corporation shall
indemnify, defend and hold harmless each person who is as of the date hereof or
who becomes prior to the Effective Time, an officer or director of Saratoga or
any of its Subsidiaries (the "Indemnified Parties") against (i) all losses,
claims, damages, costs, expenses, liabilities or judgments or amounts of any
nature whatsoever, governmental or non-governmental (including but not limited
to reasonable expenses of counsel and investigation) that are paid in
settlement of or in connection with any claim, action, suit, proceeding or
investigation based in whole or in part on or arising in whole or in part out
of the fact that such person is or was a director or officer of Saratoga or any
Subsidiary of Saratoga, whether pertaining to any matter existing or occurring
at or prior to the Effective Time and whether asserted or claimed prior to, or
at or after, the Effective Time ("Indemnified Liabilities") and (ii) all
Indemnified Liabilities based in whole or in part on, or arising in whole or in
part out of, or pertaining to this Agreement or the transactions contemplated
hereby, in each case to the full extent that Saratoga would have been permitted
under applicable law and its Articles of Incorporation, and the Surviving
Corporation is permitted under California law, to indemnify such person (and
the Surviving Corporation shall pay expenses in advance of the final
disposition of any such action or proceeding to each Indemnified Party to the
full extent permitted by law with no bond or security to be required upon
receipt of any undertaking required by section 317(f) of the CGCL). Without
limiting the foregoing, in the event any such claim, action, suit, proceeding
or investigation is brought against any Indemnified Parties (whether arising
before or after the Effective Time), (i) any counsel retained by the
Indemnified Parties for any period after the Effective Time shall be reasonably
satisfactory to the Surviving Corporation; (ii) after the Effective Time, the
Surviving Corporation shall pay all reasonable fees and expenses of such
counsel for the Indemnified Parties promptly as statements therefor are
received; and (iii) after the Effective Time, the Surviving Corporation will
use all reasonable efforts to assist in the vigorous defense of any such
matter, provided that the Surviving Corporation shall not be liable for any
settlement of any claim effected without its written consent, which consent,
however, shall not be unreasonably withheld or delayed. Any Indemnified Party
wishing to claim indemnification under this Section 5.7, upon learning of any
such claim, action, suit, proceeding or investigation, shall notify the
Surviving Corporation (but the failure so to notify the Surviving Corporation
shall not relieve it from any liability which it may have under this Section
5.7 except to the extent such failure materially prejudices the Surviving
Corporation), and shall deliver to the Surviving Corporation the undertaking,
if any, required by section 317(f) of the CGCL. The Surviving Corporation shall
be liable for the fees and expenses hereunder with respect to only one law
firm, in addition to local counsel in each applicable jurisdiction, to
represent the Indemnified Parties as a group with respect to each such matter
unless there is, under applicable standards of professional conduct, a conflict
between the positions of any two or more Indemnified Parties that would
preclude or render inadvisable joint or multiple representation of such
parties.

   (b) Upon the Effective Time, any executive officer or director of Saratoga
or SNB who becomes an officer or director of SJNB (including any Subsidiaries
thereof) shall be included in SJNB's director and officer insurance policy.
Saratoga shall cooperate with SJNB to obtain extended coverage under Saratoga's
director and officer insurance policy to cover claims made for a period of
three years after the Effective Time regarding acts or omissions of Saratoga or
SNB's directors or officers prior to the Effective Time; provided, however,
that

                                      A-39
<PAGE>

SJNB shall not be obligated to make annual premium payments for such insurance
to the extent such premiums exceed 150% of the premiums paid by Saratoga and
SNB in respect of 1998 for such insurance, as previously disclosed to SJNB
("Saratoga's Current Premium"), and if such premiums for such insurance would
at any time exceed 150% of Saratoga's Current Premium, then SJNB shall cause to
be maintained policies of insurance which, in SJNB's good faith determination,
provide the maximum coverage available at an annual premium equal to 150% of
Saratoga's Current Premium.

   (c) The provisions of this Section 5.7 are intended to be for the benefit
of, and shall be enforceable by, each Indemnified Party, his or her heirs and
his or her representatives and are in addition to, and not in substitution for,
any other rights to indemnification or contribution that any such person may
have by contract or otherwise.

   (d) Notwithstanding the foregoing, any rights or benefits conferred by
Saratoga or SNB to their respective directors or officers under indemnification
agreements in effect as of the date hereof shall, to the extent such rights or
benefits provided thereunder are in excess of or an enhancement of the
indemnification rights provided for in this Section 5.7, be honored by SJNB and
replace or supplement the indemnification rights provided in this Section 5.7
with respect to indemnification for acts or omissions by such directors or
officers occurring prior to the Closing Date.

   5.8 Additional Agreements. In case at any time after the Effective Time any
further action is necessary or desirable to carry out the purposes of this
Agreement, the proper officers and directors of each party to this Agreement
shall take all such necessary action. Subject to the mutual intent of the
parties that the Merger will be accounted for under the pooling of interests
method, Saratoga shall take any and all actions necessary or appropriate to
ensure that the Merger will be accounted for under the pooling of interests
method, including without limitation, causing Deloitte & Touche LLP to issue
the "poolability" letter required as a condition to close in Section 6.1(f).

   5.9 Fees and Expenses. Unless otherwise agreed by the parties in writing or
as otherwise provided herein, each party hereto shall bear and pay all costs
and expenses incurred by it incident to preparing, entering into and carrying
out this Agreement and to consummating the Merger, including fees and expenses
of its own financial advisors, accountants and counsel, all printing, filing,
mailing and other incidental fees, costs and expenses related thereto
associated with the S-4 and the Proxy Statement (collectively, the "SEC Fees").
Notwithstanding the foregoing provisions of this Section 5.9 and
notwithstanding the payment of any Termination Fee, if this Agreement is
terminated by either party pursuant to Section 7.1(d) or (e) hereof because of
a willful breach by the other party of any representation, warranty, covenant
or agreement as set forth in Section 7.1(d) or (e), and provided that the
terminating party shall not have been in breach (in any material respect) of
any representation and warranty, covenant or agreement contained herein, then
the breaching party shall bear and pay all the costs and expenses incurred by
the non-breaching party, with respect to the fees and expenses of financial and
other advisors, investment bankers, accountants, counsel, printers and persons
involved in the transactions contemplated by this Agreement, including SEC
Fees. Notwithstanding the foregoing provisions of this Section 5.9, if this
Agreement is terminated pursuant to Sections 7.1(f)(i)(2) or 7.1(f)(i)(3),
7.1(f)(ii)(2) or 7.1(i)(1), then Saratoga shall pay promptly by wire transfer
of immediately available funds to such account as SJNB shall designate the
amount of all costs and expenses incurred by SJNB incident to preparing,
entering into and carrying out this Agreement and to consummating the Merger,
including without limitation, fees and expenses incurred by SJNB for its
accountants and counsel and all SEC Fees, which amount shall not exceed
$500,000 (collectively, the "Actual Expenses"). Notwithstanding the foregoing
provisions of this Section 5.9, if this Agreement is terminated pursuant to
Section 7.1(i)(2) or 7.1(g)(iii), then SJNB shall pay promptly by wire transfer
of immediately available funds to such account as Saratoga shall designate the
amount of all Actual Expenses incurred by Saratoga (excluding any and all fees
and expenses of First Security Van Kasper), which amount of Actual Expenses
shall not exceed $500,000. Final settlement with respect to the payment of such
fees and expenses by the parties shall be made within thirty days of the
termination of this Agreement.


                                      A-40
<PAGE>

   Except as otherwise expressly provided herein, whether or not the
transactions contemplated hereby are consummated, all costs and expenses
incurred in connection with this Agreement and the transactions contemplated
hereby shall be paid by the party incurring such expense.

   5.10 Cooperation. During the period from the date of this Agreement to the
Effective Time, each of Saratoga and SJNB shall, (i) confer on a regular and
frequent basis with the other, report on operational matters, policies and
banking practices and promptly advise the other orally and in writing of any
change or event having, or which, insofar as can reasonably be foreseen, could
have, a material adverse effect on Saratoga or SJNB, as the case may be, or
which would cause or constitute a material breach of any of the
representations, warranties or covenants of such party contained herein, (ii)
cause each Subsidiary of Saratoga and SJNB that is a bank to file all call
reports with the appropriate Bank Regulators and all other reports,
applications and other documents required to be filed with the applicable
Governmental Entities between the date hereof and the Effective Time and (iii)
coordinate with the other the declaration of any dividends in respect of SJNB
Common Stock and Saratoga Common Stock and the record dates and payment dates
relating thereto, it being the intention of the parties hereto that holders of
SJNB Common Stock or Saratoga Common Stock shall not receive two dividends, or
fail to receive one dividend, for any single calendar quarter with respect to
their shares of SJNB Common Stock and/or Saratoga Common Stock and any shares
of SJNB Common Stock any such holder receives in exchange therefor in the
Merger.

   5.11 Affiliates. Each of SJNB and Saratoga shall use its commercially
reasonable efforts to cause each director, executive officer and other person
who is an "affiliate" (for purposes of Rule 145 under the Securities Act, in
the case of affiliates of Saratoga, and for purposes of qualifying the Merger
for pooling of interests accounting treatment, in the case of affiliates of
either SJNB or Saratoga) of such party to execute and deliver, as soon as
practicable after the date of this Agreement, and in any event on or prior to
the date the Proxy Statements are mailed to the shareholders of Saratoga and
SJNB, a written agreement, substantially in the form attached hereto as Exhibit
C-1 with respect to Saratoga and Exhibit C-2 with respect to SJNB. Saratoga
shall instruct Saratoga's transfer agent regarding stop transfer instructions
required in connection with shares of Saratoga Common Stock owned by
"affiliates" of Saratoga, as described in Exhibit C-1 hereto.

   5.12 Stock Exchange Listing. SJNB shall use its commercially reasonable
efforts to cause the shares of SJNB Common Stock to be issued in the Merger to
be approved for listing on the NASDAQ National Market, subject to official
notice of issuance, prior to the Effective Time.

   5.13 Advice of Changes. SJNB and Saratoga shall promptly advise the other
party of any change or event which, individually or in the aggregate with other
such changes or events, has a material adverse effect on it or which it
believes would or would be reasonably likely to cause or constitute a material
breach of any of its representations, warranties or covenants contained herein.

   5.14 Subsequent Interim and Annual Financial Statements; Certain Reports. As
soon as reasonably available, but in no event more than 45 days after the end
of each fiscal quarter (other than the fourth quarter of a fiscal year) or 90
days after December 31, 1999, or the end of each fiscal year ending after the
date of this Agreement, each party will deliver to the other party its
Quarterly Report on Form 10-Q or its Annual Report on Form 10-K, as the case
may be, as filed with the SEC under the Exchange Act, and each party will
furnish to the other party copies of their management's monthly interim reports
(which do not comply with the published rules and regulations of the SEC or
GAAP) to their respective Boards of Directors within two days after such
reports are so furnished to the Boards.

   5.15 Dissenters' Rights. Saratoga and SJNB shall include in the notice of
their respective shareholders' meetings the summary of certain provisions of
the CGCL as required by CGCL section 1300(b).

   5.16 SNB Board of Directors and Executive Officers. In the event that the
Bank Merger will not be consummated immediately following the Effective Time,
at and after the Effective Time, the Board of Directors and executive officers
of SNB shall consist of such individuals as the Board of Directors of SJNB
shall

                                      A-41
<PAGE>

designate in their sole discretion. In such event, the condition set forth in
Section 6.2(g) shall be deemed to be replaced by the following clause: "At the
request of SJNB, which request shall be provided in writing at least five
Business Days prior to the Closing Date, the members of the Board of Directors
of SNB shall submit their resignations effective as of the Effective Time."

   5.17 Transition Services. SJNB shall retain Richard L. Mount as a consultant
to SJNB for a period of six (6) months from and after the Effective Time to
provide transition services in the nature of customer retention, business
development, consulation and advice. SJNB shall pay to Mr. Mount, on the first
and fifteenth of each calendar month in such six-month period, compensation
totaling the amount of $14,000 per month (prorated for any partial month).

                                   ARTICLE VI

                              CONDITIONS PRECEDENT

   6.1 Conditions to Each Party's Obligation. The respective obligations of
each party to consummate the transactions contemplated by this Agreement shall
be subject to the satisfaction on or prior to the Closing Date of the following
conditions:

   (a) Shareholder Approvals. The Saratoga Shareholder Approval and the SJNB
Shareholder Approval shall have been obtained.

   (b) Other Approvals. All authorizations, consents, orders or approvals of,
or declarations or filings with, and all expirations of waiting periods imposed
by, any Governmental Entity (all the foregoing, "Consents") which are necessary
pursuant to the Merger, other than immaterial Consents which, if not obtained,
would have no material adverse effect on the consummation of the transactions
contemplated by this Agreement and the Agreement of Merger or on either SJNB or
the Surviving Corporation, shall have been filed, have occurred or been
obtained (all such permits, approvals, filings and consents and the lapse of
all such waiting periods being referred to as the "Requisite Regulatory
Approvals") and all such Requisite Regulatory Approvals shall be in full force
and effect.

   (c) No Injunctions or Restraints. No temporary restraining order,
preliminary or permanent injunction or other order issued by any court of
competent jurisdiction or other legal restraint or prohibition (an
"Injunction") preventing the consummation of the transactions contemplated by
this Agreement or the Transaction Agreements shall be in effect. There shall
not be any action taken, or any statute, rule, regulation or order enacted,
entered, enforced or deemed applicable to the transactions contemplated by this
Agreement or the Transaction Agreements, by any Federal, state or foreign
Governmental Entity of competent jurisdiction which makes the consummation of
the transactions contemplated by this Agreement or the Transaction Agreements
illegal.

   (d) NASDAQ National Market Listing. The shares of SJNB Common Stock which
shall be issued to the shareholders of Saratoga upon consummation of the Merger
shall have been approved for listing upon official notice of issuance on the
NASDAQ National Market.

   (e) S-4. The S-4 shall become effective under the Securities Act, no stop
orders suspending the effectiveness of the S-4 shall have been issued and no
proceedings for that purpose shall have been initiated or threatened by the
SEC.

   (f) Pooling. SJNB shall have received a letter from KPMG LLP, independent
public accountants to SJNB, dated the Closing Date, in form and substance
reasonably satisfactory to SJNB and Saratoga, respectively, to the effect that
the Merger will qualify for "pooling of interests" accounting treatment;
provided, however, that Deloitte & Touche LLP shall deliver to the Saratoga
Board of Directors and KPMG LLP a "poolability letter" dated the Closing Date
in a form reasonably acceptable to KPMG LLP and in accordance with Statement on
Auditing Standards No. 50; provided further, however, that if either party
shall have

                                      A-42
<PAGE>

knowingly taken or omitted to take any action within the control of such party
which shall have prevented such party's independent public accountants from
rendering such letter, then this condition shall not be applicable to such
party.

   (g) Burdensome Condition. There shall not be any action taken, or any
statute, rule, regulation, order or decree enacted, entered, enforced or deemed
applicable to the Merger or the other Transaction Agreements by any Federal,
state or foreign Governmental Entity which, in connection with the grant of a
Requisite Regulatory Approval or otherwise, imposes any condition or
restriction (a "Burdensome Condition") upon SJNB or Saratoga or their
respective Subsidiaries or Affiliates which would reasonably be expected to (i)
have a material adverse effect after the Effective Time on the present or
prospective consolidated financial condition, business, operating results or
prospects of SJNB or the Surviving Corporation (including, without limitation,
any requirement to dispose of any material assets or businesses or restrict in
any significant way any material operations or activities), (ii) prevent SJNB
or Saratoga or their respective Subsidiaries from realizing all or a
substantial portion of the economic benefits of the transactions contemplated
by this Agreement, or (iii) materially impair SJNB's or Saratoga's ability to
exercise and enforce its rights under the Transaction Agreements.

   (h) Dissenters' Rights. The aggregate number of shares of SJNB Common Stock
and Saratoga Common Stock held by persons who have taken all of the steps
required at or prior to the SJNB Shareholders' Meeting and the Saratoga
Shareholders' Meeting to perfect their right (if any) to be paid the value of
such shares under Chapter 13 of the CGCL shall not exceed 9% of the outstanding
shares of SJNB Common Stock and Saratoga Common Stock.

   6.2 Conditions to Obligations of SJNB. The obligation of SJNB to consummate
the transactions contemplated by this Agreement is subject to the satisfaction
of the following conditions unless waived by SJNB:

   (a) Representations and Warranties. The representations and warranties of
Saratoga and SNB set forth in this Agreement shall be true and correct in all
material respects as of the date of this Agreement and (except to the extent
such representations and warranties speak as of an earlier date) as of the
Closing Date as though made on and as of the Closing Date, and SJNB shall have
received a certificate signed on behalf of each of Saratoga and SNB by their
respective President and Chief Executive Officer and Chief Financial Officer to
such effect.

   (b) Performance of Obligations. Saratoga and SNB shall have performed in all
material respects all obligations required to be performed by it under this
Agreement at or prior to the Closing Date, and SJNB shall have received a
certificate signed on behalf of each of Saratoga and SNB by their respective
President and Chief Executive Officer and Chief Financial Officer to such
effect.

   (c) Corporate Action. SJNB shall have received a copy of the resolution or
resolutions duly adopted by the Board of Directors (or a duly authorized
committee thereof) of Saratoga and of the holders of the Saratoga Common Stock
authorizing the execution, delivery and performance by Saratoga of this
Agreement and the other Transaction Agreements, certified by the Secretary or
an Assistant Secretary of Saratoga.

   (d) Tax Opinion. SJNB shall have received the opinion of Pillsbury Madison &
Sutro LLP, counsel to SJNB, dated the Closing Date, to the effect that (i) the
Merger will be treated for Federal income tax purposes as a reorganization
within the meaning of section 368(a) of the Code and (ii) SJNB and Saratoga
will each be a party to that reorganization within the meaning of section
368(b) of the Code. In rendering such opinion, such counsel may require and
rely upon representations and covenants contained in certificates of officers
of SJNB, Saratoga, SNB and others. If the opinion referred to in this Section
6.2(d) is not delivered, such condition shall be deemed to be satisfied if SJNB
shall have received an opinion to the effect of subsections (i) and (ii) above
from Deloitte & Touche LLP or another accounting firm or law firm selected by
Saratoga and reasonably acceptable to SJNB. SJNB will cooperate in obtaining
such opinion.

                                      A-43
<PAGE>

   (e) Material Adverse Effect. Except as disclosed to SJNB in writing prior to
the date hereof, no material adverse effect upon Saratoga shall have occurred
since December 31, 1998, and Saratoga shall not be a party to or so far as
Saratoga is aware, threatened with, and to Saratoga's knowledge there is no
reasonable basis for, any legal action or other proceeding before any court,
any arbitrator of any kind or any government agency, which in the reasonable
judgment of SJNB, could have a material adverse effect upon Saratoga, and SJNB
shall have received a certificate signed on behalf of Saratoga by its President
and Chief Executive Officer and its Chief Financial Officer to such effect.

   (f) Closing Documents. SJNB shall have received from Saratoga such
certificates and other closing documents as counsel for SJNB shall reasonably
request.

   (g) Bank Merger. Any required Consents of any Governmental Entities to the
consummation of the Bank Merger shall have been received and the Bank Merger
shall be able to be consummated immediately following the Effective Time.

   (h) Comfort Letter (S-4). SJNB shall have received from Deloitte & Touche
LLP a letter addressed to SJNB not more than two (2) Business Days prior to the
effective date of the S-4 with respect to certain financial information
regarding Saratoga, in form and substance which is customary in transactions of
the nature contemplated by this Agreement.

   (i) Comfort Letter. SJNB shall have received from Deloitte & Touche LLP a
comfort letter in form and substance customary for transactions of this type
and reasonably acceptable to SJNB with respect to Saratoga's financial
statements for the period ending no more than five (5) Business Days prior to
the Closing Date.

   6.3 Conditions to Obligations of Saratoga. The obligation of Saratoga to
consummate the transactions contemplated by this Agreement is subject to the
satisfaction of the following conditions unless waived by Saratoga:

   (a) Representations and Warranties. The representations and warranties of
SJNB set forth in this Agreement shall be true and correct in all material
respects as of the date of this Agreement and (except to the extent such
representations and warranties speak as of an earlier date) as of the Closing
Date as though made on and as of the Closing Date, and Saratoga shall have
received a certificate signed on behalf of SJNB by its President and Chief
Executive Officer and its Chief Financial Officer to such effect.

   (b) Performance of Obligations. SJNB shall have performed in all material
respects all obligations required to be performed by it under this Agreement at
or prior to the Closing Date, and Saratoga shall have received a certificate
signed on behalf of SJNB by its President and Chief Executive Officer and its
Chief Financial Officer to such effect.

   (c) Corporate Action. Saratoga shall have received a copy of the resolution
or resolutions duly adopted by the Board of Directors (or a duly authorized
committee thereof) of SJNB and of the holders of the SJNB Common Stock
authorizing the execution, delivery and performance by SJNB of this Agreement
and the other Transaction Agreements, certified by the Secretary or an
Assistant Secretary of SJNB.

   (d) Tax Opinion. Saratoga shall have received the opinion of Deloitte &
Touche LLP, independent accountants to Saratoga (or other accounting or law
firm reasonably acceptable to SJNB), dated the Closing Date, to the effect that
(i) the Merger should be treated for Federal income tax purposes as a
reorganization within the meaning of section 368(a) of the Code, (ii) SJNB and
Saratoga should each be a party to that reorganization within the meaning of
section 368(b) of the Code and (iii) (1) except for any cash received in lieu
of any fractional share, no gain or loss should be recognized by holders of
Saratoga Common Stock who receive SJNB Common Stock in exchange for the
Saratoga Common Stock which they hold; (2) the holding period of SJNB Common
Stock exchanged for Saratoga Common Stock should include the holding period of

                                      A-44
<PAGE>

the Saratoga Common Stock for which it is exchanged, assuming the shares of
Saratoga Common Stock are capital assets in the hands of the holder thereof at
the Effective Time; and (3) the basis of the SJNB Common Stock received in the
exchange should be the same as the basis of the Saratoga Common Stock for which
it was exchanged, less any basis attributable to fractional shares for which
cash is received. In rendering such opinion, such independent accountants ( or
law firm) may require and rely upon representations and covenants contained in
certificates of officers of SJNB, Saratoga, SNB and others. If the opinion
referred to in this Section 6.3(d) is not delivered, such condition shall be
deemed satisfied if Saratoga shall have received an opinion to the effect of
subsections (i) and (ii) above from Pillsbury Madison & Sutro LLP or another
law or accounting firm selected by SJNB and reasonably acceptable to Saratoga.
Saratoga will cooperate in obtaining such opinion.

   (e) Material Adverse Effect. Except as disclosed to Saratoga in writing
prior to the date hereof, no material adverse effect upon SJNB shall have
occurred since December 31, 1998, and SJNB shall not be a party to or so far as
SJNB is aware, threatened with, and to SJNB's knowledge there is no reasonable
basis for, any legal action or other proceeding before any court, any
arbitrator of any kind or any governmental agency, which in the reasonable
judgment of Saratoga, could have a material adverse effect upon SJNB, and
Saratoga shall have received a certificate signed on behalf of SJNB by its
President and Chief Executive Officer and its Chief Financial Officer to such
effect.

   (f) Closing Documents. Saratoga shall have received from SJNB such
certificates and other closing documents as counsel for Saratoga shall
reasonably request.

   (g) Additions to SJNB Board of Directors. SJNB shall have amended its Bylaws
or taken any other action necessary to increase the number of authorized
directors on its Board of Directors to permit the appointment of the five
Saratoga Designees (pursuant to Section 1.3(a)(iv)) at least five Business Days
prior to the Closing Date.

   (h) Fairness Opinion. Saratoga shall have received a written "bring-down"
opinion of First Security Van Kasper, dated as of the date of Saratoga's Proxy
Statement, to the effect that, as of such date, the consideration to be
received by the holders of the Saratoga Common Stock in the Merger is fair to
the holders of the Saratoga Common Stock from a financial point of view.

   (i) Comfort Letter (S-4). Saratoga shall have received from KPMG LLP a
letter addressed to Saratoga not more than two (2) Business Days prior to the
effective date of the S-4 with respect to certain financial information
regarding SJNB, in form and substance which is customary in transactions of the
nature contemplated by this Agreement.

   (j) Comfort Letter. Saratoga shall have received from KPMG LLP a comfort
letter in form and substance customary for transactions of this type and
reasonably acceptable to Saratoga with respect to SJNB's financial statements
for the period ending no more than five (5) Business Days prior to the Closing
Date.

                                  ARTICLE VII

                           TERMINATION AND AMENDMENT

   7.1 Termination. This Agreement may be terminated at any time prior to the
Effective Time, by action taken or authorized by the Board of Directors of the
terminating party or parties, whether before or after adoption of the Agreement
by the shareholders of Saratoga or SJNB:

    (a) by mutual consent of SJNB and Saratoga in a written instrument;

    (b) by either SJNB or Saratoga (i) upon written notice to the other party
if any Bank Regulator shall have issued an order denying approval of the Merger
and the other material aspects of the transactions contemplated

                                      A-45
<PAGE>

by this Agreement or if any Governmental Entity of competent jurisdiction shall
have issued a final permanent order enjoining or otherwise prohibiting the
consummation of the transactions contemplated by this Agreement or (ii) if any
Governmental Entity of competent jurisdiction shall have issued an order in
connection with the transactions contemplated hereby imposing a Burdensome
Condition on SJNB or the Surviving Corporation, and in any such case the time
for appeal or petition for reconsideration of any such order referred to in
clauses (i) or (ii) shall have expired without such appeal or petition being
granted;

    (c) by either SJNB or Saratoga if the Merger shall not have been
consummated on or before March 31, 2000; provided that if the Merger shall not
have been consummated on or before such date, such termination date may be
extended by up to 60 days thereafter (i) at the election of the non-breaching
party, if the Merger shall not have been consummated due to the volitional
breach of any material representation, warranty or covenant in this Agreement
by SJNB or Saratoga, or (ii) at the election of the party who has requested any
Requisite Regulatory Approval, in the event that the Merger shall not have been
consummated due to the fact that any such Requisite Regulatory Approvals shall
not yet have been received;

    (d) by SJNB in the event of a breach by Saratoga or SNB of any
representation, warranty or covenant contained in this Agreement, which breach
(i) either is not cured within 45 days after the giving of written notice to
Saratoga or SNB, or is of a nature which cannot be cured prior to the Closing
and (ii) would entitle the non-breaching party to elect not to consummate the
transactions contemplated hereby pursuant to Article VI; provided, however,
that SJNB may immediately terminate this Agreement upon notice to Saratoga in
the event that Saratoga or SNB shall breach the covenant provided for in
Section 5.4 hereof;

    (e) (i) by Saratoga in the event of a breach by SJNB of any representation,
warranty or covenant contained in this Agreement, which breach (1) either is
not cured within 45 days after the giving of written notice to SJNB or is of a
nature which cannot be cured prior to the Closing and (2) would entitle the
non-breaching party to elect not to consummate the transactions contemplated
hereby pursuant to Article VI; provided, however, that Saratoga may terminate
this Agreement within ten Business Days after notice to SJNB in the event that
SJNB shall breach the covenant provided for in Section 4.2(c) hereof and such
breach shall not have been cured within such ten Business Day period and, upon
such termination, SJNB shall pay to Saratoga the Termination Fee as liquidated
damages to Saratoga for such breach, which sum shall be paid by wire transfer
of immediately available Federal Funds, to such account as Saratoga shall
designate;

     (ii) by SJNB, in the event that, notwithstanding its obligations in
Section 4.2(c), a third party makes a written offer regarding a Takeover
Proposal of SJNB in which such third party indicates that they would not be
willing to consummate such a Takeover Proposal unless this Agreement is
terminated, and the Board of Directors of SJNB determines in good faith, based
upon the written advice of outside counsel, that failing to accept such
Takeover Proposal would constitute a breach of fiduciary duty by SJNB's Board
of Directors under applicable law; provided, however, that upon such
termination, SJNB shall pay to Saratoga the Termination Fee as liquidated
damages to Saratoga for such termination, which sum shall be paid in the manner
described in subsection 7.1(e)(i) above;

    (f) (i) by SJNB (1) if, in accordance with Section 5.3, the Board of
Directors of Saratoga fails to recommend adoption of this Agreement by the
shareholders of Saratoga, or amends or modifies such recommendation in a manner
materially adverse to SJNB or withdraws such recommendation to the shareholders
of Saratoga, (2) if the condition set forth in Section 6.3(h) is not satisfied,
or (3) if Deloitte & Touche LLP fails to deliver the "poolability letter"
required by Section 6.1(f);

     (ii) by Saratoga (1) if, in accordance with Section 5.3, the Board of
Directors of SJNB fails to recommend adoption of this Agreement by the
shareholders of SJNB, or amends or modifies such recommendation in a manner
materially adverse to Saratoga or withdraws such recommendation to the
shareholders of SJNB, or (2) if the condition set forth in Section 6.3(h) is
not satisfied;

    (g) by SJNB or Saratoga, if (i) the Saratoga Shareholder Approval or the
SJNB Shareholder Approval shall not have been obtained at a duly held meeting
of shareholders of Saratoga or SJNB, as appropriate, held for such purpose or
at any adjournment, postponement or continuation thereof, or (ii) the condition
set forth in

                                      A-46
<PAGE>

Section 6.1(h) is not satisfied, or (iii) KPMG LLP fails to deliver the letter
required by Section 6.1(f) (although Deloitte & Touche LLP has delivered the
"poolability letter" required by Section 6.1(f));

    (h) by the Board of Directors of Saratoga, if the Board of Directors so
determines by a vote of a majority of the members of its entire Board, at any
time during the two-Business Day period commencing on the first Business Day
after the Determination Date (as defined herein), if the Average SJNB Closing
Price shall be less than $29.3590 (the "Minimum Price"); subject, however, to
the following provisions of this paragraph (h). If Saratoga elects to exercise
its termination right pursuant to the immediately preceding sentence, it shall
give prompt written notice to SJNB during such two-Business Day period by means
of facsimile transmission (as provided in Section 8.2 hereof); provided that
such notice of election to terminate may be withdrawn at any time within the
aforementioned two-Business Day period. During the five Business-Day period
commencing on the day after receipt of such notice of election to terminate,
SJNB shall have the option of adjusting the Exchange Ratio to equal a number
equal to a quotient (rounded to the nearest one ten-thousandth), the numerator
of which is the product of the Minimum Price and 0.70 and the denominator of
which is the Average SJNB Closing Price. If SJNB makes the election
contemplated by the preceding sentence, within such five Business-Day period,
it shall give prompt written notice to Saratoga of such election and the
revised Exchange Ratio, whereupon no termination shall have occurred pursuant
to this paragraph (h) and this Agreement shall remain in effect in accordance
with its terms (except as the Exchange Ratio shall have been so modified), and
any references in this Agreement to "Exchange Ratio" shall thereafter be deemed
to refer to the Exchange Ratio as adjusted pursuant to this paragraph (h).

   For purposes hereof, the following terms have the following meanings:

      (i) "Average SJNB Closing Price" shall mean the average of the closing
  prices of SJNB Common Stock on the NASDAQ National Market for the 20
  consecutive trading days ending on the Determination Date, rounded to four
  decimal places, whether or not trades occurred on those days (subject to
  adjustment as provided below and provided that if no trades of SJNB Common
  Stock shall occur on a given trading day the closing price thereof on the
  next preceding day when a trade shall have occurred shall be deemed to be
  the closing price on such day for the purposes hereof). In the event SJNB
  pays, declares or otherwise effects a stock split, reverse stock split,
  reclassification or stock dividend or stock distribution with respect to
  the SJNB Common Stock between the date of this Agreement and the Effective
  Time, appropriate adjustments will be made to the Average SJNB Closing
  Price of SJNB Common Stock.

       (ii) "Determination Date" shall mean the last day of the 20 trading-
  day period referred to in the definition of "Average SJNB Closing Price"
  ending five Business Days prior to the Closing Date.

     (iii) "Trading day" shall mean a day on which trading generally takes
  place on the National Association of Securities Dealers Automated
  Quotations ("NASDAQ") and on which trading in SJNB Common Stock has not
  been halted or suspended; or

   (i) (1) by SJNB in the event there has been a change, or any event involving
a prospective change, in the business, financial condition, results of
operations or prospects of Saratoga or any of its Subsidiaries which has had,
or would be reasonably likely to have, a material adverse effect on Saratoga;
provided, however, that termination pursuant to this subsection (1) shall be
effective 45 days after the giving of written notice to Saratoga if the change
or event described in said notice has not been cured; and provided, further
that termination under this subsection (1) shall be effective immediately after
the giving of written notice if said change or event cannot be cured prior to
the Closing; and (2) by Saratoga in the event there has been a change, or any
event involving a prospective change, in the business, financial condition,
results of operations or prospects of SJNB or any of its Subsidiaries which has
had, or would be reasonably likely to have, a material adverse effect on SJNB;
provided, however, that termination pursuant to this subsection (2) shall be
effective 45 days after the giving of written notice to SJNB if the change or
event described in said notice has not been cured; and provided, further that
termination under this subsection (2) shall be effective immediately after the
giving of written notice if said change or event cannot be cured prior to
Closing.

                                      A-47
<PAGE>

   7.2 Effect of Termination. Termination of this Agreement shall not terminate
or affect the Stock Option Agreement or the representations and warranties in
Article III insofar as they relate to the Stock Option Agreement or the
obligations of the parties under Section 4.2(c), 5.4, 5.9 or 8.10 or otherwise
to pay expenses as provided elsewhere herein, to maintain the confidentiality
of the other partys information pursuant to Section 5.2 or the provisions of
this Section 7.2 or of Section 8.2 or 8.6, and shall not affect any agreement
after such termination. The parties agree that any termination of this
Agreement shall not in any manner release or be construed as so releasing the
nonterminating party or parties or their respective officers or directors from
any liability or damage to the other party or parties arising out of, in
connection with or otherwise relating to, directly or indirectly, such parties
willful breach of its covenants, agreements, representations or warranties
hereunder, except to the extent expressly provided herein.

   7.3 Amendment. This Agreement may be amended by the parties hereto at any
time before or after approval of this Agreement by the shareholders of Saratoga
and SJNB, but after any such approval, no amendment shall be made which by law
requires further approval by such shareholders without such further approval.
This Agreement may not be amended except by an instrument in writing signed on
behalf of each of the parties hereto.

   7.4 Extension; Waiver. At any time prior to the Closing Date, the parties
hereto, by action taken or authorized by their respective Board of Directors,
may, to the extent legally allowed, (i) extend the time for the performance of
any of the obligations or other acts of the other parties hereto, (ii) waive
any inaccuracies in the representations and warranties contained herein or in
any document delivered pursuant hereto and (iii) waive compliance with any of
the agreements or conditions contained herein. Any agreement on the part of a
party hereto to any such extension or waiver shall be valid only if set forth
in a written instrument signed on behalf of such party.

                                  ARTICLE VIII

                               GENERAL PROVISIONS

   8.1 Survival of Representations, Warranties and Covenants. No investigation
by SJNB or Saratoga made before or after the date hereof shall affect the
representations and warranties which are contained in this Agreement; provided
that all representations, warranties, covenants and agreements in this
Agreement or in any instrument delivered pursuant hereto or thereto shall
expire on, and be terminated and extinguished at, the Effective Time other than
covenants and agreements that by their terms are to survive or be performed, in
whole or in part, after the Effective Time; provided that no such
representations, warranties or covenants shall be deemed to be terminated or
extinguished so as to deprive SJNB or Saratoga (or any director or officer
thereof) of any defense in law or equity which otherwise would be available
against the claims of any person, including, without limitation, any
shareholder or former shareholder of either SJNB or Saratoga, the aforesaid
representations, warranties, covenants and agreements being material
inducements to the consummation by SJNB and Saratoga of the transactions
contemplated herein.

   8.2 Notices. All notices and other communications hereunder shall be in
writing and shall be deemed duly given (a) on the date of delivery if delivered
personally, or by telecopy or telefacsimile, upon confirmation of receipt, (b)
on the first Business Day following the date of dispatch if delivered by a
recognized next-day courier service, or (c) on the third Business Day following
the date of mailing if delivered by registered or certified mail, return
receipt requested, postage prepaid. All notices hereunder shall be delivered as
set forth below, or pursuant to such other instructions as may be designated in
writing by the party to receive such notice.


                                      A-48
<PAGE>

     (a) if to Saratoga or SNB, to:

       Saratoga National Bank
       12000 Saratoga Sunnyvale Road
       Saratoga, California 95070
       Attention: Mr. Richard L. Mount
       President and Chief Executive Officer
       Fax: (408) 257-3705

       with a copy to:

       Coudert Brothers
       Attorneys at Law
       303 Almaden Boulevard, Fifth Floor
       San Jose, California 95110-2721
       Attention: Glenn T. Dodd, Esq.
       Fax: (408) 297-3191

       and

     (b) if to SJNB, to:

       SJNB Financial Corp.
       One North Market Street
       San Jose, California 95113
       Attention: Mr. James R. Kenny
       President and Chief Executive Officer
       Fax: (408) 947-0362

       with a copy to:

       Pillsbury Madison & Sutro LLP
       235 Montgomery Street
       San Francisco, California 94104
       Attention: Jonathan D. Joseph, Esq.
       Fax: (415) 983-1200

   8.3 Interpretation. When a reference is made in this Agreement to Sections,
Exhibits or Schedules, such reference shall be to a Section of or Exhibit or
Schedule to this Agreement unless otherwise indicated. The table of contents
and headings contained in this Agreement are for reference purposes only and
shall not affect in any way the meaning or interpretation of this Agreement.
Whenever the words "include", "includes" or "including" are used in this
Agreement, they shall be deemed to be followed by the words "without
limitation." The phrase "made available" in this Agreement shall mean that the
information referred to has been made available if requested by the party to
whom such information is to be made available.

   8.4 Counterparts. This Agreement may be executed in two or more
counterparts, all of which shall be considered one and the same agreement and
shall become effective when two or more counterparts have been signed by each
of the parties and delivered to the other parties, it being understood that all
parties need not sign the same counterpart.

   8.5 Entire Agreement; No Third Party Beneficiaries; Rights of
Ownership. This Agreement (including the documents and the instruments referred
to herein) (a) constitutes the entire agreement and supersedes all prior
agreements and understandings, both written and oral, among the parties with
respect to the subject matter hereof, other than the Confidentiality Agreement,
which shall survive the execution and delivery of this

                                      A-49
<PAGE>

Agreement, and (b) is not intended to confer upon any person other than the
parties hereto any rights or remedies hereunder except as otherwise expressly
provided in Section 5.7. The parties hereby acknowledge that, except as
hereinafter agreed to in writing, no party shall have the right to acquire or
shall be deemed to have acquired shares of common stock of the other party
pursuant to the Merger until consummation thereof. No current or former
employee of Saratoga, SJNB, or any of their respective Subsidiaries, shall be
construed as a third party beneficiary under this Agreement, and no provision
in this Agreement shall create any right in any such employee (or his or her
beneficiary or dependent) for any reason, including, without limitation, in
respect of employment, continued employment, or resumed employment with the
Surviving Corporation, Saratoga or SJNB (or any of their respective Affiliates)
or in respect of any benefits that may be provided, directly or indirectly,
under any Benefit Plan maintained by the Surviving Corporation, Saratoga or
SJNB (or any of their respective Affiliates).

   8.6 Governing Law; Consent to Jurisdiction. This Agreement shall be governed
by and construed in accordance with the laws of the State of California without
giving effect to the principles of conflicts of law. Each of the parties hereto
hereby irrevocably and unconditionally consents to submit to the non-exclusive
jurisdiction of the courts of the State of California and of the United States
of America, in each case located in the County of Santa Clara, for any
Litigation in any court or before any governmental authority arising out of or
relating to this Agreement and the transactions contemplated hereby. Each of
the parties hereto hereby irrevocably and unconditionally waives, and agrees
not to assert, by way of motion, as a defense, counterclaim or otherwise, in
any such Litigation, any claim that it is not personally subject to the
jurisdiction of the aforesaid courts for any reason other than the failure to
serve process in accordance with this Section 8.6, that it or its property is
exempt or immune from jurisdiction of any such court or from any legal process
commenced in such courts (whether through service of notice, attachment prior
to judgment, attachment in aid of execution of judgment, execution of judgment
or otherwise), and to the fullest extent permitted by applicable law, that the
Litigation in any such court is brought in an inconvenient forum, that the
venue of such Litigation is improper, or that this Agreement, or the subject
matter hereof, may not be enforced in or by such courts and further irrevocably
waives, to the fullest extent permitted by applicable law, the benefit of any
defense that would hinder, fetter or delay the levy, execution or collection of
any amount to which the party is entitled pursuant to the final judgment of any
court having jurisdiction. Each of the parties irrevocably and unconditionally
waives, to the fullest extent permitted by applicable law, any and all rights
to trial by jury in connection with any Litigation arising out of or relating
to this Agreement or the transactions contemplated hereby.

   8.7 Severability. Any term or provision of this Agreement which is invalid
or unenforceable in any jurisdiction shall, as to that jurisdiction, be
ineffective to the extent of such invalidity or unenforceability and, unless
the effect of such invalidity or unenforceability would prevent the parties
from realizing the major portion of the economic benefits of the Merger that
they currently anticipate obtaining therefrom, shall not render invalid or
unenforceable the remaining terms and provisions of this Agreement or affect
the validity or enforceability of any of the terms or provisions of this
Agreement in any other jurisdiction. If any provision of this Agreement is so
broad as to be unenforceable, the provision shall be interpreted to be only so
broad as is enforceable.

   8.8 Assignment.  Neither this Agreement nor any of the rights, interests or
obligations hereunder shall be assigned by any of the parties hereto (whether
by operation of law or otherwise) without the prior written consent of the
other parties, and any attempt to make any such assignment without such consent
shall be null and void. Subject to the preceding sentence, this Agreement will
be binding upon, inure to the benefit of and be enforceable by the parties and
their respective successors and permitted assigns.

   8.9 Publicity. SJNB, SNB, and Saratoga shall consult with each other before
issuing any press release with respect to the Merger or this Agreement and
shall not issue any such press release or make any such public statement
without the prior consent of the other parties, which shall not be unreasonably
withheld; provided, however, that a party may, without the prior consent of the
other parties (but after prior consultation, to the extent practicable in the
circumstances) issue such press release or make such public statement as may
upon the advice of outside counsel be required by law or the rules and
regulations of the National Association

                                      A-50
<PAGE>

of Securities Dealers. Without limiting the reach of the preceding sentence,
SJNB and Saratoga shall cooperate to develop all public announcement materials
and make appropriate management available at presentations related to the
transactions contemplated by this Agreement as reasonably requested by the
other party. In addition, Saratoga and its Subsidiaries shall (a) consult with
SJNB regarding communications with customers, shareholders, prospective
investors and employees related to the transactions contemplated hereby, (b)
provide SJNB with shareholders lists of Saratoga and (c) allow and facilitate
SJNB contact with shareholders of Saratoga and other prospective investors.

   8.10 Attorneys' Fees. In the event of any dispute between the parties
arising out of or relating to this Agreement, the prevailing party in any
litigation (whether at law or in equity), arbitration or other proceeding with
respect to such dispute, including any appeal thereof (collectively, an
"Action"), shall be entitled to recover such partys reasonable attorneys fees
and all other reasonable costs and expenses incurred in connection with such
Action from the non-prevailing party.

   IN WITNESS WHEREOF, SJNB, Saratoga and SNB have caused this Agreement to be
executed by their respective officers thereunto duly authorized, all as of date
first above written.

                                          SJNB FINANCIAL CORP.

                                                    /s/ James R. Kenny
                                          By:__________________________________
                                            Name: James R. Kenny
                                            Title: President and Chief
                                            Executive Officer

                                                   /s/ Jennifer Dowling
                                          By:__________________________________
                                            Name: Jennifer Dowling
                                            Title: Assistant Corporate
                                            Secretary

                                          SARATOGA BANCORP

                                                   /s/ Richard L. Mount
                                          By:__________________________________
                                            Name: Richard L. Mount
                                            Title: President and Chief
                                            Executive Officer

                                                   /s/ V. Ronald Mancuso
                                          By:__________________________________
                                            Name: V. Ronald Mancuso
                                            Title: Secretary

                                          SARATOGA NATIONAL BANK

                                                   /s/ Richard L. Mount
                                          By:__________________________________
                                            Name: Richard L. Mount
                                            Title: President and Chief
                                            Executive Officer

                                                   /s/ V. Ronald Mancuso
                                          By:__________________________________
                                            Name: V. Ronald Mancuso
                                            Title: Secretary

                                      A-51
<PAGE>

                                                                       EXHIBIT A

                              AGREEMENT OF MERGER

                                       OF

              SARATOGA BANCORP WITH AND INTO SJNB FINANCIAL CORP.

   THIS AGREEMENT OF MERGER, dated as of                   , 1999 (this "Merger
Agreement"), is made and entered into by and between SJNB FINANCIAL CORP., a
California corporation ("Surviving Corporation"), and SARATOGA BANCORP, a
California corporation ("Disappearing Corporation").

                              W I T N E S S E T H:

   WHEREAS, the Surviving Corporation, the Disappearing Corporation and
Saratoga National Bank, a national banking association organized under the laws
of the United States ("SNB"), have entered into an Agreement and Plan of Merger
dated as of August 27, 1999 (the "Agreement and Plan of Merger") which provides
for, among other things, the merger (the "Merger") of the Disappearing
Corporation with and into the Surviving Corporation; and

   WHEREAS, the Boards of Directors of the Surviving Corporation and the
Disappearing Corporation have approved, and deem it advisable and in the best
interests of the Surviving Corporation, the Disappearing Corporation and their
respective shareholders that the Surviving Corporation and the Disappearing
Corporation consummate the Merger.

   NOW, THEREFORE, in consideration of the mutual agreements contained in this
Merger Agreement, and for other good and valuable consideration, the receipt of
which is hereby acknowledged, the parties to this Merger Agreement hereby agree
that the Disappearing Corporation shall be merged with and into the Surviving
Corporation in accordance with the provisions of the Bank Holding Company Act
of 1956, as amended ("BHC Act") and other applicable law and upon the terms and
subject to the conditions set forth as follows:

   1. The Merger. On the Effective Date (as hereinafter defined), the
Disappearing Corporation shall be merged with and into the Surviving
Corporation. The Merger shall become effective on               ,      (the
"Effective Date"), on which date a copy of this Merger Agreement will be filed
with the Secretary of State of the State of California. The Merger shall become
effective at 12:01 a.m., California time, on the Effective Date (the "Effective
Time").

   2. Articles of Incorporation and By-laws. The Articles of Incorporation and
By-laws, respectively, of the Surviving Corporation in effect immediately prior
to the Effective Time shall be and remain the Articles of Incorporation and By-
laws, respectively, of the Surviving Corporation until amended as provided by
law.

   3. Officers and Directors. From and after the Effective Time and until they
shall have resigned or shall have been legally removed or until their
respective successors shall have been elected or appointed and qualified, (a)
the officers of the Surviving Corporation shall be those persons who are the
officers of the Surviving Corporation immediately prior to the Effective Time,
and (b) the directors of the Surviving Corporation shall be those persons who
are the directors of the Surviving Corporation immediately prior to the
Effective Time, together with five additional members of the Board of Directors
of the Surviving Corporation elected or appointed as of the Effective Date
pursuant to the terms of the Agreement and Plan of Merger and in accordance
with the By-laws of the Surviving Corporation.

   4. Effect of the Merger.

    4.1 All assets, rights, privileges, immunities, powers, franchises and
interests of the Disappearing Corporation and the Surviving Corporation in and
to every type of property (real, personal and mixed) and
<PAGE>

choses in action, as they exist as of the Effective Time, including
appointments, designations and nominations and all other rights and interests
as trustee, executor, administrator, registrar of stocks and bonds, guardian of
estates, assignee, receiver and in every other fiduciary capacity, shall pass
and be transferred to and vest in the Surviving Corporation by virtue of the
Merger at the Effective Time without any deed, conveyance or other transfer.
The corporate existence of the Surviving Corporation as a California
corporation shall continue unaffected and unimpaired upon consummation of the
Merger and the separate corporate existence of the Disappearing Corporation
shall cease at and as of the Effective Time.

    4.2 From and after the Effective Time, the Surviving Corporation shall be
responsible and liable for all the liabilities and obligations of each of the
Surviving Corporation and the Disappearing Corporation. Any claim existing or
action or proceeding pending by or against the Surviving Corporation or the
Disappearing Corporation at the Effective Time thereafter may be prosecuted as
if the Merger had not taken place or, in connection with any such action or
proceeding to which the Disappearing Corporation is a party, the Surviving
Corporation may be substituted in place of the Disappearing Corporation.
Neither the rights of creditors nor any liens upon the property of either the
Surviving Corporation or the Disappearing Corporation shall be impaired by
reason of the Merger.

   5. Effect of Merger on Outstanding Shares.

    5.1 Surviving Corporation. Each share of the common stock of the Surviving
Corporation issued and outstanding immediately prior to the Effective Time
shall continue to be issued and outstanding from and after the Effective Time.

    5.2 Disappearing Corporation. At the Effective Time, by virtue of the
Merger and without any action on the part of the holder of any shares of the
capital stock of the Disappearing Corporation (the "Saratoga Common Stock"),
(i) all shares of Saratoga Common Stock that are owned directly or indirectly
by the Surviving Corporation, the Disappearing Corporation or any of their
respective Subsidiaries (other than shares of Saratoga Common Stock held
directly or indirectly in trust accounts, managed accounts and the like or
otherwise held in a fiduciary or nominee capacity that are beneficially owned
by third parties and other than any shares of Saratoga Common Stock held by the
Surviving Corporation or the Disappearing Corporation or any of their
respective Subsidiaries in respect of a debt previously contracted) shall be
canceled and shall cease to exist and no stock of the Surviving Corporation or
other consideration shall be delivered in exchange therefor, and (ii) each of
the shares of Saratoga Common Stock issued and outstanding immediately prior to
the Effective Time (other than shares to be canceled in accordance with
subparagraph (i) above and Perfected Dissenting Shares (as defined below))
shall be converted into the right to receive 0.70 shares of fully paid and
nonassessable shares of Common Stock, no par value, of the Surviving
Corporation (the "SJNB Common Stock"). All such shares of Saratoga Common Stock
shall no longer be outstanding and shall automatically be canceled and retired
and shall cease to exist, and each certificate previously representing any such
shares shall thereafter represent the right to receive a certificate
representing the number of whole shares of SJNB Common Stock into which such
Saratoga Common Stock has been converted and, if applicable, the right to
receive cash in lieu of fractional shares. Certificates previously representing
shares of Saratoga Common Stock shall be exchanged for certificates
representing whole shares of SJNB Common Stock issued in consideration therefor
(and, if applicable, cash in lieu of fractional shares) upon the surrender of
such certificates.

   Notwithstanding any other provision hereof, no fractional shares of SJNB
Common Stock shall be issued to holders of shares of Saratoga Common Stock. In
lieu thereof, each such holder entitled to a fraction of a share of SJNB Common
Stock (after taking into account all shares of Saratoga Common Stock held at
the Effective Time by such holder) shall receive, at the time of surrender of
the certificates representing such holder's Saratoga Common Stock, an amount in
cash equal to the average of the closing prices of the SJNB Common Stock on the
Nasdaq National Market for the 20 consecutive trading days prior to five
business days prior to the Effective Date, rounded to four decimal places
(whether or not there were any trades in SJNB Common Stock on such days,
multiplied by the fraction of a share of SJNB Common Stock to which such holder
would otherwise be entitled. No such holder shall be entitled to dividends,
voting rights, interest on the value of, or any other rights in respect of a
fractional share.
<PAGE>

    5.3 Dissenters' Rights. Each outstanding share of Saratoga Common Stock,
the holder of which has complied with the provisions of Chapter 13 of the
California General Corporation Law ("CGCL") relating to dissenters' rights, is
herein called a "Dissenting Share." Dissenting Shares, the holders of which
have not effectively withdrawn or lost their dissenters' rights under the CGCL
("Perfected Dissenting Shares"), shall not be converted into SJNB Common Stock,
but the holders thereof shall be entitled only to such rights as are granted by
the CGCL. Each holder of Dissenting Shares who becomes entitled to payment for
his shares of Saratoga Common Stock pursuant to the provisions of the CGCL
shall receive payment therefor from the Surviving Corporation, but only after
the amount thereof shall have been agreed upon or finally determined in
accordance with the provisions of the CGCL.

   6. Further Assurances. From time to time as and when requested by the
Surviving Corporation and to the extent permitted by law, the officers and
directors of the Disappearing Corporation and the Surviving Corporation last in
office shall execute and deliver such assignments, deeds and other instruments
and shall take or cause to be taken such further or other action as shall be
necessary in order to vest or perfect in or to confirm of record or otherwise
to the Surviving Corporation title to, and possession of, all of the assets,
rights, franchises and interests of the Disappearing Corporation and the
Surviving Corporation in and to every type of property (real, personal and
mixed) and choses in action, and otherwise to carry out the purposes of this
Merger Agreement, and the proper officers and directors of the Surviving
Corporation are fully authorized to take any and all such action in the name of
the Disappearing Corporation or the Surviving Corporation or otherwise.

   7. Conditions to the Obligations of the Surviving Corporation. The
obligations of the Surviving Corporation under this Agreement are subject to
fulfillment at or prior to the Effective Time of the following condition:

    7.1 Government Approvals. All consents and approvals of any state or
federal governmental authority, including, without limitation, the Federal
Reserve Board, that are required by law or otherwise in connection with the
Merger (collectively, "Government Approvals") shall have been obtained and
shall be in effect, and all conditions or requirements prescribed by law or by
any such Government Approval shall have been satisfied.

   8. Disappearing Corporation. The obligations of the Disappearing Corporation
under this Agreement are subject to fulfillment at or prior to the Effective
Time of the following condition:

    8.1 Government Approvals. All Government Approvals shall have been obtained
and shall be in effect, and all conditions or requirements prescribed by law or
by any such Government Approval shall have been satisfied.

   9. Termination. This Merger Agreement may be terminated by the mutual
consent of the Boards of Directors of the Disappearing Corporation and the
Surviving Corporation, and may be amended with respect to its principal terms
by the mutual consent of the Boards of Directors of the Disappearing
Corporation and the Surviving Corporation and the approval of the shareholders
of the Disappearing Corporation and the Surviving Corporation. This Merger
Agreement shall terminate automatically upon the termination of the Agreement
and Plan of Merger prior to the consummation of the Merger therein provided
for.

    10. Counterparts. This Merger Agreement may be signed in any number of
counterparts, each of which shall be deemed an original, and all of which shall
be deemed but one and the same instrument.
<PAGE>

   IN WITNESS WHEREOF, the parties have duly executed this Merger Agreement as
of the date first written above.

                                          SJNB FINANCIAL CORP.

                                          By
                                            -----------------------------------
                                          Name:James R. Kenny
                                          Title:President and Chief Executive
                                           Officer

                                          By
                                            -----------------------------------
                                          Name:Jennifer Dowling
                                          Title:Assistant Secretary

                                          SARATOGA BANCORP

                                          By
                                            -----------------------------------
                                          Name:Richard L. Mount
                                          Title:President and Chief Executive
                                           Officer

                                          By
                                            -----------------------------------
                                          Name:
                                          Title:Secretary
<PAGE>

                             OFFICERS' CERTIFICATE

   James R. Kenny and Jennifer Dowling hereby certify that:

   1. They are the President and Chief Executive Officer and Assistant
Secretary, respectively, of SJNB FINANCIAL CORP., a California corporation.

   2. The Agreement of Merger in the form attached was duly approved by the
Board of Directors and the shareholders of the corporation.

   3. The shareholder approval was by the holders of a number of outstanding
shares which equaled or exceeded the vote required. The percentage vote
required was more than 50% of the outstanding shares.

   4. There is only one class of shares entitled to vote on the merger and the
number of shares outstanding is             .

   We further 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 our own knowledge.

   Date:                   ,

                                          -------------------------------------
                                          Name:James R. Kenny
                                          Title:President and Chief Executive
                                           Officer

                                          -------------------------------------
                                          Name:Jennifer Dowling
                                          Title:Assistant Secretary
<PAGE>

                             OFFICERS' CERTIFICATE

   Richard L. Mount and                      hereby certify that:

      1. TheThey are the President and Chief Executive Officer and Secretary,
respectively, of SARATOGA BANCORP, a California corporation.

   2. The Agreement of Merger in the form attached was duly approved by the
Board of Directors and the shareholders of the corporation.

   3. The shareholder approval was by the holders of a number of outstanding
shares which equaled or exceeded the vote required. The percentage vote
required was more than 50% of the outstanding shares.

   4. There is only one class of shares entitled to vote on the merger and the
number of shares outstanding is             .

   We further 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 our own knowledge.

   Date:                   ,

                                          -------------------------------------
                                          Name:Richard L. Mount
                                          Title:President and Chief Executive
                                           Officer

                                          -------------------------------------
                                          Name:
                                          Title:Secretary
<PAGE>

                                                                         ANNEX B

                             STOCK OPTION AGREEMENT

   STOCK OPTION AGREEMENT, dated August 27, 1999 (the "Agreement"), between
SJNB Financial Corp., a California corporation ("Buyer"), and Saratoga Bancorp,
a California corporation ("Seller").

                              W I T N E S S E T H:

   WHEREAS, Buyer, Seller and Saratoga National Bank (Seller's subsidiary) have
entered into an Agreement and Plan of Merger of even date herewith (the "Merger
Agreement"), which agreement has been executed by the parties hereto
immediately prior to this Agreement; and

   WHEREAS, as a condition to Buyer's entering into the Merger Agreement and in
consideration therefor, Seller has agreed to grant Buyer the Option (as
hereinafter defined):

   NOW, THEREFORE, in consideration of the foregoing and the mutual covenants
and agreements set forth herein and in the Merger Agreement, the parties hereto
agree as follows:

   1. (a) Seller hereby grants to Buyer an unconditional, irrevocable option
(the "Option") to purchase, subject to the terms hereof, up to 378,561 fully
paid and nonassessable shares of Seller's Common Stock, no par value ("Common
Stock"), at a price of $19.21 per share; provided, however, that in the event
Seller issues or agrees to issue any shares of Common Stock (other than
pursuant to warrants and options outstanding at the date hereof or as permitted
under the Merger Agreement) at a price less than $19.21 per share (as adjusted
pursuant to subsection (b) of Section 5), such price shall be equal to such
lesser price (such price, as adjusted if applicable, the "Option Price");
provided further that in no event shall the number of shares for which this
Option is exercisable exceed 19.9% of the Seller's issued and outstanding
shares of Common Stock. The number of shares of Common Stock that may be
received upon the exercise of the Option and the Option Price are subject to
adjustment as herein set forth.

   (b) In the event that any additional shares of Common Stock are issued or
otherwise become outstanding after the date hereof (other than pursuant to this
Agreement), the number of shares of Common Stock subject to the Option shall be
increased so that, after such issuance, it equals 19.9% of the number of shares
of Common Stock then issued and outstanding without giving effect to any shares
subject to or issued pursuant to the Option. Nothing contained in this Section
1(b) or elsewhere in this Agreement shall be deemed to authorize Seller or
Buyer to breach any provision of the Merger Agreement.

   2. (a) Provided that Buyer shall not be in material breach of this Agreement
or of its covenants and agreements contained in the Merger Agreement such that
Seller shall be entitled to terminate the Merger Agreement pursuant to Section
7.1(e)(i) thereof, and no preliminary or permanent injunction or other order
against exercise of the Option or delivery of the shares covered by the Option
issued by a court of competent jurisdiction is currently in effect, the Holder
(as hereinafter defined) may exercise the Option, in whole or in part, and from
time to time, if, but only if, both an Initial Triggering Event (as hereinafter
defined) and a Subsequent Triggering Event (as hereinafter defined) shall have
occurred prior to the occurrence of an Exercise Termination Event (as
hereinafter defined), provided that the Holder shall have sent written notice
of such exercise (as provided in subsection (e) of this Section 2) within 30
days following such Subsequent Triggering Event. Each of the following shall be
an Exercise Termination Event: (i) the Effective Time of the Merger;
(ii) termination of the Merger Agreement in accordance with the provisions
thereof if such termination occurs prior to the occurrence of an Initial
Triggering Event except a termination by Buyer pursuant to Section 7.1(d) of
the Merger Agreement (unless the breach by Seller giving rise to such right of
termination is non-volitional); (iii) the passage of 12 months after
termination of the Merger Agreement if such termination follows the

                                      B-1
<PAGE>

occurrence of an Initial Triggering Event except a termination by Buyer
pursuant to Section 7.1(d) thereof (unless the breach by Seller giving rise to
such right of termination is non-volitional) (provided that if an Initial
Triggering Event continues or occurs beyond such termination and prior to the
passage of such 12-month period, the Exercise Termination Event shall be 12
months from the expiration of the Last Triggering Event but in no event more
than 18 months after such termination); or (iv) the third anniversary of the
date hereof. The "Last Triggering Event" shall mean the last Initial Triggering
Event to occur. The term "Holder" shall mean the holder or holders of the
Option.

   (b) The term "Initial Triggering Event" shall mean any of the following
events or transactions occurring after the date hereof:

     (i) Seller or any of its Subsidiaries (each a "Seller Subsidiary") or
  any Seller Affiliate (as hereinafter defined), without having received
  Buyer's prior written consent, shall have entered into an agreement to
  engage in an Acquisition Transaction (as hereinafter defined) with any
  person (the term "person" for purposes of this Agreement having the meaning
  assigned thereto in sections 3(a)(9) and 13(d)(3) of the Securities
  Exchange Act of 1934 (the "Exchange Act"), and the rules and regulations
  thereunder) other than Buyer or any of its Subsidiaries (each a "Buyer
  Subsidiary") or the Board of Directors of Seller shall have recommended
  that the shareholders of Seller approve or accept any Acquisition
  Transaction other than as contemplated by the Merger Agreement. For
  purposes of this Agreement, "Acquisition Transaction" shall mean (x) a
  merger or consolidation, or any similar transaction, involving Seller or
  any Significant Subsidiary (as defined in Rule 1-02 of Regulation S-X
  promulgated by the Securities and Exchange Commission ("SEC") of Seller,
  (y) a purchase, lease or other acquisition representing 15% or more of the
  consolidated assets of Seller and its Subsidiaries, or (z) a purchase or
  other acquisition (including by way of merger, consolidation, share
  exchange or otherwise) of securities representing 10% or more of the voting
  power of Seller or any Significant Subsidiary of Seller; provided that the
  term "Acquisition Event" shall not include any transaction involving only
  Seller and/or any Seller Subsidiary.

     (ii) Seller or any Seller Subsidiary or Seller Affiliate, without having
  received Buyer's prior written consent, shall have authorized, recommended,
  proposed or publicly announced its intention to authorize, recommend or
  propose, to engage in an Acquisition Transaction with any person other than
  Buyer or a Buyer Subsidiary, or the Board of Directors of Seller shall have
  publicly withdrawn or modified, or publicly announced its intent to
  withdraw or modify, in any manner adverse to Buyer, its recommendation that
  the shareholders of Seller approve the transactions contemplated by the
  Merger Agreement;

     (iii) Any person other than Buyer, any Buyer Subsidiary or any Seller
  Subsidiary acting in a fiduciary capacity shall have acquired beneficial
  ownership or the right to acquire Beneficial Ownership (within the meaning
  of section 13(d) of the Exchange Act and the rules and regulations
  thereunder) of 10% or more of the outstanding shares of Common Stock;

     (iv) Any person other than Buyer or any Buyer Subsidiary shall have made
  a bona fide proposal to Seller or its shareholders by public announcement
  or written communication that is or becomes the subject of public
  disclosure to engage in an Acquisition Transaction;

     (v) After a proposal is made by a third party to Seller or its
  shareholders to engage in an Acquisition Transaction, Seller shall have
  breached any covenant or obligation contained in the Merger Agreement and
  such breach (x) would entitle Buyer to terminate the Merger Agreement and
  (y) shall not have been cured prior to the Notice Date (as defined below);
  or

     (vi) Any person other than Buyer or any Buyer Subsidiary, other than in
  connection with a transaction to which Buyer has given its prior written
  consent, shall have filed an application or notice with the Federal Reserve
  Board, or other federal or state bank regulatory authority, which
  application or notice has been accepted for processing, for approval to
  engage in an Acquisition Transaction.

   For purposes of this Agreement, the term "Seller Affiliate" shall mean any
Person who or which, together with all "affiliates" and "associates" (as such
terms are defined in Rule 12b-2 of the rules and regulations

                                      B-2
<PAGE>

under the Exchange Act) of such Person, shall be the "beneficial owner" (as
defined in section 13(d) of the Exchange Act and the rules and regulations
thereunder) ("Beneficial Owner") of 5% or more of the shares of Common Stock
then outstanding, but shall not include Seller, any Seller Subsidiary, any
employee benefit plan of the Seller or any Seller Subsidiary, or any entity
holding shares of Common Stock for or pursuant to the terms of any such plan.

   (c) The term "Subsequent Triggering Event" shall mean either of the
following events or transactions occurring after the date hereof:

     (i) The acquisition by any person (other than Buyer or any Buyer
  Subsidiary) of beneficial ownership of 20% or more of the then outstanding
  Common Stock; or

     (ii) The occurrence of the Initial Triggering Event described in clause
  (i) of subsection (b) of this Section 2, except that the percentage
  referred to in clause (z) shall be 20%.

   (d) Seller shall notify Buyer promptly in writing of the occurrence of any
Initial Triggering Event or Subsequent Triggering Event (together, a
"Triggering Event"), it being understood that the giving of such notice by
Seller shall not be a condition to the right of the Holder to exercise the
Option.

   (e) In the event the Holder is entitled to and wishes to exercise the
Option, it shall send to Seller a written notice (the date of which being
herein referred to as the "Notice Date") specifying (i) the total number of
shares it will purchase pursuant to such exercise and (ii) a place (subject to
Seller's reasonable approval) and date not earlier than three business days nor
later than 30 business days from the Notice Date for the closing of such
purchase (the "Closing Date"); provided, that if the closing of the purchase
and sale pursuant to the Option (the "Closing") cannot be consummated by reason
of any applicable judgment, decree, order, law or regulation, the period of
time that otherwise would run pursuant to this sentence shall run instead from
the date on which such restriction on consummation has expired or been
terminated; and provided further, without limiting the foregoing, that if prior
notification to or approval of the Federal Reserve Board or any other
regulatory agency is required in connection with such purchase, the Holder
shall promptly file the required notice or application for approval and shall
expeditiously process the same and the period of time that otherwise would run
pursuant to this sentence shall run instead from the date on which any required
notification periods have expired or been terminated or such approvals have
been obtained and any requisite waiting period or periods shall have passed.
Any exercise of the Option shall be deemed to occur on the Notice Date relating
thereto. Notwithstanding this subsection (e), in no event shall any Closing
Date be more than 18 months after the related Notice Date, and if the Closing
Date shall not have occurred within 18 months after the related Notice Date due
to the failure to obtain any such required approval, the exercise of the Option
effected on the Notice Date shall be deemed to have expired. In the event (i)
Buyer receives official notice that an approval of the Federal Reserve Board or
any other regulatory authority required for the purchase of Option Shares (as
hereinafter defined) would not be issued or granted, (ii) a Closing Date shall
not have occurred within 18 months after the related Notice Date due to the
failure to obtain any such required approval or (iii) Holder (or Substitute
Option Holder (as hereinafter defined)) shall have the right pursuant to the
last sentence of Section 7 (or Section 9) to exercise the Option (or Substitute
Option (as hereinafter defined)), Buyer shall nevertheless be entitled to
exercise its right as set forth in Section 7 and Buyer or Holder (or Substitute
Option Holder) shall be entitled to exercise the Option (or Substitute Option)
in connection with the resale of Seller Common Stock or other securities
pursuant to a registration statement as provided in Section 6.

   (f) At the Closing referred to in subsection (e) of this Section 2, the
Holder shall present and surrender this Agreement and pay to Seller the
aggregate purchase price for the shares of Common Stock purchased pursuant to
the exercise of the Option in immediately available funds by wire transfer to a
bank account designated by Seller, provided that failure or refusal of Seller
to designate such a bank account shall not preclude the Holder from exercising
the Option.

   (g) At such Closing, simultaneously with the delivery of immediately
available funds and surrender of this Agreement as provided in subsection (f)
of this Section 2, Seller shall deliver to the Holder a certificate or

                                      B-3
<PAGE>

certificates representing the number of shares of Common Stock purchased by the
Holder and, if the Option should be exercised in part only, a new Option
evidencing the rights of the Holder thereof to purchase the balance of the
shares purchasable hereunder, and the Holder shall deliver to Seller a letter
reasonably satisfactory to Seller by which Holder makes the representations and
covenants customary in the issuance of privately placed securities, including,
without limitation, agreements that the Holder will not offer to sell or
otherwise dispose of such shares in violation of applicable law or the
provisions of this Agreement.

   (h) Certificates for Common Stock delivered at a Closing hereunder may be
endorsed with a restrictive legend that shall read substantially as follows:

    "The transfer of the shares represented by this certificate is subject
    to certain provisions of an agreement between the registered holder
    hereof and Seller and to resale restrictions arising under the
    Securities Act of 1933, as amended. A copy of such agreement is on file
    at the principal office of Seller and will be provided to the holder
    hereof without charge upon receipt by Seller of a written request
    therefor."

   It is understood and agreed that: (i) the reference to the resale
restrictions of the Securities Act in the above legend shall be removed by
delivery of substitute certificate(s) without such reference if the Holder
shall have delivered to Seller a copy of a letter from the staff of the SEC, or
an opinion of counsel, in form and substance reasonably satisfactory to Seller,
to the effect that such legend is not required for purposes of the Securities
Act; (ii) the reference to the provisions of this Agreement in the above legend
shall be removed by delivery of substitute certificate(s) without such
reference if the shares have been sold or transferred in compliance with the
provisions of this Agreement and under circumstances that do not require the
retention of such reference; and (iii) the legend shall be removed in its
entirety if the conditions in the preceding clauses (i) and (ii) are both
satisfied. In addition, such certificates shall bear any other legend as may be
required by law.

   (i) Upon the giving by the Holder to Seller of the written notice of
exercise of the Option provided for under subsection (e) of this Section 2 and
the tender of the applicable purchase price in immediately available funds and
surrender of this Agreement to Seller, the Holder shall be deemed to be the
holder of record of the shares of Common Stock issuable upon such exercise,
notwithstanding that the stock transfer books of Seller shall then be closed or
that certificates representing such shares of Common Stock shall not then be
actually delivered to the Holder or the Seller shall have failed or refused to
designate the bank account described in subsection (f) of this Section 2.
Seller shall pay all expenses, and any and all United States federal, state and
local taxes and other charges that may be payable in connection with the
preparation, issuance and delivery of stock certificates under this Section 2
in the name of the Holder or its assignee, transferee or designee.

   3. Seller agrees: (i) that it shall at all times maintain, free from
preemptive rights, sufficient authorized but unissued shares of Common Stock
(and other securities issuable pursuant to Section 5(a)) so that the Option may
be exercised without additional authorization of Common Stock (or such other
securities) after giving effect to all other options, warrants, convertible
securities and other rights to purchase Common Stock (or such other
securities); (ii) that it will not, by charter amendment or through
reorganization, consolidation, merger, dissolution or sale of assets, or by any
other voluntary act, avoid or seek to avoid the observance or performance of
any of the covenants, stipulations or conditions to be observed or performed
hereunder by Seller; (iii) promptly to take all action as may from time to time
be required (including (x) complying with all premerger notification, reporting
and waiting period requirements specified in 15 U.S.C. (S) 18a and regulations
promulgated thereunder and (y) in the event, under the Bank Holding Company Act
of 1956, as amended ("BHCA"), or the Change in Bank Control Act of 1978, as
amended, or any state banking law, prior approval of or notice to the Federal
Reserve Board or to any state regulatory authority is necessary before the
Option may be exercised, cooperating fully with the Holder in preparing such
applications or notices and providing such information to the Federal Reserve
Board or such state regulatory authority as they may require) in order to
permit the Holder to exercise the Option and the Seller duly and effectively to
issue shares of Common Stock pursuant hereto; and (iv) promptly to take all
action provided herein to protect the rights of the Holder against dilution.

                                      B-4
<PAGE>

   4. This Agreement (and the Option granted hereby) are exchangeable, without
expense, at the option of the Holder, upon presentation and surrender of this
Agreement at the principal office of Seller, for other Agreements providing for
Options of different denominations entitling the holder thereof to purchase, on
the same terms and subject to the same conditions as are set forth herein, in
the aggregate the same number of shares of Common Stock purchasable hereunder.
The terms "Agreement" and "Option" as used herein include any Stock Option
Agreements and related Options for which this Agreement (and the Option granted
hereby) may be exchanged. Upon receipt by Seller of evidence reasonably
satisfactory to it of the loss, theft, destruction or mutilation of this
Agreement, and (in the case of loss, theft or destruction) of reasonably
satisfactory indemnification, and upon surrender and cancellation of this
Agreement, if mutilated, Seller will execute and deliver a new Agreement of
like tenor and date. Any such new Agreement executed and delivered shall
constitute an additional contractual obligation on the part of Seller, whether
or not the Agreement so lost, stolen, destroyed or mutilated shall at any time
be enforceable by anyone.

   5. In addition to the adjustment in the number of shares of Common Stock
that are purchasable upon exercise of the Option pursuant to Section 1 of this
Agreement, the number of shares of Common Stock purchasable upon the exercise
of the Option and the Option Price shall be subject to adjustment from time to
time as provided in this Section 5.

     (a) In the event of any change in, or distributions in respect of, the
  Common Stock by reason of stock dividends, split-ups, mergers,
  recapitalizations, combinations, subdivisions, conversions, exchanges of
  shares, distributions on or in respect of the Common Stock that would be
  prohibited under the terms of the Merger Agreement, or the like, the type
  and number of shares of Common Stock purchasable upon exercise hereof shall
  be appropriately adjusted so that Buyer shall receive upon exercise of the
  Option and payment of the aggregate Option Price hereunder the number and
  class of shares or other securities or property that Buyer would have
  received in respect of Common Stock if the Option had been exercised in
  full immediately prior to such event, or the record date therefor, as
  applicable.

     (b) Whenever the number of shares of Common Stock purchasable upon
  exercise hereof is adjusted as provided in this Section 5, the Option Price
  shall be adjusted by multiplying the Option Price by a fraction, the
  numerator of which shall be equal to the number of shares of Common Stock
  purchasable prior to the adjustment and the denominator of which shall be
  equal to the number of shares of Common Stock purchasable after the
  adjustment.

   6. Upon the occurrence of a Subsequent Triggering Event that occurs prior to
an Exercise Termination Event (or as otherwise provided in the last sentence of
Section 2(e)), Seller shall, at the request of Buyer, which request shall be
delivered within 30 days after such Subsequent Triggering Event (or such
trigger date as is provided in the last sentence of Section 2(e)) (whether on
its own behalf or on behalf of any subsequent holder of this Option (or part
thereof) or any of the shares of Common Stock issued pursuant hereto), promptly
prepare, file and keep current a shelf registration statement under the
Securities Act covering this Option and any shares issued and issuable pursuant
to this Option and shall use its best efforts to cause such registration
statement to become effective and remain current in order to permit the sale or
other disposition of this Option and any shares of Common Stock issued upon
total or partial exercise of this Option ("Option Shares") in accordance with
any plan of disposition requested by Buyer. Seller will use its best efforts to
cause such registration statement first to become effective and then to remain
effective for such period not in excess of 180 days from the date such
registration statement first becomes effective or such shorter time as may be
reasonably necessary to effect such sales or other dispositions. Buyer, for a
period of 18 months following such first request, shall have the right to
demand a second such registration if reasonably necessary to effect such sales
or dispositions. The foregoing notwithstanding, if, at the time of any request
by Buyer for registration of the Option or the Option Shares as provided above,
Seller is in registration with respect to an underwritten public offering of
shares of Common Stock, and if, in the good faith judgment of the managing
underwriter or managing underwriters, or, if none, the sole underwriter or
underwriters, of such offering, the inclusion of the Holder's Option or Option
Shares would interfere with the successful marketing of the shares of Common
Stock offered by Seller, the number of Option Shares otherwise to be covered in
the registration statement

                                      B-5
<PAGE>

contemplated hereby may be reduced; and provided, however, that after any such
required reduction the number of Option Shares to be included in such offering
for the account of the Holder shall constitute at least 25% of the total number
of shares to be sold by the Holder and Seller in the aggregate; and provided
further, however, that if such reduction occurs, then the Seller shall file a
registration statement for the balance as promptly as practical and no
reduction shall thereafter occur (and such registration shall not be charged
against the Holder). Each such Holder shall provide all information reasonably
requested by Seller for inclusion in any registration statement to be filed
hereunder. If requested by any such Holder in connection with such
registration, Seller shall become a party to any underwriting agreement
relating to the sale of such shares, but only to the extent of obligating
itself in respect of representations, warranties, indemnities and other
agreements customarily included in such underwriting agreements for the Seller.
Upon receiving any request under this Section 6 from any Holder, Seller agrees
to send a copy thereof to any other person known to Seller to be entitled to
registration rights under this Section 6, in each case by promptly mailing the
same, postage prepaid, to the address of record of the persons entitled to
receive such copies.

   7. (a) Upon the occurrence of a Subsequent Triggering Event that occurs
prior to an Exercise Termination Event, (i) at the request of the Holder,
delivered within 30 days after such occurrence (or such later period as
provided in Section 10 or the last sentence of Section 2(e)), Seller (or any
successor thereto) shall repurchase the Option from the Holder at a price (the
"Option Repurchase Price") equal to the amount by which (A) the market/offer
price (as defined below) exceeds (B) the Option Price, multiplied by the number
of shares for which this Option may then be exercised and (ii) at the request
of the owner of Option Shares from time to time (the "Owner"), delivered within
30 days after such occurrence (or such later period as provided in Section 10),
Seller shall repurchase such number of the Option Shares from the Owner as the
Owner shall designate at a price (the "Option Share Repurchase Price") equal to
the market/offer price multiplied by the number of Option Shares so designated.
The term "market/offer price" shall mean the highest of (i) the highest price
per share of Common Stock at which a tender offer or exchange offer therefor
has been made, (ii) the price per share of Common Stock to be paid by any third
party pursuant to an agreement with Seller, (iii) the highest closing price for
shares of Common Stock quoted in the New York Stock Exchange (or if Common
Stock is not quoted in the New York Stock Exchange, the highest bid price per
share as quoted on the National Association of Securities Dealers Automated
Quotation Systems, or, if the shares of Common Stock are not quoted thereon, on
the principal trading market on which such shares are traded as reported by a
recognized source) within the six-month period immediately preceding the date
the Holder gives notice of the required repurchase of Option Shares, as the
case may be, or (iv) in the event of a sale of assets representing 15% or more
of the consolidated assets of Seller and its Subsidiaries, the sum of the price
paid in such sale for such assets and the current market value of the remaining
assets of Seller as determined by a nationally recognized investment banking
firm selected by the Holder or the Owner, as the case may be, divided by the
number of shares of Common Stock of Seller outstanding at the time of such
sale. In determining the market/offer price, the value of consideration other
than cash shall be determined by a nationally recognized investment banking
firm selected by the Holder or Owner, as the case may be.

   (b) The Holder or the Owner, as the case may be, may exercise its right to
require Seller to repurchase the Option and any Option Shares pursuant to this
Section 7 by surrendering for such purpose to Seller, at its principal office,
this Agreement or certificates for Option Shares, as applicable, accompanied by
a written notice or notices stating that the Holder or the Owner, as the case
may be, elects to require Seller to repurchase this Option and/or the Option
Shares in accordance with the provisions of this Section 7. As promptly as
practicable, and in any event within five business days after the surrender of
the Option and/or certificates representing Option Shares and the receipt of
such notice or notices relating thereto, Seller shall deliver or cause to be
delivered to the Holder the Option Repurchase Price and/or to the Owner the
Option Share Repurchase Price therefor or the portion thereof that Seller is
not then prohibited under applicable law and regulation from so delivering.

   (c) To the extent that Seller is prohibited under applicable law or
regulation, or as a consequence of administrative policy, from repurchasing the
Option and/or the Option Shares in full, Seller shall immediately

                                      B-6
<PAGE>

so notify the Holder and/or the Owner and thereafter deliver or cause to be
delivered, from time to time, to the Holder and/or the Owner, as appropriate,
the portion of the Option Repurchase Price and the Option Share Repurchase
Price, respectively, that it is no longer prohibited from delivering, within
five business days after the date on which Seller is no longer so prohibited;
provided, however, that if Seller at any time after delivery of a notice of
repurchase pursuant to paragraph (b) of this Section 7 is prohibited under
applicable law or regulation, or as a consequence of administrative policy,
from delivering to the Holder and/or the Owner, as appropriate, the Option
Repurchase Price and the Option Share Repurchase Price, respectively, in full
(and Seller hereby undertakes to use its best efforts to obtain all required
regulatory and legal approvals and to file any required notices as promptly as
practicable in order to accomplish such repurchase), the Holder or Owner may
revoke its notice of repurchase of the Option or the Option Shares either in
whole or to the extent of the prohibition, whereupon, in the latter case,
Seller shall promptly (i) deliver to the Holder and/or the Owner, as
appropriate, that portion of the Option Repurchase Price or the Option Share
Repurchase Price that Seller is not prohibited from delivering; and (ii)
deliver, as appropriate, either (A) to the Holder, a new Stock Option Agreement
evidencing the right of the Holder to purchase that number of shares of Common
Stock for which the surrendered Stock Option Agreement was exercisable
immediately prior to the time of delivery of the notice of repurchase less the
number of shares of Common Stock covered by the portion of the Option Shares
repurchased, or (B) to the Owner, a certificate for the Option Shares it is
then so prohibited from repurchasing. If an Exercise Termination Event shall
have occurred prior to the date of the notice by Seller described in the first
sentence of this subsection (c), or shall be scheduled to occur at any time
before the expiration of a period ending on the thirtieth day after such date,
the Holder shall nonetheless have the right to exercise the Option until the
expiration of such 30-day period.

   8. (a) In the event that prior to an Exercise Termination Event, Seller
shall enter into an agreement (i) to consolidate with or merge into any person,
other than Buyer or one of its Subsidiaries, and shall not be the continuing or
surviving corporation of such consolidation or merger, (ii) to permit any
person, other than Buyer or one of its Subsidiaries, to merge into Seller and
Seller shall be the continuing or surviving corporation, but, in connection
with such merger, the then outstanding shares of Common Stock shall be changed
into or exchanged for stock or other securities of any other person or cash or
any other property or the then outstanding shares of Common Stock shall after
such merger represent less than 50% of the outstanding shares and share
equivalents of the merged company, or (iii) to sell or otherwise transfer all
or substantially all of its assets to any person, other than Buyer or one of
its Subsidiaries, then, and in each such case, the agreement governing such
transaction shall make proper provision so that the Option shall, upon the
consummation of any such transaction and upon the terms and conditions set
forth herein, be converted into, or exchanged for, an option (the "Substitute
Option"), at the election of the Holder, of either (x) the Acquiring
Corporation (as hereinafter defined) or (y) any person that controls the
Acquiring Corporation.

   (b) The following terms have the meanings indicated:

     (1) "Acquiring Corporation" shall mean (i) the continuing or surviving
  corporation of a consolidation or merger with Seller (if other than
  Seller), (ii) Seller in a merger in which Seller is the continuing or
  surviving person, and (iii) the transferee of all or substantially all of
  Seller's assets.

     (2) "Substitute Common Stock" shall mean the common stock issued by the
  issuer of the Substitute Option upon exercise of the Substitute Option.

     (3) "Assigned Value" shall mean the market/offer price, as defined in
  Section 7.

     (4) "Average Price" shall mean the average closing price of a share of
  the Substitute Common Stock for the one year immediately preceding the
  consolidation, merger or sale in question, but in no event higher than the
  closing price of the shares of Substitute Common Stock on the date
  preceding such consolidation, merger or sale; provided that if Seller is
  the issuer of the Substitute Option, the Average Price shall be computed
  with respect to a share of common stock issued by the person merging into
  Seller or by any company which controls or is controlled by such person, as
  the Holder may elect.

                                      B-7
<PAGE>

   (c) The Substitute Option shall have the same terms as the Option, provided
that if the terms of the Substitute Option cannot, for legal reasons, be the
same as the Option, such terms shall be as similar as possible and in no event
less advantageous to the Holder. The issuer of the Substitute Option shall also
enter into an agreement with the then Holder or Holders of the Substitute
Option in substantially the same form as this Agreement (after giving effect
for such purpose to the provisions of Section 9), which agreement shall be
applicable to the Substitute Option.

   (d) The Substitute Option shall be exercisable for such number of shares of
Substitute Common Stock as is equal to the Assigned Value multiplied by the
number of shares of Common Stock for which the Option is then exercisable,
divided by the Average Price. The exercise price of the Substitute Option per
share of Substitute Common Stock shall then be equal to the Option Price
multiplied by a fraction, the numerator of which shall be the number of shares
of Common Stock for which the Option is then exercisable and the denominator of
which shall be the number of shares of Substitute Common Stock for which the
Substitute Option is exercisable.

   (e) In no event, pursuant to any of the foregoing paragraphs, shall the
Substitute Option be exercisable for more than 19.9% of the shares of
Substitute Common Stock outstanding prior to the exercise of the Substitute
Option. In the event that the Substitute Option would be exercisable for more
than 19.9% of the shares of Substitute Common Stock outstanding prior to
exercise but for this clause (e), the issuer of the Substitute Option (the
"Substitute Option Seller") shall make a cash payment to Holder equal to the
excess of (i) the value of the Substitute Option without giving effect to the
limitation in this clause (e) over (ii) the value of the Substitute Option
after giving effect to the limitation in this clause (e). This difference in
value shall be determined by a nationally recognized investment banking firm
selected by the Holder.

   (f) Seller shall not enter into any transaction described in subsection (a)
of this Section 8 unless the Acquiring Corporation and any person that controls
the Acquiring Corporation assume in writing all the obligations of Seller
hereunder.

   9. (a) At the request of the holder of the Substitute Option (the
"Substitute Option Holder"), the Substitute Option Seller shall repurchase the
Substitute Option from the Substitute Option Holder at a price (the "Substitute
Option Repurchase Price") equal to the amount by which (i) the Highest Closing
Price (as hereinafter defined) exceeds (ii) the exercise price of the
Substitute Option, multiplied by the number of shares of Substitute Common
Stock for which the Substitute Option may then be exercised, and at the request
of the owner (the "Substitute Share Owner") of shares of Substitute Common
Stock (the "Substitute Shares"), the Substitute Option Seller shall repurchase
the Substitute Shares at a price (the "Substitute Share Repurchase Price")
equal to the Highest Closing Price multiplied by the number of Substitute
Shares so designated. The term "Highest Closing Price" shall mean the highest
closing price for shares of Substitute Common Stock within the six-month period
immediately preceding the date the Substitute Option Holder gives notice of the
required repurchase of the Substitute Option or the Substitute Share Owner
gives notice of the required repurchase of the Substitute Shares, as
applicable.

   (b) The Substitute Option Holder and the Substitute Share Owner, as the case
may be, may exercise its respective right to require the Substitute Option
Seller to repurchase the Substitute Option and the Substitute Shares pursuant
to this Section 9 by surrendering for such purpose to the Substitute Option
Seller, at its principal office, the agreement for such Substitute Option (or,
in the absence of such an agreement, a copy of this Agreement) and certificates
for Substitute Shares accompanied by a written notice or notices stating that
the Substitute Option Holder or the Substitute Share Owner, as the case may be,
elects to require the Substitute Option Seller to repurchase the Substitute
Option and/or the Substitute Shares in accordance with the provision of this
Section 9. As promptly as practicable, and in any event within five business
days after the surrender of the Substitute Option and/or certificates
representing Substitute Shares and the receipt of such notice or notices
relating thereto, the Substitute Option Seller shall deliver or cause to be
delivered to the Substitute Option Holder the Substitute Option Repurchase
Price and/or to the Substitute Share Owner the Substitute Share Repurchase
Price therefor or the portion thereof which the Substitute Option Seller is not
then prohibited under applicable law and regulation, or as a consequence of
administrative policy, from so delivering.


                                      B-8
<PAGE>

   (c) To the extent that the Substitute Option Seller is prohibited under
applicable law or regulation, or as a consequence of administrative policy,
from repurchasing the Substitute Option and/or the Substitute Shares in part or
in full, the Substitute Option Seller shall immediately so notify the
Substitute Option Holder and/or the Substitute Share Owner and thereafter
deliver or cause to be delivered, from time to time, to the Substitute Option
Holder and/or the Substitute Share Owner, as appropriate, the portion of the
Substitute Option Repurchase Price or the Substitute Share Repurchase Price,
respectively, which it is no longer prohibited from delivering, within five
business days after the date on which the Substitute Option Seller is no longer
so prohibited; provided, however, that if the Substitute Option Seller is at
any time after delivery of a notice of repurchase pursuant to subsection (b) of
this Section 9 prohibited under applicable law or regulation, or as a
consequence of administrative policy, from delivering to the Substitute Option
Holder and/or the Substitute Share Owner, as appropriate, the Substitute Option
Repurchase Price and the Substitute Share Repurchase Price, respectively, in
full (and the Substitute Option Seller shall use its best efforts to receive
all required regulatory and legal approvals as promptly as practicable in order
to accomplish such repurchase), the Substitute Option Holder or Substitute
Share Owner may revoke its notice of repurchase of the Substitute Option or the
Substitute Shares either in whole or to the extent of the prohibition,
whereupon, in the latter case, the Substitute Option Seller shall promptly (i)
deliver to the Substitute Option Holder or Substitute Share Owner, as
appropriate, that portion of the Substitute Option Repurchase Price or the
Substitute Share Repurchase Price that the Substitute Option Seller is not
prohibited from delivering; and (ii) deliver, as appropriate, either (A) to the
Substitute Option Holder, a new Substitute Option evidencing the right of the
Substitute Option Holder to purchase that number of shares of the Substitute
Common Stock obtained by multiplying the number of shares of the Substitute
Common Stock for which the surrendered Substitute Option was exercisable at the
time of delivery of the notice of repurchase by a fraction, the numerator of
which is the Substitute Option Repurchase Price less the portion thereof
theretofore delivered to the Substitute Option Holder and the denominator of
which is the Substitute Option Repurchase Price, or (B) to the Substitute Share
Owner, a certificate for the Substitute Option Shares it is then so prohibited
from repurchasing. If an Exercise Termination Event shall have occurred prior
to the date of the notice by the Substitute Option Seller described in the
first sentence of this subsection (c), or shall be scheduled to occur at any
time before the expiration of a period ending on the thirtieth day after such
date, the Substitute Option Holder shall nevertheless have the right to
exercise the Substitute Option until the expiration of such 30-day period.

   10. The 30-day period for exercise of certain rights under Sections 2, 6, 7,
9 and 13 shall be extended: (i) to the extent necessary to obtain all
regulatory approvals for the exercise of such rights, and for the expiration of
all statutory waiting periods; and (ii) to the extent necessary to avoid
liability under section 16(b) of the Exchange Act by reason of such exercise.

   11. Seller hereby represents and warrants to Buyer as follows:

   (a) Seller has full corporate power and authority to execute and deliver
this Agreement and, subject to any approvals or consents referred to herein, to
consummate the transactions contemplated hereby. The execution and delivery of
this Agreement and the consummation of the transactions contemplated hereby
have been duly and validly authorized by the Board of Directors of Seller and
no other corporate proceedings on the part of Seller are necessary to authorize
this Agreement or to consummate the transactions so contemplated. This
Agreement has been duly and validly executed and delivered by Seller. This
Agreement is the valid and legally binding obligation of Seller, enforceable
against Seller in accordance with its terms.

   (b) Seller has taken all necessary corporate action to authorize and reserve
and to permit it to issue, and at all times from the date hereof through the
termination of this Agreement in accordance with its terms will have reserved
for issuance upon the exercise of the Option, that number of shares of Common
Stock equal to the maximum number of shares of Common Stock at any time and
from time to time issuable hereunder, and all such shares, upon issuance
pursuant hereto and payment of the aggregate Option Price therefor, will be
duly authorized, validly issued, fully paid, nonassessable, and will be
delivered free and clear of all claims, liens, encumbrance and security
interests and not subject to any preemptive rights.

                                      B-9
<PAGE>

   (c) Except as disclosed pursuant to the Merger Agreement, the execution and
delivery of this Agreement does not, and the consummation of the transactions
contemplated hereby will not, conflict with, or result in any violation of, or
default under, or give rise to a right of termination, cancellation or
acceleration of any obligation or loss of a material benefit under, or the
creation of a lien, pledge, security interest, charge or other encumbrance on
assets (any such conflict, violation, default, right of termination,
cancellation or acceleration, loss or creation, a "Violation") pursuant to any
provisions of the Articles of Incorporation or by-laws of Seller or any Seller
Subsidiary or, subject to obtaining any approvals or consents contemplated
hereby, result in any Violation of any loan or credit agreement, note,
mortgage, indenture, lease, Plan or other agreement, obligation, instrument,
permit, concession, franchise, license, judgment, order, decree, statute, law,
ordinance, rule or regulation applicable to Seller or any Seller Subsidiary or
their respective properties or assets which Violation would have a Material
Adverse Effect on Seller.

   12. Buyer hereby represents and warrants to Seller as follows:

   (a) Buyer has full corporate power and authority to execute and deliver this
Agreement and, subject to any approvals or consents referred to herein, to
consummate the transactions contemplated hereby. The execution and delivery of
this Agreement and the consummation of the transactions contemplated hereby
have been duly and validly authorized by the Board of Directors of Buyer and no
other corporate proceedings on the part of Buyer are necessary to authorize
this Agreement or to consummate the transactions so contemplated. This
Agreement has been duly and validly executed and delivered by Buyer. This
Agreement is the valid and legally binding obligation of Buyer, enforceable
against Buyer in accordance with its terms.

   (b) The Option is not being, and any shares of Common Stock or other
securities acquired by Buyer upon exercise of the Option will not be, acquired
with a view to the public distribution thereof and will not be transferred or
otherwise disposed of except in a transaction registered or exempt from
registration under the Securities Act.

   13. Neither of the parties hereto may assign any of its rights or
obligations under this Option Agreement or the Option created hereunder to any
other person, without the express written consent of the other party, except
that in the event a Subsequent Triggering Event shall have occurred prior to an
Exercise Termination Event, Buyer, subject to the express provisions hereof,
may assign in whole or in part its rights and obligations hereunder within 30
days following such Subsequent Triggering Event (or such later period as
provided in Section 10); provided, however, that until the date 15 days
following the date on which the Federal Reserve Board approves an application
by Buyer under the BHCA to acquire the shares of Common Stock subject to the
Option, Buyer may not assign its rights under the Option except in (i) a widely
dispersed public distribution, (ii) a private placement in which no one party
acquires the right to purchase in excess of 2% of the voting shares of Seller,
(iii) an assignment to a single party (e.g., a broker or investment banker) for
the purpose of conducting a widely dispersed public distribution on Buyer's
behalf, or (iv) any other manner approved by the Federal Reserve Board. Any
such assignment shall be made in compliance with and subject to applicable
Federal and state laws, rules and regulations.

   14. Immediately following an Initial Triggering Event, each of Buyer and
Seller will use its best efforts to make all filings with, and to obtain
consents of, all third parties and governmental authorities necessary to the
consummation of the transactions contemplated by this Agreement, including
without limitation, making application to list the shares of Common Stock
issuable hereunder on the Nasdaq upon official notice of issuance and applying
to the Federal Reserve Board under the BHCA for approval to acquire the shares
issuable hereunder, but Buyer shall not be obligated to apply to state banking
authorities for approval to acquire the shares of Common Stock issuable
hereunder until such time, if ever, as it deems appropriate to do so.

   15. Notwithstanding anything to the contrary herein, in the event that the
Holder or Owner or any Related Person thereof is a person making, without the
prior written consent of Seller, an offer or proposal to engage in an
Acquisition Transaction (other than the transaction contemplated by the Merger
Agreement), then (i) in the case of a Holder or any Related Person thereof, the
Option held by it shall immediately terminate and

                                      B-10
<PAGE>

be of no further force or effect, and (ii) in the case of an Owner or any
Related Person thereof, the Option Shares held by it shall be immediately
repurchasable by Seller at the Option Price. A Related Person of a Holder or
Owner means any "affiliate" (as defined in Rule 12b-2 of the rules and
regulations under the Exchange Act) of the Holder or Owner and any person that
is the beneficial owner of 20% or more of the voting power of the Holder or
Owner, as the case may be.

   16. The parties hereto acknowledge that damages would be an inadequate
remedy for a breach of this Agreement by either party hereto and that the
obligations of the parties hereto shall be enforceable by either party hereto
through injunctive or other equitable relief.

   17. If any term, provision, covenant or restriction contained in this
Agreement is held by a court or a Federal or state regulatory agency of
competent jurisdiction to be invalid, void or unenforceable, the remainder of
the terms, provisions and covenants and restrictions contained in this
Agreement shall remain in full force and effect, and shall in no way be
affected, impaired or invalidated. If for any reason such court or regulatory
agency determines that the Holder or Substitute Option Holder is not permitted
to acquire, or Seller or Substitute Option Seller is not permitted to
repurchase, pursuant to Section 7 or Section 9, as the case may be, the full
number of shares of Common Stock provided in Section 1(a) hereof (as adjusted
pursuant to Section 1(b) or Section 5 hereof), it is the express intention of
Seller to allow the Holder to acquire or to require Seller to repurchase such
lesser number of shares as may be permissible, without any amendment or
modification hereof.

   18. All notices, requests, claims, demands and other communications
hereunder shall be deemed to have been duly given when delivered in person, by
cable, telegram, telecopy or telex, or by registered or certified mail (postage
prepaid, return receipt requested) at the respective addresses of the parties
set forth in the Merger Agreement.

   19. This Agreement shall be governed by and construed in accordance with the
laws of the State of California, regardless of the laws that might otherwise
govern under applicable principles of conflicts of laws thereof.

   20. This Agreement may be executed in two or more counterparts, each of
which shall be deemed to be an original, but all of which shall constitute one
and the same agreement.

   21. Except as otherwise expressly provided herein or in the Merger
Agreement, each of the parties hereto shall bear and pay all costs and expenses
incurred by it or on its behalf in connection with the transactions
contemplated hereunder, including fees and expenses of its own financial
consultants, investment bankers, accountants and counsel.

   22. Except as otherwise expressly provided herein or in the Merger
Agreement, this Agreement contains the entire agreement between the parties
with respect to the transactions contemplated hereunder and supersedes all
prior arrangements or understandings with respect thereof, written or oral. The
terms and conditions of this Agreement shall inure to the benefit of and be
binding upon the parties hereto and their respective successors and permitted
assigns. Nothing in this Agreement, expressed or implied, is intended to confer
upon any party, other than the parties hereto, and their respective successors
and assigns, any rights, remedies, obligations or liabilities under or by
reason of this Agreement, except as expressly provided herein. Any provision of
this Agreement may be waived at any time by the party that is entitled to the
benefits of such provision. This Agreement may not be modified, amended,
altered or supplemented except upon the execution and delivery of a written
agreement executed by the parties hereto.

   23. In the event of any exercise of the Option by Buyer, Seller and Buyer
shall execute and deliver all other documents and instruments and take all
other action that may be reasonably necessary in order to consummate the
transactions provided for by such exercise.

   24. Capitalized terms used in this Agreement and not defined herein shall
have the meanings assigned thereto in the Merger Agreement.

                                      B-11
<PAGE>

   IN WITNESS WHEREOF, Seller and Buyer have caused this Agreement to be signed
by their respective officers thereunto duly authorized, all as of the date
first written above.

                                          SARATOGA BANCORP

                                          By: /s/ Richard L. Mount
                                             ----------------------------------

                                          Name: Richard L. Mount
Attest: /s/ V. Ronald Mancuso
   -------------------------------        Title:  President and Chief
                                          Executive Officer

Name: V. Ronald Mancuso

Title: Secretary

                                          SJNB FINANCIAL CORP.

                                          By: /s/ James R. Kenny
                                             ----------------------------------

                                          Name: James R. Kenny
Attest: /s/ Jennifer Dowling
   -------------------------------        Title:  President and Chief
                                          Executive Officer

Name: Jennifer Dowling

Title:  Assistant Corporate Secretary

                                      B-12
<PAGE>

                                                                         ANNEX C

                        [FIRST SECURITY VAN KASPER LOGO]

October 29, 1999

Members of the Board of Directors
Saratoga Bancorp
12000 Saratoga-Sunnyvale Rd.
Saratoga, CA 95070

Members of the Board:

   You have requested our opinion as investment bankers as to the fairness,
from a financial point of view, to the shareholders of Saratoga Bancorp
("Saratoga") of the Exchange Ratio as defined in Section 2.1(a) of the
Agreement and Plan of Reorganization dated as of August 27, 1999 (the
"Agreement"), in the proposed merger (the "Merger") of SJNB Financial Corp.
("SJNB") and Saratoga. On the Effective Time (as such term is defined in the
Agreement), each share of Saratoga Common Stock will be converted into the
right to receive 0.70 shares of SJNB Common Stock subject to adjustment as
defined in the Agreement.

   In arriving at our opinion, we have reviewed and analyzed, among other
things, the following: (i) the Agreement; (ii) certain publicly available
financial and other data with respect to SJNB and Saratoga, including
consolidated financial statements for recent years and interim periods to
September 30, 1999; (iii) certain other publicly available financial and other
information concerning SJNB and Saratoga and the trading markets for the
publicly traded securities of SJNB and Saratoga; (iv) publicly available
information concerning other banks and bank holding companies, the trading
markets for their securities and the nature and terms of certain other merger
transactions we believed relevant to our inquiry; and (v) evaluations and
analyses prepared and presented to the Board of Directors of Saratoga or a
committee thereof in connection with the Merger. We have held discussions with
senior management of SJNB and Saratoga concerning the companies' past and
current operations, financial condition and prospects.

   We have reviewed with the senior management of Saratoga earnings projections
for Saratoga as a stand-alone entity, assuming the Merger does not occur. We
have also reviewed earnings projections for SJNB as a stand-alone entity,
assuming the Merger does not occur as well as securities industry consensus
estimates of projected earnings per share from published sources for SJNB as a
stand-alone entity. Certain financial projections for the combined companies
and for Saratoga and SJNB as stand-alone entities were derived by us based
partially upon the projections and information described above, as well as our
own assessment of general economic, market and financial conditions.

   In conducting our review and in arriving at our opinion, we have relied upon
and assumed the accuracy and completeness of the financial and other
information provided to us or publicly available, and we have not assumed any
responsibility for independent verification of the same. We have relied on
advice of counsel and independent accountants as to all legal and financial
reporting matters with respect to SJNB, Saratoga, the Merger and the Agreement.
We have relied upon the managements of Saratoga and SJNB as to the
reasonableness of the financial and operating forecasts, projections and
projected operating cost savings (and the assumptions and bases therefor)
provided to us, and we have assumed that such forecasts, projections and
projected operating cost savings reflect the best currently available estimates
and judgments of the applicable managements. We have also assumed, without
assuming any responsibility for the independent verification of

                                      C-1
<PAGE>

same, that the aggregate allowances for loan losses for Saratoga and SJNB are
adequate to cover such losses. We have not made or obtained any evaluations or
appraisals of the property of Saratoga or SJNB, nor have we examined any
individual loan credit files. For purposes of this opinion, we have assumed
that the Merger will have the tax, accounting and legal effects (including,
without limitation, that the Merger will be accounted for as a pooling of
interests) described in the Agreement. Our opinion as expressed herein is
limited to the fairness, from a financial point of view, to the holders of the
Common Stock of Saratoga of the Exchange Ratio in the Merger and does not
address Saratoga's underlying business decision to proceed with the Merger.

   We have considered such financial and other factors as we have deemed
appropriate under the circumstances, including among others the following: (i)
the historical and current financial position and results of operations of
Saratoga and SJNB, including interest income, interest expense, net interest
income, net interest margin, provision for loan losses, non-interest income,
non-interest expense, earnings, dividends, internal capital generation, book
value, intangible assets, return on assets, return on shareholders' equity,
capitalization, the amount and type of non-performing assets, loan losses and
the reserve for loan losses, all as set forth in the financial statements for
Saratoga and for SJNB; (ii) the assets and liabilities of Saratoga and SJNB,
including the loan, investment and mortgage portfolios, deposits, other
liabilities, historical and current liability sources and costs and liquidity;
and (iii) the nature and terms of certain other merger transactions involving
banks and bank holding companies. We have also taken into account our
assessment of general economic, market and financial conditions and our
experience in other transactions, as well as our experience in securities
valuation and our knowledge of the banking industry generally. Our opinion is
necessarily based upon conditions as they exist and can be evaluated on the
date hereof and the information made available to us through the date hereof.

   It is understood that this letter is for the information of the Board of
Directors of Saratoga. This letter does not constitute a recommendation to the
Board of Directors or to any shareholder of Saratoga with respect to any
approval of the Merger. This opinion is not to be quoted or referred to, in
whole or in part, in any registration statement, prospectus or proxy statement,
or in any other document used in connection with the offering or sale of
securities, nor shall this letter be used for any other purposes, without our
prior written consent.

   Based upon and subject to the foregoing, we are of the opinion as investment
bankers that, as of the date hereof, the Exchange Ratio in the Merger is fair,
from a financial point of view, to the holders of the Common Stock of Saratoga.

Very truly yours,

/s/ First Security Van Kasper
First Security Van Kasper

                                      C-2
<PAGE>

                                                                         ANNEX D

                   [LOGO OF SANDLER O'NEILL & PARTNERS, L.P.]

October 22, 1999

Board of Directors
SJNB Financial Corp.
One North Market Street
San Jose, CA 95113

Ladies and Gentlemen:

   SJNB Financial Corp. ("SJNB"), Saratoga Bancorp ("Saratoga") and Saratoga
National Bank, a wholly owned subsidiary of Saratoga, have entered into an
Agreement and Plan of Merger, dated as of August 27, 1999 (the "Agreement"),
pursuant to which Saratoga will be merged with and into SJNB (the "Merger").
Upon consummation of the Merger, each share of Saratoga common stock, no par
value, issued and outstanding immediately prior to the Merger, other than
certain shares specified in the Agreement, will be converted into the right to
receive 0.70 shares (the "Exchange Ratio") of SJNB common stock, no par value.
The Exchange Ratio is subject to possible adjustment under certain
circumstances, as set forth in the Agreement. The terms and conditions of the
Merger are more fully set forth in the Agreement. You have requested our
opinion as to the fairness, from a financial point of view, of the Exchange
Ratio to the holders of shares of SJNB common stock.

   Sandler O'Neill & Partners, L.P., as part of its investment banking
business, is regularly engaged in the valuation of financial institutions and
their securities in connection with mergers and acquisitions and other
corporate transactions. In connection with this opinion, we have reviewed,
among other things: (i) the Agreement and exhibits thereto; (ii) the Stock
Option Agreement, dated August 27, 1999, by and between SJNB and Saratoga;
(iii) certain publicly available financial statements of SJNB and other
historical financial information provided by SJNB that we deemed relevant; (iv)
certain publicly available financial statements of Saratoga and other
historical financial information provided by Saratoga that we deemed relevant;
(v) certain internal financial analyses and forecasts of SJNB prepared by and
reviewed with management of SJNB and the views of senior management of SJNB,
based on certain limited discussions with certain members of senior management,
regarding SJNB's past and current business, financial condition, results of
operations and future prospects; (vi) certain internal financial analyses and
forecasts of Saratoga prepared by and reviewed with management of Saratoga and
the views of senior management of Saratoga, based on certain limited
discussions with certain members of senior management, regarding Saratoga's
past and current business, financial condition, results of operations and
future prospects; (vii) the pro forma impact of the Merger on SJNB; (viii) the
publicly reported historical price and trading activity for SJNB's and
Saratoga's common stock, including a comparison of certain financial and stock
market information for SJNB and Saratoga with similar publicly available
information for certain other companies the securities of which are publicly
traded; (ix) the financial terms of recent business combinations in the
commercial banking industry, to the extent publicly available; (x) the current
market environment generally and the banking environment in particular; and
(xi) such other information, financial studies, analyses and investigations and
financial, economic and market criteria as we considered relevant.

   In performing our review, we have assumed and relied upon the accuracy and
completeness of all the financial information, analyses and other information
that was publicly available or otherwise furnished to,

                                      D-1
<PAGE>

reviewed by or discussed with us, and we do not assume any responsibility or
liability for independently verifying the accuracy or completeness thereof. We
did not make an independent evaluation or appraisal of the specific assets, the
collateral securing assets or the liabilities (contingent or otherwise) of SJNB
or Saratoga or any of their subsidiaries, or the collectibility of any such
assets, nor have we been furnished with any such evaluations or appraisals. We
did not make an independent evaluation of the adequacy of the allowance for
loan losses of SJNB or Saratoga nor have we reviewed any individual credit
files relating to SJNB and Saratoga and, with your permission, we have assumed
that the respective allowances for loan losses for both SJNB and Saratoga are
adequate to cover such losses and will be adequate on a pro forma basis for the
combined entity. With respect to the financial projections reviewed with
management, we have assumed that they have been reasonably prepared on bases
reflecting the best currently available estimates and judgments of the
respective managements of the respective future financial performance of SJNB
and Saratoga and that such performances will be achieved, and we express no
opinion as to such financial projections or the assumptions on which they are
based. We have also assumed that there has been no material change in SJNB's or
Saratoga's assets, financial condition, results of operations, business or
prospects since the date of the most recent financial statements made available
to us. We have assumed in all respects material to our analysis that SJNB and
Saratoga will remain as going concerns for all periods relevant to our
analyses, that all of the representations and warranties contained in the
Agreement and all related agreements are true and correct, that each party to
such agreements will perform all of the covenants required to be performed by
such party under such agreements, that the conditions precedent in the
Agreement are not waived and that the Merger will be accounted for as a pooling
of interests and will qualify as a tax-free reorganization for federal income
tax purposes.

   Our opinion is necessarily based on financial, economic, market and other
conditions as in effect on, and the information made available to us as of, the
date hereof. Events occurring after the date hereof could materially affect
this opinion. We have not undertaken to update, revise or reaffirm this opinion
or otherwise comment upon events occurring after the date hereof. We are
expressing no opinion herein as to what the value of SJNB common stock will be
when issued to Saratoga's shareholders pursuant to the Agreement or the prices
at which SJNB's or Saratoga's common stock will trade at any time.

   We have been retained by you solely to render this opinion and will receive
a fee for our services. We did not act as a financial advisor to SJNB in
connection with its determination to engage in the Merger and did not
participate in the negotiation of the Exchange Ratio or the Agreement.

   In the ordinary course of our business as a broker-dealer, we may purchase
securities from and sell securities to SJNB and Saratoga. We may also actively
trade the debt or equity securities of SJNB and Saratoga for our own account
and for the accounts of our customers and, accordingly, may at any time hold a
long or short position in such securities.

   Our opinion is directed to the Board of Directors of SJNB for its
information and does not constitute a recommendation to any shareholder of SJNB
as to how such shareholder should vote at any meeting of shareholders called to
consider and vote upon the Merger. Our opinion is not to be quoted or referred
to, in whole or in part, in a registration statement, prospectus, proxy
statement or in any other document, nor shall this opinion be used for any
other purposes, without Sandler O'Neill's prior written consent; provided,
however, that we hereby consent to the inclusion of this opinion as an annex to
SJNB's and Saratoga's Joint Proxy Statement/Prospectus relating to the Merger
and to the references to this opinion therein.

   Based upon and subject to the foregoing, it is our opinion, as of the date
hereof, that the Exchange Ratio is fair, from a financial point of view, to the
holders of shares of SJNB common stock.

                                        Very truly yours,


                                      D-2
<PAGE>

                                                                         ANNEX E

CHAPTER 13. Dissenters' Rights.

(S)1300. Reorganization or short-form merger; dissenting shares; corporate
purchase at fair market value; definitions--

   (a) If the approval of the outstanding shares (Section 152) of a corporation
is required for a reorganization under subdivisions (a) and (b) or subdivision
(e) or (f) of Section 1201, each shareholder of the corporation entitled to
vote on the transaction and each shareholder of a subsidiary corporation in a
short-form merger may, by complying with this chapter, require the corporation
in which the shareholder holds shares to purchase for cash at their fair market
value the shares owned by the shareholder which are dissenting shares as
defined in subdivision (b). The fair market value shall be determined as of the
day before the first announcement of the terms of the proposed reorganization
or short-form merger, excluding any appreciation or depreciation in consequence
of the proposed action, but adjusted for any stock split, reverse stock split,
or share dividend which becomes effective thereafter.

   (b) As used in this chapter, "dissenting shares" means shares which come
within all of the following descriptions:

     (1) Which were not immediately prior to the reorganization or short-form
  merger either (A) listed on any national securities exchange certified by
  the Commissioner of Corporations under subdivision (o) of Section 25100 or
  (B) listed on the list of OTC margin stocks issued by the Board of
  Governors of the Federal Reserve System, and the notice of meeting of
  shareholders to act upon the reorganization summarizes this section and
  Sections 1301, 1302, 1303 and 1304; provided, however, that this provision
  does not apply to any shares with respect to which there exists any
  restriction on transfer imposed by the corporation or by any law or
  regulation; and provided, further, that this provision does not apply to
  any class of shares described in subparagraph (A) or (B) if demands for
  payment are filed with respect to 5 percent or more of the outstanding
  shares of that class.

     (2) Which were outstanding on the date for the determination of
  shareholders entitled to vote on the reorganization and (A) were not voted
  in favor of the reorganization or, (B) if described in subparagraph (A) or
  (B) of paragraph (1) (without regard to the provisos in that paragraph),
  were voted against the reorganization, or which were held of record on the
  effective date of a short-form merger; provided, however, that subparagraph
  (A) rather than subparagraph (B) of this paragraph applies in any case
  where the approval required by Section 1201 is sought by written consent
  rather than at a meeting.

     (3) Which the dissenting shareholder has demanded that the corporation
  purchase at their fair market value, in accordance with Section 1301.

     (4) Which the dissenting shareholder has submitted for endorsement, in
  accordance with Section 1302.

   (c) As used in this chapter, "dissenting shareholder" means the recordholder
of dissenting shares and includes a transferee of record.

(S)1301. Notice to holders of dissenting shares in reorganizations; demand for
purchase; time; contents--

   (a) If, in the case of a reorganization, any shareholders of a corporation
have a right under Section 1300, subject to compliance with paragraphs (3) and
(4) of subdivision (b) thereof, to require the corporation to purchase their
shares for cash, such corporation shall mail to each such shareholder a notice
of the approval of the reorganization by its outstanding shares (Section 152)
within 10 days after the date of such approval, accompanied by a copy of
Sections 1300, 1302, 1303, 1304 and this section, a statement of the price
determined by the corporation to represent the fair market value of the
dissenting shares, and a brief description of the procedure to be followed if
the shareholder desires to exercise the shareholder's right under such

                                      E-1
<PAGE>

sections. The statement of price constitutes an offer by the corporation to
purchase at the price stated any dissenting shares as defined in subdivision
(b) of Section 1300, unless they lose their status as dissenting shares under
Section 1309.

   (b) Any shareholder who has a right to require the corporation to purchase
the shareholder's shares for cash under Section 1300, subject to compliance
with paragraphs (3) and (4) of subdivision (b) thereof, and who desires the
corporation to purchase such shares shall make written demand upon the
corporation for the purchase of such shares and payment to the shareholder in
cash of their fair market value. The demand is not effective for any purpose
unless it is received by the corporation or any transfer agent thereof (1) in
the case of shares described in clause (i) or (ii) of paragraph (1) of
subdivision (b) of Section 1300 (without regard to the provisos in that
paragraph), not later than the date of the shareholders' meeting to vote upon
the reorganization, or (2) in any other case within 30 days after the date on
which the notice of the approval by the outstanding shares pursuant to
subdivision (a) or the notice pursuant to subdivision (i) of Section 1110 was
mailed to the shareholder.

   (c) The demand shall state the number and class of the shares held of record
by the shareholder which the shareholder demands that the corporation purchase
and shall contain a statement of what such shareholder claims to be the fair
market value of those shares as of the day before the announcement of the
proposed reorganization or short-form merger. The statement of fair market
value constitutes an offer by the shareholder to sell the shares at such price.

(S)1302. Submission of share certificates for endorsement; uncertificated
securities--

   Within 30 days after the date on which notice of the approval by the
outstanding shares or the notice pursuant to subdivision (i) of Section 1110
was mailed to the shareholder, the shareholder shall submit to the corporation
at its principal office or at the office of any transfer agent thereof, (a) if
the shares are certificated securities, the shareholder's certificates
representing any shares which the shareholder demands that the corporation
purchase, to be stamped or endorsed with a statement that the shares are
dissenting shares or to be exchanged for certificates of appropriate
denomination so stamped or endorsed or (b) if the shares are uncertificated
securities, written notice of the number of shares which the shareholder
demands that the corporation purchase. Upon subsequent transfers of the
dissenting shares on the books of the corporation, the new certificates,
initial transaction statement, and other written statements issued therefor
shall bear a like statement, together with the name of the original dissenting
holder of the shares.

(S)1303. Payment of agreed price with interest; agreement fixing fair market
value; filing; time of payment--

   (a) If the corporation and the shareholder agree that the shares are
dissenting shares and agree upon the price of the shares, the dissenting
shareholder is entitled to the agreed price with interest thereon at the legal
rate on judgments from the date of the agreement. Any agreements fixing the
fair market value of any dissenting shares as between the corporation and the
holders thereof shall be filed with the secretary of the corporation.

   (b) Subject to the provisions of Section 1306, payment of the fair market
value of dissenting shares shall be made within 30 days after the amount
thereof has been agreed or within 30 days after any statutory or contractual
conditions to the reorganization are satisfied, whichever is later, and in the
case of certificated securities, subject to surrender of the certificates
therefor, unless provided otherwise by agreement.

(S)1304. Action to determine whether shares are dissenting shares or fair
market value; limitation; joinder; consolidation; determination of issues;
appointment of appraisers--

   (a) If the corporation denies that the shares are dissenting shares, or the
corporation and the shareholder fail to agree upon the fair market values of
the shares, then the shareholder demanding purchase of such shares

                                      E-2
<PAGE>

as dissenting shares or any interested corporation, within six months after the
date on which notice of the approval by the outstanding shares (Section 152) or
notice pursuant to subdivision (i) of Section 1110 was mailed to the
shareholder, but not thereafter, may file a complaint in the superior court of
the proper county praying the court to determine whether the shares are
dissenting shares or the fair market value of the dissenting shares or both or
may intervene in any action pending on such a complaint.

   (b) Two or more dissenting shareholders may join as plaintiffs or be joined
as defendants in any such action and two or more such actions may be
consolidated.

   (c) On the trial of the action, the court shall determine the issues. If the
status of the shares as dissenting shares is in issue, the court shall first
determine that issue. If the fair market value of the dissenting shares is in
issue, the court shall determine, or shall appoint one or more impartial
appraisers to determine, the fair market value of the shares.

(S)1305. Report of appraisers; confirmation; determination by court; judgment;
payment; appeal; costs--

   (a) If the court appoints an appraiser or appraisers, they shall proceed
forthwith to determine the fair market value per share. Within the time fixed
by the court, the appraisers, or a majority of them, shall make and file a
report in the office of the clerk of the court. Thereupon, on the motion of any
party, the report shall be submitted to the court and considered on such
evidence as the court considers relevant. If the court finds the report
reasonable, the court may confirm it.

   (b) If a majority of the appraisers appointed fail to make and file a report
within 10 days from the date of their appointment or within such further time
as may be allowed by the court or the report is not confirmed by the court, the
court shall determine the fair market value of the dissenting shares.

   (c) Subject to the provisions of Section 1306, judgment shall be rendered
against the corporation for payment of an amount equal to the fair market value
of each dissenting share multiplied by the number of dissenting shares which
any dissenting shareholder who is a party, or who has intervened, is entitled
to require the corporation to purchase, with interest thereon at the legal rate
from the date on which judgment was entered.

   (d) Any such judgment shall be payable forthwith with respect to
uncertificated securities and, with respect to certificated securities, only
upon the endorsement and delivery to the corporation of the certificates for
the shares described in the judgment. Any party may appeal from the judgment.

   (e) The costs of the action, including reasonable compensation to the
appraisers to be fixed by the court, shall be assessed or apportioned as the
court considers equitable, but, if the appraisal exceeds the price offered by
the corporation, the corporation shall pay the costs (including in the
discretion of the court attorneys' fees, fees of expert witnesses and interest
at the legal rate on judgments from the date of compliance with Sections 1300,
1301 and 1302 if the value awarded by the court for the shares is more than 125
percent of the price offered by the corporation under subdivision (a) of
Section 1301).

(S)1306. Prevention of immediate payment; status as creditors; interest--

   To the extent that the provisions of Chapter 5 prevent the payment to any
holders of dissenting shares of their fair market value, they shall become
creditors of the corporation for the amount thereof together with interest at
the legal rate on judgments until the date of payment, but subordinate to all
other creditors in any liquidation proceeding, such debt to be payable when
permissible under the provisions of Chapter 5.

(S)1307. Dividends on dissenting shares--

   Cash dividends declared and paid by the corporation upon the dissenting
shares after the date of approval of the reorganization by the outstanding
shares (Section 152) and prior to payment for the shares by the corporation
shall be credited against the total amount to be paid by the corporation
therefor.

                                      E-3
<PAGE>

(S)1308. Rights of dissenting shareholders pending valuation; withdrawal of
demand for payment--

   Except as expressly limited in this chapter, holders of dissenting shares
continue to have all the rights and privileges incident to their shares, until
the fair market value of their shares is agreed upon or determined. A
dissenting shareholder may not withdraw a demand for payment unless the
corporation consents thereto.

(S)1309. Termination of dissenting share and shareholder status--

   Dissenting shares lose their status as dissenting shares and the holders
thereof cease to be dissenting shareholders and cease to be entitled to require
the corporation to purchase their shares upon the happening of any of the
following:

   (a) The corporation abandons the reorganization. Upon abandonment of the
reorganization, the corporation shall pay on demand to any dissenting
shareholder who has initiated proceedings in good faith under this chapter all
necessary expenses incurred in such proceedings and reasonable attorneys' fees.

   (b) The shares are transferred prior to their submission for endorsement in
accordance with Section 1302 or are surrendered for conversion into shares of
another class in accordance with the articles.

   (c) The dissenting shareholder and the corporation do not agree upon the
status of the shares as dissenting shares or upon the purchase price of the
shares, and neither files a complaint or intervenes in a pending action as
provided in Section 1304, within six months after the date on which notice of
the approval by the outstanding shares or notice pursuant to subdivision (i) of
Section 1110 was mailed to the shareholder.

   (d) The dissenting shareholder, with the consent of the corporation,
withdraws the shareholder's demand for purchase of the dissenting shares.

(S)1310. Suspension of right to compensation or valuation proceedings;
litigation of shareholders' approval--

   If litigation is instituted to test the sufficiency or regularity of the
votes of the shareholders in authorizing a reorganization, any proceedings
under Sections 1304 and 1305 shall be suspended until final determination of
such litigation.

(S)1311. Exempt shares--

   This chapter, except Section 1312, does not apply to classes of shares whose
terms and provisions specifically set forth the amount to be paid in respect to
such shares in the event of a reorganization or merger.

(S)1312. Right of dissenting shareholder to attack, set aside or rescind merger
or reorganization; restraining order or injunction; conditions--

   (a) No shareholder of a corporation who has a right under this chapter to
demand payment of cash for the shares held by the shareholder shall have any
right at law or in equity to attack the validity of the reorganization or
short-form merger, or to have the reorganization or short-form merger set aside
or rescinded, except in an action to test whether the number of shares required
to authorize or approve the reorganization have been legally voted in favor
thereof; but any holder of shares of a class whose terms and provisions
specifically set forth the amount to be paid in respect to them in the event of
a reorganization or short-form merger is entitled to payment in accordance with
those terms and provisions or, if the principal terms of the reorganization are
approved pursuant to subdivision (b) of Section 1202, is entitled to payment in
accordance with the terms and provisions of the approved reorganization.

   (b) If one of the parties to a reorganization or short-form merger is
directly or indirectly controlled by, or under common control with, another
party to the reorganization or short-form merger, subdivision (a) shall not

                                      E-4
<PAGE>

apply to any shareholder of such party who has not demanded payment of cash for
such shareholder's shares pursuant to this chapter; but if the shareholder
institutes any action to attack the validity of the reorganization or short-
form merger or to have the reorganization or short-form merger set aside or
rescinded, the shareholder shall not thereafter have any right to demand
payment of cash for the shareholder's shares pursuant to this chapter. The
court in any action attacking the validity of the reorganization or short-form
merger or to have the reorganization or short-form merger set aside or
rescinded shall not restrain or enjoin the consummation of the transaction
except upon 10 days' prior notice to the corporation and upon a determination
by the court that clearly no other remedy will adequately protect the
complaining shareholder or the class of shareholders of which such shareholder
is a member.

   (c) If one of the parties to a reorganization or short-form merger is
directly or indirectly controlled by, or under common control with, another
party to the reorganization or short-form merger, in any action to attack the
validity of the reorganization or short-form merger or to have the
reorganization or short-form merger set aside or rescinded, (1) a party to a
reorganization or short-form merger which controls another party to the
reorganization or short-form merger shall have the burden of proving that the
transaction is just and reasonable as to the shareholders of the controlled
party, and (2) a person who controls two or more parties to a reorganization
shall have the burden of proving that the transaction is just and reasonable as
to the shareholders of any party so controlled.

                                      E-5
<PAGE>

                                                                    Exhibit 99.1

          THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS
                            OF SJNB FINANCIAL CORP.

The undersigned acknowledges receipt of the Notice of Special Meeting of
Shareholders of SJNB Financial Corp., a California corporation, and the
accompanying joint proxy statement/prospectus dated October __, 1999, and
revoking any proxy heretofore given, hereby constitutes and appoints Douglas L.
Shen, Diane P. Rubino and F. Jack Gorry, and any of them, with full power of
substitution, as attorneys and proxies to appear and vote all of the shares of
Common Stock of SJNB Financial Corp. standing in the name of the undersigned
which the undersigned could vote if personally present and acting at the Special
Meeting of Shareholders of SJNB Financial Corp. to be held at San Jose National
Bank, One North Market Street, San Jose, California on December 13, 1999 at
10:00 a.m. local time, or at any adjournments or postponements thereof, upon the
following items as set forth in the Notice of Special Meeting and more fully
described in the joint proxy statement/prospectus.


1.   Approval of Merger Agreement. To consider and vote upon a proposal to
     ----------------------------
     approve the Agreement and Plan of Merger, dated as of August 27, 1999,
     among SJNB Financial Corp., Saratoga Bancorp and Saratoga National Bank and
     the transactions contemplated by the merger agreement, including the
     resulting issuance of shares of SJNB Financial Corp. common stock in
     connection with the merger of Saratoga Bancorp into SJNB Financial Corp.


          [_]  FOR                 [_]  AGAINST             [_]  ABSTAIN

2.   Other Business. The proxies are authorized to vote in their discretion on
     --------------
     such other matters as may properly come before the meeting or any
     adjournment or postponement thereof.

THIS PROXY IS SOLICITED BY AND ON BEHALF OF THE BOARD OF DIRECTORS AND MAY BE
REVOKED PRIOR TO ITS EXERCISE. THIS PROXY, WHEN PROPERLY EXECUTED, WILL BE VOTED
IN THE MANNER HEREIN SPECIFIED BY THE UNDERSIGNED SHAREHOLDER. IF NO DIRECTION
IS INDICATED, THIS PROXY WILL BE VOTED IN FAVOR OF PROPOSAL 1 AND IN ACCORDANCE
WITH THE DISCRETION OF THE PROXIES ON ANY OTHER MATTERS TO COME BEFORE THE
SPECIAL MEETING.

Number of Common Shares _____       Dated ________________, 1999
I/We  [_] do or [_] do not
expect to attend this meeting.      SHAREHOLDER(S)

                                    ___________________________________________
                                                   (Signature)

                                    ___________________________________________
                                                   (Signature)


<PAGE>

                                    (Please mark, date and sign this proxy
                                    exactly as your name appears hereon and
                                    return this proxy promptly in the enclosed
                                    envelope. Executors, administrators,
                                    guardians, officers of the corporation and
                                    others signing in a fiduciary capacity
                                    should state their full titles as such. If
                                    shares are held by joint tenants or as
                                    community property, both should sign.)

                        DO NOT FOLD, STAPLE OR MUTILATE

WHETHER OR NOT YOU PLAN TO ATTEND THE SPECIAL MEETING, YOU ARE URGED TO MARK,
SIGN, DATE AND PROMPTLY RETURN THIS PROXY, USING THE ENCLOSED ENVELOPE.


<PAGE>

                                                                    Exhibit 99.2


          THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS
                              OF SARATOGA BANCORP


The undersigned acknowledges receipt of the Notice of Special Meeting of
Shareholders of Saratoga Bancorp, a California corporation, and the accompanying
joint proxy statement/prospectus dated October __, 1999, and revoking any proxy
heretofore given, hereby constitutes and appoints Richard L. Mount and V. Ronald
Mancuso, and each of them, with full power of substitution, as attorneys and
proxies to appear and vote all of the shares of Common Stock of Saratoga Bancorp
standing in the name of the undersigned which the undersigned could vote if
personally present and acting at the Special Meeting of Shareholders of Saratoga
Bancorp to be held at Saratoga National Bank, 12000 Saratoga-Sunnyvale Road,
Saratoga, California on December 13, 1999 at 10:00 a.m. local time, or at any
adjournments or postponements thereof, upon the following items as set forth in
the Notice of Special Meeting and more fully described in the joint proxy
statement/prospectus.

1.  Approval of Merger Agreement.  To consider and vote upon a proposal to
    ----------------------------
    approve the Agreement and Plan of Merger, dated as of August 27, 1999, among
    SJNB Financial Corp., Saratoga Bancorp and Saratoga National Bank and the
    transactions contemplated by the merger agreement, including the merger of
    Saratoga Bancorp into SJNB Financial Corp.

          [_]  FOR            [_]  AGAINST             [_]  ABSTAIN

2.  Other Business.  The proxies are authorized to vote in their discretion on
    --------------
    such other matters as may properly come before the meeting or any
    adjournment or postponement thereof.

THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS AND MAY BE REVOKED
PRIOR TO ITS EXERCISE. THIS PROXY, WHEN PROPERLY EXECUTED, WILL BE VOTED IN THE
MANNER HEREIN SPECIFIED BY THE UNDERSIGNED SHAREHOLDER. IF NO DIRECTION IS
INDICATED, THIS PROXY WILL BE VOTED IN FAVOR OF PROPOSAL 1 AND IN ACCORDANCE
WITH THE DISCRETION OF THE PROXIES ON ANY OTHER MATTERS TO COME BEFORE THE
SPECIAL MEETING.

                                            Dated ________________, 1999
     I/We  [_] do or [_] do not
     expect to attend this meeting.         SHAREHOLDER(S)

                                            ___________________________________
                                                        (Signature)



                                            ___________________________________
                                                        (Signature)

<PAGE>

                                    (Please mark, date and sign this proxy
                                    exactly as your name appears hereon
                                    and return this proxy promptly in the
                                    enclosed envelope. Executors,
                                    administrators, guardians, officers of the
                                    corporation and others signing in a
                                    fiduciary capacity should state their full
                                    titles as such. If shares are held by joint
                                    tenants or as community property, both
                                    should sign.)


                        DO NOT FOLD, STAPLE OR MUTILATE

WHETHER OR NOT YOU PLAN TO ATTEND THE SPECIAL MEETING, YOU ARE URGED TO MARK,
SIGN, DATE AND PROMPTLY RETURN THIS PROXY, USING THE ENCLOSED ENVELOPE.

                                      -2-


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